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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 or set the expected HTTP method from a client", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | 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 void handle_http_errors(URLContext *h, int error)
303 {
304  static const char bad_request[] = "HTTP/1.1 400 Bad Request\r\nContent-Type: text/plain\r\n\r\n400 Bad Request\r\n";
305  static const char internal_server_error[] = "HTTP/1.1 500 Internal server error\r\nContent-Type: text/plain\r\n\r\n500 Internal server error\r\n";
306  HTTPContext *s = h->priv_data;
307  if (h->is_connected) {
308  switch(error) {
310  ffurl_write(s->hd, bad_request, strlen(bad_request));
311  break;
312  default:
313  av_log(h, AV_LOG_ERROR, "Unhandled HTTP error.\n");
314  ffurl_write(s->hd, internal_server_error, strlen(internal_server_error));
315  }
316  }
317 }
318 
319 static int http_listen(URLContext *h, const char *uri, int flags,
320  AVDictionary **options) {
321  HTTPContext *s = h->priv_data;
322  int ret;
323  static const char header[] = "HTTP/1.1 200 OK\r\nContent-Type: application/octet-stream\r\nTransfer-Encoding: chunked\r\n\r\n";
324  char hostname[1024], proto[10];
325  char lower_url[100];
326  const char *lower_proto = "tcp";
327  int port, new_location;
328  av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
329  NULL, 0, uri);
330  if (!strcmp(proto, "https"))
331  lower_proto = "tls";
332  ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
333  NULL);
334  av_dict_set(options, "listen", "1", 0);
335  if ((ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
336  &h->interrupt_callback, options)) < 0)
337  goto fail;
338  if ((ret = http_read_header(h, &new_location)) < 0)
339  goto fail;
340  if ((ret = ffurl_write(s->hd, header, strlen(header))) < 0)
341  goto fail;
342  return 0;
343 
344 fail:
345  handle_http_errors(h, ret);
347  return ret;
348 }
349 
350 static int http_open(URLContext *h, const char *uri, int flags,
351  AVDictionary **options)
352 {
353  HTTPContext *s = h->priv_data;
354  int ret;
355 
356  if( s->seekable == 1 )
357  h->is_streamed = 0;
358  else
359  h->is_streamed = 1;
360 
361  s->filesize = -1;
362  s->location = av_strdup(uri);
363  if (!s->location)
364  return AVERROR(ENOMEM);
365  if (options)
366  av_dict_copy(&s->chained_options, *options, 0);
367 
368  if (s->headers) {
369  int len = strlen(s->headers);
370  if (len < 2 || strcmp("\r\n", s->headers + len - 2))
372  "No trailing CRLF found in HTTP header.\n");
373  }
374 
375  if (s->listen) {
376  return http_listen(h, uri, flags, options);
377  }
378  ret = http_open_cnx(h, options);
379  if (ret < 0)
381  return ret;
382 }
383 
384 static int http_getc(HTTPContext *s)
385 {
386  int len;
387  if (s->buf_ptr >= s->buf_end) {
388  len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
389  if (len < 0) {
390  return len;
391  } else if (len == 0) {
392  return AVERROR_EOF;
393  } else {
394  s->buf_ptr = s->buffer;
395  s->buf_end = s->buffer + len;
396  }
397  }
398  return *s->buf_ptr++;
399 }
400 
401 static int http_get_line(HTTPContext *s, char *line, int line_size)
402 {
403  int ch;
404  char *q;
405 
406  q = line;
407  for (;;) {
408  ch = http_getc(s);
409  if (ch < 0)
410  return ch;
411  if (ch == '\n') {
412  /* process line */
413  if (q > line && q[-1] == '\r')
414  q--;
415  *q = '\0';
416 
417  return 0;
418  } else {
419  if ((q - line) < line_size - 1)
420  *q++ = ch;
421  }
422  }
423 }
424 
425 static int check_http_code(URLContext *h, int http_code, const char *end)
426 {
427  HTTPContext *s = h->priv_data;
428  /* error codes are 4xx and 5xx, but regard 401 as a success, so we
429  * don't abort until all headers have been parsed. */
430  if (http_code >= 400 && http_code < 600 &&
431  (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
432  (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
433  end += strspn(end, SPACE_CHARS);
434  av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
435  return ff_http_averror(http_code, AVERROR(EIO));
436  }
437  return 0;
438 }
439 
440 static int parse_location(HTTPContext *s, const char *p)
441 {
442  char redirected_location[MAX_URL_SIZE], *new_loc;
443  ff_make_absolute_url(redirected_location, sizeof(redirected_location),
444  s->location, p);
445  new_loc = av_strdup(redirected_location);
446  if (!new_loc)
447  return AVERROR(ENOMEM);
448  av_free(s->location);
449  s->location = new_loc;
450  return 0;
451 }
452 
453 /* "bytes $from-$to/$document_size" */
454 static void parse_content_range(URLContext *h, const char *p)
455 {
456  HTTPContext *s = h->priv_data;
457  const char *slash;
458 
459  if (!strncmp(p, "bytes ", 6)) {
460  p += 6;
461  s->off = strtoll(p, NULL, 10);
462  if ((slash = strchr(p, '/')) && strlen(slash) > 0)
463  s->filesize = strtoll(slash + 1, NULL, 10);
464  }
465  if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
466  h->is_streamed = 0; /* we _can_ in fact seek */
467 }
468 
469 static int parse_content_encoding(URLContext *h, const char *p)
470 {
471  if (!av_strncasecmp(p, "gzip", 4) ||
472  !av_strncasecmp(p, "deflate", 7)) {
473 #if CONFIG_ZLIB
474  HTTPContext *s = h->priv_data;
475 
476  s->compressed = 1;
477  inflateEnd(&s->inflate_stream);
478  if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
479  av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
480  s->inflate_stream.msg);
481  return AVERROR(ENOSYS);
482  }
483  if (zlibCompileFlags() & (1 << 17)) {
485  "Your zlib was compiled without gzip support.\n");
486  return AVERROR(ENOSYS);
487  }
488 #else
490  "Compressed (%s) content, need zlib with gzip support\n", p);
491  return AVERROR(ENOSYS);
492 #endif /* CONFIG_ZLIB */
493  } else if (!av_strncasecmp(p, "identity", 8)) {
494  // The normal, no-encoding case (although servers shouldn't include
495  // the header at all if this is the case).
496  } else {
497  av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
498  }
499  return 0;
500 }
501 
502 // Concat all Icy- header lines
503 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
504 {
505  int len = 4 + strlen(p) + strlen(tag);
506  int is_first = !s->icy_metadata_headers;
507  int ret;
508 
509  av_dict_set(&s->metadata, tag, p, 0);
510 
511  if (s->icy_metadata_headers)
512  len += strlen(s->icy_metadata_headers);
513 
514  if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
515  return ret;
516 
517  if (is_first)
518  *s->icy_metadata_headers = '\0';
519 
520  av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
521 
522  return 0;
523 }
524 
525 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
526 {
527  char *eql, *name;
528 
529  // duplicate the cookie name (dict will dupe the value)
530  if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
531  if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
532 
533  // add the cookie to the dictionary
534  av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
535 
536  return 0;
537 }
538 
539 static int cookie_string(AVDictionary *dict, char **cookies)
540 {
541  AVDictionaryEntry *e = NULL;
542  int len = 1;
543 
544  // determine how much memory is needed for the cookies string
545  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
546  len += strlen(e->key) + strlen(e->value) + 1;
547 
548  // reallocate the cookies
549  e = NULL;
550  if (*cookies) av_free(*cookies);
551  *cookies = av_malloc(len);
552  if (!*cookies) return AVERROR(ENOMEM);
553  *cookies[0] = '\0';
554 
555  // write out the cookies
556  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
557  av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
558 
559  return 0;
560 }
561 
562 static int process_line(URLContext *h, char *line, int line_count,
563  int *new_location)
564 {
565  HTTPContext *s = h->priv_data;
566  const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
567  char *tag, *p, *end, *method, *resource, *version;
568  int ret;
569 
570  /* end of header */
571  if (line[0] == '\0') {
572  s->end_header = 1;
573  return 0;
574  }
575 
576  p = line;
577  if (line_count == 0) {
578  if (s->listen) {
579  // HTTP method
580  method = p;
581  while (!av_isspace(*p))
582  p++;
583  *(p++) = '\0';
584  av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
585  if (s->method) {
586  if (av_strcasecmp(s->method, method)) {
587  av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
588  s->method, method);
589  return ff_http_averror(400, AVERROR(EIO));
590  }
591  } else {
592  // use autodetected HTTP method to expect
593  av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
594  if (av_strcasecmp(auto_method, method)) {
595  av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
596  "(%s autodetected %s received)\n", auto_method, method);
597  return ff_http_averror(400, AVERROR(EIO));
598  }
599  }
600 
601  // HTTP resource
602  while (av_isspace(*p))
603  p++;
604  resource = p;
605  while (!av_isspace(*p))
606  p++;
607  *(p++) = '\0';
608  av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
609 
610  // HTTP version
611  while (av_isspace(*p))
612  p++;
613  version = p;
614  while (!av_isspace(*p))
615  p++;
616  *p = '\0';
617  if (av_strncasecmp(version, "HTTP/", 5)) {
618  av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
619  return ff_http_averror(400, AVERROR(EIO));
620  }
621  av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
622  } else {
623  while (!av_isspace(*p) && *p != '\0')
624  p++;
625  while (av_isspace(*p))
626  p++;
627  s->http_code = strtol(p, &end, 10);
628 
629  av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
630 
631  if ((ret = check_http_code(h, s->http_code, end)) < 0)
632  return ret;
633  }
634  } else {
635  while (*p != '\0' && *p != ':')
636  p++;
637  if (*p != ':')
638  return 1;
639 
640  *p = '\0';
641  tag = line;
642  p++;
643  while (av_isspace(*p))
644  p++;
645  if (!av_strcasecmp(tag, "Location")) {
646  if ((ret = parse_location(s, p)) < 0)
647  return ret;
648  *new_location = 1;
649  } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
650  s->filesize = strtoll(p, NULL, 10);
651  } else if (!av_strcasecmp(tag, "Content-Range")) {
652  parse_content_range(h, p);
653  } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
654  !strncmp(p, "bytes", 5) &&
655  s->seekable == -1) {
656  h->is_streamed = 0;
657  } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
658  !av_strncasecmp(p, "chunked", 7)) {
659  s->filesize = -1;
660  s->chunksize = 0;
661  } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
663  } else if (!av_strcasecmp(tag, "Authentication-Info")) {
665  } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
667  } else if (!av_strcasecmp(tag, "Connection")) {
668  if (!strcmp(p, "close"))
669  s->willclose = 1;
670  } else if (!av_strcasecmp(tag, "Server")) {
671  if (!av_strcasecmp(p, "AkamaiGHost")) {
672  s->is_akamai = 1;
673  } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
674  s->is_mediagateway = 1;
675  }
676  } else if (!av_strcasecmp(tag, "Content-Type")) {
677  av_free(s->mime_type);
678  s->mime_type = av_strdup(p);
679  } else if (!av_strcasecmp(tag, "Set-Cookie")) {
680  if (parse_cookie(s, p, &s->cookie_dict))
681  av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
682  } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
683  s->icy_metaint = strtoll(p, NULL, 10);
684  } else if (!av_strncasecmp(tag, "Icy-", 4)) {
685  if ((ret = parse_icy(s, tag, p)) < 0)
686  return ret;
687  } else if (!av_strcasecmp(tag, "Content-Encoding")) {
688  if ((ret = parse_content_encoding(h, p)) < 0)
689  return ret;
690  }
691  }
692  return 1;
693 }
694 
695 /**
696  * Create a string containing cookie values for use as a HTTP cookie header
697  * field value for a particular path and domain from the cookie values stored in
698  * the HTTP protocol context. The cookie string is stored in *cookies.
699  *
700  * @return a negative value if an error condition occurred, 0 otherwise
701  */
702 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
703  const char *domain)
704 {
705  // cookie strings will look like Set-Cookie header field values. Multiple
706  // Set-Cookie fields will result in multiple values delimited by a newline
707  int ret = 0;
708  char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies;
709 
710  if (!set_cookies) return AVERROR(EINVAL);
711 
712  // destroy any cookies in the dictionary.
714 
715  *cookies = NULL;
716  while ((cookie = av_strtok(set_cookies, "\n", &next))) {
717  int domain_offset = 0;
718  char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL;
719  set_cookies = NULL;
720 
721  // store the cookie in a dict in case it is updated in the response
722  if (parse_cookie(s, cookie, &s->cookie_dict))
723  av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
724 
725  while ((param = av_strtok(cookie, "; ", &next_param))) {
726  if (cookie) {
727  // first key-value pair is the actual cookie value
728  cvalue = av_strdup(param);
729  cookie = NULL;
730  } else if (!av_strncasecmp("path=", param, 5)) {
731  av_free(cpath);
732  cpath = av_strdup(&param[5]);
733  } else if (!av_strncasecmp("domain=", param, 7)) {
734  // if the cookie specifies a sub-domain, skip the leading dot thereby
735  // supporting URLs that point to sub-domains and the master domain
736  int leading_dot = (param[7] == '.');
737  av_free(cdomain);
738  cdomain = av_strdup(&param[7+leading_dot]);
739  } else {
740  // ignore unknown attributes
741  }
742  }
743  if (!cdomain)
744  cdomain = av_strdup(domain);
745 
746  // ensure all of the necessary values are valid
747  if (!cdomain || !cpath || !cvalue) {
749  "Invalid cookie found, no value, path or domain specified\n");
750  goto done_cookie;
751  }
752 
753  // check if the request path matches the cookie path
754  if (av_strncasecmp(path, cpath, strlen(cpath)))
755  goto done_cookie;
756 
757  // the domain should be at least the size of our cookie domain
758  domain_offset = strlen(domain) - strlen(cdomain);
759  if (domain_offset < 0)
760  goto done_cookie;
761 
762  // match the cookie domain
763  if (av_strcasecmp(&domain[domain_offset], cdomain))
764  goto done_cookie;
765 
766  // cookie parameters match, so copy the value
767  if (!*cookies) {
768  if (!(*cookies = av_strdup(cvalue))) {
769  ret = AVERROR(ENOMEM);
770  goto done_cookie;
771  }
772  } else {
773  char *tmp = *cookies;
774  size_t str_size = strlen(cvalue) + strlen(*cookies) + 3;
775  if (!(*cookies = av_malloc(str_size))) {
776  ret = AVERROR(ENOMEM);
777  goto done_cookie;
778  }
779  snprintf(*cookies, str_size, "%s; %s", tmp, cvalue);
780  av_free(tmp);
781  }
782 
783  done_cookie:
784  av_freep(&cdomain);
785  av_freep(&cpath);
786  av_freep(&cvalue);
787  if (ret < 0) {
788  if (*cookies) av_freep(cookies);
789  av_free(cset_cookies);
790  return ret;
791  }
792  }
793 
794  av_free(cset_cookies);
795 
796  return 0;
797 }
798 
799 static inline int has_header(const char *str, const char *header)
800 {
801  /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
802  if (!str)
803  return 0;
804  return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
805 }
806 
807 static int http_read_header(URLContext *h, int *new_location)
808 {
809  HTTPContext *s = h->priv_data;
810  char line[MAX_URL_SIZE];
811  int err = 0;
812 
813  s->chunksize = -1;
814 
815  for (;;) {
816  if ((err = http_get_line(s, line, sizeof(line))) < 0)
817  return err;
818 
819  av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
820 
821  err = process_line(h, line, s->line_count, new_location);
822  if (err < 0)
823  return err;
824  if (err == 0)
825  break;
826  s->line_count++;
827  }
828 
829  if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
830  h->is_streamed = 1; /* we can in fact _not_ seek */
831 
832  // add any new cookies into the existing cookie string
835 
836  return err;
837 }
838 
839 static int http_connect(URLContext *h, const char *path, const char *local_path,
840  const char *hoststr, const char *auth,
841  const char *proxyauth, int *new_location)
842 {
843  HTTPContext *s = h->priv_data;
844  int post, err;
845  char headers[HTTP_HEADERS_SIZE] = "";
846  char *authstr = NULL, *proxyauthstr = NULL;
847  int64_t off = s->off;
848  int len = 0;
849  const char *method;
850  int send_expect_100 = 0;
851 
852  /* send http header */
853  post = h->flags & AVIO_FLAG_WRITE;
854 
855  if (s->post_data) {
856  /* force POST method and disable chunked encoding when
857  * custom HTTP post data is set */
858  post = 1;
859  s->chunked_post = 0;
860  }
861 
862  if (s->method)
863  method = s->method;
864  else
865  method = post ? "POST" : "GET";
866 
867  authstr = ff_http_auth_create_response(&s->auth_state, auth,
868  local_path, method);
869  proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
870  local_path, method);
871  if (post && !s->post_data) {
872  send_expect_100 = s->send_expect_100;
873  /* The user has supplied authentication but we don't know the auth type,
874  * send Expect: 100-continue to get the 401 response including the
875  * WWW-Authenticate header, or an 100 continue if no auth actually
876  * is needed. */
877  if (auth && *auth &&
879  s->http_code != 401)
880  send_expect_100 = 1;
881  }
882 
883  /* set default headers if needed */
884  if (!has_header(s->headers, "\r\nUser-Agent: "))
885  len += av_strlcatf(headers + len, sizeof(headers) - len,
886  "User-Agent: %s\r\n", s->user_agent);
887  if (!has_header(s->headers, "\r\nAccept: "))
888  len += av_strlcpy(headers + len, "Accept: */*\r\n",
889  sizeof(headers) - len);
890  // Note: we send this on purpose even when s->off is 0 when we're probing,
891  // since it allows us to detect more reliably if a (non-conforming)
892  // server supports seeking by analysing the reply headers.
893  if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
894  len += av_strlcatf(headers + len, sizeof(headers) - len,
895  "Range: bytes=%"PRId64"-", s->off);
896  if (s->end_off)
897  len += av_strlcatf(headers + len, sizeof(headers) - len,
898  "%"PRId64, s->end_off - 1);
899  len += av_strlcpy(headers + len, "\r\n",
900  sizeof(headers) - len);
901  }
902  if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
903  len += av_strlcatf(headers + len, sizeof(headers) - len,
904  "Expect: 100-continue\r\n");
905 
906  if (!has_header(s->headers, "\r\nConnection: ")) {
907  if (s->multiple_requests)
908  len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
909  sizeof(headers) - len);
910  else
911  len += av_strlcpy(headers + len, "Connection: close\r\n",
912  sizeof(headers) - len);
913  }
914 
915  if (!has_header(s->headers, "\r\nHost: "))
916  len += av_strlcatf(headers + len, sizeof(headers) - len,
917  "Host: %s\r\n", hoststr);
918  if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
919  len += av_strlcatf(headers + len, sizeof(headers) - len,
920  "Content-Length: %d\r\n", s->post_datalen);
921 
922  if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
923  len += av_strlcatf(headers + len, sizeof(headers) - len,
924  "Content-Type: %s\r\n", s->content_type);
925  if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
926  char *cookies = NULL;
927  if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
928  len += av_strlcatf(headers + len, sizeof(headers) - len,
929  "Cookie: %s\r\n", cookies);
930  av_free(cookies);
931  }
932  }
933  if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
934  len += av_strlcatf(headers + len, sizeof(headers) - len,
935  "Icy-MetaData: %d\r\n", 1);
936 
937  /* now add in custom headers */
938  if (s->headers)
939  av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
940 
941  snprintf(s->buffer, sizeof(s->buffer),
942  "%s %s HTTP/1.1\r\n"
943  "%s"
944  "%s"
945  "%s"
946  "%s%s"
947  "\r\n",
948  method,
949  path,
950  post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
951  headers,
952  authstr ? authstr : "",
953  proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
954 
955  av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer);
956 
957  if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
958  goto done;
959 
960  if (s->post_data)
961  if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
962  goto done;
963 
964  /* init input buffer */
965  s->buf_ptr = s->buffer;
966  s->buf_end = s->buffer;
967  s->line_count = 0;
968  s->off = 0;
969  s->icy_data_read = 0;
970  s->filesize = -1;
971  s->willclose = 0;
972  s->end_chunked_post = 0;
973  s->end_header = 0;
974  if (post && !s->post_data && !send_expect_100) {
975  /* Pretend that it did work. We didn't read any header yet, since
976  * we've still to send the POST data, but the code calling this
977  * function will check http_code after we return. */
978  s->http_code = 200;
979  err = 0;
980  goto done;
981  }
982 
983  /* wait for header */
984  err = http_read_header(h, new_location);
985  if (err < 0)
986  goto done;
987 
988  if (*new_location)
989  s->off = off;
990 
991  err = (off == s->off) ? 0 : -1;
992 done:
993  av_freep(&authstr);
994  av_freep(&proxyauthstr);
995  return err;
996 }
997 
999 {
1000  HTTPContext *s = h->priv_data;
1001  int len;
1002  /* read bytes from input buffer first */
1003  len = s->buf_end - s->buf_ptr;
1004  if (len > 0) {
1005  if (len > size)
1006  len = size;
1007  memcpy(buf, s->buf_ptr, len);
1008  s->buf_ptr += len;
1009  } else {
1010  if ((!s->willclose || s->chunksize < 0) &&
1011  s->filesize >= 0 && s->off >= s->filesize)
1012  return AVERROR_EOF;
1013  len = ffurl_read(s->hd, buf, size);
1014  if (!len && (!s->willclose || s->chunksize < 0) &&
1015  s->filesize >= 0 && s->off < s->filesize) {
1016  av_log(h, AV_LOG_ERROR,
1017  "Stream ends prematurely at %"PRId64", should be %"PRId64"\n",
1018  s->off, s->filesize
1019  );
1020  return AVERROR(EIO);
1021  }
1022  }
1023  if (len > 0) {
1024  s->off += len;
1025  if (s->chunksize > 0)
1026  s->chunksize -= len;
1027  }
1028  return len;
1029 }
1030 
1031 #if CONFIG_ZLIB
1032 #define DECOMPRESS_BUF_SIZE (256 * 1024)
1033 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1034 {
1035  HTTPContext *s = h->priv_data;
1036  int ret;
1037 
1038  if (!s->inflate_buffer) {
1039  s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1040  if (!s->inflate_buffer)
1041  return AVERROR(ENOMEM);
1042  }
1043 
1044  if (s->inflate_stream.avail_in == 0) {
1045  int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1046  if (read <= 0)
1047  return read;
1048  s->inflate_stream.next_in = s->inflate_buffer;
1049  s->inflate_stream.avail_in = read;
1050  }
1051 
1052  s->inflate_stream.avail_out = size;
1053  s->inflate_stream.next_out = buf;
1054 
1055  ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1056  if (ret != Z_OK && ret != Z_STREAM_END)
1057  av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1058  ret, s->inflate_stream.msg);
1059 
1060  return size - s->inflate_stream.avail_out;
1061 }
1062 #endif /* CONFIG_ZLIB */
1063 
1064 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1065 
1066 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1067 {
1068  HTTPContext *s = h->priv_data;
1069  int err, new_location, read_ret, seek_ret;
1070 
1071  if (!s->hd)
1072  return AVERROR_EOF;
1073 
1074  if (s->end_chunked_post && !s->end_header) {
1075  err = http_read_header(h, &new_location);
1076  if (err < 0)
1077  return err;
1078  }
1079 
1080  if (s->chunksize >= 0) {
1081  if (!s->chunksize) {
1082  char line[32];
1083 
1084  do {
1085  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1086  return err;
1087  } while (!*line); /* skip CR LF from last chunk */
1088 
1089  s->chunksize = strtoll(line, NULL, 16);
1090 
1091  av_log(NULL, AV_LOG_TRACE, "Chunked encoding data size: %"PRId64"'\n",
1092  s->chunksize);
1093 
1094  if (!s->chunksize)
1095  return 0;
1096  }
1097  size = FFMIN(size, s->chunksize);
1098  }
1099 #if CONFIG_ZLIB
1100  if (s->compressed)
1101  return http_buf_read_compressed(h, buf, size);
1102 #endif /* CONFIG_ZLIB */
1103  read_ret = http_buf_read(h, buf, size);
1104  if (read_ret < 0 && s->reconnect && !h->is_streamed && s->filesize > 0 && s->off < s->filesize) {
1105  av_log(h, AV_LOG_INFO, "Will reconnect at %"PRId64".\n", s->off);
1106  seek_ret = http_seek_internal(h, s->off, SEEK_SET, 1);
1107  if (seek_ret != s->off) {
1108  av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRId64".\n", s->off);
1109  return read_ret;
1110  }
1111 
1112  read_ret = http_buf_read(h, buf, size);
1113  }
1114 
1115  return read_ret;
1116 }
1117 
1118 // Like http_read_stream(), but no short reads.
1119 // Assumes partial reads are an error.
1120 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1121 {
1122  int pos = 0;
1123  while (pos < size) {
1124  int len = http_read_stream(h, buf + pos, size - pos);
1125  if (len < 0)
1126  return len;
1127  pos += len;
1128  }
1129  return pos;
1130 }
1131 
1132 static void update_metadata(HTTPContext *s, char *data)
1133 {
1134  char *key;
1135  char *val;
1136  char *end;
1137  char *next = data;
1138 
1139  while (*next) {
1140  key = next;
1141  val = strstr(key, "='");
1142  if (!val)
1143  break;
1144  end = strstr(val, "';");
1145  if (!end)
1146  break;
1147 
1148  *val = '\0';
1149  *end = '\0';
1150  val += 2;
1151 
1152  av_dict_set(&s->metadata, key, val, 0);
1153 
1154  next = end + 2;
1155  }
1156 }
1157 
1158 static int store_icy(URLContext *h, int size)
1159 {
1160  HTTPContext *s = h->priv_data;
1161  /* until next metadata packet */
1162  int remaining = s->icy_metaint - s->icy_data_read;
1163 
1164  if (remaining < 0)
1165  return AVERROR_INVALIDDATA;
1166 
1167  if (!remaining) {
1168  /* The metadata packet is variable sized. It has a 1 byte header
1169  * which sets the length of the packet (divided by 16). If it's 0,
1170  * the metadata doesn't change. After the packet, icy_metaint bytes
1171  * of normal data follows. */
1172  uint8_t ch;
1173  int len = http_read_stream_all(h, &ch, 1);
1174  if (len < 0)
1175  return len;
1176  if (ch > 0) {
1177  char data[255 * 16 + 1];
1178  int ret;
1179  len = ch * 16;
1180  ret = http_read_stream_all(h, data, len);
1181  if (ret < 0)
1182  return ret;
1183  data[len + 1] = 0;
1184  if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1185  return ret;
1186  update_metadata(s, data);
1187  }
1188  s->icy_data_read = 0;
1189  remaining = s->icy_metaint;
1190  }
1191 
1192  return FFMIN(size, remaining);
1193 }
1194 
1195 static int http_read(URLContext *h, uint8_t *buf, int size)
1196 {
1197  HTTPContext *s = h->priv_data;
1198 
1199  if (s->icy_metaint > 0) {
1200  size = store_icy(h, size);
1201  if (size < 0)
1202  return size;
1203  }
1204 
1205  size = http_read_stream(h, buf, size);
1206  if (size > 0)
1207  s->icy_data_read += size;
1208  return size;
1209 }
1210 
1211 /* used only when posting data */
1212 static int http_write(URLContext *h, const uint8_t *buf, int size)
1213 {
1214  char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1215  int ret;
1216  char crlf[] = "\r\n";
1217  HTTPContext *s = h->priv_data;
1218 
1219  if (!s->chunked_post) {
1220  /* non-chunked data is sent without any special encoding */
1221  return ffurl_write(s->hd, buf, size);
1222  }
1223 
1224  /* silently ignore zero-size data since chunk encoding that would
1225  * signal EOF */
1226  if (size > 0) {
1227  /* upload data using chunked encoding */
1228  snprintf(temp, sizeof(temp), "%x\r\n", size);
1229 
1230  if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1231  (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1232  (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1233  return ret;
1234  }
1235  return size;
1236 }
1237 
1238 static int http_shutdown(URLContext *h, int flags)
1239 {
1240  int ret = 0;
1241  char footer[] = "0\r\n\r\n";
1242  HTTPContext *s = h->priv_data;
1243 
1244  /* signal end of chunked encoding if used */
1245  if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
1246  ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1247  ret = ret > 0 ? 0 : ret;
1248  s->end_chunked_post = 1;
1249  }
1250 
1251  return ret;
1252 }
1253 
1254 static int http_close(URLContext *h)
1255 {
1256  int ret = 0;
1257  HTTPContext *s = h->priv_data;
1258 
1259 #if CONFIG_ZLIB
1260  inflateEnd(&s->inflate_stream);
1261  av_freep(&s->inflate_buffer);
1262 #endif /* CONFIG_ZLIB */
1263 
1264  if (!s->end_chunked_post)
1265  /* Close the write direction by sending the end of chunked encoding. */
1266  ret = http_shutdown(h, h->flags);
1267 
1268  if (s->hd)
1269  ffurl_closep(&s->hd);
1271  return ret;
1272 }
1273 
1274 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1275 {
1276  HTTPContext *s = h->priv_data;
1277  URLContext *old_hd = s->hd;
1278  int64_t old_off = s->off;
1279  uint8_t old_buf[BUFFER_SIZE];
1280  int old_buf_size, ret;
1281  AVDictionary *options = NULL;
1282 
1283  if (whence == AVSEEK_SIZE)
1284  return s->filesize;
1285  else if (!force_reconnect &&
1286  ((whence == SEEK_CUR && off == 0) ||
1287  (whence == SEEK_SET && off == s->off)))
1288  return s->off;
1289  else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
1290  return AVERROR(ENOSYS);
1291 
1292  if (whence == SEEK_CUR)
1293  off += s->off;
1294  else if (whence == SEEK_END)
1295  off += s->filesize;
1296  else if (whence != SEEK_SET)
1297  return AVERROR(EINVAL);
1298  if (off < 0)
1299  return AVERROR(EINVAL);
1300  s->off = off;
1301 
1302  /* we save the old context in case the seek fails */
1303  old_buf_size = s->buf_end - s->buf_ptr;
1304  memcpy(old_buf, s->buf_ptr, old_buf_size);
1305  s->hd = NULL;
1306 
1307  /* if it fails, continue on old connection */
1308  if ((ret = http_open_cnx(h, &options)) < 0) {
1309  av_dict_free(&options);
1310  memcpy(s->buffer, old_buf, old_buf_size);
1311  s->buf_ptr = s->buffer;
1312  s->buf_end = s->buffer + old_buf_size;
1313  s->hd = old_hd;
1314  s->off = old_off;
1315  return ret;
1316  }
1317  av_dict_free(&options);
1318  ffurl_close(old_hd);
1319  return off;
1320 }
1321 
1322 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1323 {
1324  return http_seek_internal(h, off, whence, 0);
1325 }
1326 
1328 {
1329  HTTPContext *s = h->priv_data;
1330  return ffurl_get_file_handle(s->hd);
1331 }
1332 
1333 #define HTTP_CLASS(flavor) \
1334 static const AVClass flavor ## _context_class = { \
1335  .class_name = # flavor, \
1336  .item_name = av_default_item_name, \
1337  .option = options, \
1338  .version = LIBAVUTIL_VERSION_INT, \
1339 }
1340 
1341 #if CONFIG_HTTP_PROTOCOL
1342 HTTP_CLASS(http);
1343 
1344 URLProtocol ff_http_protocol = {
1345  .name = "http",
1346  .url_open2 = http_open,
1347  .url_read = http_read,
1348  .url_write = http_write,
1349  .url_seek = http_seek,
1350  .url_close = http_close,
1351  .url_get_file_handle = http_get_file_handle,
1352  .url_shutdown = http_shutdown,
1353  .priv_data_size = sizeof(HTTPContext),
1354  .priv_data_class = &http_context_class,
1356 };
1357 #endif /* CONFIG_HTTP_PROTOCOL */
1358 
1359 #if CONFIG_HTTPS_PROTOCOL
1360 HTTP_CLASS(https);
1361 
1362 URLProtocol ff_https_protocol = {
1363  .name = "https",
1364  .url_open2 = http_open,
1365  .url_read = http_read,
1366  .url_write = http_write,
1367  .url_seek = http_seek,
1368  .url_close = http_close,
1369  .url_get_file_handle = http_get_file_handle,
1370  .url_shutdown = http_shutdown,
1371  .priv_data_size = sizeof(HTTPContext),
1372  .priv_data_class = &https_context_class,
1374 };
1375 #endif /* CONFIG_HTTPS_PROTOCOL */
1376 
1377 #if CONFIG_HTTPPROXY_PROTOCOL
1378 static int http_proxy_close(URLContext *h)
1379 {
1380  HTTPContext *s = h->priv_data;
1381  if (s->hd)
1382  ffurl_closep(&s->hd);
1383  return 0;
1384 }
1385 
1386 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1387 {
1388  HTTPContext *s = h->priv_data;
1389  char hostname[1024], hoststr[1024];
1390  char auth[1024], pathbuf[1024], *path;
1391  char lower_url[100];
1392  int port, ret = 0, attempts = 0;
1393  HTTPAuthType cur_auth_type;
1394  char *authstr;
1395  int new_loc;
1396 
1397  if( s->seekable == 1 )
1398  h->is_streamed = 0;
1399  else
1400  h->is_streamed = 1;
1401 
1402  av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1403  pathbuf, sizeof(pathbuf), uri);
1404  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1405  path = pathbuf;
1406  if (*path == '/')
1407  path++;
1408 
1409  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1410  NULL);
1411 redo:
1412  ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1413  &h->interrupt_callback, NULL);
1414  if (ret < 0)
1415  return ret;
1416 
1417  authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1418  path, "CONNECT");
1419  snprintf(s->buffer, sizeof(s->buffer),
1420  "CONNECT %s HTTP/1.1\r\n"
1421  "Host: %s\r\n"
1422  "Connection: close\r\n"
1423  "%s%s"
1424  "\r\n",
1425  path,
1426  hoststr,
1427  authstr ? "Proxy-" : "", authstr ? authstr : "");
1428  av_freep(&authstr);
1429 
1430  if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1431  goto fail;
1432 
1433  s->buf_ptr = s->buffer;
1434  s->buf_end = s->buffer;
1435  s->line_count = 0;
1436  s->filesize = -1;
1437  cur_auth_type = s->proxy_auth_state.auth_type;
1438 
1439  /* Note: This uses buffering, potentially reading more than the
1440  * HTTP header. If tunneling a protocol where the server starts
1441  * the conversation, we might buffer part of that here, too.
1442  * Reading that requires using the proper ffurl_read() function
1443  * on this URLContext, not using the fd directly (as the tls
1444  * protocol does). This shouldn't be an issue for tls though,
1445  * since the client starts the conversation there, so there
1446  * is no extra data that we might buffer up here.
1447  */
1448  ret = http_read_header(h, &new_loc);
1449  if (ret < 0)
1450  goto fail;
1451 
1452  attempts++;
1453  if (s->http_code == 407 &&
1454  (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1455  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1456  ffurl_closep(&s->hd);
1457  goto redo;
1458  }
1459 
1460  if (s->http_code < 400)
1461  return 0;
1462  ret = ff_http_averror(s->http_code, AVERROR(EIO));
1463 
1464 fail:
1465  http_proxy_close(h);
1466  return ret;
1467 }
1468 
1469 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1470 {
1471  HTTPContext *s = h->priv_data;
1472  return ffurl_write(s->hd, buf, size);
1473 }
1474 
1475 URLProtocol ff_httpproxy_protocol = {
1476  .name = "httpproxy",
1477  .url_open = http_proxy_open,
1478  .url_read = http_buf_read,
1479  .url_write = http_proxy_write,
1480  .url_close = http_proxy_close,
1481  .url_get_file_handle = http_get_file_handle,
1482  .priv_data_size = sizeof(HTTPContext),
1483  .flags = URL_PROTOCOL_FLAG_NETWORK,
1484 };
1485 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
static int http_get_line(HTTPContext *s, char *line, int line_size)
Definition: http.c:401
void av_url_split(char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url)
Split a URL string into components.
Definition: utils.c:3886
static void parse_content_range(URLContext *h, const char *p)
Definition: http.c:454
AVDictionary * metadata
Definition: http.c:89
#define NULL
Definition: coverity.c:32
static int http_connect(URLContext *h, const char *path, const char *local_path, const char *hoststr, const char *auth, const char *proxyauth, int *new_location)
Definition: http.c:839
const char const char void * val
Definition: avisynth_c.h:634
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int icy_data_read
Definition: http.c:84
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:35
uint8_t * post_data
Definition: http.c:75
AVOption.
Definition: opt.h:255
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define AV_OPT_FLAG_EXPORT
The option is inteded for exporting values to the caller.
Definition: opt.h:296
HTTPAuthType
Authentication types, ordered from weakest to strongest.
Definition: httpauth.h:28
#define BUFFER_SIZE
Definition: http.c:45
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int http_close(URLContext *h)
Definition: http.c:1254
else temp
Definition: vf_mcdeint.c:257
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:347
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle...
Definition: avstring.c:56
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:46
AVIOInterruptCB interrupt_callback
Definition: url.h:48
HTTPAuthState proxy_auth_state
Definition: http.c:59
#define AVIO_FLAG_READ
read-only
Definition: avio.h:460
char * icy_metadata_headers
Definition: http.c:87
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:461
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
#define AVERROR_HTTP_NOT_FOUND
Definition: error.h:79
int flags
Definition: url.h:44
static int http_listen(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:319
char * content_type
Definition: http.c:63
int version
Definition: avisynth_c.h:629
static int http_getc(HTTPContext *s)
Definition: http.c:384
HTTP Authentication state structure.
Definition: httpauth.h:55
int auth_type
The currently chosen auth type.
Definition: httpauth.h:59
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that's been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:75
#define MAX_URL_SIZE
Definition: internal.h:28
static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
Definition: http.c:525
int end_chunked_post
Definition: http.c:70
int av_stristart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str independent of case.
Definition: avstring.c:45
static int http_get_file_handle(URLContext *h)
Definition: http.c:1327
static int http_buf_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:998
uint8_t
#define av_malloc(s)
int post_datalen
Definition: http.c:76
AVOptions.
int ff_http_averror(int status_code, int default_averror)
Definition: http.c:285
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:330
miscellaneous OS support macros and functions.
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:204
static int http_read_header(URLContext *h, int *new_location)
Definition: http.c:807
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
#define HTTP_HEADERS_SIZE
Definition: http.h:27
int is_akamai
Definition: http.c:77
static int http_open_cnx(URLContext *h, AVDictionary **options)
Definition: http.c:211
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:185
uint32_t tag
Definition: movenc.c:1333
#define DEFAULT_USER_AGENT
Definition: http.c:105
char * av_strndup(const char *s, size_t len)
Duplicate a substring of the string s.
Definition: mem.c:277
#define AVERROR_EOF
End of file.
Definition: error.h:55
void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
Initialize the authentication state based on another HTTP URLContext.
Definition: http.c:140
HTTP 1.0 Basic auth from RFC 1945 (also in RFC 2617)
Definition: httpauth.h:30
ptrdiff_t size
Definition: opengl_enc.c:101
static const uint8_t header[24]
Definition: sdr2.c:67
static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
Definition: http.c:150
int line_count
Definition: http.c:52
void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:213
#define av_log(a,...)
unsigned char * buf_end
Definition: http.c:51
static void update_metadata(HTTPContext *s, char *data)
Definition: http.c:1132
int chunked_post
Definition: http.c:68
static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
Definition: http.c:1274
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define E
Definition: http.c:104
#define AVERROR(e)
Definition: error.h:43
static int http_write(URLContext *h, const uint8_t *buf, int size)
Definition: http.c:1212
static const AVOption options[]
Definition: http.c:107
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
Definition: graph2dot.c:48
#define OFFSET(x)
Definition: http.c:102
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
AVDictionary * chained_options
Definition: http.c:95
#define AVERROR_HTTP_SERVER_ERROR
Definition: error.h:81
static int store_icy(URLContext *h, int size)
Definition: http.c:1158
char * headers
Definition: http.c:60
char * user_agent
Definition: http.c:62
#define AVERROR_HTTP_UNAUTHORIZED
Definition: error.h:77
char * icy_metadata_packet
Definition: http.c:88
char method[16]
Definition: ffserver.c:168
#define FFMIN(a, b)
Definition: common.h:66
int64_t off
Definition: http.c:56
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
ret
Definition: avfilter.c:974
int64_t end_off
Definition: http.c:56
int send_expect_100
Definition: http.c:96
int willclose
Definition: http.c:66
int is_mediagateway
Definition: http.c:78
int reconnect
Definition: http.c:98
int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
Definition: network.c:292
int ffurl_get_file_handle(URLContext *h)
Return the file descriptor associated with this URL.
Definition: avio.c:512
AVDictionary * cookie_dict
Definition: http.c:81
int stale
Auth ok, but needs to be resent with a new nonce.
Definition: httpauth.h:71
offset must point to a pointer immediately followed by an int for the length
Definition: opt.h:229
int is_connected
Definition: url.h:47
int ffurl_closep(URLContext **hh)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:370
int ff_url_join(char *str, int size, const char *proto, const char *authorization, const char *hostname, int port, const char *fmt,...)
Definition: url.c:36
static int http_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1195
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AVS_Value src
Definition: avisynth_c.h:482
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
int seekable
Control seekability, 0 = disable, 1 = enable, -1 = probe.
Definition: http.c:67
void * buf
Definition: avisynth_c.h:553
Definition: url.h:39
#define AVIO_FLAG_READ_WRITE
read-write pseudo flag
Definition: avio.h:462
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
Describe the class of an AVClass context structure.
Definition: log.h:67
#define SPACE_CHARS
Definition: internal.h:211
void * priv_data
Definition: url.h:42
#define AVERROR_HTTP_OTHER_4XX
Definition: error.h:80
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
#define snprintf
Definition: snprintf.h:34
int icy
Definition: http.c:82
char * ff_http_auth_create_response(HTTPAuthState *state, const char *auth, const char *path, const char *method)
Definition: httpauth.c:245
const char * name
Definition: url.h:53
URLContext * hd
Definition: http.c:50
static int has_header(const char *str, const char *header)
Definition: http.c:799
char * mime_type
Definition: http.c:61
#define AVERROR_HTTP_FORBIDDEN
Definition: error.h:78
static int flags
Definition: cpu.c:47
int ffurl_close(URLContext *h)
Definition: avio.c:392
static int process_line(URLContext *h, char *line, int line_count, int *new_location)
Definition: http.c:562
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:267
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
Main libavformat public API header.
char * cookies
holds newline ( ) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) ...
Definition: http.c:79
#define MAX_REDIRECTS
Definition: http.c:46
static int parse_content_encoding(URLContext *h, const char *p)
Definition: http.c:469
int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:272
static int get_cookies(HTTPContext *s, char **cookies, const char *path, const char *domain)
Create a string containing cookie values for use as a HTTP cookie header field value for a particular...
Definition: http.c:702
int http_code
Definition: http.c:53
int listen
Definition: http.c:99
static int http_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:350
#define AVSEEK_SIZE
Passing this as the "whence" parameter to a seek function causes it to return the filesize without se...
Definition: avio.h:339
char * key
Definition: dict.h:87
void ff_http_auth_handle_header(HTTPAuthState *state, const char *key, const char *value)
Definition: httpauth.c:90
int multiple_requests
Definition: http.c:74
HTTPAuthState auth_state
Definition: http.c:58
#define av_free(p)
static int cookie_string(AVDictionary *dict, char **cookies)
Definition: http.c:539
char * value
Definition: dict.h:88
int len
static int parse_location(HTTPContext *s, const char *p)
Definition: http.c:440
uint8_t * buffer
Definition: ffserver.c:171
int64_t filesize
Definition: http.c:56
char * location
Definition: http.c:57
static int http_shutdown(URLContext *h, int flags)
Definition: http.c:1238
int icy_metaint
Definition: http.c:86
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:301
int end_header
Definition: http.c:72
unsigned char * buf_ptr
Definition: http.c:51
#define D
Definition: http.c:103
#define AVERROR_HTTP_BAD_REQUEST
Definition: error.h:76
char * method
Definition: http.c:97
static int parse_icy(HTTPContext *s, const char *tag, const char *p)
Definition: http.c:503
static int http_read_stream(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1066
#define av_freep(p)
static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1120
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:72
unbuffered private I/O API
static void handle_http_errors(URLContext *h, int error)
Definition: http.c:302
static int64_t http_seek(URLContext *h, int64_t off, int whence)
Definition: http.c:1322
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:369
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:333
int64_t chunksize
Definition: http.c:55
GLuint buffer
Definition: opengl_enc.c:102
#define HTTP_CLASS(flavor)
Definition: http.c:1333
No authentication specified.
Definition: httpauth.h:29
static int check_http_code(URLContext *h, int http_code, const char *end)
Definition: http.c:425
const char * name
Definition: opengl_enc.c:103