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
48 typedef struct HTTPContext {
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;
99 #define OFFSET(x) offsetof(HTTPContext, x)
100 #define D AV_OPT_FLAG_DECODING_PARAM
101 #define E AV_OPT_FLAG_ENCODING_PARAM
102 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
104 static const AVOption options[] = {
105 { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D },
106 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
107 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
108 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
109 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
110 { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
111 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
112 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
113 { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
114 { "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 },
115 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
116 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
117 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
118 { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
119 { "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"},
120 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
121 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
122 { "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 },
123 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
124 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
125 { "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 },
126 { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
127 { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D },
131 static int http_connect(URLContext *h, const char *path, const char *local_path,
132 const char *hoststr, const char *auth,
133 const char *proxyauth, int *new_location);
135 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
137 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
138 &((HTTPContext *)src->priv_data)->auth_state,
139 sizeof(HTTPAuthState));
140 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
141 &((HTTPContext *)src->priv_data)->proxy_auth_state,
142 sizeof(HTTPAuthState));
145 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
147 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
148 char hostname[1024], hoststr[1024], proto[10];
149 char auth[1024], proxyauth[1024] = "";
150 char path1[MAX_URL_SIZE];
151 char buf[1024], urlbuf[MAX_URL_SIZE];
152 int port, use_proxy, err, location_changed = 0;
153 HTTPContext *s = h->priv_data;
155 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
156 hostname, sizeof(hostname), &port,
157 path1, sizeof(path1), s->location);
158 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
160 proxy_path = getenv("http_proxy");
161 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
162 proxy_path && av_strstart(proxy_path, "http://", NULL);
164 if (!strcmp(proto, "https")) {
173 if (path1[0] == '\0')
179 /* Reassemble the request URL without auth string - we don't
180 * want to leak the auth to the proxy. */
181 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
184 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
185 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
188 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
191 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
192 &h->interrupt_callback, options);
197 err = http_connect(h, path, local_path, hoststr,
198 auth, proxyauth, &location_changed);
202 return location_changed;
205 /* return non zero if error */
206 static int http_open_cnx(URLContext *h, AVDictionary **options)
208 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
209 HTTPContext *s = h->priv_data;
210 int location_changed, attempts = 0, redirects = 0;
212 av_dict_copy(options, s->chained_options, 0);
214 cur_auth_type = s->auth_state.auth_type;
215 cur_proxy_auth_type = s->auth_state.auth_type;
217 location_changed = http_open_cnx_internal(h, options);
218 if (location_changed < 0)
222 if (s->http_code == 401) {
223 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
224 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
225 ffurl_closep(&s->hd);
230 if (s->http_code == 407) {
231 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
232 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
233 ffurl_closep(&s->hd);
238 if ((s->http_code == 301 || s->http_code == 302 ||
239 s->http_code == 303 || s->http_code == 307) &&
240 location_changed == 1) {
241 /* url moved, get next */
242 ffurl_closep(&s->hd);
243 if (redirects++ >= MAX_REDIRECTS)
245 /* Restart the authentication process with the new target, which
246 * might use a different auth mechanism. */
247 memset(&s->auth_state, 0, sizeof(s->auth_state));
249 location_changed = 0;
256 ffurl_closep(&s->hd);
257 if (location_changed < 0)
258 return location_changed;
259 return ff_http_averror(s->http_code, AVERROR(EIO));
262 int ff_http_do_new_request(URLContext *h, const char *uri)
264 HTTPContext *s = h->priv_data;
265 AVDictionary *options = NULL;
269 s->icy_data_read = 0;
270 av_free(s->location);
271 s->location = av_strdup(uri);
273 return AVERROR(ENOMEM);
275 ret = http_open_cnx(h, &options);
276 av_dict_free(&options);
280 int ff_http_averror(int status_code, int default_averror)
282 switch (status_code) {
283 case 400: return AVERROR_HTTP_BAD_REQUEST;
284 case 401: return AVERROR_HTTP_UNAUTHORIZED;
285 case 403: return AVERROR_HTTP_FORBIDDEN;
286 case 404: return AVERROR_HTTP_NOT_FOUND;
289 if (status_code >= 400 && status_code <= 499)
290 return AVERROR_HTTP_OTHER_4XX;
291 else if (status_code >= 500)
292 return AVERROR_HTTP_SERVER_ERROR;
294 return default_averror;
297 static int http_open(URLContext *h, const char *uri, int flags,
298 AVDictionary **options)
300 HTTPContext *s = h->priv_data;
303 if( s->seekable == 1 )
309 s->location = av_strdup(uri);
311 return AVERROR(ENOMEM);
313 av_dict_copy(&s->chained_options, *options, 0);
316 int len = strlen(s->headers);
317 if (len < 2 || strcmp("\r\n", s->headers + len - 2))
318 av_log(h, AV_LOG_WARNING,
319 "No trailing CRLF found in HTTP header.\n");
322 ret = http_open_cnx(h, options);
324 av_dict_free(&s->chained_options);
328 static int http_getc(HTTPContext *s)
331 if (s->buf_ptr >= s->buf_end) {
332 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
335 } else if (len == 0) {
338 s->buf_ptr = s->buffer;
339 s->buf_end = s->buffer + len;
342 return *s->buf_ptr++;
345 static int http_get_line(HTTPContext *s, char *line, int line_size)
357 if (q > line && q[-1] == '\r')
363 if ((q - line) < line_size - 1)
369 static int check_http_code(URLContext *h, int http_code, const char *end)
371 HTTPContext *s = h->priv_data;
372 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
373 * don't abort until all headers have been parsed. */
374 if (http_code >= 400 && http_code < 600 &&
375 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
376 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
377 end += strspn(end, SPACE_CHARS);
378 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
379 return ff_http_averror(http_code, AVERROR(EIO));
384 static int parse_location(HTTPContext *s, const char *p)
386 char redirected_location[MAX_URL_SIZE], *new_loc;
387 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
389 new_loc = av_strdup(redirected_location);
391 return AVERROR(ENOMEM);
392 av_free(s->location);
393 s->location = new_loc;
397 /* "bytes $from-$to/$document_size" */
398 static void parse_content_range(URLContext *h, const char *p)
400 HTTPContext *s = h->priv_data;
403 if (!strncmp(p, "bytes ", 6)) {
405 s->off = strtoll(p, NULL, 10);
406 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
407 s->filesize = strtoll(slash + 1, NULL, 10);
409 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
410 h->is_streamed = 0; /* we _can_ in fact seek */
413 static int parse_content_encoding(URLContext *h, const char *p)
415 if (!av_strncasecmp(p, "gzip", 4) ||
416 !av_strncasecmp(p, "deflate", 7)) {
418 HTTPContext *s = h->priv_data;
421 inflateEnd(&s->inflate_stream);
422 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
423 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
424 s->inflate_stream.msg);
425 return AVERROR(ENOSYS);
427 if (zlibCompileFlags() & (1 << 17)) {
428 av_log(h, AV_LOG_WARNING,
429 "Your zlib was compiled without gzip support.\n");
430 return AVERROR(ENOSYS);
433 av_log(h, AV_LOG_WARNING,
434 "Compressed (%s) content, need zlib with gzip support\n", p);
435 return AVERROR(ENOSYS);
436 #endif /* CONFIG_ZLIB */
437 } else if (!av_strncasecmp(p, "identity", 8)) {
438 // The normal, no-encoding case (although servers shouldn't include
439 // the header at all if this is the case).
441 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
446 // Concat all Icy- header lines
447 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
449 int len = 4 + strlen(p) + strlen(tag);
450 int is_first = !s->icy_metadata_headers;
453 av_dict_set(&s->metadata, tag, p, 0);
455 if (s->icy_metadata_headers)
456 len += strlen(s->icy_metadata_headers);
458 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
462 *s->icy_metadata_headers = '\0';
464 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
469 static int process_line(URLContext *h, char *line, int line_count,
472 HTTPContext *s = h->priv_data;
477 if (line[0] == '\0') {
483 if (line_count == 0) {
484 while (!av_isspace(*p) && *p != '\0')
486 while (av_isspace(*p))
488 s->http_code = strtol(p, &end, 10);
490 av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code);
492 if ((ret = check_http_code(h, s->http_code, end)) < 0)
495 while (*p != '\0' && *p != ':')
503 while (av_isspace(*p))
505 if (!av_strcasecmp(tag, "Location")) {
506 if ((ret = parse_location(s, p)) < 0)
509 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
510 s->filesize = strtoll(p, NULL, 10);
511 } else if (!av_strcasecmp(tag, "Content-Range")) {
512 parse_content_range(h, p);
513 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
514 !strncmp(p, "bytes", 5) &&
517 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
518 !av_strncasecmp(p, "chunked", 7)) {
521 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
522 ff_http_auth_handle_header(&s->auth_state, tag, p);
523 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
524 ff_http_auth_handle_header(&s->auth_state, tag, p);
525 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
526 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
527 } else if (!av_strcasecmp(tag, "Connection")) {
528 if (!strcmp(p, "close"))
530 } else if (!av_strcasecmp(tag, "Server")) {
531 if (!av_strcasecmp(p, "AkamaiGHost")) {
533 } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
534 s->is_mediagateway = 1;
536 } else if (!av_strcasecmp(tag, "Content-Type")) {
537 av_free(s->mime_type);
538 s->mime_type = av_strdup(p);
539 } else if (!av_strcasecmp(tag, "Set-Cookie")) {
541 if (!(s->cookies = av_strdup(p)))
542 return AVERROR(ENOMEM);
544 char *tmp = s->cookies;
545 size_t str_size = strlen(tmp) + strlen(p) + 2;
546 if (!(s->cookies = av_malloc(str_size))) {
548 return AVERROR(ENOMEM);
550 snprintf(s->cookies, str_size, "%s\n%s", tmp, p);
553 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
554 s->icy_metaint = strtoll(p, NULL, 10);
555 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
556 if ((ret = parse_icy(s, tag, p)) < 0)
558 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
559 if ((ret = parse_content_encoding(h, p)) < 0)
567 * Create a string containing cookie values for use as a HTTP cookie header
568 * field value for a particular path and domain from the cookie values stored in
569 * the HTTP protocol context. The cookie string is stored in *cookies.
571 * @return a negative value if an error condition occurred, 0 otherwise
573 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
576 // cookie strings will look like Set-Cookie header field values. Multiple
577 // Set-Cookie fields will result in multiple values delimited by a newline
579 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
581 if (!set_cookies) return AVERROR(EINVAL);
584 while ((cookie = av_strtok(set_cookies, "\n", &next))) {
585 int domain_offset = 0;
586 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
589 while ((param = av_strtok(cookie, "; ", &next_param))) {
591 // first key-value pair is the actual cookie value
592 cvalue = av_strdup(param);
594 } else if (!av_strncasecmp("path=", param, 5)) {
596 cpath = av_strdup(¶m[5]);
597 } else if (!av_strncasecmp("domain=", param, 7)) {
598 // if the cookie specifies a sub-domain, skip the leading dot thereby
599 // supporting URLs that point to sub-domains and the master domain
600 int leading_dot = (param[7] == '.');
602 cdomain = av_strdup(¶m[7+leading_dot]);
604 // ignore unknown attributes
608 cdomain = av_strdup(domain);
610 // ensure all of the necessary values are valid
611 if (!cdomain || !cpath || !cvalue) {
612 av_log(s, AV_LOG_WARNING,
613 "Invalid cookie found, no value, path or domain specified\n");
617 // check if the request path matches the cookie path
618 if (av_strncasecmp(path, cpath, strlen(cpath)))
621 // the domain should be at least the size of our cookie domain
622 domain_offset = strlen(domain) - strlen(cdomain);
623 if (domain_offset < 0)
626 // match the cookie domain
627 if (av_strcasecmp(&domain[domain_offset], cdomain))
630 // cookie parameters match, so copy the value
632 if (!(*cookies = av_strdup(cvalue))) {
633 ret = AVERROR(ENOMEM);
637 char *tmp = *cookies;
638 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
639 if (!(*cookies = av_malloc(str_size))) {
640 ret = AVERROR(ENOMEM);
643 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
652 if (*cookies) av_freep(cookies);
653 av_free(cset_cookies);
658 av_free(cset_cookies);
663 static inline int has_header(const char *str, const char *header)
665 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
668 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
671 static int http_read_header(URLContext *h, int *new_location)
673 HTTPContext *s = h->priv_data;
674 char line[MAX_URL_SIZE];
680 if ((err = http_get_line(s, line, sizeof(line))) < 0)
683 av_log(h, AV_LOG_DEBUG, "header='%s'\n", line);
685 err = process_line(h, line, s->line_count, new_location);
693 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
694 h->is_streamed = 1; /* we can in fact _not_ seek */
699 static int http_connect(URLContext *h, const char *path, const char *local_path,
700 const char *hoststr, const char *auth,
701 const char *proxyauth, int *new_location)
703 HTTPContext *s = h->priv_data;
705 char headers[HTTP_HEADERS_SIZE] = "";
706 char *authstr = NULL, *proxyauthstr = NULL;
707 int64_t off = s->off;
710 int send_expect_100 = 0;
712 /* send http header */
713 post = h->flags & AVIO_FLAG_WRITE;
716 /* force POST method and disable chunked encoding when
717 * custom HTTP post data is set */
725 method = post ? "POST" : "GET";
727 authstr = ff_http_auth_create_response(&s->auth_state, auth,
729 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
731 if (post && !s->post_data) {
732 send_expect_100 = s->send_expect_100;
733 /* The user has supplied authentication but we don't know the auth type,
734 * send Expect: 100-continue to get the 401 response including the
735 * WWW-Authenticate header, or an 100 continue if no auth actually
738 s->auth_state.auth_type == HTTP_AUTH_NONE &&
743 /* set default headers if needed */
744 if (!has_header(s->headers, "\r\nUser-Agent: "))
745 len += av_strlcatf(headers + len, sizeof(headers) - len,
746 "User-Agent: %s\r\n", s->user_agent);
747 if (!has_header(s->headers, "\r\nAccept: "))
748 len += av_strlcpy(headers + len, "Accept: */*\r\n",
749 sizeof(headers) - len);
750 // Note: we send this on purpose even when s->off is 0 when we're probing,
751 // since it allows us to detect more reliably if a (non-conforming)
752 // server supports seeking by analysing the reply headers.
753 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
754 len += av_strlcatf(headers + len, sizeof(headers) - len,
755 "Range: bytes=%"PRId64"-", s->off);
757 len += av_strlcatf(headers + len, sizeof(headers) - len,
758 "%"PRId64, s->end_off - 1);
759 len += av_strlcpy(headers + len, "\r\n",
760 sizeof(headers) - len);
762 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
763 len += av_strlcatf(headers + len, sizeof(headers) - len,
764 "Expect: 100-continue\r\n");
766 if (!has_header(s->headers, "\r\nConnection: ")) {
767 if (s->multiple_requests)
768 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
769 sizeof(headers) - len);
771 len += av_strlcpy(headers + len, "Connection: close\r\n",
772 sizeof(headers) - len);
775 if (!has_header(s->headers, "\r\nHost: "))
776 len += av_strlcatf(headers + len, sizeof(headers) - len,
777 "Host: %s\r\n", hoststr);
778 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
779 len += av_strlcatf(headers + len, sizeof(headers) - len,
780 "Content-Length: %d\r\n", s->post_datalen);
782 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
783 len += av_strlcatf(headers + len, sizeof(headers) - len,
784 "Content-Type: %s\r\n", s->content_type);
785 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
786 char *cookies = NULL;
787 if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
788 len += av_strlcatf(headers + len, sizeof(headers) - len,
789 "Cookie: %s\r\n", cookies);
793 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
794 len += av_strlcatf(headers + len, sizeof(headers) - len,
795 "Icy-MetaData: %d\r\n", 1);
797 /* now add in custom headers */
799 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
801 snprintf(s->buffer, sizeof(s->buffer),
810 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
812 authstr ? authstr : "",
813 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
815 av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
817 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
821 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
824 /* init input buffer */
825 s->buf_ptr = s->buffer;
826 s->buf_end = s->buffer;
829 s->icy_data_read = 0;
832 s->end_chunked_post = 0;
834 if (post && !s->post_data && !send_expect_100) {
835 /* Pretend that it did work. We didn't read any header yet, since
836 * we've still to send the POST data, but the code calling this
837 * function will check http_code after we return. */
843 /* wait for header */
844 err = http_read_header(h, new_location);
848 err = (off == s->off) ? 0 : -1;
851 av_freep(&proxyauthstr);
855 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
857 HTTPContext *s = h->priv_data;
859 /* read bytes from input buffer first */
860 len = s->buf_end - s->buf_ptr;
864 memcpy(buf, s->buf_ptr, len);
867 if ((!s->willclose || s->chunksize < 0) &&
868 s->filesize >= 0 && s->off >= s->filesize)
870 len = ffurl_read(s->hd, buf, size);
874 if (s->chunksize > 0)
881 #define DECOMPRESS_BUF_SIZE (256 * 1024)
882 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
884 HTTPContext *s = h->priv_data;
887 if (!s->inflate_buffer) {
888 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
889 if (!s->inflate_buffer)
890 return AVERROR(ENOMEM);
893 if (s->inflate_stream.avail_in == 0) {
894 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
897 s->inflate_stream.next_in = s->inflate_buffer;
898 s->inflate_stream.avail_in = read;
901 s->inflate_stream.avail_out = size;
902 s->inflate_stream.next_out = buf;
904 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
905 if (ret != Z_OK && ret != Z_STREAM_END)
906 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
907 ret, s->inflate_stream.msg);
909 return size - s->inflate_stream.avail_out;
911 #endif /* CONFIG_ZLIB */
913 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
915 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
917 HTTPContext *s = h->priv_data;
918 int err, new_location, read_ret, seek_ret;
923 if (s->end_chunked_post && !s->end_header) {
924 err = http_read_header(h, &new_location);
929 if (s->chunksize >= 0) {
934 if ((err = http_get_line(s, line, sizeof(line))) < 0)
936 } while (!*line); /* skip CR LF from last chunk */
938 s->chunksize = strtoll(line, NULL, 16);
940 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n",
946 size = FFMIN(size, s->chunksize);
950 return http_buf_read_compressed(h, buf, size);
951 #endif /* CONFIG_ZLIB */
952 read_ret = http_buf_read(h, buf, size);
953 if (read_ret < 0 && s->reconnect && !h->is_streamed && s->filesize > 0 && s->off < s->filesize) {
954 av_log(h, AV_LOG_INFO, "Will reconnect at %"PRId64".\n", s->off);
955 seek_ret = http_seek_internal(h, s->off, SEEK_SET, 1);
956 if (seek_ret != s->off) {
957 av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRId64".\n", s->off);
961 read_ret = http_buf_read(h, buf, size);
967 // Like http_read_stream(), but no short reads.
968 // Assumes partial reads are an error.
969 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
973 int len = http_read_stream(h, buf + pos, size - pos);
981 static void update_metadata(HTTPContext *s, char *data)
990 val = strstr(key, "='");
993 end = strstr(val, "';");
1001 av_dict_set(&s->metadata, key, val, 0);
1007 static int store_icy(URLContext *h, int size)
1009 HTTPContext *s = h->priv_data;
1010 /* until next metadata packet */
1011 int remaining = s->icy_metaint - s->icy_data_read;
1014 return AVERROR_INVALIDDATA;
1017 /* The metadata packet is variable sized. It has a 1 byte header
1018 * which sets the length of the packet (divided by 16). If it's 0,
1019 * the metadata doesn't change. After the packet, icy_metaint bytes
1020 * of normal data follows. */
1022 int len = http_read_stream_all(h, &ch, 1);
1026 char data[255 * 16 + 1];
1029 ret = http_read_stream_all(h, data, len);
1033 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1035 update_metadata(s, data);
1037 s->icy_data_read = 0;
1038 remaining = s->icy_metaint;
1041 return FFMIN(size, remaining);
1044 static int http_read(URLContext *h, uint8_t *buf, int size)
1046 HTTPContext *s = h->priv_data;
1048 if (s->icy_metaint > 0) {
1049 size = store_icy(h, size);
1054 size = http_read_stream(h, buf, size);
1056 s->icy_data_read += size;
1060 /* used only when posting data */
1061 static int http_write(URLContext *h, const uint8_t *buf, int size)
1063 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1065 char crlf[] = "\r\n";
1066 HTTPContext *s = h->priv_data;
1068 if (!s->chunked_post) {
1069 /* non-chunked data is sent without any special encoding */
1070 return ffurl_write(s->hd, buf, size);
1073 /* silently ignore zero-size data since chunk encoding that would
1076 /* upload data using chunked encoding */
1077 snprintf(temp, sizeof(temp), "%x\r\n", size);
1079 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1080 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1081 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1087 static int http_shutdown(URLContext *h, int flags)
1090 char footer[] = "0\r\n\r\n";
1091 HTTPContext *s = h->priv_data;
1093 /* signal end of chunked encoding if used */
1094 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1095 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1096 ret = ret > 0 ? 0 : ret;
1097 s->end_chunked_post = 1;
1103 static int http_close(URLContext *h)
1106 HTTPContext *s = h->priv_data;
1109 inflateEnd(&s->inflate_stream);
1110 av_freep(&s->inflate_buffer);
1111 #endif /* CONFIG_ZLIB */
1113 if (!s->end_chunked_post)
1114 /* Close the write direction by sending the end of chunked encoding. */
1115 ret = http_shutdown(h, h->flags);
1118 ffurl_closep(&s->hd);
1119 av_dict_free(&s->chained_options);
1123 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1125 HTTPContext *s = h->priv_data;
1126 URLContext *old_hd = s->hd;
1127 int64_t old_off = s->off;
1128 uint8_t old_buf[BUFFER_SIZE];
1129 int old_buf_size, ret;
1130 AVDictionary *options = NULL;
1132 if (whence == AVSEEK_SIZE)
1134 else if (!force_reconnect &&
1135 ((whence == SEEK_CUR && off == 0) ||
1136 (whence == SEEK_SET && off == s->off)))
1138 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1139 return AVERROR(ENOSYS);
1141 if (whence == SEEK_CUR)
1143 else if (whence == SEEK_END)
1145 else if (whence != SEEK_SET)
1146 return AVERROR(EINVAL);
1148 return AVERROR(EINVAL);
1151 /* we save the old context in case the seek fails */
1152 old_buf_size = s->buf_end - s->buf_ptr;
1153 memcpy(old_buf, s->buf_ptr, old_buf_size);
1156 /* if it fails, continue on old connection */
1157 if ((ret = http_open_cnx(h, &options)) < 0) {
1158 av_dict_free(&options);
1159 memcpy(s->buffer, old_buf, old_buf_size);
1160 s->buf_ptr = s->buffer;
1161 s->buf_end = s->buffer + old_buf_size;
1166 av_dict_free(&options);
1167 ffurl_close(old_hd);
1171 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1173 return http_seek_internal(h, off, whence, 0);
1176 static int http_get_file_handle(URLContext *h)
1178 HTTPContext *s = h->priv_data;
1179 return ffurl_get_file_handle(s->hd);
1182 #define HTTP_CLASS(flavor) \
1183 static const AVClass flavor ## _context_class = { \
1184 .class_name = # flavor, \
1185 .item_name = av_default_item_name, \
1186 .option = options, \
1187 .version = LIBAVUTIL_VERSION_INT, \
1190 #if CONFIG_HTTP_PROTOCOL
1193 URLProtocol ff_http_protocol = {
1195 .url_open2 = http_open,
1196 .url_read = http_read,
1197 .url_write = http_write,
1198 .url_seek = http_seek,
1199 .url_close = http_close,
1200 .url_get_file_handle = http_get_file_handle,
1201 .url_shutdown = http_shutdown,
1202 .priv_data_size = sizeof(HTTPContext),
1203 .priv_data_class = &http_context_class,
1204 .flags = URL_PROTOCOL_FLAG_NETWORK,
1206 #endif /* CONFIG_HTTP_PROTOCOL */
1208 #if CONFIG_HTTPS_PROTOCOL
1211 URLProtocol ff_https_protocol = {
1213 .url_open2 = http_open,
1214 .url_read = http_read,
1215 .url_write = http_write,
1216 .url_seek = http_seek,
1217 .url_close = http_close,
1218 .url_get_file_handle = http_get_file_handle,
1219 .url_shutdown = http_shutdown,
1220 .priv_data_size = sizeof(HTTPContext),
1221 .priv_data_class = &https_context_class,
1222 .flags = URL_PROTOCOL_FLAG_NETWORK,
1224 #endif /* CONFIG_HTTPS_PROTOCOL */
1226 #if CONFIG_HTTPPROXY_PROTOCOL
1227 static int http_proxy_close(URLContext *h)
1229 HTTPContext *s = h->priv_data;
1231 ffurl_closep(&s->hd);
1235 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1237 HTTPContext *s = h->priv_data;
1238 char hostname[1024], hoststr[1024];
1239 char auth[1024], pathbuf[1024], *path;
1240 char lower_url[100];
1241 int port, ret = 0, attempts = 0;
1242 HTTPAuthType cur_auth_type;
1246 if( s->seekable == 1 )
1251 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1252 pathbuf, sizeof(pathbuf), uri);
1253 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1258 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1261 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1262 &h->interrupt_callback, NULL);
1266 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1268 snprintf(s->buffer, sizeof(s->buffer),
1269 "CONNECT %s HTTP/1.1\r\n"
1271 "Connection: close\r\n"
1276 authstr ? "Proxy-" : "", authstr ? authstr : "");
1279 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1282 s->buf_ptr = s->buffer;
1283 s->buf_end = s->buffer;
1286 cur_auth_type = s->proxy_auth_state.auth_type;
1288 /* Note: This uses buffering, potentially reading more than the
1289 * HTTP header. If tunneling a protocol where the server starts
1290 * the conversation, we might buffer part of that here, too.
1291 * Reading that requires using the proper ffurl_read() function
1292 * on this URLContext, not using the fd directly (as the tls
1293 * protocol does). This shouldn't be an issue for tls though,
1294 * since the client starts the conversation there, so there
1295 * is no extra data that we might buffer up here.
1297 ret = http_read_header(h, &new_loc);
1302 if (s->http_code == 407 &&
1303 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1304 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1305 ffurl_closep(&s->hd);
1309 if (s->http_code < 400)
1311 ret = ff_http_averror(s->http_code, AVERROR(EIO));
1314 http_proxy_close(h);
1318 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1320 HTTPContext *s = h->priv_data;
1321 return ffurl_write(s->hd, buf, size);
1324 URLProtocol ff_httpproxy_protocol = {
1325 .name = "httpproxy",
1326 .url_open = http_proxy_open,
1327 .url_read = http_buf_read,
1328 .url_write = http_proxy_write,
1329 .url_close = http_proxy_close,
1330 .url_get_file_handle = http_get_file_handle,
1331 .priv_data_size = sizeof(HTTPContext),
1332 .flags = URL_PROTOCOL_FLAG_NETWORK,
1334 #endif /* CONFIG_HTTPPROXY_PROTOCOL */