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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 <stdbool.h>
23 
24 #include "config.h"
25 #include "config_components.h"
26 
27 #include <time.h>
28 #if CONFIG_ZLIB
29 #include <zlib.h>
30 #endif /* CONFIG_ZLIB */
31 
32 #include "libavutil/avassert.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/bprint.h"
35 #include "libavutil/getenv_utf8.h"
36 #include "libavutil/macros.h"
37 #include "libavutil/mem.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/time.h"
40 #include "libavutil/parseutils.h"
41 
42 #include "avformat.h"
43 #include "http.h"
44 #include "httpauth.h"
45 #include "internal.h"
46 #include "network.h"
47 #include "os_support.h"
48 #include "url.h"
49 #include "version.h"
50 
51 /* XXX: POST protocol is not completely implemented because ffmpeg uses
52  * only a subset of it. */
53 
54 /* The IO buffer size is unrelated to the max URL size in itself, but needs
55  * to be large enough to fit the full request headers (including long
56  * path names). */
57 #define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)
58 #define MAX_REDIRECTS 8
59 #define MAX_CACHED_REDIRECTS 32
60 #define HTTP_SINGLE 1
61 #define HTTP_MUTLI 2
62 #define MAX_DATE_LEN 19
63 #define WHITESPACES " \n\t\r"
64 typedef enum {
65  LOWER_PROTO,
66  READ_HEADERS,
67  WRITE_REPLY_HEADERS,
68  FINISH
69 }HandshakeState;
70 
71 typedef struct HTTPContext {
72  const AVClass *class;
73  URLContext *hd;
74  unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
75  int line_count;
76  int http_code;
77  /* Used if "Transfer-Encoding: chunked" otherwise -1. */
78  uint64_t chunksize;
79  int chunkend;
80  uint64_t off, end_off, filesize;
81  char *uri;
82  char *location;
83  HTTPAuthState auth_state;
84  HTTPAuthState proxy_auth_state;
85  char *http_proxy;
86  char *headers;
87  char *mime_type;
88  char *http_version;
89  char *user_agent;
90  char *referer;
91  char *content_type;
92  /* Set if the server correctly handles Connection: close and will close
93  * the connection after feeding us the content. */
94  int willclose;
95  int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
96  int chunked_post;
97  /* A flag which indicates if the end of chunked encoding has been sent. */
98  int end_chunked_post;
99  /* A flag which indicates we have finished to read POST reply. */
100  int end_header;
101  /* A flag which indicates if we use persistent connections. */
102  int multiple_requests;
103  uint8_t *post_data;
104  int post_datalen;
105  int is_akamai;
106  int is_mediagateway;
107  char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
108  /* A dictionary containing cookies keyed by cookie name */
109  AVDictionary *cookie_dict;
110  int icy;
111  /* how much data was read since the last ICY metadata packet */
112  uint64_t icy_data_read;
113  /* after how many bytes of read data a new metadata packet will be found */
114  uint64_t icy_metaint;
115  char *icy_metadata_headers;
116  char *icy_metadata_packet;
117  AVDictionary *metadata;
118 #if CONFIG_ZLIB
119  int compressed;
120  z_stream inflate_stream;
121  uint8_t *inflate_buffer;
122 #endif /* CONFIG_ZLIB */
123  AVDictionary *chained_options;
124  /* -1 = try to send if applicable, 0 = always disabled, 1 = always enabled */
125  int send_expect_100;
126  char *method;
127  int reconnect;
128  int reconnect_at_eof;
129  int reconnect_on_network_error;
130  int reconnect_streamed;
131  int reconnect_delay_max;
132  char *reconnect_on_http_error;
133  int listen;
134  char *resource;
135  int reply_code;
136  int is_multi_client;
137  HandshakeState handshake_step;
138  int is_connected_server;
139  int short_seek_size;
140  int64_t expires;
141  char *new_location;
142  AVDictionary *redirect_cache;
143  uint64_t filesize_from_content_range;
144  int respect_retry_after;
145  unsigned int retry_after;
146  int reconnect_max_retries;
147  int reconnect_delay_total_max;
148 } HTTPContext;
149 
150 #define OFFSET(x) offsetof(HTTPContext, x)
151 #define D AV_OPT_FLAG_DECODING_PARAM
152 #define E AV_OPT_FLAG_ENCODING_PARAM
153 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
154 
155 static const AVOption options[] = {
156  { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D },
157  { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
158  { "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
159  { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
160  { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
161  { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
162  { "referer", "override referer header", OFFSET(referer), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
163  { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D | E },
164  { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
165  { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
166  { "http_version", "export the http response version", OFFSET(http_version), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
167  { "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, { .str = NULL }, 0, 0, D },
168  { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
169  { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
170  { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
171  { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
172  { "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, .unit = "auth_type"},
173  { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, .unit = "auth_type"},
174  { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, .unit = "auth_type"},
175  { "send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, E },
176  { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
177  { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
178  { "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 },
179  { "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 },
180  { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
181  { "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
182  { "reconnect_on_network_error", "auto reconnect in case of tcp/tls error during connect", OFFSET(reconnect_on_network_error), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
183  { "reconnect_on_http_error", "list of http status codes to reconnect on", OFFSET(reconnect_on_http_error), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
184  { "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
185  { "reconnect_delay_max", "max reconnect delay in seconds after which to give up", OFFSET(reconnect_delay_max), AV_OPT_TYPE_INT, { .i64 = 120 }, 0, UINT_MAX/1000/1000, D },
186  { "reconnect_max_retries", "the max number of times to retry a connection", OFFSET(reconnect_max_retries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D },
187  { "reconnect_delay_total_max", "max total reconnect delay in seconds after which to give up", OFFSET(reconnect_delay_total_max), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, UINT_MAX/1000/1000, D },
188  { "respect_retry_after", "respect the Retry-After header when retrying connections", OFFSET(respect_retry_after), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
189  { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E },
190  { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
191  { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E},
192  { "short_seek_size", "Threshold to favor readahead over seek.", OFFSET(short_seek_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
193  { NULL }
194 };
195 
196 static int http_connect(URLContext *h, const char *path, const char *local_path,
197  const char *hoststr, const char *auth,
198  const char *proxyauth);
199 static int http_read_header(URLContext *h);
200 static int http_shutdown(URLContext *h, int flags);
201 
202 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
203 {
204  memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
205  &((HTTPContext *)src->priv_data)->auth_state,
206  sizeof(HTTPAuthState));
207  memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
208  &((HTTPContext *)src->priv_data)->proxy_auth_state,
209  sizeof(HTTPAuthState));
210 }
211 
212 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
213 {
214  const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
215  char *env_http_proxy, *env_no_proxy;
216  char *hashmark;
217  char hostname[1024], hoststr[1024], proto[10];
218  char auth[1024], proxyauth[1024] = "";
219  char path1[MAX_URL_SIZE], sanitized_path[MAX_URL_SIZE + 1];
220  char buf[1024], urlbuf[MAX_URL_SIZE];
221  int port, use_proxy, err = 0;
222  HTTPContext *s = h->priv_data;
223 
224  av_url_split(proto, sizeof(proto), auth, sizeof(auth),
225  hostname, sizeof(hostname), &port,
226  path1, sizeof(path1), s->location);
227  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
228 
229  env_http_proxy = getenv_utf8("http_proxy");
230  proxy_path = s->http_proxy ? s->http_proxy : env_http_proxy;
231 
232  env_no_proxy = getenv_utf8("no_proxy");
233  use_proxy = !ff_http_match_no_proxy(env_no_proxy, hostname) &&
234  proxy_path && av_strstart(proxy_path, "http://", NULL);
235  freeenv_utf8(env_no_proxy);
236 
237  if (!strcmp(proto, "https")) {
238  lower_proto = "tls";
239  use_proxy = 0;
240  if (port < 0)
241  port = 443;
242  /* pass http_proxy to underlying protocol */
243  if (s->http_proxy) {
244  err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
245  if (err < 0)
246  goto end;
247  }
248  }
249  if (port < 0)
250  port = 80;
251 
252  hashmark = strchr(path1, '#');
253  if (hashmark)
254  *hashmark = '\0';
255 
256  if (path1[0] == '\0') {
257  path = "/";
258  } else if (path1[0] == '?') {
259  snprintf(sanitized_path, sizeof(sanitized_path), "/%s", path1);
260  path = sanitized_path;
261  } else {
262  path = path1;
263  }
264  local_path = path;
265  if (use_proxy) {
266  /* Reassemble the request URL without auth string - we don't
267  * want to leak the auth to the proxy. */
268  ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
269  path1);
270  path = urlbuf;
271  av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
272  hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
273  }
274 
275  ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
276 
277  if (!s->hd) {
278  err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
279  &h->interrupt_callback, options,
280  h->protocol_whitelist, h->protocol_blacklist, h);
281  }
282 
283 end:
284  freeenv_utf8(env_http_proxy);
285  return err < 0 ? err : http_connect(
286  h, path, local_path, hoststr, auth, proxyauth);
287 }
288 
289 static int http_should_reconnect(HTTPContext *s, int err)
290 {
291  const char *status_group;
292  char http_code[4];
293 
294  switch (err) {
295  case AVERROR_HTTP_BAD_REQUEST:
296  case AVERROR_HTTP_UNAUTHORIZED:
297  case AVERROR_HTTP_FORBIDDEN:
298  case AVERROR_HTTP_NOT_FOUND:
299  case AVERROR_HTTP_TOO_MANY_REQUESTS:
300  case AVERROR_HTTP_OTHER_4XX:
301  status_group = "4xx";
302  break;
303 
304  case AVERROR_HTTP_SERVER_ERROR:
305  status_group = "5xx";
306  break;
307 
308  default:
309  return s->reconnect_on_network_error;
310  }
311 
312  if (!s->reconnect_on_http_error)
313  return 0;
314 
315  if (av_match_list(status_group, s->reconnect_on_http_error, ',') > 0)
316  return 1;
317 
318  snprintf(http_code, sizeof(http_code), "%d", s->http_code);
319 
320  return av_match_list(http_code, s->reconnect_on_http_error, ',') > 0;
321 }
322 
323 static char *redirect_cache_get(HTTPContext *s)
324 {
325  AVDictionaryEntry *re;
326  int64_t expiry;
327  char *delim;
328 
329  re = av_dict_get(s->redirect_cache, s->location, NULL, AV_DICT_MATCH_CASE);
330  if (!re) {
331  return NULL;
332  }
333 
334  delim = strchr(re->value, ';');
335  if (!delim) {
336  return NULL;
337  }
338 
339  expiry = strtoll(re->value, NULL, 10);
340  if (time(NULL) > expiry) {
341  return NULL;
342  }
343 
344  return delim + 1;
345 }
346 
347 static int redirect_cache_set(HTTPContext *s, const char *source, const char *dest, int64_t expiry)
348 {
349  char *value;
350  int ret;
351 
352  value = av_asprintf("%"PRIi64";%s", expiry, dest);
353  if (!value) {
354  return AVERROR(ENOMEM);
355  }
356 
357  ret = av_dict_set(&s->redirect_cache, source, value, AV_DICT_MATCH_CASE | AV_DICT_DONT_STRDUP_VAL);
358  if (ret < 0)
359  return ret;
360 
361  return 0;
362 }
363 
364 /* return non zero if error */
365 static int http_open_cnx(URLContext *h, AVDictionary **options)
366 {
367  HTTPAuthType cur_auth_type, cur_proxy_auth_type;
368  HTTPContext *s = h->priv_data;
369  int ret, conn_attempts = 1, auth_attempts = 0, redirects = 0;
370  int reconnect_delay = 0;
371  int reconnect_delay_total = 0;
372  uint64_t off;
373  char *cached;
374 
375 redo:
376 
377  cached = redirect_cache_get(s);
378  if (cached) {
379  av_free(s->location);
380  s->location = av_strdup(cached);
381  if (!s->location) {
382  ret = AVERROR(ENOMEM);
383  goto fail;
384  }
385  goto redo;
386  }
387 
388  av_dict_copy(options, s->chained_options, 0);
389 
390  cur_auth_type = s->auth_state.auth_type;
391  cur_proxy_auth_type = s->auth_state.auth_type;
392 
393  off = s->off;
394  ret = http_open_cnx_internal(h, options);
395  if (ret < 0) {
396  if (!http_should_reconnect(s, ret) ||
397  reconnect_delay > s->reconnect_delay_max ||
398  (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
399  reconnect_delay_total > s->reconnect_delay_total_max)
400  goto fail;
401 
402  /* Both fields here are in seconds. */
403  if (s->respect_retry_after && s->retry_after > 0) {
404  reconnect_delay = s->retry_after;
405  if (reconnect_delay > s->reconnect_delay_max)
406  goto fail;
407  s->retry_after = 0;
408  }
409 
410  av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s).\n", off, reconnect_delay);
411  ret = ff_network_sleep_interruptible(1000U * 1000 * reconnect_delay, &h->interrupt_callback);
412  if (ret != AVERROR(ETIMEDOUT))
413  goto fail;
414  reconnect_delay_total += reconnect_delay;
415  reconnect_delay = 1 + 2 * reconnect_delay;
416  conn_attempts++;
417 
418  /* restore the offset (http_connect resets it) */
419  s->off = off;
420 
421  ffurl_closep(&s->hd);
422  goto redo;
423  }
424 
425  auth_attempts++;
426  if (s->http_code == 401) {
427  if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
428  s->auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
429  ffurl_closep(&s->hd);
430  goto redo;
431  } else
432  goto fail;
433  }
434  if (s->http_code == 407) {
435  if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
436  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
437  ffurl_closep(&s->hd);
438  goto redo;
439  } else
440  goto fail;
441  }
442  if ((s->http_code == 301 || s->http_code == 302 ||
443  s->http_code == 303 || s->http_code == 307 || s->http_code == 308) &&
444  s->new_location) {
445  /* url moved, get next */
446  ffurl_closep(&s->hd);
447  if (redirects++ >= MAX_REDIRECTS)
448  return AVERROR(EIO);
449 
450  if (!s->expires) {
451  s->expires = (s->http_code == 301 || s->http_code == 308) ? INT64_MAX : -1;
452  }
453 
454  if (s->expires > time(NULL) && av_dict_count(s->redirect_cache) < MAX_CACHED_REDIRECTS) {
455  redirect_cache_set(s, s->location, s->new_location, s->expires);
456  }
457 
458  av_free(s->location);
459  s->location = s->new_location;
460  s->new_location = NULL;
461 
462  /* Restart the authentication process with the new target, which
463  * might use a different auth mechanism. */
464  memset(&s->auth_state, 0, sizeof(s->auth_state));
465  auth_attempts = 0;
466  goto redo;
467  }
468  return 0;
469 
470 fail:
471  if (s->hd)
472  ffurl_closep(&s->hd);
473  if (ret < 0)
474  return ret;
475  return ff_http_averror(s->http_code, AVERROR(EIO));
476 }
477 
478 int ff_http_do_new_request(URLContext *h, const char *uri) {
479  return ff_http_do_new_request2(h, uri, NULL);
480 }
481 
482 int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
483 {
484  HTTPContext *s = h->priv_data;
485  AVDictionary *options = NULL;
486  int ret;
487  char hostname1[1024], hostname2[1024], proto1[10], proto2[10];
488  int port1, port2;
489 
490  if (!h->prot ||
491  !(!strcmp(h->prot->name, "http") ||
492  !strcmp(h->prot->name, "https")))
493  return AVERROR(EINVAL);
494 
495  av_url_split(proto1, sizeof(proto1), NULL, 0,
496  hostname1, sizeof(hostname1), &port1,
497  NULL, 0, s->location);
498  av_url_split(proto2, sizeof(proto2), NULL, 0,
499  hostname2, sizeof(hostname2), &port2,
500  NULL, 0, uri);
501  if (strcmp(proto1, proto2) != 0) {
502  av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different protocol %s vs %s\n",
503  proto1, proto2);
504  return AVERROR(EINVAL);
505  }
506  if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
507  av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
508  hostname1, port1,
509  hostname2, port2
510  );
511  return AVERROR(EINVAL);
512  }
513 
514  if (!s->end_chunked_post) {
515  ret = http_shutdown(h, h->flags);
516  if (ret < 0)
517  return ret;
518  }
519 
520  if (s->willclose)
521  return AVERROR_EOF;
522 
523  s->end_chunked_post = 0;
524  s->chunkend = 0;
525  s->off = 0;
526  s->icy_data_read = 0;
527 
528  av_free(s->location);
529  s->location = av_strdup(uri);
530  if (!s->location)
531  return AVERROR(ENOMEM);
532 
533  av_free(s->uri);
534  s->uri = av_strdup(uri);
535  if (!s->uri)
536  return AVERROR(ENOMEM);
537 
538  if ((ret = av_opt_set_dict(s, opts)) < 0)
539  return ret;
540 
541  av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
542  ret = http_open_cnx(h, &options);
543  av_dict_free(&options);
544  return ret;
545 }
546 
547 int ff_http_averror(int status_code, int default_averror)
548 {
549  switch (status_code) {
550  case 400: return AVERROR_HTTP_BAD_REQUEST;
551  case 401: return AVERROR_HTTP_UNAUTHORIZED;
552  case 403: return AVERROR_HTTP_FORBIDDEN;
553  case 404: return AVERROR_HTTP_NOT_FOUND;
554  case 429: return AVERROR_HTTP_TOO_MANY_REQUESTS;
555  default: break;
556  }
557  if (status_code >= 400 && status_code <= 499)
558  return AVERROR_HTTP_OTHER_4XX;
559  else if (status_code >= 500)
560  return AVERROR_HTTP_SERVER_ERROR;
561  else
562  return default_averror;
563 }
564 
565 static int http_write_reply(URLContext* h, int status_code)
566 {
567  int ret, body = 0, reply_code, message_len;
568  const char *reply_text, *content_type;
569  HTTPContext *s = h->priv_data;
570  char message[BUFFER_SIZE];
571  content_type = "text/plain";
572 
573  if (status_code < 0)
574  body = 1;
575  switch (status_code) {
576  case AVERROR_HTTP_BAD_REQUEST:
577  case 400:
578  reply_code = 400;
579  reply_text = "Bad Request";
580  break;
581  case AVERROR_HTTP_FORBIDDEN:
582  case 403:
583  reply_code = 403;
584  reply_text = "Forbidden";
585  break;
586  case AVERROR_HTTP_NOT_FOUND:
587  case 404:
588  reply_code = 404;
589  reply_text = "Not Found";
590  break;
591  case AVERROR_HTTP_TOO_MANY_REQUESTS:
592  case 429:
593  reply_code = 429;
594  reply_text = "Too Many Requests";
595  break;
596  case 200:
597  reply_code = 200;
598  reply_text = "OK";
599  content_type = s->content_type ? s->content_type : "application/octet-stream";
600  break;
601  case AVERROR_HTTP_SERVER_ERROR:
602  case 500:
603  reply_code = 500;
604  reply_text = "Internal server error";
605  break;
606  default:
607  return AVERROR(EINVAL);
608  }
609  if (body) {
610  s->chunked_post = 0;
611  message_len = snprintf(message, sizeof(message),
612  "HTTP/1.1 %03d %s\r\n"
613  "Content-Type: %s\r\n"
614  "Content-Length: %"SIZE_SPECIFIER"\r\n"
615  "%s"
616  "\r\n"
617  "%03d %s\r\n",
618  reply_code,
619  reply_text,
620  content_type,
621  strlen(reply_text) + 6, // 3 digit status code + space + \r\n
622  s->headers ? s->headers : "",
623  reply_code,
624  reply_text);
625  } else {
626  s->chunked_post = 1;
627  message_len = snprintf(message, sizeof(message),
628  "HTTP/1.1 %03d %s\r\n"
629  "Content-Type: %s\r\n"
630  "Transfer-Encoding: chunked\r\n"
631  "%s"
632  "\r\n",
633  reply_code,
634  reply_text,
635  content_type,
636  s->headers ? s->headers : "");
637  }
638  av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
639  if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
640  return ret;
641  return 0;
642 }
643 
644 static void handle_http_errors(URLContext *h, int error)
645 {
646  av_assert0(error < 0);
647  http_write_reply(h, error);
648 }
649 
650 static int http_handshake(URLContext *c)
651 {
652  int ret, err;
653  HTTPContext *ch = c->priv_data;
654  URLContext *cl = ch->hd;
655  switch (ch->handshake_step) {
656  case LOWER_PROTO:
657  av_log(c, AV_LOG_TRACE, "Lower protocol\n");
658  if ((ret = ffurl_handshake(cl)) > 0)
659  return 2 + ret;
660  if (ret < 0)
661  return ret;
662  ch->handshake_step = READ_HEADERS;
663  ch->is_connected_server = 1;
664  return 2;
665  case READ_HEADERS:
666  av_log(c, AV_LOG_TRACE, "Read headers\n");
667  if ((err = http_read_header(c)) < 0) {
668  handle_http_errors(c, err);
669  return err;
670  }
671  ch->handshake_step = WRITE_REPLY_HEADERS;
672  return 1;
673  case WRITE_REPLY_HEADERS:
674  av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
675  if ((err = http_write_reply(c, ch->reply_code)) < 0)
676  return err;
677  ch->handshake_step = FINISH;
678  return 1;
679  case FINISH:
680  return 0;
681  }
682  // this should never be reached.
683  return AVERROR(EINVAL);
684 }
685 
686 static int http_listen(URLContext *h, const char *uri, int flags,
687  AVDictionary **options) {
688  HTTPContext *s = h->priv_data;
689  int ret;
690  char hostname[1024], proto[10];
691  char lower_url[100];
692  const char *lower_proto = "tcp";
693  int port;
694  av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
695  NULL, 0, uri);
696  if (!strcmp(proto, "https"))
697  lower_proto = "tls";
698  ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
699  NULL);
700  if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
701  goto fail;
702  if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
703  &h->interrupt_callback, options,
704  h->protocol_whitelist, h->protocol_blacklist, h
705  )) < 0)
706  goto fail;
707  s->handshake_step = LOWER_PROTO;
708  if (s->listen == HTTP_SINGLE) { /* single client */
709  s->reply_code = 200;
710  while ((ret = http_handshake(h)) > 0);
711  }
712 fail:
713  av_dict_free(&s->chained_options);
714  av_dict_free(&s->cookie_dict);
715  return ret;
716 }
717 
718 static int http_open(URLContext *h, const char *uri, int flags,
719  AVDictionary **options)
720 {
721  HTTPContext *s = h->priv_data;
722  int ret;
723 
724  if( s->seekable == 1 )
725  h->is_streamed = 0;
726  else
727  h->is_streamed = 1;
728 
729  s->filesize = UINT64_MAX;
730 
731  s->location = av_strdup(uri);
732  if (!s->location)
733  return AVERROR(ENOMEM);
734 
735  s->uri = av_strdup(uri);
736  if (!s->uri)
737  return AVERROR(ENOMEM);
738 
739  if (options)
740  av_dict_copy(&s->chained_options, *options, 0);
741 
742  if (s->headers) {
743  int len = strlen(s->headers);
744  if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
745  av_log(h, AV_LOG_WARNING,
746  "No trailing CRLF found in HTTP header. Adding it.\n");
747  ret = av_reallocp(&s->headers, len + 3);
748  if (ret < 0)
749  goto bail_out;
750  s->headers[len] = '\r';
751  s->headers[len + 1] = '\n';
752  s->headers[len + 2] = '\0';
753  }
754  }
755 
756  if (s->listen) {
757  return http_listen(h, uri, flags, options);
758  }
759  ret = http_open_cnx(h, options);
760 bail_out:
761  if (ret < 0) {
762  av_dict_free(&s->chained_options);
763  av_dict_free(&s->cookie_dict);
764  av_dict_free(&s->redirect_cache);
765  av_freep(&s->new_location);
766  av_freep(&s->uri);
767  }
768  return ret;
769 }
770 
771 static int http_accept(URLContext *s, URLContext **c)
772 {
773  int ret;
774  HTTPContext *sc = s->priv_data;
775  HTTPContext *cc;
776  URLContext *sl = sc->hd;
777  URLContext *cl = NULL;
778 
779  av_assert0(sc->listen);
780  if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
781  goto fail;
782  cc = (*c)->priv_data;
783  if ((ret = ffurl_accept(sl, &cl)) < 0)
784  goto fail;
785  cc->hd = cl;
786  cc->is_multi_client = 1;
787  return 0;
788 fail:
789  if (c) {
790  ffurl_closep(c);
791  }
792  return ret;
793 }
794 
795 static int http_getc(HTTPContext *s)
796 {
797  int len;
798  if (s->buf_ptr >= s->buf_end) {
799  len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
800  if (len < 0) {
801  return len;
802  } else if (len == 0) {
803  return AVERROR_EOF;
804  } else {
805  s->buf_ptr = s->buffer;
806  s->buf_end = s->buffer + len;
807  }
808  }
809  return *s->buf_ptr++;
810 }
811 
812 static int http_get_line(HTTPContext *s, char *line, int line_size)
813 {
814  int ch;
815  char *q;
816 
817  q = line;
818  for (;;) {
819  ch = http_getc(s);
820  if (ch < 0)
821  return ch;
822  if (ch == '\n') {
823  /* process line */
824  if (q > line && q[-1] == '\r')
825  q--;
826  *q = '\0';
827 
828  return 0;
829  } else {
830  if ((q - line) < line_size - 1)
831  *q++ = ch;
832  }
833  }
834 }
835 
836 static int check_http_code(URLContext *h, int http_code, const char *end)
837 {
838  HTTPContext *s = h->priv_data;
839  /* error codes are 4xx and 5xx, but regard 401 as a success, so we
840  * don't abort until all headers have been parsed. */
841  if (http_code >= 400 && http_code < 600 &&
842  (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
843  (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
844  end += strspn(end, SPACE_CHARS);
845  av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
846  return ff_http_averror(http_code, AVERROR(EIO));
847  }
848  return 0;
849 }
850 
851 static int parse_location(HTTPContext *s, const char *p)
852 {
853  char redirected_location[MAX_URL_SIZE];
854  ff_make_absolute_url(redirected_location, sizeof(redirected_location),
855  s->location, p);
856  av_freep(&s->new_location);
857  s->new_location = av_strdup(redirected_location);
858  if (!s->new_location)
859  return AVERROR(ENOMEM);
860  return 0;
861 }
862 
863 /* "bytes $from-$to/$document_size" */
864 static void parse_content_range(URLContext *h, const char *p)
865 {
866  HTTPContext *s = h->priv_data;
867  const char *slash;
868 
869  if (!strncmp(p, "bytes ", 6)) {
870  p += 6;
871  s->off = strtoull(p, NULL, 10);
872  if ((slash = strchr(p, '/')) && strlen(slash) > 0)
873  s->filesize_from_content_range = strtoull(slash + 1, NULL, 10);
874  }
875  if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
876  h->is_streamed = 0; /* we _can_ in fact seek */
877 }
878 
879 static int parse_content_encoding(URLContext *h, const char *p)
880 {
881  if (!av_strncasecmp(p, "gzip", 4) ||
882  !av_strncasecmp(p, "deflate", 7)) {
883 #if CONFIG_ZLIB
884  HTTPContext *s = h->priv_data;
885 
886  s->compressed = 1;
887  inflateEnd(&s->inflate_stream);
888  if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
889  av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
890  s->inflate_stream.msg);
891  return AVERROR(ENOSYS);
892  }
893  if (zlibCompileFlags() & (1 << 17)) {
894  av_log(h, AV_LOG_WARNING,
895  "Your zlib was compiled without gzip support.\n");
896  return AVERROR(ENOSYS);
897  }
898 #else
899  av_log(h, AV_LOG_WARNING,
900  "Compressed (%s) content, need zlib with gzip support\n", p);
901  return AVERROR(ENOSYS);
902 #endif /* CONFIG_ZLIB */
903  } else if (!av_strncasecmp(p, "identity", 8)) {
904  // The normal, no-encoding case (although servers shouldn't include
905  // the header at all if this is the case).
906  } else {
907  av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
908  }
909  return 0;
910 }
911 
912 // Concat all Icy- header lines
913 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
914 {
915  int len = 4 + strlen(p) + strlen(tag);
916  int is_first = !s->icy_metadata_headers;
917  int ret;
918 
919  av_dict_set(&s->metadata, tag, p, 0);
920 
921  if (s->icy_metadata_headers)
922  len += strlen(s->icy_metadata_headers);
923 
924  if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
925  return ret;
926 
927  if (is_first)
928  *s->icy_metadata_headers = '\0';
929 
930  av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
931 
932  return 0;
933 }
934 
935 static int parse_http_date(const char *date_str, struct tm *buf)
936 {
937  char date_buf[MAX_DATE_LEN];
938  int i, j, date_buf_len = MAX_DATE_LEN-1;
939  char *date;
940 
941  // strip off any punctuation or whitespace
942  for (i = 0, j = 0; date_str[i] != '\0' && j < date_buf_len; i++) {
943  if ((date_str[i] >= '0' && date_str[i] <= '9') ||
944  (date_str[i] >= 'A' && date_str[i] <= 'Z') ||
945  (date_str[i] >= 'a' && date_str[i] <= 'z')) {
946  date_buf[j] = date_str[i];
947  j++;
948  }
949  }
950  date_buf[j] = '\0';
951  date = date_buf;
952 
953  // move the string beyond the day of week
954  while ((*date < '0' || *date > '9') && *date != '\0')
955  date++;
956 
957  return av_small_strptime(date, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
958 }
959 
960 static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
961 {
962  char *param, *next_param, *cstr, *back;
963  char *saveptr = NULL;
964 
965  if (!set_cookie[0])
966  return 0;
967 
968  if (!(cstr = av_strdup(set_cookie)))
969  return AVERROR(EINVAL);
970 
971  // strip any trailing whitespace
972  back = &cstr[strlen(cstr)-1];
973  while (strchr(WHITESPACES, *back)) {
974  *back='\0';
975  if (back == cstr)
976  break;
977  back--;
978  }
979 
980  next_param = cstr;
981  while ((param = av_strtok(next_param, ";", &saveptr))) {
982  char *name, *value;
983  next_param = NULL;
984  param += strspn(param, WHITESPACES);
985  if ((name = av_strtok(param, "=", &value))) {
986  if (av_dict_set(dict, name, value, 0) < 0) {
987  av_free(cstr);
988  return -1;
989  }
990  }
991  }
992 
993  av_free(cstr);
994  return 0;
995 }
996 
997 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
998 {
999  AVDictionary *new_params = NULL;
1000  const AVDictionaryEntry *e, *cookie_entry;
1001  char *eql, *name;
1002 
1003  // ensure the cookie is parsable
1004  if (parse_set_cookie(p, &new_params))
1005  return -1;
1006 
1007  // if there is no cookie value there is nothing to parse
1008  cookie_entry = av_dict_iterate(new_params, NULL);
1009  if (!cookie_entry || !cookie_entry->value) {
1010  av_dict_free(&new_params);
1011  return -1;
1012  }
1013 
1014  // ensure the cookie is not expired or older than an existing value
1015  if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
1016  struct tm new_tm = {0};
1017  if (!parse_http_date(e->value, &new_tm)) {
1018  AVDictionaryEntry *e2;
1019 
1020  // if the cookie has already expired ignore it
1021  if (av_timegm(&new_tm) < av_gettime() / 1000000) {
1022  av_dict_free(&new_params);
1023  return 0;
1024  }
1025 
1026  // only replace an older cookie with the same name
1027  e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
1028  if (e2 && e2->value) {
1029  AVDictionary *old_params = NULL;
1030  if (!parse_set_cookie(p, &old_params)) {
1031  e2 = av_dict_get(old_params, "expires", NULL, 0);
1032  if (e2 && e2->value) {
1033  struct tm old_tm = {0};
1034  if (!parse_http_date(e->value, &old_tm)) {
1035  if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
1036  av_dict_free(&new_params);
1037  av_dict_free(&old_params);
1038  return -1;
1039  }
1040  }
1041  }
1042  }
1043  av_dict_free(&old_params);
1044  }
1045  }
1046  }
1047  av_dict_free(&new_params);
1048 
1049  // duplicate the cookie name (dict will dupe the value)
1050  if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
1051  if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
1052 
1053  // add the cookie to the dictionary
1054  av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
1055 
1056  return 0;
1057 }
1058 
1059 static int cookie_string(AVDictionary *dict, char **cookies)
1060 {
1061  const AVDictionaryEntry *e = NULL;
1062  int len = 1;
1063 
1064  // determine how much memory is needed for the cookies string
1065  while ((e = av_dict_iterate(dict, e)))
1066  len += strlen(e->key) + strlen(e->value) + 1;
1067 
1068  // reallocate the cookies
1069  e = NULL;
1070  if (*cookies) av_free(*cookies);
1071  *cookies = av_malloc(len);
1072  if (!*cookies) return AVERROR(ENOMEM);
1073  *cookies[0] = '\0';
1074 
1075  // write out the cookies
1076  while ((e = av_dict_iterate(dict, e)))
1077  av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
1078 
1079  return 0;
1080 }
1081 
1082 static void parse_expires(HTTPContext *s, const char *p)
1083 {
1084  struct tm tm;
1085 
1086  if (!parse_http_date(p, &tm)) {
1087  s->expires = av_timegm(&tm);
1088  }
1089 }
1090 
1091 static void parse_cache_control(HTTPContext *s, const char *p)
1092 {
1093  char *age;
1094  int offset;
1095 
1096  /* give 'Expires' higher priority over 'Cache-Control' */
1097  if (s->expires) {
1098  return;
1099  }
1100 
1101  if (av_stristr(p, "no-cache") || av_stristr(p, "no-store")) {
1102  s->expires = -1;
1103  return;
1104  }
1105 
1106  age = av_stristr(p, "s-maxage=");
1107  offset = 9;
1108  if (!age) {
1109  age = av_stristr(p, "max-age=");
1110  offset = 8;
1111  }
1112 
1113  if (age) {
1114  s->expires = time(NULL) + atoi(p + offset);
1115  }
1116 }
1117 
1118 static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
1119 {
1120  HTTPContext *s = h->priv_data;
1121  const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
1122  char *tag, *p, *end, *method, *resource, *version;
1123  int ret;
1124 
1125  /* end of header */
1126  if (line[0] == '\0') {
1127  s->end_header = 1;
1128  return 0;
1129  }
1130 
1131  p = line;
1132  if (line_count == 0) {
1133  if (s->is_connected_server) {
1134  // HTTP method
1135  method = p;
1136  while (*p && !av_isspace(*p))
1137  p++;
1138  *(p++) = '\0';
1139  av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
1140  if (s->method) {
1141  if (av_strcasecmp(s->method, method)) {
1142  av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
1143  s->method, method);
1144  return ff_http_averror(400, AVERROR(EIO));
1145  }
1146  } else {
1147  // use autodetected HTTP method to expect
1148  av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1149  if (av_strcasecmp(auto_method, method)) {
1150  av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1151  "(%s autodetected %s received)\n", auto_method, method);
1152  return ff_http_averror(400, AVERROR(EIO));
1153  }
1154  if (!(s->method = av_strdup(method)))
1155  return AVERROR(ENOMEM);
1156  }
1157 
1158  // HTTP resource
1159  while (av_isspace(*p))
1160  p++;
1161  resource = p;
1162  while (*p && !av_isspace(*p))
1163  p++;
1164  *(p++) = '\0';
1165  av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1166  if (!(s->resource = av_strdup(resource)))
1167  return AVERROR(ENOMEM);
1168 
1169  // HTTP version
1170  while (av_isspace(*p))
1171  p++;
1172  version = p;
1173  while (*p && !av_isspace(*p))
1174  p++;
1175  *p = '\0';
1176  if (av_strncasecmp(version, "HTTP/", 5)) {
1177  av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1178  return ff_http_averror(400, AVERROR(EIO));
1179  }
1180  av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1181  } else {
1182  if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1183  s->willclose = 1;
1184  while (*p != '/' && *p != '\0')
1185  p++;
1186  while (*p == '/')
1187  p++;
1188  av_freep(&s->http_version);
1189  s->http_version = av_strndup(p, 3);
1190  while (!av_isspace(*p) && *p != '\0')
1191  p++;
1192  while (av_isspace(*p))
1193  p++;
1194  s->http_code = strtol(p, &end, 10);
1195 
1196  av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1197 
1198  *parsed_http_code = 1;
1199 
1200  if ((ret = check_http_code(h, s->http_code, end)) < 0)
1201  return ret;
1202  }
1203  } else {
1204  while (*p != '\0' && *p != ':')
1205  p++;
1206  if (*p != ':')
1207  return 1;
1208 
1209  *p = '\0';
1210  tag = line;
1211  p++;
1212  while (av_isspace(*p))
1213  p++;
1214  if (!av_strcasecmp(tag, "Location")) {
1215  if ((ret = parse_location(s, p)) < 0)
1216  return ret;
1217  } else if (!av_strcasecmp(tag, "Content-Length") &&
1218  s->filesize == UINT64_MAX) {
1219  s->filesize = strtoull(p, NULL, 10);
1220  } else if (!av_strcasecmp(tag, "Content-Range")) {
1221  parse_content_range(h, p);
1222  } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1223  !strncmp(p, "bytes", 5) &&
1224  s->seekable == -1) {
1225  h->is_streamed = 0;
1226  } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1227  !av_strncasecmp(p, "chunked", 7)) {
1228  s->filesize = UINT64_MAX;
1229  s->chunksize = 0;
1230  } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1231  ff_http_auth_handle_header(&s->auth_state, tag, p);
1232  } else if (!av_strcasecmp(tag, "Authentication-Info")) {
1233  ff_http_auth_handle_header(&s->auth_state, tag, p);
1234  } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1235  ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1236  } else if (!av_strcasecmp(tag, "Connection")) {
1237  if (!strcmp(p, "close"))
1238  s->willclose = 1;
1239  } else if (!av_strcasecmp(tag, "Server")) {
1240  if (!av_strcasecmp(p, "AkamaiGHost")) {
1241  s->is_akamai = 1;
1242  } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1243  s->is_mediagateway = 1;
1244  }
1245  } else if (!av_strcasecmp(tag, "Content-Type")) {
1246  av_free(s->mime_type);
1247  s->mime_type = av_get_token((const char **)&p, ";");
1248  } else if (!av_strcasecmp(tag, "Set-Cookie")) {
1249  if (parse_cookie(s, p, &s->cookie_dict))
1250  av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1251  } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1252  s->icy_metaint = strtoull(p, NULL, 10);
1253  } else if (!av_strncasecmp(tag, "Icy-", 4)) {
1254  if ((ret = parse_icy(s, tag, p)) < 0)
1255  return ret;
1256  } else if (!av_strcasecmp(tag, "Content-Encoding")) {
1257  if ((ret = parse_content_encoding(h, p)) < 0)
1258  return ret;
1259  } else if (!av_strcasecmp(tag, "Expires")) {
1260  parse_expires(s, p);
1261  } else if (!av_strcasecmp(tag, "Cache-Control")) {
1262  parse_cache_control(s, p);
1263  } else if (!av_strcasecmp(tag, "Retry-After")) {
1264  /* The header can be either an integer that represents seconds, or a date. */
1265  struct tm tm;
1266  int date_ret = parse_http_date(p, &tm);
1267  if (!date_ret) {
1268  time_t retry = av_timegm(&tm);
1269  int64_t now = av_gettime() / 1000000;
1270  int64_t diff = ((int64_t) retry) - now;
1271  s->retry_after = (unsigned int) FFMAX(0, diff);
1272  } else {
1273  s->retry_after = strtoul(p, NULL, 10);
1274  }
1275  }
1276  }
1277  return 1;
1278 }
1279 
1280 /**
1281  * Create a string containing cookie values for use as a HTTP cookie header
1282  * field value for a particular path and domain from the cookie values stored in
1283  * the HTTP protocol context. The cookie string is stored in *cookies, and may
1284  * be NULL if there are no valid cookies.
1285  *
1286  * @return a negative value if an error condition occurred, 0 otherwise
1287  */
1288 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1289  const char *domain)
1290 {
1291  // cookie strings will look like Set-Cookie header field values. Multiple
1292  // Set-Cookie fields will result in multiple values delimited by a newline
1293  int ret = 0;
1294  char *cookie, *set_cookies, *next;
1295  char *saveptr = NULL;
1296 
1297  // destroy any cookies in the dictionary.
1298  av_dict_free(&s->cookie_dict);
1299 
1300  if (!s->cookies)
1301  return 0;
1302 
1303  next = set_cookies = av_strdup(s->cookies);
1304  if (!next)
1305  return AVERROR(ENOMEM);
1306 
1307  *cookies = NULL;
1308  while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1309  AVDictionary *cookie_params = NULL;
1310  const AVDictionaryEntry *cookie_entry, *e;
1311 
1312  next = NULL;
1313  // store the cookie in a dict in case it is updated in the response
1314  if (parse_cookie(s, cookie, &s->cookie_dict))
1315  av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1316 
1317  // continue on to the next cookie if this one cannot be parsed
1318  if (parse_set_cookie(cookie, &cookie_params))
1319  goto skip_cookie;
1320 
1321  // if the cookie has no value, skip it
1322  cookie_entry = av_dict_iterate(cookie_params, NULL);
1323  if (!cookie_entry || !cookie_entry->value)
1324  goto skip_cookie;
1325 
1326  // if the cookie has expired, don't add it
1327  if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1328  struct tm tm_buf = {0};
1329  if (!parse_http_date(e->value, &tm_buf)) {
1330  if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1331  goto skip_cookie;
1332  }
1333  }
1334 
1335  // if no domain in the cookie assume it appied to this request
1336  if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1337  // find the offset comparison is on the min domain (b.com, not a.b.com)
1338  int domain_offset = strlen(domain) - strlen(e->value);
1339  if (domain_offset < 0)
1340  goto skip_cookie;
1341 
1342  // match the cookie domain
1343  if (av_strcasecmp(&domain[domain_offset], e->value))
1344  goto skip_cookie;
1345  }
1346 
1347  // if a cookie path is provided, ensure the request path is within that path
1348  e = av_dict_get(cookie_params, "path", NULL, 0);
1349  if (e && av_strncasecmp(path, e->value, strlen(e->value)))
1350  goto skip_cookie;
1351 
1352  // cookie parameters match, so copy the value
1353  if (!*cookies) {
1354  *cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1355  } else {
1356  char *tmp = *cookies;
1357  *cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1358  av_free(tmp);
1359  }
1360  if (!*cookies)
1361  ret = AVERROR(ENOMEM);
1362 
1363  skip_cookie:
1364  av_dict_free(&cookie_params);
1365  }
1366 
1367  av_free(set_cookies);
1368 
1369  return ret;
1370 }
1371 
1372 static inline int has_header(const char *str, const char *header)
1373 {
1374  /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1375  if (!str)
1376  return 0;
1377  return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1378 }
1379 
1380 static int http_read_header(URLContext *h)
1381 {
1382  HTTPContext *s = h->priv_data;
1383  char line[MAX_URL_SIZE];
1384  int err = 0, http_err = 0;
1385 
1386  av_freep(&s->new_location);
1387  s->expires = 0;
1388  s->chunksize = UINT64_MAX;
1389  s->filesize_from_content_range = UINT64_MAX;
1390 
1391  for (;;) {
1392  int parsed_http_code = 0;
1393 
1394  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1395  return err;
1396 
1397  av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1398 
1399  err = process_line(h, line, s->line_count, &parsed_http_code);
1400  if (err < 0) {
1401  if (parsed_http_code) {
1402  http_err = err;
1403  } else {
1404  /* Prefer to return HTTP code error if we've already seen one. */
1405  if (http_err)
1406  return http_err;
1407  else
1408  return err;
1409  }
1410  }
1411  if (err == 0)
1412  break;
1413  s->line_count++;
1414  }
1415  if (http_err)
1416  return http_err;
1417 
1418  // filesize from Content-Range can always be used, even if using chunked Transfer-Encoding
1419  if (s->filesize_from_content_range != UINT64_MAX)
1420  s->filesize = s->filesize_from_content_range;
1421 
1422  if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1423  h->is_streamed = 1; /* we can in fact _not_ seek */
1424 
1425  // add any new cookies into the existing cookie string
1426  cookie_string(s->cookie_dict, &s->cookies);
1427  av_dict_free(&s->cookie_dict);
1428 
1429  return err;
1430 }
1431 
1432 /**
1433  * Escape unsafe characters in path in order to pass them safely to the HTTP
1434  * request. Insipred by the algorithm in GNU wget:
1435  * - escape "%" characters not followed by two hex digits
1436  * - escape all "unsafe" characters except which are also "reserved"
1437  * - pass through everything else
1438  */
1439 static void bprint_escaped_path(AVBPrint *bp, const char *path)
1440 {
1441 #define NEEDS_ESCAPE(ch) \
1442  ((ch) <= ' ' || (ch) >= '\x7f' || \
1443  (ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1444  (ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1445  while (*path) {
1446  char buf[1024];
1447  char *q = buf;
1448  while (*path && q - buf < sizeof(buf) - 4) {
1449  if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1450  *q++ = *path++;
1451  *q++ = *path++;
1452  *q++ = *path++;
1453  } else if (NEEDS_ESCAPE(*path)) {
1454  q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1455  } else {
1456  *q++ = *path++;
1457  }
1458  }
1459  av_bprint_append_data(bp, buf, q - buf);
1460  }
1461 }
1462 
1463 static int http_connect(URLContext *h, const char *path, const char *local_path,
1464  const char *hoststr, const char *auth,
1465  const char *proxyauth)
1466 {
1467  HTTPContext *s = h->priv_data;
1468  int post, err;
1469  AVBPrint request;
1470  char *authstr = NULL, *proxyauthstr = NULL;
1471  uint64_t off = s->off;
1472  const char *method;
1473  int send_expect_100 = 0;
1474 
1475  av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1476 
1477  /* send http header */
1478  post = h->flags & AVIO_FLAG_WRITE;
1479 
1480  if (s->post_data) {
1481  /* force POST method and disable chunked encoding when
1482  * custom HTTP post data is set */
1483  post = 1;
1484  s->chunked_post = 0;
1485  }
1486 
1487  if (s->method)
1488  method = s->method;
1489  else
1490  method = post ? "POST" : "GET";
1491 
1492  authstr = ff_http_auth_create_response(&s->auth_state, auth,
1493  local_path, method);
1494  proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1495  local_path, method);
1496 
1497  if (post && !s->post_data) {
1498  if (s->send_expect_100 != -1) {
1499  send_expect_100 = s->send_expect_100;
1500  } else {
1501  send_expect_100 = 0;
1502  /* The user has supplied authentication but we don't know the auth type,
1503  * send Expect: 100-continue to get the 401 response including the
1504  * WWW-Authenticate header, or an 100 continue if no auth actually
1505  * is needed. */
1506  if (auth && *auth &&
1507  s->auth_state.auth_type == HTTP_AUTH_NONE &&
1508  s->http_code != 401)
1509  send_expect_100 = 1;
1510  }
1511  }
1512 
1513  av_bprintf(&request, "%s ", method);
1514  bprint_escaped_path(&request, path);
1515  av_bprintf(&request, " HTTP/1.1\r\n");
1516 
1517  if (post && s->chunked_post)
1518  av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1519  /* set default headers if needed */
1520  if (!has_header(s->headers, "\r\nUser-Agent: "))
1521  av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1522  if (s->referer) {
1523  /* set default headers if needed */
1524  if (!has_header(s->headers, "\r\nReferer: "))
1525  av_bprintf(&request, "Referer: %s\r\n", s->referer);
1526  }
1527  if (!has_header(s->headers, "\r\nAccept: "))
1528  av_bprintf(&request, "Accept: */*\r\n");
1529  // Note: we send the Range header on purpose, even when we're probing,
1530  // since it allows us to detect more reliably if a (non-conforming)
1531  // server supports seeking by analysing the reply headers.
1532  if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable != 0)) {
1533  av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1534  if (s->end_off)
1535  av_bprintf(&request, "%"PRId64, s->end_off - 1);
1536  av_bprintf(&request, "\r\n");
1537  }
1538  if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1539  av_bprintf(&request, "Expect: 100-continue\r\n");
1540 
1541  if (!has_header(s->headers, "\r\nConnection: "))
1542  av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1543 
1544  if (!has_header(s->headers, "\r\nHost: "))
1545  av_bprintf(&request, "Host: %s\r\n", hoststr);
1546  if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1547  av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1548 
1549  if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1550  av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1551  if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1552  char *cookies = NULL;
1553  if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1554  av_bprintf(&request, "Cookie: %s\r\n", cookies);
1555  av_free(cookies);
1556  }
1557  }
1558  if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1559  av_bprintf(&request, "Icy-MetaData: 1\r\n");
1560 
1561  /* now add in custom headers */
1562  if (s->headers)
1563  av_bprintf(&request, "%s", s->headers);
1564 
1565  if (authstr)
1566  av_bprintf(&request, "%s", authstr);
1567  if (proxyauthstr)
1568  av_bprintf(&request, "Proxy-%s", proxyauthstr);
1569  av_bprintf(&request, "\r\n");
1570 
1571  av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1572 
1573  if (!av_bprint_is_complete(&request)) {
1574  av_log(h, AV_LOG_ERROR, "overlong headers\n");
1575  err = AVERROR(EINVAL);
1576  goto done;
1577  }
1578 
1579  if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1580  goto done;
1581 
1582  if (s->post_data)
1583  if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1584  goto done;
1585 
1586  /* init input buffer */
1587  s->buf_ptr = s->buffer;
1588  s->buf_end = s->buffer;
1589  s->line_count = 0;
1590  s->off = 0;
1591  s->icy_data_read = 0;
1592  s->filesize = UINT64_MAX;
1593  s->willclose = 0;
1594  s->end_chunked_post = 0;
1595  s->end_header = 0;
1596 #if CONFIG_ZLIB
1597  s->compressed = 0;
1598 #endif
1599  if (post && !s->post_data && !send_expect_100) {
1600  /* Pretend that it did work. We didn't read any header yet, since
1601  * we've still to send the POST data, but the code calling this
1602  * function will check http_code after we return. */
1603  s->http_code = 200;
1604  err = 0;
1605  goto done;
1606  }
1607 
1608  /* wait for header */
1609  err = http_read_header(h);
1610  if (err < 0)
1611  goto done;
1612 
1613  if (s->new_location)
1614  s->off = off;
1615 
1616  err = (off == s->off) ? 0 : -1;
1617 done:
1618  av_freep(&authstr);
1619  av_freep(&proxyauthstr);
1620  return err;
1621 }
1622 
1623 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1624 {
1625  HTTPContext *s = h->priv_data;
1626  int len;
1627 
1628  if (s->chunksize != UINT64_MAX) {
1629  if (s->chunkend) {
1630  return AVERROR_EOF;
1631  }
1632  if (!s->chunksize) {
1633  char line[32];
1634  int err;
1635 
1636  do {
1637  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1638  return err;
1639  } while (!*line); /* skip CR LF from last chunk */
1640 
1641  s->chunksize = strtoull(line, NULL, 16);
1642 
1643  av_log(h, AV_LOG_TRACE,
1644  "Chunked encoding data size: %"PRIu64"\n",
1645  s->chunksize);
1646 
1647  if (!s->chunksize && s->multiple_requests) {
1648  http_get_line(s, line, sizeof(line)); // read empty chunk
1649  s->chunkend = 1;
1650  return 0;
1651  }
1652  else if (!s->chunksize) {
1653  av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1654  ffurl_closep(&s->hd);
1655  return 0;
1656  }
1657  else if (s->chunksize == UINT64_MAX) {
1658  av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1659  s->chunksize);
1660  return AVERROR(EINVAL);
1661  }
1662  }
1663  size = FFMIN(size, s->chunksize);
1664  }
1665 
1666  /* read bytes from input buffer first */
1667  len = s->buf_end - s->buf_ptr;
1668  if (len > 0) {
1669  if (len > size)
1670  len = size;
1671  memcpy(buf, s->buf_ptr, len);
1672  s->buf_ptr += len;
1673  } else {
1674  uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1675  if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1676  return AVERROR_EOF;
1677  len = ffurl_read(s->hd, buf, size);
1678  if ((!len || len == AVERROR_EOF) &&
1679  (!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1680  av_log(h, AV_LOG_ERROR,
1681  "Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1682  s->off, target_end
1683  );
1684  return AVERROR(EIO);
1685  }
1686  }
1687  if (len > 0) {
1688  s->off += len;
1689  if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1690  av_assert0(s->chunksize >= len);
1691  s->chunksize -= len;
1692  }
1693  }
1694  return len;
1695 }
1696 
1697 #if CONFIG_ZLIB
1698 #define DECOMPRESS_BUF_SIZE (256 * 1024)
1699 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1700 {
1701  HTTPContext *s = h->priv_data;
1702  int ret;
1703 
1704  if (!s->inflate_buffer) {
1705  s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1706  if (!s->inflate_buffer)
1707  return AVERROR(ENOMEM);
1708  }
1709 
1710  if (s->inflate_stream.avail_in == 0) {
1711  int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1712  if (read <= 0)
1713  return read;
1714  s->inflate_stream.next_in = s->inflate_buffer;
1715  s->inflate_stream.avail_in = read;
1716  }
1717 
1718  s->inflate_stream.avail_out = size;
1719  s->inflate_stream.next_out = buf;
1720 
1721  ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1722  if (ret != Z_OK && ret != Z_STREAM_END)
1723  av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1724  ret, s->inflate_stream.msg);
1725 
1726  return size - s->inflate_stream.avail_out;
1727 }
1728 #endif /* CONFIG_ZLIB */
1729 
1730 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1731 
1732 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1733 {
1734  HTTPContext *s = h->priv_data;
1735  int err, read_ret;
1736  int64_t seek_ret;
1737  int reconnect_delay = 0;
1738  int reconnect_delay_total = 0;
1739  int conn_attempts = 1;
1740 
1741  if (!s->hd)
1742  return AVERROR_EOF;
1743 
1744  if (s->end_chunked_post && !s->end_header) {
1745  err = http_read_header(h);
1746  if (err < 0)
1747  return err;
1748  }
1749 
1750 #if CONFIG_ZLIB
1751  if (s->compressed)
1752  return http_buf_read_compressed(h, buf, size);
1753 #endif /* CONFIG_ZLIB */
1754  read_ret = http_buf_read(h, buf, size);
1755  while (read_ret < 0) {
1756  uint64_t target = h->is_streamed ? 0 : s->off;
1757  bool is_premature = s->filesize > 0 && s->off < s->filesize;
1758 
1759  if (read_ret == AVERROR_EXIT)
1760  break;
1761 
1762  if (h->is_streamed && !s->reconnect_streamed)
1763  break;
1764 
1765  if (!(s->reconnect && is_premature) &&
1766  !(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
1767  if (is_premature)
1768  return AVERROR(EIO);
1769  else
1770  break;
1771  }
1772 
1773  if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
1774  reconnect_delay_total > s->reconnect_delay_total_max)
1775  return AVERROR(EIO);
1776 
1777  av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s), error=%s.\n", s->off, reconnect_delay, av_err2str(read_ret));
1778  err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1779  if (err != AVERROR(ETIMEDOUT))
1780  return err;
1781  reconnect_delay_total += reconnect_delay;
1782  reconnect_delay = 1 + 2*reconnect_delay;
1783  conn_attempts++;
1784  seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1785  if (seek_ret >= 0 && seek_ret != target) {
1786  av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1787  return read_ret;
1788  }
1789 
1790  read_ret = http_buf_read(h, buf, size);
1791  }
1792 
1793  return read_ret;
1794 }
1795 
1796 // Like http_read_stream(), but no short reads.
1797 // Assumes partial reads are an error.
1798 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1799 {
1800  int pos = 0;
1801  while (pos < size) {
1802  int len = http_read_stream(h, buf + pos, size - pos);
1803  if (len < 0)
1804  return len;
1805  pos += len;
1806  }
1807  return pos;
1808 }
1809 
1810 static void update_metadata(URLContext *h, char *data)
1811 {
1812  char *key;
1813  char *val;
1814  char *end;
1815  char *next = data;
1816  HTTPContext *s = h->priv_data;
1817 
1818  while (*next) {
1819  key = next;
1820  val = strstr(key, "='");
1821  if (!val)
1822  break;
1823  end = strstr(val, "';");
1824  if (!end)
1825  break;
1826 
1827  *val = '\0';
1828  *end = '\0';
1829  val += 2;
1830 
1831  av_dict_set(&s->metadata, key, val, 0);
1832  av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1833 
1834  next = end + 2;
1835  }
1836 }
1837 
1838 static int store_icy(URLContext *h, int size)
1839 {
1840  HTTPContext *s = h->priv_data;
1841  /* until next metadata packet */
1842  uint64_t remaining;
1843 
1844  if (s->icy_metaint < s->icy_data_read)
1845  return AVERROR_INVALIDDATA;
1846  remaining = s->icy_metaint - s->icy_data_read;
1847 
1848  if (!remaining) {
1849  /* The metadata packet is variable sized. It has a 1 byte header
1850  * which sets the length of the packet (divided by 16). If it's 0,
1851  * the metadata doesn't change. After the packet, icy_metaint bytes
1852  * of normal data follows. */
1853  uint8_t ch;
1854  int len = http_read_stream_all(h, &ch, 1);
1855  if (len < 0)
1856  return len;
1857  if (ch > 0) {
1858  char data[255 * 16 + 1];
1859  int ret;
1860  len = ch * 16;
1861  ret = http_read_stream_all(h, data, len);
1862  if (ret < 0)
1863  return ret;
1864  data[len + 1] = 0;
1865  if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1866  return ret;
1867  update_metadata(h, data);
1868  }
1869  s->icy_data_read = 0;
1870  remaining = s->icy_metaint;
1871  }
1872 
1873  return FFMIN(size, remaining);
1874 }
1875 
1876 static int http_read(URLContext *h, uint8_t *buf, int size)
1877 {
1878  HTTPContext *s = h->priv_data;
1879 
1880  if (s->icy_metaint > 0) {
1881  size = store_icy(h, size);
1882  if (size < 0)
1883  return size;
1884  }
1885 
1886  size = http_read_stream(h, buf, size);
1887  if (size > 0)
1888  s->icy_data_read += size;
1889  return size;
1890 }
1891 
1892 /* used only when posting data */
1893 static int http_write(URLContext *h, const uint8_t *buf, int size)
1894 {
1895  char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1896  int ret;
1897  char crlf[] = "\r\n";
1898  HTTPContext *s = h->priv_data;
1899 
1900  if (!s->chunked_post) {
1901  /* non-chunked data is sent without any special encoding */
1902  return ffurl_write(s->hd, buf, size);
1903  }
1904 
1905  /* silently ignore zero-size data since chunk encoding that would
1906  * signal EOF */
1907  if (size > 0) {
1908  /* upload data using chunked encoding */
1909  snprintf(temp, sizeof(temp), "%x\r\n", size);
1910 
1911  if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1912  (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1913  (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1914  return ret;
1915  }
1916  return size;
1917 }
1918 
1919 static int http_shutdown(URLContext *h, int flags)
1920 {
1921  int ret = 0;
1922  char footer[] = "0\r\n\r\n";
1923  HTTPContext *s = h->priv_data;
1924 
1925  /* signal end of chunked encoding if used */
1926  if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1927  ((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1928  ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1929  ret = ret > 0 ? 0 : ret;
1930  /* flush the receive buffer when it is write only mode */
1931  if (!(flags & AVIO_FLAG_READ)) {
1932  char buf[1024];
1933  int read_ret;
1934  s->hd->flags |= AVIO_FLAG_NONBLOCK;
1935  read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1936  s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1937  if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1938  av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1939  ret = read_ret;
1940  }
1941  }
1942  s->end_chunked_post = 1;
1943  }
1944 
1945  return ret;
1946 }
1947 
1948 static int http_close(URLContext *h)
1949 {
1950  int ret = 0;
1951  HTTPContext *s = h->priv_data;
1952 
1953 #if CONFIG_ZLIB
1954  inflateEnd(&s->inflate_stream);
1955  av_freep(&s->inflate_buffer);
1956 #endif /* CONFIG_ZLIB */
1957 
1958  if (s->hd && !s->end_chunked_post)
1959  /* Close the write direction by sending the end of chunked encoding. */
1960  ret = http_shutdown(h, h->flags);
1961 
1962  if (s->hd)
1963  ffurl_closep(&s->hd);
1964  av_dict_free(&s->chained_options);
1965  av_dict_free(&s->cookie_dict);
1966  av_dict_free(&s->redirect_cache);
1967  av_freep(&s->new_location);
1968  av_freep(&s->uri);
1969  return ret;
1970 }
1971 
1972 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1973 {
1974  HTTPContext *s = h->priv_data;
1975  URLContext *old_hd = s->hd;
1976  uint64_t old_off = s->off;
1977  uint8_t old_buf[BUFFER_SIZE];
1978  int old_buf_size, ret;
1979  AVDictionary *options = NULL;
1980 
1981  if (whence == AVSEEK_SIZE)
1982  return s->filesize;
1983  else if (!force_reconnect &&
1984  ((whence == SEEK_CUR && off == 0) ||
1985  (whence == SEEK_SET && off == s->off)))
1986  return s->off;
1987  else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1988  return AVERROR(ENOSYS);
1989 
1990  if (whence == SEEK_CUR)
1991  off += s->off;
1992  else if (whence == SEEK_END)
1993  off += s->filesize;
1994  else if (whence != SEEK_SET)
1995  return AVERROR(EINVAL);
1996  if (off < 0)
1997  return AVERROR(EINVAL);
1998  s->off = off;
1999 
2000  if (s->off && h->is_streamed)
2001  return AVERROR(ENOSYS);
2002 
2003  /* do not try to make a new connection if seeking past the end of the file */
2004  if (s->end_off || s->filesize != UINT64_MAX) {
2005  uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
2006  if (s->off >= end_pos)
2007  return s->off;
2008  }
2009 
2010  /* if the location changed (redirect), revert to the original uri */
2011  if (strcmp(s->uri, s->location)) {
2012  char *new_uri;
2013  new_uri = av_strdup(s->uri);
2014  if (!new_uri)
2015  return AVERROR(ENOMEM);
2016  av_free(s->location);
2017  s->location = new_uri;
2018  }
2019 
2020  /* we save the old context in case the seek fails */
2021  old_buf_size = s->buf_end - s->buf_ptr;
2022  memcpy(old_buf, s->buf_ptr, old_buf_size);
2023  s->hd = NULL;
2024 
2025  /* if it fails, continue on old connection */
2026  if ((ret = http_open_cnx(h, &options)) < 0) {
2027  av_dict_free(&options);
2028  memcpy(s->buffer, old_buf, old_buf_size);
2029  s->buf_ptr = s->buffer;
2030  s->buf_end = s->buffer + old_buf_size;
2031  s->hd = old_hd;
2032  s->off = old_off;
2033  return ret;
2034  }
2035  av_dict_free(&options);
2036  ffurl_close(old_hd);
2037  return off;
2038 }
2039 
2040 static int64_t http_seek(URLContext *h, int64_t off, int whence)
2041 {
2042  return http_seek_internal(h, off, whence, 0);
2043 }
2044 
2045 static int http_get_file_handle(URLContext *h)
2046 {
2047  HTTPContext *s = h->priv_data;
2048  return ffurl_get_file_handle(s->hd);
2049 }
2050 
2051 static int http_get_short_seek(URLContext *h)
2052 {
2053  HTTPContext *s = h->priv_data;
2054  if (s->short_seek_size >= 1)
2055  return s->short_seek_size;
2056  return ffurl_get_short_seek(s->hd);
2057 }
2058 
2059 #define HTTP_CLASS(flavor) \
2060 static const AVClass flavor ## _context_class = { \
2061  .class_name = # flavor, \
2062  .item_name = av_default_item_name, \
2063  .option = options, \
2064  .version = LIBAVUTIL_VERSION_INT, \
2065 }
2066 
2067 #if CONFIG_HTTP_PROTOCOL
2068 HTTP_CLASS(http);
2069 
2070 const URLProtocol ff_http_protocol = {
2071  .name = "http",
2072  .url_open2 = http_open,
2073  .url_accept = http_accept,
2074  .url_handshake = http_handshake,
2075  .url_read = http_read,
2076  .url_write = http_write,
2077  .url_seek = http_seek,
2078  .url_close = http_close,
2079  .url_get_file_handle = http_get_file_handle,
2080  .url_get_short_seek = http_get_short_seek,
2081  .url_shutdown = http_shutdown,
2082  .priv_data_size = sizeof(HTTPContext),
2083  .priv_data_class = &http_context_class,
2084  .flags = URL_PROTOCOL_FLAG_NETWORK,
2085  .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
2086 };
2087 #endif /* CONFIG_HTTP_PROTOCOL */
2088 
2089 #if CONFIG_HTTPS_PROTOCOL
2090 HTTP_CLASS(https);
2091 
2092 const URLProtocol ff_https_protocol = {
2093  .name = "https",
2094  .url_open2 = http_open,
2095  .url_read = http_read,
2096  .url_write = http_write,
2097  .url_seek = http_seek,
2098  .url_close = http_close,
2099  .url_get_file_handle = http_get_file_handle,
2100  .url_get_short_seek = http_get_short_seek,
2101  .url_shutdown = http_shutdown,
2102  .priv_data_size = sizeof(HTTPContext),
2103  .priv_data_class = &https_context_class,
2104  .flags = URL_PROTOCOL_FLAG_NETWORK,
2105  .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
2106 };
2107 #endif /* CONFIG_HTTPS_PROTOCOL */
2108 
2109 #if CONFIG_HTTPPROXY_PROTOCOL
2110 static int http_proxy_close(URLContext *h)
2111 {
2112  HTTPContext *s = h->priv_data;
2113  if (s->hd)
2114  ffurl_closep(&s->hd);
2115  return 0;
2116 }
2117 
2118 static int http_proxy_open(URLContext *h, const char *uri, int flags)
2119 {
2120  HTTPContext *s = h->priv_data;
2121  char hostname[1024], hoststr[1024];
2122  char auth[1024], pathbuf[1024], *path;
2123  char lower_url[100];
2124  int port, ret = 0, auth_attempts = 0;
2125  HTTPAuthType cur_auth_type;
2126  char *authstr;
2127 
2128  if( s->seekable == 1 )
2129  h->is_streamed = 0;
2130  else
2131  h->is_streamed = 1;
2132 
2133  av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
2134  pathbuf, sizeof(pathbuf), uri);
2135  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
2136  path = pathbuf;
2137  if (*path == '/')
2138  path++;
2139 
2140  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
2141  NULL);
2142 redo:
2143  ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
2144  &h->interrupt_callback, NULL,
2145  h->protocol_whitelist, h->protocol_blacklist, h);
2146  if (ret < 0)
2147  return ret;
2148 
2149  authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
2150  path, "CONNECT");
2151  snprintf(s->buffer, sizeof(s->buffer),
2152  "CONNECT %s HTTP/1.1\r\n"
2153  "Host: %s\r\n"
2154  "Connection: close\r\n"
2155  "%s%s"
2156  "\r\n",
2157  path,
2158  hoststr,
2159  authstr ? "Proxy-" : "", authstr ? authstr : "");
2160  av_freep(&authstr);
2161 
2162  if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
2163  goto fail;
2164 
2165  s->buf_ptr = s->buffer;
2166  s->buf_end = s->buffer;
2167  s->line_count = 0;
2168  s->filesize = UINT64_MAX;
2169  cur_auth_type = s->proxy_auth_state.auth_type;
2170 
2171  /* Note: This uses buffering, potentially reading more than the
2172  * HTTP header. If tunneling a protocol where the server starts
2173  * the conversation, we might buffer part of that here, too.
2174  * Reading that requires using the proper ffurl_read() function
2175  * on this URLContext, not using the fd directly (as the tls
2176  * protocol does). This shouldn't be an issue for tls though,
2177  * since the client starts the conversation there, so there
2178  * is no extra data that we might buffer up here.
2179  */
2180  ret = http_read_header(h);
2181  if (ret < 0)
2182  goto fail;
2183 
2184  auth_attempts++;
2185  if (s->http_code == 407 &&
2186  (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
2187  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 2) {
2188  ffurl_closep(&s->hd);
2189  goto redo;
2190  }
2191 
2192  if (s->http_code < 400)
2193  return 0;
2194  ret = ff_http_averror(s->http_code, AVERROR(EIO));
2195 
2196 fail:
2197  http_proxy_close(h);
2198  return ret;
2199 }
2200 
2201 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
2202 {
2203  HTTPContext *s = h->priv_data;
2204  return ffurl_write(s->hd, buf, size);
2205 }
2206 
2207 const URLProtocol ff_httpproxy_protocol = {
2208  .name = "httpproxy",
2209  .url_open = http_proxy_open,
2210  .url_read = http_buf_read,
2211  .url_write = http_proxy_write,
2212  .url_close = http_proxy_close,
2213  .url_get_file_handle = http_get_file_handle,
2214  .priv_data_size = sizeof(HTTPContext),
2215  .flags = URL_PROTOCOL_FLAG_NETWORK,
2216 };
2217 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
redirect_cache_get
static char * redirect_cache_get(HTTPContext *s)
Definition: http.c:323
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:32
flags
const SwsFlags flags[]
Definition: swscale.c:61
HTTP_AUTH_BASIC
@ HTTP_AUTH_BASIC
HTTP 1.0 Basic auth from RFC 1945 (also in RFC 2617)
Definition: httpauth.h:30
av_isxdigit
static av_const int av_isxdigit(int c)
Locale-independent conversion of ASCII isxdigit.
Definition: avstring.h:247
HTTPContext::http_code
int http_code
Definition: http.c:76
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:216
http_open_cnx
static int http_open_cnx(URLContext *h, AVDictionary **options)
Definition: http.c:365
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
WHITESPACES
#define WHITESPACES
Definition: http.c:63
av_bprint_is_complete
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:218
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
http_write_reply
static int http_write_reply(URLContext *h, int status_code)
Definition: http.c:565
URL_PROTOCOL_FLAG_NETWORK
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:33
AVERROR_HTTP_OTHER_4XX
#define AVERROR_HTTP_OTHER_4XX
Definition: error.h:83
parse_icy
static int parse_icy(HTTPContext *s, const char *tag, const char *p)
Definition: http.c:913
message
Definition: api-threadmessage-test.c:47
HTTPContext::http_proxy
char * http_proxy
Definition: http.c:85
av_stristr
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:58
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVIO_FLAG_READ_WRITE
#define AVIO_FLAG_READ_WRITE
read-write pseudo flag
Definition: avio.h:619
av_dict_count
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:37
bprint_escaped_path
static void bprint_escaped_path(AVBPrint *bp, const char *path)
Escape unsafe characters in path in order to pass them safely to the HTTP request.
Definition: http.c:1439
http_listen
static int http_listen(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:686
int64_t
long long int64_t
Definition: coverity.c:34
metadata
Stream codec metadata
Definition: ogg-flac-chained-meta.txt:2
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:115
ffurl_write
static int ffurl_write(URLContext *h, const uint8_t *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: url.h:202
HTTPContext::seekable
int seekable
Control seekability, 0 = disable, 1 = enable, -1 = probe.
Definition: http.c:95
av_strcasecmp
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:207
av_isspace
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:218
http_read
static int http_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1876
http_seek_internal
static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
Definition: http.c:1972
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static void parse_cache_control(HTTPContext *s, const char *p)
Definition: http.c:1091
HTTPContext::new_location
char * new_location
Definition: http.c:141
READ_HEADERS
@ READ_HEADERS
Definition: http.c:66
AVOption
AVOption.
Definition: opt.h:429
AVERROR_HTTP_SERVER_ERROR
#define AVERROR_HTTP_SERVER_ERROR
Definition: error.h:84
AVSEEK_SIZE
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:468
data
const char data[16]
Definition: mxf.c:149
WRITE_REPLY_HEADERS
@ WRITE_REPLY_HEADERS
Definition: http.c:67
NEEDS_ESCAPE
#define NEEDS_ESCAPE(ch)
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:226
freeenv_utf8
static void freeenv_utf8(char *var)
Definition: getenv_utf8.h:72
http_get_line
static int http_get_line(HTTPContext *s, char *line, int line_size)
Definition: http.c:812
ffurl_close
int ffurl_close(URLContext *h)
Definition: avio.c:611
AVDictionary
Definition: dict.c:32
HTTPContext::end_header
int end_header
Definition: http.c:100
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
HTTPContext::chained_options
AVDictionary * chained_options
Definition: http.c:123
parse_location
static int parse_location(HTTPContext *s, const char *p)
Definition: http.c:851
http_read_stream
static int http_read_stream(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1732
ff_http_auth_create_response
char * ff_http_auth_create_response(HTTPAuthState *state, const char *auth, const char *path, const char *method)
Definition: httpauth.c:240
HTTPContext::chunkend
int chunkend
Definition: http.c:79
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:103
URLProtocol
Definition: url.h:51
MAX_DATE_LEN
#define MAX_DATE_LEN
Definition: http.c:62
os_support.h
HTTPContext::hd
URLContext * hd
Definition: http.c:73
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
HTTPContext::buf_ptr
unsigned char * buf_ptr
Definition: http.c:74
ff_httpproxy_protocol
const URLProtocol ff_httpproxy_protocol
AVERROR_HTTP_UNAUTHORIZED
#define AVERROR_HTTP_UNAUTHORIZED
Definition: error.h:79
HTTPContext::referer
char * referer
Definition: http.c:90
get_cookies
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:1288
HTTPContext::http_version
char * http_version
Definition: http.c:88
AV_OPT_TYPE_BINARY
@ AV_OPT_TYPE_BINARY
Underlying C type is a uint8_t* that is either NULL or points to an array allocated with the av_mallo...
Definition: opt.h:286
av_bprint_init_for_buffer
void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size)
Init a print buffer using a pre-existing buffer.
Definition: bprint.c:85
macros.h
fail
#define fail()
Definition: checkasm.h:195
ffurl_get_short_seek
int ffurl_get_short_seek(void *urlcontext)
Return the current short seek threshold value for this URL.
Definition: avio.c:838
check_http_code
static int check_http_code(URLContext *h, int http_code, const char *end)
Definition: http.c:836
HTTPContext::headers
char * headers
Definition: http.c:86
DEFAULT_USER_AGENT
#define DEFAULT_USER_AGENT
Definition: http.c:153
inflate
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
Definition: vf_neighbor.c:194
cookie_string
static int cookie_string(AVDictionary *dict, char **cookies)
Definition: http.c:1059
has_header
static int has_header(const char *str, const char *header)
Definition: http.c:1372
redirect_cache_set
static int redirect_cache_set(HTTPContext *s, const char *source, const char *dest, int64_t expiry)
Definition: http.c:347
val
static double val(void *priv, double ch)
Definition: aeval.c:77
av_timegm
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
Definition: parseutils.c:573
av_opt_set
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:835
SPACE_CHARS
#define SPACE_CHARS
Definition: dnn_backend_tf.c:356
URLContext::priv_data
void * priv_data
Definition: url.h:38
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:79
MAX_REDIRECTS
#define MAX_REDIRECTS
Definition: http.c:58
avassert.h
HTTPContext::listen
int listen
Definition: http.c:133
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:236
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
AVERROR_HTTP_NOT_FOUND
#define AVERROR_HTTP_NOT_FOUND
Definition: error.h:81
HTTPContext::is_connected_server
int is_connected_server
Definition: http.c:138
E
#define E
Definition: http.c:152
av_dict_get
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:60
ffurl_open_whitelist
int ffurl_open_whitelist(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist, const char *blacklist, URLContext *parent)
Create an URLContext for accessing to the resource indicated by url, and open it.
Definition: avio.c:362
s
#define s(width, name)
Definition: cbs_vp9.c:198
HTTPContext::buf_end
unsigned char * buf_end
Definition: http.c:74
HTTPContext::cookies
char * cookies
holds newline ( ) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
Definition: http.c:107
AVDictionaryEntry::key
char * key
Definition: dict.h:91
BUFFER_SIZE
#define BUFFER_SIZE
Definition: http.c:57
av_strtok
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:178
ff_url_join
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:40
AV_OPT_TYPE_INT64
@ AV_OPT_TYPE_INT64
Underlying C type is int64_t.
Definition: opt.h:263
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:618
HTTPContext::off
uint64_t off
Definition: http.c:80
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:231
HTTPContext::post_datalen
int post_datalen
Definition: http.c:104
HTTPContext::reconnect_on_network_error
int reconnect_on_network_error
Definition: http.c:129
av_stristart
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:47
key
const char * key
Definition: hwcontext_opencl.c:189
D
#define D
Definition: http.c:151
HTTPContext::respect_retry_after
int respect_retry_after
Definition: http.c:144
parse_cookie
static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
Definition: http.c:997
HTTPContext::end_chunked_post
int end_chunked_post
Definition: http.c:98
ff_http_match_no_proxy
int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
Definition: network.c:557
ff_http_auth_handle_header
void ff_http_auth_handle_header(HTTPAuthState *state, const char *key, const char *value)
Definition: httpauth.c:90
parse_content_encoding
static int parse_content_encoding(URLContext *h, const char *p)
Definition: http.c:879
handle_http_errors
static void handle_http_errors(URLContext *h, int error)
Definition: http.c:644
HTTPContext::buffer
unsigned char buffer[BUFFER_SIZE]
Definition: http.c:74
ff_http_do_new_request
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:478
ffurl_accept
int ffurl_accept(URLContext *s, URLContext **c)
Accept an URLContext c on an URLContext s.
Definition: avio.c:265
internal.h
opts
AVDictionary * opts
Definition: movenc.c:51
http_read_stream_all
static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1798
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:76
NULL
#define NULL
Definition: coverity.c:32
http_get_short_seek
static int http_get_short_seek(URLContext *h)
Definition: http.c:2051
av_match_list
int av_match_list(const char *name, const char *list, char separator)
Check if a name is in a list.
Definition: avstring.c:444
https
FFmpeg hosted at Telepoint in bulgaria ns2 avcodec org Replica Name hosted at Prometeus Cdlan in italy instead several VMs run on it ffmpeg org and public facing also website git fftrac this part is build by a cronjob So is the doxygen stuff as well as the FFmpeg git snapshot These scripts are under the ffcron user https
Definition: infra.txt:80
tmp
static uint8_t tmp[20]
Definition: aes_ctr.c:47
HTTPContext::multiple_requests
int multiple_requests
Definition: http.c:102
ff_http_init_auth_state
void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
Initialize the authentication state based on another HTTP URLContext.
Definition: http.c:202
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Underlying C type is AVDictionary*.
Definition: opt.h:290
HTTPContext::metadata
AVDictionary * metadata
Definition: http.c:117
parseutils.h
ff_http_do_new_request2
int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
Send a new HTTP request, reusing the old connection.
Definition: http.c:482
HTTPContext::proxy_auth_state
HTTPAuthState proxy_auth_state
Definition: http.c:84
getenv_utf8
static char * getenv_utf8(const char *varname)
Definition: getenv_utf8.h:67
AVERROR_HTTP_TOO_MANY_REQUESTS
#define AVERROR_HTTP_TOO_MANY_REQUESTS
Definition: error.h:82
options
Definition: swscale.c:43
http_buf_read
static int http_buf_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1623
http_shutdown
static int http_shutdown(URLContext *h, int flags)
Definition: http.c:1919
process_line
static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
Definition: http.c:1118
HTTPContext::filesize
uint64_t filesize
Definition: http.c:80
time.h
parse_content_range
static void parse_content_range(URLContext *h, const char *p)
Definition: http.c:864
AVERROR_HTTP_BAD_REQUEST
#define AVERROR_HTTP_BAD_REQUEST
Definition: error.h:78
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
HTTPContext::line_count
int line_count
Definition: http.c:75
HTTPAuthState
HTTP Authentication state structure.
Definition: httpauth.h:55
source
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a source
Definition: filter_design.txt:255
http
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i http
Definition: writing_filters.txt:29
ff_http_averror
int ff_http_averror(int status_code, int default_averror)
Definition: http.c:547
av_strncasecmp
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:217
HTTPContext::filesize_from_content_range
uint64_t filesize_from_content_range
Definition: http.c:143
HTTPContext::reconnect_max_retries
int reconnect_max_retries
Definition: http.c:146
HTTPContext::reconnect_streamed
int reconnect_streamed
Definition: http.c:130
parse_http_date
static int parse_http_date(const char *date_str, struct tm *buf)
Definition: http.c:935
HTTPContext::method
char * method
Definition: http.c:126
HTTPContext::uri
char * uri
Definition: http.c:81
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:122
parse_expires
static void parse_expires(HTTPContext *s, const char *p)
Definition: http.c:1082
size
int size
Definition: twinvq_data.h:10344
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:188
HTTPContext::reconnect_delay_total_max
int reconnect_delay_total_max
Definition: http.c:147
URLProtocol::name
const char * name
Definition: url.h:52
http_write
static int http_write(URLContext *h, const uint8_t *buf, int size)
Definition: http.c:1893
HTTPContext::icy_data_read
uint64_t icy_data_read
Definition: http.c:112
header
static const uint8_t header[24]
Definition: sdr2.c:68
diff
static av_always_inline int diff(const struct color_info *a, const struct color_info *b, const int trans_thresh)
Definition: vf_paletteuse.c:166
HTTPContext
Definition: http.c:71
getenv_utf8.h
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
line
Definition: graph2dot.c:48
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:233
av_strstart
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:36
HTTPContext::icy_metadata_packet
char * icy_metadata_packet
Definition: http.c:116
version
version
Definition: libkvazaar.c:315
ff_http_protocol
const URLProtocol ff_http_protocol
HTTPContext::icy
int icy
Definition: http.c:110
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:221
update_metadata
static void update_metadata(URLContext *h, char *data)
Definition: http.c:1810
AV_OPT_FLAG_READONLY
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:368
ffurl_alloc
int ffurl_alloc(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb)
Create a URLContext for accessing to the resource indicated by url, but do not initiate the connectio...
Definition: avio.c:349
HTTPContext::is_mediagateway
int is_mediagateway
Definition: http.c:106
HTTPContext::reconnect_at_eof
int reconnect_at_eof
Definition: http.c:128
httpauth.h
http_should_reconnect
static int http_should_reconnect(HTTPContext *s, int err)
Definition: http.c:289
bprint.h
http_handshake
static int http_handshake(URLContext *c)
Definition: http.c:650
HTTP_AUTH_NONE
@ HTTP_AUTH_NONE
No authentication specified.
Definition: httpauth.h:29
URLContext
Definition: url.h:35
http_open
static int http_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:718
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
http_connect
static int http_connect(URLContext *h, const char *path, const char *local_path, const char *hoststr, const char *auth, const char *proxyauth)
Definition: http.c:1463
ff_network_sleep_interruptible
int ff_network_sleep_interruptible(int64_t timeout, AVIOInterruptCB *int_cb)
Waits for up to 'timeout' microseconds.
Definition: network.c:103
parse_set_cookie
static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
Definition: http.c:960
http_seek
static int64_t http_seek(URLContext *h, int64_t off, int whence)
Definition: http.c:2040
HTTPContext::end_off
uint64_t end_off
Definition: http.c:80
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
HTTPContext::mime_type
char * mime_type
Definition: http.c:87
av_url_split
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:354
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
http_open_cnx_internal
static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
Definition: http.c:212
url.h
HTTPContext::icy_metaint
uint64_t icy_metaint
Definition: http.c:114
http_close
static int http_close(URLContext *h)
Definition: http.c:1948
HTTPContext::resource
char * resource
Definition: http.c:134
len
int len
Definition: vorbis_enc_data.h:426
HTTPContext::reconnect
int reconnect
Definition: http.c:127
OFFSET
#define OFFSET(x)
Definition: http.c:150
version.h
ffurl_closep
int ffurl_closep(URLContext **hh)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:588
HTTPContext::handshake_step
HandshakeState handshake_step
Definition: http.c:137
ff_https_protocol
const URLProtocol ff_https_protocol
tag
uint32_t tag
Definition: movenc.c:1911
ret
ret
Definition: filter_design.txt:187
HandshakeState
HandshakeState
Definition: http.c:64
URLContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Definition: url.h:44
pos
unsigned int pos
Definition: spdifenc.c:414
avformat.h
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:99
network.h
HTTPContext::chunked_post
int chunked_post
Definition: http.c:96
HTTPContext::cookie_dict
AVDictionary * cookie_dict
Definition: http.c:109
AV_DICT_MATCH_CASE
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:74
U
#define U(x)
Definition: vpx_arith.h:37
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:129
HTTPContext::reconnect_delay_max
int reconnect_delay_max
Definition: http.c:131
av_small_strptime
char * av_small_strptime(const char *p, const char *fmt, struct tm *dt)
Simplified version of strptime.
Definition: parseutils.c:494
HTTPContext::content_type
char * content_type
Definition: http.c:91
MAX_URL_SIZE
#define MAX_URL_SIZE
Definition: internal.h:30
HTTPContext::location
char * location
Definition: http.c:82
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
http_read_header
static int http_read_header(URLContext *h)
Definition: http.c:1380
av_get_token
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
Definition: avstring.c:143
AVERROR_HTTP_FORBIDDEN
#define AVERROR_HTTP_FORBIDDEN
Definition: error.h:80
HTTP_CLASS
#define HTTP_CLASS(flavor)
Definition: http.c:2059
temp
else temp
Definition: vf_mcdeint.c:263
body
static void body(uint32_t ABCD[4], const uint8_t *src, size_t nblocks)
Definition: md5.c:103
http_get_file_handle
static int http_get_file_handle(URLContext *h)
Definition: http.c:2045
HTTP_SINGLE
#define HTTP_SINGLE
Definition: http.c:60
HTTPContext::expires
int64_t expires
Definition: http.c:140
HTTPContext::retry_after
unsigned int retry_after
Definition: http.c:145
HTTPContext::is_akamai
int is_akamai
Definition: http.c:105
av_gettime
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set() that converts the value to a string and stores it.
Definition: dict.c:177
HTTPAuthType
HTTPAuthType
Authentication types, ordered from weakest to strongest.
Definition: httpauth.h:28
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:617
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:272
HTTPContext::reply_code
int reply_code
Definition: http.c:135
FINISH
@ FINISH
Definition: http.c:68
mem.h
HTTPContext::auth_state
HTTPAuthState auth_state
Definition: http.c:83
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry
Definition: dict.h:90
headers
FFmpeg currently uses a custom build this text attempts to document some of its obscure features and options Makefile the full command issued by make and its output will be shown on the screen DBG Preprocess x86 external assembler files to a dbg asm file in the object which then gets compiled Helps in developing those assembler files DESTDIR Destination directory for the install useful to prepare packages or install FFmpeg in cross environments GEN Set to ‘1’ to generate the missing or mismatched references Makefile builds all the libraries and the executables fate Run the fate test note that you must have installed it fate list List all fate regression test targets fate list failing List the fate tests that failed the last time they were executed fate clear reports Remove the test reports from previous test libraries and programs examples Build all examples located in doc examples checkheaders Check headers dependencies alltools Build all tools in tools directory config Reconfigure the project with the current configuration tools target_dec_< decoder > _fuzzer Build fuzzer to fuzz the specified decoder tools target_bsf_< filter > _fuzzer Build fuzzer to fuzz the specified bitstream filter Useful standard make this is useful to reduce unneeded rebuilding when changing headers
Definition: build_system.txt:64
ffurl_handshake
int ffurl_handshake(URLContext *c)
Perform one step of the protocol handshake to accept a new client.
Definition: avio.c:284
ff_make_absolute_url
int 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:321
AV_OPT_FLAG_EXPORT
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:363
MAX_CACHED_REDIRECTS
#define MAX_CACHED_REDIRECTS
Definition: http.c:59
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
AVIO_FLAG_NONBLOCK
#define AVIO_FLAG_NONBLOCK
Use non-blocking mode.
Definition: avio.h:636
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
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:86
av_dict_copy
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:247
http_getc
static int http_getc(HTTPContext *s)
Definition: http.c:795
http_accept
static int http_accept(URLContext *s, URLContext **c)
Definition: http.c:771
HTTPContext::send_expect_100
int send_expect_100
Definition: http.c:125
LOWER_PROTO
@ LOWER_PROTO
Definition: http.c:65
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
HTTPContext::chunksize
uint64_t chunksize
Definition: http.c:78
h
h
Definition: vp9dsp_template.c:2070
AVERROR_EXIT
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:58
HTTPContext::icy_metadata_headers
char * icy_metadata_headers
Definition: http.c:115
av_opt_set_dict
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1986
AVDictionaryEntry::value
char * value
Definition: dict.h:92
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
av_strndup
char * av_strndup(const char *s, size_t len)
Duplicate a substring of a string.
Definition: mem.c:284
http.h
HTTPContext::willclose
int willclose
Definition: http.c:94
av_bprint_append_data
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
Append data to a print buffer.
Definition: bprint.c:163
HTTPContext::redirect_cache
AVDictionary * redirect_cache
Definition: http.c:142
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
snprintf
#define snprintf
Definition: snprintf.h:34
HTTPContext::user_agent
char * user_agent
Definition: http.c:89
store_icy
static int store_icy(URLContext *h, int size)
Definition: http.c:1838
av_dict_iterate
const AVDictionaryEntry * av_dict_iterate(const AVDictionary *m, const AVDictionaryEntry *prev)
Iterate over a dictionary.
Definition: dict.c:42
ffurl_get_file_handle
int ffurl_get_file_handle(URLContext *h)
Return the file descriptor associated with this URL.
Definition: avio.c:814
src
#define src
Definition: vp8dsp.c:248
line
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
Definition: swscale.txt:40
read
static uint32_t BS_FUNC() read(BSCTX *bc, unsigned int n)
Return n bits from the buffer, n has to be in the 0-32 range.
Definition: bitstream_template.h:231
AV_DICT_DONT_STRDUP_KEY
#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:77
HTTPContext::post_data
uint8_t * post_data
Definition: http.c:103
HTTPContext::reconnect_on_http_error
char * reconnect_on_http_error
Definition: http.c:132
HTTPContext::short_seek_size
int short_seek_size
Definition: http.c:139
ffurl_read
static int ffurl_read(URLContext *h, uint8_t *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf.
Definition: url.h:181
HTTPContext::is_multi_client
int is_multi_client
Definition: http.c:136
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