1 // Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
2 // Copyright (c) 2013-2014 Cesanta Software Limited
5 // This library is dual-licensed: you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License version 2 as
7 // published by the Free Software Foundation. For the terms of this
8 // license, see <http://www.gnu.org/licenses/>.
10 // You are free to use this library under the terms of the GNU General
11 // Public License, but WITHOUT ANY WARRANTY; without even the implied
12 // warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 // See the GNU General Public License for more details.
15 // Alternatively, you can license this library under a commercial
16 // license, as set out in <http://cesanta.com/>.
18 #undef UNICODE // Use ANSI WinAPI functions
19 #undef _UNICODE // Use multibyte encoding on Windows
20 #define _MBCS // Use multibyte encoding on Windows
21 #define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows
22 #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+
23 #undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h
24 #define _XOPEN_SOURCE 600 // For flockfile() on Linux
25 #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
26 #define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
27 #define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions
28 #define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets
31 #pragma warning (disable : 4127) // FD_SET() emits warning, disable it
32 #pragma warning (disable : 4204) // missing c99 support
35 #include <sys/types.h>
50 #include <process.h> // For _beginthread
51 #include <io.h> // For _lseeki64
52 #include <direct.h> // For _mkdir
53 typedef int socklen_t;
54 #if !defined(__MINGW32__) || !defined(_PID_T_) || defined(_NO_OLDNAMES)
57 typedef SOCKET sock_t;
58 typedef unsigned char uint8_t;
59 typedef unsigned int uint32_t;
60 typedef unsigned short uint16_t;
61 typedef unsigned __int64 uint64_t;
62 typedef __int64 int64_t;
63 typedef CRITICAL_SECTION mutex_t;
64 typedef struct _stati64 file_stat_t;
65 #pragma comment(lib, "ws2_32.lib")
66 #define snprintf _snprintf
67 #define vsnprintf _vsnprintf
68 #define INT64_FMT "I64d"
70 #define EINPROGRESS WSAEINPROGRESS
73 #define EWOULDBLOCK WSAEWOULDBLOCK
75 #define mutex_init(x) InitializeCriticalSection(x)
76 #define mutex_destroy(x) DeleteCriticalSection(x)
77 #define mutex_lock(x) EnterCriticalSection(x)
78 #define mutex_unlock(x) LeaveCriticalSection(x)
79 #define get_thread_id() ((unsigned long) GetCurrentThreadId())
81 #define S_ISDIR(x) ((x) & _S_IFDIR)
83 #define sleep(x) Sleep((x) * 1000)
84 #define stat(x, y) mg_stat((x), (y))
85 #define fopen(x, y) mg_fopen((x), (y))
86 #define open(x, y) mg_open((x), (y))
87 #define lseek(x, y, z) _lseeki64((x), (y), (z))
88 #define mkdir(x, y) _mkdir(x)
89 #define to64(x) _atoi64(x)
91 #define funlockfile(x)
93 #define va_copy(x,y) x = y
94 #endif // MINGW #defines va_copy
97 #define STR(x) STRX(x)
98 #define __func__ __FILE__ ":" STR(__LINE__)
102 #include <inttypes.h>
108 #include <arpa/inet.h> // For inet_pton() when MONGOOSE_USE_IPV6 is defined
109 #include <netinet/in.h>
110 #include <sys/socket.h>
111 #include <sys/select.h>
112 #define closesocket(x) close(x)
114 typedef pthread_mutex_t mutex_t;
115 typedef struct stat file_stat_t;
116 #define mutex_init(x) pthread_mutex_init(x, NULL)
117 #define mutex_destroy(x) pthread_mutex_destroy(x)
118 #define mutex_lock(x) pthread_mutex_lock(x)
119 #define mutex_unlock(x) pthread_mutex_unlock(x)
120 #define get_thread_id() ((unsigned long) pthread_self())
121 #define INVALID_SOCKET ((sock_t) -1)
122 #define INT64_FMT PRId64
123 #define to64(x) strtoll(x, NULL, 10)
128 #ifdef MONGOOSE_USE_SSL
130 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
132 #include <openssl/ssl.h>
135 #include "mongoose.h"
137 struct ll { struct ll *prev, *next; };
138 #define LINKED_LIST_INIT(N) ((N)->next = (N)->prev = (N))
139 #define LINKED_LIST_DECLARE_AND_INIT(H) struct ll H = { &H, &H }
140 #define LINKED_LIST_ENTRY(P,T,N) ((T *)((char *)(P) - offsetof(T, N)))
141 #define LINKED_LIST_IS_EMPTY(N) ((N)->next == (N))
142 #define LINKED_LIST_FOREACH(H,N,T) \
143 for (N = (H)->next, T = (N)->next; N != (H); N = (T), T = (N)->next)
144 #define LINKED_LIST_ADD_TO_FRONT(H,N) do { ((H)->next)->prev = (N); \
145 (N)->next = ((H)->next); (N)->prev = (H); (H)->next = (N); } while (0)
146 #define LINKED_LIST_ADD_TO_TAIL(H,N) do { ((H)->prev)->next = (N); \
147 (N)->prev = ((H)->prev); (N)->next = (H); (H)->prev = (N); } while (0)
148 #define LINKED_LIST_REMOVE(N) do { ((N)->next)->prev = ((N)->prev); \
149 ((N)->prev)->next = ((N)->next); LINKED_LIST_INIT(N); } while (0)
151 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
152 #define MAX_REQUEST_SIZE 16384
153 #define IOBUF_SIZE 8192
154 #define MAX_PATH_SIZE 8192
155 #define LUA_SCRIPT_PATTERN "**.lp$"
156 #define DEFAULT_CGI_PATTERN "**.cgi$|**.pl$|**.php$"
157 #define CGI_ENVIRONMENT_SIZE 4096
158 #define MAX_CGI_ENVIR_VARS 64
159 #define ENV_EXPORT_TO_CGI "MONGOOSE_CGI"
160 #define PASSWORDS_FILE_NAME ".htpasswd"
162 #ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL
163 #define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5
166 // Extra HTTP headers to send in every static file reply
167 #if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS)
168 #define MONGOOSE_USE_EXTRA_HTTP_HEADERS ""
171 #ifndef MONGOOSE_USE_POST_SIZE_LIMIT
172 #define MONGOOSE_USE_POST_SIZE_LIMIT 0
175 #ifndef MONGOOSE_USE_IDLE_TIMEOUT_SECONDS
176 #define MONGOOSE_USE_IDLE_TIMEOUT_SECONDS 30
179 #ifdef MONGOOSE_ENABLE_DEBUG
180 #define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \
181 fflush(stdout); } while(0)
186 #ifdef MONGOOSE_NO_FILESYSTEM
187 #define MONGOOSE_NO_AUTH
188 #define MONGOOSE_NO_CGI
189 #define MONGOOSE_NO_DAV
190 #define MONGOOSE_NO_DIRECTORY_LISTING
191 #define MONGOOSE_NO_LOGGING
194 union socket_address {
196 struct sockaddr_in sin;
197 #ifdef MONGOOSE_USE_IPV6
198 struct sockaddr_in6 sin6;
207 // For directory listing and WevDAV support
209 struct connection *conn;
214 // NOTE(lsm): this enum shoulds be in sync with the config_options.
217 #ifndef MONGOOSE_NO_FILESYSTEM
219 #ifndef MONGOOSE_NO_AUTH
222 #ifndef MONGOOSE_NO_CGI
226 #ifndef MONGOOSE_NO_DAV
230 #ifndef MONGOOSE_NO_DIRECTORY_LISTING
231 ENABLE_DIRECTORY_LISTING,
235 #if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH)
239 #ifndef MONGOOSE_NO_FILESYSTEM
246 #ifdef MONGOOSE_USE_SSL
253 static const char *static_config_options[] = {
254 "access_control_list", NULL,
255 #ifndef MONGOOSE_NO_FILESYSTEM
256 "access_log_file", NULL,
257 #ifndef MONGOOSE_NO_AUTH
258 "auth_domain", "mydomain.com",
260 #ifndef MONGOOSE_NO_CGI
261 "cgi_interpreter", NULL,
262 "cgi_pattern", DEFAULT_CGI_PATTERN,
264 #ifndef MONGOOSE_NO_DAV
265 "dav_auth_file", NULL,
267 "document_root", NULL,
268 #ifndef MONGOOSE_NO_DIRECTORY_LISTING
269 "enable_directory_listing", "yes",
272 "extra_mime_types", NULL,
273 #if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH)
274 "global_auth_file", NULL,
276 "hide_files_patterns", NULL,
277 #ifndef MONGOOSE_NO_FILESYSTEM
278 "index_files","index.html,index.htm,index.cgi,index.php,index.lp",
280 "listening_port", NULL,
284 #ifdef MONGOOSE_USE_SSL
285 "ssl_certificate", NULL,
287 "url_rewrites", NULL,
292 sock_t listening_sock;
293 union socket_address lsa; // Listening socket address
294 struct ll active_connections;
295 mg_handler_t request_handler;
296 mg_handler_t error_handler;
297 mg_handler_t auth_handler;
298 char *config_options[NUM_OPTIONS];
301 #ifdef MONGOOSE_USE_SSL
302 SSL_CTX *ssl_ctx; // Server SSL context
303 SSL_CTX *client_ssl_ctx; // Client SSL context
305 sock_t ctl[2]; // Control socketpair. Used to wake up from select() call
308 // Expandable IO buffer
310 char *buf; // Buffer that holds the data
311 int size; // Buffer size
312 int len; // Number of bytes currently in a buffer
315 // Local endpoint representation
317 int fd; // Opened regular local file
318 sock_t cgi_sock; // CGI socket
319 void *ssl; // SSL descriptor
322 enum endpoint_type { EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT };
323 enum connection_flags {
324 CONN_CLOSE = 1, // Connection must be closed at the end of the poll
325 CONN_SPOOL_DONE = 2, // All data has been buffered for sending
326 CONN_SSL_HANDS_SHAKEN = 4, // SSL handshake has completed. Only for SSL
327 CONN_HEADERS_SENT = 8, // User callback has sent HTTP headers
328 CONN_BUFFER = 16, // CGI only. Holds data send until CGI prints
330 CONN_CONNECTING = 32, // HTTP client is doing non-blocking connect()
331 CONN_LONG_RUNNING = 64 // Long-running URI handlers
335 struct mg_connection mg_conn; // XXX: Must be first
336 struct ll link; // Linkage to server->active_connections
337 struct mg_server *server;
338 sock_t client_sock; // Connected client
339 struct iobuf local_iobuf;
340 struct iobuf remote_iobuf;
341 union endpoint endpoint;
342 enum endpoint_type endpoint_type;
344 time_t last_activity_time;
347 int64_t num_bytes_sent; // Total number of bytes sent
348 int64_t cl; // Reply content length, for Range support
349 int request_len; // Request length, including last \r\n after last header
350 int flags; // CONN_* flags: CONN_CLOSE, CONN_SPOOL_DONE, etc
351 mg_handler_t handler; // Callback for HTTP client
352 #ifdef MONGOOSE_USE_SSL
353 SSL *ssl; // SSL descriptor
357 static void open_local_endpoint(struct connection *conn, int skip_user);
358 static void close_local_endpoint(struct connection *conn);
360 static const struct {
361 const char *extension;
363 const char *mime_type;
364 } static_builtin_mime_types[] = {
365 {".html", 5, "text/html"},
366 {".htm", 4, "text/html"},
367 {".shtm", 5, "text/html"},
368 {".shtml", 6, "text/html"},
369 {".css", 4, "text/css"},
370 {".js", 3, "application/x-javascript"},
371 {".ico", 4, "image/x-icon"},
372 {".gif", 4, "image/gif"},
373 {".jpg", 4, "image/jpeg"},
374 {".jpeg", 5, "image/jpeg"},
375 {".png", 4, "image/png"},
376 {".svg", 4, "image/svg+xml"},
377 {".txt", 4, "text/plain"},
378 {".torrent", 8, "application/x-bittorrent"},
379 {".wav", 4, "audio/x-wav"},
380 {".mp3", 4, "audio/x-mp3"},
381 {".mid", 4, "audio/mid"},
382 {".m3u", 4, "audio/x-mpegurl"},
383 {".ogg", 4, "application/ogg"},
384 {".ram", 4, "audio/x-pn-realaudio"},
385 {".xml", 4, "text/xml"},
386 {".json", 5, "text/json"},
387 {".xslt", 5, "application/xml"},
388 {".xsl", 4, "application/xml"},
389 {".ra", 3, "audio/x-pn-realaudio"},
390 {".doc", 4, "application/msword"},
391 {".exe", 4, "application/octet-stream"},
392 {".zip", 4, "application/x-zip-compressed"},
393 {".xls", 4, "application/excel"},
394 {".tgz", 4, "application/x-tar-gz"},
395 {".tar", 4, "application/x-tar"},
396 {".gz", 3, "application/x-gunzip"},
397 {".arj", 4, "application/x-arj-compressed"},
398 {".rar", 4, "application/x-arj-compressed"},
399 {".rtf", 4, "application/rtf"},
400 {".pdf", 4, "application/pdf"},
401 {".swf", 4, "application/x-shockwave-flash"},
402 {".mpg", 4, "video/mpeg"},
403 {".webm", 5, "video/webm"},
404 {".mpeg", 5, "video/mpeg"},
405 {".mov", 4, "video/quicktime"},
406 {".mp4", 4, "video/mp4"},
407 {".m4v", 4, "video/x-m4v"},
408 {".asf", 4, "video/x-ms-asf"},
409 {".avi", 4, "video/x-msvideo"},
410 {".bmp", 4, "image/bmp"},
411 {".ttf", 4, "application/x-font-ttf"},
415 #ifndef MONGOOSE_NO_THREADS
416 void *mg_start_thread(void *(*f)(void *), void *p) {
418 return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p);
420 pthread_t thread_id = (pthread_t) 0;
423 (void) pthread_attr_init(&attr);
424 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
426 #if MONGOOSE_USE_STACK_SIZE > 1
427 (void) pthread_attr_setstacksize(&attr, MONGOOSE_USE_STACK_SIZE);
430 pthread_create(&thread_id, &attr, f, p);
431 pthread_attr_destroy(&attr);
433 return (void *) thread_id;
436 #endif // MONGOOSE_NO_THREADS
439 // Encode 'path' which is assumed UTF-8 string, into UNICODE string.
440 // wbuf and wbuf_len is a target buffer and its length.
441 static void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) {
442 char buf[MAX_PATH_SIZE * 2], buf2[MAX_PATH_SIZE * 2], *p;
444 strncpy(buf, path, sizeof(buf));
445 buf[sizeof(buf) - 1] = '\0';
447 // Trim trailing slashes
448 p = buf + strlen(buf) - 1;
449 while (p > buf && p[0] == '\\' || p[0] == '/') *p-- = '\0';
450 //change_slashes_to_backslashes(buf);
452 // Convert to Unicode and back. If doubly-converted string does not
453 // match the original, something is fishy, reject.
454 memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
455 MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
456 WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
458 if (strcmp(buf, buf2) != 0) {
463 static int mg_stat(const char *path, file_stat_t *st) {
464 wchar_t wpath[MAX_PATH_SIZE];
465 to_wchar(path, wpath, ARRAY_SIZE(wpath));
466 DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st)));
467 return _wstati64(wpath, st);
470 static FILE *mg_fopen(const char *path, const char *mode) {
471 wchar_t wpath[MAX_PATH_SIZE], wmode[10];
472 to_wchar(path, wpath, ARRAY_SIZE(wpath));
473 to_wchar(mode, wmode, ARRAY_SIZE(wmode));
474 return _wfopen(wpath, wmode);
477 static int mg_open(const char *path, int flag) {
478 wchar_t wpath[MAX_PATH_SIZE];
479 to_wchar(path, wpath, ARRAY_SIZE(wpath));
480 return _wopen(wpath, flag);
484 static void set_close_on_exec(int fd) {
486 (void) SetHandleInformation((HANDLE) fd, HANDLE_FLAG_INHERIT, 0);
488 fcntl(fd, F_SETFD, FD_CLOEXEC);
492 static void set_non_blocking_mode(sock_t sock) {
494 unsigned long on = 1;
495 ioctlsocket(sock, FIONBIO, &on);
497 int flags = fcntl(sock, F_GETFL, 0);
498 fcntl(sock, F_SETFL, flags | O_NONBLOCK);
502 // A helper function for traversing a comma separated list of values.
503 // It returns a list pointer shifted to the next value, or NULL if the end
504 // of the list found.
505 // Value is stored in val vector. If value has form "x=y", then eq_val
506 // vector is initialized to point to the "y" part, and val vector length
507 // is adjusted to point only to "x".
508 static const char *next_option(const char *list, struct vec *val,
509 struct vec *eq_val) {
510 if (list == NULL || *list == '\0') {
515 if ((list = strchr(val->ptr, ',')) != NULL) {
516 // Comma found. Store length and shift the list ptr
517 val->len = list - val->ptr;
520 // This value is the last one
521 list = val->ptr + strlen(val->ptr);
522 val->len = list - val->ptr;
525 if (eq_val != NULL) {
526 // Value has form "x=y", adjust pointers and lengths
527 // so that val points to "x", and eq_val points to "y".
529 eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
530 if (eq_val->ptr != NULL) {
531 eq_val->ptr++; // Skip over '=' character
532 eq_val->len = val->ptr + val->len - eq_val->ptr;
533 val->len = (eq_val->ptr - val->ptr) - 1;
541 static int spool(struct iobuf *io, const void *buf, int len) {
542 static const double mult = 1.2;
546 assert(io->len >= 0);
547 assert(io->len <= io->size);
549 //DBG(("1. %d %d %d", len, io->len, io->size));
551 } else if ((new_len = io->len + len) < io->size) {
552 memcpy(io->buf + io->len, buf, len);
554 } else if ((p = (char *) realloc(io->buf, (int) (new_len * mult))) != NULL) {
556 memcpy(io->buf + io->len, buf, len);
558 io->size = (int) (new_len * mult);
562 //DBG(("%d %d %d", len, io->len, io->size));
567 // Like snprintf(), but never returns negative value, or a value
568 // that is larger than a supplied buffer.
569 static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) {
571 if (buflen < 1) return 0;
572 n = vsnprintf(buf, buflen, fmt, ap);
575 } else if (n >= (int) buflen) {
576 n = (int) buflen - 1;
582 static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) {
586 n = mg_vsnprintf(buf, buflen, fmt, ap);
591 // Check whether full request is buffered. Return:
592 // -1 if request is malformed
593 // 0 if request is not yet fully buffered
594 // >0 actual request length, including last \r\n\r\n
595 static int get_request_len(const char *s, int buf_len) {
596 const unsigned char *buf = (unsigned char *) s;
599 for (i = 0; i < buf_len; i++) {
600 // Control characters are not allowed but >=128 are.
601 // Abort scan as soon as one malformed character is found.
602 if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) {
604 } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') {
606 } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' &&
607 buf[i + 2] == '\n') {
615 // Skip the characters until one of the delimiters characters found.
616 // 0-terminate resulting word. Skip the rest of the delimiters if any.
617 // Advance pointer to buffer to the next word. Return found 0-terminated word.
618 static char *skip(char **buf, const char *delimiters) {
619 char *p, *begin_word, *end_word, *end_delimiters;
622 end_word = begin_word + strcspn(begin_word, delimiters);
623 end_delimiters = end_word + strspn(end_word, delimiters);
625 for (p = end_word; p < end_delimiters; p++) {
629 *buf = end_delimiters;
634 // Parse HTTP headers from the given buffer, advance buffer to the point
635 // where parsing stopped.
636 static void parse_http_headers(char **buf, struct mg_connection *ri) {
639 for (i = 0; i < ARRAY_SIZE(ri->http_headers); i++) {
640 ri->http_headers[i].name = skip(buf, ": ");
641 ri->http_headers[i].value = skip(buf, "\r\n");
642 if (ri->http_headers[i].name[0] == '\0')
644 ri->num_headers = i + 1;
648 static const char *status_code_to_str(int status_code) {
649 switch (status_code) {
650 case 200: return "OK";
651 case 201: return "Created";
652 case 204: return "No Content";
653 case 301: return "Moved Permanently";
654 case 302: return "Found";
655 case 304: return "Not Modified";
656 case 400: return "Bad Request";
657 case 403: return "Forbidden";
658 case 404: return "Not Found";
659 case 405: return "Method Not Allowed";
660 case 409: return "Conflict";
661 case 411: return "Length Required";
662 case 413: return "Request Entity Too Large";
663 case 415: return "Unsupported Media Type";
664 case 423: return "Locked";
665 case 500: return "Server Error";
666 case 501: return "Not Implemented";
667 default: return "Server Error";
671 static void send_http_error(struct connection *conn, int code,
672 const char *fmt, ...) {
673 const char *message = status_code_to_str(code);
674 const char *rewrites = conn->server->config_options[URL_REWRITES];
675 char headers[200], body[200];
678 int body_len, headers_len, match_code;
680 conn->mg_conn.status_code = code;
682 // Invoke error handler if it is set
683 if (conn->server->error_handler != NULL &&
684 conn->server->error_handler(&conn->mg_conn) == MG_ERROR_PROCESSED) {
685 close_local_endpoint(conn);
689 // Handle error code rewrites
690 while ((rewrites = next_option(rewrites, &a, &b)) != NULL) {
691 if ((match_code = atoi(a.ptr)) > 0 && match_code == code) {
692 conn->mg_conn.status_code = 302;
693 mg_printf(&conn->mg_conn, "HTTP/1.1 %d Moved\r\n"
694 "Location: %.*s?code=%d&orig_uri=%s\r\n\r\n",
695 conn->mg_conn.status_code, b.len, b.ptr, code,
697 close_local_endpoint(conn);
702 body_len = mg_snprintf(body, sizeof(body), "%d %s\n", code, message);
705 body_len += mg_vsnprintf(body + body_len, sizeof(body) - body_len, fmt, ap);
708 if (code >= 300 && code <= 399) {
709 // 3xx errors do not have body
712 headers_len = mg_snprintf(headers, sizeof(headers),
713 "HTTP/1.1 %d %s\r\nContent-Length: %d\r\n"
714 "Content-Type: text/plain\r\n\r\n",
715 code, message, body_len);
716 spool(&conn->remote_iobuf, headers, headers_len);
717 spool(&conn->remote_iobuf, body, body_len);
718 close_local_endpoint(conn); // This will write to the log file
721 // Print message to buffer. If buffer is large enough to hold the message,
722 // return buffer. If buffer is to small, allocate large enough buffer on heap,
723 // and return allocated buffer.
724 static int alloc_vprintf(char **buf, size_t size, const char *fmt, va_list ap) {
728 // Windows is not standard-compliant, and vsnprintf() returns -1 if
729 // buffer is too small. Also, older versions of msvcrt.dll do not have
730 // _vscprintf(). However, if size is 0, vsnprintf() behaves correctly.
731 // Therefore, we make two passes: on first pass, get required message length.
732 // On second pass, actually print the message.
733 va_copy(ap_copy, ap);
734 len = vsnprintf(NULL, 0, fmt, ap_copy);
736 if (len > (int) size &&
737 (size = len + 1) > 0 &&
738 (*buf = (char *) malloc(size)) == NULL) {
739 len = -1; // Allocation failed, mark failure
741 va_copy(ap_copy, ap);
742 vsnprintf(*buf, size, fmt, ap_copy);
748 static void write_chunk(struct connection *conn, const char *buf, int len) {
750 int n = mg_snprintf(chunk_size, sizeof(chunk_size), "%X\r\n", len);
751 spool(&conn->remote_iobuf, chunk_size, n);
752 spool(&conn->remote_iobuf, buf, len);
753 spool(&conn->remote_iobuf, "\r\n", 2);
756 int mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap,
758 char mem[IOBUF_SIZE], *buf = mem;
761 if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
763 write_chunk((struct connection *) conn, buf, len);
765 len = mg_write(conn, buf, (size_t) len);
768 if (buf != mem && buf != NULL) {
775 int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
779 len = mg_vprintf(conn, fmt, ap, 0);
784 static int mg_socketpair(sock_t sp[2]) {
785 struct sockaddr_in sa;
786 sock_t sock, ret = -1;
787 socklen_t len = sizeof(sa);
789 sp[0] = sp[1] = INVALID_SOCKET;
791 (void) memset(&sa, 0, sizeof(sa));
792 sa.sin_family = AF_INET;
793 sa.sin_port = htons(0);
794 sa.sin_addr.s_addr = htonl(0x7f000001);
796 if ((sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET &&
797 !bind(sock, (struct sockaddr *) &sa, len) &&
799 !getsockname(sock, (struct sockaddr *) &sa, &len) &&
800 (sp[0] = socket(AF_INET, SOCK_STREAM, 6)) != -1 &&
801 !connect(sp[0], (struct sockaddr *) &sa, len) &&
802 (sp[1] = accept(sock,(struct sockaddr *) &sa, &len)) != INVALID_SOCKET) {
803 set_close_on_exec(sp[0]);
804 set_close_on_exec(sp[1]);
807 if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
808 if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
809 sp[0] = sp[1] = INVALID_SOCKET;
816 static int is_error(int n) {
818 (n < 0 && errno != EINTR && errno != EINPROGRESS &&
819 errno != EAGAIN && errno != EWOULDBLOCK
821 && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK
826 static void discard_leading_iobuf_bytes(struct iobuf *io, int n) {
827 if (n >= 0 && n <= io->len) {
828 memmove(io->buf, io->buf + n, io->len - n);
833 #ifndef MONGOOSE_NO_CGI
840 static int wait_until_ready(sock_t sock, int for_read) {
844 select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0);
848 static void *push_to_stdin(void *arg) {
849 struct threadparam *tp = arg;
850 int n, sent, stop = 0;
852 char buf[IOBUF_SIZE];
854 while (!stop && wait_until_ready(tp->s, 1) &&
855 (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) {
856 if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue;
857 for (sent = 0; !stop && sent < n; sent += k) {
858 if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1;
861 DBG(("%s", "FORWARED EVERYTHING TO CGI"));
862 CloseHandle(tp->hPipe);
868 static void *pull_from_stdout(void *arg) {
869 struct threadparam *tp = arg;
872 char buf[IOBUF_SIZE];
874 while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) {
875 for (sent = 0; !stop && sent < n; sent += k) {
876 if (wait_until_ready(tp->s, 0) &&
877 (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1;
880 DBG(("%s", "EOF FROM CGI"));
881 CloseHandle(tp->hPipe);
882 shutdown(tp->s, 2); // Without this, IO thread may get truncated data
889 static void spawn_stdio_thread(sock_t sock, HANDLE hPipe,
890 void *(*func)(void *)) {
891 struct threadparam *tp = malloc(sizeof(*tp));
895 mg_start_thread(func, tp);
899 static void abs_path(const char *utf8_path, char *abs_path, size_t len) {
900 wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE];
901 to_wchar(utf8_path, buf, ARRAY_SIZE(buf));
902 GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL);
903 WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0);
906 static pid_t start_process(char *interp, const char *cmd, const char *env,
907 const char *envp[], const char *dir, sock_t sock) {
908 STARTUPINFOW si = {0};
909 PROCESS_INFORMATION pi = {0};
910 HANDLE a[2], b[2], me = GetCurrentProcess();
911 wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE];
912 char buf[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE],
913 cmdline[MAX_PATH_SIZE], *p;
914 DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS;
918 si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
919 si.wShowWindow = SW_HIDE;
920 si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
922 CreatePipe(&a[0], &a[1], NULL, 0);
923 CreatePipe(&b[0], &b[1], NULL, 0);
924 DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags);
925 DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags);
927 if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) {
928 buf[0] = buf[1] = '\0';
929 fgets(buf, sizeof(buf), fp);
930 buf[sizeof(buf) - 1] = '\0';
931 if (buf[0] == '#' && buf[1] == '!') {
933 for (p = interp + strlen(interp);
934 isspace(* (uint8_t *) p) && p > interp; p--) *p = '\0';
939 if (interp != NULL) {
940 abs_path(interp, buf4, ARRAY_SIZE(buf4));
943 abs_path(dir, buf5, ARRAY_SIZE(buf5));
944 to_wchar(dir, full_dir, ARRAY_SIZE(full_dir));
945 mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\"",
946 interp ? interp : "", interp ? " " : "", cmd);
947 to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd));
949 if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP,
950 (void *) env, full_dir, &si, &pi) != 0) {
951 spawn_stdio_thread(sock, a[1], push_to_stdin);
952 spawn_stdio_thread(sock, b[0], pull_from_stdout);
958 DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess));
960 CloseHandle(si.hStdOutput);
961 CloseHandle(si.hStdInput);
964 CloseHandle(pi.hThread);
965 CloseHandle(pi.hProcess);
970 static pid_t start_process(const char *interp, const char *cmd, const char *env,
971 const char *envp[], const char *dir, sock_t sock) {
978 (void) dup2(sock, 0);
979 (void) dup2(sock, 1);
982 // After exec, all signal handlers are restored to their default values,
983 // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's
984 // implementation, SIGCHLD's handler will leave unchanged after exec
985 // if it was set to be ignored. Restore it to default action.
986 signal(SIGCHLD, SIG_DFL);
988 if (interp == NULL) {
989 execle(cmd, cmd, NULL, envp);
991 execle(interp, interp, cmd, NULL, envp);
993 snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n"
994 "500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp,
995 interp == NULL ? "" : " ", cmd, strerror(errno));
996 send(1, buf, strlen(buf), 0);
997 exit(EXIT_FAILURE); // exec call failed
1004 // This structure helps to create an environment for the spawned CGI program.
1005 // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
1006 // last element must be NULL.
1007 // However, on Windows there is a requirement that all these VARIABLE=VALUE\0
1008 // strings must reside in a contiguous buffer. The end of the buffer is
1009 // marked by two '\0' characters.
1010 // We satisfy both worlds: we create an envp array (which is vars), all
1011 // entries are actually pointers inside buf.
1012 struct cgi_env_block {
1013 struct mg_connection *conn;
1014 char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
1015 const char *vars[MAX_CGI_ENVIR_VARS]; // char *envp[]
1016 int len; // Space taken
1017 int nvars; // Number of variables in envp[]
1020 // Append VARIABLE=VALUE\0 string to the buffer, and add a respective
1021 // pointer into the vars array.
1022 static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
1027 // Calculate how much space is left in the buffer
1028 space = sizeof(block->buf) - block->len - 2;
1031 // Make a pointer to the free space int the buffer
1032 added = block->buf + block->len;
1034 // Copy VARIABLE=VALUE\0 string into the free space
1036 n = mg_vsnprintf(added, (size_t) space, fmt, ap);
1039 // Make sure we do not overflow buffer and the envp array
1040 if (n > 0 && n + 1 < space &&
1041 block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
1042 // Append a pointer to the added string into the envp array
1043 block->vars[block->nvars++] = added;
1044 // Bump up used length counter. Include \0 terminator
1045 block->len += n + 1;
1051 static void addenv2(struct cgi_env_block *blk, const char *name) {
1053 if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s);
1056 static void prepare_cgi_environment(struct connection *conn,
1058 struct cgi_env_block *blk) {
1059 struct mg_connection *ri = &conn->mg_conn;
1060 const char *s, *slash;
1061 char *p, **opts = conn->server->config_options;
1064 blk->len = blk->nvars = 0;
1067 addenv(blk, "SERVER_NAME=%s", opts[AUTH_DOMAIN]);
1068 addenv(blk, "SERVER_ROOT=%s", opts[DOCUMENT_ROOT]);
1069 addenv(blk, "DOCUMENT_ROOT=%s", opts[DOCUMENT_ROOT]);
1070 addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MONGOOSE_VERSION);
1072 // Prepare the environment block
1073 addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
1074 addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
1075 addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
1077 // TODO(lsm): fix this for IPv6 case
1078 //addenv(blk, "SERVER_PORT=%d", ri->remote_port);
1080 addenv(blk, "REQUEST_METHOD=%s", ri->request_method);
1081 addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip);
1082 addenv(blk, "REMOTE_PORT=%d", ri->remote_port);
1083 addenv(blk, "REQUEST_URI=%s%s%s", ri->uri,
1084 ri->query_string == NULL ? "" : "?",
1085 ri->query_string == NULL ? "" : ri->query_string);
1088 if (conn->path_info != NULL) {
1089 addenv(blk, "SCRIPT_NAME=%.*s",
1090 (int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri);
1091 addenv(blk, "PATH_INFO=%s", conn->path_info);
1093 s = strrchr(prog, '/');
1094 slash = strrchr(ri->uri, '/');
1095 addenv(blk, "SCRIPT_NAME=%.*s%s",
1096 slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri,
1097 s == NULL ? prog : s);
1100 addenv(blk, "SCRIPT_FILENAME=%s", prog);
1101 addenv(blk, "PATH_TRANSLATED=%s", prog);
1102 #ifdef MONGOOSE_USE_SSL
1103 addenv(blk, "HTTPS=%s", conn->ssl != NULL ? "on" : "off");
1105 addenv(blk, "HTTPS=%s", "off");
1108 if ((s = mg_get_header(ri, "Content-Type")) != NULL)
1109 addenv(blk, "CONTENT_TYPE=%s", s);
1111 if (ri->query_string != NULL)
1112 addenv(blk, "QUERY_STRING=%s", ri->query_string);
1114 if ((s = mg_get_header(ri, "Content-Length")) != NULL)
1115 addenv(blk, "CONTENT_LENGTH=%s", s);
1117 addenv2(blk, "PATH");
1118 addenv2(blk, "PERLLIB");
1119 addenv2(blk, ENV_EXPORT_TO_CGI);
1122 addenv2(blk, "COMSPEC");
1123 addenv2(blk, "SYSTEMROOT");
1124 addenv2(blk, "SystemDrive");
1125 addenv2(blk, "ProgramFiles");
1126 addenv2(blk, "ProgramFiles(x86)");
1127 addenv2(blk, "CommonProgramFiles(x86)");
1129 addenv2(blk, "LD_LIBRARY_PATH");
1132 // Add all headers as HTTP_* variables
1133 for (i = 0; i < ri->num_headers; i++) {
1134 p = addenv(blk, "HTTP_%s=%s",
1135 ri->http_headers[i].name, ri->http_headers[i].value);
1137 // Convert variable name into uppercase, and change - to _
1138 for (; *p != '=' && *p != '\0'; p++) {
1141 *p = (char) toupper(* (unsigned char *) p);
1145 blk->vars[blk->nvars++] = NULL;
1146 blk->buf[blk->len++] = '\0';
1148 assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
1149 assert(blk->len > 0);
1150 assert(blk->len < (int) sizeof(blk->buf));
1153 static const char cgi_status[] = "HTTP/1.1 200 OK\r\n";
1155 static void open_cgi_endpoint(struct connection *conn, const char *prog) {
1156 struct cgi_env_block blk;
1157 char dir[MAX_PATH_SIZE], *p;
1160 prepare_cgi_environment(conn, prog, &blk);
1161 // CGI must be executed in its own directory. 'dir' must point to the
1162 // directory containing executable program, 'p' must point to the
1163 // executable program name relative to 'dir'.
1164 if ((p = strrchr(prog, '/')) == NULL) {
1165 mg_snprintf(dir, sizeof(dir), "%s", ".");
1167 mg_snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog);
1170 // Try to create socketpair in a loop until success. mg_socketpair()
1171 // can be interrupted by a signal and fail.
1172 // TODO(lsm): use sigaction to restart interrupted syscall
1175 } while (fds[0] == INVALID_SOCKET);
1177 if (start_process(conn->server->config_options[CGI_INTERPRETER],
1178 prog, blk.buf, blk.vars, dir, fds[1]) > 0) {
1179 conn->endpoint_type = EP_CGI;
1180 conn->endpoint.cgi_sock = fds[0];
1181 spool(&conn->remote_iobuf, cgi_status, sizeof(cgi_status) - 1);
1182 conn->mg_conn.status_code = 200;
1183 conn->flags |= CONN_BUFFER;
1185 closesocket(fds[0]);
1186 send_http_error(conn, 500, "start_process(%s) failed", prog);
1190 closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket
1194 static void read_from_cgi(struct connection *conn) {
1195 struct iobuf *io = &conn->remote_iobuf;
1196 char buf[IOBUF_SIZE], buf2[sizeof(buf)], *s = buf2;
1197 const char *status = "500";
1198 struct mg_connection c;
1199 int len, s_len = sizeof(cgi_status) - 1,
1200 n = recv(conn->endpoint.cgi_sock, buf, sizeof(buf), 0);
1202 DBG(("%p %d", conn, n));
1204 close_local_endpoint(conn);
1206 spool(&conn->remote_iobuf, buf, n);
1207 if (conn->flags & CONN_BUFFER) {
1208 len = get_request_len(io->buf + s_len, io->len - s_len);
1209 if (len == 0) return;
1211 memset(&c, 0, sizeof(c));
1212 memcpy(buf2, io->buf + s_len, len);
1213 buf2[len - 1] = '\0';
1214 parse_http_headers(&s, &c);
1215 if (mg_get_header(&c, "Location") != NULL) {
1217 } else if ((status = (char *) mg_get_header(&c, "Status")) == NULL) {
1221 memcpy(io->buf + 9, status, 3);
1222 conn->mg_conn.status_code = atoi(status);
1223 conn->flags &= ~CONN_BUFFER;
1228 static void forward_post_data(struct connection *conn) {
1229 struct iobuf *io = &conn->local_iobuf;
1230 int n = send(conn->endpoint.cgi_sock, io->buf, io->len, 0);
1231 discard_leading_iobuf_bytes(io, n);
1233 #endif // !MONGOOSE_NO_CGI
1235 // 'sa' must be an initialized address to bind to
1236 static sock_t open_listening_socket(union socket_address *sa) {
1237 socklen_t len = sizeof(*sa);
1238 sock_t on = 1, sock = INVALID_SOCKET;
1240 if ((sock = socket(sa->sa.sa_family, SOCK_STREAM, 6)) != INVALID_SOCKET &&
1241 !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
1242 !bind(sock, &sa->sa, sa->sa.sa_family == AF_INET ?
1243 sizeof(sa->sin) : sizeof(sa->sa)) &&
1244 !listen(sock, SOMAXCONN)) {
1245 set_non_blocking_mode(sock);
1246 // In case port was set to 0, get the real port number
1247 (void) getsockname(sock, &sa->sa, &len);
1248 } else if (sock != INVALID_SOCKET) {
1250 sock = INVALID_SOCKET;
1256 static char *mg_strdup(const char *str) {
1257 char *copy = (char *) malloc(strlen(str) + 1);
1264 static int isbyte(int n) {
1265 return n >= 0 && n <= 255;
1268 static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
1269 int n, a, b, c, d, slash = 32, len = 0;
1271 if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
1272 sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
1273 isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) &&
1274 slash >= 0 && slash < 33) {
1276 *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d;
1277 *mask = slash ? 0xffffffffU << (32 - slash) : 0;
1283 // Verify given socket address against the ACL.
1284 // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
1285 static int check_acl(const char *acl, uint32_t remote_ip) {
1290 // If any ACL is set, deny by default
1291 allowed = acl == NULL ? '+' : '-';
1293 while ((acl = next_option(acl, &vec, NULL)) != NULL) {
1295 if ((flag != '+' && flag != '-') ||
1296 parse_net(&vec.ptr[1], &net, &mask) == 0) {
1300 if (net == (remote_ip & mask)) {
1305 return allowed == '+';
1308 static void sockaddr_to_string(char *buf, size_t len,
1309 const union socket_address *usa) {
1311 #if defined(MONGOOSE_USE_IPV6)
1312 inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
1313 (void *) &usa->sin.sin_addr :
1314 (void *) &usa->sin6.sin6_addr, buf, len);
1315 #elif defined(_WIN32)
1316 // Only Windoze Vista (and newer) have inet_ntop()
1317 strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
1319 inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
1323 static struct connection *accept_new_connection(struct mg_server *server) {
1324 union socket_address sa;
1325 socklen_t len = sizeof(sa);
1326 sock_t sock = INVALID_SOCKET;
1327 struct connection *conn = NULL;
1329 // NOTE(lsm): on Windows, sock is always > FD_SETSIZE
1330 if ((sock = accept(server->listening_sock, &sa.sa, &len)) == INVALID_SOCKET) {
1331 } else if (!check_acl(server->config_options[ACCESS_CONTROL_LIST],
1332 ntohl(* (uint32_t *) &sa.sin.sin_addr))) {
1333 // NOTE(lsm): check_acl doesn't work for IPv6
1335 } else if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) {
1337 #ifdef MONGOOSE_USE_SSL
1338 } else if (server->ssl_ctx != NULL &&
1339 ((conn->ssl = SSL_new(server->ssl_ctx)) == NULL ||
1340 SSL_set_fd(conn->ssl, sock) != 1)) {
1347 set_close_on_exec(sock);
1348 set_non_blocking_mode(sock);
1349 conn->server = server;
1350 conn->client_sock = sock;
1351 sockaddr_to_string(conn->mg_conn.remote_ip,
1352 sizeof(conn->mg_conn.remote_ip), &sa);
1353 conn->mg_conn.remote_port = ntohs(sa.sin.sin_port);
1354 conn->mg_conn.server_param = server->server_data;
1355 conn->mg_conn.local_ip = server->local_ip;
1356 conn->mg_conn.local_port = ntohs(server->lsa.sin.sin_port);
1357 LINKED_LIST_ADD_TO_FRONT(&server->active_connections, &conn->link);
1358 DBG(("added conn %p", conn));
1364 static void close_conn(struct connection *conn) {
1365 LINKED_LIST_REMOVE(&conn->link);
1366 closesocket(conn->client_sock);
1367 close_local_endpoint(conn);
1368 DBG(("%p %d %d", conn, conn->flags, conn->endpoint_type));
1369 free(conn->request); // It's OK to free(NULL), ditto below
1370 free(conn->path_info);
1371 free(conn->remote_iobuf.buf);
1372 free(conn->local_iobuf.buf);
1373 #ifdef MONGOOSE_USE_SSL
1374 if (conn->ssl != NULL) SSL_free(conn->ssl);
1379 // Protect against directory disclosure attack by removing '..',
1380 // excessive '/' and '\' characters
1381 static void remove_double_dots_and_double_slashes(char *s) {
1384 while (*s != '\0') {
1386 if (s[-1] == '/' || s[-1] == '\\') {
1387 // Skip all following slashes, backslashes and double-dots
1388 while (s[0] != '\0') {
1389 if (s[0] == '/' || s[0] == '\\') { s++; }
1390 else if (s[0] == '.' && s[1] == '.') { s += 2; }
1398 int mg_url_decode(const char *src, int src_len, char *dst,
1399 int dst_len, int is_form_url_encoded) {
1401 #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
1403 for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
1404 if (src[i] == '%' && i < src_len - 2 &&
1405 isxdigit(* (const unsigned char *) (src + i + 1)) &&
1406 isxdigit(* (const unsigned char *) (src + i + 2))) {
1407 a = tolower(* (const unsigned char *) (src + i + 1));
1408 b = tolower(* (const unsigned char *) (src + i + 2));
1409 dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
1411 } else if (is_form_url_encoded && src[i] == '+') {
1418 dst[j] = '\0'; // Null-terminate the destination
1420 return i >= src_len ? j : -1;
1423 static int is_valid_http_method(const char *method) {
1424 return !strcmp(method, "GET") || !strcmp(method, "POST") ||
1425 !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
1426 !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
1427 !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND")
1428 || !strcmp(method, "MKCOL");
1431 // Parse HTTP request, fill in mg_request structure.
1432 // This function modifies the buffer by NUL-terminating
1433 // HTTP request components, header names and header values.
1434 // Note that len must point to the last \n of HTTP headers.
1435 static int parse_http_message(char *buf, int len, struct mg_connection *ri) {
1438 // Reset the connection. Make sure that we don't touch fields that are
1439 // set elsewhere: remote_ip, remote_port, server_param
1440 ri->request_method = ri->uri = ri->http_version = ri->query_string = NULL;
1441 ri->num_headers = ri->status_code = ri->is_websocket = ri->content_len = 0;
1443 buf[len - 1] = '\0';
1445 // RFC says that all initial whitespaces should be ingored
1446 while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
1449 ri->request_method = skip(&buf, " ");
1450 ri->uri = skip(&buf, " ");
1451 ri->http_version = skip(&buf, "\r\n");
1453 // HTTP message could be either HTTP request or HTTP response, e.g.
1454 // "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..."
1455 is_request = is_valid_http_method(ri->request_method);
1456 if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) ||
1457 (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) {
1461 ri->http_version += 5;
1463 parse_http_headers(&buf, ri);
1465 if ((ri->query_string = strchr(ri->uri, '?')) != NULL) {
1466 *(char *) ri->query_string++ = '\0';
1468 n = (int) strlen(ri->uri);
1469 mg_url_decode(ri->uri, n, (char *) ri->uri, n + 1, 0);
1470 remove_double_dots_and_double_slashes((char *) ri->uri);
1476 static int lowercase(const char *s) {
1477 return tolower(* (const unsigned char *) s);
1480 static int mg_strcasecmp(const char *s1, const char *s2) {
1484 diff = lowercase(s1++) - lowercase(s2++);
1485 } while (diff == 0 && s1[-1] != '\0');
1490 static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
1495 diff = lowercase(s1++) - lowercase(s2++);
1496 } while (diff == 0 && s1[-1] != '\0' && --len > 0);
1501 // Return HTTP header value, or NULL if not found.
1502 const char *mg_get_header(const struct mg_connection *ri, const char *s) {
1505 for (i = 0; i < ri->num_headers; i++)
1506 if (!mg_strcasecmp(s, ri->http_headers[i].name))
1507 return ri->http_headers[i].value;
1512 #ifndef MONGOOSE_NO_FILESYSTEM
1513 // Perform case-insensitive match of string against pattern
1514 static int match_prefix(const char *pattern, int pattern_len, const char *str) {
1516 int len, res, i = 0, j = 0;
1518 if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
1519 res = match_prefix(pattern, or_str - pattern, str);
1520 return res > 0 ? res :
1521 match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
1524 for (; i < pattern_len; i++, j++) {
1525 if (pattern[i] == '?' && str[j] != '\0') {
1527 } else if (pattern[i] == '$') {
1528 return str[j] == '\0' ? j : -1;
1529 } else if (pattern[i] == '*') {
1531 if (pattern[i] == '*') {
1533 len = (int) strlen(str + j);
1535 len = (int) strcspn(str + j, "/");
1537 if (i == pattern_len) {
1541 res = match_prefix(pattern + i, pattern_len - i, str + j + len);
1542 } while (res == -1 && len-- > 0);
1543 return res == -1 ? -1 : j + res + len;
1544 } else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
1551 static int must_hide_file(struct connection *conn, const char *path) {
1552 const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
1553 const char *pattern = conn->server->config_options[HIDE_FILES_PATTERN];
1554 return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 ||
1555 (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0);
1558 // Return 1 if real file has been found, 0 otherwise
1559 static int convert_uri_to_file_name(struct connection *conn, char *buf,
1560 size_t buf_len, file_stat_t *st) {
1562 const char *rewrites = conn->server->config_options[URL_REWRITES];
1563 const char *root = conn->server->config_options[DOCUMENT_ROOT];
1564 #ifndef MONGOOSE_NO_CGI
1565 const char *cgi_pat = conn->server->config_options[CGI_PATTERN];
1568 const char *uri = conn->mg_conn.uri;
1571 // No filesystem access
1572 if (root == NULL) return 0;
1574 // Handle URL rewrites
1575 mg_snprintf(buf, buf_len, "%s%s", root, uri);
1576 while ((rewrites = next_option(rewrites, &a, &b)) != NULL) {
1577 if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
1578 mg_snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.ptr, uri + match_len);
1583 if (stat(buf, st) == 0) return 1;
1585 #ifndef MONGOOSE_NO_CGI
1586 // Support PATH_INFO for CGI scripts.
1587 for (p = buf + strlen(root) + 2; *p != '\0'; p++) {
1590 if (match_prefix(cgi_pat, strlen(cgi_pat), buf) > 0 && !stat(buf, st)) {
1591 DBG(("!!!! [%s]", buf));
1593 conn->path_info = mg_strdup(p);
1604 #endif // MONGOOSE_NO_FILESYSTEM
1606 static int should_keep_alive(const struct mg_connection *conn) {
1607 const char *method = conn->request_method;
1608 const char *http_version = conn->http_version;
1609 const char *header = mg_get_header(conn, "Connection");
1610 return method != NULL && (!strcmp(method, "GET") ||
1611 ((struct connection *) conn)->endpoint_type == EP_USER) &&
1612 ((header != NULL && !mg_strcasecmp(header, "keep-alive")) ||
1613 (header == NULL && http_version && !strcmp(http_version, "1.1")));
1616 int mg_write(struct mg_connection *c, const void *buf, int len) {
1617 return spool(&((struct connection *) c)->remote_iobuf, buf, len);
1620 void mg_send_status(struct mg_connection *c, int status) {
1621 if (c->status_code == 0) {
1622 c->status_code = status;
1623 mg_printf(c, "HTTP/1.1 %d %s\r\n", status, status_code_to_str(status));
1627 void mg_send_header(struct mg_connection *c, const char *name, const char *v) {
1628 if (c->status_code == 0) {
1629 c->status_code = 200;
1630 mg_printf(c, "HTTP/1.1 %d %s\r\n", 200, status_code_to_str(200));
1632 mg_printf(c, "%s: %s\r\n", name, v);
1635 static void terminate_headers(struct mg_connection *c) {
1636 struct connection *conn = (struct connection *) c;
1637 if (!(conn->flags & CONN_HEADERS_SENT)) {
1638 mg_send_header(c, "Transfer-Encoding", "chunked");
1639 mg_write(c, "\r\n", 2);
1640 conn->flags |= CONN_HEADERS_SENT;
1644 void mg_send_data(struct mg_connection *c, const void *data, int data_len) {
1645 terminate_headers(c);
1646 write_chunk((struct connection *) c, (const char *) data, data_len);
1649 void mg_printf_data(struct mg_connection *c, const char *fmt, ...) {
1652 terminate_headers(c);
1655 mg_vprintf(c, fmt, ap, 1);
1659 #if !defined(NO_WEBSOCKET) || !defined(MONGOOSE_NO_AUTH)
1660 static int is_big_endian(void) {
1661 static const int n = 1;
1662 return ((char *) &n)[0] == 0;
1666 #ifndef MONGOOSE_NO_WEBSOCKET
1667 // START OF SHA-1 code
1668 // Copyright(c) By Steve Reid <steve@edmweb.com>
1669 #define SHA1HANDSOFF
1671 #include "solarisfixes.h"
1674 union char64long16 { unsigned char c[64]; uint32_t l[16]; };
1676 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
1678 static uint32_t blk0(union char64long16 *block, int i) {
1679 // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN
1680 if (!is_big_endian()) {
1681 block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) |
1682 (rol(block->l[i], 8) & 0x00FF00FF);
1687 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
1688 ^block->l[(i+2)&15]^block->l[i&15],1))
1689 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30);
1690 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
1691 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
1692 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
1693 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
1698 unsigned char buffer[64];
1701 static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) {
1702 uint32_t a, b, c, d, e;
1703 union char64long16 block[1];
1705 memcpy(block, buffer, 64);
1711 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);
1712 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);
1713 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);
1714 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);
1715 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);
1716 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);
1717 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);
1718 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);
1719 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);
1720 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);
1721 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);
1722 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);
1723 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);
1724 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);
1725 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);
1726 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);
1727 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);
1728 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);
1729 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);
1730 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);
1736 // Erase working structures. The order of operations is important,
1737 // used to ensure that compiler doesn't optimize those out.
1738 memset(block, 0, sizeof(block));
1739 a = b = c = d = e = 0;
1740 (void) a; (void) b; (void) c; (void) d; (void) e;
1743 static void SHA1Init(SHA1_CTX* context) {
1744 context->state[0] = 0x67452301;
1745 context->state[1] = 0xEFCDAB89;
1746 context->state[2] = 0x98BADCFE;
1747 context->state[3] = 0x10325476;
1748 context->state[4] = 0xC3D2E1F0;
1749 context->count[0] = context->count[1] = 0;
1752 static void SHA1Update(SHA1_CTX* context, const unsigned char* data,
1756 j = context->count[0];
1757 if ((context->count[0] += len << 3) < j)
1758 context->count[1]++;
1759 context->count[1] += (len>>29);
1761 if ((j + len) > 63) {
1762 memcpy(&context->buffer[j], data, (i = 64-j));
1763 SHA1Transform(context->state, context->buffer);
1764 for ( ; i + 63 < len; i += 64) {
1765 SHA1Transform(context->state, &data[i]);
1770 memcpy(&context->buffer[j], &data[i], len - i);
1773 static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) {
1775 unsigned char finalcount[8], c;
1777 for (i = 0; i < 8; i++) {
1778 finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
1779 >> ((3-(i & 3)) * 8) ) & 255);
1782 SHA1Update(context, &c, 1);
1783 while ((context->count[0] & 504) != 448) {
1785 SHA1Update(context, &c, 1);
1787 SHA1Update(context, finalcount, 8);
1788 for (i = 0; i < 20; i++) {
1789 digest[i] = (unsigned char)
1790 ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
1792 memset(context, '\0', sizeof(*context));
1793 memset(&finalcount, '\0', sizeof(finalcount));
1797 static void base64_encode(const unsigned char *src, int src_len, char *dst) {
1798 static const char *b64 =
1799 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
1802 for (i = j = 0; i < src_len; i += 3) {
1804 b = i + 1 >= src_len ? 0 : src[i + 1];
1805 c = i + 2 >= src_len ? 0 : src[i + 2];
1807 dst[j++] = b64[a >> 2];
1808 dst[j++] = b64[((a & 3) << 4) | (b >> 4)];
1809 if (i + 1 < src_len) {
1810 dst[j++] = b64[(b & 15) << 2 | (c >> 6)];
1812 if (i + 2 < src_len) {
1813 dst[j++] = b64[c & 63];
1816 while (j % 4 != 0) {
1822 static void send_websocket_handshake(struct mg_connection *conn,
1824 static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
1825 char buf[500], sha[20], b64_sha[sizeof(sha) * 2];
1828 mg_snprintf(buf, sizeof(buf), "%s%s", key, magic);
1830 SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));
1831 SHA1Final((unsigned char *) sha, &sha_ctx);
1832 base64_encode((unsigned char *) sha, sizeof(sha), b64_sha);
1833 mg_snprintf(buf, sizeof(buf), "%s%s%s",
1834 "HTTP/1.1 101 Switching Protocols\r\n"
1835 "Upgrade: websocket\r\n"
1836 "Connection: Upgrade\r\n"
1837 "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n");
1839 mg_write(conn, buf, strlen(buf));
1842 static int deliver_websocket_frame(struct connection *conn) {
1843 // Having buf unsigned char * is important, as it is used below in arithmetic
1844 unsigned char *buf = (unsigned char *) conn->local_iobuf.buf;
1845 int i, len, buf_len = conn->local_iobuf.len, frame_len = 0,
1846 mask_len = 0, header_len = 0, data_len = 0, buffered = 0;
1850 mask_len = buf[1] & 128 ? 4 : 0;
1851 if (len < 126 && buf_len >= mask_len) {
1853 header_len = 2 + mask_len;
1854 } else if (len == 126 && buf_len >= 4 + mask_len) {
1855 header_len = 4 + mask_len;
1856 data_len = ((((int) buf[2]) << 8) + buf[3]);
1857 } else if (buf_len >= 10 + mask_len) {
1858 header_len = 10 + mask_len;
1859 data_len = (int) (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) +
1860 htonl(* (uint32_t *) &buf[6]);
1864 frame_len = header_len + data_len;
1865 buffered = frame_len > 0 && frame_len <= buf_len;
1868 conn->mg_conn.content_len = data_len;
1869 conn->mg_conn.content = (char *) buf + header_len;
1870 conn->mg_conn.wsbits = buf[0];
1872 // Apply mask if necessary
1874 for (i = 0; i < data_len; i++) {
1875 buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4];
1879 // Call the handler and remove frame from the iobuf
1880 if (conn->server->request_handler(&conn->mg_conn) == MG_CLIENT_CLOSE) {
1881 conn->flags |= CONN_SPOOL_DONE;
1883 discard_leading_iobuf_bytes(&conn->local_iobuf, frame_len);
1889 int mg_websocket_write(struct mg_connection* conn, int opcode,
1890 const char *data, size_t data_len) {
1891 unsigned char *copy;
1892 size_t copy_len = 0;
1895 if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) {
1899 copy[0] = 0x80 + (opcode & 0x0f);
1901 // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2
1902 if (data_len < 126) {
1903 // Inline 7-bit length field
1905 memcpy(copy + 2, data, data_len);
1906 copy_len = 2 + data_len;
1907 } else if (data_len <= 0xFFFF) {
1908 // 16-bit length field
1910 * (uint16_t *) (copy + 2) = (uint16_t) htons((uint16_t) data_len);
1911 memcpy(copy + 4, data, data_len);
1912 copy_len = 4 + data_len;
1914 // 64-bit length field
1916 * (uint32_t *) (copy + 2) = (uint32_t)
1917 htonl((uint32_t) ((uint64_t) data_len >> 32));
1918 * (uint32_t *) (copy + 6) = (uint32_t) htonl(data_len & 0xffffffff);
1919 memcpy(copy + 10, data, data_len);
1920 copy_len = 10 + data_len;
1924 retval = mg_write(conn, copy, copy_len);
1931 static void send_websocket_handshake_if_requested(struct mg_connection *conn) {
1932 const char *ver = mg_get_header(conn, "Sec-WebSocket-Version"),
1933 *key = mg_get_header(conn, "Sec-WebSocket-Key");
1934 if (ver != NULL && key != NULL) {
1935 conn->is_websocket = 1;
1936 send_websocket_handshake(conn, key);
1940 static void ping_idle_websocket_connection(struct connection *conn, time_t t) {
1941 if (t - conn->last_activity_time > MONGOOSE_USE_WEBSOCKET_PING_INTERVAL) {
1942 mg_websocket_write(&conn->mg_conn, 0x9, "", 0);
1946 #define ping_idle_websocket_connection(conn, t)
1947 #endif // !MONGOOSE_NO_WEBSOCKET
1949 static void write_terminating_chunk(struct connection *conn) {
1950 mg_write(&conn->mg_conn, "0\r\n\r\n", 5);
1953 static int call_request_handler(struct connection *conn) {
1955 conn->mg_conn.content = conn->local_iobuf.buf;
1956 switch ((result = conn->server->request_handler(&conn->mg_conn))) {
1957 case MG_REQUEST_CALL_AGAIN: conn->flags |= CONN_LONG_RUNNING; break;
1958 case MG_REQUEST_NOT_PROCESSED: break;
1960 if (conn->flags & CONN_HEADERS_SENT) {
1961 write_terminating_chunk(conn);
1963 close_local_endpoint(conn);
1969 static void callback_http_client_on_connect(struct connection *conn) {
1971 socklen_t len = sizeof(ok);
1973 conn->flags &= ~CONN_CONNECTING;
1974 ret = getsockopt(conn->client_sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len);
1975 #ifdef MONGOOSE_USE_SSL
1976 if (ret == 0 && ok == 0 && conn->ssl != NULL) {
1977 int res = SSL_connect(conn->ssl), ssl_err = SSL_get_error(conn->ssl, res);
1978 //DBG(("%p res %d %d", conn, res, ssl_err));
1980 conn->flags = CONN_SSL_HANDS_SHAKEN;
1981 } else if (res == 0 || ssl_err == 2 || ssl_err == 3) {
1982 conn->flags |= CONN_CONNECTING;
1983 return; // Call us again
1989 conn->mg_conn.status_code =
1990 (ret == 0 && ok == 0) ? MG_CONNECT_SUCCESS : MG_CONNECT_FAILURE;
1991 if (conn->handler(&conn->mg_conn) || ok != 0) {
1992 conn->flags |= CONN_CLOSE;
1996 static void write_to_socket(struct connection *conn) {
1997 struct iobuf *io = &conn->remote_iobuf;
2000 if (conn->endpoint_type == EP_CLIENT && conn->flags & CONN_CONNECTING) {
2001 callback_http_client_on_connect(conn);
2005 #ifdef MONGOOSE_USE_SSL
2006 if (conn->ssl != NULL) {
2007 n = SSL_write(conn->ssl, io->buf, io->len);
2010 { n = send(conn->client_sock, io->buf, io->len, 0); }
2012 DBG(("%p Written %d of %d(%d): [%.*s ...]",
2013 conn, n, io->len, io->size, io->len < 40 ? io->len : 40, io->buf));
2016 conn->flags |= CONN_CLOSE;
2018 discard_leading_iobuf_bytes(io, n);
2019 conn->num_bytes_sent += n;
2022 if (io->len == 0 && conn->flags & CONN_SPOOL_DONE) {
2023 conn->flags |= CONN_CLOSE;
2027 const char *mg_get_mime_type(const char *path, const char *default_mime_type) {
2031 path_len = strlen(path);
2033 for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) {
2034 ext = path + (path_len - static_builtin_mime_types[i].ext_len);
2035 if (path_len > static_builtin_mime_types[i].ext_len &&
2036 mg_strcasecmp(ext, static_builtin_mime_types[i].extension) == 0) {
2037 return static_builtin_mime_types[i].mime_type;
2041 return default_mime_type;
2044 #ifndef MONGOOSE_NO_FILESYSTEM
2045 // Convert month to the month number. Return -1 on error, or month number
2046 static int get_month_index(const char *s) {
2047 static const char *month_names[] = {
2048 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
2049 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
2053 for (i = 0; i < (int) ARRAY_SIZE(month_names); i++)
2054 if (!strcmp(s, month_names[i]))
2060 static int num_leap_years(int year) {
2061 return year / 4 - year / 100 + year / 400;
2064 // Parse UTC date-time string, and return the corresponding time_t value.
2065 static time_t parse_date_string(const char *datetime) {
2066 static const unsigned short days_before_month[] = {
2067 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
2070 int second, minute, hour, day, month, year, leap_days, days;
2071 time_t result = (time_t) 0;
2073 if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
2074 &day, month_str, &year, &hour, &minute, &second) == 6) ||
2075 (sscanf(datetime, "%d %3s %d %d:%d:%d",
2076 &day, month_str, &year, &hour, &minute, &second) == 6) ||
2077 (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
2078 &day, month_str, &year, &hour, &minute, &second) == 6) ||
2079 (sscanf(datetime, "%d-%3s-%d %d:%d:%d",
2080 &day, month_str, &year, &hour, &minute, &second) == 6)) &&
2082 (month = get_month_index(month_str)) != -1) {
2083 leap_days = num_leap_years(year) - num_leap_years(1970);
2085 days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
2086 result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
2092 // Look at the "path" extension and figure what mime type it has.
2093 // Store mime type in the vector.
2094 static void get_mime_type(const struct mg_server *server, const char *path,
2096 struct vec ext_vec, mime_vec;
2097 const char *list, *ext;
2100 path_len = strlen(path);
2102 // Scan user-defined mime types first, in case user wants to
2103 // override default mime types.
2104 list = server->config_options[EXTRA_MIME_TYPES];
2105 while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
2106 // ext now points to the path suffix
2107 ext = path + path_len - ext_vec.len;
2108 if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
2114 vec->ptr = mg_get_mime_type(path, "text/plain");
2115 vec->len = strlen(vec->ptr);
2118 static const char *suggest_connection_header(const struct mg_connection *conn) {
2119 return should_keep_alive(conn) ? "keep-alive" : "close";
2122 static void construct_etag(char *buf, size_t buf_len, const file_stat_t *st) {
2123 mg_snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"",
2124 (unsigned long) st->st_mtime, (int64_t) st->st_size);
2127 // Return True if we should reply 304 Not Modified.
2128 static int is_not_modified(const struct connection *conn,
2129 const file_stat_t *stp) {
2131 const char *ims = mg_get_header(&conn->mg_conn, "If-Modified-Since");
2132 const char *inm = mg_get_header(&conn->mg_conn, "If-None-Match");
2133 construct_etag(etag, sizeof(etag), stp);
2134 return (inm != NULL && !mg_strcasecmp(etag, inm)) ||
2135 (ims != NULL && stp->st_mtime <= parse_date_string(ims));
2138 // For given directory path, substitute it to valid index file.
2139 // Return 0 if index file has been found, -1 if not found.
2140 // If the file is found, it's stats is returned in stp.
2141 static int find_index_file(struct connection *conn, char *path,
2142 size_t path_len, file_stat_t *stp) {
2143 const char *list = conn->server->config_options[INDEX_FILES];
2145 struct vec filename_vec;
2146 size_t n = strlen(path), found = 0;
2148 // The 'path' given to us points to the directory. Remove all trailing
2149 // directory separator characters from the end of the path, and
2150 // then append single directory separator character.
2151 while (n > 0 && path[n - 1] == '/') {
2156 // Traverse index files list. For each entry, append it to the given
2157 // path and see if the file exists. If it exists, break the loop
2158 while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
2160 // Ignore too long entries that may overflow path buffer
2161 if (filename_vec.len > (int) (path_len - (n + 2)))
2164 // Prepare full path to the index file
2165 strncpy(path + n + 1, filename_vec.ptr, filename_vec.len);
2166 path[n + 1 + filename_vec.len] = '\0';
2168 //DBG(("[%s]", path));
2171 if (!stat(path, &st)) {
2172 // Yes it does, break the loop
2179 // If no index file exists, restore directory path
2187 static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
2188 return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
2191 static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
2192 strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
2195 static void open_file_endpoint(struct connection *conn, const char *path,
2197 char date[64], lm[64], etag[64], range[64], headers[500];
2198 const char *msg = "OK", *hdr;
2199 time_t curtime = time(NULL);
2201 struct vec mime_vec;
2204 conn->endpoint_type = EP_FILE;
2205 set_close_on_exec(conn->endpoint.fd);
2206 conn->mg_conn.status_code = 200;
2208 get_mime_type(conn->server, path, &mime_vec);
2209 conn->cl = st->st_size;
2212 // If Range: header specified, act accordingly
2214 hdr = mg_get_header(&conn->mg_conn, "Range");
2215 if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 &&
2216 r1 >= 0 && r2 >= 0) {
2217 conn->mg_conn.status_code = 206;
2218 conn->cl = n == 2 ? (r2 > conn->cl ? conn->cl : r2) - r1 + 1: conn->cl - r1;
2219 mg_snprintf(range, sizeof(range), "Content-Range: bytes "
2220 "%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n",
2221 r1, r1 + conn->cl - 1, (int64_t) st->st_size);
2222 msg = "Partial Content";
2223 lseek(conn->endpoint.fd, r1, SEEK_SET);
2226 // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
2227 // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
2228 gmt_time_string(date, sizeof(date), &curtime);
2229 gmt_time_string(lm, sizeof(lm), &st->st_mtime);
2230 construct_etag(etag, sizeof(etag), st);
2232 n = mg_snprintf(headers, sizeof(headers),
2233 "HTTP/1.1 %d %s\r\n"
2235 "Last-Modified: %s\r\n"
2237 "Content-Type: %.*s\r\n"
2238 "Content-Length: %" INT64_FMT "\r\n"
2239 "Connection: %s\r\n"
2240 "Accept-Ranges: bytes\r\n"
2242 conn->mg_conn.status_code, msg, date, lm, etag,
2243 (int) mime_vec.len, mime_vec.ptr, conn->cl,
2244 suggest_connection_header(&conn->mg_conn),
2245 range, MONGOOSE_USE_EXTRA_HTTP_HEADERS);
2246 spool(&conn->remote_iobuf, headers, n);
2248 if (!strcmp(conn->mg_conn.request_method, "HEAD")) {
2249 conn->flags |= CONN_SPOOL_DONE;
2250 close(conn->endpoint.fd);
2251 conn->endpoint_type = EP_NONE;
2255 #endif // MONGOOSE_NO_FILESYSTEM
2257 static void call_request_handler_if_data_is_buffered(struct connection *conn) {
2258 struct iobuf *loc = &conn->local_iobuf;
2259 struct mg_connection *c = &conn->mg_conn;
2261 #ifndef MONGOOSE_NO_WEBSOCKET
2262 if (conn->mg_conn.is_websocket) {
2263 do { } while (deliver_websocket_frame(conn));
2266 if ((size_t) loc->len >= c->content_len &&
2267 call_request_handler(conn) == MG_REQUEST_NOT_PROCESSED) {
2268 open_local_endpoint(conn, 1);
2272 #if !defined(MONGOOSE_NO_DIRECTORY_LISTING) || !defined(MONGOOSE_NO_DAV)
2276 char d_name[MAX_PATH_SIZE];
2279 typedef struct DIR {
2281 WIN32_FIND_DATAW info;
2282 struct dirent result;
2285 // Implementation of POSIX opendir/closedir/readdir for Windows.
2286 static DIR *opendir(const char *name) {
2288 wchar_t wpath[MAX_PATH_SIZE];
2292 SetLastError(ERROR_BAD_ARGUMENTS);
2293 } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
2294 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
2296 to_wchar(name, wpath, ARRAY_SIZE(wpath));
2297 attrs = GetFileAttributesW(wpath);
2298 if (attrs != 0xFFFFFFFF &&
2299 ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
2300 (void) wcscat(wpath, L"\\*");
2301 dir->handle = FindFirstFileW(wpath, &dir->info);
2302 dir->result.d_name[0] = '\0';
2312 static int closedir(DIR *dir) {
2316 if (dir->handle != INVALID_HANDLE_VALUE)
2317 result = FindClose(dir->handle) ? 0 : -1;
2322 SetLastError(ERROR_BAD_ARGUMENTS);
2328 static struct dirent *readdir(DIR *dir) {
2329 struct dirent *result = 0;
2332 if (dir->handle != INVALID_HANDLE_VALUE) {
2333 result = &dir->result;
2334 (void) WideCharToMultiByte(CP_UTF8, 0,
2335 dir->info.cFileName, -1, result->d_name,
2336 sizeof(result->d_name), NULL, NULL);
2338 if (!FindNextFileW(dir->handle, &dir->info)) {
2339 (void) FindClose(dir->handle);
2340 dir->handle = INVALID_HANDLE_VALUE;
2344 SetLastError(ERROR_FILE_NOT_FOUND);
2347 SetLastError(ERROR_BAD_ARGUMENTS);
2352 #endif // _WIN32 POSIX opendir/closedir/readdir implementation
2354 static int scan_directory(struct connection *conn, const char *dir,
2355 struct dir_entry **arr) {
2356 char path[MAX_PATH_SIZE];
2357 struct dir_entry *p;
2359 int arr_size = 0, arr_ind = 0, inc = 100;
2363 if ((dirp = (opendir(dir))) == NULL) return 0;
2365 while ((dp = readdir(dirp)) != NULL) {
2366 // Do not show current dir and hidden files
2367 if (!strcmp(dp->d_name, ".") ||
2368 !strcmp(dp->d_name, "..") ||
2369 must_hide_file(conn, dp->d_name)) {
2372 mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
2374 // Resize the array if nesessary
2375 if (arr_ind >= arr_size) {
2376 if ((p = (struct dir_entry *)
2377 realloc(*arr, (inc + arr_size) * sizeof(**arr))) != NULL) {
2378 // Memset new chunk to zero, otherwize st_mtime will have garbage which
2379 // can make strftime() segfault, see
2380 // http://code.google.com/p/mongoose/issues/detail?id=79
2381 memset(p + arr_size, 0, sizeof(**arr) * inc);
2388 if (arr_ind < arr_size) {
2389 (*arr)[arr_ind].conn = conn;
2390 (*arr)[arr_ind].file_name = strdup(dp->d_name);
2391 stat(path, &(*arr)[arr_ind].st);
2400 static void mg_url_encode(const char *src, char *dst, size_t dst_len) {
2401 static const char *dont_escape = "._-$,;~()";
2402 static const char *hex = "0123456789abcdef";
2403 const char *end = dst + dst_len - 1;
2405 for (; *src != '\0' && dst < end; src++, dst++) {
2406 if (isalnum(*(const unsigned char *) src) ||
2407 strchr(dont_escape, * (const unsigned char *) src) != NULL) {
2409 } else if (dst + 2 < end) {
2411 dst[1] = hex[(* (const unsigned char *) src) >> 4];
2412 dst[2] = hex[(* (const unsigned char *) src) & 0xf];
2419 #endif // !NO_DIRECTORY_LISTING || !MONGOOSE_NO_DAV
2421 #ifndef MONGOOSE_NO_DIRECTORY_LISTING
2423 static void print_dir_entry(const struct dir_entry *de) {
2424 char size[64], mod[64], href[MAX_PATH_SIZE * 3], chunk[MAX_PATH_SIZE * 4];
2425 int64_t fsize = de->st.st_size;
2426 int is_dir = S_ISDIR(de->st.st_mode), n;
2427 const char *slash = is_dir ? "/" : "";
2430 mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
2432 // We use (signed) cast below because MSVC 6 compiler cannot
2433 // convert unsigned __int64 to double.
2435 mg_snprintf(size, sizeof(size), "%d", (int) fsize);
2436 } else if (fsize < 0x100000) {
2437 mg_snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0);
2438 } else if (fsize < 0x40000000) {
2439 mg_snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576);
2441 mg_snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824);
2444 strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.st_mtime));
2445 mg_url_encode(de->file_name, href, sizeof(href));
2446 n = mg_snprintf(chunk, sizeof(chunk),
2447 "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
2448 "<td> %s</td><td> %s</td></tr>\n",
2449 de->conn->mg_conn.uri, href, slash, de->file_name, slash,
2451 write_chunk((struct connection *) de->conn, chunk, n);
2454 // Sort directory entries by size, or name, or modification time.
2455 // On windows, __cdecl specification is needed in case if project is built
2456 // with __stdcall convention. qsort always requires __cdels callback.
2457 static int __cdecl compare_dir_entries(const void *p1, const void *p2) {
2458 const struct dir_entry *a = (const struct dir_entry *) p1,
2459 *b = (const struct dir_entry *) p2;
2460 const char *qs = a->conn->mg_conn.query_string ?
2461 a->conn->mg_conn.query_string : "na";
2464 if (S_ISDIR(a->st.st_mode) && !S_ISDIR(b->st.st_mode)) {
2465 return -1; // Always put directories on top
2466 } else if (!S_ISDIR(a->st.st_mode) && S_ISDIR(b->st.st_mode)) {
2467 return 1; // Always put directories on top
2468 } else if (*qs == 'n') {
2469 cmp_result = strcmp(a->file_name, b->file_name);
2470 } else if (*qs == 's') {
2471 cmp_result = a->st.st_size == b->st.st_size ? 0 :
2472 a->st.st_size > b->st.st_size ? 1 : -1;
2473 } else if (*qs == 'd') {
2474 cmp_result = a->st.st_mtime == b->st.st_mtime ? 0 :
2475 a->st.st_mtime > b->st.st_mtime ? 1 : -1;
2478 return qs[1] == 'd' ? -cmp_result : cmp_result;
2481 static void send_directory_listing(struct connection *conn, const char *dir) {
2483 struct dir_entry *arr = NULL;
2484 int i, num_entries, sort_direction = conn->mg_conn.query_string != NULL &&
2485 conn->mg_conn.query_string[1] == 'd' ? 'a' : 'd';
2487 conn->mg_conn.status_code = 200;
2488 mg_snprintf(buf, sizeof(buf), "%s",
2489 "HTTP/1.1 200 OK\r\n"
2490 "Transfer-Encoding: Chunked\r\n"
2491 "Content-Type: text/html; charset=utf-8\r\n\r\n");
2492 spool(&conn->remote_iobuf, buf, strlen(buf));
2494 mg_snprintf(buf, sizeof(buf),
2495 "<html><head><title>Index of %s</title>"
2496 "<style>th {text-align: left;}</style></head>"
2497 "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
2498 "<tr><th><a href=\"?n%c\">Name</a></th>"
2499 "<th><a href=\"?d%c\">Modified</a></th>"
2500 "<th><a href=\"?s%c\">Size</a></th></tr>"
2501 "<tr><td colspan=\"3\"><hr></td></tr>",
2502 conn->mg_conn.uri, conn->mg_conn.uri,
2503 sort_direction, sort_direction, sort_direction);
2504 write_chunk(conn, buf, strlen(buf));
2506 num_entries = scan_directory(conn, dir, &arr);
2507 qsort(arr, num_entries, sizeof(arr[0]), compare_dir_entries);
2508 for (i = 0; i < num_entries; i++) {
2509 print_dir_entry(&arr[i]);
2510 free(arr[i].file_name);
2514 write_terminating_chunk(conn);
2515 close_local_endpoint(conn);
2517 #endif // MONGOOSE_NO_DIRECTORY_LISTING
2519 #ifndef MONGOOSE_NO_DAV
2520 static void print_props(struct connection *conn, const char *uri,
2522 char mtime[64], buf[MAX_PATH_SIZE + 200];
2524 gmt_time_string(mtime, sizeof(mtime), &stp->st_mtime);
2525 mg_snprintf(buf, sizeof(buf),
2527 "<d:href>%s</d:href>"
2530 "<d:resourcetype>%s</d:resourcetype>"
2531 "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
2532 "<d:getlastmodified>%s</d:getlastmodified>"
2534 "<d:status>HTTP/1.1 200 OK</d:status>"
2537 uri, S_ISDIR(stp->st_mode) ? "<d:collection/>" : "",
2538 (int64_t) stp->st_size, mtime);
2539 spool(&conn->remote_iobuf, buf, strlen(buf));
2542 static void handle_propfind(struct connection *conn, const char *path,
2544 static const char header[] = "HTTP/1.1 207 Multi-Status\r\n"
2545 "Connection: close\r\n"
2546 "Content-Type: text/xml; charset=utf-8\r\n\r\n"
2547 "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
2548 "<d:multistatus xmlns:d='DAV:'>\n";
2549 static const char footer[] = "</d:multistatus>";
2550 const char *depth = mg_get_header(&conn->mg_conn, "Depth"),
2551 *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
2553 conn->mg_conn.status_code = 207;
2554 spool(&conn->remote_iobuf, header, sizeof(header) - 1);
2556 // Print properties for the requested resource itself
2557 print_props(conn, conn->mg_conn.uri, stp);
2559 // If it is a directory, print directory entries too if Depth is not 0
2560 if (S_ISDIR(stp->st_mode) && !mg_strcasecmp(list_dir, "yes") &&
2561 (depth == NULL || strcmp(depth, "0") != 0)) {
2562 struct dir_entry *arr = NULL;
2563 int i, num_entries = scan_directory(conn, path, &arr);
2565 for (i = 0; i < num_entries; i++) {
2566 char buf[MAX_PATH_SIZE], buf2[sizeof(buf) * 3];
2567 struct dir_entry *de = &arr[i];
2569 mg_snprintf(buf, sizeof(buf), "%s%s", de->conn->mg_conn.uri,
2571 mg_url_encode(buf, buf2, sizeof(buf2) - 1);
2572 print_props(conn, buf, &de->st);
2576 spool(&conn->remote_iobuf, footer, sizeof(footer) - 1);
2577 close_local_endpoint(conn);
2580 static void handle_mkcol(struct connection *conn, const char *path) {
2581 int status_code = 500;
2583 if (conn->mg_conn.content_len > 0) {
2585 } else if (!mkdir(path, 0755)) {
2587 } else if (errno == EEXIST) {
2589 } else if (errno == EACCES) {
2591 } else if (errno == ENOENT) {
2594 send_http_error(conn, status_code, NULL);
2597 static int remove_directory(const char *dir) {
2598 char path[MAX_PATH_SIZE];
2603 if ((dirp = opendir(dir)) == NULL) return 0;
2605 while ((dp = readdir(dirp)) != NULL) {
2606 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
2607 mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
2609 if (S_ISDIR(st.st_mode)) {
2610 remove_directory(path);
2621 static void handle_delete(struct connection *conn, const char *path) {
2624 if (stat(path, &st) != 0) {
2625 send_http_error(conn, 404, NULL);
2626 } else if (S_ISDIR(st.st_mode)) {
2627 remove_directory(path);
2628 send_http_error(conn, 204, NULL);
2629 } else if (!remove(path) == 0) {
2630 send_http_error(conn, 204, NULL);
2632 send_http_error(conn, 423, NULL);
2636 // For a given PUT path, create all intermediate subdirectories
2637 // for given path. Return 0 if the path itself is a directory,
2638 // or -1 on error, 1 if OK.
2639 static int put_dir(const char *path) {
2640 char buf[MAX_PATH_SIZE];
2644 // Create intermediate directories if they do not exist
2645 for (s = p = path + 1; (p = strchr(s, '/')) != NULL; s = ++p) {
2646 if (p - path >= (int) sizeof(buf)) return -1; // Buffer overflow
2647 memcpy(buf, path, p - path);
2648 buf[p - path] = '\0';
2649 if (stat(buf, &st) != 0 && mkdir(buf, 0755) != 0) return -1;
2650 if (p[1] == '\0') return 0; // Path is a directory itself
2656 static void handle_put(struct connection *conn, const char *path) {
2658 const char *range, *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
2662 conn->mg_conn.status_code = !stat(path, &st) ? 200 : 201;
2663 if ((rc = put_dir(path)) == 0) {
2664 mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\n\r\n",
2665 conn->mg_conn.status_code);
2666 close_local_endpoint(conn);
2667 } else if (rc == -1) {
2668 send_http_error(conn, 500, "put_dir: %s", strerror(errno));
2669 } else if (cl_hdr == NULL) {
2670 send_http_error(conn, 411, NULL);
2672 //On Windows, open() is a macro with 2 params
2673 } else if ((conn->endpoint.fd =
2674 open(path, O_RDWR | O_CREAT | O_TRUNC)) < 0) {
2676 } else if ((conn->endpoint.fd =
2677 open(path, O_RDWR | O_CREAT | O_TRUNC, 0644)) < 0) {
2679 send_http_error(conn, 500, "open(%s): %s", path, strerror(errno));
2681 DBG(("PUT [%s] %d", path, conn->local_iobuf.len));
2682 conn->endpoint_type = EP_PUT;
2683 set_close_on_exec(conn->endpoint.fd);
2684 range = mg_get_header(&conn->mg_conn, "Content-Range");
2685 conn->cl = to64(cl_hdr);
2687 if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
2688 conn->mg_conn.status_code = 206;
2689 lseek(conn->endpoint.fd, r1, SEEK_SET);
2690 conn->cl = r2 > r1 ? r2 - r1 + 1: conn->cl - r1;
2692 mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n",
2693 conn->mg_conn.status_code);
2697 static void forward_put_data(struct connection *conn) {
2698 struct iobuf *io = &conn->local_iobuf;
2699 int n = write(conn->endpoint.fd, io->buf, io->len);
2701 discard_leading_iobuf_bytes(io, n);
2703 if (conn->cl <= 0) {
2704 close_local_endpoint(conn);
2708 #endif // MONGOOSE_NO_DAV
2710 static void send_options(struct connection *conn) {
2711 static const char reply[] = "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, "
2712 "CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\nDAV: 1\r\n\r\n";
2713 spool(&conn->remote_iobuf, reply, sizeof(reply) - 1);
2714 conn->flags |= CONN_SPOOL_DONE;
2717 #ifndef MONGOOSE_NO_AUTH
2718 void mg_send_digest_auth_request(struct mg_connection *c) {
2719 struct connection *conn = (struct connection *) c;
2720 c->status_code = 401;
2722 "HTTP/1.1 401 Unauthorized\r\n"
2723 "WWW-Authenticate: Digest qop=\"auth\", "
2724 "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
2725 conn->server->config_options[AUTH_DOMAIN],
2726 (unsigned long) time(NULL));
2727 close_local_endpoint(conn);
2730 // Use the global passwords file, if specified by auth_gpass option,
2731 // or search for .htpasswd in the requested directory.
2732 static FILE *open_auth_file(struct connection *conn, const char *path) {
2733 char name[MAX_PATH_SIZE];
2734 const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE];
2738 if (gpass != NULL) {
2739 // Use global passwords file
2740 fp = fopen(gpass, "r");
2741 } else if (!stat(path, &st) && S_ISDIR(st.st_mode)) {
2742 mg_snprintf(name, sizeof(name), "%s%c%s", path, '/', PASSWORDS_FILE_NAME);
2743 fp = fopen(name, "r");
2745 // Try to find .htpasswd in requested directory.
2746 if ((p = strrchr(path, '/')) == NULL) p = path;
2747 mg_snprintf(name, sizeof(name), "%.*s%c%s",
2748 (int) (p - path), path, '/', PASSWORDS_FILE_NAME);
2749 fp = fopen(name, "r");
2755 #if !defined(HAVE_MD5) && !defined(MONGOOSE_NO_AUTH)
2756 typedef struct MD5Context {
2759 unsigned char in[64];
2762 static void byteReverse(unsigned char *buf, unsigned longs) {
2765 // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN
2766 if (is_big_endian()) {
2768 t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
2769 ((unsigned) buf[1] << 8 | buf[0]);
2770 * (uint32_t *) buf = t;
2776 #define F1(x, y, z) (z ^ (x & (y ^ z)))
2777 #define F2(x, y, z) F1(z, x, y)
2778 #define F3(x, y, z) (x ^ y ^ z)
2779 #define F4(x, y, z) (y ^ (x | ~z))
2781 #define MD5STEP(f, w, x, y, z, data, s) \
2782 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
2784 // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
2785 // initialization constants.
2786 static void MD5Init(MD5_CTX *ctx) {
2787 ctx->buf[0] = 0x67452301;
2788 ctx->buf[1] = 0xefcdab89;
2789 ctx->buf[2] = 0x98badcfe;
2790 ctx->buf[3] = 0x10325476;
2796 static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
2797 register uint32_t a, b, c, d;
2804 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
2805 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
2806 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
2807 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
2808 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
2809 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
2810 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
2811 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
2812 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
2813 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
2814 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
2815 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
2816 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
2817 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
2818 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
2819 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
2821 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
2822 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
2823 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
2824 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
2825 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
2826 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
2827 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
2828 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
2829 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
2830 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
2831 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
2832 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
2833 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
2834 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
2835 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
2836 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
2838 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
2839 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
2840 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
2841 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
2842 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
2843 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
2844 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
2845 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
2846 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
2847 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
2848 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
2849 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
2850 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
2851 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
2852 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
2853 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
2855 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
2856 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
2857 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
2858 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
2859 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
2860 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
2861 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
2862 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
2863 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
2864 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
2865 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
2866 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
2867 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
2868 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
2869 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
2870 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
2878 static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
2882 if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
2884 ctx->bits[1] += len >> 29;
2886 t = (t >> 3) & 0x3f;
2889 unsigned char *p = (unsigned char *) ctx->in + t;
2893 memcpy(p, buf, len);
2897 byteReverse(ctx->in, 16);
2898 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
2904 memcpy(ctx->in, buf, 64);
2905 byteReverse(ctx->in, 16);
2906 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
2911 memcpy(ctx->in, buf, len);
2914 static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
2919 count = (ctx->bits[0] >> 3) & 0x3F;
2921 p = ctx->in + count;
2923 count = 64 - 1 - count;
2925 memset(p, 0, count);
2926 byteReverse(ctx->in, 16);
2927 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
2928 memset(ctx->in, 0, 56);
2930 memset(p, 0, count - 8);
2932 byteReverse(ctx->in, 14);
2934 a = (uint32_t *)ctx->in;
2935 a[14] = ctx->bits[0];
2936 a[15] = ctx->bits[1];
2938 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
2939 byteReverse((unsigned char *) ctx->buf, 4);
2940 memcpy(digest, ctx->buf, 16);
2941 memset((char *) ctx, 0, sizeof(*ctx));
2947 // Stringify binary data. Output buffer must be twice as big as input,
2948 // because each byte takes 2 bytes in string representation
2949 static void bin2str(char *to, const unsigned char *p, size_t len) {
2950 static const char *hex = "0123456789abcdef";
2952 for (; len--; p++) {
2953 *to++ = hex[p[0] >> 4];
2954 *to++ = hex[p[0] & 0x0f];
2959 // Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
2960 char *mg_md5(char buf[33], ...) {
2961 unsigned char hash[16];
2969 while ((p = va_arg(ap, const char *)) != NULL) {
2970 MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
2974 MD5Final(hash, &ctx);
2975 bin2str(buf, hash, sizeof(hash));
2979 // Check the user's password, return 1 if OK
2980 static int check_password(const char *method, const char *ha1, const char *uri,
2981 const char *nonce, const char *nc, const char *cnonce,
2982 const char *qop, const char *response) {
2983 char ha2[32 + 1], expected_response[32 + 1];
2986 // Check for authentication timeout
2987 if ((unsigned long) time(NULL) - (unsigned long) to64(nonce) > 3600) {
2992 mg_md5(ha2, method, ":", uri, NULL);
2993 mg_md5(expected_response, ha1, ":", nonce, ":", nc,
2994 ":", cnonce, ":", qop, ":", ha2, NULL);
2996 return mg_strcasecmp(response, expected_response) == 0 ?
2997 MG_AUTH_OK : MG_AUTH_FAIL;
3001 // Authorize against the opened passwords file. Return 1 if authorized.
3002 int mg_authorize_digest(struct mg_connection *c, FILE *fp) {
3003 struct connection *conn = (struct connection *) c;
3005 char line[256], f_user[256], ha1[256], f_domain[256], user[100], nonce[100],
3006 uri[MAX_REQUEST_SIZE], cnonce[100], resp[100], qop[100], nc[100];
3008 if (c == NULL || fp == NULL) return 0;
3009 if ((hdr = mg_get_header(c, "Authorization")) == NULL ||
3010 mg_strncasecmp(hdr, "Digest ", 7) != 0) return 0;
3011 if (!mg_parse_header(hdr, "username", user, sizeof(user))) return 0;
3012 if (!mg_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce))) return 0;
3013 if (!mg_parse_header(hdr, "response", resp, sizeof(resp))) return 0;
3014 if (!mg_parse_header(hdr, "uri", uri, sizeof(uri))) return 0;
3015 if (!mg_parse_header(hdr, "qop", qop, sizeof(qop))) return 0;
3016 if (!mg_parse_header(hdr, "nc", nc, sizeof(nc))) return 0;
3017 if (!mg_parse_header(hdr, "nonce", nonce, sizeof(nonce))) return 0;
3019 while (fgets(line, sizeof(line), fp) != NULL) {
3020 if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) == 3 &&
3021 !strcmp(user, f_user) &&
3022 // NOTE(lsm): due to a bug in MSIE, we do not compare URIs
3023 !strcmp(conn->server->config_options[AUTH_DOMAIN], f_domain))
3024 return check_password(c->request_method, ha1, uri,
3025 nonce, nc, cnonce, qop, resp);
3027 return MG_AUTH_FAIL;
3031 // Return 1 if request is authorised, 0 otherwise.
3032 static int is_authorized(struct connection *conn, const char *path) {
3034 int authorized = MG_AUTH_OK;
3036 if ((fp = open_auth_file(conn, path)) != NULL) {
3037 authorized = mg_authorize_digest(&conn->mg_conn, fp);
3044 static int is_authorized_for_dav(struct connection *conn) {
3045 const char *auth_file = conn->server->config_options[DAV_AUTH_FILE];
3047 int authorized = MG_AUTH_FAIL;
3049 if (auth_file != NULL && (fp = fopen(auth_file, "r")) != NULL) {
3050 authorized = mg_authorize_digest(&conn->mg_conn, fp);
3057 static int is_dav_mutation(const struct connection *conn) {
3058 const char *s = conn->mg_conn.request_method;
3059 return s && (!strcmp(s, "PUT") || !strcmp(s, "DELETE") ||
3060 !strcmp(s, "MKCOL"));
3062 #endif // MONGOOSE_NO_AUTH
3064 int parse_header(const char *str, int str_len, const char *var_name, char *buf,
3066 int ch = ' ', len = 0, n = strlen(var_name);
3067 const char *p, *end = str + str_len, *s = NULL;
3069 if (buf != NULL && buf_size > 0) buf[0] = '\0';
3071 // Find where variable starts
3072 for (s = str; s != NULL && s + n < end; s++) {
3073 if ((s == str || s[-1] == ' ' || s[-1] == ',') && s[n] == '=' &&
3074 !memcmp(s, var_name, n)) break;
3077 if (s != NULL && &s[n + 1] < end) {
3079 if (*s == '"' || *s == '\'') ch = *s++;
3081 while (p < end && p[0] != ch && p[0] != ',' && len < (int) buf_size) {
3082 if (p[0] == '\\' && p[1] == ch) p++;
3085 if (len >= (int) buf_size || (ch != ' ' && *p != ch)) {
3088 if (len > 0 && s[len - 1] == ',') len--;
3089 if (len > 0 && s[len - 1] == ';') len--;
3097 int mg_parse_header(const char *s, const char *var_name, char *buf,
3099 return parse_header(s, s == NULL ? 0 : strlen(s), var_name, buf, buf_size);
3102 #ifdef MONGOOSE_USE_LUA
3103 #include "lua_5.2.1.h"
3106 static void *mmap(void *addr, int64_t len, int prot, int flags, int fd,
3108 HANDLE fh = (HANDLE) _get_osfhandle(fd);
3109 HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0);
3110 void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len);
3114 #define munmap(x, y) UnmapViewOfFile(x)
3115 #define MAP_FAILED NULL
3116 #define MAP_PRIVATE 0
3119 #include <sys/mman.h>
3122 static void reg_string(struct lua_State *L, const char *name, const char *val) {
3123 lua_pushstring(L, name);
3124 lua_pushstring(L, val);
3128 static void reg_int(struct lua_State *L, const char *name, int val) {
3129 lua_pushstring(L, name);
3130 lua_pushinteger(L, val);
3134 static void reg_function(struct lua_State *L, const char *name,
3135 lua_CFunction func, struct mg_connection *conn) {
3136 lua_pushstring(L, name);
3137 lua_pushlightuserdata(L, conn);
3138 lua_pushcclosure(L, func, 1);
3142 static int lua_write(lua_State *L) {
3146 struct mg_connection *conn = (struct mg_connection *)
3147 lua_touserdata(L, lua_upvalueindex(1));
3149 num_args = lua_gettop(L);
3150 for (i = 1; i <= num_args; i++) {
3151 if (lua_isstring(L, i)) {
3152 str = lua_tolstring(L, i, &size);
3153 mg_write(conn, str, size);
3160 static int lsp_sock_close(lua_State *L) {
3161 if (lua_gettop(L) > 0 && lua_istable(L, -1)) {
3162 lua_getfield(L, -1, "sock");
3163 closesocket((sock_t) lua_tonumber(L, -1));
3165 return luaL_error(L, "invalid :close() call");
3170 static int lsp_sock_recv(lua_State *L) {
3174 if (lua_gettop(L) > 0 && lua_istable(L, -1)) {
3175 lua_getfield(L, -1, "sock");
3176 n = recv((sock_t) lua_tonumber(L, -1), buf, sizeof(buf), 0);
3180 lua_pushlstring(L, buf, n);
3183 return luaL_error(L, "invalid :close() call");
3188 static int lsp_sock_send(lua_State *L) {
3190 size_t len, sent = 0;
3193 if (lua_gettop(L) > 1 && lua_istable(L, -2) && lua_isstring(L, -1)) {
3194 buf = lua_tolstring(L, -1, &len);
3195 lua_getfield(L, -2, "sock");
3196 sock = (int) lua_tonumber(L, -1);
3197 while (sent < len) {
3198 if ((n = send(sock, buf + sent, len - sent, 0)) <= 0) break;
3201 lua_pushnumber(L, sent);
3203 return luaL_error(L, "invalid :close() call");
3208 static const struct luaL_Reg luasocket_methods[] = {
3209 {"close", lsp_sock_close},
3210 {"send", lsp_sock_send},
3211 {"recv", lsp_sock_recv},
3215 static sock_t conn2(const char *host, int port) {
3216 struct sockaddr_in sin;
3217 struct hostent *he = NULL;
3218 sock_t sock = INVALID_SOCKET;
3221 (he = gethostbyname(host)) != NULL &&
3222 (sock = socket(PF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET) {
3223 set_close_on_exec(sock);
3224 sin.sin_family = AF_INET;
3225 sin.sin_port = htons((uint16_t) port);
3226 sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
3227 if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
3229 sock = INVALID_SOCKET;
3235 static int lsp_connect(lua_State *L) {
3238 if (lua_isstring(L, -2) && lua_isnumber(L, -1)) {
3239 sock = conn2(lua_tostring(L, -2), (int) lua_tonumber(L, -1));
3240 if (sock == INVALID_SOCKET) {
3244 reg_int(L, "sock", sock);
3245 reg_string(L, "host", lua_tostring(L, -4));
3246 luaL_getmetatable(L, "luasocket");
3247 lua_setmetatable(L, -2);
3250 return luaL_error(L, "connect(host,port): invalid parameter given.");
3255 static void prepare_lua_environment(struct mg_connection *ri, lua_State *L) {
3256 extern void luaL_openlibs(lua_State *);
3260 #ifdef MONGOOSE_USE_LUA_SQLITE3
3261 { extern int luaopen_lsqlite3(lua_State *); luaopen_lsqlite3(L); }
3264 luaL_newmetatable(L, "luasocket");
3265 lua_pushliteral(L, "__index");
3266 luaL_newlib(L, luasocket_methods);
3269 lua_register(L, "connect", lsp_connect);
3271 if (ri == NULL) return;
3273 // Register mg module
3275 reg_function(L, "write", lua_write, ri);
3277 // Export request_info
3278 lua_pushstring(L, "request_info");
3280 reg_string(L, "request_method", ri->request_method);
3281 reg_string(L, "uri", ri->uri);
3282 reg_string(L, "http_version", ri->http_version);
3283 reg_string(L, "query_string", ri->query_string);
3284 reg_string(L, "remote_ip", ri->remote_ip);
3285 reg_int(L, "remote_port", ri->remote_port);
3286 lua_pushstring(L, "content");
3287 lua_pushlstring(L, ri->content == NULL ? "" : ri->content, 0);
3289 reg_int(L, "content_len", ri->content_len);
3290 reg_int(L, "num_headers", ri->num_headers);
3291 lua_pushstring(L, "http_headers");
3293 for (i = 0; i < ri->num_headers; i++) {
3294 reg_string(L, ri->http_headers[i].name, ri->http_headers[i].value);
3299 lua_setglobal(L, "mg");
3301 // Register default mg.onerror function
3302 (void) luaL_dostring(L, "mg.onerror = function(e) mg.write('\\nLua "
3303 "error:\\n', debug.traceback(e, 1)) end");
3306 static int lua_error_handler(lua_State *L) {
3307 const char *error_msg = lua_isstring(L, -1) ? lua_tostring(L, -1) : "?\n";
3309 lua_getglobal(L, "mg");
3310 if (!lua_isnil(L, -1)) {
3311 lua_getfield(L, -1, "write"); // call mg.write()
3312 lua_pushstring(L, error_msg);
3313 lua_pushliteral(L, "\n");
3315 (void) luaL_dostring(L, "mg.write(debug.traceback(), '\\n')");
3317 printf("Lua error: [%s]\n", error_msg);
3318 (void) luaL_dostring(L, "print(debug.traceback(), '\\n')");
3320 // TODO(lsm): leave the stack balanced
3325 static void lsp(struct connection *conn, const char *p, int len, lua_State *L) {
3328 for (i = 0; i < len; i++) {
3329 if (p[i] == '<' && p[i + 1] == '?') {
3330 for (j = i + 1; j < len ; j++) {
3331 if (p[j] == '?' && p[j + 1] == '>') {
3332 mg_write(&conn->mg_conn, p + pos, i - pos);
3333 if (luaL_loadbuffer(L, p + (i + 2), j - (i + 2), "") == LUA_OK) {
3334 lua_pcall(L, 0, LUA_MULTRET, 0);
3343 if (i > pos) mg_write(&conn->mg_conn, p + pos, i - pos);
3346 static void handle_lsp_request(struct connection *conn, const char *path,
3349 lua_State *L = NULL;
3352 if ((fp = fopen(path, "r")) == NULL ||
3353 (p = mmap(NULL, st->st_size, PROT_READ, MAP_PRIVATE,
3354 fileno(fp), 0)) == MAP_FAILED ||
3355 (L = luaL_newstate()) == NULL) {
3356 send_http_error(conn, 500, "mmap(%s): %s", path, strerror(errno));
3358 // We're not sending HTTP headers here, Lua page must do it.
3359 prepare_lua_environment(&conn->mg_conn, L);
3360 lua_pushcclosure(L, &lua_error_handler, 0);
3361 lua_pushglobaltable(L);
3362 lsp(conn, p, (int) st->st_size, L);
3363 close_local_endpoint(conn);
3366 if (L != NULL) lua_close(L);
3367 if (p != NULL) munmap(p, st->st_size);
3368 if (fp != NULL) fclose(fp);
3370 #endif // MONGOOSE_USE_LUA
3372 static void open_local_endpoint(struct connection *conn, int skip_user) {
3373 #ifndef MONGOOSE_NO_FILESYSTEM
3374 static const char lua_pat[] = LUA_SCRIPT_PATTERN;
3376 char path[MAX_PATH_SIZE];
3377 int exists = 0, is_directory = 0;
3378 #ifndef MONGOOSE_NO_CGI
3379 const char *cgi_pat = conn->server->config_options[CGI_PATTERN];
3381 const char *cgi_pat = DEFAULT_CGI_PATTERN;
3383 #ifndef MONGOOSE_NO_DIRECTORY_LISTING
3384 const char *dir_lst = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
3386 const char *dir_lst = "yes";
3390 #ifndef MONGOOSE_NO_AUTH
3391 // Call auth handler
3392 if (conn->server->auth_handler != NULL &&
3393 conn->server->auth_handler(&conn->mg_conn) == MG_AUTH_FAIL) {
3394 mg_send_digest_auth_request(&conn->mg_conn);
3399 // Call URI handler if one is registered for this URI
3400 if (skip_user == 0 && conn->server->request_handler != NULL) {
3401 conn->endpoint_type = EP_USER;
3402 #if MONGOOSE_USE_POST_SIZE_LIMIT > 1
3404 const char *cl = mg_get_header(&conn->mg_conn, "Content-Length");
3405 if (!strcmp(conn->mg_conn.request_method, "POST") &&
3406 (cl == NULL || to64(cl) > MONGOOSE_USE_POST_SIZE_LIMIT)) {
3407 send_http_error(conn, 500, "POST size > %zu",
3408 (size_t) MONGOOSE_USE_POST_SIZE_LIMIT);
3415 #ifdef MONGOOSE_NO_FILESYSTEM
3416 if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
3419 send_http_error(conn, 404, NULL);
3422 exists = convert_uri_to_file_name(conn, path, sizeof(path), &st);
3423 is_directory = S_ISDIR(st.st_mode);
3425 if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
3427 } else if (conn->server->config_options[DOCUMENT_ROOT] == NULL) {
3428 send_http_error(conn, 404, NULL);
3429 #ifndef MONGOOSE_NO_AUTH
3430 } else if ((!is_dav_mutation(conn) && !is_authorized(conn, path)) ||
3431 (is_dav_mutation(conn) && !is_authorized_for_dav(conn))) {
3432 mg_send_digest_auth_request(&conn->mg_conn);
3433 close_local_endpoint(conn);
3435 #ifndef MONGOOSE_NO_DAV
3436 } else if (!strcmp(conn->mg_conn.request_method, "PROPFIND")) {
3437 handle_propfind(conn, path, &st);
3438 } else if (!strcmp(conn->mg_conn.request_method, "MKCOL")) {
3439 handle_mkcol(conn, path);
3440 } else if (!strcmp(conn->mg_conn.request_method, "DELETE")) {
3441 handle_delete(conn, path);
3442 } else if (!strcmp(conn->mg_conn.request_method, "PUT")) {
3443 handle_put(conn, path);
3445 } else if (!exists || must_hide_file(conn, path)) {
3446 send_http_error(conn, 404, NULL);
3447 } else if (is_directory &&
3448 conn->mg_conn.uri[strlen(conn->mg_conn.uri) - 1] != '/') {
3449 conn->mg_conn.status_code = 301;
3450 mg_printf(&conn->mg_conn, "HTTP/1.1 301 Moved Permanently\r\n"
3451 "Location: %s/\r\n\r\n", conn->mg_conn.uri);
3452 close_local_endpoint(conn);
3453 } else if (is_directory && !find_index_file(conn, path, sizeof(path), &st)) {
3454 if (!mg_strcasecmp(dir_lst, "yes")) {
3455 #ifndef MONGOOSE_NO_DIRECTORY_LISTING
3456 send_directory_listing(conn, path);
3458 send_http_error(conn, 501, NULL);
3461 send_http_error(conn, 403, NULL);
3463 } else if (match_prefix(lua_pat, sizeof(lua_pat) - 1, path) > 0) {
3464 #ifdef MONGOOSE_USE_LUA
3465 handle_lsp_request(conn, path, &st);
3467 send_http_error(conn, 501, NULL);
3469 } else if (match_prefix(cgi_pat, strlen(cgi_pat), path) > 0) {
3470 #if !defined(MONGOOSE_NO_CGI)
3471 open_cgi_endpoint(conn, path);
3473 send_http_error(conn, 501, NULL);
3474 #endif // !MONGOOSE_NO_CGI
3475 } else if (is_not_modified(conn, &st)) {
3476 send_http_error(conn, 304, NULL);
3477 } else if ((conn->endpoint.fd = open(path, O_RDONLY | O_BINARY)) != -1) {
3478 // O_BINARY is required for Windows, otherwise in default text mode
3479 // two bytes \r\n will be read as one.
3480 open_file_endpoint(conn, path, &st);
3482 send_http_error(conn, 404, NULL);
3484 #endif // MONGOOSE_NO_FILESYSTEM
3487 static void send_continue_if_expected(struct connection *conn) {
3488 static const char expect_response[] = "HTTP/1.1 100 Continue\r\n\r\n";
3489 const char *expect_hdr = mg_get_header(&conn->mg_conn, "Expect");
3491 if (expect_hdr != NULL && !mg_strcasecmp(expect_hdr, "100-continue")) {
3492 spool(&conn->remote_iobuf, expect_response, sizeof(expect_response) - 1);
3496 static int is_valid_uri(const char *uri) {
3497 // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
3498 // URI can be an asterisk (*) or should start with slash.
3499 return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
3502 static void try_http_parse_and_set_content_length(struct connection *conn) {
3503 struct iobuf *io = &conn->local_iobuf;
3505 if (conn->request_len == 0 &&
3506 (conn->request_len = get_request_len(io->buf, io->len)) > 0) {
3507 // If request is buffered in, remove it from the iobuf. This is because
3508 // iobuf could be reallocated, and pointers in parsed request could
3510 conn->request = (char *) malloc(conn->request_len);
3511 memcpy(conn->request, io->buf, conn->request_len);
3512 DBG(("%p [%.*s]", conn, conn->request_len, conn->request));
3513 discard_leading_iobuf_bytes(io, conn->request_len);
3514 conn->request_len = parse_http_message(conn->request, conn->request_len,
3516 if (conn->request_len > 0) {
3517 const char *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
3518 conn->cl = cl_hdr == NULL ? 0 : to64(cl_hdr);
3519 conn->mg_conn.content_len = (long int) conn->cl;
3524 static void process_request(struct connection *conn) {
3525 struct iobuf *io = &conn->local_iobuf;
3527 try_http_parse_and_set_content_length(conn);
3528 DBG(("%p %d %d %d [%.*s]", conn, conn->request_len, io->len, conn->flags,
3530 if (conn->request_len < 0 ||
3531 (conn->request_len > 0 && !is_valid_uri(conn->mg_conn.uri))) {
3532 send_http_error(conn, 400, NULL);
3533 } else if (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE) {
3534 send_http_error(conn, 413, NULL);
3535 } else if (conn->request_len > 0 &&
3536 strcmp(conn->mg_conn.http_version, "1.0") != 0 &&
3537 strcmp(conn->mg_conn.http_version, "1.1") != 0) {
3538 send_http_error(conn, 505, NULL);
3539 } else if (conn->request_len > 0 && conn->endpoint_type == EP_NONE) {
3540 #ifndef MONGOOSE_NO_WEBSOCKET
3541 send_websocket_handshake_if_requested(&conn->mg_conn);
3543 send_continue_if_expected(conn);
3544 open_local_endpoint(conn, 0);
3547 #ifndef MONGOOSE_NO_CGI
3548 if (conn->endpoint_type == EP_CGI && io->len > 0) {
3549 forward_post_data(conn);
3552 if (conn->endpoint_type == EP_USER) {
3553 call_request_handler_if_data_is_buffered(conn);
3555 #ifndef MONGOOSE_NO_DAV
3556 if (conn->endpoint_type == EP_PUT && io->len > 0) {
3557 forward_put_data(conn);
3562 static void call_http_client_handler(struct connection *conn, int code) {
3563 conn->mg_conn.status_code = code;
3564 // For responses without Content-Lengh, use the whole buffer
3565 if (conn->cl == 0 && code == MG_DOWNLOAD_SUCCESS) {
3566 conn->mg_conn.content_len = conn->local_iobuf.len;
3568 conn->mg_conn.content = conn->local_iobuf.buf;
3569 if (conn->handler(&conn->mg_conn) || code == MG_CONNECT_FAILURE ||
3570 code == MG_DOWNLOAD_FAILURE) {
3571 conn->flags |= CONN_CLOSE;
3573 discard_leading_iobuf_bytes(&conn->local_iobuf, conn->mg_conn.content_len);
3574 conn->flags = conn->mg_conn.status_code = 0;
3575 conn->cl = conn->num_bytes_sent = conn->request_len = 0;
3576 free(conn->request);
3577 conn->request = NULL;
3580 static void process_response(struct connection *conn) {
3581 struct iobuf *io = &conn->local_iobuf;
3583 try_http_parse_and_set_content_length(conn);
3584 DBG(("%p %d %d [%.*s]", conn, conn->request_len, io->len,
3585 io->len > 40 ? 40 : io->len, io->buf));
3586 if (conn->request_len < 0 ||
3587 (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE)) {
3588 call_http_client_handler(conn, MG_DOWNLOAD_FAILURE);
3590 if (io->len >= conn->cl) {
3591 call_http_client_handler(conn, MG_DOWNLOAD_SUCCESS);
3595 static void read_from_socket(struct connection *conn) {
3596 char buf[IOBUF_SIZE];
3599 if (conn->endpoint_type == EP_CLIENT && conn->flags & CONN_CONNECTING) {
3600 callback_http_client_on_connect(conn);
3604 #ifdef MONGOOSE_USE_SSL
3605 if (conn->ssl != NULL) {
3606 if (conn->flags & CONN_SSL_HANDS_SHAKEN) {
3607 n = SSL_read(conn->ssl, buf, sizeof(buf));
3609 if (SSL_accept(conn->ssl) == 1) {
3610 conn->flags |= CONN_SSL_HANDS_SHAKEN;
3617 n = recv(conn->client_sock, buf, sizeof(buf), 0);
3620 DBG(("%p %d %d (1)", conn, n, conn->flags));
3622 if (conn->endpoint_type == EP_CLIENT && conn->local_iobuf.len > 0) {
3623 call_http_client_handler(conn, MG_DOWNLOAD_SUCCESS);
3625 conn->flags |= CONN_CLOSE;
3627 spool(&conn->local_iobuf, buf, n);
3628 if (conn->endpoint_type == EP_CLIENT) {
3629 process_response(conn);
3631 process_request(conn);
3634 DBG(("%p %d %d (2)", conn, n, conn->flags));
3637 int mg_connect(struct mg_server *server, const char *host, int port,
3638 int use_ssl, mg_handler_t handler, void *param) {
3639 sock_t sock = INVALID_SOCKET;
3640 struct sockaddr_in sin;
3641 struct hostent *he = NULL;
3642 struct connection *conn = NULL;
3643 int connect_ret_val;
3645 if (host == NULL || (he = gethostbyname(host)) == NULL ||
3646 (sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) return 0;
3647 #ifndef MONGOOSE_USE_SSL
3648 if (use_ssl) return 0;
3651 sin.sin_family = AF_INET;
3652 sin.sin_port = htons((uint16_t) port);
3653 sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
3654 set_non_blocking_mode(sock);
3656 connect_ret_val = connect(sock, (struct sockaddr *) &sin, sizeof(sin));
3657 if (is_error(connect_ret_val)) {
3659 } else if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) {
3664 conn->server = server;
3665 conn->client_sock = sock;
3666 conn->endpoint_type = EP_CLIENT;
3667 conn->handler = handler;
3668 conn->mg_conn.server_param = server->server_data;
3669 conn->mg_conn.connection_param = param;
3670 conn->birth_time = conn->last_activity_time = time(NULL);
3671 conn->flags = CONN_CONNECTING;
3672 conn->mg_conn.status_code = MG_CONNECT_FAILURE;
3673 #ifdef MONGOOSE_USE_SSL
3674 if (use_ssl && (conn->ssl = SSL_new(server->client_ssl_ctx)) != NULL) {
3675 SSL_set_fd(conn->ssl, sock);
3678 LINKED_LIST_ADD_TO_FRONT(&server->active_connections, &conn->link);
3679 DBG(("%p %s:%d", conn, host, port));
3684 #ifndef MONGOOSE_NO_LOGGING
3685 static void log_header(const struct mg_connection *conn, const char *header,
3687 const char *header_value;
3689 if ((header_value = mg_get_header(conn, header)) == NULL) {
3690 (void) fprintf(fp, "%s", " -");
3692 (void) fprintf(fp, " \"%s\"", header_value);
3696 static void log_access(const struct connection *conn, const char *path) {
3697 const struct mg_connection *c = &conn->mg_conn;
3698 FILE *fp = (path == NULL) ? NULL : fopen(path, "a+");
3699 char date[64], user[100];
3701 if (fp == NULL) return;
3702 strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
3703 localtime(&conn->birth_time));
3706 mg_parse_header(mg_get_header(&conn->mg_conn, "Authorization"), "username",
3707 user, sizeof(user));
3708 fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
3709 c->remote_ip, user[0] == '\0' ? "-" : user, date,
3710 c->request_method ? c->request_method : "-",
3711 c->uri ? c->uri : "-", c->http_version,
3712 c->status_code, conn->num_bytes_sent);
3713 log_header(c, "Referer", fp);
3714 log_header(c, "User-Agent", fp);
3723 static void close_local_endpoint(struct connection *conn) {
3724 struct mg_connection *c = &conn->mg_conn;
3725 // Must be done before free()
3726 int keep_alive = should_keep_alive(&conn->mg_conn) &&
3727 (conn->endpoint_type == EP_FILE || conn->endpoint_type == EP_USER);
3728 DBG(("%p %d %d %d", conn, conn->endpoint_type, keep_alive, conn->flags));
3730 switch (conn->endpoint_type) {
3731 case EP_PUT: close(conn->endpoint.fd); break;
3732 case EP_FILE: close(conn->endpoint.fd); break;
3733 case EP_CGI: closesocket(conn->endpoint.cgi_sock); break;
3737 #ifndef MONGOOSE_NO_LOGGING
3738 if (c->status_code > 0 && conn->endpoint_type != EP_CLIENT &&
3739 c->status_code != 400) {
3740 log_access(conn, conn->server->config_options[ACCESS_LOG_FILE]);
3744 // Gobble possible POST data sent to the URI handler
3745 discard_leading_iobuf_bytes(&conn->local_iobuf, conn->mg_conn.content_len);
3746 conn->endpoint_type = EP_NONE;
3747 conn->cl = conn->num_bytes_sent = conn->request_len = conn->flags = 0;
3748 c->request_method = c->uri = c->http_version = c->query_string = NULL;
3749 c->num_headers = c->status_code = c->is_websocket = c->content_len = 0;
3750 free(conn->request);
3751 conn->request = NULL;
3754 process_request(conn); // Can call us recursively if pipelining is used
3756 conn->flags |= conn->remote_iobuf.len == 0 ? CONN_CLOSE : CONN_SPOOL_DONE;
3760 static void transfer_file_data(struct connection *conn) {
3761 char buf[IOBUF_SIZE];
3762 int n = read(conn->endpoint.fd, buf, conn->cl < (int64_t) sizeof(buf) ?
3763 (int) conn->cl : (int) sizeof(buf));
3766 close_local_endpoint(conn);
3769 spool(&conn->remote_iobuf, buf, n);
3770 if (conn->cl <= 0) {
3771 close_local_endpoint(conn);
3776 static void execute_iteration(struct mg_server *server) {
3777 struct ll *lp, *tmp;
3778 struct connection *conn;
3779 union { mg_handler_t f; void *p; } msg[2];
3781 recv(server->ctl[1], (void *) msg, sizeof(msg), 0);
3782 LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
3783 conn = LINKED_LIST_ENTRY(lp, struct connection, link);
3784 conn->mg_conn.connection_param = msg[1].p;
3785 msg[0].f(&conn->mg_conn);
3789 void add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) {
3791 if (sock > *max_fd) {
3796 unsigned int mg_poll_server(struct mg_server *server, int milliseconds) {
3797 struct ll *lp, *tmp;
3798 struct connection *conn;
3800 fd_set read_set, write_set;
3802 time_t current_time = time(NULL), expire_time = current_time -
3803 MONGOOSE_USE_IDLE_TIMEOUT_SECONDS;
3805 if (server->listening_sock == INVALID_SOCKET) return 0;
3808 FD_ZERO(&write_set);
3809 add_to_set(server->listening_sock, &read_set, &max_fd);
3810 add_to_set(server->ctl[1], &read_set, &max_fd);
3812 LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
3813 conn = LINKED_LIST_ENTRY(lp, struct connection, link);
3814 add_to_set(conn->client_sock, &read_set, &max_fd);
3815 if (conn->endpoint_type == EP_CLIENT && (conn->flags & CONN_CONNECTING)) {
3816 add_to_set(conn->client_sock, &write_set, &max_fd);
3818 if (conn->endpoint_type == EP_FILE) {
3819 transfer_file_data(conn);
3820 } else if (conn->endpoint_type == EP_CGI) {
3821 add_to_set(conn->endpoint.cgi_sock, &read_set, &max_fd);
3823 if (conn->remote_iobuf.len > 0 && !(conn->flags & CONN_BUFFER)) {
3824 add_to_set(conn->client_sock, &write_set, &max_fd);
3825 } else if (conn->flags & CONN_CLOSE) {
3830 tv.tv_sec = milliseconds / 1000;
3831 tv.tv_usec = (milliseconds % 1000) * 1000;
3833 if (select(max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) {
3834 if (FD_ISSET(server->ctl[1], &read_set)) {
3835 execute_iteration(server);
3838 // Accept new connections
3839 if (FD_ISSET(server->listening_sock, &read_set)) {
3840 while ((conn = accept_new_connection(server)) != NULL) {
3841 conn->birth_time = conn->last_activity_time = current_time;
3845 // Read/write from clients
3846 LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
3847 conn = LINKED_LIST_ENTRY(lp, struct connection, link);
3848 if (FD_ISSET(conn->client_sock, &read_set)) {
3849 conn->last_activity_time = current_time;
3850 read_from_socket(conn);
3852 #ifndef MONGOOSE_NO_CGI
3853 if (conn->endpoint_type == EP_CGI &&
3854 FD_ISSET(conn->endpoint.cgi_sock, &read_set)) {
3855 read_from_cgi(conn);
3858 if (FD_ISSET(conn->client_sock, &write_set)) {
3859 if (conn->endpoint_type == EP_CLIENT &&
3860 (conn->flags & CONN_CONNECTING)) {
3861 read_from_socket(conn);
3862 } else if (!(conn->flags & CONN_BUFFER)) {
3863 conn->last_activity_time = current_time;
3864 write_to_socket(conn);
3870 // Close expired connections and those that need to be closed
3871 LINKED_LIST_FOREACH(&server->active_connections, lp, tmp) {
3872 conn = LINKED_LIST_ENTRY(lp, struct connection, link);
3873 if (conn->mg_conn.is_websocket) {
3874 ping_idle_websocket_connection(conn, current_time);
3876 if (conn->flags & CONN_LONG_RUNNING) {
3877 conn->mg_conn.wsbits = conn->flags & CONN_CLOSE ? 1 : 0;
3878 if (call_request_handler(conn) == MG_REQUEST_PROCESSED) {
3879 conn->flags |= CONN_CLOSE;
3882 if (conn->flags & CONN_CLOSE || conn->last_activity_time < expire_time) {
3887 return (unsigned int) current_time;
3890 void mg_destroy_server(struct mg_server **server) {
3892 struct ll *lp, *tmp;
3894 if (server != NULL && *server != NULL) {
3895 struct mg_server *s = *server;
3896 // Do one last poll, see https://github.com/cesanta/mongoose/issues/286
3897 mg_poll_server(s, 0);
3898 closesocket(s->listening_sock);
3899 closesocket(s->ctl[0]);
3900 closesocket(s->ctl[1]);
3901 LINKED_LIST_FOREACH(&s->active_connections, lp, tmp) {
3902 close_conn(LINKED_LIST_ENTRY(lp, struct connection, link));
3904 for (i = 0; i < (int) ARRAY_SIZE(s->config_options); i++) {
3905 free(s->config_options[i]); // It is OK to free(NULL)
3907 #ifdef MONGOOSE_USE_SSL
3908 if (s->ssl_ctx != NULL) SSL_CTX_free((*server)->ssl_ctx);
3909 if (s->client_ssl_ctx != NULL) SSL_CTX_free(s->client_ssl_ctx);
3916 // Apply function to all active connections.
3917 void mg_iterate_over_connections(struct mg_server *server, mg_handler_t handler,
3919 // Send closure (function + parameter) to the IO thread to execute
3920 union { mg_handler_t f; void *p; } msg[2];
3923 send(server->ctl[0], (void *) msg, sizeof(msg), 0);
3926 static int get_var(const char *data, size_t data_len, const char *name,
3927 char *dst, size_t dst_len) {
3928 const char *p, *e, *s;
3932 if (dst == NULL || dst_len == 0) {
3934 } else if (data == NULL || name == NULL || data_len == 0) {
3938 name_len = strlen(name);
3939 e = data + data_len;
3943 // data is "var1=val1&var2=val2...". Find variable first
3944 for (p = data; p + name_len < e; p++) {
3945 if ((p == data || p[-1] == '&') && p[name_len] == '=' &&
3946 !mg_strncasecmp(name, p, name_len)) {
3948 // Point p to variable value
3951 // Point s to the end of the value
3952 s = (const char *) memchr(p, '&', (size_t)(e - p));
3958 // Decode variable into destination buffer
3959 len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
3961 // Redirect error code from -1 to -2 (destination buffer too small).
3973 int mg_get_var(const struct mg_connection *conn, const char *name,
3974 char *dst, size_t dst_len) {
3975 int len = get_var(conn->query_string, conn->query_string == NULL ? 0 :
3976 strlen(conn->query_string), name, dst, dst_len);
3978 len = get_var(conn->content, conn->content_len, name, dst, dst_len);
3983 static int get_line_len(const char *buf, int buf_len) {
3985 while (len < buf_len && buf[len] != '\n') len++;
3986 return buf[len] == '\n' ? len + 1: -1;
3989 int mg_parse_multipart(const char *buf, int buf_len,
3990 char *var_name, int var_name_len,
3991 char *file_name, int file_name_len,
3992 const char **data, int *data_len) {
3993 static const char cd[] = "Content-Disposition: ";
3994 //struct mg_connection c;
3995 int hl, bl, n, ll, pos, cdl = sizeof(cd) - 1;
3998 if (buf == NULL || buf_len <= 0) return 0;
3999 if ((hl = get_request_len(buf, buf_len)) <= 0) return 0;
4000 if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0;
4002 // Get boundary length
4003 bl = get_line_len(buf, buf_len);
4005 // Loop through headers, fetch variable name and file name
4006 var_name[0] = file_name[0] = '\0';
4007 for (n = bl; (ll = get_line_len(buf + n, hl - n)) > 0; n += ll) {
4008 if (mg_strncasecmp(cd, buf + n, cdl) == 0) {
4009 parse_header(buf + n + cdl, ll - (cdl + 2), "name",
4010 var_name, var_name_len);
4011 parse_header(buf + n + cdl, ll - (cdl + 2), "filename",
4012 file_name, file_name_len);
4016 // Scan body, search for terminating boundary
4017 for (pos = hl; pos + (bl - 2) < buf_len; pos++) {
4018 if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) {
4019 if (data_len != NULL) *data_len = (pos - 2) - hl;
4020 if (data != NULL) *data = buf + hl;
4028 const char **mg_get_valid_option_names(void) {
4029 return static_config_options;
4032 static int get_option_index(const char *name) {
4035 for (i = 0; static_config_options[i * 2] != NULL; i++) {
4036 if (strcmp(static_config_options[i * 2], name) == 0) {
4043 static void set_default_option_values(char **opts) {
4044 const char *value, **all_opts = mg_get_valid_option_names();
4047 for (i = 0; all_opts[i * 2] != NULL; i++) {
4048 value = all_opts[i * 2 + 1];
4049 if (opts[i] == NULL && value != NULL) {
4050 opts[i] = mg_strdup(value);
4055 // Valid listening port spec is: [ip_address:]port, e.g. "80", "127.0.0.1:3128"
4056 static int parse_port_string(const char *str, union socket_address *sa) {
4057 unsigned int a, b, c, d, port;
4059 #ifdef MONGOOSE_USE_IPV6
4063 // MacOS needs that. If we do not zero it, subsequent bind() will fail.
4064 // Also, all-zeroes in the socket address means binding to all addresses
4065 // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
4066 memset(sa, 0, sizeof(*sa));
4067 sa->sin.sin_family = AF_INET;
4069 if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
4070 // Bind to a specific IPv4 address, e.g. 192.168.1.5:8080
4071 sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
4072 sa->sin.sin_port = htons((uint16_t) port);
4073 #if defined(MONGOOSE_USE_IPV6)
4074 } else if (sscanf(str, "[%49[^]]]:%u%n", buf, &port, &len) == 2 &&
4075 inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) {
4076 // IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080
4077 sa->sin6.sin6_family = AF_INET6;
4078 sa->sin6.sin6_port = htons((uint16_t) port);
4080 } else if (sscanf(str, "%u%n", &port, &len) == 1) {
4081 // If only port is specified, bind to IPv4, INADDR_ANY
4082 sa->sin.sin_port = htons((uint16_t) port);
4084 port = 0; // Parsing failure. Make port invalid.
4087 return port <= 0xffff && str[len] == '\0';
4090 const char *mg_set_option(struct mg_server *server, const char *name,
4091 const char *value) {
4092 int ind = get_option_index(name);
4093 const char *error_msg = NULL;
4096 error_msg = "No such option";
4098 if (server->config_options[ind] != NULL) {
4099 free(server->config_options[ind]);
4101 server->config_options[ind] = mg_strdup(value);
4102 DBG(("%s [%s]", name, value));
4104 if (ind == LISTENING_PORT) {
4105 if (server->listening_sock != INVALID_SOCKET) {
4106 closesocket(server->listening_sock);
4108 parse_port_string(server->config_options[LISTENING_PORT], &server->lsa);
4109 server->listening_sock = open_listening_socket(&server->lsa);
4110 if (server->listening_sock == INVALID_SOCKET) {
4111 error_msg = "Cannot bind to port";
4113 sockaddr_to_string(server->local_ip, sizeof(server->local_ip),
4115 if (!strcmp(value, "0")) {
4117 mg_snprintf(buf, sizeof(buf), "%d",
4118 (int) ntohs(server->lsa.sin.sin_port));
4119 free(server->config_options[ind]);
4120 server->config_options[ind] = mg_strdup(buf);
4124 } else if (ind == RUN_AS_USER) {
4126 if ((pw = getpwnam(value)) == NULL) {
4127 error_msg = "Unknown user";
4128 } else if (setgid(pw->pw_gid) != 0) {
4129 error_msg = "setgid() failed";
4130 } else if (setuid(pw->pw_uid) != 0) {
4131 error_msg = "setuid() failed";
4134 #ifdef MONGOOSE_USE_SSL
4135 } else if (ind == SSL_CERTIFICATE) {
4136 //SSL_library_init();
4137 if ((server->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
4138 error_msg = "SSL_CTX_new() failed";
4139 } else if (SSL_CTX_use_certificate_file(server->ssl_ctx, value, 1) == 0 ||
4140 SSL_CTX_use_PrivateKey_file(server->ssl_ctx, value, 1) == 0) {
4141 error_msg = "Cannot load PEM file";
4143 SSL_CTX_use_certificate_chain_file(server->ssl_ctx, value);
4152 void mg_set_request_handler(struct mg_server *server, mg_handler_t handler) {
4153 server->request_handler = handler;
4156 void mg_set_http_error_handler(struct mg_server *server, mg_handler_t handler) {
4157 server->error_handler = handler;
4160 void mg_set_auth_handler(struct mg_server *server, mg_handler_t handler) {
4161 server->auth_handler = handler;
4164 void mg_set_listening_socket(struct mg_server *server, int sock) {
4165 if (server->listening_sock != INVALID_SOCKET) {
4166 closesocket(server->listening_sock);
4168 server->listening_sock = (sock_t) sock;
4171 int mg_get_listening_socket(struct mg_server *server) {
4172 return server->listening_sock;
4175 const char *mg_get_option(const struct mg_server *server, const char *name) {
4176 const char **opts = (const char **) server->config_options;
4177 int i = get_option_index(name);
4178 return i == -1 ? NULL : opts[i] == NULL ? "" : opts[i];
4181 struct mg_server *mg_create_server(void *server_data) {
4182 struct mg_server *server = (struct mg_server *) calloc(1, sizeof(*server));
4186 WSAStartup(MAKEWORD(2, 2), &data);
4188 // Ignore SIGPIPE signal, so if browser cancels the request, it
4189 // won't kill the whole process.
4190 signal(SIGPIPE, SIG_IGN);
4193 LINKED_LIST_INIT(&server->active_connections);
4195 // Create control socket pair. Do it in a loop to protect from
4196 // interrupted syscalls in mg_socketpair().
4198 mg_socketpair(server->ctl);
4199 } while (server->ctl[0] == INVALID_SOCKET);
4201 #ifdef MONGOOSE_USE_SSL
4203 server->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method());
4206 server->server_data = server_data;
4207 server->listening_sock = INVALID_SOCKET;
4208 set_default_option_values(server->config_options);