2 * HTTP protocol for ffmpeg client
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
27 #include "os_support.h"
30 #include "libavutil/opt.h"
36 /* XXX: POST protocol is not completely implemented because ffmpeg uses
37 only a subset of it. */
39 /* The IO buffer size is unrelated to the max URL size in itself, but needs
40 * to be large enough to fit the full request headers (including long
43 #define BUFFER_SIZE MAX_URL_SIZE
44 #define MAX_REDIRECTS 8
49 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
52 /* Used if "Transfer-Encoding: chunked" otherwise -1. */
54 int64_t off, end_off, filesize;
56 HTTPAuthState auth_state;
57 HTTPAuthState proxy_auth_state;
62 /* Set if the server correctly handles Connection: close and will close
63 * the connection after feeding us the content. */
65 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
67 /* A flag which indicates if the end of chunked encoding has been sent. */
69 /* A flag which indicates we have finished to read POST reply. */
71 /* A flag which indicates if we use persistent connections. */
72 int multiple_requests;
77 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
79 /* how much data was read since the last ICY metadata packet */
81 /* after how many bytes of read data a new metadata packet will be found */
83 char *icy_metadata_headers;
84 char *icy_metadata_packet;
87 z_stream inflate_stream;
88 uint8_t *inflate_buffer;
90 AVDictionary *chained_options;
94 #define OFFSET(x) offsetof(HTTPContext, x)
95 #define D AV_OPT_FLAG_DECODING_PARAM
96 #define E AV_OPT_FLAG_ENCODING_PARAM
97 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
98 static const AVOption options[] = {
99 {"seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, D },
100 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
101 {"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
102 {"content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
103 {"user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
104 {"user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D },
105 {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
106 {"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
107 {"mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
108 {"cookies", "set cookies to be sent in applicable future requests, use newline delimited Set-Cookie HTTP field value syntax", OFFSET(cookies), AV_OPT_TYPE_STRING, {0}, 0, 0, D },
109 {"icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
110 {"icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
111 {"icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
112 {"auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, {.i64 = HTTP_AUTH_NONE}, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D|E, "auth_type" },
113 {"none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_NONE}, 0, 0, D|E, "auth_type" },
114 {"basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_BASIC}, 0, 0, D|E, "auth_type" },
115 {"send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
116 {"location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
117 {"offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D },
118 {"end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D },
121 #define HTTP_CLASS(flavor)\
122 static const AVClass flavor ## _context_class = {\
123 .class_name = #flavor,\
124 .item_name = av_default_item_name,\
126 .version = LIBAVUTIL_VERSION_INT,\
132 static int http_connect(URLContext *h, const char *path, const char *local_path,
133 const char *hoststr, const char *auth,
134 const char *proxyauth, int *new_location);
136 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
138 memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
139 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
140 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
141 &((HTTPContext*)src->priv_data)->proxy_auth_state,
142 sizeof(HTTPAuthState));
145 /* return non zero if error */
146 static int http_open_cnx(URLContext *h, AVDictionary **options)
148 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
149 char hostname[1024], hoststr[1024], proto[10];
150 char auth[1024], proxyauth[1024] = "";
151 char path1[MAX_URL_SIZE];
152 char buf[1024], urlbuf[MAX_URL_SIZE];
153 int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0;
154 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
155 HTTPContext *s = h->priv_data;
157 /* fill the dest addr */
159 /* needed in any case to build the host string */
160 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
161 hostname, sizeof(hostname), &port,
162 path1, sizeof(path1), s->location);
163 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
165 proxy_path = getenv("http_proxy");
166 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
167 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);
169 if (!strcmp(proto, "https")) {
178 if (path1[0] == '\0')
184 /* Reassemble the request URL without auth string - we don't
185 * want to leak the auth to the proxy. */
186 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
189 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
190 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
193 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
196 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
197 &h->interrupt_callback, options);
202 cur_auth_type = s->auth_state.auth_type;
203 cur_proxy_auth_type = s->auth_state.auth_type;
204 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
207 if (s->http_code == 401) {
208 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
209 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
210 ffurl_closep(&s->hd);
215 if (s->http_code == 407) {
216 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
217 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
218 ffurl_closep(&s->hd);
223 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
224 && location_changed == 1) {
225 /* url moved, get next */
226 ffurl_closep(&s->hd);
227 if (redirects++ >= MAX_REDIRECTS)
229 /* Restart the authentication process with the new target, which
230 * might use a different auth mechanism. */
231 memset(&s->auth_state, 0, sizeof(s->auth_state));
233 location_changed = 0;
239 ffurl_closep(&s->hd);
243 int ff_http_do_new_request(URLContext *h, const char *uri)
245 HTTPContext *s = h->priv_data;
246 AVDictionary *options = NULL;
250 s->icy_data_read = 0;
251 av_free(s->location);
252 s->location = av_strdup(uri);
254 return AVERROR(ENOMEM);
256 av_dict_copy(&options, s->chained_options, 0);
257 ret = http_open_cnx(h, &options);
258 av_dict_free(&options);
262 static int http_open(URLContext *h, const char *uri, int flags,
263 AVDictionary **options)
265 HTTPContext *s = h->priv_data;
268 if( s->seekable == 1 )
274 s->location = av_strdup(uri);
276 return AVERROR(ENOMEM);
278 av_dict_copy(&s->chained_options, *options, 0);
281 int len = strlen(s->headers);
282 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
283 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
286 ret = http_open_cnx(h, options);
288 av_dict_free(&s->chained_options);
291 static int http_getc(HTTPContext *s)
294 if (s->buf_ptr >= s->buf_end) {
295 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
298 } else if (len == 0) {
301 s->buf_ptr = s->buffer;
302 s->buf_end = s->buffer + len;
305 return *s->buf_ptr++;
308 static int http_get_line(HTTPContext *s, char *line, int line_size)
320 if (q > line && q[-1] == '\r')
326 if ((q - line) < line_size - 1)
332 static int check_http_code(URLContext *h, int http_code, const char *end)
334 HTTPContext *s = h->priv_data;
335 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
336 * don't abort until all headers have been parsed. */
337 if (http_code >= 400 && http_code < 600 &&
338 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
339 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
340 end += strspn(end, SPACE_CHARS);
341 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
347 static int parse_location(HTTPContext *s, const char *p)
349 char redirected_location[MAX_URL_SIZE], *new_loc;
350 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
352 new_loc = av_strdup(redirected_location);
354 return AVERROR(ENOMEM);
355 av_free(s->location);
356 s->location = new_loc;
360 /* "bytes $from-$to/$document_size" */
361 static void parse_content_range(URLContext *h, const char *p)
363 HTTPContext *s = h->priv_data;
366 if (!strncmp(p, "bytes ", 6)) {
368 s->off = strtoll(p, NULL, 10);
369 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
370 s->filesize = strtoll(slash+1, NULL, 10);
372 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
373 h->is_streamed = 0; /* we _can_ in fact seek */
376 static int parse_content_encoding(URLContext *h, const char *p)
378 HTTPContext *s = h->priv_data;
380 if (!av_strncasecmp(p, "gzip", 4) ||
381 !av_strncasecmp(p, "deflate", 7)) {
384 inflateEnd(&s->inflate_stream);
385 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
386 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
387 s->inflate_stream.msg);
388 return AVERROR(ENOSYS);
390 if (zlibCompileFlags() & (1 << 17)) {
391 av_log(h, AV_LOG_WARNING,
392 "Your zlib was compiled without gzip support.\n");
393 return AVERROR(ENOSYS);
396 av_log(h, AV_LOG_WARNING,
397 "Compressed (%s) content, need zlib with gzip support\n", p);
398 return AVERROR(ENOSYS);
400 } else if (!av_strncasecmp(p, "identity", 8)) {
401 // The normal, no-encoding case (although servers shouldn't include
402 // the header at all if this is the case).
404 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
409 // Concat all Icy- header lines
410 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
412 int len = 4 + strlen(p) + strlen(tag);
413 int is_first = !s->icy_metadata_headers;
416 if (s->icy_metadata_headers)
417 len += strlen(s->icy_metadata_headers);
419 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
423 *s->icy_metadata_headers = '\0';
425 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
430 static int process_line(URLContext *h, char *line, int line_count,
433 HTTPContext *s = h->priv_data;
438 if (line[0] == '\0') {
444 if (line_count == 0) {
445 while (!av_isspace(*p) && *p != '\0')
447 while (av_isspace(*p))
449 s->http_code = strtol(p, &end, 10);
451 av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code);
453 if ((ret = check_http_code(h, s->http_code, end)) < 0)
456 while (*p != '\0' && *p != ':')
464 while (av_isspace(*p))
466 if (!av_strcasecmp(tag, "Location")) {
467 if ((ret = parse_location(s, p)) < 0)
470 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
471 s->filesize = strtoll(p, NULL, 10);
472 } else if (!av_strcasecmp(tag, "Content-Range")) {
473 parse_content_range(h, p);
474 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
475 !strncmp(p, "bytes", 5) &&
478 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
479 !av_strncasecmp(p, "chunked", 7)) {
482 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
483 ff_http_auth_handle_header(&s->auth_state, tag, p);
484 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
485 ff_http_auth_handle_header(&s->auth_state, tag, p);
486 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
487 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
488 } else if (!av_strcasecmp(tag, "Connection")) {
489 if (!strcmp(p, "close"))
491 } else if (!av_strcasecmp (tag, "Server")) {
492 if (!av_strcasecmp (p, "AkamaiGHost")) {
494 } else if (!av_strncasecmp (p, "MediaGateway", 12)) {
495 s->is_mediagateway = 1;
497 } else if (!av_strcasecmp (tag, "Content-Type")) {
498 av_free(s->mime_type);
499 s->mime_type = av_strdup(p);
500 } else if (!av_strcasecmp (tag, "Set-Cookie")) {
502 if (!(s->cookies = av_strdup(p)))
503 return AVERROR(ENOMEM);
505 char *tmp = s->cookies;
506 size_t str_size = strlen(tmp) + strlen(p) + 2;
507 if (!(s->cookies = av_malloc(str_size))) {
509 return AVERROR(ENOMEM);
511 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
514 } else if (!av_strcasecmp (tag, "Icy-MetaInt")) {
515 s->icy_metaint = strtoll(p, NULL, 10);
516 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
517 if ((ret = parse_icy(s, tag, p)) < 0)
519 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
520 if ((ret = parse_content_encoding(h, p)) < 0)
528 * Create a string containing cookie values for use as a HTTP cookie header
529 * field value for a particular path and domain from the cookie values stored in
530 * the HTTP protocol context. The cookie string is stored in *cookies.
532 * @return a negative value if an error condition occurred, 0 otherwise
534 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
537 // cookie strings will look like Set-Cookie header field values. Multiple
538 // Set-Cookie fields will result in multiple values delimited by a newline
540 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
542 if (!set_cookies) return AVERROR(EINVAL);
545 while ((cookie = av_strtok(set_cookies, "\n", &next))) {
546 int domain_offset = 0;
547 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
550 while ((param = av_strtok(cookie, "; ", &next_param))) {
552 if (!av_strncasecmp("path=", param, 5)) {
554 cpath = av_strdup(¶m[5]);
555 } else if (!av_strncasecmp("domain=", param, 7)) {
556 // if the cookie specifies a sub-domain, skip the leading dot thereby
557 // supporting URLs that point to sub-domains and the master domain
558 int leading_dot = (param[7] == '.');
560 cdomain = av_strdup(¶m[7+leading_dot]);
561 } else if (!av_strncasecmp("secure", param, 6) ||
562 !av_strncasecmp("comment", param, 7) ||
563 !av_strncasecmp("max-age", param, 7) ||
564 !av_strncasecmp("version", param, 7)) {
565 // ignore Comment, Max-Age, Secure and Version
568 cvalue = av_strdup(param);
572 cdomain = av_strdup(domain);
574 // ensure all of the necessary values are valid
575 if (!cdomain || !cpath || !cvalue) {
576 av_log(s, AV_LOG_WARNING,
577 "Invalid cookie found, no value, path or domain specified\n");
581 // check if the request path matches the cookie path
582 if (av_strncasecmp(path, cpath, strlen(cpath)))
585 // the domain should be at least the size of our cookie domain
586 domain_offset = strlen(domain) - strlen(cdomain);
587 if (domain_offset < 0)
590 // match the cookie domain
591 if (av_strcasecmp(&domain[domain_offset], cdomain))
594 // cookie parameters match, so copy the value
596 if (!(*cookies = av_strdup(cvalue))) {
597 ret = AVERROR(ENOMEM);
601 char *tmp = *cookies;
602 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
603 if (!(*cookies = av_malloc(str_size))) {
604 ret = AVERROR(ENOMEM);
607 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
616 if (*cookies) av_freep(cookies);
617 av_free(cset_cookies);
622 av_free(cset_cookies);
627 static inline int has_header(const char *str, const char *header)
629 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
632 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
635 static int http_read_header(URLContext *h, int *new_location)
637 HTTPContext *s = h->priv_data;
638 char line[MAX_URL_SIZE];
644 if ((err = http_get_line(s, line, sizeof(line))) < 0)
647 av_log(h, AV_LOG_DEBUG, "header='%s'\n", line);
649 err = process_line(h, line, s->line_count, new_location);
657 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
658 h->is_streamed = 1; /* we can in fact _not_ seek */
663 static int http_connect(URLContext *h, const char *path, const char *local_path,
664 const char *hoststr, const char *auth,
665 const char *proxyauth, int *new_location)
667 HTTPContext *s = h->priv_data;
669 char headers[4096] = "";
670 char *authstr = NULL, *proxyauthstr = NULL;
671 int64_t off = s->off;
674 int send_expect_100 = 0;
677 /* send http header */
678 post = h->flags & AVIO_FLAG_WRITE;
681 /* force POST method and disable chunked encoding when
682 * custom HTTP post data is set */
687 method = post ? "POST" : "GET";
688 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
690 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
692 if (post && !s->post_data) {
693 send_expect_100 = s->send_expect_100;
694 /* The user has supplied authentication but we don't know the auth type,
695 * send Expect: 100-continue to get the 401 response including the
696 * WWW-Authenticate header, or an 100 continue if no auth actually
699 s->auth_state.auth_type == HTTP_AUTH_NONE &&
704 /* set default headers if needed */
705 if (!has_header(s->headers, "\r\nUser-Agent: "))
706 len += av_strlcatf(headers + len, sizeof(headers) - len,
707 "User-Agent: %s\r\n", s->user_agent);
708 if (!has_header(s->headers, "\r\nAccept: "))
709 len += av_strlcpy(headers + len, "Accept: */*\r\n",
710 sizeof(headers) - len);
711 // Note: we send this on purpose even when s->off is 0 when we're probing,
712 // since it allows us to detect more reliably if a (non-conforming)
713 // server supports seeking by analysing the reply headers.
714 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
715 len += av_strlcatf(headers + len, sizeof(headers) - len,
716 "Range: bytes=%"PRId64"-", s->off);
718 len += av_strlcatf(headers + len, sizeof(headers) - len,
719 "%"PRId64, s->end_off - 1);
720 len += av_strlcpy(headers + len, "\r\n",
721 sizeof(headers) - len);
723 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
724 len += av_strlcatf(headers + len, sizeof(headers) - len,
725 "Expect: 100-continue\r\n");
727 if (!has_header(s->headers, "\r\nConnection: ")) {
728 if (s->multiple_requests) {
729 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
730 sizeof(headers) - len);
732 len += av_strlcpy(headers + len, "Connection: close\r\n",
733 sizeof(headers) - len);
737 if (!has_header(s->headers, "\r\nHost: "))
738 len += av_strlcatf(headers + len, sizeof(headers) - len,
739 "Host: %s\r\n", hoststr);
740 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
741 len += av_strlcatf(headers + len, sizeof(headers) - len,
742 "Content-Length: %d\r\n", s->post_datalen);
744 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
745 len += av_strlcatf(headers + len, sizeof(headers) - len,
746 "Content-Type: %s\r\n", s->content_type);
747 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
748 char *cookies = NULL;
749 if (!get_cookies(s, &cookies, path, hoststr)) {
750 len += av_strlcatf(headers + len, sizeof(headers) - len,
751 "Cookie: %s\r\n", cookies);
755 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy) {
756 len += av_strlcatf(headers + len, sizeof(headers) - len,
757 "Icy-MetaData: %d\r\n", 1);
760 /* now add in custom headers */
762 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
764 snprintf(s->buffer, sizeof(s->buffer),
773 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
775 authstr ? authstr : "",
776 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
779 av_freep(&proxyauthstr);
781 av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
783 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
787 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
790 /* init input buffer */
791 s->buf_ptr = s->buffer;
792 s->buf_end = s->buffer;
795 s->icy_data_read = 0;
798 s->end_chunked_post = 0;
800 if (post && !s->post_data && !send_expect_100) {
801 /* Pretend that it did work. We didn't read any header yet, since
802 * we've still to send the POST data, but the code calling this
803 * function will check http_code after we return. */
808 /* wait for header */
809 err = http_read_header(h, new_location);
813 return (off == s->off) ? 0 : -1;
817 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
819 HTTPContext *s = h->priv_data;
821 /* read bytes from input buffer first */
822 len = s->buf_end - s->buf_ptr;
826 memcpy(buf, s->buf_ptr, len);
829 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
831 len = ffurl_read(s->hd, buf, size);
835 if (s->chunksize > 0)
842 #define DECOMPRESS_BUF_SIZE (256 * 1024)
843 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
845 HTTPContext *s = h->priv_data;
848 if (!s->inflate_buffer) {
849 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
850 if (!s->inflate_buffer)
851 return AVERROR(ENOMEM);
854 if (s->inflate_stream.avail_in == 0) {
855 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
858 s->inflate_stream.next_in = s->inflate_buffer;
859 s->inflate_stream.avail_in = read;
862 s->inflate_stream.avail_out = size;
863 s->inflate_stream.next_out = buf;
865 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
866 if (ret != Z_OK && ret != Z_STREAM_END)
867 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", ret, s->inflate_stream.msg);
869 return size - s->inflate_stream.avail_out;
873 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
875 HTTPContext *s = h->priv_data;
876 int err, new_location;
881 if (s->end_chunked_post && !s->end_header) {
882 err = http_read_header(h, &new_location);
887 if (s->chunksize >= 0) {
893 if ((err = http_get_line(s, line, sizeof(line))) < 0)
895 } while (!*line); /* skip CR LF from last chunk */
897 s->chunksize = strtoll(line, NULL, 16);
899 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
906 size = FFMIN(size, s->chunksize);
910 return http_buf_read_compressed(h, buf, size);
912 return http_buf_read(h, buf, size);
915 // Like http_read_stream(), but no short reads.
916 // Assumes partial reads are an error.
917 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
921 int len = http_read_stream(h, buf + pos, size - pos);
929 static int store_icy(URLContext *h, int size)
931 HTTPContext *s = h->priv_data;
932 /* until next metadata packet */
933 int remaining = s->icy_metaint - s->icy_data_read;
936 return AVERROR_INVALIDDATA;
939 // The metadata packet is variable sized. It has a 1 byte header
940 // which sets the length of the packet (divided by 16). If it's 0,
941 // the metadata doesn't change. After the packet, icy_metaint bytes
942 // of normal data follow.
944 int len = http_read_stream_all(h, &ch, 1);
948 char data[255 * 16 + 1];
951 ret = http_read_stream_all(h, data, len);
955 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
958 s->icy_data_read = 0;
959 remaining = s->icy_metaint;
962 return FFMIN(size, remaining);
965 static int http_read(URLContext *h, uint8_t *buf, int size)
967 HTTPContext *s = h->priv_data;
969 if (s->icy_metaint > 0) {
970 size = store_icy(h, size);
975 size = http_read_stream(h, buf, size);
977 s->icy_data_read += size;
981 /* used only when posting data */
982 static int http_write(URLContext *h, const uint8_t *buf, int size)
984 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
986 char crlf[] = "\r\n";
987 HTTPContext *s = h->priv_data;
989 if (!s->chunked_post) {
990 /* non-chunked data is sent without any special encoding */
991 return ffurl_write(s->hd, buf, size);
994 /* silently ignore zero-size data since chunk encoding that would
997 /* upload data using chunked encoding */
998 snprintf(temp, sizeof(temp), "%x\r\n", size);
1000 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1001 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1002 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1008 static int http_shutdown(URLContext *h, int flags)
1011 char footer[] = "0\r\n\r\n";
1012 HTTPContext *s = h->priv_data;
1014 /* signal end of chunked encoding if used */
1015 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1016 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1017 ret = ret > 0 ? 0 : ret;
1018 s->end_chunked_post = 1;
1024 static int http_close(URLContext *h)
1027 HTTPContext *s = h->priv_data;
1030 inflateEnd(&s->inflate_stream);
1031 av_freep(&s->inflate_buffer);
1034 if (!s->end_chunked_post) {
1035 /* Close the write direction by sending the end of chunked encoding. */
1036 ret = http_shutdown(h, h->flags);
1040 ffurl_closep(&s->hd);
1041 av_dict_free(&s->chained_options);
1045 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1047 HTTPContext *s = h->priv_data;
1048 URLContext *old_hd = s->hd;
1049 int64_t old_off = s->off;
1050 uint8_t old_buf[BUFFER_SIZE];
1051 int old_buf_size, ret;
1052 AVDictionary *options = NULL;
1054 if (whence == AVSEEK_SIZE)
1056 else if ((whence == SEEK_CUR && off == 0) ||
1057 (whence == SEEK_SET && off == s->off))
1059 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1060 return AVERROR(ENOSYS);
1062 if (whence == SEEK_CUR)
1064 else if (whence == SEEK_END)
1066 else if (whence != SEEK_SET)
1067 return AVERROR(EINVAL);
1069 return AVERROR(EINVAL);
1072 /* we save the old context in case the seek fails */
1073 old_buf_size = s->buf_end - s->buf_ptr;
1074 memcpy(old_buf, s->buf_ptr, old_buf_size);
1077 /* if it fails, continue on old connection */
1078 av_dict_copy(&options, s->chained_options, 0);
1079 if ((ret = http_open_cnx(h, &options)) < 0) {
1080 av_dict_free(&options);
1081 memcpy(s->buffer, old_buf, old_buf_size);
1082 s->buf_ptr = s->buffer;
1083 s->buf_end = s->buffer + old_buf_size;
1088 av_dict_free(&options);
1089 ffurl_close(old_hd);
1094 http_get_file_handle(URLContext *h)
1096 HTTPContext *s = h->priv_data;
1097 return ffurl_get_file_handle(s->hd);
1100 #if CONFIG_HTTP_PROTOCOL
1101 URLProtocol ff_http_protocol = {
1103 .url_open2 = http_open,
1104 .url_read = http_read,
1105 .url_write = http_write,
1106 .url_seek = http_seek,
1107 .url_close = http_close,
1108 .url_get_file_handle = http_get_file_handle,
1109 .url_shutdown = http_shutdown,
1110 .priv_data_size = sizeof(HTTPContext),
1111 .priv_data_class = &http_context_class,
1112 .flags = URL_PROTOCOL_FLAG_NETWORK,
1115 #if CONFIG_HTTPS_PROTOCOL
1116 URLProtocol ff_https_protocol = {
1118 .url_open2 = http_open,
1119 .url_read = http_read,
1120 .url_write = http_write,
1121 .url_seek = http_seek,
1122 .url_close = http_close,
1123 .url_get_file_handle = http_get_file_handle,
1124 .url_shutdown = http_shutdown,
1125 .priv_data_size = sizeof(HTTPContext),
1126 .priv_data_class = &https_context_class,
1127 .flags = URL_PROTOCOL_FLAG_NETWORK,
1131 #if CONFIG_HTTPPROXY_PROTOCOL
1132 static int http_proxy_close(URLContext *h)
1134 HTTPContext *s = h->priv_data;
1136 ffurl_closep(&s->hd);
1140 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1142 HTTPContext *s = h->priv_data;
1143 char hostname[1024], hoststr[1024];
1144 char auth[1024], pathbuf[1024], *path;
1145 char lower_url[100];
1146 int port, ret = 0, attempts = 0;
1147 HTTPAuthType cur_auth_type;
1151 if( s->seekable == 1 )
1156 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1157 pathbuf, sizeof(pathbuf), uri);
1158 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1163 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1166 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1167 &h->interrupt_callback, NULL);
1171 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1173 snprintf(s->buffer, sizeof(s->buffer),
1174 "CONNECT %s HTTP/1.1\r\n"
1176 "Connection: close\r\n"
1181 authstr ? "Proxy-" : "", authstr ? authstr : "");
1184 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1187 s->buf_ptr = s->buffer;
1188 s->buf_end = s->buffer;
1191 cur_auth_type = s->proxy_auth_state.auth_type;
1193 /* Note: This uses buffering, potentially reading more than the
1194 * HTTP header. If tunneling a protocol where the server starts
1195 * the conversation, we might buffer part of that here, too.
1196 * Reading that requires using the proper ffurl_read() function
1197 * on this URLContext, not using the fd directly (as the tls
1198 * protocol does). This shouldn't be an issue for tls though,
1199 * since the client starts the conversation there, so there
1200 * is no extra data that we might buffer up here.
1202 ret = http_read_header(h, &new_loc);
1207 if (s->http_code == 407 &&
1208 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1209 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1210 ffurl_closep(&s->hd);
1214 if (s->http_code < 400)
1219 http_proxy_close(h);
1223 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1225 HTTPContext *s = h->priv_data;
1226 return ffurl_write(s->hd, buf, size);
1229 URLProtocol ff_httpproxy_protocol = {
1230 .name = "httpproxy",
1231 .url_open = http_proxy_open,
1232 .url_read = http_buf_read,
1233 .url_write = http_proxy_write,
1234 .url_close = http_proxy_close,
1235 .url_get_file_handle = http_get_file_handle,
1236 .priv_data_size = sizeof(HTTPContext),
1237 .flags = URL_PROTOCOL_FLAG_NETWORK,