FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/http.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 0 1123 0.0%
Functions: 0 51 0.0%
Branches: 0 903 0.0%

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