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;
87 AVDictionary *metadata;
90 z_stream inflate_stream;
91 uint8_t *inflate_buffer;
92 #endif /* CONFIG_ZLIB */
93 AVDictionary *chained_options;
98 #define OFFSET(x) offsetof(HTTPContext, x)
99 #define D AV_OPT_FLAG_DECODING_PARAM
100 #define E AV_OPT_FLAG_ENCODING_PARAM
101 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
103 static const AVOption options[] = {
104 { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D },
105 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
106 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
107 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
108 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
109 { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
110 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
111 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
112 { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
113 { "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 },
114 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
115 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
116 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
117 { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
118 { "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"},
119 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
120 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
121 { "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 },
122 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
123 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
124 { "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 },
125 { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
129 static int http_connect(URLContext *h, const char *path, const char *local_path,
130 const char *hoststr, const char *auth,
131 const char *proxyauth, int *new_location);
133 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
135 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
136 &((HTTPContext *)src->priv_data)->auth_state,
137 sizeof(HTTPAuthState));
138 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
139 &((HTTPContext *)src->priv_data)->proxy_auth_state,
140 sizeof(HTTPAuthState));
143 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
145 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
146 char hostname[1024], hoststr[1024], proto[10];
147 char auth[1024], proxyauth[1024] = "";
148 char path1[MAX_URL_SIZE];
149 char buf[1024], urlbuf[MAX_URL_SIZE];
150 int port, use_proxy, err, location_changed = 0;
151 HTTPContext *s = h->priv_data;
153 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
154 hostname, sizeof(hostname), &port,
155 path1, sizeof(path1), s->location);
156 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
158 proxy_path = getenv("http_proxy");
159 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
160 proxy_path && av_strstart(proxy_path, "http://", NULL);
162 if (!strcmp(proto, "https")) {
171 if (path1[0] == '\0')
177 /* Reassemble the request URL without auth string - we don't
178 * want to leak the auth to the proxy. */
179 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
182 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
183 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
186 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
189 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
190 &h->interrupt_callback, options);
195 err = http_connect(h, path, local_path, hoststr,
196 auth, proxyauth, &location_changed);
200 return location_changed;
203 /* return non zero if error */
204 static int http_open_cnx(URLContext *h, AVDictionary **options)
206 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
207 HTTPContext *s = h->priv_data;
208 int location_changed, attempts = 0, redirects = 0;
210 av_dict_copy(options, s->chained_options, 0);
212 cur_auth_type = s->auth_state.auth_type;
213 cur_proxy_auth_type = s->auth_state.auth_type;
215 location_changed = http_open_cnx_internal(h, options);
216 if (location_changed < 0)
220 if (s->http_code == 401) {
221 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
222 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
223 ffurl_closep(&s->hd);
228 if (s->http_code == 407) {
229 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
230 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
231 ffurl_closep(&s->hd);
236 if ((s->http_code == 301 || s->http_code == 302 ||
237 s->http_code == 303 || s->http_code == 307) &&
238 location_changed == 1) {
239 /* url moved, get next */
240 ffurl_closep(&s->hd);
241 if (redirects++ >= MAX_REDIRECTS)
243 /* Restart the authentication process with the new target, which
244 * might use a different auth mechanism. */
245 memset(&s->auth_state, 0, sizeof(s->auth_state));
247 location_changed = 0;
254 ffurl_closep(&s->hd);
255 if (location_changed < 0)
256 return location_changed;
257 return ff_http_averror(s->http_code, AVERROR(EIO));
260 int ff_http_do_new_request(URLContext *h, const char *uri)
262 HTTPContext *s = h->priv_data;
263 AVDictionary *options = NULL;
267 s->icy_data_read = 0;
268 av_free(s->location);
269 s->location = av_strdup(uri);
271 return AVERROR(ENOMEM);
273 ret = http_open_cnx(h, &options);
274 av_dict_free(&options);
278 int ff_http_averror(int status_code, int default_averror)
280 switch (status_code) {
281 case 400: return AVERROR_HTTP_BAD_REQUEST;
282 case 401: return AVERROR_HTTP_UNAUTHORIZED;
283 case 403: return AVERROR_HTTP_FORBIDDEN;
284 case 404: return AVERROR_HTTP_NOT_FOUND;
287 if (status_code >= 400 && status_code <= 499)
288 return AVERROR_HTTP_OTHER_4XX;
289 else if (status_code >= 500)
290 return AVERROR_HTTP_SERVER_ERROR;
292 return default_averror;
295 static int http_open(URLContext *h, const char *uri, int flags,
296 AVDictionary **options)
298 HTTPContext *s = h->priv_data;
301 if( s->seekable == 1 )
307 s->location = av_strdup(uri);
309 return AVERROR(ENOMEM);
311 av_dict_copy(&s->chained_options, *options, 0);
314 int len = strlen(s->headers);
315 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
316 av_log(h, AV_LOG_WARNING,
317 "No trailing CRLF found in HTTP header.\n");
320 ret = http_open_cnx(h, options);
322 av_dict_free(&s->chained_options);
326 static int http_getc(HTTPContext *s)
329 if (s->buf_ptr >= s->buf_end) {
330 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
333 } else if (len == 0) {
336 s->buf_ptr = s->buffer;
337 s->buf_end = s->buffer + len;
340 return *s->buf_ptr++;
343 static int http_get_line(HTTPContext *s, char *line, int line_size)
355 if (q > line && q[-1] == '\r')
361 if ((q - line) < line_size - 1)
367 static int check_http_code(URLContext *h, int http_code, const char *end)
369 HTTPContext *s = h->priv_data;
370 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
371 * don't abort until all headers have been parsed. */
372 if (http_code >= 400 && http_code < 600 &&
373 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
374 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
375 end += strspn(end, SPACE_CHARS);
376 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
377 return ff_http_averror(http_code, AVERROR(EIO));
382 static int parse_location(HTTPContext *s, const char *p)
384 char redirected_location[MAX_URL_SIZE], *new_loc;
385 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
387 new_loc = av_strdup(redirected_location);
389 return AVERROR(ENOMEM);
390 av_free(s->location);
391 s->location = new_loc;
395 /* "bytes $from-$to/$document_size" */
396 static void parse_content_range(URLContext *h, const char *p)
398 HTTPContext *s = h->priv_data;
401 if (!strncmp(p, "bytes ", 6)) {
403 s->off = strtoll(p, NULL, 10);
404 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
405 s->filesize = strtoll(slash + 1, NULL, 10);
407 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
408 h->is_streamed = 0; /* we _can_ in fact seek */
411 static int parse_content_encoding(URLContext *h, const char *p)
413 if (!av_strncasecmp(p, "gzip", 4) ||
414 !av_strncasecmp(p, "deflate", 7)) {
416 HTTPContext *s = h->priv_data;
419 inflateEnd(&s->inflate_stream);
420 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
421 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
422 s->inflate_stream.msg);
423 return AVERROR(ENOSYS);
425 if (zlibCompileFlags() & (1 << 17)) {
426 av_log(h, AV_LOG_WARNING,
427 "Your zlib was compiled without gzip support.\n");
428 return AVERROR(ENOSYS);
431 av_log(h, AV_LOG_WARNING,
432 "Compressed (%s) content, need zlib with gzip support\n", p);
433 return AVERROR(ENOSYS);
434 #endif /* CONFIG_ZLIB */
435 } else if (!av_strncasecmp(p, "identity", 8)) {
436 // The normal, no-encoding case (although servers shouldn't include
437 // the header at all if this is the case).
439 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
444 // Concat all Icy- header lines
445 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
447 int len = 4 + strlen(p) + strlen(tag);
448 int is_first = !s->icy_metadata_headers;
451 av_dict_set(&s->metadata, tag, p, 0);
453 if (s->icy_metadata_headers)
454 len += strlen(s->icy_metadata_headers);
456 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
460 *s->icy_metadata_headers = '\0';
462 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
467 static int process_line(URLContext *h, char *line, int line_count,
470 HTTPContext *s = h->priv_data;
475 if (line[0] == '\0') {
481 if (line_count == 0) {
482 while (!av_isspace(*p) && *p != '\0')
484 while (av_isspace(*p))
486 s->http_code = strtol(p, &end, 10);
488 av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code);
490 if ((ret = check_http_code(h, s->http_code, end)) < 0)
493 while (*p != '\0' && *p != ':')
501 while (av_isspace(*p))
503 if (!av_strcasecmp(tag, "Location")) {
504 if ((ret = parse_location(s, p)) < 0)
507 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
508 s->filesize = strtoll(p, NULL, 10);
509 } else if (!av_strcasecmp(tag, "Content-Range")) {
510 parse_content_range(h, p);
511 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
512 !strncmp(p, "bytes", 5) &&
515 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
516 !av_strncasecmp(p, "chunked", 7)) {
519 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
520 ff_http_auth_handle_header(&s->auth_state, tag, p);
521 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
522 ff_http_auth_handle_header(&s->auth_state, tag, p);
523 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
524 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
525 } else if (!av_strcasecmp(tag, "Connection")) {
526 if (!strcmp(p, "close"))
528 } else if (!av_strcasecmp(tag, "Server")) {
529 if (!av_strcasecmp(p, "AkamaiGHost")) {
531 } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
532 s->is_mediagateway = 1;
534 } else if (!av_strcasecmp(tag, "Content-Type")) {
535 av_free(s->mime_type);
536 s->mime_type = av_strdup(p);
537 } else if (!av_strcasecmp(tag, "Set-Cookie")) {
539 if (!(s->cookies = av_strdup(p)))
540 return AVERROR(ENOMEM);
542 char *tmp = s->cookies;
543 size_t str_size = strlen(tmp) + strlen(p) + 2;
544 if (!(s->cookies = av_malloc(str_size))) {
546 return AVERROR(ENOMEM);
548 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
551 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
552 s->icy_metaint = strtoll(p, NULL, 10);
553 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
554 if ((ret = parse_icy(s, tag, p)) < 0)
556 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
557 if ((ret = parse_content_encoding(h, p)) < 0)
565 * Create a string containing cookie values for use as a HTTP cookie header
566 * field value for a particular path and domain from the cookie values stored in
567 * the HTTP protocol context. The cookie string is stored in *cookies.
569 * @return a negative value if an error condition occurred, 0 otherwise
571 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
574 // cookie strings will look like Set-Cookie header field values. Multiple
575 // Set-Cookie fields will result in multiple values delimited by a newline
577 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
579 if (!set_cookies) return AVERROR(EINVAL);
582 while ((cookie = av_strtok(set_cookies, "\n", &next))) {
583 int domain_offset = 0;
584 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
587 while ((param = av_strtok(cookie, "; ", &next_param))) {
589 // first key-value pair is the actual cookie value
590 cvalue = av_strdup(param);
592 } else if (!av_strncasecmp("path=", param, 5)) {
594 cpath = av_strdup(¶m[5]);
595 } else if (!av_strncasecmp("domain=", param, 7)) {
596 // if the cookie specifies a sub-domain, skip the leading dot thereby
597 // supporting URLs that point to sub-domains and the master domain
598 int leading_dot = (param[7] == '.');
600 cdomain = av_strdup(¶m[7+leading_dot]);
602 // ignore unknown attributes
606 cdomain = av_strdup(domain);
608 // ensure all of the necessary values are valid
609 if (!cdomain || !cpath || !cvalue) {
610 av_log(s, AV_LOG_WARNING,
611 "Invalid cookie found, no value, path or domain specified\n");
615 // check if the request path matches the cookie path
616 if (av_strncasecmp(path, cpath, strlen(cpath)))
619 // the domain should be at least the size of our cookie domain
620 domain_offset = strlen(domain) - strlen(cdomain);
621 if (domain_offset < 0)
624 // match the cookie domain
625 if (av_strcasecmp(&domain[domain_offset], cdomain))
628 // cookie parameters match, so copy the value
630 if (!(*cookies = av_strdup(cvalue))) {
631 ret = AVERROR(ENOMEM);
635 char *tmp = *cookies;
636 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
637 if (!(*cookies = av_malloc(str_size))) {
638 ret = AVERROR(ENOMEM);
641 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
650 if (*cookies) av_freep(cookies);
651 av_free(cset_cookies);
656 av_free(cset_cookies);
661 static inline int has_header(const char *str, const char *header)
663 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
666 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
669 static int http_read_header(URLContext *h, int *new_location)
671 HTTPContext *s = h->priv_data;
672 char line[MAX_URL_SIZE];
678 if ((err = http_get_line(s, line, sizeof(line))) < 0)
681 av_log(h, AV_LOG_DEBUG, "header='%s'\n", line);
683 err = process_line(h, line, s->line_count, new_location);
691 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
692 h->is_streamed = 1; /* we can in fact _not_ seek */
697 static int http_connect(URLContext *h, const char *path, const char *local_path,
698 const char *hoststr, const char *auth,
699 const char *proxyauth, int *new_location)
701 HTTPContext *s = h->priv_data;
703 char headers[HTTP_HEADERS_SIZE] = "";
704 char *authstr = NULL, *proxyauthstr = NULL;
705 int64_t off = s->off;
708 int send_expect_100 = 0;
710 /* send http header */
711 post = h->flags & AVIO_FLAG_WRITE;
714 /* force POST method and disable chunked encoding when
715 * custom HTTP post data is set */
723 method = post ? "POST" : "GET";
725 authstr = ff_http_auth_create_response(&s->auth_state, auth,
727 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
729 if (post && !s->post_data) {
730 send_expect_100 = s->send_expect_100;
731 /* The user has supplied authentication but we don't know the auth type,
732 * send Expect: 100-continue to get the 401 response including the
733 * WWW-Authenticate header, or an 100 continue if no auth actually
736 s->auth_state.auth_type == HTTP_AUTH_NONE &&
741 /* set default headers if needed */
742 if (!has_header(s->headers, "\r\nUser-Agent: "))
743 len += av_strlcatf(headers + len, sizeof(headers) - len,
744 "User-Agent: %s\r\n", s->user_agent);
745 if (!has_header(s->headers, "\r\nAccept: "))
746 len += av_strlcpy(headers + len, "Accept: */*\r\n",
747 sizeof(headers) - len);
748 // Note: we send this on purpose even when s->off is 0 when we're probing,
749 // since it allows us to detect more reliably if a (non-conforming)
750 // server supports seeking by analysing the reply headers.
751 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
752 len += av_strlcatf(headers + len, sizeof(headers) - len,
753 "Range: bytes=%"PRId64"-", s->off);
755 len += av_strlcatf(headers + len, sizeof(headers) - len,
756 "%"PRId64, s->end_off - 1);
757 len += av_strlcpy(headers + len, "\r\n",
758 sizeof(headers) - len);
760 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
761 len += av_strlcatf(headers + len, sizeof(headers) - len,
762 "Expect: 100-continue\r\n");
764 if (!has_header(s->headers, "\r\nConnection: ")) {
765 if (s->multiple_requests)
766 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
767 sizeof(headers) - len);
769 len += av_strlcpy(headers + len, "Connection: close\r\n",
770 sizeof(headers) - len);
773 if (!has_header(s->headers, "\r\nHost: "))
774 len += av_strlcatf(headers + len, sizeof(headers) - len,
775 "Host: %s\r\n", hoststr);
776 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
777 len += av_strlcatf(headers + len, sizeof(headers) - len,
778 "Content-Length: %d\r\n", s->post_datalen);
780 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
781 len += av_strlcatf(headers + len, sizeof(headers) - len,
782 "Content-Type: %s\r\n", s->content_type);
783 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
784 char *cookies = NULL;
785 if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
786 len += av_strlcatf(headers + len, sizeof(headers) - len,
787 "Cookie: %s\r\n", cookies);
791 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
792 len += av_strlcatf(headers + len, sizeof(headers) - len,
793 "Icy-MetaData: %d\r\n", 1);
795 /* now add in custom headers */
797 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
799 snprintf(s->buffer, sizeof(s->buffer),
808 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
810 authstr ? authstr : "",
811 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
813 av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
815 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
819 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
822 /* init input buffer */
823 s->buf_ptr = s->buffer;
824 s->buf_end = s->buffer;
827 s->icy_data_read = 0;
830 s->end_chunked_post = 0;
832 if (post && !s->post_data && !send_expect_100) {
833 /* Pretend that it did work. We didn't read any header yet, since
834 * we've still to send the POST data, but the code calling this
835 * function will check http_code after we return. */
841 /* wait for header */
842 err = http_read_header(h, new_location);
846 err = (off == s->off) ? 0 : -1;
849 av_freep(&proxyauthstr);
853 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
855 HTTPContext *s = h->priv_data;
857 /* read bytes from input buffer first */
858 len = s->buf_end - s->buf_ptr;
862 memcpy(buf, s->buf_ptr, len);
865 if ((!s->willclose || s->chunksize < 0) &&
866 s->filesize >= 0 && s->off >= s->filesize)
868 len = ffurl_read(s->hd, buf, size);
872 if (s->chunksize > 0)
879 #define DECOMPRESS_BUF_SIZE (256 * 1024)
880 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
882 HTTPContext *s = h->priv_data;
885 if (!s->inflate_buffer) {
886 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
887 if (!s->inflate_buffer)
888 return AVERROR(ENOMEM);
891 if (s->inflate_stream.avail_in == 0) {
892 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
895 s->inflate_stream.next_in = s->inflate_buffer;
896 s->inflate_stream.avail_in = read;
899 s->inflate_stream.avail_out = size;
900 s->inflate_stream.next_out = buf;
902 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
903 if (ret != Z_OK && ret != Z_STREAM_END)
904 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
905 ret, s->inflate_stream.msg);
907 return size - s->inflate_stream.avail_out;
909 #endif /* CONFIG_ZLIB */
911 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
913 HTTPContext *s = h->priv_data;
914 int err, new_location;
919 if (s->end_chunked_post && !s->end_header) {
920 err = http_read_header(h, &new_location);
925 if (s->chunksize >= 0) {
930 if ((err = http_get_line(s, line, sizeof(line))) < 0)
932 } while (!*line); /* skip CR LF from last chunk */
934 s->chunksize = strtoll(line, NULL, 16);
936 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n",
942 size = FFMIN(size, s->chunksize);
946 return http_buf_read_compressed(h, buf, size);
947 #endif /* CONFIG_ZLIB */
948 return http_buf_read(h, buf, size);
951 // Like http_read_stream(), but no short reads.
952 // Assumes partial reads are an error.
953 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
957 int len = http_read_stream(h, buf + pos, size - pos);
965 static void update_metadata(HTTPContext *s, char *data)
974 val = strstr(key, "='");
977 end = strstr(val, "';");
985 av_dict_set(&s->metadata, key, val, 0);
991 static int store_icy(URLContext *h, int size)
993 HTTPContext *s = h->priv_data;
994 /* until next metadata packet */
995 int remaining = s->icy_metaint - s->icy_data_read;
998 return AVERROR_INVALIDDATA;
1001 /* The metadata packet is variable sized. It has a 1 byte header
1002 * which sets the length of the packet (divided by 16). If it's 0,
1003 * the metadata doesn't change. After the packet, icy_metaint bytes
1004 * of normal data follows. */
1006 int len = http_read_stream_all(h, &ch, 1);
1010 char data[255 * 16 + 1];
1013 ret = http_read_stream_all(h, data, len);
1017 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1019 update_metadata(s, data);
1021 s->icy_data_read = 0;
1022 remaining = s->icy_metaint;
1025 return FFMIN(size, remaining);
1028 static int http_read(URLContext *h, uint8_t *buf, int size)
1030 HTTPContext *s = h->priv_data;
1032 if (s->icy_metaint > 0) {
1033 size = store_icy(h, size);
1038 size = http_read_stream(h, buf, size);
1040 s->icy_data_read += size;
1044 /* used only when posting data */
1045 static int http_write(URLContext *h, const uint8_t *buf, int size)
1047 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1049 char crlf[] = "\r\n";
1050 HTTPContext *s = h->priv_data;
1052 if (!s->chunked_post) {
1053 /* non-chunked data is sent without any special encoding */
1054 return ffurl_write(s->hd, buf, size);
1057 /* silently ignore zero-size data since chunk encoding that would
1060 /* upload data using chunked encoding */
1061 snprintf(temp, sizeof(temp), "%x\r\n", size);
1063 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1064 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1065 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1071 static int http_shutdown(URLContext *h, int flags)
1074 char footer[] = "0\r\n\r\n";
1075 HTTPContext *s = h->priv_data;
1077 /* signal end of chunked encoding if used */
1078 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1079 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1080 ret = ret > 0 ? 0 : ret;
1081 s->end_chunked_post = 1;
1087 static int http_close(URLContext *h)
1090 HTTPContext *s = h->priv_data;
1093 inflateEnd(&s->inflate_stream);
1094 av_freep(&s->inflate_buffer);
1095 #endif /* CONFIG_ZLIB */
1097 if (!s->end_chunked_post)
1098 /* Close the write direction by sending the end of chunked encoding. */
1099 ret = http_shutdown(h, h->flags);
1102 ffurl_closep(&s->hd);
1103 av_dict_free(&s->chained_options);
1107 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1109 HTTPContext *s = h->priv_data;
1110 URLContext *old_hd = s->hd;
1111 int64_t old_off = s->off;
1112 uint8_t old_buf[BUFFER_SIZE];
1113 int old_buf_size, ret;
1114 AVDictionary *options = NULL;
1116 if (whence == AVSEEK_SIZE)
1118 else if ((whence == SEEK_CUR && off == 0) ||
1119 (whence == SEEK_SET && off == s->off))
1121 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1122 return AVERROR(ENOSYS);
1124 if (whence == SEEK_CUR)
1126 else if (whence == SEEK_END)
1128 else if (whence != SEEK_SET)
1129 return AVERROR(EINVAL);
1131 return AVERROR(EINVAL);
1134 /* we save the old context in case the seek fails */
1135 old_buf_size = s->buf_end - s->buf_ptr;
1136 memcpy(old_buf, s->buf_ptr, old_buf_size);
1139 /* if it fails, continue on old connection */
1140 if ((ret = http_open_cnx(h, &options)) < 0) {
1141 av_dict_free(&options);
1142 memcpy(s->buffer, old_buf, old_buf_size);
1143 s->buf_ptr = s->buffer;
1144 s->buf_end = s->buffer + old_buf_size;
1149 av_dict_free(&options);
1150 ffurl_close(old_hd);
1154 static int http_get_file_handle(URLContext *h)
1156 HTTPContext *s = h->priv_data;
1157 return ffurl_get_file_handle(s->hd);
1160 #define HTTP_CLASS(flavor) \
1161 static const AVClass flavor ## _context_class = { \
1162 .class_name = # flavor, \
1163 .item_name = av_default_item_name, \
1164 .option = options, \
1165 .version = LIBAVUTIL_VERSION_INT, \
1168 #if CONFIG_HTTP_PROTOCOL
1171 URLProtocol ff_http_protocol = {
1173 .url_open2 = http_open,
1174 .url_read = http_read,
1175 .url_write = http_write,
1176 .url_seek = http_seek,
1177 .url_close = http_close,
1178 .url_get_file_handle = http_get_file_handle,
1179 .url_shutdown = http_shutdown,
1180 .priv_data_size = sizeof(HTTPContext),
1181 .priv_data_class = &http_context_class,
1182 .flags = URL_PROTOCOL_FLAG_NETWORK,
1184 #endif /* CONFIG_HTTP_PROTOCOL */
1186 #if CONFIG_HTTPS_PROTOCOL
1189 URLProtocol ff_https_protocol = {
1191 .url_open2 = http_open,
1192 .url_read = http_read,
1193 .url_write = http_write,
1194 .url_seek = http_seek,
1195 .url_close = http_close,
1196 .url_get_file_handle = http_get_file_handle,
1197 .url_shutdown = http_shutdown,
1198 .priv_data_size = sizeof(HTTPContext),
1199 .priv_data_class = &https_context_class,
1200 .flags = URL_PROTOCOL_FLAG_NETWORK,
1202 #endif /* CONFIG_HTTPS_PROTOCOL */
1204 #if CONFIG_HTTPPROXY_PROTOCOL
1205 static int http_proxy_close(URLContext *h)
1207 HTTPContext *s = h->priv_data;
1209 ffurl_closep(&s->hd);
1213 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1215 HTTPContext *s = h->priv_data;
1216 char hostname[1024], hoststr[1024];
1217 char auth[1024], pathbuf[1024], *path;
1218 char lower_url[100];
1219 int port, ret = 0, attempts = 0;
1220 HTTPAuthType cur_auth_type;
1224 if( s->seekable == 1 )
1229 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1230 pathbuf, sizeof(pathbuf), uri);
1231 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1236 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1239 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1240 &h->interrupt_callback, NULL);
1244 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1246 snprintf(s->buffer, sizeof(s->buffer),
1247 "CONNECT %s HTTP/1.1\r\n"
1249 "Connection: close\r\n"
1254 authstr ? "Proxy-" : "", authstr ? authstr : "");
1257 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1260 s->buf_ptr = s->buffer;
1261 s->buf_end = s->buffer;
1264 cur_auth_type = s->proxy_auth_state.auth_type;
1266 /* Note: This uses buffering, potentially reading more than the
1267 * HTTP header. If tunneling a protocol where the server starts
1268 * the conversation, we might buffer part of that here, too.
1269 * Reading that requires using the proper ffurl_read() function
1270 * on this URLContext, not using the fd directly (as the tls
1271 * protocol does). This shouldn't be an issue for tls though,
1272 * since the client starts the conversation there, so there
1273 * is no extra data that we might buffer up here.
1275 ret = http_read_header(h, &new_loc);
1280 if (s->http_code == 407 &&
1281 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1282 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1283 ffurl_closep(&s->hd);
1287 if (s->http_code < 400)
1289 ret = ff_http_averror(s->http_code, AVERROR(EIO));
1292 http_proxy_close(h);
1296 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1298 HTTPContext *s = h->priv_data;
1299 return ffurl_write(s->hd, buf, size);
1302 URLProtocol ff_httpproxy_protocol = {
1303 .name = "httpproxy",
1304 .url_open = http_proxy_open,
1305 .url_read = http_buf_read,
1306 .url_write = http_proxy_write,
1307 .url_close = http_proxy_close,
1308 .url_get_file_handle = http_get_file_handle,
1309 .priv_data_size = sizeof(HTTPContext),
1310 .flags = URL_PROTOCOL_FLAG_NETWORK,
1312 #endif /* CONFIG_HTTPPROXY_PROTOCOL */