FFmpeg  4.4
http.c
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1 /*
2  * HTTP protocol for ffmpeg client
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 
24 #if CONFIG_ZLIB
25 #include <zlib.h>
26 #endif /* CONFIG_ZLIB */
27 
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/bprint.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/time.h"
33 #include "libavutil/parseutils.h"
34 
35 #include "avformat.h"
36 #include "http.h"
37 #include "httpauth.h"
38 #include "internal.h"
39 #include "network.h"
40 #include "os_support.h"
41 #include "url.h"
42 
43 /* XXX: POST protocol is not completely implemented because ffmpeg uses
44  * only a subset of it. */
45 
46 /* The IO buffer size is unrelated to the max URL size in itself, but needs
47  * to be large enough to fit the full request headers (including long
48  * path names). */
49 #define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)
50 #define MAX_REDIRECTS 8
51 #define HTTP_SINGLE 1
52 #define HTTP_MUTLI 2
53 #define MAX_EXPIRY 19
54 #define WHITESPACES " \n\t\r"
55 typedef enum {
59  FINISH
61 
62 typedef struct HTTPContext {
63  const AVClass *class;
65  unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
67  int http_code;
68  /* Used if "Transfer-Encoding: chunked" otherwise -1. */
69  uint64_t chunksize;
70  int chunkend;
71  uint64_t off, end_off, filesize;
72  char *location;
75  char *http_proxy;
76  char *headers;
77  char *mime_type;
78  char *http_version;
79  char *user_agent;
80  char *referer;
81  char *content_type;
82  /* Set if the server correctly handles Connection: close and will close
83  * the connection after feeding us the content. */
84  int willclose;
85  int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
87  /* A flag which indicates if the end of chunked encoding has been sent. */
89  /* A flag which indicates we have finished to read POST reply. */
91  /* A flag which indicates if we use persistent connections. */
95  int is_akamai;
97  char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
98  /* A dictionary containing cookies keyed by cookie name */
100  int icy;
101  /* how much data was read since the last ICY metadata packet */
102  uint64_t icy_data_read;
103  /* after how many bytes of read data a new metadata packet will be found */
104  uint64_t icy_metaint;
108 #if CONFIG_ZLIB
109  int compressed;
110  z_stream inflate_stream;
111  uint8_t *inflate_buffer;
112 #endif /* CONFIG_ZLIB */
114  /* -1 = try to send if applicable, 0 = always disabled, 1 = always enabled */
116  char *method;
123  int listen;
124  char *resource;
129 } HTTPContext;
130 
131 #define OFFSET(x) offsetof(HTTPContext, x)
132 #define D AV_OPT_FLAG_DECODING_PARAM
133 #define E AV_OPT_FLAG_ENCODING_PARAM
134 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
135 
136 static const AVOption options[] = {
137  { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D },
138  { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
139  { "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
140  { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
141  { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
142  { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
143  { "referer", "override referer header", OFFSET(referer), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
144 #if FF_API_HTTP_USER_AGENT
145  { "user-agent", "use the \"user_agent\" option instead", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D|AV_OPT_FLAG_DEPRECATED },
146 #endif
147  { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D | E },
148  { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
149  { "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 },
150  { "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 },
151  { "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 },
152  { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
153  { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
154  { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
155  { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
156  { "auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, { .i64 = HTTP_AUTH_NONE }, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D | E, "auth_type"},
157  { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
158  { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
159  { "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 },
160  { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
161  { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
162  { "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 },
163  { "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 },
164  { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
165  { "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
166  { "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 },
167  { "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 },
168  { "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
169  { "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 },
170  { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E },
171  { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
172  { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E},
173  { NULL }
174 };
175 
176 static int http_connect(URLContext *h, const char *path, const char *local_path,
177  const char *hoststr, const char *auth,
178  const char *proxyauth, int *new_location);
179 static int http_read_header(URLContext *h, int *new_location);
180 static int http_shutdown(URLContext *h, int flags);
181 
183 {
184  memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
185  &((HTTPContext *)src->priv_data)->auth_state,
186  sizeof(HTTPAuthState));
187  memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
188  &((HTTPContext *)src->priv_data)->proxy_auth_state,
189  sizeof(HTTPAuthState));
190 }
191 
193 {
194  const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
195  char *hashmark;
196  char hostname[1024], hoststr[1024], proto[10];
197  char auth[1024], proxyauth[1024] = "";
198  char path1[MAX_URL_SIZE], sanitized_path[MAX_URL_SIZE];
199  char buf[1024], urlbuf[MAX_URL_SIZE];
200  int port, use_proxy, err, location_changed = 0;
201  HTTPContext *s = h->priv_data;
202 
203  av_url_split(proto, sizeof(proto), auth, sizeof(auth),
204  hostname, sizeof(hostname), &port,
205  path1, sizeof(path1), s->location);
206  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
207 
208  proxy_path = s->http_proxy ? s->http_proxy : getenv("http_proxy");
209  use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
210  proxy_path && av_strstart(proxy_path, "http://", NULL);
211 
212  if (!strcmp(proto, "https")) {
213  lower_proto = "tls";
214  use_proxy = 0;
215  if (port < 0)
216  port = 443;
217  /* pass http_proxy to underlying protocol */
218  if (s->http_proxy) {
219  err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
220  if (err < 0)
221  return err;
222  }
223  }
224  if (port < 0)
225  port = 80;
226 
227  hashmark = strchr(path1, '#');
228  if (hashmark)
229  *hashmark = '\0';
230 
231  if (path1[0] == '\0') {
232  path = "/";
233  } else if (path1[0] == '?') {
234  snprintf(sanitized_path, sizeof(sanitized_path), "/%s", path1);
235  path = sanitized_path;
236  } else {
237  path = path1;
238  }
239  local_path = path;
240  if (use_proxy) {
241  /* Reassemble the request URL without auth string - we don't
242  * want to leak the auth to the proxy. */
243  ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
244  path1);
245  path = urlbuf;
246  av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
247  hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
248  }
249 
250  ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
251 
252  if (!s->hd) {
254  &h->interrupt_callback, options,
255  h->protocol_whitelist, h->protocol_blacklist, h);
256  if (err < 0)
257  return err;
258  }
259 
260  err = http_connect(h, path, local_path, hoststr,
261  auth, proxyauth, &location_changed);
262  if (err < 0)
263  return err;
264 
265  return location_changed;
266 }
267 
268 static int http_should_reconnect(HTTPContext *s, int err)
269 {
270  const char *status_group;
271  char http_code[4];
272 
273  switch (err) {
279  status_group = "4xx";
280  break;
281 
283  status_group = "5xx";
284  break;
285 
286  default:
287  return s->reconnect_on_network_error;
288  }
289 
290  if (!s->reconnect_on_http_error)
291  return 0;
292 
293  if (av_match_list(status_group, s->reconnect_on_http_error, ',') > 0)
294  return 1;
295 
296  snprintf(http_code, sizeof(http_code), "%d", s->http_code);
297 
298  return av_match_list(http_code, s->reconnect_on_http_error, ',') > 0;
299 }
300 
301 /* return non zero if error */
303 {
304  HTTPAuthType cur_auth_type, cur_proxy_auth_type;
305  HTTPContext *s = h->priv_data;
306  int location_changed, attempts = 0, redirects = 0;
307  int reconnect_delay = 0;
308  uint64_t off;
309 
310 redo:
311  av_dict_copy(options, s->chained_options, 0);
312 
313  cur_auth_type = s->auth_state.auth_type;
314  cur_proxy_auth_type = s->auth_state.auth_type;
315 
316  off = s->off;
317  location_changed = http_open_cnx_internal(h, options);
318  if (location_changed < 0) {
319  if (!http_should_reconnect(s, location_changed) ||
320  reconnect_delay > s->reconnect_delay_max)
321  goto fail;
322 
323  av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s).\n", off, reconnect_delay);
324  location_changed = ff_network_sleep_interruptible(1000U * 1000 * reconnect_delay, &h->interrupt_callback);
325  if (location_changed != AVERROR(ETIMEDOUT))
326  goto fail;
327  reconnect_delay = 1 + 2 * reconnect_delay;
328 
329  /* restore the offset (http_connect resets it) */
330  s->off = off;
331 
332  ffurl_closep(&s->hd);
333  goto redo;
334  }
335 
336  attempts++;
337  if (s->http_code == 401) {
338  if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
339  s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
340  ffurl_closep(&s->hd);
341  goto redo;
342  } else
343  goto fail;
344  }
345  if (s->http_code == 407) {
346  if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
347  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
348  ffurl_closep(&s->hd);
349  goto redo;
350  } else
351  goto fail;
352  }
353  if ((s->http_code == 301 || s->http_code == 302 ||
354  s->http_code == 303 || s->http_code == 307 || s->http_code == 308) &&
355  location_changed == 1) {
356  /* url moved, get next */
357  ffurl_closep(&s->hd);
358  if (redirects++ >= MAX_REDIRECTS)
359  return AVERROR(EIO);
360  /* Restart the authentication process with the new target, which
361  * might use a different auth mechanism. */
362  memset(&s->auth_state, 0, sizeof(s->auth_state));
363  attempts = 0;
364  location_changed = 0;
365  goto redo;
366  }
367  return 0;
368 
369 fail:
370  if (s->hd)
371  ffurl_closep(&s->hd);
372  if (location_changed < 0)
373  return location_changed;
374  return ff_http_averror(s->http_code, AVERROR(EIO));
375 }
377 {
378  int ret = 0;
379  HTTPContext *s = h->priv_data;
380 
381  /* flush the receive buffer when it is write only mode */
382  char buf[1024];
383  int read_ret;
384  read_ret = ffurl_read(s->hd, buf, sizeof(buf));
385  if (read_ret < 0) {
386  ret = read_ret;
387  }
388 
389  return ret;
390 }
391 
392 int ff_http_do_new_request(URLContext *h, const char *uri) {
393  return ff_http_do_new_request2(h, uri, NULL);
394 }
395 
397 {
398  HTTPContext *s = h->priv_data;
400  int ret;
401  char hostname1[1024], hostname2[1024], proto1[10], proto2[10];
402  int port1, port2;
403 
404  if (!h->prot ||
405  !(!strcmp(h->prot->name, "http") ||
406  !strcmp(h->prot->name, "https")))
407  return AVERROR(EINVAL);
408 
409  av_url_split(proto1, sizeof(proto1), NULL, 0,
410  hostname1, sizeof(hostname1), &port1,
411  NULL, 0, s->location);
412  av_url_split(proto2, sizeof(proto2), NULL, 0,
413  hostname2, sizeof(hostname2), &port2,
414  NULL, 0, uri);
415  if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
416  av_log(h, AV_LOG_ERROR, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
417  hostname1, port1,
418  hostname2, port2
419  );
420  return AVERROR(EINVAL);
421  }
422 
423  if (!s->end_chunked_post) {
424  ret = http_shutdown(h, h->flags);
425  if (ret < 0)
426  return ret;
427  }
428 
429  if (s->willclose)
430  return AVERROR_EOF;
431 
432  s->end_chunked_post = 0;
433  s->chunkend = 0;
434  s->off = 0;
435  s->icy_data_read = 0;
436  av_free(s->location);
437  s->location = av_strdup(uri);
438  if (!s->location)
439  return AVERROR(ENOMEM);
440 
441  if ((ret = av_opt_set_dict(s, opts)) < 0)
442  return ret;
443 
444  av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
445  ret = http_open_cnx(h, &options);
447  return ret;
448 }
449 
450 int ff_http_averror(int status_code, int default_averror)
451 {
452  switch (status_code) {
453  case 400: return AVERROR_HTTP_BAD_REQUEST;
454  case 401: return AVERROR_HTTP_UNAUTHORIZED;
455  case 403: return AVERROR_HTTP_FORBIDDEN;
456  case 404: return AVERROR_HTTP_NOT_FOUND;
457  default: break;
458  }
459  if (status_code >= 400 && status_code <= 499)
460  return AVERROR_HTTP_OTHER_4XX;
461  else if (status_code >= 500)
463  else
464  return default_averror;
465 }
466 
467 static int http_write_reply(URLContext* h, int status_code)
468 {
469  int ret, body = 0, reply_code, message_len;
470  const char *reply_text, *content_type;
471  HTTPContext *s = h->priv_data;
472  char message[BUFFER_SIZE];
473  content_type = "text/plain";
474 
475  if (status_code < 0)
476  body = 1;
477  switch (status_code) {
479  case 400:
480  reply_code = 400;
481  reply_text = "Bad Request";
482  break;
484  case 403:
485  reply_code = 403;
486  reply_text = "Forbidden";
487  break;
489  case 404:
490  reply_code = 404;
491  reply_text = "Not Found";
492  break;
493  case 200:
494  reply_code = 200;
495  reply_text = "OK";
496  content_type = s->content_type ? s->content_type : "application/octet-stream";
497  break;
499  case 500:
500  reply_code = 500;
501  reply_text = "Internal server error";
502  break;
503  default:
504  return AVERROR(EINVAL);
505  }
506  if (body) {
507  s->chunked_post = 0;
508  message_len = snprintf(message, sizeof(message),
509  "HTTP/1.1 %03d %s\r\n"
510  "Content-Type: %s\r\n"
511  "Content-Length: %"SIZE_SPECIFIER"\r\n"
512  "%s"
513  "\r\n"
514  "%03d %s\r\n",
515  reply_code,
516  reply_text,
517  content_type,
518  strlen(reply_text) + 6, // 3 digit status code + space + \r\n
519  s->headers ? s->headers : "",
520  reply_code,
521  reply_text);
522  } else {
523  s->chunked_post = 1;
524  message_len = snprintf(message, sizeof(message),
525  "HTTP/1.1 %03d %s\r\n"
526  "Content-Type: %s\r\n"
527  "Transfer-Encoding: chunked\r\n"
528  "%s"
529  "\r\n",
530  reply_code,
531  reply_text,
532  content_type,
533  s->headers ? s->headers : "");
534  }
535  av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
536  if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
537  return ret;
538  return 0;
539 }
540 
542 {
543  av_assert0(error < 0);
545 }
546 
548 {
549  int ret, err, new_location;
550  HTTPContext *ch = c->priv_data;
551  URLContext *cl = ch->hd;
552  switch (ch->handshake_step) {
553  case LOWER_PROTO:
554  av_log(c, AV_LOG_TRACE, "Lower protocol\n");
555  if ((ret = ffurl_handshake(cl)) > 0)
556  return 2 + ret;
557  if (ret < 0)
558  return ret;
560  ch->is_connected_server = 1;
561  return 2;
562  case READ_HEADERS:
563  av_log(c, AV_LOG_TRACE, "Read headers\n");
564  if ((err = http_read_header(c, &new_location)) < 0) {
565  handle_http_errors(c, err);
566  return err;
567  }
569  return 1;
570  case WRITE_REPLY_HEADERS:
571  av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
572  if ((err = http_write_reply(c, ch->reply_code)) < 0)
573  return err;
574  ch->handshake_step = FINISH;
575  return 1;
576  case FINISH:
577  return 0;
578  }
579  // this should never be reached.
580  return AVERROR(EINVAL);
581 }
582 
583 static int http_listen(URLContext *h, const char *uri, int flags,
584  AVDictionary **options) {
585  HTTPContext *s = h->priv_data;
586  int ret;
587  char hostname[1024], proto[10];
588  char lower_url[100];
589  const char *lower_proto = "tcp";
590  int port;
591  av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
592  NULL, 0, uri);
593  if (!strcmp(proto, "https"))
594  lower_proto = "tls";
595  ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
596  NULL);
597  if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
598  goto fail;
599  if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
600  &h->interrupt_callback, options,
601  h->protocol_whitelist, h->protocol_blacklist, h
602  )) < 0)
603  goto fail;
604  s->handshake_step = LOWER_PROTO;
605  if (s->listen == HTTP_SINGLE) { /* single client */
606  s->reply_code = 200;
607  while ((ret = http_handshake(h)) > 0);
608  }
609 fail:
610  av_dict_free(&s->chained_options);
611  return ret;
612 }
613 
614 static int http_open(URLContext *h, const char *uri, int flags,
616 {
617  HTTPContext *s = h->priv_data;
618  int ret;
619 
620  if( s->seekable == 1 )
621  h->is_streamed = 0;
622  else
623  h->is_streamed = 1;
624 
625  s->filesize = UINT64_MAX;
626  s->location = av_strdup(uri);
627  if (!s->location)
628  return AVERROR(ENOMEM);
629  if (options)
630  av_dict_copy(&s->chained_options, *options, 0);
631 
632  if (s->headers) {
633  int len = strlen(s->headers);
634  if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
636  "No trailing CRLF found in HTTP header. Adding it.\n");
637  ret = av_reallocp(&s->headers, len + 3);
638  if (ret < 0)
639  goto bail_out;
640  s->headers[len] = '\r';
641  s->headers[len + 1] = '\n';
642  s->headers[len + 2] = '\0';
643  }
644  }
645 
646  if (s->listen) {
647  return http_listen(h, uri, flags, options);
648  }
649  ret = http_open_cnx(h, options);
650 bail_out:
651  if (ret < 0)
652  av_dict_free(&s->chained_options);
653  return ret;
654 }
655 
657 {
658  int ret;
659  HTTPContext *sc = s->priv_data;
660  HTTPContext *cc;
661  URLContext *sl = sc->hd;
662  URLContext *cl = NULL;
663 
664  av_assert0(sc->listen);
665  if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
666  goto fail;
667  cc = (*c)->priv_data;
668  if ((ret = ffurl_accept(sl, &cl)) < 0)
669  goto fail;
670  cc->hd = cl;
671  cc->is_multi_client = 1;
672  return 0;
673 fail:
674  if (c) {
675  ffurl_closep(c);
676  }
677  return ret;
678 }
679 
680 static int http_getc(HTTPContext *s)
681 {
682  int len;
683  if (s->buf_ptr >= s->buf_end) {
684  len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
685  if (len < 0) {
686  return len;
687  } else if (len == 0) {
688  return AVERROR_EOF;
689  } else {
690  s->buf_ptr = s->buffer;
691  s->buf_end = s->buffer + len;
692  }
693  }
694  return *s->buf_ptr++;
695 }
696 
697 static int http_get_line(HTTPContext *s, char *line, int line_size)
698 {
699  int ch;
700  char *q;
701 
702  q = line;
703  for (;;) {
704  ch = http_getc(s);
705  if (ch < 0)
706  return ch;
707  if (ch == '\n') {
708  /* process line */
709  if (q > line && q[-1] == '\r')
710  q--;
711  *q = '\0';
712 
713  return 0;
714  } else {
715  if ((q - line) < line_size - 1)
716  *q++ = ch;
717  }
718  }
719 }
720 
721 static int check_http_code(URLContext *h, int http_code, const char *end)
722 {
723  HTTPContext *s = h->priv_data;
724  /* error codes are 4xx and 5xx, but regard 401 as a success, so we
725  * don't abort until all headers have been parsed. */
726  if (http_code >= 400 && http_code < 600 &&
727  (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
728  (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
729  end += strspn(end, SPACE_CHARS);
730  av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
731  return ff_http_averror(http_code, AVERROR(EIO));
732  }
733  return 0;
734 }
735 
736 static int parse_location(HTTPContext *s, const char *p)
737 {
738  char redirected_location[MAX_URL_SIZE], *new_loc;
739  ff_make_absolute_url(redirected_location, sizeof(redirected_location),
740  s->location, p);
741  new_loc = av_strdup(redirected_location);
742  if (!new_loc)
743  return AVERROR(ENOMEM);
744  av_free(s->location);
745  s->location = new_loc;
746  return 0;
747 }
748 
749 /* "bytes $from-$to/$document_size" */
750 static void parse_content_range(URLContext *h, const char *p)
751 {
752  HTTPContext *s = h->priv_data;
753  const char *slash;
754 
755  if (!strncmp(p, "bytes ", 6)) {
756  p += 6;
757  s->off = strtoull(p, NULL, 10);
758  if ((slash = strchr(p, '/')) && strlen(slash) > 0)
759  s->filesize = strtoull(slash + 1, NULL, 10);
760  }
761  if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
762  h->is_streamed = 0; /* we _can_ in fact seek */
763 }
764 
765 static int parse_content_encoding(URLContext *h, const char *p)
766 {
767  if (!av_strncasecmp(p, "gzip", 4) ||
768  !av_strncasecmp(p, "deflate", 7)) {
769 #if CONFIG_ZLIB
770  HTTPContext *s = h->priv_data;
771 
772  s->compressed = 1;
773  inflateEnd(&s->inflate_stream);
774  if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
775  av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
776  s->inflate_stream.msg);
777  return AVERROR(ENOSYS);
778  }
779  if (zlibCompileFlags() & (1 << 17)) {
781  "Your zlib was compiled without gzip support.\n");
782  return AVERROR(ENOSYS);
783  }
784 #else
786  "Compressed (%s) content, need zlib with gzip support\n", p);
787  return AVERROR(ENOSYS);
788 #endif /* CONFIG_ZLIB */
789  } else if (!av_strncasecmp(p, "identity", 8)) {
790  // The normal, no-encoding case (although servers shouldn't include
791  // the header at all if this is the case).
792  } else {
793  av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
794  }
795  return 0;
796 }
797 
798 // Concat all Icy- header lines
799 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
800 {
801  int len = 4 + strlen(p) + strlen(tag);
802  int is_first = !s->icy_metadata_headers;
803  int ret;
804 
805  av_dict_set(&s->metadata, tag, p, 0);
806 
807  if (s->icy_metadata_headers)
808  len += strlen(s->icy_metadata_headers);
809 
810  if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
811  return ret;
812 
813  if (is_first)
814  *s->icy_metadata_headers = '\0';
815 
816  av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
817 
818  return 0;
819 }
820 
821 static int parse_set_cookie_expiry_time(const char *exp_str, struct tm *buf)
822 {
823  char exp_buf[MAX_EXPIRY];
824  int i, j, exp_buf_len = MAX_EXPIRY-1;
825  char *expiry;
826 
827  // strip off any punctuation or whitespace
828  for (i = 0, j = 0; exp_str[i] != '\0' && j < exp_buf_len; i++) {
829  if ((exp_str[i] >= '0' && exp_str[i] <= '9') ||
830  (exp_str[i] >= 'A' && exp_str[i] <= 'Z') ||
831  (exp_str[i] >= 'a' && exp_str[i] <= 'z')) {
832  exp_buf[j] = exp_str[i];
833  j++;
834  }
835  }
836  exp_buf[j] = '\0';
837  expiry = exp_buf;
838 
839  // move the string beyond the day of week
840  while ((*expiry < '0' || *expiry > '9') && *expiry != '\0')
841  expiry++;
842 
843  return av_small_strptime(expiry, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
844 }
845 
846 static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
847 {
848  char *param, *next_param, *cstr, *back;
849  char *saveptr = NULL;
850 
851  if (!set_cookie[0])
852  return 0;
853 
854  if (!(cstr = av_strdup(set_cookie)))
855  return AVERROR(EINVAL);
856 
857  // strip any trailing whitespace
858  back = &cstr[strlen(cstr)-1];
859  while (strchr(WHITESPACES, *back)) {
860  *back='\0';
861  if (back == cstr)
862  break;
863  back--;
864  }
865 
866  next_param = cstr;
867  while ((param = av_strtok(next_param, ";", &saveptr))) {
868  char *name, *value;
869  next_param = NULL;
870  param += strspn(param, WHITESPACES);
871  if ((name = av_strtok(param, "=", &value))) {
872  if (av_dict_set(dict, name, value, 0) < 0) {
873  av_free(cstr);
874  return -1;
875  }
876  }
877  }
878 
879  av_free(cstr);
880  return 0;
881 }
882 
883 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
884 {
885  AVDictionary *new_params = NULL;
886  AVDictionaryEntry *e, *cookie_entry;
887  char *eql, *name;
888 
889  // ensure the cookie is parsable
890  if (parse_set_cookie(p, &new_params))
891  return -1;
892 
893  // if there is no cookie value there is nothing to parse
894  cookie_entry = av_dict_get(new_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
895  if (!cookie_entry || !cookie_entry->value) {
896  av_dict_free(&new_params);
897  return -1;
898  }
899 
900  // ensure the cookie is not expired or older than an existing value
901  if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
902  struct tm new_tm = {0};
903  if (!parse_set_cookie_expiry_time(e->value, &new_tm)) {
904  AVDictionaryEntry *e2;
905 
906  // if the cookie has already expired ignore it
907  if (av_timegm(&new_tm) < av_gettime() / 1000000) {
908  av_dict_free(&new_params);
909  return 0;
910  }
911 
912  // only replace an older cookie with the same name
913  e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
914  if (e2 && e2->value) {
915  AVDictionary *old_params = NULL;
916  if (!parse_set_cookie(p, &old_params)) {
917  e2 = av_dict_get(old_params, "expires", NULL, 0);
918  if (e2 && e2->value) {
919  struct tm old_tm = {0};
920  if (!parse_set_cookie_expiry_time(e->value, &old_tm)) {
921  if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
922  av_dict_free(&new_params);
923  av_dict_free(&old_params);
924  return -1;
925  }
926  }
927  }
928  }
929  av_dict_free(&old_params);
930  }
931  }
932  }
933  av_dict_free(&new_params);
934 
935  // duplicate the cookie name (dict will dupe the value)
936  if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
937  if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
938 
939  // add the cookie to the dictionary
940  av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
941 
942  return 0;
943 }
944 
945 static int cookie_string(AVDictionary *dict, char **cookies)
946 {
947  AVDictionaryEntry *e = NULL;
948  int len = 1;
949 
950  // determine how much memory is needed for the cookies string
951  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
952  len += strlen(e->key) + strlen(e->value) + 1;
953 
954  // reallocate the cookies
955  e = NULL;
956  if (*cookies) av_free(*cookies);
957  *cookies = av_malloc(len);
958  if (!*cookies) return AVERROR(ENOMEM);
959  *cookies[0] = '\0';
960 
961  // write out the cookies
962  while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
963  av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
964 
965  return 0;
966 }
967 
968 static int process_line(URLContext *h, char *line, int line_count,
969  int *new_location)
970 {
971  HTTPContext *s = h->priv_data;
972  const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
973  char *tag, *p, *end, *method, *resource, *version;
974  int ret;
975 
976  /* end of header */
977  if (line[0] == '\0') {
978  s->end_header = 1;
979  return 0;
980  }
981 
982  p = line;
983  if (line_count == 0) {
984  if (s->is_connected_server) {
985  // HTTP method
986  method = p;
987  while (*p && !av_isspace(*p))
988  p++;
989  *(p++) = '\0';
990  av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
991  if (s->method) {
992  if (av_strcasecmp(s->method, method)) {
993  av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
994  s->method, method);
995  return ff_http_averror(400, AVERROR(EIO));
996  }
997  } else {
998  // use autodetected HTTP method to expect
999  av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1000  if (av_strcasecmp(auto_method, method)) {
1001  av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1002  "(%s autodetected %s received)\n", auto_method, method);
1003  return ff_http_averror(400, AVERROR(EIO));
1004  }
1005  if (!(s->method = av_strdup(method)))
1006  return AVERROR(ENOMEM);
1007  }
1008 
1009  // HTTP resource
1010  while (av_isspace(*p))
1011  p++;
1012  resource = p;
1013  while (*p && !av_isspace(*p))
1014  p++;
1015  *(p++) = '\0';
1016  av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1017  if (!(s->resource = av_strdup(resource)))
1018  return AVERROR(ENOMEM);
1019 
1020  // HTTP version
1021  while (av_isspace(*p))
1022  p++;
1023  version = p;
1024  while (*p && !av_isspace(*p))
1025  p++;
1026  *p = '\0';
1027  if (av_strncasecmp(version, "HTTP/", 5)) {
1028  av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1029  return ff_http_averror(400, AVERROR(EIO));
1030  }
1031  av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1032  } else {
1033  if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1034  s->willclose = 1;
1035  while (*p != '/' && *p != '\0')
1036  p++;
1037  while (*p == '/')
1038  p++;
1039  av_freep(&s->http_version);
1040  s->http_version = av_strndup(p, 3);
1041  while (!av_isspace(*p) && *p != '\0')
1042  p++;
1043  while (av_isspace(*p))
1044  p++;
1045  s->http_code = strtol(p, &end, 10);
1046 
1047  av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1048 
1049  if ((ret = check_http_code(h, s->http_code, end)) < 0)
1050  return ret;
1051  }
1052  } else {
1053  while (*p != '\0' && *p != ':')
1054  p++;
1055  if (*p != ':')
1056  return 1;
1057 
1058  *p = '\0';
1059  tag = line;
1060  p++;
1061  while (av_isspace(*p))
1062  p++;
1063  if (!av_strcasecmp(tag, "Location")) {
1064  if ((ret = parse_location(s, p)) < 0)
1065  return ret;
1066  *new_location = 1;
1067  } else if (!av_strcasecmp(tag, "Content-Length") &&
1068  s->filesize == UINT64_MAX) {
1069  s->filesize = strtoull(p, NULL, 10);
1070  } else if (!av_strcasecmp(tag, "Content-Range")) {
1071  parse_content_range(h, p);
1072  } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1073  !strncmp(p, "bytes", 5) &&
1074  s->seekable == -1) {
1075  h->is_streamed = 0;
1076  } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1077  !av_strncasecmp(p, "chunked", 7)) {
1078  s->filesize = UINT64_MAX;
1079  s->chunksize = 0;
1080  } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1081  ff_http_auth_handle_header(&s->auth_state, tag, p);
1082  } else if (!av_strcasecmp(tag, "Authentication-Info")) {
1083  ff_http_auth_handle_header(&s->auth_state, tag, p);
1084  } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1085  ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1086  } else if (!av_strcasecmp(tag, "Connection")) {
1087  if (!strcmp(p, "close"))
1088  s->willclose = 1;
1089  } else if (!av_strcasecmp(tag, "Server")) {
1090  if (!av_strcasecmp(p, "AkamaiGHost")) {
1091  s->is_akamai = 1;
1092  } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1093  s->is_mediagateway = 1;
1094  }
1095  } else if (!av_strcasecmp(tag, "Content-Type")) {
1096  av_free(s->mime_type);
1097  s->mime_type = av_strdup(p);
1098  } else if (!av_strcasecmp(tag, "Set-Cookie")) {
1099  if (parse_cookie(s, p, &s->cookie_dict))
1100  av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1101  } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1102  s->icy_metaint = strtoull(p, NULL, 10);
1103  } else if (!av_strncasecmp(tag, "Icy-", 4)) {
1104  if ((ret = parse_icy(s, tag, p)) < 0)
1105  return ret;
1106  } else if (!av_strcasecmp(tag, "Content-Encoding")) {
1107  if ((ret = parse_content_encoding(h, p)) < 0)
1108  return ret;
1109  }
1110  }
1111  return 1;
1112 }
1113 
1114 /**
1115  * Create a string containing cookie values for use as a HTTP cookie header
1116  * field value for a particular path and domain from the cookie values stored in
1117  * the HTTP protocol context. The cookie string is stored in *cookies, and may
1118  * be NULL if there are no valid cookies.
1119  *
1120  * @return a negative value if an error condition occurred, 0 otherwise
1121  */
1122 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1123  const char *domain)
1124 {
1125  // cookie strings will look like Set-Cookie header field values. Multiple
1126  // Set-Cookie fields will result in multiple values delimited by a newline
1127  int ret = 0;
1128  char *cookie, *set_cookies, *next;
1129  char *saveptr = NULL;
1130 
1131  // destroy any cookies in the dictionary.
1132  av_dict_free(&s->cookie_dict);
1133 
1134  if (!s->cookies)
1135  return 0;
1136 
1137  next = set_cookies = av_strdup(s->cookies);
1138  if (!next)
1139  return AVERROR(ENOMEM);
1140 
1141  *cookies = NULL;
1142  while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1143  AVDictionary *cookie_params = NULL;
1144  AVDictionaryEntry *cookie_entry, *e;
1145 
1146  next = NULL;
1147  // store the cookie in a dict in case it is updated in the response
1148  if (parse_cookie(s, cookie, &s->cookie_dict))
1149  av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1150 
1151  // continue on to the next cookie if this one cannot be parsed
1152  if (parse_set_cookie(cookie, &cookie_params))
1153  goto skip_cookie;
1154 
1155  // if the cookie has no value, skip it
1156  cookie_entry = av_dict_get(cookie_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
1157  if (!cookie_entry || !cookie_entry->value)
1158  goto skip_cookie;
1159 
1160  // if the cookie has expired, don't add it
1161  if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1162  struct tm tm_buf = {0};
1163  if (!parse_set_cookie_expiry_time(e->value, &tm_buf)) {
1164  if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1165  goto skip_cookie;
1166  }
1167  }
1168 
1169  // if no domain in the cookie assume it appied to this request
1170  if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1171  // find the offset comparison is on the min domain (b.com, not a.b.com)
1172  int domain_offset = strlen(domain) - strlen(e->value);
1173  if (domain_offset < 0)
1174  goto skip_cookie;
1175 
1176  // match the cookie domain
1177  if (av_strcasecmp(&domain[domain_offset], e->value))
1178  goto skip_cookie;
1179  }
1180 
1181  // ensure this cookie matches the path
1182  e = av_dict_get(cookie_params, "path", NULL, 0);
1183  if (!e || av_strncasecmp(path, e->value, strlen(e->value)))
1184  goto skip_cookie;
1185 
1186  // cookie parameters match, so copy the value
1187  if (!*cookies) {
1188  *cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1189  } else {
1190  char *tmp = *cookies;
1191  *cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1192  av_free(tmp);
1193  }
1194  if (!*cookies)
1195  ret = AVERROR(ENOMEM);
1196 
1197  skip_cookie:
1198  av_dict_free(&cookie_params);
1199  }
1200 
1201  av_free(set_cookies);
1202 
1203  return ret;
1204 }
1205 
1206 static inline int has_header(const char *str, const char *header)
1207 {
1208  /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1209  if (!str)
1210  return 0;
1211  return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1212 }
1213 
1214 static int http_read_header(URLContext *h, int *new_location)
1215 {
1216  HTTPContext *s = h->priv_data;
1217  char line[MAX_URL_SIZE];
1218  int err = 0;
1219 
1220  s->chunksize = UINT64_MAX;
1221 
1222  for (;;) {
1223  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1224  return err;
1225 
1226  av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1227 
1228  err = process_line(h, line, s->line_count, new_location);
1229  if (err < 0)
1230  return err;
1231  if (err == 0)
1232  break;
1233  s->line_count++;
1234  }
1235 
1236  if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1237  h->is_streamed = 1; /* we can in fact _not_ seek */
1238 
1239  // add any new cookies into the existing cookie string
1240  cookie_string(s->cookie_dict, &s->cookies);
1241  av_dict_free(&s->cookie_dict);
1242 
1243  return err;
1244 }
1245 
1246 /**
1247  * Escape unsafe characters in path in order to pass them safely to the HTTP
1248  * request. Insipred by the algorithm in GNU wget:
1249  * - escape "%" characters not followed by two hex digits
1250  * - escape all "unsafe" characters except which are also "reserved"
1251  * - pass through everything else
1252  */
1253 static void bprint_escaped_path(AVBPrint *bp, const char *path)
1254 {
1255 #define NEEDS_ESCAPE(ch) \
1256  ((ch) <= ' ' || (ch) >= '\x7f' || \
1257  (ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1258  (ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1259  while (*path) {
1260  char buf[1024];
1261  char *q = buf;
1262  while (*path && q - buf < sizeof(buf) - 4) {
1263  if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1264  *q++ = *path++;
1265  *q++ = *path++;
1266  *q++ = *path++;
1267  } else if (NEEDS_ESCAPE(*path)) {
1268  q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1269  } else {
1270  *q++ = *path++;
1271  }
1272  }
1273  av_bprint_append_data(bp, buf, q - buf);
1274  }
1275 }
1276 
1277 static int http_connect(URLContext *h, const char *path, const char *local_path,
1278  const char *hoststr, const char *auth,
1279  const char *proxyauth, int *new_location)
1280 {
1281  HTTPContext *s = h->priv_data;
1282  int post, err;
1283  AVBPrint request;
1284  char *authstr = NULL, *proxyauthstr = NULL;
1285  uint64_t off = s->off;
1286  const char *method;
1287  int send_expect_100 = 0;
1288 
1289  av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1290 
1291  /* send http header */
1292  post = h->flags & AVIO_FLAG_WRITE;
1293 
1294  if (s->post_data) {
1295  /* force POST method and disable chunked encoding when
1296  * custom HTTP post data is set */
1297  post = 1;
1298  s->chunked_post = 0;
1299  }
1300 
1301  if (s->method)
1302  method = s->method;
1303  else
1304  method = post ? "POST" : "GET";
1305 
1306  authstr = ff_http_auth_create_response(&s->auth_state, auth,
1307  local_path, method);
1308  proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1309  local_path, method);
1310 
1311  if (post && !s->post_data) {
1312  if (s->send_expect_100 != -1) {
1313  send_expect_100 = s->send_expect_100;
1314  } else {
1315  send_expect_100 = 0;
1316  /* The user has supplied authentication but we don't know the auth type,
1317  * send Expect: 100-continue to get the 401 response including the
1318  * WWW-Authenticate header, or an 100 continue if no auth actually
1319  * is needed. */
1320  if (auth && *auth &&
1321  s->auth_state.auth_type == HTTP_AUTH_NONE &&
1322  s->http_code != 401)
1323  send_expect_100 = 1;
1324  }
1325  }
1326 
1327  av_bprintf(&request, "%s ", method);
1328  bprint_escaped_path(&request, path);
1329  av_bprintf(&request, " HTTP/1.1\r\n");
1330 
1331  if (post && s->chunked_post)
1332  av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1333  /* set default headers if needed */
1334  if (!has_header(s->headers, "\r\nUser-Agent: "))
1335  av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1336  if (s->referer) {
1337  /* set default headers if needed */
1338  if (!has_header(s->headers, "\r\nReferer: "))
1339  av_bprintf(&request, "Referer: %s\r\n", s->referer);
1340  }
1341  if (!has_header(s->headers, "\r\nAccept: "))
1342  av_bprintf(&request, "Accept: */*\r\n");
1343  // Note: we send this on purpose even when s->off is 0 when we're probing,
1344  // since it allows us to detect more reliably if a (non-conforming)
1345  // server supports seeking by analysing the reply headers.
1346  if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
1347  av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1348  if (s->end_off)
1349  av_bprintf(&request, "%"PRId64, s->end_off - 1);
1350  av_bprintf(&request, "\r\n");
1351  }
1352  if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1353  av_bprintf(&request, "Expect: 100-continue\r\n");
1354 
1355  if (!has_header(s->headers, "\r\nConnection: "))
1356  av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1357 
1358  if (!has_header(s->headers, "\r\nHost: "))
1359  av_bprintf(&request, "Host: %s\r\n", hoststr);
1360  if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1361  av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1362 
1363  if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1364  av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1365  if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1366  char *cookies = NULL;
1367  if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1368  av_bprintf(&request, "Cookie: %s\r\n", cookies);
1369  av_free(cookies);
1370  }
1371  }
1372  if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1373  av_bprintf(&request, "Icy-MetaData: 1\r\n");
1374 
1375  /* now add in custom headers */
1376  if (s->headers)
1377  av_bprintf(&request, "%s", s->headers);
1378 
1379  if (authstr)
1380  av_bprintf(&request, "%s", authstr);
1381  if (proxyauthstr)
1382  av_bprintf(&request, "Proxy-%s", proxyauthstr);
1383  av_bprintf(&request, "\r\n");
1384 
1385  av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1386 
1387  if (!av_bprint_is_complete(&request)) {
1388  av_log(h, AV_LOG_ERROR, "overlong headers\n");
1389  err = AVERROR(EINVAL);
1390  goto done;
1391  }
1392 
1393  if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1394  goto done;
1395 
1396  if (s->post_data)
1397  if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1398  goto done;
1399 
1400  /* init input buffer */
1401  s->buf_ptr = s->buffer;
1402  s->buf_end = s->buffer;
1403  s->line_count = 0;
1404  s->off = 0;
1405  s->icy_data_read = 0;
1406  s->filesize = UINT64_MAX;
1407  s->willclose = 0;
1408  s->end_chunked_post = 0;
1409  s->end_header = 0;
1410 #if CONFIG_ZLIB
1411  s->compressed = 0;
1412 #endif
1413  if (post && !s->post_data && !send_expect_100) {
1414  /* Pretend that it did work. We didn't read any header yet, since
1415  * we've still to send the POST data, but the code calling this
1416  * function will check http_code after we return. */
1417  s->http_code = 200;
1418  err = 0;
1419  goto done;
1420  }
1421 
1422  /* wait for header */
1423  err = http_read_header(h, new_location);
1424  if (err < 0)
1425  goto done;
1426 
1427  if (*new_location)
1428  s->off = off;
1429 
1430  err = (off == s->off) ? 0 : -1;
1431 done:
1432  av_freep(&authstr);
1433  av_freep(&proxyauthstr);
1434  return err;
1435 }
1436 
1437 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1438 {
1439  HTTPContext *s = h->priv_data;
1440  int len;
1441 
1442  if (s->chunksize != UINT64_MAX) {
1443  if (s->chunkend) {
1444  return AVERROR_EOF;
1445  }
1446  if (!s->chunksize) {
1447  char line[32];
1448  int err;
1449 
1450  do {
1451  if ((err = http_get_line(s, line, sizeof(line))) < 0)
1452  return err;
1453  } while (!*line); /* skip CR LF from last chunk */
1454 
1455  s->chunksize = strtoull(line, NULL, 16);
1456 
1458  "Chunked encoding data size: %"PRIu64"\n",
1459  s->chunksize);
1460 
1461  if (!s->chunksize && s->multiple_requests) {
1462  http_get_line(s, line, sizeof(line)); // read empty chunk
1463  s->chunkend = 1;
1464  return 0;
1465  }
1466  else if (!s->chunksize) {
1467  av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1468  ffurl_closep(&s->hd);
1469  return 0;
1470  }
1471  else if (s->chunksize == UINT64_MAX) {
1472  av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1473  s->chunksize);
1474  return AVERROR(EINVAL);
1475  }
1476  }
1477  size = FFMIN(size, s->chunksize);
1478  }
1479 
1480  /* read bytes from input buffer first */
1481  len = s->buf_end - s->buf_ptr;
1482  if (len > 0) {
1483  if (len > size)
1484  len = size;
1485  memcpy(buf, s->buf_ptr, len);
1486  s->buf_ptr += len;
1487  } else {
1488  uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1489  if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1490  return AVERROR_EOF;
1491  len = ffurl_read(s->hd, buf, size);
1492  if ((!len || len == AVERROR_EOF) &&
1493  (!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1495  "Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1496  s->off, target_end
1497  );
1498  return AVERROR(EIO);
1499  }
1500  }
1501  if (len > 0) {
1502  s->off += len;
1503  if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1504  av_assert0(s->chunksize >= len);
1505  s->chunksize -= len;
1506  }
1507  }
1508  return len;
1509 }
1510 
1511 #if CONFIG_ZLIB
1512 #define DECOMPRESS_BUF_SIZE (256 * 1024)
1513 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1514 {
1515  HTTPContext *s = h->priv_data;
1516  int ret;
1517 
1518  if (!s->inflate_buffer) {
1519  s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1520  if (!s->inflate_buffer)
1521  return AVERROR(ENOMEM);
1522  }
1523 
1524  if (s->inflate_stream.avail_in == 0) {
1525  int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1526  if (read <= 0)
1527  return read;
1528  s->inflate_stream.next_in = s->inflate_buffer;
1529  s->inflate_stream.avail_in = read;
1530  }
1531 
1532  s->inflate_stream.avail_out = size;
1533  s->inflate_stream.next_out = buf;
1534 
1535  ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1536  if (ret != Z_OK && ret != Z_STREAM_END)
1537  av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1538  ret, s->inflate_stream.msg);
1539 
1540  return size - s->inflate_stream.avail_out;
1541 }
1542 #endif /* CONFIG_ZLIB */
1543 
1544 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1545 
1546 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1547 {
1548  HTTPContext *s = h->priv_data;
1549  int err, new_location, read_ret;
1550  int64_t seek_ret;
1551  int reconnect_delay = 0;
1552 
1553  if (!s->hd)
1554  return AVERROR_EOF;
1555 
1556  if (s->end_chunked_post && !s->end_header) {
1557  err = http_read_header(h, &new_location);
1558  if (err < 0)
1559  return err;
1560  }
1561 
1562 #if CONFIG_ZLIB
1563  if (s->compressed)
1564  return http_buf_read_compressed(h, buf, size);
1565 #endif /* CONFIG_ZLIB */
1566  read_ret = http_buf_read(h, buf, size);
1567  while (read_ret < 0) {
1568  uint64_t target = h->is_streamed ? 0 : s->off;
1569 
1570  if (read_ret == AVERROR_EXIT)
1571  break;
1572 
1573  if (h->is_streamed && !s->reconnect_streamed)
1574  break;
1575 
1576  if (!(s->reconnect && s->filesize > 0 && s->off < s->filesize) &&
1577  !(s->reconnect_at_eof && read_ret == AVERROR_EOF))
1578  break;
1579 
1580  if (reconnect_delay > s->reconnect_delay_max)
1581  return AVERROR(EIO);
1582 
1583  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));
1584  err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1585  if (err != AVERROR(ETIMEDOUT))
1586  return err;
1587  reconnect_delay = 1 + 2*reconnect_delay;
1588  seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1589  if (seek_ret >= 0 && seek_ret != target) {
1590  av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1591  return read_ret;
1592  }
1593 
1594  read_ret = http_buf_read(h, buf, size);
1595  }
1596 
1597  return read_ret;
1598 }
1599 
1600 // Like http_read_stream(), but no short reads.
1601 // Assumes partial reads are an error.
1603 {
1604  int pos = 0;
1605  while (pos < size) {
1606  int len = http_read_stream(h, buf + pos, size - pos);
1607  if (len < 0)
1608  return len;
1609  pos += len;
1610  }
1611  return pos;
1612 }
1613 
1614 static void update_metadata(URLContext *h, char *data)
1615 {
1616  char *key;
1617  char *val;
1618  char *end;
1619  char *next = data;
1620  HTTPContext *s = h->priv_data;
1621 
1622  while (*next) {
1623  key = next;
1624  val = strstr(key, "='");
1625  if (!val)
1626  break;
1627  end = strstr(val, "';");
1628  if (!end)
1629  break;
1630 
1631  *val = '\0';
1632  *end = '\0';
1633  val += 2;
1634 
1635  av_dict_set(&s->metadata, key, val, 0);
1636  av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1637 
1638  next = end + 2;
1639  }
1640 }
1641 
1642 static int store_icy(URLContext *h, int size)
1643 {
1644  HTTPContext *s = h->priv_data;
1645  /* until next metadata packet */
1646  uint64_t remaining;
1647 
1648  if (s->icy_metaint < s->icy_data_read)
1649  return AVERROR_INVALIDDATA;
1650  remaining = s->icy_metaint - s->icy_data_read;
1651 
1652  if (!remaining) {
1653  /* The metadata packet is variable sized. It has a 1 byte header
1654  * which sets the length of the packet (divided by 16). If it's 0,
1655  * the metadata doesn't change. After the packet, icy_metaint bytes
1656  * of normal data follows. */
1657  uint8_t ch;
1658  int len = http_read_stream_all(h, &ch, 1);
1659  if (len < 0)
1660  return len;
1661  if (ch > 0) {
1662  char data[255 * 16 + 1];
1663  int ret;
1664  len = ch * 16;
1665  ret = http_read_stream_all(h, data, len);
1666  if (ret < 0)
1667  return ret;
1668  data[len + 1] = 0;
1669  if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1670  return ret;
1672  }
1673  s->icy_data_read = 0;
1674  remaining = s->icy_metaint;
1675  }
1676 
1677  return FFMIN(size, remaining);
1678 }
1679 
1680 static int http_read(URLContext *h, uint8_t *buf, int size)
1681 {
1682  HTTPContext *s = h->priv_data;
1683 
1684  if (s->icy_metaint > 0) {
1685  size = store_icy(h, size);
1686  if (size < 0)
1687  return size;
1688  }
1689 
1690  size = http_read_stream(h, buf, size);
1691  if (size > 0)
1692  s->icy_data_read += size;
1693  return size;
1694 }
1695 
1696 /* used only when posting data */
1697 static int http_write(URLContext *h, const uint8_t *buf, int size)
1698 {
1699  char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1700  int ret;
1701  char crlf[] = "\r\n";
1702  HTTPContext *s = h->priv_data;
1703 
1704  if (!s->chunked_post) {
1705  /* non-chunked data is sent without any special encoding */
1706  return ffurl_write(s->hd, buf, size);
1707  }
1708 
1709  /* silently ignore zero-size data since chunk encoding that would
1710  * signal EOF */
1711  if (size > 0) {
1712  /* upload data using chunked encoding */
1713  snprintf(temp, sizeof(temp), "%x\r\n", size);
1714 
1715  if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1716  (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1717  (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1718  return ret;
1719  }
1720  return size;
1721 }
1722 
1723 static int http_shutdown(URLContext *h, int flags)
1724 {
1725  int ret = 0;
1726  char footer[] = "0\r\n\r\n";
1727  HTTPContext *s = h->priv_data;
1728 
1729  /* signal end of chunked encoding if used */
1730  if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1731  ((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1732  ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1733  ret = ret > 0 ? 0 : ret;
1734  /* flush the receive buffer when it is write only mode */
1735  if (!(flags & AVIO_FLAG_READ)) {
1736  char buf[1024];
1737  int read_ret;
1738  s->hd->flags |= AVIO_FLAG_NONBLOCK;
1739  read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1740  s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1741  if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1742  av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1743  ret = read_ret;
1744  }
1745  }
1746  s->end_chunked_post = 1;
1747  }
1748 
1749  return ret;
1750 }
1751 
1753 {
1754  int ret = 0;
1755  HTTPContext *s = h->priv_data;
1756 
1757 #if CONFIG_ZLIB
1758  inflateEnd(&s->inflate_stream);
1759  av_freep(&s->inflate_buffer);
1760 #endif /* CONFIG_ZLIB */
1761 
1762  if (s->hd && !s->end_chunked_post)
1763  /* Close the write direction by sending the end of chunked encoding. */
1764  ret = http_shutdown(h, h->flags);
1765 
1766  if (s->hd)
1767  ffurl_closep(&s->hd);
1768  av_dict_free(&s->chained_options);
1769  return ret;
1770 }
1771 
1772 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1773 {
1774  HTTPContext *s = h->priv_data;
1775  URLContext *old_hd = s->hd;
1776  uint64_t old_off = s->off;
1777  uint8_t old_buf[BUFFER_SIZE];
1778  int old_buf_size, ret;
1780 
1781  if (whence == AVSEEK_SIZE)
1782  return s->filesize;
1783  else if (!force_reconnect &&
1784  ((whence == SEEK_CUR && off == 0) ||
1785  (whence == SEEK_SET && off == s->off)))
1786  return s->off;
1787  else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1788  return AVERROR(ENOSYS);
1789 
1790  if (whence == SEEK_CUR)
1791  off += s->off;
1792  else if (whence == SEEK_END)
1793  off += s->filesize;
1794  else if (whence != SEEK_SET)
1795  return AVERROR(EINVAL);
1796  if (off < 0)
1797  return AVERROR(EINVAL);
1798  s->off = off;
1799 
1800  if (s->off && h->is_streamed)
1801  return AVERROR(ENOSYS);
1802 
1803  /* do not try to make a new connection if seeking past the end of the file */
1804  if (s->end_off || s->filesize != UINT64_MAX) {
1805  uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
1806  if (s->off >= end_pos)
1807  return s->off;
1808  }
1809 
1810  /* we save the old context in case the seek fails */
1811  old_buf_size = s->buf_end - s->buf_ptr;
1812  memcpy(old_buf, s->buf_ptr, old_buf_size);
1813  s->hd = NULL;
1814 
1815  /* if it fails, continue on old connection */
1816  if ((ret = http_open_cnx(h, &options)) < 0) {
1818  memcpy(s->buffer, old_buf, old_buf_size);
1819  s->buf_ptr = s->buffer;
1820  s->buf_end = s->buffer + old_buf_size;
1821  s->hd = old_hd;
1822  s->off = old_off;
1823  return ret;
1824  }
1826  ffurl_close(old_hd);
1827  return off;
1828 }
1829 
1830 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1831 {
1832  return http_seek_internal(h, off, whence, 0);
1833 }
1834 
1836 {
1837  HTTPContext *s = h->priv_data;
1838  return ffurl_get_file_handle(s->hd);
1839 }
1840 
1842 {
1843  HTTPContext *s = h->priv_data;
1844  return ffurl_get_short_seek(s->hd);
1845 }
1846 
1847 #define HTTP_CLASS(flavor) \
1848 static const AVClass flavor ## _context_class = { \
1849  .class_name = # flavor, \
1850  .item_name = av_default_item_name, \
1851  .option = options, \
1852  .version = LIBAVUTIL_VERSION_INT, \
1853 }
1854 
1855 #if CONFIG_HTTP_PROTOCOL
1856 HTTP_CLASS(http);
1857 
1858 const URLProtocol ff_http_protocol = {
1859  .name = "http",
1860  .url_open2 = http_open,
1861  .url_accept = http_accept,
1862  .url_handshake = http_handshake,
1863  .url_read = http_read,
1864  .url_write = http_write,
1865  .url_seek = http_seek,
1866  .url_close = http_close,
1867  .url_get_file_handle = http_get_file_handle,
1868  .url_get_short_seek = http_get_short_seek,
1869  .url_shutdown = http_shutdown,
1870  .priv_data_size = sizeof(HTTPContext),
1871  .priv_data_class = &http_context_class,
1873  .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
1874 };
1875 #endif /* CONFIG_HTTP_PROTOCOL */
1876 
1877 #if CONFIG_HTTPS_PROTOCOL
1878 HTTP_CLASS(https);
1879 
1881  .name = "https",
1882  .url_open2 = http_open,
1883  .url_read = http_read,
1884  .url_write = http_write,
1885  .url_seek = http_seek,
1886  .url_close = http_close,
1887  .url_get_file_handle = http_get_file_handle,
1888  .url_get_short_seek = http_get_short_seek,
1889  .url_shutdown = http_shutdown,
1890  .priv_data_size = sizeof(HTTPContext),
1891  .priv_data_class = &https_context_class,
1893  .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
1894 };
1895 #endif /* CONFIG_HTTPS_PROTOCOL */
1896 
1897 #if CONFIG_HTTPPROXY_PROTOCOL
1898 static int http_proxy_close(URLContext *h)
1899 {
1900  HTTPContext *s = h->priv_data;
1901  if (s->hd)
1902  ffurl_closep(&s->hd);
1903  return 0;
1904 }
1905 
1906 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1907 {
1908  HTTPContext *s = h->priv_data;
1909  char hostname[1024], hoststr[1024];
1910  char auth[1024], pathbuf[1024], *path;
1911  char lower_url[100];
1912  int port, ret = 0, attempts = 0;
1913  HTTPAuthType cur_auth_type;
1914  char *authstr;
1915  int new_loc;
1916 
1917  if( s->seekable == 1 )
1918  h->is_streamed = 0;
1919  else
1920  h->is_streamed = 1;
1921 
1922  av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1923  pathbuf, sizeof(pathbuf), uri);
1924  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1925  path = pathbuf;
1926  if (*path == '/')
1927  path++;
1928 
1929  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1930  NULL);
1931 redo:
1932  ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1933  &h->interrupt_callback, NULL,
1934  h->protocol_whitelist, h->protocol_blacklist, h);
1935  if (ret < 0)
1936  return ret;
1937 
1938  authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1939  path, "CONNECT");
1940  snprintf(s->buffer, sizeof(s->buffer),
1941  "CONNECT %s HTTP/1.1\r\n"
1942  "Host: %s\r\n"
1943  "Connection: close\r\n"
1944  "%s%s"
1945  "\r\n",
1946  path,
1947  hoststr,
1948  authstr ? "Proxy-" : "", authstr ? authstr : "");
1949  av_freep(&authstr);
1950 
1951  if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1952  goto fail;
1953 
1954  s->buf_ptr = s->buffer;
1955  s->buf_end = s->buffer;
1956  s->line_count = 0;
1957  s->filesize = UINT64_MAX;
1958  cur_auth_type = s->proxy_auth_state.auth_type;
1959 
1960  /* Note: This uses buffering, potentially reading more than the
1961  * HTTP header. If tunneling a protocol where the server starts
1962  * the conversation, we might buffer part of that here, too.
1963  * Reading that requires using the proper ffurl_read() function
1964  * on this URLContext, not using the fd directly (as the tls
1965  * protocol does). This shouldn't be an issue for tls though,
1966  * since the client starts the conversation there, so there
1967  * is no extra data that we might buffer up here.
1968  */
1969  ret = http_read_header(h, &new_loc);
1970  if (ret < 0)
1971  goto fail;
1972 
1973  attempts++;
1974  if (s->http_code == 407 &&
1975  (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1976  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1977  ffurl_closep(&s->hd);
1978  goto redo;
1979  }
1980 
1981  if (s->http_code < 400)
1982  return 0;
1983  ret = ff_http_averror(s->http_code, AVERROR(EIO));
1984 
1985 fail:
1986  http_proxy_close(h);
1987  return ret;
1988 }
1989 
1990 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1991 {
1992  HTTPContext *s = h->priv_data;
1993  return ffurl_write(s->hd, buf, size);
1994 }
1995 
1997  .name = "httpproxy",
1998  .url_open = http_proxy_open,
1999  .url_read = http_buf_read,
2000  .url_write = http_proxy_write,
2001  .url_close = http_proxy_close,
2002  .url_get_file_handle = http_get_file_handle,
2003  .priv_data_size = sizeof(HTTPContext),
2005 };
2006 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
static double val(void *priv, double ch)
Definition: aeval.c:76
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Main libavformat public API header.
int ffurl_handshake(URLContext *c)
Perform one step of the protocol handshake to accept a new client.
Definition: avio.c:237
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:296
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf.
Definition: avio.c:401
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:309
int ffurl_get_short_seek(URLContext *h)
Return the current short seek threshold value for this URL.
Definition: avio.c:644
int ffurl_accept(URLContext *s, URLContext **c)
Accept an URLContext c on an URLContext s.
Definition: avio.c:229
int ffurl_closep(URLContext **hh)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:438
int ffurl_close(URLContext *h)
Definition: avio.c:461
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:415
int ffurl_get_file_handle(URLContext *h)
Return the file descriptor associated with this URL.
Definition: avio.c:620
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:531
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
#define AVIO_FLAG_READ_WRITE
read-write pseudo flag
Definition: avio.h:676
#define AVIO_FLAG_NONBLOCK
Use non-blocking mode.
Definition: avio.h:693
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
#define FFMIN(a, b)
Definition: common.h:105
#define NULL
Definition: coverity.c:32
double value
Definition: eval.c:98
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1656
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_BINARY
offset must point to a pointer immediately followed by an int for the length
Definition: opt.h:231
@ AV_OPT_TYPE_INT64
Definition: opt.h:226
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_DICT
Definition: opt.h:232
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
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:4795
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
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:70
#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:72
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:40
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:147
#define AVERROR_HTTP_FORBIDDEN
Definition: error.h:78
#define AVERROR_HTTP_BAD_REQUEST
Definition: error.h:76
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
#define AVERROR_HTTP_SERVER_ERROR
Definition: error.h:81
#define AVERROR_HTTP_OTHER_4XX
Definition: error.h:80
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
#define AVERROR_HTTP_UNAUTHORIZED
Definition: error.h:77
#define AVERROR(e)
Definition: error.h:43
#define AVERROR_HTTP_NOT_FOUND
Definition: error.h:79
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
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:161
char * av_strndup(const char *s, size_t len)
Duplicate a substring of a string.
Definition: mem.c:265
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:186
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle.
Definition: avstring.c:56
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:215
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:227
int av_match_list(const char *name, const char *list, char separator)
Check if a name is in a list.
Definition: avstring.c:452
int av_stristart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str independent of case.
Definition: avstring.c:45
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:225
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:465
static int http_handshake(URLContext *c)
Definition: http.c:547
#define MAX_EXPIRY
Definition: http.c:53
HandshakeState
Definition: http.c:55
@ FINISH
Definition: http.c:59
@ LOWER_PROTO
Definition: http.c:56
@ READ_HEADERS
Definition: http.c:57
@ WRITE_REPLY_HEADERS
Definition: http.c:58
#define E
Definition: http.c:133
static int http_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:614
static int cookie_string(AVDictionary *dict, char **cookies)
Definition: http.c:945
static int store_icy(URLContext *h, int size)
Definition: http.c:1642
static int parse_content_encoding(URLContext *h, const char *p)
Definition: http.c:765
static int http_shutdown(URLContext *h, int flags)
Definition: http.c:1723
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:396
static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
Definition: http.c:846
static int http_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1680
static int http_getc(HTTPContext *s)
Definition: http.c:680
static const AVOption options[]
Definition: http.c:136
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:1122
static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
Definition: http.c:192
static void parse_content_range(URLContext *h, const char *p)
Definition: http.c:750
int ff_http_get_shutdown_status(URLContext *h)
Get the HTTP shutdown response status, be used after http_shutdown.
Definition: http.c:376
static void update_metadata(URLContext *h, char *data)
Definition: http.c:1614
static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
Definition: http.c:1772
static int http_get_line(HTTPContext *s, char *line, int line_size)
Definition: http.c:697
int ff_http_averror(int status_code, int default_averror)
Definition: http.c:450
static int http_buf_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1437
static int parse_icy(HTTPContext *s, const char *tag, const char *p)
Definition: http.c:799
static int has_header(const char *str, const char *header)
Definition: http.c:1206
static int http_listen(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:583
static int process_line(URLContext *h, char *line, int line_count, int *new_location)
Definition: http.c:968
#define BUFFER_SIZE
Definition: http.c:49
static int check_http_code(URLContext *h, int http_code, const char *end)
Definition: http.c:721
static int http_get_short_seek(URLContext *h)
Definition: http.c:1841
static int http_get_file_handle(URLContext *h)
Definition: http.c:1835
void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
Initialize the authentication state based on another HTTP URLContext.
Definition: http.c:182
static int http_write_reply(URLContext *h, int status_code)
Definition: http.c:467
#define HTTP_SINGLE
Definition: http.c:51
static int http_should_reconnect(HTTPContext *s, int err)
Definition: http.c:268
static void handle_http_errors(URLContext *h, int error)
Definition: http.c:541
static int http_read_header(URLContext *h, int *new_location)
Definition: http.c:1214
#define DEFAULT_USER_AGENT
Definition: http.c:134
#define HTTP_CLASS(flavor)
Definition: http.c:1847
static int http_connect(URLContext *h, const char *path, const char *local_path, const char *hoststr, const char *auth, const char *proxyauth, int *new_location)
Definition: http.c:1277
static int parse_set_cookie_expiry_time(const char *exp_str, struct tm *buf)
Definition: http.c:821
static int http_write(URLContext *h, const uint8_t *buf, int size)
Definition: http.c:1697
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:1253
#define MAX_REDIRECTS
Definition: http.c:50
static int64_t http_seek(URLContext *h, int64_t off, int whence)
Definition: http.c:1830
#define OFFSET(x)
Definition: http.c:131
static int http_open_cnx(URLContext *h, AVDictionary **options)
Definition: http.c:302
#define WHITESPACES
Definition: http.c:54
static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
Definition: http.c:883
static int http_close(URLContext *h)
Definition: http.c:1752
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:392
#define D
Definition: http.c:132
static int http_accept(URLContext *s, URLContext **c)
Definition: http.c:656
static int http_read_stream(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1546
static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
Definition: http.c:1602
static int parse_location(HTTPContext *s, const char *p)
Definition: http.c:736
char * ff_http_auth_create_response(HTTPAuthState *state, const char *auth, const char *path, const char *method)
Definition: httpauth.c:245
void ff_http_auth_handle_header(HTTPAuthState *state, const char *key, const char *value)
Definition: httpauth.c:90
HTTPAuthType
Authentication types, ordered from weakest to strongest.
Definition: httpauth.h:28
@ HTTP_AUTH_NONE
No authentication specified.
Definition: httpauth.h:29
@ HTTP_AUTH_BASIC
HTTP 1.0 Basic auth from RFC 1945 (also in RFC 2617)
Definition: httpauth.h:30
const char * key
int i
Definition: input.c:407
#define SPACE_CHARS
Definition: internal.h:499
#define MAX_URL_SIZE
Definition: internal.h:30
common internal API header
#define SIZE_SPECIFIER
Definition: internal.h:193
version
Definition: libkvazaar.c:320
static void body(uint32_t ABCD[4], const uint8_t *src, int nblocks)
Definition: md5.c:101
uint32_t tag
Definition: movenc.c:1600
const char data[16]
Definition: mxf.c:142
int ff_network_sleep_interruptible(int64_t timeout, AVIOInterruptCB *int_cb)
Waits for up to 'timeout' microseconds.
Definition: network.c:98
int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
Definition: network.c:551
AVOptions.
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:291
#define AV_OPT_FLAG_DEPRECATED
set if option is deprecated, users should refer to AVOption.help text for more information
Definition: opt.h:295
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:286
miscellaneous OS support macros and functions.
char * av_small_strptime(const char *p, const char *fmt, struct tm *dt)
Simplified version of strptime.
Definition: parseutils.c:489
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
Definition: parseutils.c:568
misc parsing utilities
const URLProtocol ff_https_protocol
const URLProtocol ff_http_protocol
const URLProtocol ff_httpproxy_protocol
const char * name
Definition: qsvenc.c:46
static const uint8_t header[24]
Definition: sdr2.c:67
#define snprintf
Definition: snprintf.h:34
unsigned int pos
Definition: spdifenc.c:412
Describe the class of an AVClass context structure.
Definition: log.h:67
char * key
Definition: dict.h:82
char * value
Definition: dict.h:83
AVOption.
Definition: opt.h:248
HTTP Authentication state structure.
Definition: httpauth.h:55
HandshakeState handshake_step
Definition: http.c:127
int is_akamai
Definition: http.c:95
uint64_t chunksize
Definition: http.c:69
URLContext * hd
Definition: http.c:64
char * resource
Definition: http.c:124
char * method
Definition: http.c:116
unsigned char * buf_end
Definition: http.c:65
int end_chunked_post
Definition: http.c:88
uint64_t off
Definition: http.c:71
AVDictionary * chained_options
Definition: http.c:113
char * location
Definition: http.c:72
uint64_t icy_metaint
Definition: http.c:104
int reply_code
Definition: http.c:125
int listen
Definition: http.c:123
uint64_t icy_data_read
Definition: http.c:102
char * icy_metadata_packet
Definition: http.c:106
char * user_agent
Definition: http.c:79
char * reconnect_on_http_error
Definition: http.c:122
int seekable
Control seekability, 0 = disable, 1 = enable, -1 = probe.
Definition: http.c:85
char * headers
Definition: http.c:76
int http_code
Definition: http.c:67
int end_header
Definition: http.c:90
char * referer
Definition: http.c:80
int is_multi_client
Definition: http.c:126
AVDictionary * metadata
Definition: http.c:107
uint8_t * post_data
Definition: http.c:93
unsigned char buffer[BUFFER_SIZE]
Definition: http.c:65
char * content_type
Definition: http.c:81
int reconnect_on_network_error
Definition: http.c:119
char * http_version
Definition: http.c:78
int send_expect_100
Definition: http.c:115
uint64_t filesize
Definition: http.c:71
char * icy_metadata_headers
Definition: http.c:105
int willclose
Definition: http.c:84
char * mime_type
Definition: http.c:77
int is_mediagateway
Definition: http.c:96
int multiple_requests
Definition: http.c:92
char * http_proxy
Definition: http.c:75
int is_connected_server
Definition: http.c:128
HTTPAuthState proxy_auth_state
Definition: http.c:74
int reconnect_streamed
Definition: http.c:120
int icy
Definition: http.c:100
int reconnect
Definition: http.c:117
int chunked_post
Definition: http.c:86
char * cookies
holds newline ( ) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
Definition: http.c:97
uint64_t end_off
Definition: http.c:71
int post_datalen
Definition: http.c:94
HTTPAuthState auth_state
Definition: http.c:73
unsigned char * buf_ptr
Definition: http.c:65
AVDictionary * cookie_dict
Definition: http.c:99
int reconnect_at_eof
Definition: http.c:118
int reconnect_delay_max
Definition: http.c:121
int line_count
Definition: http.c:66
int chunkend
Definition: http.c:70
Definition: url.h:38
void * priv_data
Definition: url.h:41
AVIOInterruptCB interrupt_callback
Definition: url.h:47
const char * name
Definition: url.h:55
Definition: graph2dot.c:48
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static void error(const char *err)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
#define src
Definition: vp8dsp.c:255
AVDictionary * opts
Definition: movenc.c:50
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
int size
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:319
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:38
unbuffered private I/O API
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:34
else temp
Definition: vf_mcdeint.c:259
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:198
int len
static double c[64]