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
26 #endif /* CONFIG_ZLIB */
28 #include "libavutil/avstring.h"
29 #include "libavutil/opt.h"
36 #include "os_support.h"
39 /* XXX: POST protocol is not completely implemented because ffmpeg uses
40 * only a subset of it. */
42 /* The IO buffer size is unrelated to the max URL size in itself, but needs
43 * to be large enough to fit the full request headers (including long
45 #define BUFFER_SIZE MAX_URL_SIZE
46 #define MAX_REDIRECTS 8
51 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
54 /* Used if "Transfer-Encoding: chunked" otherwise -1. */
56 int64_t off, end_off, filesize;
58 HTTPAuthState auth_state;
59 HTTPAuthState proxy_auth_state;
64 /* Set if the server correctly handles Connection: close and will close
65 * the connection after feeding us the content. */
67 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
69 /* A flag which indicates if the end of chunked encoding has been sent. */
71 /* A flag which indicates we have finished to read POST reply. */
73 /* A flag which indicates if we use persistent connections. */
74 int multiple_requests;
79 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
81 /* how much data was read since the last ICY metadata packet */
83 /* after how many bytes of read data a new metadata packet will be found */
85 char *icy_metadata_headers;
86 char *icy_metadata_packet;
89 z_stream inflate_stream;
90 uint8_t *inflate_buffer;
91 #endif /* CONFIG_ZLIB */
92 AVDictionary *chained_options;
97 #define OFFSET(x) offsetof(HTTPContext, x)
98 #define D AV_OPT_FLAG_DECODING_PARAM
99 #define E AV_OPT_FLAG_ENCODING_PARAM
100 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
102 static const AVOption options[] = {
103 { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D },
104 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
105 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
106 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
107 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
108 { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
109 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
110 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
111 { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
112 { "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 },
113 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D },
114 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
115 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
116 { "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"},
117 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
118 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
119 { "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 },
120 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
121 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
122 { "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 },
123 { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
127 static int http_connect(URLContext *h, const char *path, const char *local_path,
128 const char *hoststr, const char *auth,
129 const char *proxyauth, int *new_location);
131 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
133 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
134 &((HTTPContext *)src->priv_data)->auth_state,
135 sizeof(HTTPAuthState));
136 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
137 &((HTTPContext *)src->priv_data)->proxy_auth_state,
138 sizeof(HTTPAuthState));
141 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
143 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
144 char hostname[1024], hoststr[1024], proto[10];
145 char auth[1024], proxyauth[1024] = "";
146 char path1[MAX_URL_SIZE];
147 char buf[1024], urlbuf[MAX_URL_SIZE];
148 int port, use_proxy, err, location_changed = 0;
149 HTTPContext *s = h->priv_data;
151 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
152 hostname, sizeof(hostname), &port,
153 path1, sizeof(path1), s->location);
154 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
156 proxy_path = getenv("http_proxy");
157 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
158 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);
160 if (!strcmp(proto, "https")) {
169 if (path1[0] == '\0')
175 /* Reassemble the request URL without auth string - we don't
176 * want to leak the auth to the proxy. */
177 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
180 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
181 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
184 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
187 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
188 &h->interrupt_callback, options);
193 err = http_connect(h, path, local_path, hoststr,
194 auth, proxyauth, &location_changed);
198 return location_changed;
201 /* return non zero if error */
202 static int http_open_cnx(URLContext *h, AVDictionary **options)
204 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
205 HTTPContext *s = h->priv_data;
206 int location_changed, attempts = 0, redirects = 0;
208 location_changed = http_open_cnx_internal(h, options);
209 if (location_changed < 0)
213 cur_auth_type = s->auth_state.auth_type;
214 cur_proxy_auth_type = s->auth_state.auth_type;
216 if (s->http_code == 401) {
217 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
218 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
219 ffurl_closep(&s->hd);
224 if (s->http_code == 407) {
225 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
226 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
227 ffurl_closep(&s->hd);
232 if ((s->http_code == 301 || s->http_code == 302 ||
233 s->http_code == 303 || s->http_code == 307) &&
234 location_changed == 1) {
235 /* url moved, get next */
236 ffurl_closep(&s->hd);
237 if (redirects++ >= MAX_REDIRECTS)
239 /* Restart the authentication process with the new target, which
240 * might use a different auth mechanism. */
241 memset(&s->auth_state, 0, sizeof(s->auth_state));
243 location_changed = 0;
250 ffurl_closep(&s->hd);
254 int ff_http_do_new_request(URLContext *h, const char *uri)
256 HTTPContext *s = h->priv_data;
257 AVDictionary *options = NULL;
261 s->icy_data_read = 0;
262 av_free(s->location);
263 s->location = av_strdup(uri);
265 return AVERROR(ENOMEM);
267 av_dict_copy(&options, s->chained_options, 0);
268 ret = http_open_cnx(h, &options);
269 av_dict_free(&options);
273 static int http_open(URLContext *h, const char *uri, int flags,
274 AVDictionary **options)
276 HTTPContext *s = h->priv_data;
279 if( s->seekable == 1 )
285 s->location = av_strdup(uri);
287 return AVERROR(ENOMEM);
289 av_dict_copy(&s->chained_options, *options, 0);
292 int len = strlen(s->headers);
293 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
294 av_log(h, AV_LOG_WARNING,
295 "No trailing CRLF found in HTTP header.\n");
298 ret = http_open_cnx(h, options);
300 av_dict_free(&s->chained_options);
304 static int http_getc(HTTPContext *s)
307 if (s->buf_ptr >= s->buf_end) {
308 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
311 } else if (len == 0) {
314 s->buf_ptr = s->buffer;
315 s->buf_end = s->buffer + len;
318 return *s->buf_ptr++;
321 static int http_get_line(HTTPContext *s, char *line, int line_size)
333 if (q > line && q[-1] == '\r')
339 if ((q - line) < line_size - 1)
345 static int check_http_code(URLContext *h, int http_code, const char *end)
347 HTTPContext *s = h->priv_data;
348 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
349 * don't abort until all headers have been parsed. */
350 if (http_code >= 400 && http_code < 600 &&
351 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
352 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
353 end += strspn(end, SPACE_CHARS);
354 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
360 static int parse_location(HTTPContext *s, const char *p)
362 char redirected_location[MAX_URL_SIZE], *new_loc;
363 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
365 new_loc = av_strdup(redirected_location);
367 return AVERROR(ENOMEM);
368 av_free(s->location);
369 s->location = new_loc;
373 /* "bytes $from-$to/$document_size" */
374 static void parse_content_range(URLContext *h, const char *p)
376 HTTPContext *s = h->priv_data;
379 if (!strncmp(p, "bytes ", 6)) {
381 s->off = strtoll(p, NULL, 10);
382 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
383 s->filesize = strtoll(slash + 1, NULL, 10);
385 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
386 h->is_streamed = 0; /* we _can_ in fact seek */
389 static int parse_content_encoding(URLContext *h, const char *p)
391 HTTPContext *s = h->priv_data;
393 if (!av_strncasecmp(p, "gzip", 4) ||
394 !av_strncasecmp(p, "deflate", 7)) {
397 inflateEnd(&s->inflate_stream);
398 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
399 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
400 s->inflate_stream.msg);
401 return AVERROR(ENOSYS);
403 if (zlibCompileFlags() & (1 << 17)) {
404 av_log(h, AV_LOG_WARNING,
405 "Your zlib was compiled without gzip support.\n");
406 return AVERROR(ENOSYS);
409 av_log(h, AV_LOG_WARNING,
410 "Compressed (%s) content, need zlib with gzip support\n", p);
411 return AVERROR(ENOSYS);
412 #endif /* CONFIG_ZLIB */
413 } else if (!av_strncasecmp(p, "identity", 8)) {
414 // The normal, no-encoding case (although servers shouldn't include
415 // the header at all if this is the case).
417 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
422 // Concat all Icy- header lines
423 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
425 int len = 4 + strlen(p) + strlen(tag);
426 int is_first = !s->icy_metadata_headers;
429 if (s->icy_metadata_headers)
430 len += strlen(s->icy_metadata_headers);
432 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
436 *s->icy_metadata_headers = '\0';
438 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
443 static int process_line(URLContext *h, char *line, int line_count,
446 HTTPContext *s = h->priv_data;
451 if (line[0] == '\0') {
457 if (line_count == 0) {
458 while (!av_isspace(*p) && *p != '\0')
460 while (av_isspace(*p))
462 s->http_code = strtol(p, &end, 10);
464 av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code);
466 if ((ret = check_http_code(h, s->http_code, end)) < 0)
469 while (*p != '\0' && *p != ':')
477 while (av_isspace(*p))
479 if (!av_strcasecmp(tag, "Location")) {
480 if ((ret = parse_location(s, p)) < 0)
483 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
484 s->filesize = strtoll(p, NULL, 10);
485 } else if (!av_strcasecmp(tag, "Content-Range")) {
486 parse_content_range(h, p);
487 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
488 !strncmp(p, "bytes", 5) &&
491 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
492 !av_strncasecmp(p, "chunked", 7)) {
495 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
496 ff_http_auth_handle_header(&s->auth_state, tag, p);
497 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
498 ff_http_auth_handle_header(&s->auth_state, tag, p);
499 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
500 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
501 } else if (!av_strcasecmp(tag, "Connection")) {
502 if (!strcmp(p, "close"))
504 } else if (!av_strcasecmp(tag, "Server")) {
505 if (!av_strcasecmp(p, "AkamaiGHost")) {
507 } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
508 s->is_mediagateway = 1;
510 } else if (!av_strcasecmp(tag, "Content-Type")) {
511 av_free(s->mime_type);
512 s->mime_type = av_strdup(p);
513 } else if (!av_strcasecmp(tag, "Set-Cookie")) {
515 if (!(s->cookies = av_strdup(p)))
516 return AVERROR(ENOMEM);
518 char *tmp = s->cookies;
519 size_t str_size = strlen(tmp) + strlen(p) + 2;
520 if (!(s->cookies = av_malloc(str_size))) {
522 return AVERROR(ENOMEM);
524 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
527 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
528 s->icy_metaint = strtoll(p, NULL, 10);
529 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
530 if ((ret = parse_icy(s, tag, p)) < 0)
532 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
533 if ((ret = parse_content_encoding(h, p)) < 0)
541 * Create a string containing cookie values for use as a HTTP cookie header
542 * field value for a particular path and domain from the cookie values stored in
543 * the HTTP protocol context. The cookie string is stored in *cookies.
545 * @return a negative value if an error condition occurred, 0 otherwise
547 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
550 // cookie strings will look like Set-Cookie header field values. Multiple
551 // Set-Cookie fields will result in multiple values delimited by a newline
553 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
555 if (!set_cookies) return AVERROR(EINVAL);
558 while ((cookie = av_strtok(set_cookies, "\n", &next))) {
559 int domain_offset = 0;
560 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
563 while ((param = av_strtok(cookie, "; ", &next_param))) {
565 if (!av_strncasecmp("path=", param, 5)) {
567 cpath = av_strdup(¶m[5]);
568 } else if (!av_strncasecmp("domain=", param, 7)) {
569 // if the cookie specifies a sub-domain, skip the leading dot thereby
570 // supporting URLs that point to sub-domains and the master domain
571 int leading_dot = (param[7] == '.');
573 cdomain = av_strdup(¶m[7+leading_dot]);
574 } else if (!av_strncasecmp("secure", param, 6) ||
575 !av_strncasecmp("comment", param, 7) ||
576 !av_strncasecmp("max-age", param, 7) ||
577 !av_strncasecmp("version", param, 7)) {
578 // ignore Comment, Max-Age, Secure and Version
581 cvalue = av_strdup(param);
585 cdomain = av_strdup(domain);
587 // ensure all of the necessary values are valid
588 if (!cdomain || !cpath || !cvalue) {
589 av_log(s, AV_LOG_WARNING,
590 "Invalid cookie found, no value, path or domain specified\n");
594 // check if the request path matches the cookie path
595 if (av_strncasecmp(path, cpath, strlen(cpath)))
598 // the domain should be at least the size of our cookie domain
599 domain_offset = strlen(domain) - strlen(cdomain);
600 if (domain_offset < 0)
603 // match the cookie domain
604 if (av_strcasecmp(&domain[domain_offset], cdomain))
607 // cookie parameters match, so copy the value
609 if (!(*cookies = av_strdup(cvalue))) {
610 ret = AVERROR(ENOMEM);
614 char *tmp = *cookies;
615 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
616 if (!(*cookies = av_malloc(str_size))) {
617 ret = AVERROR(ENOMEM);
620 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
629 if (*cookies) av_freep(cookies);
630 av_free(cset_cookies);
635 av_free(cset_cookies);
640 static inline int has_header(const char *str, const char *header)
642 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
645 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
648 static int http_read_header(URLContext *h, int *new_location)
650 HTTPContext *s = h->priv_data;
651 char line[MAX_URL_SIZE];
657 if ((err = http_get_line(s, line, sizeof(line))) < 0)
660 av_log(h, AV_LOG_DEBUG, "header='%s'\n", line);
662 err = process_line(h, line, s->line_count, new_location);
670 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
671 h->is_streamed = 1; /* we can in fact _not_ seek */
676 static int http_connect(URLContext *h, const char *path, const char *local_path,
677 const char *hoststr, const char *auth,
678 const char *proxyauth, int *new_location)
680 HTTPContext *s = h->priv_data;
682 char headers[HTTP_HEADERS_SIZE] = "";
683 char *authstr = NULL, *proxyauthstr = NULL;
684 int64_t off = s->off;
687 int send_expect_100 = 0;
689 /* send http header */
690 post = h->flags & AVIO_FLAG_WRITE;
693 /* force POST method and disable chunked encoding when
694 * custom HTTP post data is set */
702 method = post ? "POST" : "GET";
704 authstr = ff_http_auth_create_response(&s->auth_state, auth,
706 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
708 if (post && !s->post_data) {
709 send_expect_100 = s->send_expect_100;
710 /* The user has supplied authentication but we don't know the auth type,
711 * send Expect: 100-continue to get the 401 response including the
712 * WWW-Authenticate header, or an 100 continue if no auth actually
715 s->auth_state.auth_type == HTTP_AUTH_NONE &&
720 /* set default headers if needed */
721 if (!has_header(s->headers, "\r\nUser-Agent: "))
722 len += av_strlcatf(headers + len, sizeof(headers) - len,
723 "User-Agent: %s\r\n", s->user_agent);
724 if (!has_header(s->headers, "\r\nAccept: "))
725 len += av_strlcpy(headers + len, "Accept: */*\r\n",
726 sizeof(headers) - len);
727 // Note: we send this on purpose even when s->off is 0 when we're probing,
728 // since it allows us to detect more reliably if a (non-conforming)
729 // server supports seeking by analysing the reply headers.
730 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
731 len += av_strlcatf(headers + len, sizeof(headers) - len,
732 "Range: bytes=%"PRId64"-", s->off);
734 len += av_strlcatf(headers + len, sizeof(headers) - len,
735 "%"PRId64, s->end_off - 1);
736 len += av_strlcpy(headers + len, "\r\n",
737 sizeof(headers) - len);
739 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
740 len += av_strlcatf(headers + len, sizeof(headers) - len,
741 "Expect: 100-continue\r\n");
743 if (!has_header(s->headers, "\r\nConnection: ")) {
744 if (s->multiple_requests)
745 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
746 sizeof(headers) - len);
748 len += av_strlcpy(headers + len, "Connection: close\r\n",
749 sizeof(headers) - len);
752 if (!has_header(s->headers, "\r\nHost: "))
753 len += av_strlcatf(headers + len, sizeof(headers) - len,
754 "Host: %s\r\n", hoststr);
755 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
756 len += av_strlcatf(headers + len, sizeof(headers) - len,
757 "Content-Length: %d\r\n", s->post_datalen);
759 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
760 len += av_strlcatf(headers + len, sizeof(headers) - len,
761 "Content-Type: %s\r\n", s->content_type);
762 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
763 char *cookies = NULL;
764 if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
765 len += av_strlcatf(headers + len, sizeof(headers) - len,
766 "Cookie: %s\r\n", cookies);
770 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
771 len += av_strlcatf(headers + len, sizeof(headers) - len,
772 "Icy-MetaData: %d\r\n", 1);
774 /* now add in custom headers */
776 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
778 snprintf(s->buffer, sizeof(s->buffer),
787 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
789 authstr ? authstr : "",
790 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
792 av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
794 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
798 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
801 /* init input buffer */
802 s->buf_ptr = s->buffer;
803 s->buf_end = s->buffer;
806 s->icy_data_read = 0;
809 s->end_chunked_post = 0;
811 if (post && !s->post_data && !send_expect_100) {
812 /* Pretend that it did work. We didn't read any header yet, since
813 * we've still to send the POST data, but the code calling this
814 * function will check http_code after we return. */
820 /* wait for header */
821 err = http_read_header(h, new_location);
825 err = (off == s->off) ? 0 : -1;
828 av_freep(&proxyauthstr);
832 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
834 HTTPContext *s = h->priv_data;
836 /* read bytes from input buffer first */
837 len = s->buf_end - s->buf_ptr;
841 memcpy(buf, s->buf_ptr, len);
844 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
846 len = ffurl_read(s->hd, buf, size);
850 if (s->chunksize > 0)
857 #define DECOMPRESS_BUF_SIZE (256 * 1024)
858 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
860 HTTPContext *s = h->priv_data;
863 if (!s->inflate_buffer) {
864 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
865 if (!s->inflate_buffer)
866 return AVERROR(ENOMEM);
869 if (s->inflate_stream.avail_in == 0) {
870 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
873 s->inflate_stream.next_in = s->inflate_buffer;
874 s->inflate_stream.avail_in = read;
877 s->inflate_stream.avail_out = size;
878 s->inflate_stream.next_out = buf;
880 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
881 if (ret != Z_OK && ret != Z_STREAM_END)
882 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
883 ret, s->inflate_stream.msg);
885 return size - s->inflate_stream.avail_out;
887 #endif /* CONFIG_ZLIB */
889 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
891 HTTPContext *s = h->priv_data;
892 int err, new_location;
897 if (s->end_chunked_post && !s->end_header) {
898 err = http_read_header(h, &new_location);
903 if (s->chunksize >= 0) {
908 if ((err = http_get_line(s, line, sizeof(line))) < 0)
910 } while (!*line); /* skip CR LF from last chunk */
912 s->chunksize = strtoll(line, NULL, 16);
914 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n",
920 size = FFMIN(size, s->chunksize);
924 return http_buf_read_compressed(h, buf, size);
925 #endif /* CONFIG_ZLIB */
926 return http_buf_read(h, buf, size);
929 // Like http_read_stream(), but no short reads.
930 // Assumes partial reads are an error.
931 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
935 int len = http_read_stream(h, buf + pos, size - pos);
943 static int store_icy(URLContext *h, int size)
945 HTTPContext *s = h->priv_data;
946 /* until next metadata packet */
947 int remaining = s->icy_metaint - s->icy_data_read;
950 return AVERROR_INVALIDDATA;
953 /* The metadata packet is variable sized. It has a 1 byte header
954 * which sets the length of the packet (divided by 16). If it's 0,
955 * the metadata doesn't change. After the packet, icy_metaint bytes
956 * of normal data follows. */
958 int len = http_read_stream_all(h, &ch, 1);
962 char data[255 * 16 + 1];
965 ret = http_read_stream_all(h, data, len);
969 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
972 s->icy_data_read = 0;
973 remaining = s->icy_metaint;
976 return FFMIN(size, remaining);
979 static int http_read(URLContext *h, uint8_t *buf, int size)
981 HTTPContext *s = h->priv_data;
983 if (s->icy_metaint > 0) {
984 size = store_icy(h, size);
989 size = http_read_stream(h, buf, size);
991 s->icy_data_read += size;
995 /* used only when posting data */
996 static int http_write(URLContext *h, const uint8_t *buf, int size)
998 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1000 char crlf[] = "\r\n";
1001 HTTPContext *s = h->priv_data;
1003 if (!s->chunked_post) {
1004 /* non-chunked data is sent without any special encoding */
1005 return ffurl_write(s->hd, buf, size);
1008 /* silently ignore zero-size data since chunk encoding that would
1011 /* upload data using chunked encoding */
1012 snprintf(temp, sizeof(temp), "%x\r\n", size);
1014 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1015 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1016 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1022 static int http_shutdown(URLContext *h, int flags)
1025 char footer[] = "0\r\n\r\n";
1026 HTTPContext *s = h->priv_data;
1028 /* signal end of chunked encoding if used */
1029 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1030 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1031 ret = ret > 0 ? 0 : ret;
1032 s->end_chunked_post = 1;
1038 static int http_close(URLContext *h)
1041 HTTPContext *s = h->priv_data;
1044 inflateEnd(&s->inflate_stream);
1045 av_freep(&s->inflate_buffer);
1046 #endif /* CONFIG_ZLIB */
1048 if (!s->end_chunked_post)
1049 /* Close the write direction by sending the end of chunked encoding. */
1050 ret = http_shutdown(h, h->flags);
1053 ffurl_closep(&s->hd);
1054 av_dict_free(&s->chained_options);
1058 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1060 HTTPContext *s = h->priv_data;
1061 URLContext *old_hd = s->hd;
1062 int64_t old_off = s->off;
1063 uint8_t old_buf[BUFFER_SIZE];
1064 int old_buf_size, ret;
1065 AVDictionary *options = NULL;
1067 if (whence == AVSEEK_SIZE)
1069 else if ((whence == SEEK_CUR && off == 0) ||
1070 (whence == SEEK_SET && off == s->off))
1072 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1073 return AVERROR(ENOSYS);
1075 if (whence == SEEK_CUR)
1077 else if (whence == SEEK_END)
1079 else if (whence != SEEK_SET)
1080 return AVERROR(EINVAL);
1082 return AVERROR(EINVAL);
1085 /* we save the old context in case the seek fails */
1086 old_buf_size = s->buf_end - s->buf_ptr;
1087 memcpy(old_buf, s->buf_ptr, old_buf_size);
1090 /* if it fails, continue on old connection */
1091 av_dict_copy(&options, s->chained_options, 0);
1092 if ((ret = http_open_cnx(h, &options)) < 0) {
1093 av_dict_free(&options);
1094 memcpy(s->buffer, old_buf, old_buf_size);
1095 s->buf_ptr = s->buffer;
1096 s->buf_end = s->buffer + old_buf_size;
1101 av_dict_free(&options);
1102 ffurl_close(old_hd);
1106 static int http_get_file_handle(URLContext *h)
1108 HTTPContext *s = h->priv_data;
1109 return ffurl_get_file_handle(s->hd);
1112 #define HTTP_CLASS(flavor) \
1113 static const AVClass flavor ## _context_class = { \
1114 .class_name = # flavor, \
1115 .item_name = av_default_item_name, \
1116 .option = options, \
1117 .version = LIBAVUTIL_VERSION_INT, \
1120 #if CONFIG_HTTP_PROTOCOL
1123 URLProtocol ff_http_protocol = {
1125 .url_open2 = http_open,
1126 .url_read = http_read,
1127 .url_write = http_write,
1128 .url_seek = http_seek,
1129 .url_close = http_close,
1130 .url_get_file_handle = http_get_file_handle,
1131 .url_shutdown = http_shutdown,
1132 .priv_data_size = sizeof(HTTPContext),
1133 .priv_data_class = &http_context_class,
1134 .flags = URL_PROTOCOL_FLAG_NETWORK,
1136 #endif /* CONFIG_HTTP_PROTOCOL */
1138 #if CONFIG_HTTPS_PROTOCOL
1141 URLProtocol ff_https_protocol = {
1143 .url_open2 = http_open,
1144 .url_read = http_read,
1145 .url_write = http_write,
1146 .url_seek = http_seek,
1147 .url_close = http_close,
1148 .url_get_file_handle = http_get_file_handle,
1149 .url_shutdown = http_shutdown,
1150 .priv_data_size = sizeof(HTTPContext),
1151 .priv_data_class = &https_context_class,
1152 .flags = URL_PROTOCOL_FLAG_NETWORK,
1154 #endif /* CONFIG_HTTPS_PROTOCOL */
1156 #if CONFIG_HTTPPROXY_PROTOCOL
1157 static int http_proxy_close(URLContext *h)
1159 HTTPContext *s = h->priv_data;
1161 ffurl_closep(&s->hd);
1165 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1167 HTTPContext *s = h->priv_data;
1168 char hostname[1024], hoststr[1024];
1169 char auth[1024], pathbuf[1024], *path;
1170 char lower_url[100];
1171 int port, ret = 0, attempts = 0;
1172 HTTPAuthType cur_auth_type;
1176 if( s->seekable == 1 )
1181 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1182 pathbuf, sizeof(pathbuf), uri);
1183 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1188 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1191 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1192 &h->interrupt_callback, NULL);
1196 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1198 snprintf(s->buffer, sizeof(s->buffer),
1199 "CONNECT %s HTTP/1.1\r\n"
1201 "Connection: close\r\n"
1206 authstr ? "Proxy-" : "", authstr ? authstr : "");
1209 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1212 s->buf_ptr = s->buffer;
1213 s->buf_end = s->buffer;
1216 cur_auth_type = s->proxy_auth_state.auth_type;
1218 /* Note: This uses buffering, potentially reading more than the
1219 * HTTP header. If tunneling a protocol where the server starts
1220 * the conversation, we might buffer part of that here, too.
1221 * Reading that requires using the proper ffurl_read() function
1222 * on this URLContext, not using the fd directly (as the tls
1223 * protocol does). This shouldn't be an issue for tls though,
1224 * since the client starts the conversation there, so there
1225 * is no extra data that we might buffer up here.
1227 ret = http_read_header(h, &new_loc);
1232 if (s->http_code == 407 &&
1233 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1234 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1235 ffurl_closep(&s->hd);
1239 if (s->http_code < 400)
1244 http_proxy_close(h);
1248 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1250 HTTPContext *s = h->priv_data;
1251 return ffurl_write(s->hd, buf, size);
1254 URLProtocol ff_httpproxy_protocol = {
1255 .name = "httpproxy",
1256 .url_open = http_proxy_open,
1257 .url_read = http_buf_read,
1258 .url_write = http_proxy_write,
1259 .url_close = http_proxy_close,
1260 .url_get_file_handle = http_get_file_handle,
1261 .priv_data_size = sizeof(HTTPContext),
1262 .flags = URL_PROTOCOL_FLAG_NETWORK,
1264 #endif /* CONFIG_HTTPPROXY_PROTOCOL */