2 * HTTP protocol for avconv client
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 avconv 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. */
68 /* A flag which indicates if the end of chunked encoding has been sent. */
70 /* A flag which indicates we have finished to read POST reply. */
72 /* A flag which indicates if we use persistent connections. */
73 int multiple_requests;
77 /* how much data was read since the last ICY metadata packet */
79 /* after how many bytes of read data a new metadata packet will be found */
81 char *icy_metadata_headers;
82 char *icy_metadata_packet;
83 AVDictionary *metadata;
86 z_stream inflate_stream;
87 uint8_t *inflate_buffer;
88 #endif /* CONFIG_ZLIB */
89 AVDictionary *chained_options;
94 #define OFFSET(x) offsetof(HTTPContext, x)
95 #define D AV_OPT_FLAG_DECODING_PARAM
96 #define E AV_OPT_FLAG_ENCODING_PARAM
97 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
99 static const AVOption options[] = {
100 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
101 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
102 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
103 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
104 { "user-agent", "override User-Agent header, for compatibility with ffmpeg", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
105 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
106 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
107 { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
108 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
109 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
110 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
111 { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
112 { "auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, { .i64 = HTTP_AUTH_NONE }, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D | E, "auth_type"},
113 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
114 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
115 { "send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
116 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
117 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
118 { "end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
119 { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
123 static int http_connect(URLContext *h, const char *path, const char *local_path,
124 const char *hoststr, const char *auth,
125 const char *proxyauth, int *new_location);
127 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
129 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
130 &((HTTPContext *)src->priv_data)->auth_state,
131 sizeof(HTTPAuthState));
132 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
133 &((HTTPContext *)src->priv_data)->proxy_auth_state,
134 sizeof(HTTPAuthState));
137 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
139 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
140 char hostname[1024], hoststr[1024], proto[10];
141 char auth[1024], proxyauth[1024] = "";
142 char path1[MAX_URL_SIZE];
143 char buf[1024], urlbuf[MAX_URL_SIZE];
144 int port, use_proxy, err, location_changed = 0;
145 HTTPContext *s = h->priv_data;
147 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
148 hostname, sizeof(hostname), &port,
149 path1, sizeof(path1), s->location);
150 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
152 proxy_path = getenv("http_proxy");
153 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
154 proxy_path && av_strstart(proxy_path, "http://", NULL);
156 if (!strcmp(proto, "https")) {
165 if (path1[0] == '\0')
171 /* Reassemble the request URL without auth string - we don't
172 * want to leak the auth to the proxy. */
173 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
176 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
177 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
180 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
183 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
184 &h->interrupt_callback, options, h->protocols, h);
189 err = http_connect(h, path, local_path, hoststr,
190 auth, proxyauth, &location_changed);
194 return location_changed;
197 /* return non zero if error */
198 static int http_open_cnx(URLContext *h, AVDictionary **options)
200 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
201 HTTPContext *s = h->priv_data;
202 int location_changed, attempts = 0, redirects = 0;
204 cur_auth_type = s->auth_state.auth_type;
205 cur_proxy_auth_type = s->auth_state.auth_type;
207 location_changed = http_open_cnx_internal(h, options);
208 if (location_changed < 0)
212 if (s->http_code == 401) {
213 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
214 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
221 if (s->http_code == 407) {
222 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
223 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
230 if ((s->http_code == 301 || s->http_code == 302 ||
231 s->http_code == 303 || s->http_code == 307) &&
232 location_changed == 1) {
233 /* url moved, get next */
236 if (redirects++ >= MAX_REDIRECTS)
238 /* Restart the authentication process with the new target, which
239 * might use a different auth mechanism. */
240 memset(&s->auth_state, 0, sizeof(s->auth_state));
242 location_changed = 0;
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;
282 s->location = av_strdup(uri);
284 return AVERROR(ENOMEM);
286 av_dict_copy(&s->chained_options, *options, 0);
289 int len = strlen(s->headers);
290 if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
291 av_log(h, AV_LOG_WARNING,
292 "No trailing CRLF found in HTTP header.\n");
293 ret = av_reallocp(&s->headers, len + 3);
296 s->headers[len] = '\r';
297 s->headers[len + 1] = '\n';
298 s->headers[len + 2] = '\0';
302 ret = http_open_cnx(h, options);
304 av_dict_free(&s->chained_options);
308 static int http_getc(HTTPContext *s)
311 if (s->buf_ptr >= s->buf_end) {
312 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
315 } else if (len == 0) {
318 s->buf_ptr = s->buffer;
319 s->buf_end = s->buffer + len;
322 return *s->buf_ptr++;
325 static int http_get_line(HTTPContext *s, char *line, int line_size)
337 if (q > line && q[-1] == '\r')
343 if ((q - line) < line_size - 1)
349 static int check_http_code(URLContext *h, int http_code, const char *end)
351 HTTPContext *s = h->priv_data;
352 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
353 * don't abort until all headers have been parsed. */
354 if (http_code >= 400 && http_code < 600 &&
355 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
356 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
357 end += strspn(end, SPACE_CHARS);
358 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
364 static int parse_location(HTTPContext *s, const char *p)
366 char redirected_location[MAX_URL_SIZE], *new_loc;
367 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
369 new_loc = av_strdup(redirected_location);
371 return AVERROR(ENOMEM);
372 av_free(s->location);
373 s->location = new_loc;
377 /* "bytes $from-$to/$document_size" */
378 static void parse_content_range(URLContext *h, const char *p)
380 HTTPContext *s = h->priv_data;
383 if (!strncmp(p, "bytes ", 6)) {
385 s->off = strtoll(p, NULL, 10);
386 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
387 s->filesize = strtoll(slash + 1, NULL, 10);
389 h->is_streamed = 0; /* we _can_ in fact seek */
392 static int parse_content_encoding(URLContext *h, const char *p)
394 if (!av_strncasecmp(p, "gzip", 4) ||
395 !av_strncasecmp(p, "deflate", 7)) {
397 HTTPContext *s = h->priv_data;
400 inflateEnd(&s->inflate_stream);
401 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
402 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
403 s->inflate_stream.msg);
404 return AVERROR(ENOSYS);
406 if (zlibCompileFlags() & (1 << 17)) {
407 av_log(h, AV_LOG_WARNING,
408 "Your zlib was compiled without gzip support.\n");
409 return AVERROR(ENOSYS);
412 av_log(h, AV_LOG_WARNING,
413 "Compressed (%s) content, need zlib with gzip support\n", p);
414 return AVERROR(ENOSYS);
415 #endif /* CONFIG_ZLIB */
416 } else if (!av_strncasecmp(p, "identity", 8)) {
417 // The normal, no-encoding case (although servers shouldn't include
418 // the header at all if this is the case).
420 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
421 return AVERROR(ENOSYS);
426 // Concat all Icy- header lines
427 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
429 int len = 4 + strlen(p) + strlen(tag);
430 int is_first = !s->icy_metadata_headers;
433 av_dict_set(&s->metadata, tag, p, 0);
435 if (s->icy_metadata_headers)
436 len += strlen(s->icy_metadata_headers);
438 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
442 *s->icy_metadata_headers = '\0';
444 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
449 static int process_line(URLContext *h, char *line, int line_count,
452 HTTPContext *s = h->priv_data;
457 if (line[0] == '\0') {
463 if (line_count == 0) {
464 while (!av_isspace(*p) && *p != '\0')
466 while (av_isspace(*p))
468 s->http_code = strtol(p, &end, 10);
470 av_log(NULL, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
472 if ((ret = check_http_code(h, s->http_code, end)) < 0)
475 while (*p != '\0' && *p != ':')
483 while (av_isspace(*p))
485 if (!av_strcasecmp(tag, "Location")) {
486 if ((ret = parse_location(s, p)) < 0)
489 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
490 s->filesize = strtoll(p, NULL, 10);
491 } else if (!av_strcasecmp(tag, "Content-Range")) {
492 parse_content_range(h, p);
493 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
494 !strncmp(p, "bytes", 5)) {
496 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
497 !av_strncasecmp(p, "chunked", 7)) {
500 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
501 ff_http_auth_handle_header(&s->auth_state, tag, p);
502 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
503 ff_http_auth_handle_header(&s->auth_state, tag, p);
504 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
505 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
506 } else if (!av_strcasecmp(tag, "Connection")) {
507 if (!strcmp(p, "close"))
509 } else if (!av_strcasecmp(tag, "Content-Type")) {
510 av_free(s->mime_type);
511 s->mime_type = av_strdup(p);
512 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
513 s->icy_metaint = strtoll(p, NULL, 10);
514 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
515 if ((ret = parse_icy(s, tag, p)) < 0)
517 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
518 if ((ret = parse_content_encoding(h, p)) < 0)
525 static inline int has_header(const char *str, const char *header)
527 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
530 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
533 static int http_read_header(URLContext *h, int *new_location)
535 HTTPContext *s = h->priv_data;
536 char line[MAX_URL_SIZE];
542 if ((err = http_get_line(s, line, sizeof(line))) < 0)
545 av_log(NULL, AV_LOG_TRACE, "header='%s'\n", line);
547 err = process_line(h, line, s->line_count, new_location);
558 static int http_connect(URLContext *h, const char *path, const char *local_path,
559 const char *hoststr, const char *auth,
560 const char *proxyauth, int *new_location)
562 HTTPContext *s = h->priv_data;
564 char headers[HTTP_HEADERS_SIZE] = "";
565 char *authstr = NULL, *proxyauthstr = NULL;
566 int64_t off = s->off;
569 int send_expect_100 = 0;
571 /* send http header */
572 post = h->flags & AVIO_FLAG_WRITE;
575 /* force POST method and disable chunked encoding when
576 * custom HTTP post data is set */
584 method = post ? "POST" : "GET";
586 authstr = ff_http_auth_create_response(&s->auth_state, auth,
588 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
590 if (post && !s->post_data) {
591 send_expect_100 = s->send_expect_100;
592 /* The user has supplied authentication but we don't know the auth type,
593 * send Expect: 100-continue to get the 401 response including the
594 * WWW-Authenticate header, or an 100 continue if no auth actually
597 s->auth_state.auth_type == HTTP_AUTH_NONE &&
602 /* set default headers if needed */
603 if (!has_header(s->headers, "\r\nUser-Agent: "))
604 len += av_strlcatf(headers + len, sizeof(headers) - len,
605 "User-Agent: %s\r\n", s->user_agent);
606 if (!has_header(s->headers, "\r\nAccept: "))
607 len += av_strlcpy(headers + len, "Accept: */*\r\n",
608 sizeof(headers) - len);
609 // Note: we send this on purpose even when s->off is 0 when we're probing,
610 // since it allows us to detect more reliably if a (non-conforming)
611 // server supports seeking by analysing the reply headers.
612 if (!has_header(s->headers, "\r\nRange: ") && !post) {
613 len += av_strlcatf(headers + len, sizeof(headers) - len,
614 "Range: bytes=%"PRId64"-", s->off);
616 len += av_strlcatf(headers + len, sizeof(headers) - len,
617 "%"PRId64, s->end_off - 1);
618 len += av_strlcpy(headers + len, "\r\n",
619 sizeof(headers) - len);
621 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
622 len += av_strlcatf(headers + len, sizeof(headers) - len,
623 "Expect: 100-continue\r\n");
625 if (!has_header(s->headers, "\r\nConnection: ")) {
626 if (s->multiple_requests)
627 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
628 sizeof(headers) - len);
630 len += av_strlcpy(headers + len, "Connection: close\r\n",
631 sizeof(headers) - len);
634 if (!has_header(s->headers, "\r\nHost: "))
635 len += av_strlcatf(headers + len, sizeof(headers) - len,
636 "Host: %s\r\n", hoststr);
637 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
638 len += av_strlcatf(headers + len, sizeof(headers) - len,
639 "Content-Length: %d\r\n", s->post_datalen);
641 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
642 len += av_strlcatf(headers + len, sizeof(headers) - len,
643 "Content-Type: %s\r\n", s->content_type);
644 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
645 len += av_strlcatf(headers + len, sizeof(headers) - len,
646 "Icy-MetaData: %d\r\n", 1);
648 /* now add in custom headers */
650 av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
652 snprintf(s->buffer, sizeof(s->buffer),
661 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
663 authstr ? authstr : "",
664 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
667 av_freep(&proxyauthstr);
668 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
672 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
675 /* init input buffer */
676 s->buf_ptr = s->buffer;
677 s->buf_end = s->buffer;
680 s->icy_data_read = 0;
683 s->end_chunked_post = 0;
685 if (post && !s->post_data && !send_expect_100) {
686 /* Pretend that it did work. We didn't read any header yet, since
687 * we've still to send the POST data, but the code calling this
688 * function will check http_code after we return. */
693 /* wait for header */
694 err = http_read_header(h, new_location);
698 return (off == s->off) ? 0 : -1;
701 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
703 HTTPContext *s = h->priv_data;
705 /* read bytes from input buffer first */
706 len = s->buf_end - s->buf_ptr;
710 memcpy(buf, s->buf_ptr, len);
713 if ((!s->willclose || s->chunksize < 0) &&
714 s->filesize >= 0 && s->off >= s->filesize)
716 len = ffurl_read(s->hd, buf, size);
720 if (s->chunksize > 0)
727 #define DECOMPRESS_BUF_SIZE (256 * 1024)
728 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
730 HTTPContext *s = h->priv_data;
733 if (!s->inflate_buffer) {
734 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
735 if (!s->inflate_buffer)
736 return AVERROR(ENOMEM);
739 if (s->inflate_stream.avail_in == 0) {
740 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
743 s->inflate_stream.next_in = s->inflate_buffer;
744 s->inflate_stream.avail_in = read;
747 s->inflate_stream.avail_out = size;
748 s->inflate_stream.next_out = buf;
750 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
751 if (ret != Z_OK && ret != Z_STREAM_END)
752 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
753 ret, s->inflate_stream.msg);
755 return size - s->inflate_stream.avail_out;
757 #endif /* CONFIG_ZLIB */
759 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
761 HTTPContext *s = h->priv_data;
762 int err, new_location;
767 if (s->end_chunked_post && !s->end_header) {
768 err = http_read_header(h, &new_location);
773 if (s->chunksize >= 0) {
779 if ((err = http_get_line(s, line, sizeof(line))) < 0)
781 } while (!*line); /* skip CR LF from last chunk */
783 s->chunksize = strtoll(line, NULL, 16);
785 av_log(NULL, AV_LOG_TRACE, "Chunked encoding data size: %"PRId64"'\n",
787 if (s->chunksize < 0)
788 return AVERROR_INVALIDDATA;
789 else if (!s->chunksize)
794 size = FFMIN(size, s->chunksize);
798 return http_buf_read_compressed(h, buf, size);
799 #endif /* CONFIG_ZLIB */
800 return http_buf_read(h, buf, size);
803 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
807 int len = http_read_stream(h, buf + pos, size - pos);
815 static void update_metadata(HTTPContext *s, char *data)
824 val = strstr(key, "='");
827 end = strstr(val, "';");
835 av_dict_set(&s->metadata, key, val, 0);
841 static int store_icy(URLContext *h, int size)
843 HTTPContext *s = h->priv_data;
844 /* until next metadata packet */
845 int remaining = s->icy_metaint - s->icy_data_read;
848 return AVERROR_INVALIDDATA;
851 /* The metadata packet is variable sized. It has a 1 byte header
852 * which sets the length of the packet (divided by 16). If it's 0,
853 * the metadata doesn't change. After the packet, icy_metaint bytes
854 * of normal data follows. */
856 int len = http_read_stream_all(h, &ch, 1);
860 char data[255 * 16 + 1];
863 ret = http_read_stream_all(h, data, len);
867 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
869 update_metadata(s, data);
871 s->icy_data_read = 0;
872 remaining = s->icy_metaint;
875 return FFMIN(size, remaining);
878 static int http_read(URLContext *h, uint8_t *buf, int size)
880 HTTPContext *s = h->priv_data;
882 if (s->icy_metaint > 0) {
883 size = store_icy(h, size);
888 size = http_read_stream(h, buf, size);
890 s->icy_data_read += size;
894 /* used only when posting data */
895 static int http_write(URLContext *h, const uint8_t *buf, int size)
897 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
899 char crlf[] = "\r\n";
900 HTTPContext *s = h->priv_data;
902 if (!s->chunked_post) {
903 /* non-chunked data is sent without any special encoding */
904 return ffurl_write(s->hd, buf, size);
907 /* silently ignore zero-size data since chunk encoding that would
910 /* upload data using chunked encoding */
911 snprintf(temp, sizeof(temp), "%x\r\n", size);
913 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
914 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
915 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
921 static int http_shutdown(URLContext *h, int flags)
924 char footer[] = "0\r\n\r\n";
925 HTTPContext *s = h->priv_data;
927 /* signal end of chunked encoding if used */
928 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
929 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
930 ret = ret > 0 ? 0 : ret;
931 s->end_chunked_post = 1;
937 static int http_close(URLContext *h)
940 HTTPContext *s = h->priv_data;
943 inflateEnd(&s->inflate_stream);
944 av_freep(&s->inflate_buffer);
945 #endif /* CONFIG_ZLIB */
947 if (!s->end_chunked_post)
948 /* Close the write direction by sending the end of chunked encoding. */
949 ret = http_shutdown(h, h->flags);
953 av_dict_free(&s->chained_options);
957 static int64_t http_seek(URLContext *h, int64_t off, int whence)
959 HTTPContext *s = h->priv_data;
960 URLContext *old_hd = s->hd;
961 int64_t old_off = s->off;
962 uint8_t old_buf[BUFFER_SIZE];
963 int old_buf_size, ret;
964 AVDictionary *options = NULL;
966 if (whence == AVSEEK_SIZE)
968 else if ((whence == SEEK_CUR && off == 0) ||
969 (whence == SEEK_SET && off == s->off))
971 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
972 return AVERROR(ENOSYS);
974 /* we save the old context in case the seek fails */
975 old_buf_size = s->buf_end - s->buf_ptr;
976 memcpy(old_buf, s->buf_ptr, old_buf_size);
978 if (whence == SEEK_CUR)
980 else if (whence == SEEK_END)
984 /* if it fails, continue on old connection */
985 av_dict_copy(&options, s->chained_options, 0);
986 if ((ret = http_open_cnx(h, &options)) < 0) {
987 av_dict_free(&options);
988 memcpy(s->buffer, old_buf, old_buf_size);
989 s->buf_ptr = s->buffer;
990 s->buf_end = s->buffer + old_buf_size;
995 av_dict_free(&options);
1000 static int http_get_file_handle(URLContext *h)
1002 HTTPContext *s = h->priv_data;
1003 return ffurl_get_file_handle(s->hd);
1006 #define HTTP_CLASS(flavor) \
1007 static const AVClass flavor ## _context_class = { \
1008 .class_name = # flavor, \
1009 .item_name = av_default_item_name, \
1010 .option = options, \
1011 .version = LIBAVUTIL_VERSION_INT, \
1014 #if CONFIG_HTTP_PROTOCOL
1017 const URLProtocol ff_http_protocol = {
1019 .url_open2 = http_open,
1020 .url_read = http_read,
1021 .url_write = http_write,
1022 .url_seek = http_seek,
1023 .url_close = http_close,
1024 .url_get_file_handle = http_get_file_handle,
1025 .url_shutdown = http_shutdown,
1026 .priv_data_size = sizeof(HTTPContext),
1027 .priv_data_class = &http_context_class,
1028 .flags = URL_PROTOCOL_FLAG_NETWORK,
1030 #endif /* CONFIG_HTTP_PROTOCOL */
1032 #if CONFIG_HTTPS_PROTOCOL
1035 const URLProtocol ff_https_protocol = {
1037 .url_open2 = http_open,
1038 .url_read = http_read,
1039 .url_write = http_write,
1040 .url_seek = http_seek,
1041 .url_close = http_close,
1042 .url_get_file_handle = http_get_file_handle,
1043 .url_shutdown = http_shutdown,
1044 .priv_data_size = sizeof(HTTPContext),
1045 .priv_data_class = &https_context_class,
1046 .flags = URL_PROTOCOL_FLAG_NETWORK,
1048 #endif /* CONFIG_HTTPS_PROTOCOL */
1050 #if CONFIG_HTTPPROXY_PROTOCOL
1051 static int http_proxy_close(URLContext *h)
1053 HTTPContext *s = h->priv_data;
1059 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1061 HTTPContext *s = h->priv_data;
1062 char hostname[1024], hoststr[1024];
1063 char auth[1024], pathbuf[1024], *path;
1064 char lower_url[100];
1065 int port, ret = 0, attempts = 0;
1066 HTTPAuthType cur_auth_type;
1072 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1073 pathbuf, sizeof(pathbuf), uri);
1074 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1079 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1082 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1083 &h->interrupt_callback, NULL, h->protocols, h);
1087 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1089 snprintf(s->buffer, sizeof(s->buffer),
1090 "CONNECT %s HTTP/1.1\r\n"
1092 "Connection: close\r\n"
1097 authstr ? "Proxy-" : "", authstr ? authstr : "");
1100 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1103 s->buf_ptr = s->buffer;
1104 s->buf_end = s->buffer;
1107 cur_auth_type = s->proxy_auth_state.auth_type;
1109 /* Note: This uses buffering, potentially reading more than the
1110 * HTTP header. If tunneling a protocol where the server starts
1111 * the conversation, we might buffer part of that here, too.
1112 * Reading that requires using the proper ffurl_read() function
1113 * on this URLContext, not using the fd directly (as the tls
1114 * protocol does). This shouldn't be an issue for tls though,
1115 * since the client starts the conversation there, so there
1116 * is no extra data that we might buffer up here.
1118 ret = http_read_header(h, &new_loc);
1123 if (s->http_code == 407 &&
1124 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1125 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1131 if (s->http_code < 400)
1136 http_proxy_close(h);
1140 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1142 HTTPContext *s = h->priv_data;
1143 return ffurl_write(s->hd, buf, size);
1146 const URLProtocol ff_httpproxy_protocol = {
1147 .name = "httpproxy",
1148 .url_open = http_proxy_open,
1149 .url_read = http_buf_read,
1150 .url_write = http_proxy_write,
1151 .url_close = http_proxy_close,
1152 .url_get_file_handle = http_get_file_handle,
1153 .priv_data_size = sizeof(HTTPContext),
1154 .flags = URL_PROTOCOL_FLAG_NETWORK,
1156 #endif /* CONFIG_HTTPPROXY_PROTOCOL */