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http.c
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1 /*
2  * HTTP protocol for ffmpeg client
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
22 #include "config.h"
23 
24 #if CONFIG_ZLIB
25 #include <zlib.h>
26 #endif /* CONFIG_ZLIB */
27 
28 #include "libavutil/avstring.h"
29 #include "libavutil/opt.h"
30 
31 #include "avformat.h"
32 #include "http.h"
33 #include "httpauth.h"
34 #include "internal.h"
35 #include "network.h"
36 #include "os_support.h"
37 #include "url.h"
38 
39 /* XXX: POST protocol is not completely implemented because ffmpeg uses
40  * only a subset of it. */
41 
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
44  * path names). */
45 #define BUFFER_SIZE MAX_URL_SIZE
46 #define MAX_REDIRECTS 8
47 
48 typedef struct HTTPContext {
49  const AVClass *class;
51  unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
53  int http_code;
54  /* Used if "Transfer-Encoding: chunked" otherwise -1. */
55  int64_t chunksize;
56  int64_t off, end_off, filesize;
57  char *location;
60  char *headers;
61  char *mime_type;
62  char *user_agent;
63  char *content_type;
64  /* Set if the server correctly handles Connection: close and will close
65  * the connection after feeding us the content. */
66  int willclose;
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. */
77  int is_akamai;
79  char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
80  /* A dictionary containing cookies keyed by cookie name */
82  int icy;
83  /* how much data was read since the last ICY metadata packet */
85  /* after how many bytes of read data a new metadata packet will be found */
90 #if CONFIG_ZLIB
91  int compressed;
92  z_stream inflate_stream;
93  uint8_t *inflate_buffer;
94 #endif /* CONFIG_ZLIB */
97  char *method;
98  int reconnect;
99  int listen;
100 } HTTPContext;
101 
102 #define OFFSET(x) offsetof(HTTPContext, x)
103 #define D AV_OPT_FLAG_DECODING_PARAM
104 #define E AV_OPT_FLAG_ENCODING_PARAM
105 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
106 
107 static const AVOption options[] = {
108  { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D },
109  { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
110  { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
111  { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
112  { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
113  { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
114  { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
115  { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
116  { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
117  { "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 },
118  { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
119  { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
120  { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
121  { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
122  { "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"},
123  { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
124  { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
125  { "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 },
126  { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
127  { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
128  { "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 },
129  { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
130  { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D },
131  { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
132  { NULL }
133 };
134 
135 static int http_connect(URLContext *h, const char *path, const char *local_path,
136  const char *hoststr, const char *auth,
137  const char *proxyauth, int *new_location);
138 static int http_read_header(URLContext *h, int *new_location);
139 
141 {
142  memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
143  &((HTTPContext *)src->priv_data)->auth_state,
144  sizeof(HTTPAuthState));
145  memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
146  &((HTTPContext *)src->priv_data)->proxy_auth_state,
147  sizeof(HTTPAuthState));
148 }
149 
151 {
152  const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
153  char hostname[1024], hoststr[1024], proto[10];
154  char auth[1024], proxyauth[1024] = "";
155  char path1[MAX_URL_SIZE];
156  char buf[1024], urlbuf[MAX_URL_SIZE];
157  int port, use_proxy, err, location_changed = 0;
158  HTTPContext *s = h->priv_data;
159 
160  av_url_split(proto, sizeof(proto), auth, sizeof(auth),
161  hostname, sizeof(hostname), &port,
162  path1, sizeof(path1), s->location);
163  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
164 
165  proxy_path = getenv("http_proxy");
166  use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
167  proxy_path && av_strstart(proxy_path, "http://", NULL);
168 
169  if (!strcmp(proto, "https")) {
170  lower_proto = "tls";
171  use_proxy = 0;
172  if (port < 0)
173  port = 443;
174  }
175  if (port < 0)
176  port = 80;
177 
178  if (path1[0] == '\0')
179  path = "/";
180  else
181  path = path1;
182  local_path = path;
183  if (use_proxy) {
184  /* Reassemble the request URL without auth string - we don't
185  * want to leak the auth to the proxy. */
186  ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
187  path1);
188  path = urlbuf;
189  av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
190  hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
191  }
192 
193  ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
194 
195  if (!s->hd) {
196  err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
197  &h->interrupt_callback, options);
198  if (err < 0)
199  return err;
200  }
201 
202  err = http_connect(h, path, local_path, hoststr,
203  auth, proxyauth, &location_changed);
204  if (err < 0)
205  return err;
206 
207  return location_changed;
208 }
209 
210 /* return non zero if error */
211 static int http_open_cnx(URLContext *h, AVDictionary **options)
212 {
213  HTTPAuthType cur_auth_type, cur_proxy_auth_type;
214  HTTPContext *s = h->priv_data;
215  int location_changed, attempts = 0, redirects = 0;
216 redo:
217  av_dict_copy(options, s->chained_options, 0);
218 
219  cur_auth_type = s->auth_state.auth_type;
220  cur_proxy_auth_type = s->auth_state.auth_type;
221 
222  location_changed = http_open_cnx_internal(h, options);
223  if (location_changed < 0)
224  goto fail;
225 
226  attempts++;
227  if (s->http_code == 401) {
228  if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
229  s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
230  ffurl_closep(&s->hd);
231  goto redo;
232  } else
233  goto fail;
234  }
235  if (s->http_code == 407) {
236  if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
237  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
238  ffurl_closep(&s->hd);
239  goto redo;
240  } else
241  goto fail;
242  }
243  if ((s->http_code == 301 || s->http_code == 302 ||
244  s->http_code == 303 || s->http_code == 307) &&
245  location_changed == 1) {
246  /* url moved, get next */
247  ffurl_closep(&s->hd);
248  if (redirects++ >= MAX_REDIRECTS)
249  return AVERROR(EIO);
250  /* Restart the authentication process with the new target, which
251  * might use a different auth mechanism. */
252  memset(&s->auth_state, 0, sizeof(s->auth_state));
253  attempts = 0;
254  location_changed = 0;
255  goto redo;
256  }
257  return 0;
258 
259 fail:
260  if (s->hd)
261  ffurl_closep(&s->hd);
262  if (location_changed < 0)
263  return location_changed;
264  return ff_http_averror(s->http_code, AVERROR(EIO));
265 }
266 
267 int ff_http_do_new_request(URLContext *h, const char *uri)
268 {
269  HTTPContext *s = h->priv_data;
270  AVDictionary *options = NULL;
271  int ret;
272 
273  s->off = 0;
274  s->icy_data_read = 0;
275  av_free(s->location);
276  s->location = av_strdup(uri);
277  if (!s->location)
278  return AVERROR(ENOMEM);
279 
280  ret = http_open_cnx(h, &options);
281  av_dict_free(&options);
282  return ret;
283 }
284 
285 int ff_http_averror(int status_code, int default_averror)
286 {
287  switch (status_code) {
288  case 400: return AVERROR_HTTP_BAD_REQUEST;
289  case 401: return AVERROR_HTTP_UNAUTHORIZED;
290  case 403: return AVERROR_HTTP_FORBIDDEN;
291  case 404: return AVERROR_HTTP_NOT_FOUND;
292  default: break;
293  }
294  if (status_code >= 400 && status_code <= 499)
295  return AVERROR_HTTP_OTHER_4XX;
296  else if (status_code >= 500)
298  else
299  return default_averror;
300 }
301 
302 static int http_listen(URLContext *h, const char *uri, int flags,
303  AVDictionary **options) {
304  HTTPContext *s = h->priv_data;
305  int ret;
306  static const char header[] = "HTTP/1.1 200 OK\r\nContent-Type: application/octet-stream\r\nTransfer-Encoding: chunked\r\n\r\n";
307  char hostname[1024];
308  char lower_url[100];
309  int port, new_location;
310  av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
311  NULL, 0, uri);
312  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
313  NULL);
314  av_dict_set(options, "listen", "1", 0);
315  if ((ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
316  &h->interrupt_callback, options)) < 0)
317  goto fail;
318  if ((ret = ffurl_write(s->hd, header, strlen(header))) < 0)
319  goto fail;
320  if ((ret = http_read_header(h, &new_location)) < 0)
321  goto fail;
322  return 0;
323 
324 fail:
326  return ret;
327 }
328 
329 static int http_open(URLContext *h, const char *uri, int flags,
330  AVDictionary **options)
331 {
332  HTTPContext *s = h->priv_data;
333  int ret;
334 
335  if( s->seekable == 1 )
336  h->is_streamed = 0;
337  else
338  h->is_streamed = 1;
339 
340  s->filesize = -1;
341  s->location = av_strdup(uri);
342  if (!s->location)
343  return AVERROR(ENOMEM);
344  if (options)
345  av_dict_copy(&s->chained_options, *options, 0);
346 
347  if (s->headers) {
348  int len = strlen(s->headers);
349  if (len < 2 || strcmp("\r\n", s->headers + len - 2))
351  "No trailing CRLF found in HTTP header.\n");
352  }
353 
354  if (s->listen) {
355  return http_listen(h, uri, flags, options);
356  }
357  ret = http_open_cnx(h, options);
358  if (ret < 0)
360  return ret;
361 }
362 
363 static int http_getc(HTTPContext *s)
364 {
365  int len;
366  if (s->buf_ptr >= s->buf_end) {
367  len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
368  if (len < 0) {
369  return len;
370  } else if (len == 0) {
371  return AVERROR_EOF;
372  } else {
373  s->buf_ptr = s->buffer;
374  s->buf_end = s->buffer + len;
375  }
376  }
377  return *s->buf_ptr++;
378 }
379 
380 static int http_get_line(HTTPContext *s, char *line, int line_size)
381 {
382  int ch;
383  char *q;
384 
385  q = line;
386  for (;;) {
387  ch = http_getc(s);
388  if (ch < 0)
389  return ch;
390  if (ch == '\n') {
391  /* process line */
392  if (q > line && q[-1] == '\r')
393  q--;
394  *q = '\0';
395 
396  return 0;
397  } else {
398  if ((q - line) < line_size - 1)
399  *q++ = ch;
400  }
401  }
402 }
403 
404 static int check_http_code(URLContext *h, int http_code, const char *end)
405 {
406  HTTPContext *s = h->priv_data;
407  /* error codes are 4xx and 5xx, but regard 401 as a success, so we
408  * don't abort until all headers have been parsed. */
409  if (http_code >= 400 && http_code < 600 &&
410  (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
411  (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
412  end += strspn(end, SPACE_CHARS);
413  av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
414  return ff_http_averror(http_code, AVERROR(EIO));
415  }
416  return 0;
417 }
418 
419 static int parse_location(HTTPContext *s, const char *p)
420 {
421  char redirected_location[MAX_URL_SIZE], *new_loc;
422  ff_make_absolute_url(redirected_location, sizeof(redirected_location),
423  s->location, p);
424  new_loc = av_strdup(redirected_location);
425  if (!new_loc)
426  return AVERROR(ENOMEM);
427  av_free(s->location);
428  s->location = new_loc;
429  return 0;
430 }
431 
432 /* "bytes $from-$to/$document_size" */
433 static void parse_content_range(URLContext *h, const char *p)
434 {
435  HTTPContext *s = h->priv_data;
436  const char *slash;
437 
438  if (!strncmp(p, "bytes ", 6)) {
439  p += 6;
440  s->off = strtoll(p, NULL, 10);
441  if ((slash = strchr(p, '/')) && strlen(slash) > 0)
442  s->filesize = strtoll(slash + 1, NULL, 10);
443  }
444  if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
445  h->is_streamed = 0; /* we _can_ in fact seek */
446 }
447 
448 static int parse_content_encoding(URLContext *h, const char *p)
449 {
450  if (!av_strncasecmp(p, "gzip", 4) ||
451  !av_strncasecmp(p, "deflate", 7)) {
452 #if CONFIG_ZLIB
453  HTTPContext *s = h->priv_data;
454 
455  s->compressed = 1;
456  inflateEnd(&s->inflate_stream);
457  if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
458  av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
459  s->inflate_stream.msg);
460  return AVERROR(ENOSYS);
461  }
462  if (zlibCompileFlags() & (1 << 17)) {
464  "Your zlib was compiled without gzip support.\n");
465  return AVERROR(ENOSYS);
466  }
467 #else
469  "Compressed (%s) content, need zlib with gzip support\n", p);
470  return AVERROR(ENOSYS);
471 #endif /* CONFIG_ZLIB */
472  } else if (!av_strncasecmp(p, "identity", 8)) {
473  // The normal, no-encoding case (although servers shouldn't include
474  // the header at all if this is the case).
475  } else {
476  av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
477  }
478  return 0;
479 }
480 
481 // Concat all Icy- header lines
482 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
483 {
484  int len = 4 + strlen(p) + strlen(tag);
485  int is_first = !s->icy_metadata_headers;
486  int ret;
487 
488  av_dict_set(&s->metadata, tag, p, 0);
489 
490  if (s->icy_metadata_headers)
491  len += strlen(s->icy_metadata_headers);
492 
493  if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
494  return ret;
495 
496  if (is_first)
497  *s->icy_metadata_headers = '\0';
498 
499  av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
500 
501  return 0;
502 }
503 
504 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
505 {
506  char *eql, *name;
507 
508  // duplicate the cookie name (dict will dupe the value)
509  if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
510  if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
511 
512  // add the cookie to the dictionary
513  av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
514 
515  return 0;
516 }
517 
518 static int cookie_string(AVDictionary *dict, char **cookies)
519 {
520  AVDictionaryEntry *e = NULL;
521  int len = 1;
522 
523  // determine how much memory is needed for the cookies string
524  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
525  len += strlen(e->key) + strlen(e->value) + 1;
526 
527  // reallocate the cookies
528  e = NULL;
529  if (*cookies) av_free(*cookies);
530  *cookies = av_malloc(len);
531  if (!*cookies) return AVERROR(ENOMEM);
532  *cookies[0] = '\0';
533 
534  // write out the cookies
535  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
536  av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
537 
538  return 0;
539 }
540 
541 static int process_line(URLContext *h, char *line, int line_count,
542  int *new_location)
543 {
544  HTTPContext *s = h->priv_data;
545  char *tag, *p, *end;
546  int ret;
547 
548  /* end of header */
549  if (line[0] == '\0') {
550  s->end_header = 1;
551  return 0;
552  }
553 
554  p = line;
555  if (line_count == 0) {
556  while (!av_isspace(*p) && *p != '\0')
557  p++;
558  while (av_isspace(*p))
559  p++;
560  s->http_code = strtol(p, &end, 10);
561 
562  av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
563 
564  if ((ret = check_http_code(h, s->http_code, end)) < 0)
565  return ret;
566  } else {
567  while (*p != '\0' && *p != ':')
568  p++;
569  if (*p != ':')
570  return 1;
571 
572  *p = '\0';
573  tag = line;
574  p++;
575  while (av_isspace(*p))
576  p++;
577  if (!av_strcasecmp(tag, "Location")) {
578  if ((ret = parse_location(s, p)) < 0)
579  return ret;
580  *new_location = 1;
581  } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
582  s->filesize = strtoll(p, NULL, 10);
583  } else if (!av_strcasecmp(tag, "Content-Range")) {
584  parse_content_range(h, p);
585  } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
586  !strncmp(p, "bytes", 5) &&
587  s->seekable == -1) {
588  h->is_streamed = 0;
589  } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
590  !av_strncasecmp(p, "chunked", 7)) {
591  s->filesize = -1;
592  s->chunksize = 0;
593  } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
595  } else if (!av_strcasecmp(tag, "Authentication-Info")) {
597  } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
599  } else if (!av_strcasecmp(tag, "Connection")) {
600  if (!strcmp(p, "close"))
601  s->willclose = 1;
602  } else if (!av_strcasecmp(tag, "Server")) {
603  if (!av_strcasecmp(p, "AkamaiGHost")) {
604  s->is_akamai = 1;
605  } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
606  s->is_mediagateway = 1;
607  }
608  } else if (!av_strcasecmp(tag, "Content-Type")) {
609  av_free(s->mime_type);
610  s->mime_type = av_strdup(p);
611  } else if (!av_strcasecmp(tag, "Set-Cookie")) {
612  if (parse_cookie(s, p, &s->cookie_dict))
613  av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
614  } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
615  s->icy_metaint = strtoll(p, NULL, 10);
616  } else if (!av_strncasecmp(tag, "Icy-", 4)) {
617  if ((ret = parse_icy(s, tag, p)) < 0)
618  return ret;
619  } else if (!av_strcasecmp(tag, "Content-Encoding")) {
620  if ((ret = parse_content_encoding(h, p)) < 0)
621  return ret;
622  }
623  }
624  return 1;
625 }
626 
627 /**
628  * Create a string containing cookie values for use as a HTTP cookie header
629  * field value for a particular path and domain from the cookie values stored in
630  * the HTTP protocol context. The cookie string is stored in *cookies.
631  *
632  * @return a negative value if an error condition occurred, 0 otherwise
633  */
634 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
635  const char *domain)
636 {
637  // cookie strings will look like Set-Cookie header field values. Multiple
638  // Set-Cookie fields will result in multiple values delimited by a newline
639  int ret = 0;
640  char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
641 
642  if (!set_cookies) return AVERROR(EINVAL);
643 
644  // destroy any cookies in the dictionary.
646 
647  *cookies = NULL;
648  while ((cookie = av_strtok(set_cookies, "\n", &next))) {
649  int domain_offset = 0;
650  char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
651  set_cookies = NULL;
652 
653  // store the cookie in a dict in case it is updated in the response
654  if (parse_cookie(s, cookie, &s->cookie_dict))
655  av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
656 
657  while ((param = av_strtok(cookie, "; ", &next_param))) {
658  if (cookie) {
659  // first key-value pair is the actual cookie value
660  cvalue = av_strdup(param);
661  cookie = NULL;
662  } else if (!av_strncasecmp("path=", param, 5)) {
663  av_free(cpath);
664  cpath = av_strdup(&param[5]);
665  } else if (!av_strncasecmp("domain=", param, 7)) {
666  // if the cookie specifies a sub-domain, skip the leading dot thereby
667  // supporting URLs that point to sub-domains and the master domain
668  int leading_dot = (param[7] == '.');
669  av_free(cdomain);
670  cdomain = av_strdup(&param[7+leading_dot]);
671  } else {
672  // ignore unknown attributes
673  }
674  }
675  if (!cdomain)
676  cdomain = av_strdup(domain);
677 
678  // ensure all of the necessary values are valid
679  if (!cdomain || !cpath || !cvalue) {
681  "Invalid cookie found, no value, path or domain specified\n");
682  goto done_cookie;
683  }
684 
685  // check if the request path matches the cookie path
686  if (av_strncasecmp(path, cpath, strlen(cpath)))
687  goto done_cookie;
688 
689  // the domain should be at least the size of our cookie domain
690  domain_offset = strlen(domain) - strlen(cdomain);
691  if (domain_offset < 0)
692  goto done_cookie;
693 
694  // match the cookie domain
695  if (av_strcasecmp(&domain[domain_offset], cdomain))
696  goto done_cookie;
697 
698  // cookie parameters match, so copy the value
699  if (!*cookies) {
700  if (!(*cookies = av_strdup(cvalue))) {
701  ret = AVERROR(ENOMEM);
702  goto done_cookie;
703  }
704  } else {
705  char *tmp = *cookies;
706  size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
707  if (!(*cookies = av_malloc(str_size))) {
708  ret = AVERROR(ENOMEM);
709  goto done_cookie;
710  }
711  snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
712  av_free(tmp);
713  }
714 
715  done_cookie:
716  av_freep(&cdomain);
717  av_freep(&cpath);
718  av_freep(&cvalue);
719  if (ret < 0) {
720  if (*cookies) av_freep(cookies);
721  av_free(cset_cookies);
722  return ret;
723  }
724  }
725 
726  av_free(cset_cookies);
727 
728  return 0;
729 }
730 
731 static inline int has_header(const char *str, const char *header)
732 {
733  /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
734  if (!str)
735  return 0;
736  return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
737 }
738 
739 static int http_read_header(URLContext *h, int *new_location)
740 {
741  HTTPContext *s = h->priv_data;
742  char line[MAX_URL_SIZE];
743  int err = 0;
744 
745  s->chunksize = -1;
746 
747  for (;;) {
748  if ((err = http_get_line(s, line, sizeof(line))) < 0)
749  return err;
750 
751  av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
752 
753  err = process_line(h, line, s->line_count, new_location);
754  if (err < 0)
755  return err;
756  if (err == 0)
757  break;
758  s->line_count++;
759  }
760 
761  if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
762  h->is_streamed = 1; /* we can in fact _not_ seek */
763 
764  // add any new cookies into the existing cookie string
767 
768  return err;
769 }
770 
771 static int http_connect(URLContext *h, const char *path, const char *local_path,
772  const char *hoststr, const char *auth,
773  const char *proxyauth, int *new_location)
774 {
775  HTTPContext *s = h->priv_data;
776  int post, err;
777  char headers[HTTP_HEADERS_SIZE] = "";
778  char *authstr = NULL, *proxyauthstr = NULL;
779  int64_t off = s->off;
780  int len = 0;
781  const char *method;
782  int send_expect_100 = 0;
783 
784  /* send http header */
785  post = h->flags & AVIO_FLAG_WRITE;
786 
787  if (s->post_data) {
788  /* force POST method and disable chunked encoding when
789  * custom HTTP post data is set */
790  post = 1;
791  s->chunked_post = 0;
792  }
793 
794  if (s->method)
795  method = s->method;
796  else
797  method = post ? "POST" : "GET";
798 
799  authstr = ff_http_auth_create_response(&s->auth_state, auth,
800  local_path, method);
801  proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
802  local_path, method);
803  if (post && !s->post_data) {
804  send_expect_100 = s->send_expect_100;
805  /* The user has supplied authentication but we don't know the auth type,
806  * send Expect: 100-continue to get the 401 response including the
807  * WWW-Authenticate header, or an 100 continue if no auth actually
808  * is needed. */
809  if (auth && *auth &&
811  s->http_code != 401)
812  send_expect_100 = 1;
813  }
814 
815  /* set default headers if needed */
816  if (!has_header(s->headers, "\r\nUser-Agent: "))
817  len += av_strlcatf(headers + len, sizeof(headers) - len,
818  "User-Agent: %s\r\n", s->user_agent);
819  if (!has_header(s->headers, "\r\nAccept: "))
820  len += av_strlcpy(headers + len, "Accept: */*\r\n",
821  sizeof(headers) - len);
822  // Note: we send this on purpose even when s->off is 0 when we're probing,
823  // since it allows us to detect more reliably if a (non-conforming)
824  // server supports seeking by analysing the reply headers.
825  if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
826  len += av_strlcatf(headers + len, sizeof(headers) - len,
827  "Range: bytes=%"PRId64"-", s->off);
828  if (s->end_off)
829  len += av_strlcatf(headers + len, sizeof(headers) - len,
830  "%"PRId64, s->end_off - 1);
831  len += av_strlcpy(headers + len, "\r\n",
832  sizeof(headers) - len);
833  }
834  if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
835  len += av_strlcatf(headers + len, sizeof(headers) - len,
836  "Expect: 100-continue\r\n");
837 
838  if (!has_header(s->headers, "\r\nConnection: ")) {
839  if (s->multiple_requests)
840  len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
841  sizeof(headers) - len);
842  else
843  len += av_strlcpy(headers + len, "Connection: close\r\n",
844  sizeof(headers) - len);
845  }
846 
847  if (!has_header(s->headers, "\r\nHost: "))
848  len += av_strlcatf(headers + len, sizeof(headers) - len,
849  "Host: %s\r\n", hoststr);
850  if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
851  len += av_strlcatf(headers + len, sizeof(headers) - len,
852  "Content-Length: %d\r\n", s->post_datalen);
853 
854  if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
855  len += av_strlcatf(headers + len, sizeof(headers) - len,
856  "Content-Type: %s\r\n", s->content_type);
857  if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
858  char *cookies = NULL;
859  if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
860  len += av_strlcatf(headers + len, sizeof(headers) - len,
861  "Cookie: %s\r\n", cookies);
862  av_free(cookies);
863  }
864  }
865  if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
866  len += av_strlcatf(headers + len, sizeof(headers) - len,
867  "Icy-MetaData: %d\r\n", 1);
868 
869  /* now add in custom headers */
870  if (s->headers)
871  av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
872 
873  snprintf(s->buffer, sizeof(s->buffer),
874  "%s %s HTTP/1.1\r\n"
875  "%s"
876  "%s"
877  "%s"
878  "%s%s"
879  "\r\n",
880  method,
881  path,
882  post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
883  headers,
884  authstr ? authstr : "",
885  proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
886 
887  av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
888 
889  if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
890  goto done;
891 
892  if (s->post_data)
893  if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
894  goto done;
895 
896  /* init input buffer */
897  s->buf_ptr = s->buffer;
898  s->buf_end = s->buffer;
899  s->line_count = 0;
900  s->off = 0;
901  s->icy_data_read = 0;
902  s->filesize = -1;
903  s->willclose = 0;
904  s->end_chunked_post = 0;
905  s->end_header = 0;
906  if (post && !s->post_data && !send_expect_100) {
907  /* Pretend that it did work. We didn't read any header yet, since
908  * we've still to send the POST data, but the code calling this
909  * function will check http_code after we return. */
910  s->http_code = 200;
911  err = 0;
912  goto done;
913  }
914 
915  /* wait for header */
916  err = http_read_header(h, new_location);
917  if (err < 0)
918  goto done;
919 
920  if (*new_location)
921  s->off = off;
922 
923  err = (off == s->off) ? 0 : -1;
924 done:
925  av_freep(&authstr);
926  av_freep(&proxyauthstr);
927  return err;
928 }
929 
930 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
931 {
932  HTTPContext *s = h->priv_data;
933  int len;
934  /* read bytes from input buffer first */
935  len = s->buf_end - s->buf_ptr;
936  if (len > 0) {
937  if (len > size)
938  len = size;
939  memcpy(buf, s->buf_ptr, len);
940  s->buf_ptr += len;
941  } else {
942  if ((!s->willclose || s->chunksize < 0) &&
943  s->filesize >= 0 && s->off >= s->filesize)
944  return AVERROR_EOF;
945  len = ffurl_read(s->hd, buf, size);
946  if (!len && (!s->willclose || s->chunksize < 0) &&
947  s->filesize >= 0 && s->off < s->filesize) {
948  av_log(h, AV_LOG_ERROR,
949  "Stream ends prematurely at %"PRId64", should be %"PRId64"\n",
950  s->off, s->filesize
951  );
952  return AVERROR(EIO);
953  }
954  }
955  if (len > 0) {
956  s->off += len;
957  if (s->chunksize > 0)
958  s->chunksize -= len;
959  }
960  return len;
961 }
962 
963 #if CONFIG_ZLIB
964 #define DECOMPRESS_BUF_SIZE (256 * 1024)
965 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
966 {
967  HTTPContext *s = h->priv_data;
968  int ret;
969 
970  if (!s->inflate_buffer) {
971  s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
972  if (!s->inflate_buffer)
973  return AVERROR(ENOMEM);
974  }
975 
976  if (s->inflate_stream.avail_in == 0) {
977  int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
978  if (read <= 0)
979  return read;
980  s->inflate_stream.next_in = s->inflate_buffer;
981  s->inflate_stream.avail_in = read;
982  }
983 
984  s->inflate_stream.avail_out = size;
985  s->inflate_stream.next_out = buf;
986 
987  ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
988  if (ret != Z_OK && ret != Z_STREAM_END)
989  av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
990  ret, s->inflate_stream.msg);
991 
992  return size - s->inflate_stream.avail_out;
993 }
994 #endif /* CONFIG_ZLIB */
995 
996 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
997 
998 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
999 {
1000  HTTPContext *s = h->priv_data;
1001  int err, new_location, read_ret, seek_ret;
1002 
1003  if (!s->hd)
1004  return AVERROR_EOF;
1005 
1006  if (s->end_chunked_post && !s->end_header) {
1007  err = http_read_header(h, &new_location);
1008  if (err < 0)
1009  return err;
1010  }
1011 
1012  if (s->chunksize >= 0) {
1013  if (!s->chunksize) {
1014  char line[32];
1015 
1016  do {
1017  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1018  return err;
1019  } while (!*line); /* skip CR LF from last chunk */
1020 
1021  s->chunksize = strtoll(line, NULL, 16);
1022 
1023  av_log(NULL, AV_LOG_TRACE, "Chunked encoding data size: %"PRId64"'\n",
1024  s->chunksize);
1025 
1026  if (!s->chunksize)
1027  return 0;
1028  }
1029  size = FFMIN(size, s->chunksize);
1030  }
1031 #if CONFIG_ZLIB
1032  if (s->compressed)
1033  return http_buf_read_compressed(h, buf, size);
1034 #endif /* CONFIG_ZLIB */
1035  read_ret = http_buf_read(h, buf, size);
1036  if (read_ret < 0 && s->reconnect && !h->is_streamed && s->filesize > 0 && s->off < s->filesize) {
1037  av_log(h, AV_LOG_INFO, "Will reconnect at %"PRId64".\n", s->off);
1038  seek_ret = http_seek_internal(h, s->off, SEEK_SET, 1);
1039  if (seek_ret != s->off) {
1040  av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRId64".\n", s->off);
1041  return read_ret;
1042  }
1043 
1044  read_ret = http_buf_read(h, buf, size);
1045  }
1046 
1047  return read_ret;
1048 }
1049 
1050 // Like http_read_stream(), but no short reads.
1051 // Assumes partial reads are an error.
1052 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1053 {
1054  int pos = 0;
1055  while (pos < size) {
1056  int len = http_read_stream(h, buf + pos, size - pos);
1057  if (len < 0)
1058  return len;
1059  pos += len;
1060  }
1061  return pos;
1062 }
1063 
1064 static void update_metadata(HTTPContext *s, char *data)
1065 {
1066  char *key;
1067  char *val;
1068  char *end;
1069  char *next = data;
1070 
1071  while (*next) {
1072  key = next;
1073  val = strstr(key, "='");
1074  if (!val)
1075  break;
1076  end = strstr(val, "';");
1077  if (!end)
1078  break;
1079 
1080  *val = '\0';
1081  *end = '\0';
1082  val += 2;
1083 
1084  av_dict_set(&s->metadata, key, val, 0);
1085 
1086  next = end + 2;
1087  }
1088 }
1089 
1090 static int store_icy(URLContext *h, int size)
1091 {
1092  HTTPContext *s = h->priv_data;
1093  /* until next metadata packet */
1094  int remaining = s->icy_metaint - s->icy_data_read;
1095 
1096  if (remaining < 0)
1097  return AVERROR_INVALIDDATA;
1098 
1099  if (!remaining) {
1100  /* The metadata packet is variable sized. It has a 1 byte header
1101  * which sets the length of the packet (divided by 16). If it's 0,
1102  * the metadata doesn't change. After the packet, icy_metaint bytes
1103  * of normal data follows. */
1104  uint8_t ch;
1105  int len = http_read_stream_all(h, &ch, 1);
1106  if (len < 0)
1107  return len;
1108  if (ch > 0) {
1109  char data[255 * 16 + 1];
1110  int ret;
1111  len = ch * 16;
1112  ret = http_read_stream_all(h, data, len);
1113  if (ret < 0)
1114  return ret;
1115  data[len + 1] = 0;
1116  if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1117  return ret;
1118  update_metadata(s, data);
1119  }
1120  s->icy_data_read = 0;
1121  remaining = s->icy_metaint;
1122  }
1123 
1124  return FFMIN(size, remaining);
1125 }
1126 
1127 static int http_read(URLContext *h, uint8_t *buf, int size)
1128 {
1129  HTTPContext *s = h->priv_data;
1130 
1131  if (s->icy_metaint > 0) {
1132  size = store_icy(h, size);
1133  if (size < 0)
1134  return size;
1135  }
1136 
1137  size = http_read_stream(h, buf, size);
1138  if (size > 0)
1139  s->icy_data_read += size;
1140  return size;
1141 }
1142 
1143 /* used only when posting data */
1144 static int http_write(URLContext *h, const uint8_t *buf, int size)
1145 {
1146  char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1147  int ret;
1148  char crlf[] = "\r\n";
1149  HTTPContext *s = h->priv_data;
1150 
1151  if (!s->chunked_post) {
1152  /* non-chunked data is sent without any special encoding */
1153  return ffurl_write(s->hd, buf, size);
1154  }
1155 
1156  /* silently ignore zero-size data since chunk encoding that would
1157  * signal EOF */
1158  if (size > 0) {
1159  /* upload data using chunked encoding */
1160  snprintf(temp, sizeof(temp), "%x\r\n", size);
1161 
1162  if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1163  (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1164  (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1165  return ret;
1166  }
1167  return size;
1168 }
1169 
1170 static int http_shutdown(URLContext *h, int flags)
1171 {
1172  int ret = 0;
1173  char footer[] = "0\r\n\r\n";
1174  HTTPContext *s = h->priv_data;
1175 
1176  /* signal end of chunked encoding if used */
1177  if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1178  ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1179  ret = ret > 0 ? 0 : ret;
1180  s->end_chunked_post = 1;
1181  }
1182 
1183  return ret;
1184 }
1185 
1186 static int http_close(URLContext *h)
1187 {
1188  int ret = 0;
1189  HTTPContext *s = h->priv_data;
1190 
1191 #if CONFIG_ZLIB
1192  inflateEnd(&s->inflate_stream);
1193  av_freep(&s->inflate_buffer);
1194 #endif /* CONFIG_ZLIB */
1195 
1196  if (!s->end_chunked_post)
1197  /* Close the write direction by sending the end of chunked encoding. */
1198  ret = http_shutdown(h, h->flags);
1199 
1200  if (s->hd)
1201  ffurl_closep(&s->hd);
1203  return ret;
1204 }
1205 
1206 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1207 {
1208  HTTPContext *s = h->priv_data;
1209  URLContext *old_hd = s->hd;
1210  int64_t old_off = s->off;
1211  uint8_t old_buf[BUFFER_SIZE];
1212  int old_buf_size, ret;
1213  AVDictionary *options = NULL;
1214 
1215  if (whence == AVSEEK_SIZE)
1216  return s->filesize;
1217  else if (!force_reconnect &&
1218  ((whence == SEEK_CUR && off == 0) ||
1219  (whence == SEEK_SET && off == s->off)))
1220  return s->off;
1221  else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1222  return AVERROR(ENOSYS);
1223 
1224  if (whence == SEEK_CUR)
1225  off += s->off;
1226  else if (whence == SEEK_END)
1227  off += s->filesize;
1228  else if (whence != SEEK_SET)
1229  return AVERROR(EINVAL);
1230  if (off < 0)
1231  return AVERROR(EINVAL);
1232  s->off = off;
1233 
1234  /* we save the old context in case the seek fails */
1235  old_buf_size = s->buf_end - s->buf_ptr;
1236  memcpy(old_buf, s->buf_ptr, old_buf_size);
1237  s->hd = NULL;
1238 
1239  /* if it fails, continue on old connection */
1240  if ((ret = http_open_cnx(h, &options)) < 0) {
1241  av_dict_free(&options);
1242  memcpy(s->buffer, old_buf, old_buf_size);
1243  s->buf_ptr = s->buffer;
1244  s->buf_end = s->buffer + old_buf_size;
1245  s->hd = old_hd;
1246  s->off = old_off;
1247  return ret;
1248  }
1249  av_dict_free(&options);
1250  ffurl_close(old_hd);
1251  return off;
1252 }
1253 
1254 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1255 {
1256  return http_seek_internal(h, off, whence, 0);
1257 }
1258 
1260 {
1261  HTTPContext *s = h->priv_data;
1262  return ffurl_get_file_handle(s->hd);
1263 }
1264 
1265 #define HTTP_CLASS(flavor) \
1266 static const AVClass flavor ## _context_class = { \
1267  .class_name = # flavor, \
1268  .item_name = av_default_item_name, \
1269  .option = options, \
1270  .version = LIBAVUTIL_VERSION_INT, \
1271 }
1272 
1273 #if CONFIG_HTTP_PROTOCOL
1274 HTTP_CLASS(http);
1275 
1276 URLProtocol ff_http_protocol = {
1277  .name = "http",
1278  .url_open2 = http_open,
1279  .url_read = http_read,
1280  .url_write = http_write,
1281  .url_seek = http_seek,
1282  .url_close = http_close,
1283  .url_get_file_handle = http_get_file_handle,
1284  .url_shutdown = http_shutdown,
1285  .priv_data_size = sizeof(HTTPContext),
1286  .priv_data_class = &http_context_class,
1288 };
1289 #endif /* CONFIG_HTTP_PROTOCOL */
1290 
1291 #if CONFIG_HTTPS_PROTOCOL
1292 HTTP_CLASS(https);
1293 
1294 URLProtocol ff_https_protocol = {
1295  .name = "https",
1296  .url_open2 = http_open,
1297  .url_read = http_read,
1298  .url_write = http_write,
1299  .url_seek = http_seek,
1300  .url_close = http_close,
1301  .url_get_file_handle = http_get_file_handle,
1302  .url_shutdown = http_shutdown,
1303  .priv_data_size = sizeof(HTTPContext),
1304  .priv_data_class = &https_context_class,
1306 };
1307 #endif /* CONFIG_HTTPS_PROTOCOL */
1308 
1309 #if CONFIG_HTTPPROXY_PROTOCOL
1310 static int http_proxy_close(URLContext *h)
1311 {
1312  HTTPContext *s = h->priv_data;
1313  if (s->hd)
1314  ffurl_closep(&s->hd);
1315  return 0;
1316 }
1317 
1318 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1319 {
1320  HTTPContext *s = h->priv_data;
1321  char hostname[1024], hoststr[1024];
1322  char auth[1024], pathbuf[1024], *path;
1323  char lower_url[100];
1324  int port, ret = 0, attempts = 0;
1325  HTTPAuthType cur_auth_type;
1326  char *authstr;
1327  int new_loc;
1328 
1329  if( s->seekable == 1 )
1330  h->is_streamed = 0;
1331  else
1332  h->is_streamed = 1;
1333 
1334  av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1335  pathbuf, sizeof(pathbuf), uri);
1336  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1337  path = pathbuf;
1338  if (*path == '/')
1339  path++;
1340 
1341  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1342  NULL);
1343 redo:
1344  ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1345  &h->interrupt_callback, NULL);
1346  if (ret < 0)
1347  return ret;
1348 
1349  authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1350  path, "CONNECT");
1351  snprintf(s->buffer, sizeof(s->buffer),
1352  "CONNECT %s HTTP/1.1\r\n"
1353  "Host: %s\r\n"
1354  "Connection: close\r\n"
1355  "%s%s"
1356  "\r\n",
1357  path,
1358  hoststr,
1359  authstr ? "Proxy-" : "", authstr ? authstr : "");
1360  av_freep(&authstr);
1361 
1362  if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1363  goto fail;
1364 
1365  s->buf_ptr = s->buffer;
1366  s->buf_end = s->buffer;
1367  s->line_count = 0;
1368  s->filesize = -1;
1369  cur_auth_type = s->proxy_auth_state.auth_type;
1370 
1371  /* Note: This uses buffering, potentially reading more than the
1372  * HTTP header. If tunneling a protocol where the server starts
1373  * the conversation, we might buffer part of that here, too.
1374  * Reading that requires using the proper ffurl_read() function
1375  * on this URLContext, not using the fd directly (as the tls
1376  * protocol does). This shouldn't be an issue for tls though,
1377  * since the client starts the conversation there, so there
1378  * is no extra data that we might buffer up here.
1379  */
1380  ret = http_read_header(h, &new_loc);
1381  if (ret < 0)
1382  goto fail;
1383 
1384  attempts++;
1385  if (s->http_code == 407 &&
1386  (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1387  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1388  ffurl_closep(&s->hd);
1389  goto redo;
1390  }
1391 
1392  if (s->http_code < 400)
1393  return 0;
1394  ret = ff_http_averror(s->http_code, AVERROR(EIO));
1395 
1396 fail:
1397  http_proxy_close(h);
1398  return ret;
1399 }
1400 
1401 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1402 {
1403  HTTPContext *s = h->priv_data;
1404  return ffurl_write(s->hd, buf, size);
1405 }
1406 
1407 URLProtocol ff_httpproxy_protocol = {
1408  .name = "httpproxy",
1409  .url_open = http_proxy_open,
1410  .url_read = http_buf_read,
1411  .url_write = http_proxy_write,
1412  .url_close = http_proxy_close,
1413  .url_get_file_handle = http_get_file_handle,
1414  .priv_data_size = sizeof(HTTPContext),
1415  .flags = URL_PROTOCOL_FLAG_NETWORK,
1416 };
1417 #endif /* CONFIG_HTTPPROXY_PROTOCOL */