From 79e38e7edd82f9f6cd9fc7fb10f13ceb72187d18 Mon Sep 17 00:00:00 2001 From: Andrew Karpow Date: Sun, 16 Feb 2014 19:46:53 +0100 Subject: [PATCH] initial mongoose checkin --- CMakeLists.txt | 39 +- cmake/FindLibWebSockets.cmake | 35 - htdocs/index.html | 16 +- htdocs/js/mpd.js | 46 +- src/http_server.h => htdocs/mkdata.pl | 64 +- src/http_server.c | 166 +- src/http_server.h | 12 +- src/mongoose.c | 4296 +++++++++++++++++++++++++ src/mongoose.h | 125 + src/mpd_client.c | 481 +-- src/mpd_client.h | 105 +- src/urldecode.c | 40 - src/ympd.c | 170 +- 13 files changed, 4907 insertions(+), 688 deletions(-) delete mode 100644 cmake/FindLibWebSockets.cmake copy src/http_server.h => htdocs/mkdata.pl (50%) create mode 100644 src/mongoose.c create mode 100644 src/mongoose.h delete mode 100644 src/urldecode.c diff --git a/CMakeLists.txt b/CMakeLists.txt index 094c895..deb3dca 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -5,27 +5,15 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/") set(CPACK_PACKAGE_VERSION_MAJOR "1") set(CPACK_PACKAGE_VERSION_MINOR "0") set(CPACK_PACKAGE_VERSION_PATCH "0") -set(CPACK_GENERATOR "DEB;RPM;TGZ") -set(CPACK_SOURCE_GENERATOR "TBZ2") -set(DEBIAN_PACKAGE_SECTION "web") -set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "MPD web client based on Websockets and Bootstrap") -set(CPACK_PACKAGE_CONTACT "Andrew Karpow ") -set(CPACK_DEBIAN_PACKAGE_MAINTAINER "andy@ndyk.de") -set(CPACK_DEBIAN_PACKAGE_DEPENDS "libssl1.0.0,libmpdclient2") - -option(WITH_STATIC_WEBSOCKETS "Build with static libwebsockets library" ON) + option(WITH_MPD_HOST_CHANGE "Let users of the web frontend change the MPD Host" ON) find_package(LibMPDClient REQUIRED) -find_package(LibWebSockets REQUIRED) -if(WITH_STATIC_WEBSOCKETS) - find_package(OpenSSL REQUIRED) - find_package(ZLIB REQUIRED) -endif() +find_package(Threads REQUIRED) configure_file(${PROJECT_SOURCE_DIR}/src/config.h.in ${PROJECT_BINARY_DIR}/config.h) -include_directories(${PROJECT_BINARY_DIR} ${LIBWEBSOCKETS_INCLUDE_DIR}) +include_directories(${PROJECT_BINARY_DIR}) include(CheckCSourceCompiles) include(CPack) @@ -33,25 +21,20 @@ include(CPack) set(CMAKE_C_FLAGS "-std=gnu99 -Wall") set(CMAKE_C_FLAGS_DEBUG "-ggdb -pedantic") +add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/http_files.h + COMMAND perl mkdata.pl index.html js/* assets/* css/* fonts/* > ${PROJECT_BINARY_DIR}/http_files.h + WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/htdocs +) + set(SOURCES src/ympd.c src/http_server.c src/mpd_client.c + src/mongoose.c ) -add_executable(ympd ${SOURCES}) - -# TODO: use generator expressions introduced to CMake 2.8.12, too fresh yet -if(WITH_STATIC_WEBSOCKETS) - find_library(LIBWEBSOCKETS_LIBRARY_STATIC libwebsockets.a) - target_link_libraries(ympd ${LIBMPDCLIENT_LIBRARY} - ${LIBWEBSOCKETS_LIBRARY_STATIC} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARIES}) -else() - target_link_libraries(ympd ${LIBMPDCLIENT_LIBRARY} - ${LIBWEBSOCKETS_LIBRARIES}) -endif() - +add_executable(ympd ${SOURCES} ${PROJECT_BINARY_DIR}/http_files.h) +target_link_libraries(ympd ${LIBMPDCLIENT_LIBRARY} ${CMAKE_THREAD_LIBS_INIT}) install(TARGETS ympd DESTINATION bin) install(FILES ympd.1 DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1) -install(DIRECTORY htdocs DESTINATION share/${PROJECT_NAME}) diff --git a/cmake/FindLibWebSockets.cmake b/cmake/FindLibWebSockets.cmake deleted file mode 100644 index 3e23d44..0000000 --- a/cmake/FindLibWebSockets.cmake +++ /dev/null @@ -1,35 +0,0 @@ -# This module tries to find libWebsockets library and include files -# -# LIBWEBSOCKETS_FOUND, If false, do not try to use libWebSockets -# LIBWEBSOCKETS_INCLUDE_DIR, path where to find libwebsockets.h -# LIBWEBSOCKETS_LIBRARY_DIR, path where to find libwebsockets.so -# LIBWEBSOCKETS_LIBRARIES, the library to link against -# -# This currently works probably only for Linux - -find_package(PkgConfig) -pkg_check_modules(PC_LIBWEBSOCKETS QUIET libwebsockets) -set(LIBWEBSOCKETS_DEFINITIONS ${PC_LIBWEBSOCKETS_CFLAGS_OTHER}) - -find_path(LIBWEBSOCKETS_INCLUDE_DIR libwebsockets.h - HINTS ${PC_LIBWEBSOCKETS_INCLUDEDIR} ${PC_LIBWEBSOCKETS_INCLUDE_DIRS} -) - -find_library(LIBWEBSOCKETS_LIBRARY websockets - HINTS ${PC_LIBWEBSOCKETS_LIBDIR} ${PC_LIBWEBSOCKETS_LIBRARY_DIRS} -) - -set(LIBWEBSOCKETS_LIBRARIES ${LIBWEBSOCKETS_LIBRARY}) -set(LIBWEBSOCKETS_INCLUDE_DIRS ${LIBWEBSOCKETS_INCLUDE_DIR}) - -include(FindPackageHandleStandardArgs) -# handle the QUIETLY and REQUIRED arguments and set LIBWEBSOCKETS_FOUND to TRUE -# if all listed variables are TRUE -find_package_handle_standard_args(LibWebSockets DEFAULT_MSG - LIBWEBSOCKETS_LIBRARY LIBWEBSOCKETS_INCLUDE_DIR -) - -mark_as_advanced( - LIBWEBSOCKETS_LIBRARY - LIBWEBSOCKETS_INCLUDE_DIR -) diff --git a/htdocs/index.html b/htdocs/index.html index 74291bb..3cd661a 100644 --- a/htdocs/index.html +++ b/htdocs/index.html @@ -39,7 +39,7 @@ @@ -197,11 +197,23 @@ +
+
+ + +
+
+ + +
+
- +
diff --git a/htdocs/js/mpd.js b/htdocs/js/mpd.js index 13b59b8..b102e64 100644 --- a/htdocs/js/mpd.js +++ b/htdocs/js/mpd.js @@ -41,7 +41,8 @@ var app = $.sammy(function() { current_app = 'playlist'; $('#breadcrump').addClass('hide'); $('#salamisandwich').find("tr:gt(0)").remove(); - $.get( "/api/get_playlist", socket.onmessage); + // $.get( "/api/get_playlist", socket.onmessage); + socket.send('MPD_API_GET_PLAYLIST'); $('#panel-heading').text("Playlist"); $('#playlist').addClass('active'); @@ -53,7 +54,8 @@ var app = $.sammy(function() { $('#salamisandwich').find("tr:gt(0)").remove(); var path = this.params['splat'][0]; - $.get( "/api/get_browse/" + encodeURIComponent(path), socket.onmessage); + // $.get( "/api/get_browse/" + encodeURIComponent(path), socket.onmessage); + socket.send('MPD_API_GET_BROWSE,' + path); $('#panel-heading').text("Browse database: "+path+""); var path_array = path.split('/'); @@ -100,13 +102,14 @@ $(document).ready(function(){ function webSocketConnect() { if (typeof MozWebSocket != "undefined") { - socket = new MozWebSocket(get_appropriate_ws_url(), "ympd-client"); + socket = new MozWebSocket(get_appropriate_ws_url()); } else { - socket = new WebSocket(get_appropriate_ws_url(), "ympd-client"); + socket = new WebSocket(get_appropriate_ws_url()); } try { socket.onopen = function() { + console.log("connected"); $('.top-right').notify({ message:{text:"Connected to ympd"}, fadeOut: { enabled: true, delay: 500 } @@ -288,7 +291,7 @@ function webSocketConnect() { break; case "update_playlist": if(current_app === 'playlist') - $.get( "/api/get_playlist", socket.onmessage); + socket.send('MPD_API_GET_PLAYLIST'); break; case "song_change": $('#currenttrack').text(" " + obj.data.title); @@ -315,6 +318,10 @@ function webSocketConnect() { case "mpdhost": $('#mpdhost').val(obj.data.host); $('#mpdport').val(obj.data.port); + if(obj.data.passwort_set) { + $('#mpd_pw').attr('placeholder', '*******'); + $('#mpd_pw_con').attr('placeholder', '*******'); + } break; case "error": $('.top-right').notify({ @@ -328,6 +335,7 @@ function webSocketConnect() { } socket.onclose = function(){ + console.log("disconnected"); $('.top-right').notify({ message:{text:"Connection to ympd lost, retrying in 3 seconds "}, type: "danger", @@ -448,30 +456,36 @@ $('#btnnotify').on('click', function (e) { } }); -function getVersion() -{ - $.get( "/api/get_version", function(response) { - $('#ympd_version').text(response.data.ympd_version); - $('#mpd_version').text(response.data.mpd_version); - }); -} - function getHost() { socket.send('MPD_API_GET_MPDHOST'); function onEnter(event) { if ( event.which == 13 ) { - setHost(); - $('#settings').modal('hide'); + confirmSettings(); } } $('#mpdhost').keypress(onEnter); $('#mpdport').keypress(onEnter); + $('#mpd_pw').keypress(onEnter); + $('#mpd_pw_con').keypress(onEnter); + } -function setHost() { +function confirmSettings() { + if($('#mpd_pw').val().length + $('#mpd_pw_con').val().length > 0) { + if ($('#mpd_pw').val() !== $('#mpd_pw_con').val()) + { + $('#mpd_pw_con').popover('show'); + setTimeout(function() { + $('#mpd_pw_con').popover('hide'); + }, 2000); + return; + } else + socket.send('MPD_API_SET_MPDPASS,'+$('#mpd_pw').val()); + } socket.send('MPD_API_SET_MPDHOST,'+$('#mpdport').val()+','+$('#mpdhost').val()); + $('#settings').modal('hide'); } function notificationsSupported() { diff --git a/src/http_server.h b/htdocs/mkdata.pl similarity index 50% copy from src/http_server.h copy to htdocs/mkdata.pl index 035f352..9f3fc00 100644 --- a/src/http_server.h +++ b/htdocs/mkdata.pl @@ -1,5 +1,30 @@ +# This program is used to embed arbitrary data into a C binary. It takes +# a list of files as an input, and produces a .c data file that contains +# contents of all these files as collection of char arrays. +# +# Usage: perl [file2, ...] > embedded_data.c + +use File::MimeInfo; + +foreach my $i (0 .. $#ARGV) { + open FD, '<:raw', $ARGV[$i] or die "Cannot open $ARGV[$i]: $!\n"; + printf("static const unsigned char v%d[] = {", $i); + my $byte; + my $j = 0; + while (read(FD, $byte, 1)) { + if (($j % 12) == 0) { + print "\n"; + } + printf ' %#04x,', ord($byte); + $j++; + } + print " 0x00\n};\n"; + close FD; +} + +print < + (c) 2013-2014 Andrew Karpow This project's homepage is: http://www.ympd.org Redistribution and use in source and binary forms, with or without @@ -26,18 +51,37 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef __HTTP_SERVER_H__ -#define __HTTP_SERVER_H__ +#ifndef __HTTP_FILES_H__ +#define __HTTP_FILES_H__ + +#include +#include +#include + +static const struct embedded_file { + const char *name; + const unsigned char *data; + const char *mimetype; + size_t size; +} embedded_files[] = { +EOS -#include +foreach my $i (0 .. $#ARGV) { + my $mime = mimetype($ARGV[$i]); + print " {\"/$ARGV[$i]\", v$i, \"$mime\", sizeof(v$i) - 1},\n"; +} -struct per_session_data__http { - int fd; +print <name != NULL; p++) + if (!strcmp(p->name, name)) + return p; + return NULL; +} #endif +EOS diff --git a/src/http_server.c b/src/http_server.c index 3b7e6c6..2e84b81 100644 --- a/src/http_server.c +++ b/src/http_server.c @@ -26,159 +26,29 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include -#include #include -#include -#include -#include -#include #include "http_server.h" -#include "mpd_client.h" -#include "config.h" +#include "http_files.h" -char *resource_path = LOCAL_RESOURCE_PATH; -extern enum mpd_conn_states mpd_conn_state; - -struct serveable { - const char *urlpath; - const char *mimetype; -}; - -static const struct serveable whitelist[] = { - { "/css/bootstrap.css", "text/css" }, - { "/css/mpd.css", "text/css" }, - - { "/js/bootstrap.min.js", "text/javascript" }, - { "/js/mpd.js", "text/javascript" }, - { "/js/jquery-1.10.2.min.js", "text/javascript" }, - { "/js/jquery.cookie.js", "text/javascript" }, - { "/js/bootstrap-slider.js", "text/javascript" }, - { "/js/bootstrap-notify.js", "text/javascript" }, - { "/js/sammy.js", "text/javascript" }, - - { "/fonts/glyphicons-halflings-regular.woff", "application/x-font-woff"}, - { "/fonts/glyphicons-halflings-regular.svg", "image/svg+xml"}, - { "/fonts/glyphicons-halflings-regular.ttf", "application/x-font-ttf"}, - { "/fonts/glyphicons-halflings-regular.eot", "application/vnd.ms-fontobject"}, - - { "/assets/favicon.ico", "image/vnd.microsoft.icon" }, - - /* last one is the default served if no match */ - { "/index.html", "text/html" }, -}; - -static const char http_header[] = "HTTP/1.0 200 OK\x0d\x0a" - "Server: libwebsockets\x0d\x0a" - "Content-Type: application/json\x0d\x0a" - "Content-Length: 000000\x0d\x0a\x0d\x0a"; - -/* Converts a hex character to its integer value */ -char from_hex(char ch) { - return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10; -} - -/* Returns a url-decoded version of str */ -/* IMPORTANT: be sure to free() the returned string after use */ -char *url_decode(char *str) { - char *pstr = str, *buf = malloc(strlen(str) + 1), *pbuf = buf; - while (*pstr) { - if (*pstr == '%') { - if (pstr[1] && pstr[2]) { - *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]); - pstr += 2; - } - } else if (*pstr == '+') { - *pbuf++ = ' '; - } else { - *pbuf++ = *pstr; - } - pstr++; - } - *pbuf = '\0'; - return buf; -} - -int callback_http(struct libwebsocket_context *context, - struct libwebsocket *wsi, - enum libwebsocket_callback_reasons reason, void *user, - void *in, size_t len) +int callback_http(struct mg_connection *c) { - char *response_buffer, *p; - char buf[64]; - size_t n, response_size = 0; - - switch (reason) { - case LWS_CALLBACK_HTTP: - if(in && strncmp((const char *)in, "/api/", 5) == 0) - { - - p = (char *)malloc(MAX_SIZE + 100); - memcpy(p, http_header, sizeof(http_header) - 1); - response_buffer = p + sizeof(http_header) - 1; - - /* put content length and payload to buffer */ - if(mpd_conn_state != MPD_CONNECTED) {} - else if(strncmp((const char *)in, "/api/get_browse", 15) == 0) - { - char *url; - if(sscanf(in, "/api/get_browse/%m[^\t\n]", &url) == 1) - { - char *url_decoded = url_decode(url); - response_size = mpd_put_browse(response_buffer, url_decoded); - free(url_decoded); - free(url); - } - else - response_size = mpd_put_browse(response_buffer, "/"); - - } - else if(strncmp((const char *)in, "/api/get_playlist", 17) == 0) - response_size = mpd_put_playlist(response_buffer); - else if(strncmp((const char *)in, "/api/get_version", 16) == 0) - response_size = snprintf(response_buffer, MAX_SIZE, - "{\"type\":\"version\",\"data\":{" - "\"ympd_version\":\"%d.%d.%d\"," - "\"mpd_version\":\"%d.%d.%d\"" - "}}", - YMPD_VERSION_MAJOR, YMPD_VERSION_MINOR, YMPD_VERSION_PATCH, - LIBMPDCLIENT_MAJOR_VERSION, LIBMPDCLIENT_MINOR_VERSION, - LIBMPDCLIENT_PATCH_VERSION); - - /* Copy size to content-length field */ - sprintf(buf, "%6zu", response_size); - memcpy(p + sizeof(http_header) - 11, buf, 6); - - n = libwebsocket_write(wsi, (unsigned char *)p, - sizeof(http_header) - 1 + response_size, LWS_WRITE_HTTP); - - free(p); - /* - * book us a LWS_CALLBACK_HTTP_WRITEABLE callback - */ - libwebsocket_callback_on_writable(context, wsi); - - } - else - { - for (n = 0; n < (sizeof(whitelist) / sizeof(whitelist[0]) - 1); n++) - if (in && strcmp((const char *)in, whitelist[n].urlpath) == 0) - break; - - sprintf(buf, "%s%s", resource_path, whitelist[n].urlpath); - - if (libwebsockets_serve_http_file(context, wsi, buf, whitelist[n].mimetype, NULL)) - return -1; /* through completion or error, close the socket */ - } - break; - - case LWS_CALLBACK_HTTP_FILE_COMPLETION: - /* kill the connection after we sent one file */ - return -1; - default: - break; + const struct embedded_file *req_file; + + if(!strcmp(c->uri, "/")) + req_file = find_embedded_file("/index.html"); + else + req_file = find_embedded_file(c->uri); + + if(req_file) + { + mg_send_header(c, "Content-Type", req_file->mimetype); + mg_send_data(c, req_file->data, req_file->size); + + return MG_REQUEST_PROCESSED; } - return 0; + mg_send_status(c, 404); + mg_printf_data(c, "Not Found"); + return MG_REQUEST_PROCESSED; } diff --git a/src/http_server.h b/src/http_server.h index 035f352..6649cc6 100644 --- a/src/http_server.h +++ b/src/http_server.h @@ -29,15 +29,9 @@ #ifndef __HTTP_SERVER_H__ #define __HTTP_SERVER_H__ -#include - -struct per_session_data__http { - int fd; -}; -int callback_http(struct libwebsocket_context *context, - struct libwebsocket *wsi, - enum libwebsocket_callback_reasons reason, void *user, - void *in, size_t len); +#include "mongoose.h" + +int callback_http(struct mg_connection *c); #endif diff --git a/src/mongoose.c b/src/mongoose.c new file mode 100644 index 0000000..863d25d --- /dev/null +++ b/src/mongoose.c @@ -0,0 +1,4296 @@ +// Copyright (c) 2004-2013 Sergey Lyubka +// Copyright (c) 2013-2014 Cesanta Software Limited +// All rights reserved +// +// This library is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see . +// +// You are free to use this library under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. +// +// Alternatively, you can license this library under a commercial +// license, as set out in . + +#undef UNICODE // Use ANSI WinAPI functions +#undef _UNICODE // Use multibyte encoding on Windows +#define _MBCS // Use multibyte encoding on Windows +#define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows +#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+ +#undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h +#define _XOPEN_SOURCE 600 // For flockfile() on Linux +#define __STDC_FORMAT_MACROS // wants this for C++ +#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX +#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions +#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets + +#ifdef _MSC_VER +#pragma warning (disable : 4127) // FD_SET() emits warning, disable it +#pragma warning (disable : 4204) // missing c99 support +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef _WIN32 +#include +#include // For _beginthread +#include // For _lseeki64 +#include // For _mkdir +typedef int socklen_t; +#if !defined(__MINGW32__) || !defined(_PID_T_) || defined(_NO_OLDNAMES) +typedef HANDLE pid_t; +#endif +typedef SOCKET sock_t; +typedef unsigned char uint8_t; +typedef unsigned int uint32_t; +typedef unsigned short uint16_t; +typedef unsigned __int64 uint64_t; +typedef __int64 int64_t; +typedef CRITICAL_SECTION mutex_t; +typedef struct _stati64 file_stat_t; +#pragma comment(lib, "ws2_32.lib") +#define snprintf _snprintf +#define vsnprintf _vsnprintf +#define INT64_FMT "I64d" +#ifndef EINPROGRESS +#define EINPROGRESS WSAEINPROGRESS +#endif +#ifndef EWOULDBLOCK +#define EWOULDBLOCK WSAEWOULDBLOCK +#endif +#define mutex_init(x) InitializeCriticalSection(x) +#define mutex_destroy(x) DeleteCriticalSection(x) +#define mutex_lock(x) EnterCriticalSection(x) +#define mutex_unlock(x) LeaveCriticalSection(x) +#define get_thread_id() ((unsigned long) GetCurrentThreadId()) +#ifndef S_ISDIR +#define S_ISDIR(x) ((x) & _S_IFDIR) +#endif +#define sleep(x) Sleep((x) * 1000) +#define stat(x, y) mg_stat((x), (y)) +#define fopen(x, y) mg_fopen((x), (y)) +#define open(x, y) mg_open((x), (y)) +#define lseek(x, y, z) _lseeki64((x), (y), (z)) +#define mkdir(x, y) _mkdir(x) +#define to64(x) _atoi64(x) +#define flockfile(x) +#define funlockfile(x) +#ifndef va_copy +#define va_copy(x,y) x = y +#endif // MINGW #defines va_copy +#ifndef __func__ +#define STRX(x) #x +#define STR(x) STRX(x) +#define __func__ __FILE__ ":" STR(__LINE__) +#endif +#else +#include +#include +#include +#include +#include +#include +#include +#include // For inet_pton() when MONGOOSE_USE_IPV6 is defined +#include +#include +#include +#define closesocket(x) close(x) +typedef int sock_t; +typedef pthread_mutex_t mutex_t; +typedef struct stat file_stat_t; +#define mutex_init(x) pthread_mutex_init(x, NULL) +#define mutex_destroy(x) pthread_mutex_destroy(x) +#define mutex_lock(x) pthread_mutex_lock(x) +#define mutex_unlock(x) pthread_mutex_unlock(x) +#define get_thread_id() ((unsigned long) pthread_self()) +#define INVALID_SOCKET ((sock_t) -1) +#define INT64_FMT PRId64 +#define to64(x) strtoll(x, NULL, 10) +#define __cdecl +#define O_BINARY 0 +#endif + +#ifdef MONGOOSE_USE_SSL +#ifdef __APPLE__ +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif +#include +#endif + +#include "mongoose.h" + +struct ll { struct ll *prev, *next; }; +#define LINKED_LIST_INIT(N) ((N)->next = (N)->prev = (N)) +#define LINKED_LIST_DECLARE_AND_INIT(H) struct ll H = { &H, &H } +#define LINKED_LIST_ENTRY(P,T,N) ((T *)((char *)(P) - offsetof(T, N))) +#define LINKED_LIST_IS_EMPTY(N) ((N)->next == (N)) +#define LINKED_LIST_FOREACH(H,N,T) \ + for (N = (H)->next, T = (N)->next; N != (H); N = (T), T = (N)->next) +#define LINKED_LIST_ADD_TO_FRONT(H,N) do { ((H)->next)->prev = (N); \ + (N)->next = ((H)->next); (N)->prev = (H); (H)->next = (N); } while (0) +#define LINKED_LIST_ADD_TO_TAIL(H,N) do { ((H)->prev)->next = (N); \ + (N)->prev = ((H)->prev); (N)->next = (H); (H)->prev = (N); } while (0) +#define LINKED_LIST_REMOVE(N) do { ((N)->next)->prev = ((N)->prev); \ + ((N)->prev)->next = ((N)->next); LINKED_LIST_INIT(N); } while (0) + +#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) +#define MAX_REQUEST_SIZE 16384 +#define IOBUF_SIZE 8192 +#define MAX_PATH_SIZE 8192 +#define LUA_SCRIPT_PATTERN "**.lp$" +#define DEFAULT_CGI_PATTERN "**.cgi$|**.pl$|**.php$" +#define CGI_ENVIRONMENT_SIZE 8192 +#define MAX_CGI_ENVIR_VARS 64 +#define ENV_EXPORT_TO_CGI "MONGOOSE_CGI" +#define PASSWORDS_FILE_NAME ".htpasswd" + +#ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL +#define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5 +#endif + +// Extra HTTP headers to send in every static file reply +#if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS) +#define MONGOOSE_USE_EXTRA_HTTP_HEADERS "" +#endif + +#ifndef MONGOOSE_USE_POST_SIZE_LIMIT +#define MONGOOSE_USE_POST_SIZE_LIMIT 0 +#endif + +#ifndef MONGOOSE_USE_IDLE_TIMEOUT_SECONDS +#define MONGOOSE_USE_IDLE_TIMEOUT_SECONDS 30 +#endif + +#ifdef MONGOOSE_NO_SOCKETPAIR +#define MONGOOSE_NO_CGI +#endif + +#ifdef MONGOOSE_ENABLE_DEBUG +#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \ + fflush(stdout); } while(0) +#else +#define DBG(x) +#endif + +#ifdef MONGOOSE_NO_FILESYSTEM +#define MONGOOSE_NO_AUTH +#define MONGOOSE_NO_CGI +#define MONGOOSE_NO_DAV +#define MONGOOSE_NO_DIRECTORY_LISTING +#define MONGOOSE_NO_LOGGING +#endif + +union socket_address { + struct sockaddr sa; + struct sockaddr_in sin; +#ifdef MONGOOSE_USE_IPV6 + struct sockaddr_in6 sin6; +#endif +}; + +struct vec { + const char *ptr; + int len; +}; + +// For directory listing and WevDAV support +struct dir_entry { + struct connection *conn; + char *file_name; + file_stat_t st; +}; + +// NOTE(lsm): this enum shoulds be in sync with the config_options. +enum { + ACCESS_CONTROL_LIST, +#ifndef MONGOOSE_NO_FILESYSTEM + ACCESS_LOG_FILE, +#ifndef MONGOOSE_NO_AUTH + AUTH_DOMAIN, +#endif +#ifndef MONGOOSE_NO_CGI + CGI_INTERPRETER, + CGI_PATTERN, +#endif +#ifndef MONGOOSE_NO_DAV + DAV_AUTH_FILE, +#endif + DOCUMENT_ROOT, +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + ENABLE_DIRECTORY_LISTING, +#endif +#endif + EXTRA_MIME_TYPES, +#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) + GLOBAL_AUTH_FILE, +#endif + HIDE_FILES_PATTERN, +#ifndef MONGOOSE_NO_FILESYSTEM + INDEX_FILES, +#endif + LISTENING_PORT, +#ifndef _WIN32 + RUN_AS_USER, +#endif +#ifdef MONGOOSE_USE_SSL + SSL_CERTIFICATE, +#endif + URL_REWRITES, + NUM_OPTIONS +}; + +static const char *static_config_options[] = { + "access_control_list", NULL, +#ifndef MONGOOSE_NO_FILESYSTEM + "access_log_file", NULL, +#ifndef MONGOOSE_NO_AUTH + "auth_domain", "mydomain.com", +#endif +#ifndef MONGOOSE_NO_CGI + "cgi_interpreter", NULL, + "cgi_pattern", DEFAULT_CGI_PATTERN, +#endif +#ifndef MONGOOSE_NO_DAV + "dav_auth_file", NULL, +#endif + "document_root", NULL, +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + "enable_directory_listing", "yes", +#endif +#endif + "extra_mime_types", NULL, +#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) + "global_auth_file", NULL, +#endif + "hide_files_patterns", NULL, +#ifndef MONGOOSE_NO_FILESYSTEM + "index_files","index.html,index.htm,index.cgi,index.php,index.lp", +#endif + "listening_port", NULL, +#ifndef _WIN32 + "run_as_user", NULL, +#endif +#ifdef MONGOOSE_USE_SSL + "ssl_certificate", NULL, +#endif + "url_rewrites", NULL, + NULL +}; + +struct mg_server { + sock_t listening_sock; + union socket_address lsa; // Listening socket address + struct ll active_connections; + mg_handler_t request_handler; + mg_handler_t http_close_handler; + mg_handler_t error_handler; + mg_handler_t auth_handler; + char *config_options[NUM_OPTIONS]; + char local_ip[48]; + void *server_data; +#ifdef MONGOOSE_USE_SSL + SSL_CTX *ssl_ctx; // Server SSL context + SSL_CTX *client_ssl_ctx; // Client SSL context +#endif +#ifndef MONGOOSE_NO_SOCKETPAIR + sock_t ctl[2]; // Control socketpair. Used to wake up from select() call +#endif +}; + +// Expandable IO buffer +struct iobuf { + char *buf; // Buffer that holds the data + int size; // Buffer size + int len; // Number of bytes currently in a buffer +}; + +// Local endpoint representation +union endpoint { + int fd; // Opened regular local file + sock_t cgi_sock; // CGI socket + void *ssl; // SSL descriptor +}; + +enum endpoint_type { EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT }; +enum connection_flags { + CONN_CLOSE = 1, // Connection must be closed at the end of the poll + CONN_SPOOL_DONE = 2, // All data has been buffered for sending + CONN_SSL_HANDS_SHAKEN = 4, // SSL handshake has completed. Only for SSL + CONN_HEADERS_SENT = 8, // User callback has sent HTTP headers + CONN_BUFFER = 16, // CGI only. Holds data send until CGI prints + // all HTTP headers + CONN_CONNECTING = 32, // HTTP client is doing non-blocking connect() + CONN_LONG_RUNNING = 64 // Long-running URI handlers +}; + +struct connection { + struct mg_connection mg_conn; // XXX: Must be first + struct ll link; // Linkage to server->active_connections + struct mg_server *server; + sock_t client_sock; // Connected client + struct iobuf local_iobuf; + struct iobuf remote_iobuf; + union endpoint endpoint; + enum endpoint_type endpoint_type; + time_t birth_time; + time_t last_activity_time; + char *path_info; + char *request; + int64_t num_bytes_sent; // Total number of bytes sent + int64_t cl; // Reply content length, for Range support + int request_len; // Request length, including last \r\n after last header + int flags; // CONN_* flags: CONN_CLOSE, CONN_SPOOL_DONE, etc + mg_handler_t handler; // Callback for HTTP client +#ifdef MONGOOSE_USE_SSL + SSL *ssl; // SSL descriptor +#endif +}; + +static void open_local_endpoint(struct connection *conn, int skip_user); +static void close_local_endpoint(struct connection *conn); + +static const struct { + const char *extension; + size_t ext_len; + const char *mime_type; +} static_builtin_mime_types[] = { + {".html", 5, "text/html"}, + {".htm", 4, "text/html"}, + {".shtm", 5, "text/html"}, + {".shtml", 6, "text/html"}, + {".css", 4, "text/css"}, + {".js", 3, "application/x-javascript"}, + {".ico", 4, "image/x-icon"}, + {".gif", 4, "image/gif"}, + {".jpg", 4, "image/jpeg"}, + {".jpeg", 5, "image/jpeg"}, + {".png", 4, "image/png"}, + {".svg", 4, "image/svg+xml"}, + {".txt", 4, "text/plain"}, + {".torrent", 8, "application/x-bittorrent"}, + {".wav", 4, "audio/x-wav"}, + {".mp3", 4, "audio/x-mp3"}, + {".mid", 4, "audio/mid"}, + {".m3u", 4, "audio/x-mpegurl"}, + {".ogg", 4, "application/ogg"}, + {".ram", 4, "audio/x-pn-realaudio"}, + {".xml", 4, "text/xml"}, + {".json", 5, "text/json"}, + {".xslt", 5, "application/xml"}, + {".xsl", 4, "application/xml"}, + {".ra", 3, "audio/x-pn-realaudio"}, + {".doc", 4, "application/msword"}, + {".exe", 4, "application/octet-stream"}, + {".zip", 4, "application/x-zip-compressed"}, + {".xls", 4, "application/excel"}, + {".tgz", 4, "application/x-tar-gz"}, + {".tar", 4, "application/x-tar"}, + {".gz", 3, "application/x-gunzip"}, + {".arj", 4, "application/x-arj-compressed"}, + {".rar", 4, "application/x-arj-compressed"}, + {".rtf", 4, "application/rtf"}, + {".pdf", 4, "application/pdf"}, + {".swf", 4, "application/x-shockwave-flash"}, + {".mpg", 4, "video/mpeg"}, + {".webm", 5, "video/webm"}, + {".mpeg", 5, "video/mpeg"}, + {".mov", 4, "video/quicktime"}, + {".mp4", 4, "video/mp4"}, + {".m4v", 4, "video/x-m4v"}, + {".asf", 4, "video/x-ms-asf"}, + {".avi", 4, "video/x-msvideo"}, + {".bmp", 4, "image/bmp"}, + {".ttf", 4, "application/x-font-ttf"}, + {NULL, 0, NULL} +}; + +#ifndef MONGOOSE_NO_THREADS +void *mg_start_thread(void *(*f)(void *), void *p) { +#ifdef _WIN32 + return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p); +#else + pthread_t thread_id = (pthread_t) 0; + pthread_attr_t attr; + + (void) pthread_attr_init(&attr); + (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); + +#if MONGOOSE_USE_STACK_SIZE > 1 + (void) pthread_attr_setstacksize(&attr, MONGOOSE_USE_STACK_SIZE); +#endif + + pthread_create(&thread_id, &attr, f, p); + pthread_attr_destroy(&attr); + + return (void *) thread_id; +#endif +} +#endif // MONGOOSE_NO_THREADS + +#ifdef _WIN32 +#ifndef MONGOOSE_NO_FILESYSTEM +// Encode 'path' which is assumed UTF-8 string, into UNICODE string. +// wbuf and wbuf_len is a target buffer and its length. +static void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + char buf[MAX_PATH_SIZE * 2], buf2[MAX_PATH_SIZE * 2], *p; + + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + + // Trim trailing slashes + p = buf + strlen(buf) - 1; + while (p > buf && p[0] == '\\' || p[0] == '/') *p-- = '\0'; + //change_slashes_to_backslashes(buf); + + // Convert to Unicode and back. If doubly-converted string does not + // match the original, something is fishy, reject. + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + } +} + +static int mg_stat(const char *path, file_stat_t *st) { + wchar_t wpath[MAX_PATH_SIZE]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st))); + return _wstati64(wpath, st); +} + +static FILE *mg_fopen(const char *path, const char *mode) { + wchar_t wpath[MAX_PATH_SIZE], wmode[10]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + to_wchar(mode, wmode, ARRAY_SIZE(wmode)); + return _wfopen(wpath, wmode); +} + +static int mg_open(const char *path, int flag) { + wchar_t wpath[MAX_PATH_SIZE]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + return _wopen(wpath, flag); +} +#endif +#endif // MONGOOSE_NO_FILESYSTEM + +static void set_close_on_exec(int fd) { +#ifdef _WIN32 + (void) SetHandleInformation((HANDLE) fd, HANDLE_FLAG_INHERIT, 0); +#else + fcntl(fd, F_SETFD, FD_CLOEXEC); +#endif +} + +static void set_non_blocking_mode(sock_t sock) { +#ifdef _WIN32 + unsigned long on = 1; + ioctlsocket(sock, FIONBIO, &on); +#else + int flags = fcntl(sock, F_GETFL, 0); + fcntl(sock, F_SETFL, flags | O_NONBLOCK); +#endif +} + +// A helper function for traversing a comma separated list of values. +// It returns a list pointer shifted to the next value, or NULL if the end +// of the list found. +// Value is stored in val vector. If value has form "x=y", then eq_val +// vector is initialized to point to the "y" part, and val vector length +// is adjusted to point only to "x". +static const char *next_option(const char *list, struct vec *val, + struct vec *eq_val) { + if (list == NULL || *list == '\0') { + // End of the list + list = NULL; + } else { + val->ptr = list; + if ((list = strchr(val->ptr, ',')) != NULL) { + // Comma found. Store length and shift the list ptr + val->len = list - val->ptr; + list++; + } else { + // This value is the last one + list = val->ptr + strlen(val->ptr); + val->len = list - val->ptr; + } + + if (eq_val != NULL) { + // Value has form "x=y", adjust pointers and lengths + // so that val points to "x", and eq_val points to "y". + eq_val->len = 0; + eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); + if (eq_val->ptr != NULL) { + eq_val->ptr++; // Skip over '=' character + eq_val->len = val->ptr + val->len - eq_val->ptr; + val->len = (eq_val->ptr - val->ptr) - 1; + } + } + } + + return list; +} + +static int spool(struct iobuf *io, const void *buf, int len) { + static const double mult = 1.2; + char *p = NULL; + int new_len = 0; + + assert(io->len >= 0); + assert(io->len <= io->size); + + //DBG(("1. %d %d %d", len, io->len, io->size)); + if (len <= 0) { + } else if ((new_len = io->len + len) < io->size) { + memcpy(io->buf + io->len, buf, len); + io->len = new_len; + } else if ((p = (char *) realloc(io->buf, (int) (new_len * mult))) != NULL) { + io->buf = p; + memcpy(io->buf + io->len, buf, len); + io->len = new_len; + io->size = (int) (new_len * mult); + } else { + len = 0; + } + //DBG(("%d %d %d", len, io->len, io->size)); + + return len; +} + +// Like snprintf(), but never returns negative value, or a value +// that is larger than a supplied buffer. +static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) { + int n; + if (buflen < 1) return 0; + n = vsnprintf(buf, buflen, fmt, ap); + if (n < 0) { + n = 0; + } else if (n >= (int) buflen) { + n = (int) buflen - 1; + } + buf[n] = '\0'; + return n; +} + +static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) { + va_list ap; + int n; + va_start(ap, fmt); + n = mg_vsnprintf(buf, buflen, fmt, ap); + va_end(ap); + return n; +} + +// Check whether full request is buffered. Return: +// -1 if request is malformed +// 0 if request is not yet fully buffered +// >0 actual request length, including last \r\n\r\n +static int get_request_len(const char *s, int buf_len) { + const unsigned char *buf = (unsigned char *) s; + int i; + + for (i = 0; i < buf_len; i++) { + // Control characters are not allowed but >=128 are. + // Abort scan as soon as one malformed character is found. + if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) { + return -1; + } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') { + return i + 2; + } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' && + buf[i + 2] == '\n') { + return i + 3; + } + } + + return 0; +} + +// Skip the characters until one of the delimiters characters found. +// 0-terminate resulting word. Skip the rest of the delimiters if any. +// Advance pointer to buffer to the next word. Return found 0-terminated word. +static char *skip(char **buf, const char *delimiters) { + char *p, *begin_word, *end_word, *end_delimiters; + + begin_word = *buf; + end_word = begin_word + strcspn(begin_word, delimiters); + end_delimiters = end_word + strspn(end_word, delimiters); + + for (p = end_word; p < end_delimiters; p++) { + *p = '\0'; + } + + *buf = end_delimiters; + + return begin_word; +} + +// Parse HTTP headers from the given buffer, advance buffer to the point +// where parsing stopped. +static void parse_http_headers(char **buf, struct mg_connection *ri) { + size_t i; + + for (i = 0; i < ARRAY_SIZE(ri->http_headers); i++) { + ri->http_headers[i].name = skip(buf, ": "); + ri->http_headers[i].value = skip(buf, "\r\n"); + if (ri->http_headers[i].name[0] == '\0') + break; + ri->num_headers = i + 1; + } +} + +static const char *status_code_to_str(int status_code) { + switch (status_code) { + case 200: return "OK"; + case 201: return "Created"; + case 204: return "No Content"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 304: return "Not Modified"; + case 400: return "Bad Request"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 405: return "Method Not Allowed"; + case 409: return "Conflict"; + case 411: return "Length Required"; + case 413: return "Request Entity Too Large"; + case 415: return "Unsupported Media Type"; + case 423: return "Locked"; + case 500: return "Server Error"; + case 501: return "Not Implemented"; + default: return "Server Error"; + } +} + +static void send_http_error(struct connection *conn, int code, + const char *fmt, ...) { + const char *message = status_code_to_str(code); + const char *rewrites = conn->server->config_options[URL_REWRITES]; + char headers[200], body[200]; + struct vec a, b; + va_list ap; + int body_len, headers_len, match_code; + + conn->mg_conn.status_code = code; + + // Invoke error handler if it is set + if (conn->server->error_handler != NULL && + conn->server->error_handler(&conn->mg_conn) == MG_ERROR_PROCESSED) { + close_local_endpoint(conn); + return; + } + + // Handle error code rewrites + while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { + if ((match_code = atoi(a.ptr)) > 0 && match_code == code) { + conn->mg_conn.status_code = 302; + mg_printf(&conn->mg_conn, "HTTP/1.1 %d Moved\r\n" + "Location: %.*s?code=%d&orig_uri=%s\r\n\r\n", + conn->mg_conn.status_code, b.len, b.ptr, code, + conn->mg_conn.uri); + close_local_endpoint(conn); + return; + } + } + + body_len = mg_snprintf(body, sizeof(body), "%d %s\n", code, message); + if (fmt != NULL) { + va_start(ap, fmt); + body_len += mg_vsnprintf(body + body_len, sizeof(body) - body_len, fmt, ap); + va_end(ap); + } + if (code >= 300 && code <= 399) { + // 3xx errors do not have body + body_len = 0; + } + headers_len = mg_snprintf(headers, sizeof(headers), + "HTTP/1.1 %d %s\r\nContent-Length: %d\r\n" + "Content-Type: text/plain\r\n\r\n", + code, message, body_len); + spool(&conn->remote_iobuf, headers, headers_len); + spool(&conn->remote_iobuf, body, body_len); + close_local_endpoint(conn); // This will write to the log file +} + +// Print message to buffer. If buffer is large enough to hold the message, +// return buffer. If buffer is to small, allocate large enough buffer on heap, +// and return allocated buffer. +static int alloc_vprintf(char **buf, size_t size, const char *fmt, va_list ap) { + va_list ap_copy; + int len; + + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size, fmt, ap_copy); + va_end(ap_copy); + + if (len < 0) { + // eCos and Windows are not standard-compliant and return -1 when + // the buffer is too small. Keep allocating larger buffers until we + // succeed or out of memory. + *buf = NULL; + while (len < 0) { + if (*buf) free(*buf); + size *= 2; + if ((*buf = (char *) malloc(size)) == NULL) break; + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size, fmt, ap_copy); + va_end(ap_copy); + } + } else if (len > (int) size) { + // Standard-compliant code path. Allocate a buffer that is large enough. + if ((*buf = (char *) malloc(len + 1)) == NULL) { + len = -1; + } else { + va_copy(ap_copy, ap); + len = vsnprintf(*buf, len + 1, fmt, ap_copy); + va_end(ap_copy); + } + } + + return len; +} + +static void write_chunk(struct connection *conn, const char *buf, int len) { + char chunk_size[50]; + int n = mg_snprintf(chunk_size, sizeof(chunk_size), "%X\r\n", len); + spool(&conn->remote_iobuf, chunk_size, n); + spool(&conn->remote_iobuf, buf, len); + spool(&conn->remote_iobuf, "\r\n", 2); +} + +int mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap, + int chunked) { + char mem[IOBUF_SIZE], *buf = mem; + int len; + + if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + if (chunked) { + write_chunk((struct connection *) conn, buf, len); + } else { + len = mg_write(conn, buf, (size_t) len); + } + } + if (buf != mem && buf != NULL) { + free(buf); + } + + return len; +} + +int mg_printf(struct mg_connection *conn, const char *fmt, ...) { + int len; + va_list ap; + va_start(ap, fmt); + len = mg_vprintf(conn, fmt, ap, 0); + va_end(ap); + return len; +} + +#ifndef MONGOOSE_NO_SOCKETPAIR +static int mg_socketpair(sock_t sp[2]) { + struct sockaddr_in sa; + sock_t sock, ret = -1; + socklen_t len = sizeof(sa); + + sp[0] = sp[1] = INVALID_SOCKET; + + (void) memset(&sa, 0, sizeof(sa)); + sa.sin_family = AF_INET; + sa.sin_port = htons(0); + sa.sin_addr.s_addr = htonl(0x7f000001); + + if ((sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + !bind(sock, (struct sockaddr *) &sa, len) && + !listen(sock, 1) && + !getsockname(sock, (struct sockaddr *) &sa, &len) && + (sp[0] = socket(AF_INET, SOCK_STREAM, 6)) != -1 && + !connect(sp[0], (struct sockaddr *) &sa, len) && + (sp[1] = accept(sock,(struct sockaddr *) &sa, &len)) != INVALID_SOCKET) { + set_close_on_exec(sp[0]); + set_close_on_exec(sp[1]); + ret = 0; + } else { + if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); + if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } + closesocket(sock); + + return ret; +} +#endif + +static int is_error(int n) { + return n == 0 || + (n < 0 && errno != EINTR && errno != EINPROGRESS && + errno != EAGAIN && errno != EWOULDBLOCK +#ifdef _WIN32 + && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK +#endif + ); +} + +static void discard_leading_iobuf_bytes(struct iobuf *io, int n) { + if (n >= 0 && n <= io->len) { + memmove(io->buf, io->buf + n, io->len - n); + io->len -= n; + } +} + +#ifndef MONGOOSE_NO_CGI +#ifdef _WIN32 +struct threadparam { + sock_t s; + HANDLE hPipe; +}; + +static int wait_until_ready(sock_t sock, int for_read) { + fd_set set; + FD_ZERO(&set); + FD_SET(sock, &set); + select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0); + return 1; +} + +static void *push_to_stdin(void *arg) { + struct threadparam *tp = arg; + int n, sent, stop = 0; + DWORD k; + char buf[IOBUF_SIZE]; + + while (!stop && wait_until_ready(tp->s, 1) && + (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) { + if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue; + for (sent = 0; !stop && sent < n; sent += k) { + if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1; + } + } + DBG(("%s", "FORWARED EVERYTHING TO CGI")); + CloseHandle(tp->hPipe); + free(tp); + _endthread(); + return NULL; +} + +static void *pull_from_stdout(void *arg) { + struct threadparam *tp = arg; + int k, stop = 0; + DWORD n, sent; + char buf[IOBUF_SIZE]; + + while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) { + for (sent = 0; !stop && sent < n; sent += k) { + if (wait_until_ready(tp->s, 0) && + (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1; + } + } + DBG(("%s", "EOF FROM CGI")); + CloseHandle(tp->hPipe); + shutdown(tp->s, 2); // Without this, IO thread may get truncated data + closesocket(tp->s); + free(tp); + _endthread(); + return NULL; +} + +static void spawn_stdio_thread(sock_t sock, HANDLE hPipe, + void *(*func)(void *)) { + struct threadparam *tp = malloc(sizeof(*tp)); + if (tp != NULL) { + tp->s = sock; + tp->hPipe = hPipe; + mg_start_thread(func, tp); + } +} + +static void abs_path(const char *utf8_path, char *abs_path, size_t len) { + wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE]; + to_wchar(utf8_path, buf, ARRAY_SIZE(buf)); + GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL); + WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0); +} + +static pid_t start_process(char *interp, const char *cmd, const char *env, + const char *envp[], const char *dir, sock_t sock) { + STARTUPINFOW si = {0}; + PROCESS_INFORMATION pi = {0}; + HANDLE a[2], b[2], me = GetCurrentProcess(); + wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE]; + char buf[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE], + cmdline[MAX_PATH_SIZE], *p; + DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS; + FILE *fp; + + si.cb = sizeof(si); + si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; + si.wShowWindow = SW_HIDE; + si.hStdError = GetStdHandle(STD_ERROR_HANDLE); + + CreatePipe(&a[0], &a[1], NULL, 0); + CreatePipe(&b[0], &b[1], NULL, 0); + DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags); + DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags); + + if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) { + buf[0] = buf[1] = '\0'; + fgets(buf, sizeof(buf), fp); + buf[sizeof(buf) - 1] = '\0'; + if (buf[0] == '#' && buf[1] == '!') { + interp = buf + 2; + for (p = interp + strlen(interp); + isspace(* (uint8_t *) p) && p > interp; p--) *p = '\0'; + } + fclose(fp); + } + + if (interp != NULL) { + abs_path(interp, buf4, ARRAY_SIZE(buf4)); + interp = buf4; + } + abs_path(dir, buf5, ARRAY_SIZE(buf5)); + to_wchar(dir, full_dir, ARRAY_SIZE(full_dir)); + mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\"", + interp ? interp : "", interp ? " " : "", cmd); + to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd)); + + if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP, + (void *) env, full_dir, &si, &pi) != 0) { + spawn_stdio_thread(sock, a[1], push_to_stdin); + spawn_stdio_thread(sock, b[0], pull_from_stdout); + } else { + CloseHandle(a[1]); + CloseHandle(b[0]); + closesocket(sock); + } + DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess)); + + CloseHandle(si.hStdOutput); + CloseHandle(si.hStdInput); + CloseHandle(a[0]); + CloseHandle(b[1]); + CloseHandle(pi.hThread); + CloseHandle(pi.hProcess); + + return pi.hProcess; +} +#else +static pid_t start_process(const char *interp, const char *cmd, const char *env, + const char *envp[], const char *dir, sock_t sock) { + char buf[500]; + pid_t pid = fork(); + (void) env; + + if (pid == 0) { + (void) chdir(dir); + (void) dup2(sock, 0); + (void) dup2(sock, 1); + closesocket(sock); + + // After exec, all signal handlers are restored to their default values, + // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's + // implementation, SIGCHLD's handler will leave unchanged after exec + // if it was set to be ignored. Restore it to default action. + signal(SIGCHLD, SIG_DFL); + + if (interp == NULL) { + execle(cmd, cmd, NULL, envp); + } else { + execle(interp, interp, cmd, NULL, envp); + } + snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n" + "500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp, + interp == NULL ? "" : " ", cmd, strerror(errno)); + send(1, buf, strlen(buf), 0); + exit(EXIT_FAILURE); // exec call failed + } + + return pid; +} +#endif // _WIN32 + +// This structure helps to create an environment for the spawned CGI program. +// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, +// last element must be NULL. +// However, on Windows there is a requirement that all these VARIABLE=VALUE\0 +// strings must reside in a contiguous buffer. The end of the buffer is +// marked by two '\0' characters. +// We satisfy both worlds: we create an envp array (which is vars), all +// entries are actually pointers inside buf. +struct cgi_env_block { + struct mg_connection *conn; + char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer + const char *vars[MAX_CGI_ENVIR_VARS]; // char *envp[] + int len; // Space taken + int nvars; // Number of variables in envp[] +}; + +// Append VARIABLE=VALUE\0 string to the buffer, and add a respective +// pointer into the vars array. +static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { + int n, space; + char *added; + va_list ap; + + // Calculate how much space is left in the buffer + space = sizeof(block->buf) - block->len - 2; + assert(space >= 0); + + // Make a pointer to the free space int the buffer + added = block->buf + block->len; + + // Copy VARIABLE=VALUE\0 string into the free space + va_start(ap, fmt); + n = mg_vsnprintf(added, (size_t) space, fmt, ap); + va_end(ap); + + // Make sure we do not overflow buffer and the envp array + if (n > 0 && n + 1 < space && + block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { + // Append a pointer to the added string into the envp array + block->vars[block->nvars++] = added; + // Bump up used length counter. Include \0 terminator + block->len += n + 1; + } + + return added; +} + +static void addenv2(struct cgi_env_block *blk, const char *name) { + const char *s; + if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s); +} + +static void prepare_cgi_environment(struct connection *conn, + const char *prog, + struct cgi_env_block *blk) { + struct mg_connection *ri = &conn->mg_conn; + const char *s, *slash; + char *p, **opts = conn->server->config_options; + int i; + + blk->len = blk->nvars = 0; + blk->conn = ri; + + if ((s = getenv("SERVER_NAME")) != NULL) { + addenv(blk, "SERVER_NAME=%s", s); + } else { + addenv(blk, "SERVER_NAME=%s", conn->server->local_ip); + } + addenv(blk, "SERVER_ROOT=%s", opts[DOCUMENT_ROOT]); + addenv(blk, "DOCUMENT_ROOT=%s", opts[DOCUMENT_ROOT]); + addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MONGOOSE_VERSION); + + // Prepare the environment block + addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); + addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); + addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP + + // TODO(lsm): fix this for IPv6 case + //addenv(blk, "SERVER_PORT=%d", ri->remote_port); + + addenv(blk, "REQUEST_METHOD=%s", ri->request_method); + addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip); + addenv(blk, "REMOTE_PORT=%d", ri->remote_port); + addenv(blk, "REQUEST_URI=%s%s%s", ri->uri, + ri->query_string == NULL ? "" : "?", + ri->query_string == NULL ? "" : ri->query_string); + + // SCRIPT_NAME + if (conn->path_info != NULL) { + addenv(blk, "SCRIPT_NAME=%.*s", + (int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri); + addenv(blk, "PATH_INFO=%s", conn->path_info); + } else { + s = strrchr(prog, '/'); + slash = strrchr(ri->uri, '/'); + addenv(blk, "SCRIPT_NAME=%.*s%s", + slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri, + s == NULL ? prog : s); + } + + addenv(blk, "SCRIPT_FILENAME=%s", prog); + addenv(blk, "PATH_TRANSLATED=%s", prog); +#ifdef MONGOOSE_USE_SSL + addenv(blk, "HTTPS=%s", conn->ssl != NULL ? "on" : "off"); +#else + addenv(blk, "HTTPS=%s", "off"); +#endif + + if ((s = mg_get_header(ri, "Content-Type")) != NULL) + addenv(blk, "CONTENT_TYPE=%s", s); + + if (ri->query_string != NULL) + addenv(blk, "QUERY_STRING=%s", ri->query_string); + + if ((s = mg_get_header(ri, "Content-Length")) != NULL) + addenv(blk, "CONTENT_LENGTH=%s", s); + + addenv2(blk, "PATH"); + addenv2(blk, "TMP"); + addenv2(blk, "TEMP"); + addenv2(blk, "TMPDIR"); + addenv2(blk, "PERLLIB"); + addenv2(blk, ENV_EXPORT_TO_CGI); + +#if defined(_WIN32) + addenv2(blk, "COMSPEC"); + addenv2(blk, "SYSTEMROOT"); + addenv2(blk, "SystemDrive"); + addenv2(blk, "ProgramFiles"); + addenv2(blk, "ProgramFiles(x86)"); + addenv2(blk, "CommonProgramFiles(x86)"); +#else + addenv2(blk, "LD_LIBRARY_PATH"); +#endif // _WIN32 + + // Add all headers as HTTP_* variables + for (i = 0; i < ri->num_headers; i++) { + p = addenv(blk, "HTTP_%s=%s", + ri->http_headers[i].name, ri->http_headers[i].value); + + // Convert variable name into uppercase, and change - to _ + for (; *p != '=' && *p != '\0'; p++) { + if (*p == '-') + *p = '_'; + *p = (char) toupper(* (unsigned char *) p); + } + } + + blk->vars[blk->nvars++] = NULL; + blk->buf[blk->len++] = '\0'; + + assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); + assert(blk->len > 0); + assert(blk->len < (int) sizeof(blk->buf)); +} + +static const char cgi_status[] = "HTTP/1.1 200 OK\r\n"; + +static void open_cgi_endpoint(struct connection *conn, const char *prog) { + struct cgi_env_block blk; + char dir[MAX_PATH_SIZE], *p; + sock_t fds[2]; + + prepare_cgi_environment(conn, prog, &blk); + // CGI must be executed in its own directory. 'dir' must point to the + // directory containing executable program, 'p' must point to the + // executable program name relative to 'dir'. + if ((p = strrchr(prog, '/')) == NULL) { + mg_snprintf(dir, sizeof(dir), "%s", "."); + } else { + mg_snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog); + } + + // Try to create socketpair in a loop until success. mg_socketpair() + // can be interrupted by a signal and fail. + // TODO(lsm): use sigaction to restart interrupted syscall + do { + mg_socketpair(fds); + } while (fds[0] == INVALID_SOCKET); + + if (start_process(conn->server->config_options[CGI_INTERPRETER], + prog, blk.buf, blk.vars, dir, fds[1]) > 0) { + conn->endpoint_type = EP_CGI; + conn->endpoint.cgi_sock = fds[0]; + spool(&conn->remote_iobuf, cgi_status, sizeof(cgi_status) - 1); + conn->mg_conn.status_code = 200; + conn->flags |= CONN_BUFFER; + } else { + closesocket(fds[0]); + send_http_error(conn, 500, "start_process(%s) failed", prog); + } + +#ifndef _WIN32 + closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket +#endif +} + +static void read_from_cgi(struct connection *conn) { + struct iobuf *io = &conn->remote_iobuf; + char buf[IOBUF_SIZE], buf2[sizeof(buf)], *s = buf2; + const char *status = "500"; + struct mg_connection c; + int len, s_len = sizeof(cgi_status) - 1, + n = recv(conn->endpoint.cgi_sock, buf, sizeof(buf), 0); + + DBG(("%p %d", conn, n)); + if (is_error(n)) { + close_local_endpoint(conn); + } else if (n > 0) { + spool(&conn->remote_iobuf, buf, n); + if (conn->flags & CONN_BUFFER) { + len = get_request_len(io->buf + s_len, io->len - s_len); + if (len == 0) return; + if (len > 0) { + memset(&c, 0, sizeof(c)); + memcpy(buf2, io->buf + s_len, len); + buf2[len - 1] = '\0'; + parse_http_headers(&s, &c); + if (mg_get_header(&c, "Location") != NULL) { + status = "302"; + } else if ((status = (char *) mg_get_header(&c, "Status")) == NULL) { + status = "200"; + } + } + memcpy(io->buf + 9, status, 3); + conn->mg_conn.status_code = atoi(status); + conn->flags &= ~CONN_BUFFER; + } + } +} + +static void forward_post_data(struct connection *conn) { + struct iobuf *io = &conn->local_iobuf; + int n = send(conn->endpoint.cgi_sock, io->buf, io->len, 0); + discard_leading_iobuf_bytes(io, n); +} +#endif // !MONGOOSE_NO_CGI + +// 'sa' must be an initialized address to bind to +static sock_t open_listening_socket(union socket_address *sa) { + socklen_t len = sizeof(*sa); + sock_t on = 1, sock = INVALID_SOCKET; + + if ((sock = socket(sa->sa.sa_family, SOCK_STREAM, 6)) != INVALID_SOCKET && + !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && + !bind(sock, &sa->sa, sa->sa.sa_family == AF_INET ? + sizeof(sa->sin) : sizeof(sa->sa)) && + !listen(sock, SOMAXCONN)) { + set_non_blocking_mode(sock); + // In case port was set to 0, get the real port number + (void) getsockname(sock, &sa->sa, &len); + } else if (sock != INVALID_SOCKET) { + closesocket(sock); + sock = INVALID_SOCKET; + } + + return sock; +} + +static char *mg_strdup(const char *str) { + char *copy = (char *) malloc(strlen(str) + 1); + if (copy != NULL) { + strcpy(copy, str); + } + return copy; +} + +static int isbyte(int n) { + return n >= 0 && n <= 255; +} + +static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { + int n, a, b, c, d, slash = 32, len = 0; + + if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || + sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && + isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && + slash >= 0 && slash < 33) { + len = n; + *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; + *mask = slash ? 0xffffffffU << (32 - slash) : 0; + } + + return len; +} + +// Verify given socket address against the ACL. +// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. +static int check_acl(const char *acl, uint32_t remote_ip) { + int allowed, flag; + uint32_t net, mask; + struct vec vec; + + // If any ACL is set, deny by default + allowed = acl == NULL ? '+' : '-'; + + while ((acl = next_option(acl, &vec, NULL)) != NULL) { + flag = vec.ptr[0]; + if ((flag != '+' && flag != '-') || + parse_net(&vec.ptr[1], &net, &mask) == 0) { + return -1; + } + + if (net == (remote_ip & mask)) { + allowed = flag; + } + } + + return allowed == '+'; +} + +static void sockaddr_to_string(char *buf, size_t len, + const union socket_address *usa) { + buf[0] = '\0'; +#if defined(MONGOOSE_USE_IPV6) + inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? + (void *) &usa->sin.sin_addr : + (void *) &usa->sin6.sin6_addr, buf, len); +#elif defined(_WIN32) + // Only Windoze Vista (and newer) have inet_ntop() + strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); +#else + inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); +#endif +} + +static struct connection *accept_new_connection(struct mg_server *server) { + union socket_address sa; + socklen_t len = sizeof(sa); + sock_t sock = INVALID_SOCKET; + struct connection *conn = NULL; + + // NOTE(lsm): on Windows, sock is always > FD_SETSIZE + if ((sock = accept(server->listening_sock, &sa.sa, &len)) == INVALID_SOCKET) { + } else if (!check_acl(server->config_options[ACCESS_CONTROL_LIST], + ntohl(* (uint32_t *) &sa.sin.sin_addr))) { + // NOTE(lsm): check_acl doesn't work for IPv6 + closesocket(sock); + } else if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) { + closesocket(sock); +#ifdef MONGOOSE_USE_SSL + } else if (server->ssl_ctx != NULL && + ((conn->ssl = SSL_new(server->ssl_ctx)) == NULL || + SSL_set_fd(conn->ssl, sock) != 1)) { + DBG(("SSL error")); + closesocket(sock); + free(conn); + conn = NULL; +#endif + } else { + set_close_on_exec(sock); + set_non_blocking_mode(sock); + conn->server = server; + conn->client_sock = sock; + sockaddr_to_string(conn->mg_conn.remote_ip, + sizeof(conn->mg_conn.remote_ip), &sa); + conn->mg_conn.remote_port = ntohs(sa.sin.sin_port); + conn->mg_conn.server_param = server->server_data; + conn->mg_conn.local_ip = server->local_ip; + conn->mg_conn.local_port = ntohs(server->lsa.sin.sin_port); + LINKED_LIST_ADD_TO_FRONT(&server->active_connections, &conn->link); + DBG(("added conn %p", conn)); + } + + return conn; +} + +static void close_conn(struct connection *conn) { + LINKED_LIST_REMOVE(&conn->link); + closesocket(conn->client_sock); + close_local_endpoint(conn); + + if (conn->server->http_close_handler) + conn->server->http_close_handler(&conn->mg_conn); + + DBG(("%p %d %d", conn, conn->flags, conn->endpoint_type)); + free(conn->request); // It's OK to free(NULL), ditto below + free(conn->path_info); + free(conn->remote_iobuf.buf); + free(conn->local_iobuf.buf); +#ifdef MONGOOSE_USE_SSL + if (conn->ssl != NULL) SSL_free(conn->ssl); +#endif + free(conn); +} + +// Protect against directory disclosure attack by removing '..', +// excessive '/' and '\' characters +static void remove_double_dots_and_double_slashes(char *s) { + char *p = s; + + while (*s != '\0') { + *p++ = *s++; + if (s[-1] == '/' || s[-1] == '\\') { + // Skip all following slashes, backslashes and double-dots + while (s[0] != '\0') { + if (s[0] == '/' || s[0] == '\\') { s++; } + else if (s[0] == '.' && s[1] == '.') { s += 2; } + else { break; } + } + } + } + *p = '\0'; +} + +int mg_url_decode(const char *src, int src_len, char *dst, + int dst_len, int is_form_url_encoded) { + int i, j, a, b; +#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') + + for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { + if (src[i] == '%' && i < src_len - 2 && + isxdigit(* (const unsigned char *) (src + i + 1)) && + isxdigit(* (const unsigned char *) (src + i + 2))) { + a = tolower(* (const unsigned char *) (src + i + 1)); + b = tolower(* (const unsigned char *) (src + i + 2)); + dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); + i += 2; + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } + + dst[j] = '\0'; // Null-terminate the destination + + return i >= src_len ? j : -1; +} + +static int is_valid_http_method(const char *method) { + return !strcmp(method, "GET") || !strcmp(method, "POST") || + !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || + !strcmp(method, "PUT") || !strcmp(method, "DELETE") || + !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND") + || !strcmp(method, "MKCOL"); +} + +// Parse HTTP request, fill in mg_request structure. +// This function modifies the buffer by NUL-terminating +// HTTP request components, header names and header values. +// Note that len must point to the last \n of HTTP headers. +static int parse_http_message(char *buf, int len, struct mg_connection *ri) { + int is_request, n; + + // Reset the connection. Make sure that we don't touch fields that are + // set elsewhere: remote_ip, remote_port, server_param + ri->request_method = ri->uri = ri->http_version = ri->query_string = NULL; + ri->num_headers = ri->status_code = ri->is_websocket = ri->content_len = 0; + + buf[len - 1] = '\0'; + + // RFC says that all initial whitespaces should be ingored + while (*buf != '\0' && isspace(* (unsigned char *) buf)) { + buf++; + } + ri->request_method = skip(&buf, " "); + ri->uri = skip(&buf, " "); + ri->http_version = skip(&buf, "\r\n"); + + // HTTP message could be either HTTP request or HTTP response, e.g. + // "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..." + is_request = is_valid_http_method(ri->request_method); + if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) || + (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) { + len = -1; + } else { + if (is_request) { + ri->http_version += 5; + } + parse_http_headers(&buf, ri); + + if ((ri->query_string = strchr(ri->uri, '?')) != NULL) { + *(char *) ri->query_string++ = '\0'; + } + n = (int) strlen(ri->uri); + mg_url_decode(ri->uri, n, (char *) ri->uri, n + 1, 0); + remove_double_dots_and_double_slashes((char *) ri->uri); + } + + return len; +} + +static int lowercase(const char *s) { + return tolower(* (const unsigned char *) s); +} + +static int mg_strcasecmp(const char *s1, const char *s2) { + int diff; + + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0'); + + return diff; +} + +static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { + int diff = 0; + + if (len > 0) + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0' && --len > 0); + + return diff; +} + +// Return HTTP header value, or NULL if not found. +const char *mg_get_header(const struct mg_connection *ri, const char *s) { + int i; + + for (i = 0; i < ri->num_headers; i++) + if (!mg_strcasecmp(s, ri->http_headers[i].name)) + return ri->http_headers[i].value; + + return NULL; +} + +#ifndef MONGOOSE_NO_FILESYSTEM +// Perform case-insensitive match of string against pattern +static int match_prefix(const char *pattern, int pattern_len, const char *str) { + const char *or_str; + int len, res, i = 0, j = 0; + + if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { + res = match_prefix(pattern, or_str - pattern, str); + return res > 0 ? res : + match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); + } + + for (; i < pattern_len; i++, j++) { + if (pattern[i] == '?' && str[j] != '\0') { + continue; + } else if (pattern[i] == '$') { + return str[j] == '\0' ? j : -1; + } else if (pattern[i] == '*') { + i++; + if (pattern[i] == '*') { + i++; + len = (int) strlen(str + j); + } else { + len = (int) strcspn(str + j, "/"); + } + if (i == pattern_len) { + return j + len; + } + do { + res = match_prefix(pattern + i, pattern_len - i, str + j + len); + } while (res == -1 && len-- > 0); + return res == -1 ? -1 : j + res + len; + } else if (lowercase(&pattern[i]) != lowercase(&str[j])) { + return -1; + } + } + return j; +} + +static int must_hide_file(struct connection *conn, const char *path) { + const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; + const char *pattern = conn->server->config_options[HIDE_FILES_PATTERN]; + return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 || + (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0); +} + +// Return 1 if real file has been found, 0 otherwise +static int convert_uri_to_file_name(struct connection *conn, char *buf, + size_t buf_len, file_stat_t *st) { + struct vec a, b; + const char *rewrites = conn->server->config_options[URL_REWRITES]; + const char *root = conn->server->config_options[DOCUMENT_ROOT]; +#ifndef MONGOOSE_NO_CGI + const char *cgi_pat = conn->server->config_options[CGI_PATTERN]; + char *p; +#endif + const char *uri = conn->mg_conn.uri; + int match_len; + + // No filesystem access + if (root == NULL) return 0; + + // Handle URL rewrites + mg_snprintf(buf, buf_len, "%s%s", root, uri); + while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { + if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { + mg_snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.ptr, uri + match_len); + break; + } + } + + if (stat(buf, st) == 0) return 1; + +#ifndef MONGOOSE_NO_CGI + // Support PATH_INFO for CGI scripts. + for (p = buf + strlen(root) + 2; *p != '\0'; p++) { + if (*p == '/') { + *p = '\0'; + if (match_prefix(cgi_pat, strlen(cgi_pat), buf) > 0 && !stat(buf, st)) { + DBG(("!!!! [%s]", buf)); + *p = '/'; + conn->path_info = mg_strdup(p); + *p = '\0'; + return 1; + } + *p = '/'; + } + } +#endif + + return 0; +} +#endif // MONGOOSE_NO_FILESYSTEM + +static int should_keep_alive(const struct mg_connection *conn) { + const char *method = conn->request_method; + const char *http_version = conn->http_version; + const char *header = mg_get_header(conn, "Connection"); + return method != NULL && (!strcmp(method, "GET") || + ((struct connection *) conn)->endpoint_type == EP_USER) && + ((header != NULL && !mg_strcasecmp(header, "keep-alive")) || + (header == NULL && http_version && !strcmp(http_version, "1.1"))); +} + +int mg_write(struct mg_connection *c, const void *buf, int len) { + return spool(&((struct connection *) c)->remote_iobuf, buf, len); +} + +void mg_send_status(struct mg_connection *c, int status) { + if (c->status_code == 0) { + c->status_code = status; + mg_printf(c, "HTTP/1.1 %d %s\r\n", status, status_code_to_str(status)); + } +} + +void mg_send_header(struct mg_connection *c, const char *name, const char *v) { + if (c->status_code == 0) { + c->status_code = 200; + mg_printf(c, "HTTP/1.1 %d %s\r\n", 200, status_code_to_str(200)); + } + mg_printf(c, "%s: %s\r\n", name, v); +} + +static void terminate_headers(struct mg_connection *c) { + struct connection *conn = (struct connection *) c; + if (!(conn->flags & CONN_HEADERS_SENT)) { + mg_send_header(c, "Transfer-Encoding", "chunked"); + mg_write(c, "\r\n", 2); + conn->flags |= CONN_HEADERS_SENT; + } +} + +void mg_send_data(struct mg_connection *c, const void *data, int data_len) { + terminate_headers(c); + write_chunk((struct connection *) c, (const char *) data, data_len); +} + +void mg_printf_data(struct mg_connection *c, const char *fmt, ...) { + va_list ap; + + terminate_headers(c); + + va_start(ap, fmt); + mg_vprintf(c, fmt, ap, 1); + va_end(ap); +} + +#if !defined(MONGOOSE_NO_WEBSOCKET) || !defined(MONGOOSE_NO_AUTH) +static int is_big_endian(void) { + static const int n = 1; + return ((char *) &n)[0] == 0; +} +#endif + +#ifndef MONGOOSE_NO_WEBSOCKET +// START OF SHA-1 code +// Copyright(c) By Steve Reid +#define SHA1HANDSOFF +#if defined(__sun) +#include "solarisfixes.h" +#endif + +union char64long16 { unsigned char c[64]; uint32_t l[16]; }; + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { + // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN + if (!is_big_endian()) { + block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | + (rol(block->l[i], 8) & 0x00FF00FF); + } + return block->l[i]; +} + +#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ + ^block->l[(i+2)&15]^block->l[i&15],1)) +#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); +#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); +#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); + +typedef struct { + uint32_t state[5]; + uint32_t count[2]; + unsigned char buffer[64]; +} SHA1_CTX; + +static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); + R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); + R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); + R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); + R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); + R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); + R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); + R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); + R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); + R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); + R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); + R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); + R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); + R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); + R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); + R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); + R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); + R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); + R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); + R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + // Erase working structures. The order of operations is important, + // used to ensure that compiler doesn't optimize those out. + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; (void) b; (void) c; (void) d; (void) e; +} + +static void SHA1Init(SHA1_CTX* context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; +} + +static void SHA1Update(SHA1_CTX* context, const unsigned char* data, + uint32_t len) { + uint32_t i, j; + + j = context->count[0]; + if ((context->count[0] += len << 3) < j) + context->count[1]++; + context->count[1] += (len>>29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64-j)); + SHA1Transform(context->state, context->buffer); + for ( ; i + 63 < len; i += 64) { + SHA1Transform(context->state, &data[i]); + } + j = 0; + } + else i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} + +static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] + >> ((3-(i & 3)) * 8) ) & 255); + } + c = 0200; + SHA1Update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + SHA1Update(context, &c, 1); + } + SHA1Update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = (unsigned char) + ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} +// END OF SHA1 CODE + +static void base64_encode(const unsigned char *src, int src_len, char *dst) { + static const char *b64 = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + int i, j, a, b, c; + + for (i = j = 0; i < src_len; i += 3) { + a = src[i]; + b = i + 1 >= src_len ? 0 : src[i + 1]; + c = i + 2 >= src_len ? 0 : src[i + 2]; + + dst[j++] = b64[a >> 2]; + dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; + if (i + 1 < src_len) { + dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; + } + if (i + 2 < src_len) { + dst[j++] = b64[c & 63]; + } + } + while (j % 4 != 0) { + dst[j++] = '='; + } + dst[j++] = '\0'; +} + +static void send_websocket_handshake(struct mg_connection *conn, + const char *key) { + static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; + char buf[500], sha[20], b64_sha[sizeof(sha) * 2]; + SHA1_CTX sha_ctx; + + mg_snprintf(buf, sizeof(buf), "%s%s", key, magic); + SHA1Init(&sha_ctx); + SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); + SHA1Final((unsigned char *) sha, &sha_ctx); + base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); + mg_snprintf(buf, sizeof(buf), "%s%s%s", + "HTTP/1.1 101 Switching Protocols\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n" + "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); + + mg_write(conn, buf, strlen(buf)); +} + +static int deliver_websocket_frame(struct connection *conn) { + // Having buf unsigned char * is important, as it is used below in arithmetic + unsigned char *buf = (unsigned char *) conn->local_iobuf.buf; + int i, len, buf_len = conn->local_iobuf.len, frame_len = 0, + mask_len = 0, header_len = 0, data_len = 0, buffered = 0; + + if (buf_len >= 2) { + len = buf[1] & 127; + mask_len = buf[1] & 128 ? 4 : 0; + if (len < 126 && buf_len >= mask_len) { + data_len = len; + header_len = 2 + mask_len; + } else if (len == 126 && buf_len >= 4 + mask_len) { + header_len = 4 + mask_len; + data_len = ((((int) buf[2]) << 8) + buf[3]); + } else if (buf_len >= 10 + mask_len) { + header_len = 10 + mask_len; + data_len = (int) (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) + + htonl(* (uint32_t *) &buf[6]); + } + } + + frame_len = header_len + data_len; + buffered = frame_len > 0 && frame_len <= buf_len; + + if (buffered) { + conn->mg_conn.content_len = data_len; + conn->mg_conn.content = (char *) buf + header_len; + conn->mg_conn.wsbits = buf[0]; + + // Apply mask if necessary + if (mask_len > 0) { + for (i = 0; i < data_len; i++) { + buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4]; + } + } + + // Call the handler and remove frame from the iobuf + if (conn->server->request_handler(&conn->mg_conn) == MG_CLIENT_CLOSE) { + conn->flags |= CONN_SPOOL_DONE; + } + discard_leading_iobuf_bytes(&conn->local_iobuf, frame_len); + } + + return buffered; +} + +int mg_websocket_write(struct mg_connection* conn, int opcode, + const char *data, size_t data_len) { + unsigned char *copy; + size_t copy_len = 0; + int retval = -1; + + if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) { + return -1; + } + + copy[0] = 0x80 + (opcode & 0x0f); + + // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 + if (data_len < 126) { + // Inline 7-bit length field + copy[1] = data_len; + memcpy(copy + 2, data, data_len); + copy_len = 2 + data_len; + } else if (data_len <= 0xFFFF) { + // 16-bit length field + copy[1] = 126; + * (uint16_t *) (copy + 2) = (uint16_t) htons((uint16_t) data_len); + memcpy(copy + 4, data, data_len); + copy_len = 4 + data_len; + } else { + // 64-bit length field + copy[1] = 127; + * (uint32_t *) (copy + 2) = (uint32_t) + htonl((uint32_t) ((uint64_t) data_len >> 32)); + * (uint32_t *) (copy + 6) = (uint32_t) htonl(data_len & 0xffffffff); + memcpy(copy + 10, data, data_len); + copy_len = 10 + data_len; + } + + if (copy_len > 0) { + retval = mg_write(conn, copy, copy_len); + } + free(copy); + + return retval; +} + +static void send_websocket_handshake_if_requested(struct mg_connection *conn) { + const char *ver = mg_get_header(conn, "Sec-WebSocket-Version"), + *key = mg_get_header(conn, "Sec-WebSocket-Key"); + if (ver != NULL && key != NULL) { + conn->is_websocket = 1; + send_websocket_handshake(conn, key); + } +} + +static void ping_idle_websocket_connection(struct connection *conn, time_t t) { + if (t - conn->last_activity_time > MONGOOSE_USE_WEBSOCKET_PING_INTERVAL) { + mg_websocket_write(&conn->mg_conn, 0x9, "", 0); + } +} +#else +#define ping_idle_websocket_connection(conn, t) +#endif // !MONGOOSE_NO_WEBSOCKET + +static void write_terminating_chunk(struct connection *conn) { + mg_write(&conn->mg_conn, "0\r\n\r\n", 5); +} + +static int call_request_handler(struct connection *conn) { + int result; + conn->mg_conn.content = conn->local_iobuf.buf; + switch ((result = conn->server->request_handler(&conn->mg_conn))) { + case MG_REQUEST_CALL_AGAIN: conn->flags |= CONN_LONG_RUNNING; break; + case MG_REQUEST_NOT_PROCESSED: break; + default: + if (conn->flags & CONN_HEADERS_SENT) { + write_terminating_chunk(conn); + } + close_local_endpoint(conn); + break; + } + return result; +} + +static void callback_http_client_on_connect(struct connection *conn) { + int ok = 1, ret; + socklen_t len = sizeof(ok); + + conn->flags &= ~CONN_CONNECTING; + ret = getsockopt(conn->client_sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len); +#ifdef MONGOOSE_USE_SSL + if (ret == 0 && ok == 0 && conn->ssl != NULL) { + int res = SSL_connect(conn->ssl), ssl_err = SSL_get_error(conn->ssl, res); + //DBG(("%p res %d %d", conn, res, ssl_err)); + if (res == 1) { + conn->flags = CONN_SSL_HANDS_SHAKEN; + } else if (res == 0 || ssl_err == 2 || ssl_err == 3) { + conn->flags |= CONN_CONNECTING; + return; // Call us again + } else { + ok = 1; + } + } +#endif + conn->mg_conn.status_code = + (ret == 0 && ok == 0) ? MG_CONNECT_SUCCESS : MG_CONNECT_FAILURE; + if (conn->handler(&conn->mg_conn) || ok != 0) { + conn->flags |= CONN_CLOSE; + } +} + +#ifdef MONGOOSE_HEXDUMP +static void hexdump(const struct connection *conn, const void *buf, + int len, const char *marker) { + const unsigned char *p = (const unsigned char *) buf; + char path[MAX_PATH_SIZE], date[100], ascii[17]; + FILE *fp; + + if (!match_prefix(MONGOOSE_HEXDUMP, strlen(MONGOOSE_HEXDUMP), + conn->mg_conn.remote_ip)) { + return; + } + + snprintf(path, sizeof(path), "%s.%hu.txt", + conn->mg_conn.remote_ip, conn->mg_conn.remote_port); + + if ((fp = fopen(path, "a")) != NULL) { + time_t cur_time = time(NULL); + int i, idx; + + strftime(date, sizeof(date), "%d/%b/%Y %H:%M:%S", localtime(&cur_time)); + fprintf(fp, "%s %s %d bytes\n", marker, date, len); + + for (i = 0; i < len; i++) { + idx = i % 16; + if (idx == 0) { + if (i > 0) fprintf(fp, " %s\n", ascii); + fprintf(fp, "%04x ", i); + } + fprintf(fp, " %02x", p[i]); + ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; + ascii[idx + 1] = '\0'; + } + + while (i++ % 16) fprintf(fp, "%s", " "); + fprintf(fp, " %s\n\n", ascii); + + fclose(fp); + } +} +#endif + +static void write_to_socket(struct connection *conn) { + struct iobuf *io = &conn->remote_iobuf; + int n = 0; + + if (conn->endpoint_type == EP_CLIENT && conn->flags & CONN_CONNECTING) { + callback_http_client_on_connect(conn); + return; + } + +#ifdef MONGOOSE_USE_SSL + if (conn->ssl != NULL) { + n = SSL_write(conn->ssl, io->buf, io->len); + } else +#endif + { n = send(conn->client_sock, io->buf, io->len, 0); } + + DBG(("%p Written %d of %d(%d): [%.*s ...]", + conn, n, io->len, io->size, io->len < 40 ? io->len : 40, io->buf)); + +#ifdef MONGOOSE_HEXDUMP + hexdump(conn, io->buf, n, "->"); +#endif + + if (is_error(n)) { + conn->flags |= CONN_CLOSE; + } else if (n > 0) { + discard_leading_iobuf_bytes(io, n); + conn->num_bytes_sent += n; + } + + if (io->len == 0 && conn->flags & CONN_SPOOL_DONE) { + conn->flags |= CONN_CLOSE; + } +} + +const char *mg_get_mime_type(const char *path, const char *default_mime_type) { + const char *ext; + size_t i, path_len; + + path_len = strlen(path); + + for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) { + ext = path + (path_len - static_builtin_mime_types[i].ext_len); + if (path_len > static_builtin_mime_types[i].ext_len && + mg_strcasecmp(ext, static_builtin_mime_types[i].extension) == 0) { + return static_builtin_mime_types[i].mime_type; + } + } + + return default_mime_type; +} + +#ifndef MONGOOSE_NO_FILESYSTEM +// Convert month to the month number. Return -1 on error, or month number +static int get_month_index(const char *s) { + static const char *month_names[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + int i; + + for (i = 0; i < (int) ARRAY_SIZE(month_names); i++) + if (!strcmp(s, month_names[i])) + return i; + + return -1; +} + +static int num_leap_years(int year) { + return year / 4 - year / 100 + year / 400; +} + +// Parse UTC date-time string, and return the corresponding time_t value. +static time_t parse_date_string(const char *datetime) { + static const unsigned short days_before_month[] = { + 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 + }; + char month_str[32]; + int second, minute, hour, day, month, year, leap_days, days; + time_t result = (time_t) 0; + + if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%d %3s %d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%d-%3s-%d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6)) && + year > 1970 && + (month = get_month_index(month_str)) != -1) { + leap_days = num_leap_years(year) - num_leap_years(1970); + year -= 1970; + days = year * 365 + days_before_month[month] + (day - 1) + leap_days; + result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; + } + + return result; +} + +// Look at the "path" extension and figure what mime type it has. +// Store mime type in the vector. +static void get_mime_type(const struct mg_server *server, const char *path, + struct vec *vec) { + struct vec ext_vec, mime_vec; + const char *list, *ext; + size_t path_len; + + path_len = strlen(path); + + // Scan user-defined mime types first, in case user wants to + // override default mime types. + list = server->config_options[EXTRA_MIME_TYPES]; + while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { + // ext now points to the path suffix + ext = path + path_len - ext_vec.len; + if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { + *vec = mime_vec; + return; + } + } + + vec->ptr = mg_get_mime_type(path, "text/plain"); + vec->len = strlen(vec->ptr); +} + +static const char *suggest_connection_header(const struct mg_connection *conn) { + return should_keep_alive(conn) ? "keep-alive" : "close"; +} + +static void construct_etag(char *buf, size_t buf_len, const file_stat_t *st) { + mg_snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", + (unsigned long) st->st_mtime, (int64_t) st->st_size); +} + +// Return True if we should reply 304 Not Modified. +static int is_not_modified(const struct connection *conn, + const file_stat_t *stp) { + char etag[64]; + const char *ims = mg_get_header(&conn->mg_conn, "If-Modified-Since"); + const char *inm = mg_get_header(&conn->mg_conn, "If-None-Match"); + construct_etag(etag, sizeof(etag), stp); + return (inm != NULL && !mg_strcasecmp(etag, inm)) || + (ims != NULL && stp->st_mtime <= parse_date_string(ims)); +} + +// For given directory path, substitute it to valid index file. +// Return 0 if index file has been found, -1 if not found. +// If the file is found, it's stats is returned in stp. +static int find_index_file(struct connection *conn, char *path, + size_t path_len, file_stat_t *stp) { + const char *list = conn->server->config_options[INDEX_FILES]; + file_stat_t st; + struct vec filename_vec; + size_t n = strlen(path), found = 0; + + // The 'path' given to us points to the directory. Remove all trailing + // directory separator characters from the end of the path, and + // then append single directory separator character. + while (n > 0 && path[n - 1] == '/') { + n--; + } + path[n] = '/'; + + // Traverse index files list. For each entry, append it to the given + // path and see if the file exists. If it exists, break the loop + while ((list = next_option(list, &filename_vec, NULL)) != NULL) { + + // Ignore too long entries that may overflow path buffer + if (filename_vec.len > (int) (path_len - (n + 2))) + continue; + + // Prepare full path to the index file + strncpy(path + n + 1, filename_vec.ptr, filename_vec.len); + path[n + 1 + filename_vec.len] = '\0'; + + //DBG(("[%s]", path)); + + // Does it exist? + if (!stat(path, &st)) { + // Yes it does, break the loop + *stp = st; + found = 1; + break; + } + } + + // If no index file exists, restore directory path + if (!found) { + path[n] = '\0'; + } + + return found; +} + +static int parse_range_header(const char *header, int64_t *a, int64_t *b) { + return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); +} + +static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { + strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); +} + +static void open_file_endpoint(struct connection *conn, const char *path, + file_stat_t *st) { + char date[64], lm[64], etag[64], range[64], headers[500]; + const char *msg = "OK", *hdr; + time_t curtime = time(NULL); + int64_t r1, r2; + struct vec mime_vec; + int n; + + conn->endpoint_type = EP_FILE; + set_close_on_exec(conn->endpoint.fd); + conn->mg_conn.status_code = 200; + + get_mime_type(conn->server, path, &mime_vec); + conn->cl = st->st_size; + range[0] = '\0'; + + // If Range: header specified, act accordingly + r1 = r2 = 0; + hdr = mg_get_header(&conn->mg_conn, "Range"); + if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && + r1 >= 0 && r2 >= 0) { + conn->mg_conn.status_code = 206; + conn->cl = n == 2 ? (r2 > conn->cl ? conn->cl : r2) - r1 + 1: conn->cl - r1; + mg_snprintf(range, sizeof(range), "Content-Range: bytes " + "%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n", + r1, r1 + conn->cl - 1, (int64_t) st->st_size); + msg = "Partial Content"; + lseek(conn->endpoint.fd, r1, SEEK_SET); + } + + // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to + // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 + gmt_time_string(date, sizeof(date), &curtime); + gmt_time_string(lm, sizeof(lm), &st->st_mtime); + construct_etag(etag, sizeof(etag), st); + + n = mg_snprintf(headers, sizeof(headers), + "HTTP/1.1 %d %s\r\n" + "Date: %s\r\n" + "Last-Modified: %s\r\n" + "Etag: %s\r\n" + "Content-Type: %.*s\r\n" + "Content-Length: %" INT64_FMT "\r\n" + "Connection: %s\r\n" + "Accept-Ranges: bytes\r\n" + "%s%s\r\n", + conn->mg_conn.status_code, msg, date, lm, etag, + (int) mime_vec.len, mime_vec.ptr, conn->cl, + suggest_connection_header(&conn->mg_conn), + range, MONGOOSE_USE_EXTRA_HTTP_HEADERS); + spool(&conn->remote_iobuf, headers, n); + + if (!strcmp(conn->mg_conn.request_method, "HEAD")) { + conn->flags |= CONN_SPOOL_DONE; + close(conn->endpoint.fd); + conn->endpoint_type = EP_NONE; + } +} + +#endif // MONGOOSE_NO_FILESYSTEM + +static void call_request_handler_if_data_is_buffered(struct connection *conn) { + struct iobuf *loc = &conn->local_iobuf; + struct mg_connection *c = &conn->mg_conn; + +#ifndef MONGOOSE_NO_WEBSOCKET + if (conn->mg_conn.is_websocket) { + do { } while (deliver_websocket_frame(conn)); + } else +#endif + if ((size_t) loc->len >= c->content_len && + call_request_handler(conn) == MG_REQUEST_NOT_PROCESSED) { + open_local_endpoint(conn, 1); + } +} + +#if !defined(MONGOOSE_NO_DIRECTORY_LISTING) || !defined(MONGOOSE_NO_DAV) + +#ifdef _WIN32 +struct dirent { + char d_name[MAX_PATH_SIZE]; +}; + +typedef struct DIR { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; + +// Implementation of POSIX opendir/closedir/readdir for Windows. +static DIR *opendir(const char *name) { + DIR *dir = NULL; + wchar_t wpath[MAX_PATH_SIZE]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, ARRAY_SIZE(wpath)); + attrs = GetFileAttributesW(wpath); + if (attrs != 0xFFFFFFFF && + ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + dir->handle = FindFirstFileW(wpath, &dir->info); + dir->result.d_name[0] = '\0'; + } else { + free(dir); + dir = NULL; + } + } + + return dir; +} + +static int closedir(DIR *dir) { + int result = 0; + + if (dir != NULL) { + if (dir->handle != INVALID_HANDLE_VALUE) + result = FindClose(dir->handle) ? 0 : -1; + + free(dir); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} + +static struct dirent *readdir(DIR *dir) { + struct dirent *result = 0; + + if (dir) { + if (dir->handle != INVALID_HANDLE_VALUE) { + result = &dir->result; + (void) WideCharToMultiByte(CP_UTF8, 0, + dir->info.cFileName, -1, result->d_name, + sizeof(result->d_name), NULL, NULL); + + if (!FindNextFileW(dir->handle, &dir->info)) { + (void) FindClose(dir->handle); + dir->handle = INVALID_HANDLE_VALUE; + } + + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} +#endif // _WIN32 POSIX opendir/closedir/readdir implementation + +static int scan_directory(struct connection *conn, const char *dir, + struct dir_entry **arr) { + char path[MAX_PATH_SIZE]; + struct dir_entry *p; + struct dirent *dp; + int arr_size = 0, arr_ind = 0, inc = 100; + DIR *dirp; + + *arr = NULL; + if ((dirp = (opendir(dir))) == NULL) return 0; + + while ((dp = readdir(dirp)) != NULL) { + // Do not show current dir and hidden files + if (!strcmp(dp->d_name, ".") || + !strcmp(dp->d_name, "..") || + must_hide_file(conn, dp->d_name)) { + continue; + } + mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); + + // Resize the array if nesessary + if (arr_ind >= arr_size) { + if ((p = (struct dir_entry *) + realloc(*arr, (inc + arr_size) * sizeof(**arr))) != NULL) { + // Memset new chunk to zero, otherwize st_mtime will have garbage which + // can make strftime() segfault, see + // http://code.google.com/p/mongoose/issues/detail?id=79 + memset(p + arr_size, 0, sizeof(**arr) * inc); + + *arr = p; + arr_size += inc; + } + } + + if (arr_ind < arr_size) { + (*arr)[arr_ind].conn = conn; + (*arr)[arr_ind].file_name = strdup(dp->d_name); + stat(path, &(*arr)[arr_ind].st); + arr_ind++; + } + } + closedir(dirp); + + return arr_ind; +} + +static void mg_url_encode(const char *src, char *dst, size_t dst_len) { + static const char *dont_escape = "._-$,;~()"; + static const char *hex = "0123456789abcdef"; + const char *end = dst + dst_len - 1; + + for (; *src != '\0' && dst < end; src++, dst++) { + if (isalnum(*(const unsigned char *) src) || + strchr(dont_escape, * (const unsigned char *) src) != NULL) { + *dst = *src; + } else if (dst + 2 < end) { + dst[0] = '%'; + dst[1] = hex[(* (const unsigned char *) src) >> 4]; + dst[2] = hex[(* (const unsigned char *) src) & 0xf]; + dst += 2; + } + } + + *dst = '\0'; +} +#endif // !NO_DIRECTORY_LISTING || !MONGOOSE_NO_DAV + +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + +static void print_dir_entry(const struct dir_entry *de) { + char size[64], mod[64], href[MAX_PATH_SIZE * 3], chunk[MAX_PATH_SIZE * 4]; + int64_t fsize = de->st.st_size; + int is_dir = S_ISDIR(de->st.st_mode), n; + const char *slash = is_dir ? "/" : ""; + + if (is_dir) { + mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]"); + } else { + // We use (signed) cast below because MSVC 6 compiler cannot + // convert unsigned __int64 to double. + if (fsize < 1024) { + mg_snprintf(size, sizeof(size), "%d", (int) fsize); + } else if (fsize < 0x100000) { + mg_snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0); + } else if (fsize < 0x40000000) { + mg_snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576); + } else { + mg_snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824); + } + } + strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.st_mtime)); + mg_url_encode(de->file_name, href, sizeof(href)); + n = mg_snprintf(chunk, sizeof(chunk), + "%s%s" + " %s  %s\n", + de->conn->mg_conn.uri, href, slash, de->file_name, slash, + mod, size); + write_chunk((struct connection *) de->conn, chunk, n); +} + +// Sort directory entries by size, or name, or modification time. +// On windows, __cdecl specification is needed in case if project is built +// with __stdcall convention. qsort always requires __cdels callback. +static int __cdecl compare_dir_entries(const void *p1, const void *p2) { + const struct dir_entry *a = (const struct dir_entry *) p1, + *b = (const struct dir_entry *) p2; + const char *qs = a->conn->mg_conn.query_string ? + a->conn->mg_conn.query_string : "na"; + int cmp_result = 0; + + if (S_ISDIR(a->st.st_mode) && !S_ISDIR(b->st.st_mode)) { + return -1; // Always put directories on top + } else if (!S_ISDIR(a->st.st_mode) && S_ISDIR(b->st.st_mode)) { + return 1; // Always put directories on top + } else if (*qs == 'n') { + cmp_result = strcmp(a->file_name, b->file_name); + } else if (*qs == 's') { + cmp_result = a->st.st_size == b->st.st_size ? 0 : + a->st.st_size > b->st.st_size ? 1 : -1; + } else if (*qs == 'd') { + cmp_result = a->st.st_mtime == b->st.st_mtime ? 0 : + a->st.st_mtime > b->st.st_mtime ? 1 : -1; + } + + return qs[1] == 'd' ? -cmp_result : cmp_result; +} + +static void send_directory_listing(struct connection *conn, const char *dir) { + char buf[2000]; + struct dir_entry *arr = NULL; + int i, num_entries, sort_direction = conn->mg_conn.query_string != NULL && + conn->mg_conn.query_string[1] == 'd' ? 'a' : 'd'; + + conn->mg_conn.status_code = 200; + mg_snprintf(buf, sizeof(buf), "%s", + "HTTP/1.1 200 OK\r\n" + "Transfer-Encoding: Chunked\r\n" + "Content-Type: text/html; charset=utf-8\r\n\r\n"); + spool(&conn->remote_iobuf, buf, strlen(buf)); + + mg_snprintf(buf, sizeof(buf), + "Index of %s" + "" + "

Index of %s

"
+              ""
+              ""
+              ""
+              "",
+              conn->mg_conn.uri, conn->mg_conn.uri,
+              sort_direction, sort_direction, sort_direction);
+  write_chunk(conn, buf, strlen(buf));
+
+  num_entries = scan_directory(conn, dir, &arr);
+  qsort(arr, num_entries, sizeof(arr[0]), compare_dir_entries);
+  for (i = 0; i < num_entries; i++) {
+    print_dir_entry(&arr[i]);
+    free(arr[i].file_name);
+  }
+  free(arr);
+
+  write_terminating_chunk(conn);
+  close_local_endpoint(conn);
+}
+#endif  // MONGOOSE_NO_DIRECTORY_LISTING
+
+#ifndef MONGOOSE_NO_DAV
+static void print_props(struct connection *conn, const char *uri,
+                        file_stat_t *stp) {
+  char mtime[64], buf[MAX_PATH_SIZE + 200];
+
+  gmt_time_string(mtime, sizeof(mtime), &stp->st_mtime);
+  mg_snprintf(buf, sizeof(buf),
+      ""
+       "%s"
+       ""
+        ""
+         "%s"
+         "%" INT64_FMT ""
+         "%s"
+        ""
+        "HTTP/1.1 200 OK"
+       ""
+      "\n",
+      uri, S_ISDIR(stp->st_mode) ? "" : "",
+      (int64_t) stp->st_size, mtime);
+  spool(&conn->remote_iobuf, buf, strlen(buf));
+}
+
+static void handle_propfind(struct connection *conn, const char *path,
+                            file_stat_t *stp) {
+  static const char header[] = "HTTP/1.1 207 Multi-Status\r\n"
+    "Connection: close\r\n"
+    "Content-Type: text/xml; charset=utf-8\r\n\r\n"
+    ""
+    "\n";
+  static const char footer[] = "";
+  const char *depth = mg_get_header(&conn->mg_conn, "Depth"),
+        *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
+
+  conn->mg_conn.status_code = 207;
+  spool(&conn->remote_iobuf, header, sizeof(header) - 1);
+
+  // Print properties for the requested resource itself
+  print_props(conn, conn->mg_conn.uri, stp);
+
+  // If it is a directory, print directory entries too if Depth is not 0
+  if (S_ISDIR(stp->st_mode) && !mg_strcasecmp(list_dir, "yes") &&
+      (depth == NULL || strcmp(depth, "0") != 0)) {
+    struct dir_entry *arr = NULL;
+    int i, num_entries = scan_directory(conn, path, &arr);
+
+    for (i = 0; i < num_entries; i++) {
+      char buf[MAX_PATH_SIZE], buf2[sizeof(buf) * 3];
+      struct dir_entry *de = &arr[i];
+
+      mg_snprintf(buf, sizeof(buf), "%s%s", de->conn->mg_conn.uri,
+                  de->file_name);
+      mg_url_encode(buf, buf2, sizeof(buf2) - 1);
+      print_props(conn, buf, &de->st);
+    }
+  }
+
+  spool(&conn->remote_iobuf, footer, sizeof(footer) - 1);
+  close_local_endpoint(conn);
+}
+
+static void handle_mkcol(struct connection *conn, const char *path) {
+  int status_code = 500;
+
+  if (conn->mg_conn.content_len > 0) {
+    status_code = 415;
+  } else if (!mkdir(path, 0755)) {
+    status_code = 201;
+  } else if (errno == EEXIST) {
+    status_code = 405;
+  } else if (errno == EACCES) {
+    status_code = 403;
+  } else if (errno == ENOENT) {
+    status_code = 409;
+  }
+  send_http_error(conn, status_code, NULL);
+}
+
+static int remove_directory(const char *dir) {
+  char path[MAX_PATH_SIZE];
+  struct dirent *dp;
+  file_stat_t st;
+  DIR *dirp;
+
+  if ((dirp = opendir(dir)) == NULL) return 0;
+
+  while ((dp = readdir(dirp)) != NULL) {
+    if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
+    mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
+    stat(path, &st);
+    if (S_ISDIR(st.st_mode)) {
+      remove_directory(path);
+    } else {
+      remove(path);
+    }
+  }
+  closedir(dirp);
+  rmdir(dir);
+
+  return 1;
+}
+
+static void handle_delete(struct connection *conn, const char *path) {
+  file_stat_t st;
+
+  if (stat(path, &st) != 0) {
+    send_http_error(conn, 404, NULL);
+  } else if (S_ISDIR(st.st_mode)) {
+    remove_directory(path);
+    send_http_error(conn, 204, NULL);
+  } else if (!remove(path) == 0) {
+    send_http_error(conn, 204, NULL);
+  } else {
+    send_http_error(conn, 423, NULL);
+  }
+}
+
+// For a given PUT path, create all intermediate subdirectories
+// for given path. Return 0 if the path itself is a directory,
+// or -1 on error, 1 if OK.
+static int put_dir(const char *path) {
+  char buf[MAX_PATH_SIZE];
+  const char *s, *p;
+  file_stat_t st;
+
+  // Create intermediate directories if they do not exist
+  for (s = p = path + 1; (p = strchr(s, '/')) != NULL; s = ++p) {
+    if (p - path >= (int) sizeof(buf)) return -1; // Buffer overflow
+    memcpy(buf, path, p - path);
+    buf[p - path] = '\0';
+    if (stat(buf, &st) != 0 && mkdir(buf, 0755) != 0) return -1;
+    if (p[1] == '\0') return 0;  // Path is a directory itself
+  }
+
+  return 1;
+}
+
+static void handle_put(struct connection *conn, const char *path) {
+  file_stat_t st;
+  const char *range, *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
+  int64_t r1, r2;
+  int rc;
+
+  conn->mg_conn.status_code = !stat(path, &st) ? 200 : 201;
+  if ((rc = put_dir(path)) == 0) {
+    mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\n\r\n",
+              conn->mg_conn.status_code);
+    close_local_endpoint(conn);
+  } else if (rc == -1) {
+    send_http_error(conn, 500, "put_dir: %s", strerror(errno));
+  } else if (cl_hdr == NULL) {
+    send_http_error(conn, 411, NULL);
+#ifdef _WIN32
+    //On Windows, open() is a macro with 2 params
+  } else if ((conn->endpoint.fd =
+              open(path, O_RDWR | O_CREAT | O_TRUNC)) < 0) {
+#else
+  } else if ((conn->endpoint.fd =
+              open(path, O_RDWR | O_CREAT | O_TRUNC, 0644)) < 0) {
+#endif
+    send_http_error(conn, 500, "open(%s): %s", path, strerror(errno));
+  } else {
+    DBG(("PUT [%s] %d", path, conn->local_iobuf.len));
+    conn->endpoint_type = EP_PUT;
+    set_close_on_exec(conn->endpoint.fd);
+    range = mg_get_header(&conn->mg_conn, "Content-Range");
+    conn->cl = to64(cl_hdr);
+    r1 = r2 = 0;
+    if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
+      conn->mg_conn.status_code = 206;
+      lseek(conn->endpoint.fd, r1, SEEK_SET);
+      conn->cl = r2 > r1 ? r2 - r1 + 1: conn->cl - r1;
+    }
+    mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n",
+              conn->mg_conn.status_code);
+  }
+}
+
+static void forward_put_data(struct connection *conn) {
+  struct iobuf *io = &conn->local_iobuf;
+  int n = write(conn->endpoint.fd, io->buf, io->len);
+  if (n > 0) {
+    discard_leading_iobuf_bytes(io, n);
+    conn->cl -= n;
+    if (conn->cl <= 0) {
+      close_local_endpoint(conn);
+    }
+  }
+}
+#endif //  MONGOOSE_NO_DAV
+
+static void send_options(struct connection *conn) {
+  static const char reply[] = "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, "
+    "CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\nDAV: 1\r\n\r\n";
+  spool(&conn->remote_iobuf, reply, sizeof(reply) - 1);
+  conn->flags |= CONN_SPOOL_DONE;
+}
+
+#ifndef MONGOOSE_NO_AUTH
+void mg_send_digest_auth_request(struct mg_connection *c) {
+  struct connection *conn = (struct connection *) c;
+  c->status_code = 401;
+  mg_printf(c,
+            "HTTP/1.1 401 Unauthorized\r\n"
+            "WWW-Authenticate: Digest qop=\"auth\", "
+            "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
+            conn->server->config_options[AUTH_DOMAIN],
+            (unsigned long) time(NULL));
+  close_local_endpoint(conn);
+}
+
+// Use the global passwords file, if specified by auth_gpass option,
+// or search for .htpasswd in the requested directory.
+static FILE *open_auth_file(struct connection *conn, const char *path) {
+  char name[MAX_PATH_SIZE];
+  const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE];
+  file_stat_t st;
+  FILE *fp = NULL;
+
+  if (gpass != NULL) {
+    // Use global passwords file
+    fp = fopen(gpass, "r");
+  } else if (!stat(path, &st) && S_ISDIR(st.st_mode)) {
+    mg_snprintf(name, sizeof(name), "%s%c%s", path, '/', PASSWORDS_FILE_NAME);
+    fp = fopen(name, "r");
+  } else {
+    // Try to find .htpasswd in requested directory.
+    if ((p = strrchr(path, '/')) == NULL) p = path;
+    mg_snprintf(name, sizeof(name), "%.*s%c%s",
+                (int) (p - path), path, '/', PASSWORDS_FILE_NAME);
+    fp = fopen(name, "r");
+  }
+
+  return fp;
+}
+
+#if !defined(HAVE_MD5) && !defined(MONGOOSE_NO_AUTH)
+typedef struct MD5Context {
+  uint32_t buf[4];
+  uint32_t bits[2];
+  unsigned char in[64];
+} MD5_CTX;
+
+static void byteReverse(unsigned char *buf, unsigned longs) {
+  uint32_t t;
+
+  // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN
+  if (is_big_endian()) {
+    do {
+      t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+        ((unsigned) buf[1] << 8 | buf[0]);
+      * (uint32_t *) buf = t;
+      buf += 4;
+    } while (--longs);
+  }
+}
+
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+#define MD5STEP(f, w, x, y, z, data, s) \
+  ( w += f(x, y, z) + data,  w = w<>(32-s),  w += x )
+
+// Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
+// initialization constants.
+static void MD5Init(MD5_CTX *ctx) {
+  ctx->buf[0] = 0x67452301;
+  ctx->buf[1] = 0xefcdab89;
+  ctx->buf[2] = 0x98badcfe;
+  ctx->buf[3] = 0x10325476;
+
+  ctx->bits[0] = 0;
+  ctx->bits[1] = 0;
+}
+
+static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
+  register uint32_t a, b, c, d;
+
+  a = buf[0];
+  b = buf[1];
+  c = buf[2];
+  d = buf[3];
+
+  MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+  MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+  MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+  MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+  MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+  MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+  MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+  MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+  MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+  MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+  MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+  MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+  MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+  MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+  MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+  MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+  MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+  MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+  MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+  MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+  MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+  MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+  MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+  MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+  MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+  MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+  MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+  MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+  MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+  MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+  MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+  MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+  MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+  MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+  MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+  MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+  MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+  MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+  MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+  MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+  MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+  MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+  MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+  MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+  MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+  MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+  MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+  MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+  MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+  MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+  MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+  MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+  MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+  MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+  MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+  MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+  MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+  MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+  MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+  MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+  MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+  MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}
+
+static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
+  uint32_t t;
+
+  t = ctx->bits[0];
+  if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
+    ctx->bits[1]++;
+  ctx->bits[1] += len >> 29;
+
+  t = (t >> 3) & 0x3f;
+
+  if (t) {
+    unsigned char *p = (unsigned char *) ctx->in + t;
+
+    t = 64 - t;
+    if (len < t) {
+      memcpy(p, buf, len);
+      return;
+    }
+    memcpy(p, buf, t);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    buf += t;
+    len -= t;
+  }
+
+  while (len >= 64) {
+    memcpy(ctx->in, buf, 64);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    buf += 64;
+    len -= 64;
+  }
+
+  memcpy(ctx->in, buf, len);
+}
+
+static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
+  unsigned count;
+  unsigned char *p;
+  uint32_t *a;
+
+  count = (ctx->bits[0] >> 3) & 0x3F;
+
+  p = ctx->in + count;
+  *p++ = 0x80;
+  count = 64 - 1 - count;
+  if (count < 8) {
+    memset(p, 0, count);
+    byteReverse(ctx->in, 16);
+    MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+    memset(ctx->in, 0, 56);
+  } else {
+    memset(p, 0, count - 8);
+  }
+  byteReverse(ctx->in, 14);
+
+  a = (uint32_t *)ctx->in;
+  a[14] = ctx->bits[0];
+  a[15] = ctx->bits[1];
+
+  MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+  byteReverse((unsigned char *) ctx->buf, 4);
+  memcpy(digest, ctx->buf, 16);
+  memset((char *) ctx, 0, sizeof(*ctx));
+}
+#endif // !HAVE_MD5
+
+
+
+// Stringify binary data. Output buffer must be twice as big as input,
+// because each byte takes 2 bytes in string representation
+static void bin2str(char *to, const unsigned char *p, size_t len) {
+  static const char *hex = "0123456789abcdef";
+
+  for (; len--; p++) {
+    *to++ = hex[p[0] >> 4];
+    *to++ = hex[p[0] & 0x0f];
+  }
+  *to = '\0';
+}
+
+// Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
+char *mg_md5(char buf[33], ...) {
+  unsigned char hash[16];
+  const char *p;
+  va_list ap;
+  MD5_CTX ctx;
+
+  MD5Init(&ctx);
+
+  va_start(ap, buf);
+  while ((p = va_arg(ap, const char *)) != NULL) {
+    MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
+  }
+  va_end(ap);
+
+  MD5Final(hash, &ctx);
+  bin2str(buf, hash, sizeof(hash));
+  return buf;
+}
+
+// Check the user's password, return 1 if OK
+static int check_password(const char *method, const char *ha1, const char *uri,
+                          const char *nonce, const char *nc, const char *cnonce,
+                          const char *qop, const char *response) {
+  char ha2[32 + 1], expected_response[32 + 1];
+
+#if 0
+  // Check for authentication timeout
+  if ((unsigned long) time(NULL) - (unsigned long) to64(nonce) > 3600) {
+    return 0;
+  }
+#endif
+
+  mg_md5(ha2, method, ":", uri, NULL);
+  mg_md5(expected_response, ha1, ":", nonce, ":", nc,
+      ":", cnonce, ":", qop, ":", ha2, NULL);
+
+  return mg_strcasecmp(response, expected_response) == 0 ?
+    MG_AUTH_OK : MG_AUTH_FAIL;
+}
+
+
+// Authorize against the opened passwords file. Return 1 if authorized.
+int mg_authorize_digest(struct mg_connection *c, FILE *fp) {
+  struct connection *conn = (struct connection *) c;
+  const char *hdr;
+  char line[256], f_user[256], ha1[256], f_domain[256], user[100], nonce[100],
+       uri[MAX_REQUEST_SIZE], cnonce[100], resp[100], qop[100], nc[100];
+
+  if (c == NULL || fp == NULL) return 0;
+  if ((hdr = mg_get_header(c, "Authorization")) == NULL ||
+      mg_strncasecmp(hdr, "Digest ", 7) != 0) return 0;
+  if (!mg_parse_header(hdr, "username", user, sizeof(user))) return 0;
+  if (!mg_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce))) return 0;
+  if (!mg_parse_header(hdr, "response", resp, sizeof(resp))) return 0;
+  if (!mg_parse_header(hdr, "uri", uri, sizeof(uri))) return 0;
+  if (!mg_parse_header(hdr, "qop", qop, sizeof(qop))) return 0;
+  if (!mg_parse_header(hdr, "nc", nc, sizeof(nc))) return 0;
+  if (!mg_parse_header(hdr, "nonce", nonce, sizeof(nonce))) return 0;
+
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) == 3 &&
+        !strcmp(user, f_user) &&
+        // NOTE(lsm): due to a bug in MSIE, we do not compare URIs
+        !strcmp(conn->server->config_options[AUTH_DOMAIN], f_domain))
+      return check_password(c->request_method, ha1, uri,
+                            nonce, nc, cnonce, qop, resp);
+  }
+  return MG_AUTH_FAIL;
+}
+
+
+// Return 1 if request is authorised, 0 otherwise.
+static int is_authorized(struct connection *conn, const char *path) {
+  FILE *fp;
+  int authorized = MG_AUTH_OK;
+
+  if ((fp = open_auth_file(conn, path)) != NULL) {
+    authorized = mg_authorize_digest(&conn->mg_conn, fp);
+    fclose(fp);
+  }
+
+  return authorized;
+}
+
+static int is_authorized_for_dav(struct connection *conn) {
+  const char *auth_file = conn->server->config_options[DAV_AUTH_FILE];
+  FILE *fp;
+  int authorized = MG_AUTH_FAIL;
+
+  if (auth_file != NULL && (fp = fopen(auth_file, "r")) != NULL) {
+    authorized = mg_authorize_digest(&conn->mg_conn, fp);
+    fclose(fp);
+  }
+
+  return authorized;
+}
+
+static int is_dav_mutation(const struct connection *conn) {
+  const char *s = conn->mg_conn.request_method;
+  return s && (!strcmp(s, "PUT") || !strcmp(s, "DELETE") ||
+               !strcmp(s, "MKCOL"));
+}
+#endif // MONGOOSE_NO_AUTH
+
+int parse_header(const char *str, int str_len, const char *var_name, char *buf,
+                 size_t buf_size) {
+  int ch = ' ', len = 0, n = strlen(var_name);
+  const char *p, *end = str + str_len, *s = NULL;
+
+  if (buf != NULL && buf_size > 0) buf[0] = '\0';
+
+  // Find where variable starts
+  for (s = str; s != NULL && s + n < end; s++) {
+    if ((s == str || s[-1] == ' ' || s[-1] == ',') && s[n] == '=' &&
+        !memcmp(s, var_name, n)) break;
+  }
+
+  if (s != NULL && &s[n + 1] < end) {
+    s += n + 1;
+    if (*s == '"' || *s == '\'') ch = *s++;
+    p = s;
+    while (p < end && p[0] != ch && p[0] != ',' && len < (int) buf_size) {
+      if (p[0] == '\\' && p[1] == ch) p++;
+      buf[len++] = *p++;
+    }
+    if (len >= (int) buf_size || (ch != ' ' && *p != ch)) {
+      len = 0;
+    } else {
+      if (len > 0 && s[len - 1] == ',') len--;
+      if (len > 0 && s[len - 1] == ';') len--;
+      buf[len] = '\0';
+    }
+  }
+
+  return len;
+}
+
+int mg_parse_header(const char *s, const char *var_name, char *buf,
+                    size_t buf_size) {
+  return parse_header(s, s == NULL ? 0 : strlen(s), var_name, buf, buf_size);
+}
+
+#ifdef MONGOOSE_USE_LUA
+#include 
+#include 
+
+#ifdef _WIN32
+static void *mmap(void *addr, int64_t len, int prot, int flags, int fd,
+                  int offset) {
+  HANDLE fh = (HANDLE) _get_osfhandle(fd);
+  HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0);
+  void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len);
+  CloseHandle(mh);
+  return p;
+}
+#define munmap(x, y)  UnmapViewOfFile(x)
+#define MAP_FAILED NULL
+#define MAP_PRIVATE 0
+#define PROT_READ 0
+#else
+#include 
+#endif
+
+static void reg_string(struct lua_State *L, const char *name, const char *val) {
+  lua_pushstring(L, name);
+  lua_pushstring(L, val);
+  lua_rawset(L, -3);
+}
+
+static void reg_int(struct lua_State *L, const char *name, int val) {
+  lua_pushstring(L, name);
+  lua_pushinteger(L, val);
+  lua_rawset(L, -3);
+}
+
+static void reg_function(struct lua_State *L, const char *name,
+                         lua_CFunction func, struct mg_connection *conn) {
+  lua_pushstring(L, name);
+  lua_pushlightuserdata(L, conn);
+  lua_pushcclosure(L, func, 1);
+  lua_rawset(L, -3);
+}
+
+static int lua_write(lua_State *L) {
+  int i, num_args;
+  const char *str;
+  size_t size;
+  struct mg_connection *conn = (struct mg_connection *)
+    lua_touserdata(L, lua_upvalueindex(1));
+
+  num_args = lua_gettop(L);
+  for (i = 1; i <= num_args; i++) {
+    if (lua_isstring(L, i)) {
+      str = lua_tolstring(L, i, &size);
+      mg_write(conn, str, size);
+    }
+  }
+
+  return 0;
+}
+
+static int lsp_sock_close(lua_State *L) {
+  if (lua_gettop(L) > 0 && lua_istable(L, -1)) {
+    lua_getfield(L, -1, "sock");
+    closesocket((sock_t) lua_tonumber(L, -1));
+  } else {
+    return luaL_error(L, "invalid :close() call");
+  }
+  return 1;
+}
+
+static int lsp_sock_recv(lua_State *L) {
+  char buf[2000];
+  int n;
+
+  if (lua_gettop(L) > 0 && lua_istable(L, -1)) {
+    lua_getfield(L, -1, "sock");
+    n = recv((sock_t) lua_tonumber(L, -1), buf, sizeof(buf), 0);
+    if (n <= 0) {
+      lua_pushnil(L);
+    } else {
+      lua_pushlstring(L, buf, n);
+    }
+  } else {
+    return luaL_error(L, "invalid :close() call");
+  }
+  return 1;
+}
+
+static int lsp_sock_send(lua_State *L) {
+  const char *buf;
+  size_t len, sent = 0;
+  int n, sock;
+
+  if (lua_gettop(L) > 1 && lua_istable(L, -2) && lua_isstring(L, -1)) {
+    buf = lua_tolstring(L, -1, &len);
+    lua_getfield(L, -2, "sock");
+    sock = (int) lua_tonumber(L, -1);
+    while (sent < len) {
+      if ((n = send(sock, buf + sent, len - sent, 0)) <= 0) break;
+      sent += n;
+    }
+    lua_pushnumber(L, sent);
+  } else {
+    return luaL_error(L, "invalid :close() call");
+  }
+  return 1;
+}
+
+static const struct luaL_Reg luasocket_methods[] = {
+  {"close", lsp_sock_close},
+  {"send", lsp_sock_send},
+  {"recv", lsp_sock_recv},
+  {NULL, NULL}
+};
+
+static sock_t conn2(const char *host, int port) {
+  struct sockaddr_in sin;
+  struct hostent *he = NULL;
+  sock_t sock = INVALID_SOCKET;
+
+  if (host != NULL &&
+      (he = gethostbyname(host)) != NULL &&
+    (sock = socket(PF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET) {
+    set_close_on_exec(sock);
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons((uint16_t) port);
+    sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
+    if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
+      closesocket(sock);
+      sock = INVALID_SOCKET;
+    }
+  }
+  return sock;
+}
+
+static int lsp_connect(lua_State *L) {
+  sock_t sock;
+
+  if (lua_isstring(L, -2) && lua_isnumber(L, -1)) {
+    sock = conn2(lua_tostring(L, -2), (int) lua_tonumber(L, -1));
+    if (sock == INVALID_SOCKET) {
+      lua_pushnil(L);
+    } else {
+      lua_newtable(L);
+      reg_int(L, "sock", sock);
+      reg_string(L, "host", lua_tostring(L, -4));
+      luaL_getmetatable(L, "luasocket");
+      lua_setmetatable(L, -2);
+    }
+  } else {
+    return luaL_error(L, "connect(host,port): invalid parameter given.");
+  }
+  return 1;
+}
+
+static void prepare_lua_environment(struct mg_connection *ri, lua_State *L) {
+  extern void luaL_openlibs(lua_State *);
+  int i;
+
+  luaL_openlibs(L);
+#ifdef MONGOOSE_USE_LUA_SQLITE3
+  { extern int luaopen_lsqlite3(lua_State *); luaopen_lsqlite3(L); }
+#endif
+
+  luaL_newmetatable(L, "luasocket");
+  lua_pushliteral(L, "__index");
+  lua_newtable(L);
+  luaL_register(L, NULL, luasocket_methods);
+  //luaL_newlib(L, luasocket_methods);
+  lua_rawset(L, -3);
+  lua_pop(L, 1);
+  lua_register(L, "connect", lsp_connect);
+
+  if (ri == NULL) return;
+
+  // Register mg module
+  lua_newtable(L);
+  reg_function(L, "write", lua_write, ri);
+
+  // Export request_info
+  lua_pushstring(L, "request_info");
+  lua_newtable(L);
+  reg_string(L, "request_method", ri->request_method);
+  reg_string(L, "uri", ri->uri);
+  reg_string(L, "http_version", ri->http_version);
+  reg_string(L, "query_string", ri->query_string);
+  reg_string(L, "remote_ip", ri->remote_ip);
+  reg_int(L, "remote_port", ri->remote_port);
+  lua_pushstring(L, "content");
+  lua_pushlstring(L, ri->content == NULL ? "" : ri->content, 0);
+  lua_rawset(L, -3);
+  reg_int(L, "content_len", ri->content_len);
+  reg_int(L, "num_headers", ri->num_headers);
+  lua_pushstring(L, "http_headers");
+  lua_newtable(L);
+  for (i = 0; i < ri->num_headers; i++) {
+    reg_string(L, ri->http_headers[i].name, ri->http_headers[i].value);
+  }
+  lua_rawset(L, -3);
+  lua_rawset(L, -3);
+
+  lua_setglobal(L, "mg");
+
+  // Register default mg.onerror function
+  (void) luaL_dostring(L, "mg.onerror = function(e) mg.write('\\nLua "
+                       "error:\\n', debug.traceback(e, 1)) end");
+}
+
+static int lua_error_handler(lua_State *L) {
+  const char *error_msg =  lua_isstring(L, -1) ?  lua_tostring(L, -1) : "?\n";
+
+  lua_getglobal(L, "mg");
+  if (!lua_isnil(L, -1)) {
+    lua_getfield(L, -1, "write");   // call mg.write()
+    lua_pushstring(L, error_msg);
+    lua_pushliteral(L, "\n");
+    lua_call(L, 2, 0);
+    (void) luaL_dostring(L, "mg.write(debug.traceback(), '\\n')");
+  } else {
+    printf("Lua error: [%s]\n", error_msg);
+    (void) luaL_dostring(L, "print(debug.traceback(), '\\n')");
+  }
+  // TODO(lsm): leave the stack balanced
+
+  return 0;
+}
+
+static void lsp(struct connection *conn, const char *p, int len, lua_State *L) {
+  int i, j, pos = 0;
+
+  for (i = 0; i < len; i++) {
+    if (p[i] == '<' && p[i + 1] == '?') {
+      for (j = i + 1; j < len ; j++) {
+        if (p[j] == '?' && p[j + 1] == '>') {
+          mg_write(&conn->mg_conn, p + pos, i - pos);
+          if (luaL_loadbuffer(L, p + (i + 2), j - (i + 2), "") == 0) {
+            lua_pcall(L, 0, LUA_MULTRET, 0);
+          }
+          pos = j + 2;
+          i = pos - 1;
+          break;
+        }
+      }
+    }
+  }
+  if (i > pos) mg_write(&conn->mg_conn, p + pos, i - pos);
+}
+
+static void handle_lsp_request(struct connection *conn, const char *path,
+                               file_stat_t *st) {
+  void *p = NULL;
+  lua_State *L = NULL;
+  FILE *fp = NULL;
+
+  if ((fp = fopen(path, "r")) == NULL ||
+      (p = mmap(NULL, st->st_size, PROT_READ, MAP_PRIVATE,
+                fileno(fp), 0)) == MAP_FAILED ||
+      (L = luaL_newstate()) == NULL) {
+    send_http_error(conn, 500, "mmap(%s): %s", path, strerror(errno));
+  } else {
+    // We're not sending HTTP headers here, Lua page must do it.
+    prepare_lua_environment(&conn->mg_conn, L);
+    lua_pushcclosure(L, &lua_error_handler, 0);
+    lua_pushvalue(L, LUA_GLOBALSINDEX);
+    lsp(conn, p, (int) st->st_size, L);
+    close_local_endpoint(conn);
+  }
+
+  if (L != NULL) lua_close(L);
+  if (p != NULL) munmap(p, st->st_size);
+  if (fp != NULL) fclose(fp);
+}
+#endif // MONGOOSE_USE_LUA
+
+static void open_local_endpoint(struct connection *conn, int skip_user) {
+#ifndef MONGOOSE_NO_FILESYSTEM
+  static const char lua_pat[] = LUA_SCRIPT_PATTERN;
+  file_stat_t st;
+  char path[MAX_PATH_SIZE];
+  int exists = 0, is_directory = 0;
+#ifndef MONGOOSE_NO_CGI
+  const char *cgi_pat = conn->server->config_options[CGI_PATTERN];
+#else
+  const char *cgi_pat = DEFAULT_CGI_PATTERN;
+#endif
+#ifndef MONGOOSE_NO_DIRECTORY_LISTING
+  const char *dir_lst = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
+#else
+  const char *dir_lst = "yes";
+#endif
+#endif
+
+#ifndef MONGOOSE_NO_AUTH
+  // Call auth handler
+  if (conn->server->auth_handler != NULL &&
+      conn->server->auth_handler(&conn->mg_conn) == MG_AUTH_FAIL) {
+    mg_send_digest_auth_request(&conn->mg_conn);
+    return;
+  }
+#endif
+
+  // Call URI handler if one is registered for this URI
+  if (skip_user == 0 && conn->server->request_handler != NULL) {
+    conn->endpoint_type = EP_USER;
+#if MONGOOSE_USE_POST_SIZE_LIMIT > 1
+    {
+      const char *cl = mg_get_header(&conn->mg_conn, "Content-Length");
+      if (!strcmp(conn->mg_conn.request_method, "POST") &&
+          (cl == NULL || to64(cl) > MONGOOSE_USE_POST_SIZE_LIMIT)) {
+        send_http_error(conn, 500, "POST size > %zu",
+                        (size_t) MONGOOSE_USE_POST_SIZE_LIMIT);
+      }
+    }
+#endif
+    return;
+  }
+
+#ifdef MONGOOSE_NO_FILESYSTEM
+  if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
+    send_options(conn);
+  } else {
+    send_http_error(conn, 404, NULL);
+  }
+#else
+  exists = convert_uri_to_file_name(conn, path, sizeof(path), &st);
+  is_directory = S_ISDIR(st.st_mode);
+
+  if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
+    send_options(conn);
+  } else if (conn->server->config_options[DOCUMENT_ROOT] == NULL) {
+    send_http_error(conn, 404, NULL);
+#ifndef MONGOOSE_NO_AUTH
+  } else if ((!is_dav_mutation(conn) && !is_authorized(conn, path)) ||
+             (is_dav_mutation(conn) && !is_authorized_for_dav(conn))) {
+    mg_send_digest_auth_request(&conn->mg_conn);
+    close_local_endpoint(conn);
+#endif
+#ifndef MONGOOSE_NO_DAV
+  } else if (!strcmp(conn->mg_conn.request_method, "PROPFIND")) {
+    handle_propfind(conn, path, &st);
+  } else if (!strcmp(conn->mg_conn.request_method, "MKCOL")) {
+    handle_mkcol(conn, path);
+  } else if (!strcmp(conn->mg_conn.request_method, "DELETE")) {
+    handle_delete(conn, path);
+  } else if (!strcmp(conn->mg_conn.request_method, "PUT")) {
+    handle_put(conn, path);
+#endif
+  } else if (!exists || must_hide_file(conn, path)) {
+    send_http_error(conn, 404, NULL);
+  } else if (is_directory &&
+             conn->mg_conn.uri[strlen(conn->mg_conn.uri) - 1] != '/') {
+    conn->mg_conn.status_code = 301;
+    mg_printf(&conn->mg_conn, "HTTP/1.1 301 Moved Permanently\r\n"
+              "Location: %s/\r\n\r\n", conn->mg_conn.uri);
+    close_local_endpoint(conn);
+  } else if (is_directory && !find_index_file(conn, path, sizeof(path), &st)) {
+    if (!mg_strcasecmp(dir_lst, "yes")) {
+#ifndef MONGOOSE_NO_DIRECTORY_LISTING
+      send_directory_listing(conn, path);
+#else
+      send_http_error(conn, 501, NULL);
+#endif
+    } else {
+      send_http_error(conn, 403, NULL);
+    }
+  } else if (match_prefix(lua_pat, sizeof(lua_pat) - 1, path) > 0) {
+#ifdef MONGOOSE_USE_LUA
+    handle_lsp_request(conn, path, &st);
+#else
+    send_http_error(conn, 501, NULL);
+#endif
+  } else if (match_prefix(cgi_pat, strlen(cgi_pat), path) > 0) {
+#if !defined(MONGOOSE_NO_CGI)
+    open_cgi_endpoint(conn, path);
+#else
+    send_http_error(conn, 501, NULL);
+#endif // !MONGOOSE_NO_CGI
+  } else if (is_not_modified(conn, &st)) {
+    send_http_error(conn, 304, NULL);
+  } else if ((conn->endpoint.fd = open(path, O_RDONLY | O_BINARY)) != -1) {
+    // O_BINARY is required for Windows, otherwise in default text mode
+    // two bytes \r\n will be read as one.
+    open_file_endpoint(conn, path, &st);
+  } else {
+    send_http_error(conn, 404, NULL);
+  }
+#endif  // MONGOOSE_NO_FILESYSTEM
+}
+
+static void send_continue_if_expected(struct connection *conn) {
+  static const char expect_response[] = "HTTP/1.1 100 Continue\r\n\r\n";
+  const char *expect_hdr = mg_get_header(&conn->mg_conn, "Expect");
+
+  if (expect_hdr != NULL && !mg_strcasecmp(expect_hdr, "100-continue")) {
+    spool(&conn->remote_iobuf, expect_response, sizeof(expect_response) - 1);
+  }
+}
+
+static int is_valid_uri(const char *uri) {
+  // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
+  // URI can be an asterisk (*) or should start with slash.
+  return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
+}
+
+static void try_http_parse_and_set_content_length(struct connection *conn) {
+  struct iobuf *io = &conn->local_iobuf;
+
+  if (conn->request_len == 0 &&
+      (conn->request_len = get_request_len(io->buf, io->len)) > 0) {
+    // If request is buffered in, remove it from the iobuf. This is because
+    // iobuf could be reallocated, and pointers in parsed request could
+    // become invalid.
+    conn->request = (char *) malloc(conn->request_len);
+    memcpy(conn->request, io->buf, conn->request_len);
+    DBG(("%p [%.*s]", conn, conn->request_len, conn->request));
+    discard_leading_iobuf_bytes(io, conn->request_len);
+    conn->request_len = parse_http_message(conn->request, conn->request_len,
+                                           &conn->mg_conn);
+    if (conn->request_len > 0) {
+      const char *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
+      conn->cl = cl_hdr == NULL ? 0 : to64(cl_hdr);
+      conn->mg_conn.content_len = (long int) conn->cl;
+    }
+  }
+}
+
+static void process_request(struct connection *conn) {
+  struct iobuf *io = &conn->local_iobuf;
+
+  try_http_parse_and_set_content_length(conn);
+  DBG(("%p %d %d %d [%.*s]", conn, conn->request_len, io->len, conn->flags,
+       io->len, io->buf));
+  if (conn->request_len < 0 ||
+      (conn->request_len > 0 && !is_valid_uri(conn->mg_conn.uri))) {
+    send_http_error(conn, 400, NULL);
+  } else if (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE) {
+    send_http_error(conn, 413, NULL);
+  } else if (conn->request_len > 0 &&
+             strcmp(conn->mg_conn.http_version, "1.0") != 0 &&
+             strcmp(conn->mg_conn.http_version, "1.1") != 0) {
+    send_http_error(conn, 505, NULL);
+  } else if (conn->request_len > 0 && conn->endpoint_type == EP_NONE) {
+#ifndef MONGOOSE_NO_WEBSOCKET
+    send_websocket_handshake_if_requested(&conn->mg_conn);
+#endif
+    send_continue_if_expected(conn);
+    open_local_endpoint(conn, 0);
+  }
+
+#ifndef MONGOOSE_NO_CGI
+  if (conn->endpoint_type == EP_CGI && io->len > 0) {
+    forward_post_data(conn);
+  }
+#endif
+  if (conn->endpoint_type == EP_USER) {
+    call_request_handler_if_data_is_buffered(conn);
+  }
+#ifndef MONGOOSE_NO_DAV
+  if (conn->endpoint_type == EP_PUT && io->len > 0) {
+    forward_put_data(conn);
+  }
+#endif
+}
+
+static void call_http_client_handler(struct connection *conn, int code) {
+  conn->mg_conn.status_code = code;
+  // For responses without Content-Lengh, use the whole buffer
+  if (conn->cl == 0 && code == MG_DOWNLOAD_SUCCESS) {
+    conn->mg_conn.content_len = conn->local_iobuf.len;
+  }
+  conn->mg_conn.content = conn->local_iobuf.buf;
+  if (conn->handler(&conn->mg_conn) || code == MG_CONNECT_FAILURE ||
+      code == MG_DOWNLOAD_FAILURE) {
+    conn->flags |= CONN_CLOSE;
+  }
+  discard_leading_iobuf_bytes(&conn->local_iobuf, conn->mg_conn.content_len);
+  conn->flags = conn->mg_conn.status_code = 0;
+  conn->cl = conn->num_bytes_sent = conn->request_len = 0;
+  free(conn->request);
+  conn->request = NULL;
+}
+
+static void process_response(struct connection *conn) {
+  struct iobuf *io = &conn->local_iobuf;
+
+  try_http_parse_and_set_content_length(conn);
+  DBG(("%p %d %d [%.*s]", conn, conn->request_len, io->len,
+       io->len > 40 ? 40 : io->len, io->buf));
+  if (conn->request_len < 0 ||
+      (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE)) {
+    call_http_client_handler(conn, MG_DOWNLOAD_FAILURE);
+  }
+  if (io->len >= conn->cl) {
+    call_http_client_handler(conn, MG_DOWNLOAD_SUCCESS);
+  }
+}
+
+static void read_from_socket(struct connection *conn) {
+  char buf[IOBUF_SIZE];
+  int n = 0;
+
+  if (conn->endpoint_type == EP_CLIENT && conn->flags & CONN_CONNECTING) {
+    callback_http_client_on_connect(conn);
+    return;
+  }
+
+#ifdef MONGOOSE_USE_SSL
+  if (conn->ssl != NULL) {
+    if (conn->flags & CONN_SSL_HANDS_SHAKEN) {
+      n = SSL_read(conn->ssl, buf, sizeof(buf));
+    } else {
+      if (SSL_accept(conn->ssl) == 1) {
+        conn->flags |= CONN_SSL_HANDS_SHAKEN;
+      }
+      return;
+    }
+  } else
+#endif
+  {
+    n = recv(conn->client_sock, buf, sizeof(buf), 0);
+  }
+
+  DBG(("%p %d %d (1)", conn, n, conn->flags));
+
+#ifdef MONGOOSE_HEXDUMP
+  hexdump(conn, buf, n, "<-");
+#endif
+
+  if (is_error(n)) {
+    if (conn->endpoint_type == EP_CLIENT && conn->local_iobuf.len > 0) {
+      call_http_client_handler(conn, MG_DOWNLOAD_SUCCESS);
+    }
+    conn->flags |= CONN_CLOSE;
+  } else if (n > 0) {
+    spool(&conn->local_iobuf, buf, n);
+    if (conn->endpoint_type == EP_CLIENT) {
+      process_response(conn);
+    } else {
+      process_request(conn);
+    }
+  }
+  DBG(("%p %d %d (2)", conn, n, conn->flags));
+}
+
+int mg_connect(struct mg_server *server, const char *host, int port,
+               int use_ssl, mg_handler_t handler, void *param) {
+  sock_t sock = INVALID_SOCKET;
+  struct sockaddr_in sin;
+  struct hostent *he = NULL;
+  struct connection *conn = NULL;
+  int connect_ret_val;
+
+  if (host == NULL || (he = gethostbyname(host)) == NULL ||
+      (sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) return 0;
+#ifndef MONGOOSE_USE_SSL
+  if (use_ssl) return 0;
+#endif
+
+  sin.sin_family = AF_INET;
+  sin.sin_port = htons((uint16_t) port);
+  sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
+  set_non_blocking_mode(sock);
+
+  connect_ret_val = connect(sock, (struct sockaddr *) &sin, sizeof(sin));
+  if (is_error(connect_ret_val)) {
+    return 0;
+  } else if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) {
+    closesocket(sock);
+    return 0;
+  }
+
+  conn->server = server;
+  conn->client_sock = sock;
+  conn->endpoint_type = EP_CLIENT;
+  conn->handler = handler;
+  conn->mg_conn.server_param = server->server_data;
+  conn->mg_conn.connection_param = param;
+  conn->birth_time = conn->last_activity_time = time(NULL);
+  conn->flags = CONN_CONNECTING;
+  conn->mg_conn.status_code = MG_CONNECT_FAILURE;
+#ifdef MONGOOSE_USE_SSL
+  if (use_ssl && (conn->ssl = SSL_new(server->client_ssl_ctx)) != NULL) {
+    SSL_set_fd(conn->ssl, sock);
+  }
+#endif
+  LINKED_LIST_ADD_TO_FRONT(&server->active_connections, &conn->link);
+  DBG(("%p %s:%d", conn, host, port));
+
+  return 1;
+}
+
+#ifndef MONGOOSE_NO_LOGGING
+static void log_header(const struct mg_connection *conn, const char *header,
+                       FILE *fp) {
+  const char *header_value;
+
+  if ((header_value = mg_get_header(conn, header)) == NULL) {
+    (void) fprintf(fp, "%s", " -");
+  } else {
+    (void) fprintf(fp, " \"%s\"", header_value);
+  }
+}
+
+static void log_access(const struct connection *conn, const char *path) {
+  const struct mg_connection *c = &conn->mg_conn;
+  FILE *fp = (path == NULL) ?  NULL : fopen(path, "a+");
+  char date[64], user[100];
+
+  if (fp == NULL) return;
+  strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
+           localtime(&conn->birth_time));
+
+  flockfile(fp);
+  mg_parse_header(mg_get_header(&conn->mg_conn, "Authorization"), "username",
+                  user, sizeof(user));
+  fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
+          c->remote_ip, user[0] == '\0' ? "-" : user, date,
+          c->request_method ? c->request_method : "-",
+          c->uri ? c->uri : "-", c->http_version,
+          c->status_code, conn->num_bytes_sent);
+  log_header(c, "Referer", fp);
+  log_header(c, "User-Agent", fp);
+  fputc('\n', fp);
+  fflush(fp);
+
+  funlockfile(fp);
+  fclose(fp);
+}
+#endif
+
+static void close_local_endpoint(struct connection *conn) {
+  struct mg_connection *c = &conn->mg_conn;
+  // Must be done before free()
+  int keep_alive = should_keep_alive(&conn->mg_conn) &&
+    (conn->endpoint_type == EP_FILE || conn->endpoint_type == EP_USER);
+  DBG(("%p %d %d %d", conn, conn->endpoint_type, keep_alive, conn->flags));
+
+  switch (conn->endpoint_type) {
+    case EP_PUT: close(conn->endpoint.fd); break;
+    case EP_FILE: close(conn->endpoint.fd); break;
+    case EP_CGI: closesocket(conn->endpoint.cgi_sock); break;
+    default: break;
+  }
+
+#ifndef MONGOOSE_NO_LOGGING
+  if (c->status_code > 0 && conn->endpoint_type != EP_CLIENT &&
+      c->status_code != 400) {
+    log_access(conn, conn->server->config_options[ACCESS_LOG_FILE]);
+  }
+#endif
+
+  // Gobble possible POST data sent to the URI handler
+  discard_leading_iobuf_bytes(&conn->local_iobuf, conn->mg_conn.content_len);
+  conn->endpoint_type = EP_NONE;
+  conn->cl = conn->num_bytes_sent = conn->request_len = conn->flags = 0;
+  c->request_method = c->uri = c->http_version = c->query_string = NULL;
+  c->num_headers = c->status_code = c->is_websocket = c->content_len = 0;
+  free(conn->request);
+  conn->request = NULL;
+
+  if (keep_alive) {
+    process_request(conn);  // Can call us recursively if pipelining is used
+  } else {
+    conn->flags |= conn->remote_iobuf.len == 0 ? CONN_CLOSE : CONN_SPOOL_DONE;
+  }
+}
+
+static void transfer_file_data(struct connection *conn) {
+  char buf[IOBUF_SIZE];
+  int n = read(conn->endpoint.fd, buf, conn->cl < (int64_t) sizeof(buf) ?
+               (int) conn->cl : (int) sizeof(buf));
+
+  if (is_error(n)) {
+    close_local_endpoint(conn);
+  } else if (n > 0) {
+    conn->cl -= n;
+    spool(&conn->remote_iobuf, buf, n);
+    if (conn->cl <= 0) {
+      close_local_endpoint(conn);
+    }
+  }
+}
+
+void add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) {
+  FD_SET(sock, set);
+  if (sock > *max_fd) {
+    *max_fd = sock;
+  }
+}
+
+unsigned int mg_poll_server(struct mg_server *server, int milliseconds) {
+  struct ll *lp, *tmp;
+  struct connection *conn;
+  struct timeval tv;
+  fd_set read_set, write_set;
+  sock_t max_fd = -1;
+  time_t current_time = time(NULL), expire_time = current_time -
+    MONGOOSE_USE_IDLE_TIMEOUT_SECONDS;
+
+  if (server->listening_sock == INVALID_SOCKET) return 0;
+
+  FD_ZERO(&read_set);
+  FD_ZERO(&write_set);
+  add_to_set(server->listening_sock, &read_set, &max_fd);
+#ifndef MONGOOSE_NO_SOCKETPAIR
+  add_to_set(server->ctl[1], &read_set, &max_fd);
+#endif
+
+  LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
+    conn = LINKED_LIST_ENTRY(lp, struct connection, link);
+    add_to_set(conn->client_sock, &read_set, &max_fd);
+    if (conn->endpoint_type == EP_CLIENT && (conn->flags & CONN_CONNECTING)) {
+      add_to_set(conn->client_sock, &write_set, &max_fd);
+    }
+    if (conn->endpoint_type == EP_FILE) {
+      transfer_file_data(conn);
+    } else if (conn->endpoint_type == EP_CGI) {
+      add_to_set(conn->endpoint.cgi_sock, &read_set, &max_fd);
+    }
+    if (conn->remote_iobuf.len > 0 && !(conn->flags & CONN_BUFFER)) {
+      add_to_set(conn->client_sock, &write_set, &max_fd);
+    } else if (conn->flags & CONN_CLOSE) {
+      close_conn(conn);
+    }
+  }
+
+  tv.tv_sec = milliseconds / 1000;
+  tv.tv_usec = (milliseconds % 1000) * 1000;
+
+  if (select(max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) {
+    // Accept new connections
+    if (FD_ISSET(server->listening_sock, &read_set)) {
+      // We're not looping here, and accepting just one connection at
+      // a time. The reason is that eCos does not respect non-blocking
+      // flag on a listening socket and hangs in a loop.
+      if ((conn = accept_new_connection(server)) != NULL) {
+        conn->birth_time = conn->last_activity_time = current_time;
+      }
+    }
+
+    // Read/write from clients
+    LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
+      conn = LINKED_LIST_ENTRY(lp, struct connection, link);
+      if (FD_ISSET(conn->client_sock, &read_set)) {
+        conn->last_activity_time = current_time;
+        read_from_socket(conn);
+      }
+#ifndef MONGOOSE_NO_CGI
+      if (conn->endpoint_type == EP_CGI &&
+          FD_ISSET(conn->endpoint.cgi_sock, &read_set)) {
+        read_from_cgi(conn);
+      }
+#endif
+      if (FD_ISSET(conn->client_sock, &write_set)) {
+        if (conn->endpoint_type == EP_CLIENT &&
+            (conn->flags & CONN_CONNECTING)) {
+          read_from_socket(conn);
+        } else if (!(conn->flags & CONN_BUFFER)) {
+          conn->last_activity_time = current_time;
+          write_to_socket(conn);
+        }
+      }
+    }
+  }
+
+  // Close expired connections and those that need to be closed
+  LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
+    conn = LINKED_LIST_ENTRY(lp, struct connection, link);
+    if (conn->mg_conn.is_websocket) {
+      ping_idle_websocket_connection(conn, current_time);
+    }
+    if (conn->flags & CONN_LONG_RUNNING) {
+      conn->mg_conn.wsbits = conn->flags & CONN_CLOSE ? 1 : 0;
+      if (call_request_handler(conn) == MG_REQUEST_PROCESSED) {
+        conn->flags |= conn->remote_iobuf.len == 0 ? CONN_CLOSE : CONN_SPOOL_DONE;
+      }
+    }
+    if (conn->flags & CONN_CLOSE || conn->last_activity_time < expire_time) {
+      close_conn(conn);
+    }
+  }
+
+  return (unsigned int) current_time;
+}
+
+void mg_destroy_server(struct mg_server **server) {
+  int i;
+  struct ll *lp, *tmp;
+
+  if (server != NULL && *server != NULL) {
+    struct mg_server *s = *server;
+    // Do one last poll, see https://github.com/cesanta/mongoose/issues/286
+    mg_poll_server(s, 0);
+    closesocket(s->listening_sock);
+#ifndef MONGOOSE_NO_SOCKETPAIR
+    closesocket(s->ctl[0]);
+    closesocket(s->ctl[1]);
+#endif
+    LINKED_LIST_FOREACH(&s->active_connections, lp, tmp) {
+      close_conn(LINKED_LIST_ENTRY(lp, struct connection, link));
+    }
+    for (i = 0; i < (int) ARRAY_SIZE(s->config_options); i++) {
+      free(s->config_options[i]);  // It is OK to free(NULL)
+    }
+#ifdef MONGOOSE_USE_SSL
+    if (s->ssl_ctx != NULL) SSL_CTX_free((*server)->ssl_ctx);
+    if (s->client_ssl_ctx != NULL) SSL_CTX_free(s->client_ssl_ctx);
+#endif
+    free(s);
+    *server = NULL;
+  }
+}
+
+// Apply function to all active connections.
+void mg_iterate_over_connections(struct mg_server *server, mg_handler_t handler,
+                                 void *param) {
+  struct ll *lp, *tmp;
+  struct connection *conn;
+
+  LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
+    conn = LINKED_LIST_ENTRY(lp, struct connection, link);
+    conn->mg_conn.callback_param = param;
+    handler(&conn->mg_conn);
+  }
+}
+
+static int get_var(const char *data, size_t data_len, const char *name,
+                   char *dst, size_t dst_len) {
+  const char *p, *e, *s;
+  size_t name_len;
+  int len;
+
+  if (dst == NULL || dst_len == 0) {
+    len = -2;
+  } else if (data == NULL || name == NULL || data_len == 0) {
+    len = -1;
+    dst[0] = '\0';
+  } else {
+    name_len = strlen(name);
+    e = data + data_len;
+    len = -1;
+    dst[0] = '\0';
+
+    // data is "var1=val1&var2=val2...". Find variable first
+    for (p = data; p + name_len < e; p++) {
+      if ((p == data || p[-1] == '&') && p[name_len] == '=' &&
+          !mg_strncasecmp(name, p, name_len)) {
+
+        // Point p to variable value
+        p += name_len + 1;
+
+        // Point s to the end of the value
+        s = (const char *) memchr(p, '&', (size_t)(e - p));
+        if (s == NULL) {
+          s = e;
+        }
+        assert(s >= p);
+
+        // Decode variable into destination buffer
+        len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
+
+        // Redirect error code from -1 to -2 (destination buffer too small).
+        if (len == -1) {
+          len = -2;
+        }
+        break;
+      }
+    }
+  }
+
+  return len;
+}
+
+int mg_get_var(const struct mg_connection *conn, const char *name,
+               char *dst, size_t dst_len) {
+  int len = get_var(conn->query_string, conn->query_string == NULL ? 0 :
+                    strlen(conn->query_string), name, dst, dst_len);
+  if (len < 0) {
+    len = get_var(conn->content, conn->content_len, name, dst, dst_len);
+  }
+  return len;
+}
+
+static int get_line_len(const char *buf, int buf_len) {
+  int len = 0;
+  while (len < buf_len && buf[len] != '\n') len++;
+  return buf[len] == '\n' ? len + 1: -1;
+}
+
+int mg_parse_multipart(const char *buf, int buf_len,
+                       char *var_name, int var_name_len,
+                       char *file_name, int file_name_len,
+                       const char **data, int *data_len) {
+  static const char cd[] = "Content-Disposition: ";
+  //struct mg_connection c;
+  int hl, bl, n, ll, pos, cdl = sizeof(cd) - 1;
+  //char *p;
+
+  if (buf == NULL || buf_len <= 0) return 0;
+  if ((hl = get_request_len(buf, buf_len)) <= 0) return 0;
+  if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0;
+
+  // Get boundary length
+  bl = get_line_len(buf, buf_len);
+
+  // Loop through headers, fetch variable name and file name
+  var_name[0] = file_name[0] = '\0';
+  for (n = bl; (ll = get_line_len(buf + n, hl - n)) > 0; n += ll) {
+    if (mg_strncasecmp(cd, buf + n, cdl) == 0) {
+      parse_header(buf + n + cdl, ll - (cdl + 2), "name",
+                   var_name, var_name_len);
+      parse_header(buf + n + cdl, ll - (cdl + 2), "filename",
+                   file_name, file_name_len);
+    }
+  }
+
+  // Scan body, search for terminating boundary
+  for (pos = hl; pos + (bl - 2) < buf_len; pos++) {
+    if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) {
+      if (data_len != NULL) *data_len = (pos - 2) - hl;
+      if (data != NULL) *data = buf + hl;
+      return pos;
+    }
+  }
+
+  return 0;
+}
+
+const char **mg_get_valid_option_names(void) {
+  return static_config_options;
+}
+
+static int get_option_index(const char *name) {
+  int i;
+
+  for (i = 0; static_config_options[i * 2] != NULL; i++) {
+    if (strcmp(static_config_options[i * 2], name) == 0) {
+      return i;
+    }
+  }
+  return -1;
+}
+
+static void set_default_option_values(char **opts) {
+  const char *value, **all_opts = mg_get_valid_option_names();
+  int i;
+
+  for (i = 0; all_opts[i * 2] != NULL; i++) {
+    value = all_opts[i * 2 + 1];
+    if (opts[i] == NULL && value != NULL) {
+      opts[i] = mg_strdup(value);
+    }
+  }
+}
+
+// Valid listening port spec is: [ip_address:]port, e.g. "80", "127.0.0.1:3128"
+static int parse_port_string(const char *str, union socket_address *sa) {
+  unsigned int a, b, c, d, port;
+  int len = 0;
+#ifdef MONGOOSE_USE_IPV6
+  char buf[100];
+#endif
+
+  // MacOS needs that. If we do not zero it, subsequent bind() will fail.
+  // Also, all-zeroes in the socket address means binding to all addresses
+  // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
+  memset(sa, 0, sizeof(*sa));
+  sa->sin.sin_family = AF_INET;
+
+  if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
+    // Bind to a specific IPv4 address, e.g. 192.168.1.5:8080
+    sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
+    sa->sin.sin_port = htons((uint16_t) port);
+#if defined(MONGOOSE_USE_IPV6)
+  } else if (sscanf(str, "[%49[^]]]:%u%n", buf, &port, &len) == 2 &&
+             inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) {
+    // IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080
+    sa->sin6.sin6_family = AF_INET6;
+    sa->sin6.sin6_port = htons((uint16_t) port);
+#endif
+  } else if (sscanf(str, "%u%n", &port, &len) == 1) {
+    // If only port is specified, bind to IPv4, INADDR_ANY
+    sa->sin.sin_port = htons((uint16_t) port);
+  } else {
+    port = 0;   // Parsing failure. Make port invalid.
+  }
+
+  return port <= 0xffff && str[len] == '\0';
+}
+
+const char *mg_set_option(struct mg_server *server, const char *name,
+                          const char *value) {
+  int ind = get_option_index(name);
+  const char *error_msg = NULL;
+
+  if (ind < 0) {
+    error_msg = "No such option";
+  } else {
+    if (server->config_options[ind] != NULL) {
+      free(server->config_options[ind]);
+    }
+    server->config_options[ind] = mg_strdup(value);
+    DBG(("%s [%s]", name, value));
+
+    if (ind == LISTENING_PORT) {
+      if (server->listening_sock != INVALID_SOCKET) {
+        closesocket(server->listening_sock);
+      }
+      parse_port_string(server->config_options[LISTENING_PORT], &server->lsa);
+      server->listening_sock = open_listening_socket(&server->lsa);
+      if (server->listening_sock == INVALID_SOCKET) {
+        error_msg = "Cannot bind to port";
+      } else {
+        sockaddr_to_string(server->local_ip, sizeof(server->local_ip),
+                           &server->lsa);
+        if (!strcmp(value, "0")) {
+          char buf[10];
+          mg_snprintf(buf, sizeof(buf), "%d",
+                      (int) ntohs(server->lsa.sin.sin_port));
+          free(server->config_options[ind]);
+          server->config_options[ind] = mg_strdup(buf);
+        }
+      }
+#ifndef _WIN32
+    } else if (ind == RUN_AS_USER) {
+      struct passwd *pw;
+      if ((pw = getpwnam(value)) == NULL) {
+        error_msg = "Unknown user";
+      } else if (setgid(pw->pw_gid) != 0) {
+        error_msg = "setgid() failed";
+      } else if (setuid(pw->pw_uid) != 0) {
+        error_msg = "setuid() failed";
+      }
+#endif
+#ifdef MONGOOSE_USE_SSL
+    } else if (ind == SSL_CERTIFICATE) {
+      //SSL_library_init();
+      if ((server->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
+        error_msg = "SSL_CTX_new() failed";
+      } else if (SSL_CTX_use_certificate_file(server->ssl_ctx, value, 1) == 0 ||
+                 SSL_CTX_use_PrivateKey_file(server->ssl_ctx, value, 1) == 0) {
+        error_msg = "Cannot load PEM file";
+      } else {
+        SSL_CTX_use_certificate_chain_file(server->ssl_ctx, value);
+      }
+#endif
+    }
+  }
+
+  return error_msg;
+}
+
+void mg_set_request_handler(struct mg_server *server, mg_handler_t handler) {
+  server->request_handler = handler;
+}
+
+void mg_set_http_close_handler(struct mg_server *server, mg_handler_t handler) {
+  server->http_close_handler = handler;
+}
+
+void mg_set_http_error_handler(struct mg_server *server, mg_handler_t handler) {
+  server->error_handler = handler;
+}
+
+void mg_set_auth_handler(struct mg_server *server, mg_handler_t handler) {
+  server->auth_handler = handler;
+}
+
+void mg_set_listening_socket(struct mg_server *server, int sock) {
+  if (server->listening_sock != INVALID_SOCKET) {
+    closesocket(server->listening_sock);
+  }
+  server->listening_sock = (sock_t) sock;
+}
+
+int mg_get_listening_socket(struct mg_server *server) {
+  return server->listening_sock;
+}
+
+const char *mg_get_option(const struct mg_server *server, const char *name) {
+  const char **opts = (const char **) server->config_options;
+  int i = get_option_index(name);
+  return i == -1 ? NULL : opts[i] == NULL ? "" : opts[i];
+}
+
+struct mg_server *mg_create_server(void *server_data) {
+  struct mg_server *server = (struct mg_server *) calloc(1, sizeof(*server));
+
+#ifdef _WIN32
+  WSADATA data;
+  WSAStartup(MAKEWORD(2, 2), &data);
+#else
+  // Ignore SIGPIPE signal, so if browser cancels the request, it
+  // won't kill the whole process.
+  signal(SIGPIPE, SIG_IGN);
+#endif
+
+  LINKED_LIST_INIT(&server->active_connections);
+
+#ifndef MONGOOSE_NO_SOCKETPAIR
+  // Create control socket pair. Do it in a loop to protect from
+  // interrupted syscalls in mg_socketpair().
+  do {
+    mg_socketpair(server->ctl);
+  } while (server->ctl[0] == INVALID_SOCKET);
+#endif
+
+#ifdef MONGOOSE_USE_SSL
+  SSL_library_init();
+  server->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method());
+#endif
+
+  server->server_data = server_data;
+  server->listening_sock = INVALID_SOCKET;
+  set_default_option_values(server->config_options);
+
+  return server;
+}
diff --git a/src/mongoose.h b/src/mongoose.h
new file mode 100644
index 0000000..28ad70e
--- /dev/null
+++ b/src/mongoose.h
@@ -0,0 +1,125 @@
+// Copyright (c) 2004-2013 Sergey Lyubka 
+// Copyright (c) 2013-2014 Cesanta Software Limited
+// All rights reserved
+//
+// This library is dual-licensed: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation. For the terms of this
+// license, see .
+//
+// You are free to use this library under the terms of the GNU General
+// Public License, but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// Alternatively, you can license this library under a commercial
+// license, as set out in .
+//
+// NOTE: Detailed API documentation is at http://cesanta.com/#docs
+
+#ifndef MONGOOSE_HEADER_INCLUDED
+#define  MONGOOSE_HEADER_INCLUDED
+
+#define MONGOOSE_VERSION "5.3"
+
+#include       // required for FILE
+#include      // required for size_t
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+// This structure contains information about HTTP request.
+struct mg_connection {
+  const char *request_method; // "GET", "POST", etc
+  const char *uri;            // URL-decoded URI
+  const char *http_version;   // E.g. "1.0", "1.1"
+  const char *query_string;   // URL part after '?', not including '?', or NULL
+
+  char remote_ip[48];         // Max IPv6 string length is 45 characters
+  const char *local_ip;       // Local IP address
+  unsigned short remote_port; // Client's port
+  unsigned short local_port;  // Local port number
+
+  int num_headers;            // Number of HTTP headers
+  struct mg_header {
+    const char *name;         // HTTP header name
+    const char *value;        // HTTP header value
+  } http_headers[30];
+
+  char *content;              // POST (or websocket message) data, or NULL
+  size_t content_len;       // content length
+
+  int is_websocket;           // Connection is a websocket connection
+  int status_code;            // HTTP status code for HTTP error handler
+  int wsbits;                 // First byte of the websocket frame
+  void *server_param;         // Parameter passed to mg_add_uri_handler()
+  void *connection_param;     // Placeholder for connection-specific data
+  void *callback_param;       // Used by mg_iterate_over_connections()
+};
+
+struct mg_server; // Opaque structure describing server instance
+typedef int (*mg_handler_t)(struct mg_connection *);
+
+// Server management functions
+struct mg_server *mg_create_server(void *server_param);
+void mg_destroy_server(struct mg_server **);
+const char *mg_set_option(struct mg_server *, const char *opt, const char *val);
+unsigned int mg_poll_server(struct mg_server *, int milliseconds);
+void mg_set_request_handler(struct mg_server *, mg_handler_t);
+void mg_set_http_close_handler(struct mg_server *, mg_handler_t);
+void mg_set_http_error_handler(struct mg_server *, mg_handler_t);
+void mg_set_auth_handler(struct mg_server *, mg_handler_t);
+const char **mg_get_valid_option_names(void);
+const char *mg_get_option(const struct mg_server *server, const char *name);
+void mg_set_listening_socket(struct mg_server *, int sock);
+int mg_get_listening_socket(struct mg_server *);
+void mg_iterate_over_connections(struct mg_server *, mg_handler_t, void *);
+
+// Connection management functions
+void mg_send_status(struct mg_connection *, int status_code);
+void mg_send_header(struct mg_connection *, const char *name, const char *val);
+void mg_send_data(struct mg_connection *, const void *data, int data_len);
+void mg_printf_data(struct mg_connection *, const char *format, ...);
+
+int mg_websocket_write(struct mg_connection *, int opcode,
+                       const char *data, size_t data_len);
+
+// Deprecated in favor of mg_send_* interface
+int mg_write(struct mg_connection *, const void *buf, int len);
+int mg_printf(struct mg_connection *conn, const char *fmt, ...);
+
+const char *mg_get_header(const struct mg_connection *, const char *name);
+const char *mg_get_mime_type(const char *name, const char *default_mime_type);
+int mg_get_var(const struct mg_connection *conn, const char *var_name,
+               char *buf, size_t buf_len);
+int mg_parse_header(const char *hdr, const char *var_name, char *buf, size_t);
+int mg_parse_multipart(const char *buf, int buf_len,
+                       char *var_name, int var_name_len,
+                       char *file_name, int file_name_len,
+                       const char **data, int *data_len);
+
+// Utility functions
+void *mg_start_thread(void *(*func)(void *), void *param);
+char *mg_md5(char buf[33], ...);
+int mg_authorize_digest(struct mg_connection *c, FILE *fp);
+
+// Callback function return codes
+enum { MG_REQUEST_NOT_PROCESSED, MG_REQUEST_PROCESSED, MG_REQUEST_CALL_AGAIN };
+enum { MG_AUTH_FAIL, MG_AUTH_OK };
+enum { MG_ERROR_NOT_PROCESSED, MG_ERROR_PROCESSED };
+enum { MG_CLIENT_CONTINUE, MG_CLIENT_CLOSE };
+
+// HTTP client events
+enum {
+  MG_CONNECT_SUCCESS, MG_CONNECT_FAILURE,
+  MG_DOWNLOAD_SUCCESS, MG_DOWNLOAD_FAILURE
+};
+int mg_connect(struct mg_server *, const char *host, int port, int use_ssl,
+               mg_handler_t handler, void *param);
+
+#ifdef __cplusplus
+}
+#endif // __cplusplus
+
+#endif // MONGOOSE_HEADER_INCLUDED
diff --git a/src/mpd_client.c b/src/mpd_client.c
index 3c34ac5..33d62b2 100644
--- a/src/mpd_client.c
+++ b/src/mpd_client.c
@@ -31,254 +31,273 @@
 #include 
 #include 
 #include 
-
 #include 
-#include 
-#include 
-#include 
-#include 
-#include 
 
 #include "mpd_client.h"
 #include "config.h"
 
-struct mpd_connection *conn = NULL;
-enum mpd_conn_states mpd_conn_state = MPD_DISCONNECTED;
-enum mpd_state mpd_play_state = MPD_STATE_UNKNOWN;
+const char * mpd_cmd_strs[] = {
+    MPD_CMDS(GEN_STR)
+};
 
-int callback_ympd(struct libwebsocket_context *context,
-        struct libwebsocket *wsi,
-        enum libwebsocket_callback_reasons reason,
-        void *user, void *in, size_t len)
+static inline enum mpd_cmd_ids get_cmd_id(char *cmd)
 {
-    size_t n,  m = -1;
-    char *buf = NULL, *p;
-    struct per_session_data__ympd *pss = (struct per_session_data__ympd *)user;
-
-    switch (reason) {
-        case LWS_CALLBACK_ESTABLISHED:
-            lwsl_info("mpd_client: "
-                    "LWS_CALLBACK_ESTABLISHED\n");
-            break;
-
-        case LWS_CALLBACK_SERVER_WRITEABLE:
-            buf = (char *)malloc(MAX_SIZE + LWS_SEND_BUFFER_PRE_PADDING + LWS_SEND_BUFFER_POST_PADDING);
-            if(buf == NULL) {
-                lwsl_err("ERROR Failed allocating memory\n");
-                return -1;
-            }
-            p = &buf[LWS_SEND_BUFFER_PRE_PADDING];
-
-            if(pss->do_send & DO_SEND_ERROR) {
-                n = snprintf(p, MAX_SIZE, "{\"type\":\"error\", \"data\": \"%s\"}", 
-                    mpd_connection_get_error_message(conn));
-                pss->do_send &= ~DO_SEND_ERROR;
-
-                /* Try to recover error */
-                if (!mpd_connection_clear_error(conn))
-                    mpd_conn_state = MPD_FAILURE;
-            }
-            else if(mpd_conn_state != MPD_CONNECTED) {
-                n = snprintf(p, MAX_SIZE, "{\"type\":\"disconnected\"}");
-            }
-            else if(pss->do_send & DO_SEND_PLAYLIST) {
-                /*n = mpd_put_playlist(p);*/
-                n = snprintf(p, MAX_SIZE, "{\"type\":\"update_playlist\"}");
-                pss->do_send &= ~DO_SEND_PLAYLIST;
-            }
-            else if(pss->do_send & DO_SEND_TRACK_INFO) {
-                n = mpd_put_current_song(p);
-                pss->do_send &= ~DO_SEND_TRACK_INFO;
-            }
-            else if(pss->do_send & DO_SEND_BROWSE) {
-                n = mpd_put_browse(p, pss->browse_path);
-                pss->do_send &= ~DO_SEND_BROWSE;
-                free(pss->browse_path);
-            }
-            else if(pss->do_send & DO_SEND_MPDHOST) {
-                n = snprintf(p, MAX_SIZE, "{\"type\":\"mpdhost\", \"data\": "
-                    "{\"host\" : \"%s\", \"port\": \"%d\"}"
-                    "}", mpd_host, mpd_port);
-                pss->do_send &= ~DO_SEND_MPDHOST;
-            }
-            else {
-                /* Default Action */
-                int current_song_id;
-                unsigned queue_version;
-
-                n = mpd_put_state(p, ¤t_song_id, &queue_version);
-                if(current_song_id != pss->current_song_id)
-                {
-                    pss->current_song_id = current_song_id;
-                    pss->do_send |= DO_SEND_TRACK_INFO;
-                    libwebsocket_callback_on_writable(context, wsi);
-                }
-                else if(pss->queue_version != queue_version) {
-                    pss->queue_version = queue_version;
-                    pss->do_send |= DO_SEND_PLAYLIST;
-                    libwebsocket_callback_on_writable(context, wsi);
-                }
-            }
+    for(int i = 0; i < sizeof(mpd_cmd_strs)/sizeof(mpd_cmd_strs[0]); i++)
+        if(!strncmp(cmd, mpd_cmd_strs[i], strlen(mpd_cmd_strs[i])))
+            return i;
 
-            if(n > 0)
-                m = libwebsocket_write(wsi, (unsigned char *)p, n, LWS_WRITE_TEXT);
+    return -1;
+}
 
-            if (m < n) {
-                lwsl_err("ERROR %d writing to socket\n", n, m);
-                free(buf);
-                return -1;
-            }
-            free(buf);
+int callback_mpd(struct mg_connection *c)
+{
+    enum mpd_cmd_ids cmd_id = get_cmd_id(c->content);
+    size_t n = 0;
+    unsigned int uint_buf, uint_buf_2;
+    int int_buf;
+    char *p_charbuf;
+
+    if(cmd_id == -1)
+        return MG_CLIENT_CONTINUE;
+
+    if(mpd.conn_state != MPD_CONNECTED && cmd_id != MPD_API_SET_MPDHOST &&
+        cmd_id != MPD_API_GET_MPDHOST && cmd_id != MPD_API_SET_MPDPASS)
+        return MG_CLIENT_CONTINUE;
+
+    switch(cmd_id)
+    {
+        case MPD_API_UPDATE_DB:
+            mpd_run_update(mpd.conn, NULL);
             break;
-
-        case LWS_CALLBACK_RECEIVE:
-            if(!strcmp((const char *)in, MPD_API_GET_PLAYLIST))
-                pss->do_send |= DO_SEND_PLAYLIST;
-            else if(!strcmp((const char *)in, MPD_API_GET_TRACK_INFO))
-                pss->do_send |= DO_SEND_TRACK_INFO;
-            else if(!strcmp((const char *)in, MPD_API_UPDATE_DB))
-                mpd_run_update(conn, NULL);
-            else if(!strcmp((const char *)in, MPD_API_SET_PAUSE))
-                mpd_run_toggle_pause(conn);
-            else if(!strcmp((const char *)in, MPD_API_SET_PREV))
-                mpd_run_previous(conn);
-            else if(!strcmp((const char *)in, MPD_API_SET_NEXT))
-                mpd_run_next(conn);
-            else if(!strcmp((const char *)in, MPD_API_SET_PLAY))
-                mpd_run_play(conn);
-            else if(!strcmp((const char *)in, MPD_API_SET_STOP))
-                mpd_run_stop(conn);
-            else if(!strcmp((const char *)in, MPD_API_RM_ALL))
-                mpd_run_clear(conn);
-            else if(!strncmp((const char *)in, MPD_API_RM_TRACK, sizeof(MPD_API_RM_TRACK)-1)) {
-                unsigned id;
-                if(sscanf(in, "MPD_API_RM_TRACK,%u", &id))
-                    mpd_run_delete_id(conn, id);
-
-                libwebsocket_callback_on_writable(context, wsi);
-            }
-            else if(!strncmp((const char *)in, MPD_API_PLAY_TRACK, sizeof(MPD_API_PLAY_TRACK)-1)) {
-                unsigned id;
-                if(sscanf(in, "MPD_API_PLAY_TRACK,%u", &id))
-                    mpd_run_play_id(conn, id);
-            }
-            else if(!strncmp((const char *)in, MPD_API_TOGGLE_RANDOM, sizeof(MPD_API_TOGGLE_RANDOM)-1)) {
-                unsigned random;
-                if(sscanf(in, "MPD_API_TOGGLE_RANDOM,%u", &random))
-                    mpd_run_random(conn, random);
-            }
-            else if(!strncmp((const char *)in, MPD_API_TOGGLE_REPEAT, sizeof(MPD_API_TOGGLE_REPEAT)-1)) {
-                unsigned repeat;
-                if(sscanf(in, "MPD_API_TOGGLE_REPEAT,%u", &repeat))
-                    mpd_run_repeat(conn, repeat);
-            }
-            else if(!strncmp((const char *)in, MPD_API_TOGGLE_CONSUME, sizeof(MPD_API_TOGGLE_CONSUME)-1)) {
-                unsigned consume;
-                if(sscanf(in, "MPD_API_TOGGLE_CONSUME,%u", &consume))
-                    mpd_run_consume(conn, consume);
-            }
-            else if(!strncmp((const char *)in, MPD_API_TOGGLE_SINGLE, sizeof(MPD_API_TOGGLE_SINGLE)-1)) {
-                unsigned single;
-                if(sscanf(in, "MPD_API_TOGGLE_SINGLE,%u", &single))
-                    mpd_run_single(conn, single);
-            }
-            else if(!strncmp((const char *)in, MPD_API_SET_VOLUME, sizeof(MPD_API_SET_VOLUME)-1)) {
-                unsigned int volume;
-                if(sscanf(in, "MPD_API_SET_VOLUME,%ud", &volume) && volume <= 100)
-                    mpd_run_set_volume(conn, volume);
-            }
-            else if(!strncmp((const char *)in, MPD_API_SET_SEEK, sizeof(MPD_API_SET_SEEK)-1)) {
-                unsigned int seek, songid;
-                if(sscanf(in, "MPD_API_SET_SEEK,%u,%u", &songid, &seek)) {
-                    mpd_run_seek_id(conn, songid, seek);
-                }
-            }
-            else if(!strncmp((const char *)in, MPD_API_GET_BROWSE, sizeof(MPD_API_GET_BROWSE)-1)) {
-                char *dir;
-                if(sscanf(in, "MPD_API_GET_BROWSE,%m[^\t\n]", &dir) && dir != NULL) {
-                    pss->do_send |= DO_SEND_BROWSE;
-                    pss->browse_path = dir;
-                }
-            }
-            else if(!strncmp((const char *)in, MPD_API_ADD_TRACK, sizeof(MPD_API_ADD_TRACK)-1)) {
-                char *uri;
-                if(sscanf(in, "MPD_API_ADD_TRACK,%m[^\t\n]", &uri) && uri != NULL) {
-                    mpd_run_add(conn, uri);
-                    free(uri);
-                }
+        case MPD_API_SET_PAUSE:
+            mpd_run_toggle_pause(mpd.conn);
+            break;
+        case MPD_API_SET_PREV:
+            mpd_run_previous(mpd.conn);
+            break;
+        case MPD_API_SET_NEXT:
+            mpd_run_next(mpd.conn);
+            break;
+        case MPD_API_SET_PLAY:
+            mpd_run_play(mpd.conn);
+            break;
+        case MPD_API_SET_STOP:
+            mpd_run_stop(mpd.conn);
+            break;
+        case MPD_API_RM_ALL:
+            mpd_run_clear(mpd.conn);
+            break;
+        case MPD_API_GET_PLAYLIST:
+            n = mpd_put_playlist(mpd.buf);
+            break;
+        case MPD_API_RM_TRACK:
+            if(sscanf(c->content, "MPD_API_RM_TRACK,%u", &uint_buf))
+                mpd_run_delete_id(mpd.conn, uint_buf);
+            break;
+        case MPD_API_PLAY_TRACK:
+            if(sscanf(c->content, "MPD_API_PLAY_TRACK,%u", &uint_buf))
+                mpd_run_play_id(mpd.conn, uint_buf);
+            break;
+        case MPD_API_TOGGLE_RANDOM:
+            if(sscanf(c->content, "MPD_API_TOGGLE_RANDOM,%u", &uint_buf))
+                mpd_run_random(mpd.conn, uint_buf);
+            break;
+        case MPD_API_TOGGLE_REPEAT:
+            if(sscanf(c->content, "MPD_API_TOGGLE_REPEAT,%u", &uint_buf))
+                mpd_run_repeat(mpd.conn, uint_buf);
+            break;
+        case MPD_API_TOGGLE_CONSUME:
+            if(sscanf(c->content, "MPD_API_TOGGLE_CONSUME,%u", &uint_buf))
+                mpd_run_consume(mpd.conn, uint_buf);
+            break;
+        case MPD_API_TOGGLE_SINGLE:
+            if(sscanf(c->content, "MPD_API_TOGGLE_SINGLE,%u", &uint_buf))
+                mpd_run_single(mpd.conn, uint_buf);
+            break;
+        case MPD_API_SET_VOLUME:
+            if(sscanf(c->content, "MPD_API_SET_VOLUME,%ud", &uint_buf) && uint_buf <= 100)
+                mpd_run_set_volume(mpd.conn, uint_buf);
+            break;
+        case MPD_API_SET_SEEK:
+            if(sscanf(c->content, "MPD_API_SET_SEEK,%u,%u", &uint_buf, &uint_buf_2))
+                mpd_run_seek_id(mpd.conn, uint_buf, uint_buf_2);
+            break;
+        case MPD_API_GET_BROWSE:
+            if(sscanf(c->content, "MPD_API_GET_BROWSE,%m[^\t\n]", &p_charbuf) && p_charbuf != NULL)
+                n = mpd_put_browse(mpd.buf, p_charbuf);
+            else
+                n = mpd_put_browse(mpd.buf, "/");
+            free(p_charbuf);
+            break;
+        case MPD_API_ADD_TRACK:
+            if(sscanf(c->content, "MPD_API_ADD_TRACK,%m[^\t\n]", &p_charbuf) && p_charbuf != NULL)
+            {
+                mpd_run_add(mpd.conn, p_charbuf);
+                free(p_charbuf);
             }
-            else if(!strncmp((const char *)in, MPD_API_ADD_PLAY_TRACK, sizeof(MPD_API_ADD_PLAY_TRACK)-1)) {
-                char *uri;
-                if(sscanf(in, "MPD_API_ADD_PLAY_TRACK,%m[^\t\n]", &uri) && uri != NULL) {
-                    int added_song = mpd_run_add_id(conn, uri);
-                    if(added_song != -1)
-                        mpd_run_play_id(conn, added_song);
-                    free(uri);
-                }
+            break;
+        case MPD_API_ADD_PLAY_TRACK:
+            if(sscanf(c->content, "MPD_API_ADD_PLAY_TRACK,%m[^\t\n]", &p_charbuf) && p_charbuf != NULL)
+            {
+                int_buf = mpd_run_add_id(mpd.conn, p_charbuf);
+                if(int_buf != -1)
+                    mpd_run_play_id(mpd.conn, int_buf);
+                free(p_charbuf);
             }
 #ifdef WITH_MPD_HOST_CHANGE
-            else if(!strncmp((const char *)in, MPD_API_SET_MPDHOST, sizeof(MPD_API_SET_MPDHOST)-1)) {
-                char *host;
-                int port = 0;
-                if(sscanf(in, "MPD_API_SET_MPDHOST,%d,%m[^\t\n ]", &port, &host) && host != NULL && port > 0) {
-                    strncpy(mpd_host, host, sizeof(mpd_host));
-                    free(host);
-                    mpd_port = port;
-                    mpd_conn_state = MPD_RECONNECT;
-                    break;
-                }
+        /* Commands allowed when disconnected from MPD server */
+        case MPD_API_SET_MPDHOST:
+            int_buf = 0;
+            if(sscanf(c->content, "MPD_API_SET_MPDHOST,%d,%m[^\t\n ]", &int_buf, &p_charbuf) && 
+                p_charbuf != NULL && int_buf > 0)
+            {
+                strncpy(mpd.host, p_charbuf, sizeof(mpd.host));
+                free(p_charbuf);
+                mpd.port = int_buf;
+                mpd.conn_state = MPD_RECONNECT;
+                return MG_CLIENT_CONTINUE;
             }
-            else if(!strncmp((const char *)in, MPD_API_GET_MPDHOST, sizeof(MPD_API_GET_MPDHOST)-1)) {
-                pss->do_send |= DO_SEND_MPDHOST;
+            break;
+        case MPD_API_GET_MPDHOST:
+            n = snprintf(mpd.buf, MAX_SIZE, "{\"type\":\"mpdhost\", \"data\": "
+                "{\"host\" : \"%s\", \"port\": \"%d\", \"passwort_set\": %s}"
+                "}", mpd.host, mpd.port, mpd.password ? "true" : "false");
+            printf("mpd_password is %p\n", mpd.password);
+        case MPD_API_SET_MPDPASS:
+            if(sscanf(c->content, "MPD_API_SET_MPDPASS,%m[^\t\n ]", &p_charbuf) && 
+                p_charbuf != NULL)
+            {
+                if(mpd.password)
+                    free(mpd.password);
+
+                mpd.password = p_charbuf;
+                mpd.conn_state = MPD_RECONNECT;
+                printf("Got mpd pw %s\n", mpd.password);
+                return MG_CLIENT_CONTINUE;
             }
+            break;
 #endif
+    }
 
-            if(mpd_conn_state == MPD_CONNECTED && mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS)
-                pss->do_send |= DO_SEND_ERROR;
-            break;
+    if(mpd.conn_state == MPD_CONNECTED && mpd_connection_get_error(mpd.conn) != MPD_ERROR_SUCCESS)
+    {
+        n = snprintf(mpd.buf, MAX_SIZE, "{\"type\":\"error\", \"data\": \"%s\"}", 
+            mpd_connection_get_error_message(mpd.conn));
 
-        default:
-            break;
+        /* Try to recover error */
+        if (!mpd_connection_clear_error(mpd.conn))
+            mpd.conn_state = MPD_FAILURE;
     }
 
+    if(n > 0)
+        mg_websocket_write(c, 1, mpd.buf, n);
+
+    return MG_CLIENT_CONTINUE;
+}
+
+int mpd_close_handler(struct mg_connection *c)
+{
+    /* Cleanup session data */
+    if(c->connection_param)
+        free(c->connection_param);
     return 0;
 }
 
-void mpd_loop()
+static int mpd_notify_callback(struct mg_connection *c) {
+    size_t n;
+
+    if(!c->is_websocket)
+        return MG_REQUEST_PROCESSED;
+
+    if(c->callback_param)
+    {
+        /* error message? */
+        n = snprintf(mpd.buf, MAX_SIZE, "{\"type\":\"error\",\"data\":\"%s\"}", 
+            (const char *)c->callback_param);
+
+        mg_websocket_write(c, 1, mpd.buf, n);
+        return MG_REQUEST_PROCESSED;
+    }
+
+    if(!c->connection_param)
+        c->connection_param = calloc(1, sizeof(struct t_mpd_client_session));
+
+    struct t_mpd_client_session *s = (struct t_mpd_client_session *)c->connection_param;
+
+    if(mpd.conn_state != MPD_CONNECTED) {
+        n = snprintf(mpd.buf, MAX_SIZE, "{\"type\":\"disconnected\"}");
+        mg_websocket_write(c, 1, mpd.buf, n);
+    }
+    else
+    {
+        mg_websocket_write(c, 1, mpd.buf, mpd.buf_size);
+
+        if(s->song_id != mpd.song_id)
+        {
+            n = mpd_put_current_song(mpd.buf);
+            mg_websocket_write(c, 1, mpd.buf, n);
+            s->song_id = mpd.song_id;
+        }
+
+        if(s->queue_version != mpd.queue_version)
+        {
+            n = snprintf(mpd.buf, MAX_SIZE, "{\"type\":\"update_playlist\"}");
+            mg_websocket_write(c, 1, mpd.buf, n);
+            s->queue_version = mpd.queue_version;
+        }
+    }
+
+    return MG_REQUEST_PROCESSED;
+}
+
+void mpd_poll(struct mg_server *s)
 {
-    switch (mpd_conn_state) {
+    switch (mpd.conn_state) {
         case MPD_DISCONNECTED:
             /* Try to connect */
-            lwsl_notice("MPD Connecting to %s:%d\n", mpd_host, mpd_port);
-            conn = mpd_connection_new(mpd_host, mpd_port, 3000);
-            if (conn == NULL) {
-                lwsl_err("Out of memory.");
-                mpd_conn_state = MPD_FAILURE;
+            fprintf(stdout, "MPD Connecting to %s:%d\n", mpd.host, mpd.port);
+            mpd.conn = mpd_connection_new(mpd.host, mpd.port, 3000);
+            if (mpd.conn == NULL) {
+                fprintf(stderr, "Out of memory.");
+                mpd.conn_state = MPD_FAILURE;
                 return;
             }
 
-            if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS) {
-                lwsl_err("MPD connection: %s\n", mpd_connection_get_error_message(conn));
-                mpd_conn_state = MPD_FAILURE;
+            if (mpd_connection_get_error(mpd.conn) != MPD_ERROR_SUCCESS) {
+                fprintf(stderr, "MPD connection: %s\n", mpd_connection_get_error_message(mpd.conn));
+                mg_iterate_over_connections(s, mpd_notify_callback, 
+                    (void *)mpd_connection_get_error_message(mpd.conn));
+                mpd.conn_state = MPD_FAILURE;
                 return;
             }
 
-            lwsl_notice("MPD connected.\n");
-            mpd_conn_state = MPD_CONNECTED;
+            if(mpd.password && !mpd_run_password(mpd.conn, mpd.password))
+            {
+                fprintf(stderr, "MPD connection: %s\n", mpd_connection_get_error_message(mpd.conn));
+                mg_iterate_over_connections(s, mpd_notify_callback, 
+                    (void *)mpd_connection_get_error_message(mpd.conn));
+                mpd.conn_state = MPD_FAILURE;
+                return;
+            }
+
+            fprintf(stderr, "MPD connected.\n");
+            mpd.conn_state = MPD_CONNECTED;
             break;
 
         case MPD_FAILURE:
-            lwsl_err("MPD connection failed.\n");
+            fprintf(stderr, "MPD connection failed.\n");
 
+        case MPD_DISCONNECT:
         case MPD_RECONNECT:
-            if(conn != NULL)
-                mpd_connection_free(conn);
-            conn = NULL;
-            mpd_conn_state = MPD_DISCONNECTED;
+            if(mpd.conn != NULL)
+                mpd_connection_free(mpd.conn);
+            mpd.conn = NULL;
+            mpd.conn_state = MPD_DISCONNECTED;
             break;
 
         case MPD_CONNECTED:
-            /* Nothing to do */
+            mpd.buf_size = mpd_put_state(mpd.buf, &mpd.song_id, &mpd.queue_version);
+            mg_iterate_over_connections(s, mpd_notify_callback, NULL);
             break;
     }
 }
@@ -308,10 +327,10 @@ int mpd_put_state(char *buffer, int *current_song_id, unsigned *queue_version)
     struct mpd_status *status;
     int len;
 
-    status = mpd_run_status(conn);
+    status = mpd_run_status(mpd.conn);
     if (!status) {
-        lwsl_err("MPD mpd_run_status: %s\n", mpd_connection_get_error_message(conn));
-        mpd_conn_state = MPD_FAILURE;
+        fprintf(stderr, "MPD mpd_run_status: %s\n", mpd_connection_get_error_message(mpd.conn));
+        mpd.conn_state = MPD_FAILURE;
         return 0;
     }
 
@@ -345,7 +364,7 @@ int mpd_put_current_song(char *buffer)
     const char *end = buffer + MAX_SIZE;
     struct mpd_song *song;
 
-    song = mpd_run_current_song(conn);
+    song = mpd_run_current_song(mpd.conn);
     if(song == NULL)
         return 0;
 
@@ -362,7 +381,7 @@ int mpd_put_current_song(char *buffer)
 
     cur += snprintf(cur, end - cur, "}}");
     mpd_song_free(song);
-    mpd_response_finish(conn);
+    mpd_response_finish(mpd.conn);
 
     return cur - buffer;
 }
@@ -373,19 +392,19 @@ int mpd_put_playlist(char *buffer)
     const char *end = buffer + MAX_SIZE;
     struct mpd_entity *entity;
 
-    if (!mpd_send_list_queue_meta(conn)) {
-        lwsl_err("MPD mpd_send_list_queue_meta: %s\n", mpd_connection_get_error_message(conn));
+    if (!mpd_send_list_queue_meta(mpd.conn)) {
+        fprintf(stderr, "MPD mpd_send_list_queue_meta: %s\n", mpd_connection_get_error_message(mpd.conn));
         cur += snprintf(cur, end  - cur, "{\"type\":\"error\",\"data\":\"%s\"}", 
-            mpd_connection_get_error_message(conn));
+            mpd_connection_get_error_message(mpd.conn));
 
-        if (!mpd_connection_clear_error(conn))
-            mpd_conn_state = MPD_FAILURE;
+        if (!mpd_connection_clear_error(mpd.conn))
+            mpd.conn_state = MPD_FAILURE;
         return cur - buffer;
     }
 
     cur += snprintf(cur, end  - cur, "{\"type\": \"playlist\", \"data\": [ ");
 
-    while((entity = mpd_recv_entity(conn)) != NULL) {
+    while((entity = mpd_recv_entity(mpd.conn)) != NULL) {
         const struct mpd_song *song;
 
         if(mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
@@ -413,18 +432,18 @@ int mpd_put_browse(char *buffer, char *path)
     const char *end = buffer + MAX_SIZE;
     struct mpd_entity *entity;
 
-    if (!mpd_send_list_meta(conn, path)) {
-        lwsl_err("MPD mpd_send_list_meta: %s\n", mpd_connection_get_error_message(conn));
+    if (!mpd_send_list_meta(mpd.conn, path)) {
+        fprintf(stderr, "MPD mpd_send_list_meta: %s\n", mpd_connection_get_error_message(mpd.conn));
         cur += snprintf(cur, end  - cur, "{\"type\":\"error\",\"data\":\"%s\"}", 
-            mpd_connection_get_error_message(conn));
+            mpd_connection_get_error_message(mpd.conn));
 
-        if (!mpd_connection_clear_error(conn))
-            mpd_conn_state = MPD_FAILURE;
+        if (!mpd_connection_clear_error(mpd.conn))
+            mpd.conn_state = MPD_FAILURE;
         return cur - buffer;
     }
     cur += snprintf(cur, end  - cur, "{\"type\":\"browse\",\"data\":[ ");
 
-    while((entity = mpd_recv_entity(conn)) != NULL) {
+    while((entity = mpd_recv_entity(mpd.conn)) != NULL) {
         const struct mpd_song *song;
         const struct mpd_directory *dir;
         const struct mpd_playlist *pl;
@@ -463,9 +482,9 @@ int mpd_put_browse(char *buffer, char *path)
         mpd_entity_free(entity);
     }
 
-    if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS || !mpd_response_finish(conn)) {
-        lwsl_err("MPD mpd_send_list_meta: %s\n", mpd_connection_get_error_message(conn));
-        mpd_conn_state = MPD_FAILURE;
+    if (mpd_connection_get_error(mpd.conn) != MPD_ERROR_SUCCESS || !mpd_response_finish(mpd.conn)) {
+        fprintf(stderr, "MPD mpd_send_list_meta: %s\n", mpd_connection_get_error_message(mpd.conn));
+        mpd.conn_state = MPD_FAILURE;
         return 0;
     }
 
@@ -474,3 +493,9 @@ int mpd_put_browse(char *buffer, char *path)
     cur += snprintf(cur, end  - cur, "] }");
     return cur - buffer;
 }
+
+void mpd_disconnect()
+{
+    mpd.conn_state = MPD_DISCONNECT;
+    mpd_poll(NULL);
+}
\ No newline at end of file
diff --git a/src/mpd_client.h b/src/mpd_client.h
index 5ca70d6..cfa1267 100644
--- a/src/mpd_client.h
+++ b/src/mpd_client.h
@@ -29,68 +29,75 @@
 #ifndef __MPD_CLIENT_H__
 #define __MPD_CLIENT_H__
 
-#include 
+#include "mongoose.h"
 
 #define MAX_SIZE 1024 * 100
+#define GEN_ENUM(X) X,
+#define GEN_STR(X) #X,
+#define MPD_CMDS(X) \
+    X(MPD_API_GET_PLAYLIST) \
+    X(MPD_API_GET_BROWSE) \
+    X(MPD_API_GET_MPDHOST) \
+    X(MPD_API_ADD_TRACK) \
+    X(MPD_API_ADD_PLAY_TRACK) \
+    X(MPD_API_PLAY_TRACK) \
+    X(MPD_API_RM_TRACK) \
+    X(MPD_API_RM_ALL) \
+    X(MPD_API_SET_VOLUME) \
+    X(MPD_API_SET_PAUSE) \
+    X(MPD_API_SET_PLAY) \
+    X(MPD_API_SET_STOP) \
+    X(MPD_API_SET_SEEK) \
+    X(MPD_API_SET_NEXT) \
+    X(MPD_API_SET_PREV) \
+    X(MPD_API_SET_MPDHOST) \
+    X(MPD_API_SET_MPDPASS) \
+    X(MPD_API_UPDATE_DB) \
+    X(MPD_API_TOGGLE_RANDOM) \
+    X(MPD_API_TOGGLE_CONSUME) \
+    X(MPD_API_TOGGLE_SINGLE) \
+    X(MPD_API_TOGGLE_REPEAT)
 
-#define DO_SEND_STATE      (1 << 0)
-#define DO_SEND_PLAYLIST   (1 << 1)
-#define DO_SEND_TRACK_INFO (1 << 2)
-#define DO_SEND_BROWSE     (1 << 3)
-#define DO_SEND_ERROR      (1 << 4)
-#define DO_SEND_MPDHOST    (1 << 5)
-
-#define MPD_API_GET_SEEK         "MPD_API_GET_SEEK"
-#define MPD_API_GET_PLAYLIST     "MPD_API_GET_PLAYLIST"
-#define MPD_API_GET_TRACK_INFO   "MPD_API_GET_TRACK_INFO"
-#define MPD_API_GET_BROWSE       "MPD_API_GET_BROWSE"
-#define MPD_API_GET_MPDHOST      "MPD_API_GET_MPDHOST"
-#define MPD_API_ADD_TRACK        "MPD_API_ADD_TRACK"
-#define MPD_API_ADD_PLAY_TRACK   "MPD_API_ADD_PLAY_TRACK"
-#define MPD_API_PLAY_TRACK       "MPD_API_PLAY_TRACK"
-#define MPD_API_RM_TRACK         "MPD_API_RM_TRACK"
-#define MPD_API_RM_ALL           "MPD_API_RM_ALL"
-#define MPD_API_SET_VOLUME       "MPD_API_SET_VOLUME"
-#define MPD_API_SET_PAUSE        "MPD_API_SET_PAUSE"
-#define MPD_API_SET_PLAY         "MPD_API_SET_PLAY"
-#define MPD_API_SET_STOP         "MPD_API_SET_STOP"
-#define MPD_API_SET_SEEK         "MPD_API_SET_SEEK"
-#define MPD_API_SET_NEXT         "MPD_API_SET_PREV"
-#define MPD_API_SET_PREV         "MPD_API_SET_NEXT"
-#define MPD_API_SET_MPDHOST      "MPD_API_SET_MPDHOST"
-#define MPD_API_UPDATE_DB        "MPD_API_UPDATE_DB"
-#define MPD_API_TOGGLE_RANDOM    "MPD_API_TOGGLE_RANDOM"
-#define MPD_API_TOGGLE_CONSUME   "MPD_API_TOGGLE_CONSUME"
-#define MPD_API_TOGGLE_SINGLE    "MPD_API_TOGGLE_SINGLE"
-#define MPD_API_TOGGLE_REPEAT    "MPD_API_TOGGLE_REPEAT"
-
-struct per_session_data__ympd {
-    int do_send;
-    unsigned queue_version;
-    int current_song_id;
-    char *browse_path;
+enum mpd_cmd_ids {
+    MPD_CMDS(GEN_ENUM)
 };
 
 enum mpd_conn_states {
-    MPD_FAILURE,
     MPD_DISCONNECTED,
+    MPD_FAILURE,
     MPD_CONNECTED,
-    MPD_RECONNECT
+    MPD_RECONNECT,
+    MPD_DISCONNECT
 };
 
-void *mpd_idle_connection(void *_data);
-int callback_ympd(struct libwebsocket_context *context,
-        struct libwebsocket *wsi,
-        enum libwebsocket_callback_reasons reason,
-        void *user, void *in, size_t len);
-void mpd_loop();
+struct t_mpd {
+    int port;
+    char host[128];
+    char *password;
+
+    struct mpd_connection *conn;
+    enum mpd_conn_states conn_state;
+
+    /* Reponse Buffer */
+    char buf[MAX_SIZE];
+    size_t buf_size;
+
+    int song_id;
+    unsigned queue_version;
+} mpd;
+
+struct t_mpd_client_session {
+    int song_id;
+    unsigned queue_version;
+};
+
+void mpd_poll(struct mg_server *s);
+int callback_mpd(struct mg_connection *c);
+int mpd_close_handler(struct mg_connection *c);
 int mpd_put_state(char *buffer, int *current_song_id, unsigned *queue_version);
 int mpd_put_current_song(char *buffer);
 int mpd_put_playlist(char *buffer);
 int mpd_put_browse(char *buffer, char *path);
-
-int mpd_port;
-char mpd_host[255];
-
+void mpd_disconnect();
 #endif
 
diff --git a/src/urldecode.c b/src/urldecode.c
deleted file mode 100644
index 8a38ac4..0000000
--- a/src/urldecode.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
-    from http://www.geekhideout.com/urlcode.shtml
-    public domain
-*/
-
-#include 
-#include 
-#include 
-
-/* Converts a hex character to its integer value */
-char from_hex(char ch) {
-  return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
-}
-
-/* Converts an integer value to its hex character*/
-char to_hex(char code) {
-  static char hex[] = "0123456789abcdef";
-  return hex[code & 15];
-}
-
-/* Returns a url-decoded version of str */
-/* IMPORTANT: be sure to free() the returned string after use */
-char *url_decode(char *str) {
-  char *pstr = str, *buf = malloc(strlen(str) + 1), *pbuf = buf;
-  while (*pstr) {
-    if (*pstr == '%') {
-      if (pstr[1] && pstr[2]) {
-        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
-        pstr += 2;
-      }
-    } else if (*pstr == '+') { 
-      *pbuf++ = ' ';
-    } else {
-      *pbuf++ = *pstr;
-    }
-    pstr++;
-  }
-  *pbuf = '\0';
-  return buf;
-}
diff --git a/src/ympd.c b/src/ympd.c
index 92a28d8..c57496c 100644
--- a/src/ympd.c
+++ b/src/ympd.c
@@ -26,39 +26,20 @@
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
-#include 
 #include 
 #include 
 #include 
 #include 
 #include 
 #include 
+#include 
 
+#include "mongoose.h"
 #include "http_server.h"
 #include "mpd_client.h"
 #include "config.h"
 
 extern char *optarg;
-extern char *resource_path;
-
-struct libwebsocket_protocols protocols[] = {
-    /* first protocol must always be HTTP handler */
-    {
-        "http-only",		/* name */
-        callback_http,		/* callback */
-        sizeof (struct per_session_data__http),	/* per_session_data_size */
-        0,			/* max frame size / rx buffer */
-    },
-    {
-        "ympd-client",
-        callback_ympd,
-        sizeof(struct per_session_data__ympd),
-        255,
-        0,
-    },
-
-    { NULL, NULL, 0, 0, 0 } /* terminator */
-};
 
 int force_exit = 0;
 
@@ -67,80 +48,62 @@ void bye()
     force_exit = 1;
 }
 
+static int server_callback(struct mg_connection *c) {
+
+    //printf("Got REQ: (%lu) WS:%d\n", c->content_len, c->is_websocket);
+    //fwrite(c->content, c->content_len, 1, stdout);
+    //printf("\n");
+
+    if (c->is_websocket)
+    {
+        c->content[c->content_len] = '\0';
+        if(c->content_len)
+            return callback_mpd(c);
+        else
+            return MG_CLIENT_CONTINUE;
+    }
+    else
+        return callback_http(c);
+}
+
 int main(int argc, char **argv)
 {
-    int n, gid = -1, uid = -1;
-    int option_index = 0;
-    unsigned int oldus = 0;
-    struct libwebsocket_context *context;
-    struct lws_context_creation_info info;
-    const char *cert_filepath = NULL;
-    const char *private_key_filepath = NULL;
-    const char *iface = NULL;
+    int n, option_index = 0;
+    struct mg_server *server = mg_create_server(NULL);
+    unsigned int current_timer = 0, last_timer = 0;
 
     atexit(bye);
-    memset(&info, 0, sizeof info);
-    info.port = 8080;
-    strcpy(mpd_host, "127.0.0.1");
-    mpd_port = 6600;
-    lws_set_log_level(LLL_ERR | LLL_WARN, NULL);
+    mg_set_option(server, "listening_port", "8080");
+    mpd.port = 6600;
+    strcpy(mpd.host, "127.0.0.1");
 
     static struct option long_options[] = {
         {"host",         required_argument, 0, 'h'},
         {"port",         required_argument, 0, 'p'},
-        {"interface",    required_argument, 0, 'i'},
         {"webport",      required_argument, 0, 'w'},
-        {"resourcepath", required_argument, 0, 'r'},
-        {"ssl_cert",     required_argument, 0, 'c'},
-        {"ssl_key",      required_argument, 0, 'k'},
-        {"gid",          required_argument, 0, 'g'},
-        {"uid",          required_argument, 0, 'u'},
-        {"verbose",      optional_argument, 0, 'v'},
+        {"user",         required_argument, 0, 'u'},
         {"version",      no_argument,       0, 'V'},
         {"help",         no_argument,       0,  0 },
         {0,              0,                 0,  0 }
     };
 
-    while((n = getopt_long(argc, argv, "h:p:i:w:r:c:k:g:u:v::V",
+    while((n = getopt_long(argc, argv, "h:p:w:u::V",
                 long_options, &option_index)) != -1) {
         switch (n) {
             case 'h':
-                strncpy(mpd_host, optarg, sizeof(mpd_host));
+                strncpy(mpd.host, optarg, sizeof(mpd.host));
                 break;
             case 'p':
-                mpd_port = atoi(optarg);
-            case 'i':
-                iface = optarg;
-                break;
+                mpd.port = atoi(optarg);
             case 'w':
-                info.port = atoi(optarg);
-                break;
-            case 'r':
-                resource_path = optarg;
-                break;
-            case 'c':
-                cert_filepath = optarg;
-                break;
-            case 'k':
-                private_key_filepath = optarg;
-                break;
-            case 'g':
-                gid = atoi(optarg);
+                mg_set_option(server, "listening_port", optarg);
                 break;
             case 'u':
-                uid = atoi(optarg);
-                break;
-            case 'v':
-                if(optarg)
-                    lws_set_log_level(strtol(optarg, NULL, 10), NULL);
-                else
-                    lws_set_log_level(LLL_ERR | LLL_WARN | 
-                            LLL_NOTICE | LLL_INFO, NULL);
+                mg_set_option(server, "run_as_user", optarg);
                 break;
             case 'V':
                 fprintf(stdout, "ympd  %d.%d.%d\n"
-                        "Copyright (C) 2014 Andrew Karpow \n"
-                        "Resource Path: "LOCAL_RESOURCE_PATH"\n"
+                        "Copyright (C) 2014 Andrew Karpow \n"
                         "built " __DATE__ " "__TIME__ " ("__VERSION__")\n",
                         YMPD_VERSION_MAJOR, YMPD_VERSION_MINOR, YMPD_VERSION_PATCH);
                 return EXIT_SUCCESS;
@@ -149,14 +112,8 @@ int main(int argc, char **argv)
                 fprintf(stderr, "Usage: %s [OPTION]...\n\n"
                         "\t-h, --host \t\tconnect to mpd at host [localhost]\n"
                         "\t-p, --port \t\tconnect to mpd at port [6600]\n"
-                        "\t-i, --interface \tlisten interface for webserver [all]\n"
-                        "\t-w, --webport \t\tlisten port for webserver [8080]\n"
-                        "\t-r, --resourcepath \tresourcepath for webserver [" LOCAL_RESOURCE_PATH "]\n"
-                        "\t-c, --ssl_cert \tssl certificate ssl_private_key_filepath\n"
-                        "\t-k, --ssl_key \tssl private key filepath\n"
-                        "\t-u, --uid \t\t\tuser-id after socket bind\n"
-                        "\t-g, --gid \t\t\tgroup-id after socket bind\n"
-                        "\t-v, --verbose[]\t\tverbosity level\n" 
+                        "\t-w, --webport [ip:]\t\tlisten interface/port for webserver [8080]\n"
+                        "\t-u, --user \t\t\tdrop priviliges to user after socket bind\n"
                         "\t-V, --version\t\t\tget version\n"
                         "\t--help\t\t\t\tthis help\n"
                         , argv[0]);
@@ -164,52 +121,19 @@ int main(int argc, char **argv)
         }
     }
 
-    if(cert_filepath != NULL && private_key_filepath == NULL) {
-        lwsl_err("private key filepath needed\n");
-        return EXIT_FAILURE;
-    }
-
-    if(private_key_filepath != NULL && cert_filepath == NULL) {
-        lwsl_err("public cert filepath needed\n");
-        return EXIT_FAILURE;
-    }
-
-    info.ssl_cert_filepath = cert_filepath;
-    info.ssl_private_key_filepath = private_key_filepath;
-    info.iface = iface;
-    info.protocols = protocols;
-    info.extensions = libwebsocket_get_internal_extensions();
-    info.gid = gid;
-    info.uid = uid;
-    info.options = 0;
-
-    context = libwebsocket_create_context(&info);
-    if (context == NULL) {
-        lwsl_err("libwebsocket init failed\n");
-        return EXIT_FAILURE;
-    }
-
-    n = 0;
-    while (n >= 0 && !force_exit) {
-        struct timeval tv;
-
-        gettimeofday(&tv, NULL);
-
-        /*
-         * This provokes the LWS_CALLBACK_SERVER_WRITEABLE for every
-         * live websocket connection using the DUMB_INCREMENT protocol,
-         * as soon as it can take more packets (usually immediately)
-         */
-
-        if (((unsigned int)tv.tv_usec - oldus) > 1000 * 500) {
-            mpd_loop();
-            libwebsocket_callback_on_writable_all_protocol(&protocols[1]);
-            oldus = tv.tv_usec;
+    mg_set_http_close_handler(server, mpd_close_handler);
+    mg_set_request_handler(server, server_callback);
+    while (!force_exit) {
+        current_timer = mg_poll_server(server, 200);
+        if(current_timer - last_timer)
+        {
+            last_timer = current_timer;
+            mpd_poll(server);
         }
-
-        n = libwebsocket_service(context, 50);
     }
 
-    libwebsocket_context_destroy(context);
-    return 0;
+    mpd_disconnect();
+    mg_destroy_server(&server);
+
+    return EXIT_SUCCESS;
 }
-- 
2.20.1


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