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"
32 /* XXX: POST protocol is not completely implemented because ffmpeg uses
33 only a subset of it. */
35 /* The IO buffer size is unrelated to the max URL size in itself, but needs
36 * to be large enough to fit the full request headers (including long
39 #define BUFFER_SIZE MAX_URL_SIZE
40 #define MAX_REDIRECTS 8
45 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
48 int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
51 int64_t off, filesize;
52 char location[MAX_URL_SIZE];
53 HTTPAuthState auth_state;
54 HTTPAuthState proxy_auth_state;
56 int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */
57 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
59 int end_chunked_post; /**< A flag which indicates if the end of chunked encoding has been sent. */
60 int end_header; /**< A flag which indicates we have finished to read POST reply. */
61 int multiple_requests; /**< A flag which indicates if we use persistent connections. */
67 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
70 #define OFFSET(x) offsetof(HTTPContext, x)
71 #define D AV_OPT_FLAG_DECODING_PARAM
72 #define E AV_OPT_FLAG_ENCODING_PARAM
73 #define DEC AV_OPT_FLAG_DECODING_PARAM
74 static const AVOption options[] = {
75 {"seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, D },
76 {"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
77 {"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
78 {"content_type", "force a content type", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
79 {"user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC},
80 {"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
81 {"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E },
82 {"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
83 {"mime_type", "set MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 },
84 {"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, 0 },
87 #define HTTP_CLASS(flavor)\
88 static const AVClass flavor ## _context_class = {\
89 .class_name = #flavor,\
90 .item_name = av_default_item_name,\
92 .version = LIBAVUTIL_VERSION_INT,\
98 static int http_connect(URLContext *h, const char *path, const char *local_path,
99 const char *hoststr, const char *auth,
100 const char *proxyauth, int *new_location);
102 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
104 memcpy(&((HTTPContext*)dest->priv_data)->auth_state,
105 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState));
106 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state,
107 &((HTTPContext*)src->priv_data)->proxy_auth_state,
108 sizeof(HTTPAuthState));
111 /* return non zero if error */
112 static int http_open_cnx(URLContext *h)
114 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
115 char hostname[1024], hoststr[1024], proto[10];
116 char auth[1024], proxyauth[1024] = "";
117 char path1[MAX_URL_SIZE];
118 char buf[1024], urlbuf[MAX_URL_SIZE];
119 int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0;
120 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
121 HTTPContext *s = h->priv_data;
123 proxy_path = getenv("http_proxy");
124 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
125 av_strstart(proxy_path, "http://", NULL);
127 /* fill the dest addr */
129 /* needed in any case to build the host string */
130 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
131 hostname, sizeof(hostname), &port,
132 path1, sizeof(path1), s->location);
133 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
135 if (!strcmp(proto, "https")) {
144 if (path1[0] == '\0')
150 /* Reassemble the request URL without auth string - we don't
151 * want to leak the auth to the proxy. */
152 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
155 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
156 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
159 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
162 AVDictionary *opts = NULL;
163 char opts_format[20];
164 if (s->rw_timeout != -1) {
165 snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
166 av_dict_set(&opts, "timeout", opts_format, 0);
167 } /* if option is not given, don't pass it and let tcp use its own default */
168 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
169 &h->interrupt_callback, &opts);
175 cur_auth_type = s->auth_state.auth_type;
176 cur_proxy_auth_type = s->auth_state.auth_type;
177 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0)
180 if (s->http_code == 401) {
181 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
182 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
183 ffurl_closep(&s->hd);
188 if (s->http_code == 407) {
189 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
190 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
191 ffurl_closep(&s->hd);
196 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307)
197 && location_changed == 1) {
198 /* url moved, get next */
199 ffurl_closep(&s->hd);
200 if (redirects++ >= MAX_REDIRECTS)
202 /* Restart the authentication process with the new target, which
203 * might use a different auth mechanism. */
204 memset(&s->auth_state, 0, sizeof(s->auth_state));
206 location_changed = 0;
212 ffurl_closep(&s->hd);
216 int ff_http_do_new_request(URLContext *h, const char *uri)
218 HTTPContext *s = h->priv_data;
221 av_strlcpy(s->location, uri, sizeof(s->location));
223 return http_open_cnx(h);
226 static int http_open(URLContext *h, const char *uri, int flags)
228 HTTPContext *s = h->priv_data;
230 if( s->seekable == 1 )
236 av_strlcpy(s->location, uri, sizeof(s->location));
239 int len = strlen(s->headers);
240 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
241 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n");
244 return http_open_cnx(h);
246 static int http_getc(HTTPContext *s)
249 if (s->buf_ptr >= s->buf_end) {
250 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
253 } else if (len == 0) {
256 s->buf_ptr = s->buffer;
257 s->buf_end = s->buffer + len;
260 return *s->buf_ptr++;
263 static int http_get_line(HTTPContext *s, char *line, int line_size)
275 if (q > line && q[-1] == '\r')
281 if ((q - line) < line_size - 1)
287 static int process_line(URLContext *h, char *line, int line_count,
290 HTTPContext *s = h->priv_data;
294 if (line[0] == '\0') {
300 if (line_count == 0) {
301 while (!isspace(*p) && *p != '\0')
305 s->http_code = strtol(p, &end, 10);
307 av_dlog(NULL, "http_code=%d\n", s->http_code);
309 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
310 * don't abort until all headers have been parsed. */
311 if (s->http_code >= 400 && s->http_code < 600 && (s->http_code != 401
312 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
313 (s->http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
314 end += strspn(end, SPACE_CHARS);
315 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n",
320 while (*p != '\0' && *p != ':')
330 if (!av_strcasecmp(tag, "Location")) {
331 av_strlcpy(s->location, p, sizeof(s->location));
333 } else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
334 s->filesize = strtoll(p, NULL, 10);
335 } else if (!av_strcasecmp (tag, "Content-Range")) {
336 /* "bytes $from-$to/$document_size" */
338 if (!strncmp (p, "bytes ", 6)) {
340 s->off = strtoll(p, NULL, 10);
341 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
342 s->filesize = strtoll(slash+1, NULL, 10);
344 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
345 h->is_streamed = 0; /* we _can_ in fact seek */
346 } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5) && s->seekable == -1) {
348 } else if (!av_strcasecmp (tag, "Transfer-Encoding") && !av_strncasecmp(p, "chunked", 7)) {
351 } else if (!av_strcasecmp (tag, "WWW-Authenticate")) {
352 ff_http_auth_handle_header(&s->auth_state, tag, p);
353 } else if (!av_strcasecmp (tag, "Authentication-Info")) {
354 ff_http_auth_handle_header(&s->auth_state, tag, p);
355 } else if (!av_strcasecmp (tag, "Proxy-Authenticate")) {
356 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
357 } else if (!av_strcasecmp (tag, "Connection")) {
358 if (!strcmp(p, "close"))
360 } else if (!av_strcasecmp (tag, "Server") && !av_strcasecmp (p, "AkamaiGHost")) {
362 } else if (!av_strcasecmp (tag, "Content-Type")) {
363 av_free(s->mime_type); s->mime_type = av_strdup(p);
364 } else if (!av_strcasecmp (tag, "Set-Cookie")) {
366 if (!(s->cookies = av_strdup(p)))
367 return AVERROR(ENOMEM);
369 char *tmp = s->cookies;
370 size_t str_size = strlen(tmp) + strlen(p) + 2;
371 if (!(s->cookies = av_malloc(str_size))) {
373 return AVERROR(ENOMEM);
375 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
384 * Create a string containing cookie values for use as a HTTP cookie header
385 * field value for a particular path and domain from the cookie values stored in
386 * the HTTP protocol context. The cookie string is stored in *cookies.
388 * @return a negative value if an error condition occurred, 0 otherwise
390 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
393 // cookie strings will look like Set-Cookie header field values. Multiple
394 // Set-Cookie fields will result in multiple values delimited by a newline
396 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
398 if (!set_cookies) return AVERROR(EINVAL);
401 while ((cookie = av_strtok(set_cookies, "\n", &next))) {
402 int domain_offset = 0;
403 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
406 while ((param = av_strtok(cookie, "; ", &next_param))) {
408 if (!av_strncasecmp("path=", param, 5)) {
410 cpath = av_strdup(¶m[5]);
411 } else if (!av_strncasecmp("domain=", param, 7)) {
413 cdomain = av_strdup(¶m[7]);
414 } else if (!av_strncasecmp("secure", param, 6) ||
415 !av_strncasecmp("comment", param, 7) ||
416 !av_strncasecmp("max-age", param, 7) ||
417 !av_strncasecmp("version", param, 7)) {
418 // ignore Comment, Max-Age, Secure and Version
421 cvalue = av_strdup(param);
425 // ensure all of the necessary values are valid
426 if (!cdomain || !cpath || !cvalue) {
427 av_log(s, AV_LOG_WARNING,
428 "Invalid cookie found, no value, path or domain specified\n");
432 // check if the request path matches the cookie path
433 if (av_strncasecmp(path, cpath, strlen(cpath)))
436 // the domain should be at least the size of our cookie domain
437 domain_offset = strlen(domain) - strlen(cdomain);
438 if (domain_offset < 0)
441 // match the cookie domain
442 if (av_strcasecmp(&domain[domain_offset], cdomain))
445 // cookie parameters match, so copy the value
447 if (!(*cookies = av_strdup(cvalue))) {
448 ret = AVERROR(ENOMEM);
452 char *tmp = *cookies;
453 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
454 if (!(*cookies = av_malloc(str_size))) {
455 ret = AVERROR(ENOMEM);
458 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
467 if (*cookies) av_freep(cookies);
468 av_free(cset_cookies);
473 av_free(cset_cookies);
478 static inline int has_header(const char *str, const char *header)
480 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
483 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
486 static int http_read_header(URLContext *h, int *new_location)
488 HTTPContext *s = h->priv_data;
489 char line[MAX_URL_SIZE];
495 if ((err = http_get_line(s, line, sizeof(line))) < 0)
498 av_dlog(NULL, "header='%s'\n", line);
500 err = process_line(h, line, s->line_count, new_location);
511 static int http_connect(URLContext *h, const char *path, const char *local_path,
512 const char *hoststr, const char *auth,
513 const char *proxyauth, int *new_location)
515 HTTPContext *s = h->priv_data;
517 char headers[4096] = "";
518 char *authstr = NULL, *proxyauthstr = NULL;
519 int64_t off = s->off;
524 /* send http header */
525 post = h->flags & AVIO_FLAG_WRITE;
528 /* force POST method and disable chunked encoding when
529 * custom HTTP post data is set */
534 method = post ? "POST" : "GET";
535 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path,
537 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
540 /* set default headers if needed */
541 if (!has_header(s->headers, "\r\nUser-Agent: "))
542 len += av_strlcatf(headers + len, sizeof(headers) - len,
543 "User-Agent: %s\r\n",
544 s->user_agent ? s->user_agent : LIBAVFORMAT_IDENT);
545 if (!has_header(s->headers, "\r\nAccept: "))
546 len += av_strlcpy(headers + len, "Accept: */*\r\n",
547 sizeof(headers) - len);
548 // Note: we send this on purpose even when s->off is 0 when we're probing,
549 // since it allows us to detect more reliably if a (non-conforming)
550 // server supports seeking by analysing the reply headers.
551 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->seekable == -1))
552 len += av_strlcatf(headers + len, sizeof(headers) - len,
553 "Range: bytes=%"PRId64"-\r\n", s->off);
555 if (!has_header(s->headers, "\r\nConnection: ")) {
556 if (s->multiple_requests) {
557 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
558 sizeof(headers) - len);
560 len += av_strlcpy(headers + len, "Connection: close\r\n",
561 sizeof(headers) - len);
565 if (!has_header(s->headers, "\r\nHost: "))
566 len += av_strlcatf(headers + len, sizeof(headers) - len,
567 "Host: %s\r\n", hoststr);
568 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
569 len += av_strlcatf(headers + len, sizeof(headers) - len,
570 "Content-Length: %d\r\n", s->post_datalen);
571 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
572 len += av_strlcatf(headers + len, sizeof(headers) - len,
573 "Content-Type: %s\r\n", s->content_type);
574 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
575 char *cookies = NULL;
576 if (!get_cookies(s, &cookies, path, hoststr)) {
577 len += av_strlcatf(headers + len, sizeof(headers) - len,
578 "Cookie: %s\r\n", cookies);
583 /* now add in custom headers */
585 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
587 snprintf(s->buffer, sizeof(s->buffer),
596 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
598 authstr ? authstr : "",
599 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
602 av_freep(&proxyauthstr);
603 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
607 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
610 /* init input buffer */
611 s->buf_ptr = s->buffer;
612 s->buf_end = s->buffer;
617 s->end_chunked_post = 0;
619 if (post && !s->post_data) {
620 /* Pretend that it did work. We didn't read any header yet, since
621 * we've still to send the POST data, but the code calling this
622 * function will check http_code after we return. */
627 /* wait for header */
628 err = http_read_header(h, new_location);
632 return (off == s->off) ? 0 : -1;
636 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
638 HTTPContext *s = h->priv_data;
640 /* read bytes from input buffer first */
641 len = s->buf_end - s->buf_ptr;
645 memcpy(buf, s->buf_ptr, len);
648 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize)
650 len = ffurl_read(s->hd, buf, size);
654 if (s->chunksize > 0)
660 static int http_read(URLContext *h, uint8_t *buf, int size)
662 HTTPContext *s = h->priv_data;
663 int err, new_location;
668 if (s->end_chunked_post && !s->end_header) {
669 err = http_read_header(h, &new_location);
674 if (s->chunksize >= 0) {
680 if ((err = http_get_line(s, line, sizeof(line))) < 0)
682 } while (!*line); /* skip CR LF from last chunk */
684 s->chunksize = strtoll(line, NULL, 16);
686 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
693 size = FFMIN(size, s->chunksize);
695 return http_buf_read(h, buf, size);
698 /* used only when posting data */
699 static int http_write(URLContext *h, const uint8_t *buf, int size)
701 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
703 char crlf[] = "\r\n";
704 HTTPContext *s = h->priv_data;
706 if (!s->chunked_post) {
707 /* non-chunked data is sent without any special encoding */
708 return ffurl_write(s->hd, buf, size);
711 /* silently ignore zero-size data since chunk encoding that would
714 /* upload data using chunked encoding */
715 snprintf(temp, sizeof(temp), "%x\r\n", size);
717 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
718 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
719 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
725 static int http_shutdown(URLContext *h, int flags)
728 char footer[] = "0\r\n\r\n";
729 HTTPContext *s = h->priv_data;
731 /* signal end of chunked encoding if used */
732 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
733 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
734 ret = ret > 0 ? 0 : ret;
735 s->end_chunked_post = 1;
741 static int http_close(URLContext *h)
744 HTTPContext *s = h->priv_data;
746 if (!s->end_chunked_post) {
747 /* Close the write direction by sending the end of chunked encoding. */
748 ret = http_shutdown(h, h->flags);
752 ffurl_closep(&s->hd);
756 static int64_t http_seek(URLContext *h, int64_t off, int whence)
758 HTTPContext *s = h->priv_data;
759 URLContext *old_hd = s->hd;
760 int64_t old_off = s->off;
761 uint8_t old_buf[BUFFER_SIZE];
764 if (whence == AVSEEK_SIZE)
766 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
769 /* we save the old context in case the seek fails */
770 old_buf_size = s->buf_end - s->buf_ptr;
771 memcpy(old_buf, s->buf_ptr, old_buf_size);
773 if (whence == SEEK_CUR)
775 else if (whence == SEEK_END)
779 /* if it fails, continue on old connection */
780 if (http_open_cnx(h) < 0) {
781 memcpy(s->buffer, old_buf, old_buf_size);
782 s->buf_ptr = s->buffer;
783 s->buf_end = s->buffer + old_buf_size;
793 http_get_file_handle(URLContext *h)
795 HTTPContext *s = h->priv_data;
796 return ffurl_get_file_handle(s->hd);
799 #if CONFIG_HTTP_PROTOCOL
800 URLProtocol ff_http_protocol = {
802 .url_open = http_open,
803 .url_read = http_read,
804 .url_write = http_write,
805 .url_seek = http_seek,
806 .url_close = http_close,
807 .url_get_file_handle = http_get_file_handle,
808 .url_shutdown = http_shutdown,
809 .priv_data_size = sizeof(HTTPContext),
810 .priv_data_class = &http_context_class,
811 .flags = URL_PROTOCOL_FLAG_NETWORK,
814 #if CONFIG_HTTPS_PROTOCOL
815 URLProtocol ff_https_protocol = {
817 .url_open = http_open,
818 .url_read = http_read,
819 .url_write = http_write,
820 .url_seek = http_seek,
821 .url_close = http_close,
822 .url_get_file_handle = http_get_file_handle,
823 .url_shutdown = http_shutdown,
824 .priv_data_size = sizeof(HTTPContext),
825 .priv_data_class = &https_context_class,
826 .flags = URL_PROTOCOL_FLAG_NETWORK,
830 #if CONFIG_HTTPPROXY_PROTOCOL
831 static int http_proxy_close(URLContext *h)
833 HTTPContext *s = h->priv_data;
835 ffurl_closep(&s->hd);
839 static int http_proxy_open(URLContext *h, const char *uri, int flags)
841 HTTPContext *s = h->priv_data;
842 char hostname[1024], hoststr[1024];
843 char auth[1024], pathbuf[1024], *path;
845 int port, ret = 0, attempts = 0;
846 HTTPAuthType cur_auth_type;
849 AVDictionary *opts = NULL;
850 char opts_format[20];
852 if( s->seekable == 1 )
857 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
858 pathbuf, sizeof(pathbuf), uri);
859 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
864 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
867 if (s->rw_timeout != -1) {
868 snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
869 av_dict_set(&opts, "timeout", opts_format, 0);
870 } /* if option is not given, don't pass it and let tcp use its own default */
871 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
872 &h->interrupt_callback, &opts);
877 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
879 snprintf(s->buffer, sizeof(s->buffer),
880 "CONNECT %s HTTP/1.1\r\n"
882 "Connection: close\r\n"
887 authstr ? "Proxy-" : "", authstr ? authstr : "");
890 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
893 s->buf_ptr = s->buffer;
894 s->buf_end = s->buffer;
897 cur_auth_type = s->proxy_auth_state.auth_type;
899 /* Note: This uses buffering, potentially reading more than the
900 * HTTP header. If tunneling a protocol where the server starts
901 * the conversation, we might buffer part of that here, too.
902 * Reading that requires using the proper ffurl_read() function
903 * on this URLContext, not using the fd directly (as the tls
904 * protocol does). This shouldn't be an issue for tls though,
905 * since the client starts the conversation there, so there
906 * is no extra data that we might buffer up here.
908 ret = http_read_header(h, &new_loc);
913 if (s->http_code == 407 &&
914 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
915 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
916 ffurl_closep(&s->hd);
920 if (s->http_code < 400)
929 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
931 HTTPContext *s = h->priv_data;
932 return ffurl_write(s->hd, buf, size);
935 URLProtocol ff_httpproxy_protocol = {
937 .url_open = http_proxy_open,
938 .url_read = http_buf_read,
939 .url_write = http_proxy_write,
940 .url_close = http_proxy_close,
941 .url_get_file_handle = http_get_file_handle,
942 .priv_data_size = sizeof(HTTPContext),
943 .flags = URL_PROTOCOL_FLAG_NETWORK,