FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/http.c
Date: 2025-06-23 20:06:14
Exec Total Coverage
Lines: 0 1176 0.0%
Functions: 0 52 0.0%
Branches: 0 941 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 <stdbool.h>
23
24 #include "config.h"
25 #include "config_components.h"
26
27 #include <time.h>
28 #if CONFIG_ZLIB
29 #include <zlib.h>
30 #endif /* CONFIG_ZLIB */
31
32 #include "libavutil/avassert.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/bprint.h"
35 #include "libavutil/getenv_utf8.h"
36 #include "libavutil/macros.h"
37 #include "libavutil/mem.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/time.h"
40 #include "libavutil/parseutils.h"
41
42 #include "avformat.h"
43 #include "http.h"
44 #include "httpauth.h"
45 #include "internal.h"
46 #include "network.h"
47 #include "os_support.h"
48 #include "url.h"
49 #include "version.h"
50
51 /* XXX: POST protocol is not completely implemented because ffmpeg uses
52 * only a subset of it. */
53
54 /* The IO buffer size is unrelated to the max URL size in itself, but needs
55 * to be large enough to fit the full request headers (including long
56 * path names). */
57 #define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)
58 #define MAX_REDIRECTS 8
59 #define MAX_CACHED_REDIRECTS 32
60 #define HTTP_SINGLE 1
61 #define HTTP_MUTLI 2
62 #define MAX_DATE_LEN 19
63 #define WHITESPACES " \n\t\r"
64 typedef enum {
65 LOWER_PROTO,
66 READ_HEADERS,
67 WRITE_REPLY_HEADERS,
68 FINISH
69 }HandshakeState;
70
71 typedef struct HTTPContext {
72 const AVClass *class;
73 URLContext *hd;
74 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
75 int line_count;
76 int http_code;
77 /* Used if "Transfer-Encoding: chunked" otherwise -1. */
78 uint64_t chunksize;
79 int chunkend;
80 uint64_t off, end_off, filesize;
81 char *uri;
82 char *location;
83 HTTPAuthState auth_state;
84 HTTPAuthState proxy_auth_state;
85 char *http_proxy;
86 char *headers;
87 char *mime_type;
88 char *http_version;
89 char *user_agent;
90 char *referer;
91 char *content_type;
92 /* Set if the server correctly handles Connection: close and will close
93 * the connection after feeding us the content. */
94 int willclose;
95 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
96 int chunked_post;
97 /* A flag which indicates if the end of chunked encoding has been sent. */
98 int end_chunked_post;
99 /* A flag which indicates we have finished to read POST reply. */
100 int end_header;
101 /* A flag which indicates if we use persistent connections. */
102 int multiple_requests;
103 uint8_t *post_data;
104 int post_datalen;
105 int is_akamai;
106 int is_mediagateway;
107 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
108 /* A dictionary containing cookies keyed by cookie name */
109 AVDictionary *cookie_dict;
110 int icy;
111 /* how much data was read since the last ICY metadata packet */
112 uint64_t icy_data_read;
113 /* after how many bytes of read data a new metadata packet will be found */
114 uint64_t icy_metaint;
115 char *icy_metadata_headers;
116 char *icy_metadata_packet;
117 AVDictionary *metadata;
118 #if CONFIG_ZLIB
119 int compressed;
120 z_stream inflate_stream;
121 uint8_t *inflate_buffer;
122 #endif /* CONFIG_ZLIB */
123 AVDictionary *chained_options;
124 /* -1 = try to send if applicable, 0 = always disabled, 1 = always enabled */
125 int send_expect_100;
126 char *method;
127 int reconnect;
128 int reconnect_at_eof;
129 int reconnect_on_network_error;
130 int reconnect_streamed;
131 int reconnect_delay_max;
132 char *reconnect_on_http_error;
133 int listen;
134 char *resource;
135 int reply_code;
136 int is_multi_client;
137 HandshakeState handshake_step;
138 int is_connected_server;
139 int short_seek_size;
140 int64_t expires;
141 char *new_location;
142 AVDictionary *redirect_cache;
143 uint64_t filesize_from_content_range;
144 int respect_retry_after;
145 unsigned int retry_after;
146 int reconnect_max_retries;
147 int reconnect_delay_total_max;
148 } HTTPContext;
149
150 #define OFFSET(x) offsetof(HTTPContext, x)
151 #define D AV_OPT_FLAG_DECODING_PARAM
152 #define E AV_OPT_FLAG_ENCODING_PARAM
153 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
154
155 static const AVOption options[] = {
156 { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D },
157 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
158 { "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
159 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
160 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
161 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
162 { "referer", "override referer header", OFFSET(referer), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
163 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D | E },
164 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
165 { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
166 { "http_version", "export the http response version", OFFSET(http_version), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
167 { "cookies", "set cookies to be sent in applicable future requests, use newline delimited Set-Cookie HTTP field value syntax", OFFSET(cookies), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
168 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
169 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
170 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
171 { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
172 { "auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, { .i64 = HTTP_AUTH_NONE }, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D | E, .unit = "auth_type"},
173 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, .unit = "auth_type"},
174 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, .unit = "auth_type"},
175 { "send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, E },
176 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
177 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
178 { "end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
179 { "method", "Override the HTTP method or set the expected HTTP method from a client", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
180 { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
181 { "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
182 { "reconnect_on_network_error", "auto reconnect in case of tcp/tls error during connect", OFFSET(reconnect_on_network_error), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
183 { "reconnect_on_http_error", "list of http status codes to reconnect on", OFFSET(reconnect_on_http_error), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
184 { "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
185 { "reconnect_delay_max", "max reconnect delay in seconds after which to give up", OFFSET(reconnect_delay_max), AV_OPT_TYPE_INT, { .i64 = 120 }, 0, UINT_MAX/1000/1000, D },
186 { "reconnect_max_retries", "the max number of times to retry a connection", OFFSET(reconnect_max_retries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D },
187 { "reconnect_delay_total_max", "max total reconnect delay in seconds after which to give up", OFFSET(reconnect_delay_total_max), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, UINT_MAX/1000/1000, D },
188 { "respect_retry_after", "respect the Retry-After header when retrying connections", OFFSET(respect_retry_after), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
189 { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E },
190 { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
191 { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E},
192 { "short_seek_size", "Threshold to favor readahead over seek.", OFFSET(short_seek_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
193 { NULL }
194 };
195
196 static int http_connect(URLContext *h, const char *path, const char *local_path,
197 const char *hoststr, const char *auth,
198 const char *proxyauth);
199 static int http_read_header(URLContext *h);
200 static int http_shutdown(URLContext *h, int flags);
201
202 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
203 {
204 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
205 &((HTTPContext *)src->priv_data)->auth_state,
206 sizeof(HTTPAuthState));
207 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
208 &((HTTPContext *)src->priv_data)->proxy_auth_state,
209 sizeof(HTTPAuthState));
210 }
211
212 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
213 {
214 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
215 char *env_http_proxy, *env_no_proxy;
216 char *hashmark;
217 char hostname[1024], hoststr[1024], proto[10];
218 char auth[1024], proxyauth[1024] = "";
219 char path1[MAX_URL_SIZE], sanitized_path[MAX_URL_SIZE + 1];
220 char buf[1024], urlbuf[MAX_URL_SIZE];
221 int port, use_proxy, err = 0;
222 HTTPContext *s = h->priv_data;
223
224 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
225 hostname, sizeof(hostname), &port,
226 path1, sizeof(path1), s->location);
227 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
228
229 env_http_proxy = getenv_utf8("http_proxy");
230 proxy_path = s->http_proxy ? s->http_proxy : env_http_proxy;
231
232 env_no_proxy = getenv_utf8("no_proxy");
233 use_proxy = !ff_http_match_no_proxy(env_no_proxy, hostname) &&
234 proxy_path && av_strstart(proxy_path, "http://", NULL);
235 freeenv_utf8(env_no_proxy);
236
237 if (!strcmp(proto, "https")) {
238 lower_proto = "tls";
239 use_proxy = 0;
240 if (port < 0)
241 port = 443;
242 /* pass http_proxy to underlying protocol */
243 if (s->http_proxy) {
244 err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
245 if (err < 0)
246 goto end;
247 }
248 }
249 if (port < 0)
250 port = 80;
251
252 hashmark = strchr(path1, '#');
253 if (hashmark)
254 *hashmark = '\0';
255
256 if (path1[0] == '\0') {
257 path = "/";
258 } else if (path1[0] == '?') {
259 snprintf(sanitized_path, sizeof(sanitized_path), "/%s", path1);
260 path = sanitized_path;
261 } else {
262 path = path1;
263 }
264 local_path = path;
265 if (use_proxy) {
266 /* Reassemble the request URL without auth string - we don't
267 * want to leak the auth to the proxy. */
268 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
269 path1);
270 path = urlbuf;
271 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
272 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
273 }
274
275 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
276
277 if (!s->hd) {
278 err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
279 &h->interrupt_callback, options,
280 h->protocol_whitelist, h->protocol_blacklist, h);
281 }
282
283 end:
284 freeenv_utf8(env_http_proxy);
285 return err < 0 ? err : http_connect(
286 h, path, local_path, hoststr, auth, proxyauth);
287 }
288
289 static int http_should_reconnect(HTTPContext *s, int err)
290 {
291 const char *status_group;
292 char http_code[4];
293
294 switch (err) {
295 case AVERROR_HTTP_BAD_REQUEST:
296 case AVERROR_HTTP_UNAUTHORIZED:
297 case AVERROR_HTTP_FORBIDDEN:
298 case AVERROR_HTTP_NOT_FOUND:
299 case AVERROR_HTTP_TOO_MANY_REQUESTS:
300 case AVERROR_HTTP_OTHER_4XX:
301 status_group = "4xx";
302 break;
303
304 case AVERROR_HTTP_SERVER_ERROR:
305 status_group = "5xx";
306 break;
307
308 default:
309 return s->reconnect_on_network_error;
310 }
311
312 if (!s->reconnect_on_http_error)
313 return 0;
314
315 if (av_match_list(status_group, s->reconnect_on_http_error, ',') > 0)
316 return 1;
317
318 snprintf(http_code, sizeof(http_code), "%d", s->http_code);
319
320 return av_match_list(http_code, s->reconnect_on_http_error, ',') > 0;
321 }
322
323 static char *redirect_cache_get(HTTPContext *s)
324 {
325 AVDictionaryEntry *re;
326 int64_t expiry;
327 char *delim;
328
329 re = av_dict_get(s->redirect_cache, s->location, NULL, AV_DICT_MATCH_CASE);
330 if (!re) {
331 return NULL;
332 }
333
334 delim = strchr(re->value, ';');
335 if (!delim) {
336 return NULL;
337 }
338
339 expiry = strtoll(re->value, NULL, 10);
340 if (time(NULL) > expiry) {
341 return NULL;
342 }
343
344 return delim + 1;
345 }
346
347 static int redirect_cache_set(HTTPContext *s, const char *source, const char *dest, int64_t expiry)
348 {
349 char *value;
350 int ret;
351
352 value = av_asprintf("%"PRIi64";%s", expiry, dest);
353 if (!value) {
354 return AVERROR(ENOMEM);
355 }
356
357 ret = av_dict_set(&s->redirect_cache, source, value, AV_DICT_MATCH_CASE | AV_DICT_DONT_STRDUP_VAL);
358 if (ret < 0)
359 return ret;
360
361 return 0;
362 }
363
364 /* return non zero if error */
365 static int http_open_cnx(URLContext *h, AVDictionary **options)
366 {
367 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
368 HTTPContext *s = h->priv_data;
369 int ret, conn_attempts = 1, auth_attempts = 0, redirects = 0;
370 int reconnect_delay = 0;
371 int reconnect_delay_total = 0;
372 uint64_t off;
373 char *cached;
374
375 redo:
376
377 cached = redirect_cache_get(s);
378 if (cached) {
379 av_free(s->location);
380 s->location = av_strdup(cached);
381 if (!s->location) {
382 ret = AVERROR(ENOMEM);
383 goto fail;
384 }
385 goto redo;
386 }
387
388 av_dict_copy(options, s->chained_options, 0);
389
390 cur_auth_type = s->auth_state.auth_type;
391 cur_proxy_auth_type = s->auth_state.auth_type;
392
393 off = s->off;
394 ret = http_open_cnx_internal(h, options);
395 if (ret < 0) {
396 if (!http_should_reconnect(s, ret) ||
397 reconnect_delay > s->reconnect_delay_max ||
398 (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
399 reconnect_delay_total > s->reconnect_delay_total_max)
400 goto fail;
401
402 /* Both fields here are in seconds. */
403 if (s->respect_retry_after && s->retry_after > 0) {
404 reconnect_delay = s->retry_after;
405 if (reconnect_delay > s->reconnect_delay_max)
406 goto fail;
407 s->retry_after = 0;
408 }
409
410 av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s).\n", off, reconnect_delay);
411 ret = ff_network_sleep_interruptible(1000U * 1000 * reconnect_delay, &h->interrupt_callback);
412 if (ret != AVERROR(ETIMEDOUT))
413 goto fail;
414 reconnect_delay_total += reconnect_delay;
415 reconnect_delay = 1 + 2 * reconnect_delay;
416 conn_attempts++;
417
418 /* restore the offset (http_connect resets it) */
419 s->off = off;
420
421 ffurl_closep(&s->hd);
422 goto redo;
423 }
424
425 auth_attempts++;
426 if (s->http_code == 401) {
427 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
428 s->auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
429 ffurl_closep(&s->hd);
430 goto redo;
431 } else
432 goto fail;
433 }
434 if (s->http_code == 407) {
435 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
436 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
437 ffurl_closep(&s->hd);
438 goto redo;
439 } else
440 goto fail;
441 }
442 if ((s->http_code == 301 || s->http_code == 302 ||
443 s->http_code == 303 || s->http_code == 307 || s->http_code == 308) &&
444 s->new_location) {
445 /* url moved, get next */
446 ffurl_closep(&s->hd);
447 if (redirects++ >= MAX_REDIRECTS)
448 return AVERROR(EIO);
449
450 if (!s->expires) {
451 s->expires = (s->http_code == 301 || s->http_code == 308) ? INT64_MAX : -1;
452 }
453
454 if (s->expires > time(NULL) && av_dict_count(s->redirect_cache) < MAX_CACHED_REDIRECTS) {
455 redirect_cache_set(s, s->location, s->new_location, s->expires);
456 }
457
458 av_free(s->location);
459 s->location = s->new_location;
460 s->new_location = NULL;
461
462 /* Restart the authentication process with the new target, which
463 * might use a different auth mechanism. */
464 memset(&s->auth_state, 0, sizeof(s->auth_state));
465 auth_attempts = 0;
466 goto redo;
467 }
468 return 0;
469
470 fail:
471 if (s->hd)
472 ffurl_closep(&s->hd);
473 if (ret < 0)
474 return ret;
475 return ff_http_averror(s->http_code, AVERROR(EIO));
476 }
477
478 int ff_http_do_new_request(URLContext *h, const char *uri) {
479 return ff_http_do_new_request2(h, uri, NULL);
480 }
481
482 int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
483 {
484 HTTPContext *s = h->priv_data;
485 AVDictionary *options = NULL;
486 int ret;
487 char hostname1[1024], hostname2[1024], proto1[10], proto2[10];
488 int port1, port2;
489
490 if (!h->prot ||
491 !(!strcmp(h->prot->name, "http") ||
492 !strcmp(h->prot->name, "https")))
493 return AVERROR(EINVAL);
494
495 av_url_split(proto1, sizeof(proto1), NULL, 0,
496 hostname1, sizeof(hostname1), &port1,
497 NULL, 0, s->location);
498 av_url_split(proto2, sizeof(proto2), NULL, 0,
499 hostname2, sizeof(hostname2), &port2,
500 NULL, 0, uri);
501 if (strcmp(proto1, proto2) != 0) {
502 av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different protocol %s vs %s\n",
503 proto1, proto2);
504 return AVERROR(EINVAL);
505 }
506 if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
507 av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
508 hostname1, port1,
509 hostname2, port2
510 );
511 return AVERROR(EINVAL);
512 }
513
514 if (!s->end_chunked_post) {
515 ret = http_shutdown(h, h->flags);
516 if (ret < 0)
517 return ret;
518 }
519
520 if (s->willclose)
521 return AVERROR_EOF;
522
523 s->end_chunked_post = 0;
524 s->chunkend = 0;
525 s->off = 0;
526 s->icy_data_read = 0;
527
528 av_free(s->location);
529 s->location = av_strdup(uri);
530 if (!s->location)
531 return AVERROR(ENOMEM);
532
533 av_free(s->uri);
534 s->uri = av_strdup(uri);
535 if (!s->uri)
536 return AVERROR(ENOMEM);
537
538 if ((ret = av_opt_set_dict(s, opts)) < 0)
539 return ret;
540
541 av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
542 ret = http_open_cnx(h, &options);
543 av_dict_free(&options);
544 return ret;
545 }
546
547 int ff_http_averror(int status_code, int default_averror)
548 {
549 switch (status_code) {
550 case 400: return AVERROR_HTTP_BAD_REQUEST;
551 case 401: return AVERROR_HTTP_UNAUTHORIZED;
552 case 403: return AVERROR_HTTP_FORBIDDEN;
553 case 404: return AVERROR_HTTP_NOT_FOUND;
554 case 429: return AVERROR_HTTP_TOO_MANY_REQUESTS;
555 default: break;
556 }
557 if (status_code >= 400 && status_code <= 499)
558 return AVERROR_HTTP_OTHER_4XX;
559 else if (status_code >= 500)
560 return AVERROR_HTTP_SERVER_ERROR;
561 else
562 return default_averror;
563 }
564
565 const char* ff_http_get_new_location(URLContext *h)
566 {
567 HTTPContext *s = h->priv_data;
568 return s->new_location;
569 }
570
571 static int http_write_reply(URLContext* h, int status_code)
572 {
573 int ret, body = 0, reply_code, message_len;
574 const char *reply_text, *content_type;
575 HTTPContext *s = h->priv_data;
576 char message[BUFFER_SIZE];
577 content_type = "text/plain";
578
579 if (status_code < 0)
580 body = 1;
581 switch (status_code) {
582 case AVERROR_HTTP_BAD_REQUEST:
583 case 400:
584 reply_code = 400;
585 reply_text = "Bad Request";
586 break;
587 case AVERROR_HTTP_FORBIDDEN:
588 case 403:
589 reply_code = 403;
590 reply_text = "Forbidden";
591 break;
592 case AVERROR_HTTP_NOT_FOUND:
593 case 404:
594 reply_code = 404;
595 reply_text = "Not Found";
596 break;
597 case AVERROR_HTTP_TOO_MANY_REQUESTS:
598 case 429:
599 reply_code = 429;
600 reply_text = "Too Many Requests";
601 break;
602 case 200:
603 reply_code = 200;
604 reply_text = "OK";
605 content_type = s->content_type ? s->content_type : "application/octet-stream";
606 break;
607 case AVERROR_HTTP_SERVER_ERROR:
608 case 500:
609 reply_code = 500;
610 reply_text = "Internal server error";
611 break;
612 default:
613 return AVERROR(EINVAL);
614 }
615 if (body) {
616 s->chunked_post = 0;
617 message_len = snprintf(message, sizeof(message),
618 "HTTP/1.1 %03d %s\r\n"
619 "Content-Type: %s\r\n"
620 "Content-Length: %"SIZE_SPECIFIER"\r\n"
621 "%s"
622 "\r\n"
623 "%03d %s\r\n",
624 reply_code,
625 reply_text,
626 content_type,
627 strlen(reply_text) + 6, // 3 digit status code + space + \r\n
628 s->headers ? s->headers : "",
629 reply_code,
630 reply_text);
631 } else {
632 s->chunked_post = 1;
633 message_len = snprintf(message, sizeof(message),
634 "HTTP/1.1 %03d %s\r\n"
635 "Content-Type: %s\r\n"
636 "Transfer-Encoding: chunked\r\n"
637 "%s"
638 "\r\n",
639 reply_code,
640 reply_text,
641 content_type,
642 s->headers ? s->headers : "");
643 }
644 av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
645 if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
646 return ret;
647 return 0;
648 }
649
650 static void handle_http_errors(URLContext *h, int error)
651 {
652 av_assert0(error < 0);
653 http_write_reply(h, error);
654 }
655
656 static int http_handshake(URLContext *c)
657 {
658 int ret, err;
659 HTTPContext *ch = c->priv_data;
660 URLContext *cl = ch->hd;
661 switch (ch->handshake_step) {
662 case LOWER_PROTO:
663 av_log(c, AV_LOG_TRACE, "Lower protocol\n");
664 if ((ret = ffurl_handshake(cl)) > 0)
665 return 2 + ret;
666 if (ret < 0)
667 return ret;
668 ch->handshake_step = READ_HEADERS;
669 ch->is_connected_server = 1;
670 return 2;
671 case READ_HEADERS:
672 av_log(c, AV_LOG_TRACE, "Read headers\n");
673 if ((err = http_read_header(c)) < 0) {
674 handle_http_errors(c, err);
675 return err;
676 }
677 ch->handshake_step = WRITE_REPLY_HEADERS;
678 return 1;
679 case WRITE_REPLY_HEADERS:
680 av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
681 if ((err = http_write_reply(c, ch->reply_code)) < 0)
682 return err;
683 ch->handshake_step = FINISH;
684 return 1;
685 case FINISH:
686 return 0;
687 }
688 // this should never be reached.
689 return AVERROR(EINVAL);
690 }
691
692 static int http_listen(URLContext *h, const char *uri, int flags,
693 AVDictionary **options) {
694 HTTPContext *s = h->priv_data;
695 int ret;
696 char hostname[1024], proto[10];
697 char lower_url[100];
698 const char *lower_proto = "tcp";
699 int port;
700 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
701 NULL, 0, uri);
702 if (!strcmp(proto, "https"))
703 lower_proto = "tls";
704 ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
705 NULL);
706 if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
707 goto fail;
708 if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
709 &h->interrupt_callback, options,
710 h->protocol_whitelist, h->protocol_blacklist, h
711 )) < 0)
712 goto fail;
713 s->handshake_step = LOWER_PROTO;
714 if (s->listen == HTTP_SINGLE) { /* single client */
715 s->reply_code = 200;
716 while ((ret = http_handshake(h)) > 0);
717 }
718 fail:
719 av_dict_free(&s->chained_options);
720 av_dict_free(&s->cookie_dict);
721 return ret;
722 }
723
724 static int http_open(URLContext *h, const char *uri, int flags,
725 AVDictionary **options)
726 {
727 HTTPContext *s = h->priv_data;
728 int ret;
729
730 if( s->seekable == 1 )
731 h->is_streamed = 0;
732 else
733 h->is_streamed = 1;
734
735 s->filesize = UINT64_MAX;
736
737 s->location = av_strdup(uri);
738 if (!s->location)
739 return AVERROR(ENOMEM);
740
741 s->uri = av_strdup(uri);
742 if (!s->uri)
743 return AVERROR(ENOMEM);
744
745 if (options)
746 av_dict_copy(&s->chained_options, *options, 0);
747
748 if (s->headers) {
749 int len = strlen(s->headers);
750 if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
751 av_log(h, AV_LOG_WARNING,
752 "No trailing CRLF found in HTTP header. Adding it.\n");
753 ret = av_reallocp(&s->headers, len + 3);
754 if (ret < 0)
755 goto bail_out;
756 s->headers[len] = '\r';
757 s->headers[len + 1] = '\n';
758 s->headers[len + 2] = '\0';
759 }
760 }
761
762 if (s->listen) {
763 return http_listen(h, uri, flags, options);
764 }
765 ret = http_open_cnx(h, options);
766 bail_out:
767 if (ret < 0) {
768 av_dict_free(&s->chained_options);
769 av_dict_free(&s->cookie_dict);
770 av_dict_free(&s->redirect_cache);
771 av_freep(&s->new_location);
772 av_freep(&s->uri);
773 }
774 return ret;
775 }
776
777 static int http_accept(URLContext *s, URLContext **c)
778 {
779 int ret;
780 HTTPContext *sc = s->priv_data;
781 HTTPContext *cc;
782 URLContext *sl = sc->hd;
783 URLContext *cl = NULL;
784
785 av_assert0(sc->listen);
786 if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
787 goto fail;
788 cc = (*c)->priv_data;
789 if ((ret = ffurl_accept(sl, &cl)) < 0)
790 goto fail;
791 cc->hd = cl;
792 cc->is_multi_client = 1;
793 return 0;
794 fail:
795 if (c) {
796 ffurl_closep(c);
797 }
798 return ret;
799 }
800
801 static int http_getc(HTTPContext *s)
802 {
803 int len;
804 if (s->buf_ptr >= s->buf_end) {
805 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
806 if (len < 0) {
807 return len;
808 } else if (len == 0) {
809 return AVERROR_EOF;
810 } else {
811 s->buf_ptr = s->buffer;
812 s->buf_end = s->buffer + len;
813 }
814 }
815 return *s->buf_ptr++;
816 }
817
818 static int http_get_line(HTTPContext *s, char *line, int line_size)
819 {
820 int ch;
821 char *q;
822
823 q = line;
824 for (;;) {
825 ch = http_getc(s);
826 if (ch < 0)
827 return ch;
828 if (ch == '\n') {
829 /* process line */
830 if (q > line && q[-1] == '\r')
831 q--;
832 *q = '\0';
833
834 return 0;
835 } else {
836 if ((q - line) < line_size - 1)
837 *q++ = ch;
838 }
839 }
840 }
841
842 static int check_http_code(URLContext *h, int http_code, const char *end)
843 {
844 HTTPContext *s = h->priv_data;
845 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
846 * don't abort until all headers have been parsed. */
847 if (http_code >= 400 && http_code < 600 &&
848 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
849 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
850 end += strspn(end, SPACE_CHARS);
851 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
852 return ff_http_averror(http_code, AVERROR(EIO));
853 }
854 return 0;
855 }
856
857 static int parse_location(HTTPContext *s, const char *p)
858 {
859 char redirected_location[MAX_URL_SIZE];
860 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
861 s->location, p);
862 av_freep(&s->new_location);
863 s->new_location = av_strdup(redirected_location);
864 if (!s->new_location)
865 return AVERROR(ENOMEM);
866 return 0;
867 }
868
869 /* "bytes $from-$to/$document_size" */
870 static void parse_content_range(URLContext *h, const char *p)
871 {
872 HTTPContext *s = h->priv_data;
873 const char *slash;
874
875 if (!strncmp(p, "bytes ", 6)) {
876 p += 6;
877 s->off = strtoull(p, NULL, 10);
878 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
879 s->filesize_from_content_range = strtoull(slash + 1, NULL, 10);
880 }
881 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
882 h->is_streamed = 0; /* we _can_ in fact seek */
883 }
884
885 static int parse_content_encoding(URLContext *h, const char *p)
886 {
887 if (!av_strncasecmp(p, "gzip", 4) ||
888 !av_strncasecmp(p, "deflate", 7)) {
889 #if CONFIG_ZLIB
890 HTTPContext *s = h->priv_data;
891
892 s->compressed = 1;
893 inflateEnd(&s->inflate_stream);
894 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
895 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
896 s->inflate_stream.msg);
897 return AVERROR(ENOSYS);
898 }
899 if (zlibCompileFlags() & (1 << 17)) {
900 av_log(h, AV_LOG_WARNING,
901 "Your zlib was compiled without gzip support.\n");
902 return AVERROR(ENOSYS);
903 }
904 #else
905 av_log(h, AV_LOG_WARNING,
906 "Compressed (%s) content, need zlib with gzip support\n", p);
907 return AVERROR(ENOSYS);
908 #endif /* CONFIG_ZLIB */
909 } else if (!av_strncasecmp(p, "identity", 8)) {
910 // The normal, no-encoding case (although servers shouldn't include
911 // the header at all if this is the case).
912 } else {
913 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
914 }
915 return 0;
916 }
917
918 // Concat all Icy- header lines
919 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
920 {
921 int len = 4 + strlen(p) + strlen(tag);
922 int is_first = !s->icy_metadata_headers;
923 int ret;
924
925 av_dict_set(&s->metadata, tag, p, 0);
926
927 if (s->icy_metadata_headers)
928 len += strlen(s->icy_metadata_headers);
929
930 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
931 return ret;
932
933 if (is_first)
934 *s->icy_metadata_headers = '\0';
935
936 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
937
938 return 0;
939 }
940
941 static int parse_http_date(const char *date_str, struct tm *buf)
942 {
943 char date_buf[MAX_DATE_LEN];
944 int i, j, date_buf_len = MAX_DATE_LEN-1;
945 char *date;
946
947 // strip off any punctuation or whitespace
948 for (i = 0, j = 0; date_str[i] != '\0' && j < date_buf_len; i++) {
949 if ((date_str[i] >= '0' && date_str[i] <= '9') ||
950 (date_str[i] >= 'A' && date_str[i] <= 'Z') ||
951 (date_str[i] >= 'a' && date_str[i] <= 'z')) {
952 date_buf[j] = date_str[i];
953 j++;
954 }
955 }
956 date_buf[j] = '\0';
957 date = date_buf;
958
959 // move the string beyond the day of week
960 while ((*date < '0' || *date > '9') && *date != '\0')
961 date++;
962
963 return av_small_strptime(date, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
964 }
965
966 static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
967 {
968 char *param, *next_param, *cstr, *back;
969 char *saveptr = NULL;
970
971 if (!set_cookie[0])
972 return 0;
973
974 if (!(cstr = av_strdup(set_cookie)))
975 return AVERROR(EINVAL);
976
977 // strip any trailing whitespace
978 back = &cstr[strlen(cstr)-1];
979 while (strchr(WHITESPACES, *back)) {
980 *back='\0';
981 if (back == cstr)
982 break;
983 back--;
984 }
985
986 next_param = cstr;
987 while ((param = av_strtok(next_param, ";", &saveptr))) {
988 char *name, *value;
989 next_param = NULL;
990 param += strspn(param, WHITESPACES);
991 if ((name = av_strtok(param, "=", &value))) {
992 if (av_dict_set(dict, name, value, 0) < 0) {
993 av_free(cstr);
994 return -1;
995 }
996 }
997 }
998
999 av_free(cstr);
1000 return 0;
1001 }
1002
1003 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
1004 {
1005 AVDictionary *new_params = NULL;
1006 const AVDictionaryEntry *e, *cookie_entry;
1007 char *eql, *name;
1008
1009 // ensure the cookie is parsable
1010 if (parse_set_cookie(p, &new_params))
1011 return -1;
1012
1013 // if there is no cookie value there is nothing to parse
1014 cookie_entry = av_dict_iterate(new_params, NULL);
1015 if (!cookie_entry || !cookie_entry->value) {
1016 av_dict_free(&new_params);
1017 return -1;
1018 }
1019
1020 // ensure the cookie is not expired or older than an existing value
1021 if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
1022 struct tm new_tm = {0};
1023 if (!parse_http_date(e->value, &new_tm)) {
1024 AVDictionaryEntry *e2;
1025
1026 // if the cookie has already expired ignore it
1027 if (av_timegm(&new_tm) < av_gettime() / 1000000) {
1028 av_dict_free(&new_params);
1029 return 0;
1030 }
1031
1032 // only replace an older cookie with the same name
1033 e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
1034 if (e2 && e2->value) {
1035 AVDictionary *old_params = NULL;
1036 if (!parse_set_cookie(p, &old_params)) {
1037 e2 = av_dict_get(old_params, "expires", NULL, 0);
1038 if (e2 && e2->value) {
1039 struct tm old_tm = {0};
1040 if (!parse_http_date(e->value, &old_tm)) {
1041 if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
1042 av_dict_free(&new_params);
1043 av_dict_free(&old_params);
1044 return -1;
1045 }
1046 }
1047 }
1048 }
1049 av_dict_free(&old_params);
1050 }
1051 }
1052 }
1053 av_dict_free(&new_params);
1054
1055 // duplicate the cookie name (dict will dupe the value)
1056 if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
1057 if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
1058
1059 // add the cookie to the dictionary
1060 av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
1061
1062 return 0;
1063 }
1064
1065 static int cookie_string(AVDictionary *dict, char **cookies)
1066 {
1067 const AVDictionaryEntry *e = NULL;
1068 int len = 1;
1069
1070 // determine how much memory is needed for the cookies string
1071 while ((e = av_dict_iterate(dict, e)))
1072 len += strlen(e->key) + strlen(e->value) + 1;
1073
1074 // reallocate the cookies
1075 e = NULL;
1076 if (*cookies) av_free(*cookies);
1077 *cookies = av_malloc(len);
1078 if (!*cookies) return AVERROR(ENOMEM);
1079 *cookies[0] = '\0';
1080
1081 // write out the cookies
1082 while ((e = av_dict_iterate(dict, e)))
1083 av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
1084
1085 return 0;
1086 }
1087
1088 static void parse_expires(HTTPContext *s, const char *p)
1089 {
1090 struct tm tm;
1091
1092 if (!parse_http_date(p, &tm)) {
1093 s->expires = av_timegm(&tm);
1094 }
1095 }
1096
1097 static void parse_cache_control(HTTPContext *s, const char *p)
1098 {
1099 char *age;
1100 int offset;
1101
1102 /* give 'Expires' higher priority over 'Cache-Control' */
1103 if (s->expires) {
1104 return;
1105 }
1106
1107 if (av_stristr(p, "no-cache") || av_stristr(p, "no-store")) {
1108 s->expires = -1;
1109 return;
1110 }
1111
1112 age = av_stristr(p, "s-maxage=");
1113 offset = 9;
1114 if (!age) {
1115 age = av_stristr(p, "max-age=");
1116 offset = 8;
1117 }
1118
1119 if (age) {
1120 s->expires = time(NULL) + atoi(p + offset);
1121 }
1122 }
1123
1124 static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
1125 {
1126 HTTPContext *s = h->priv_data;
1127 const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
1128 char *tag, *p, *end, *method, *resource, *version;
1129 int ret;
1130
1131 /* end of header */
1132 if (line[0] == '\0') {
1133 s->end_header = 1;
1134 return 0;
1135 }
1136
1137 p = line;
1138 if (line_count == 0) {
1139 if (s->is_connected_server) {
1140 // HTTP method
1141 method = p;
1142 while (*p && !av_isspace(*p))
1143 p++;
1144 *(p++) = '\0';
1145 av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
1146 if (s->method) {
1147 if (av_strcasecmp(s->method, method)) {
1148 av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
1149 s->method, method);
1150 return ff_http_averror(400, AVERROR(EIO));
1151 }
1152 } else {
1153 // use autodetected HTTP method to expect
1154 av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1155 if (av_strcasecmp(auto_method, method)) {
1156 av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1157 "(%s autodetected %s received)\n", auto_method, method);
1158 return ff_http_averror(400, AVERROR(EIO));
1159 }
1160 if (!(s->method = av_strdup(method)))
1161 return AVERROR(ENOMEM);
1162 }
1163
1164 // HTTP resource
1165 while (av_isspace(*p))
1166 p++;
1167 resource = p;
1168 while (*p && !av_isspace(*p))
1169 p++;
1170 *(p++) = '\0';
1171 av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1172 if (!(s->resource = av_strdup(resource)))
1173 return AVERROR(ENOMEM);
1174
1175 // HTTP version
1176 while (av_isspace(*p))
1177 p++;
1178 version = p;
1179 while (*p && !av_isspace(*p))
1180 p++;
1181 *p = '\0';
1182 if (av_strncasecmp(version, "HTTP/", 5)) {
1183 av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1184 return ff_http_averror(400, AVERROR(EIO));
1185 }
1186 av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1187 } else {
1188 if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1189 s->willclose = 1;
1190 while (*p != '/' && *p != '\0')
1191 p++;
1192 while (*p == '/')
1193 p++;
1194 av_freep(&s->http_version);
1195 s->http_version = av_strndup(p, 3);
1196 while (!av_isspace(*p) && *p != '\0')
1197 p++;
1198 while (av_isspace(*p))
1199 p++;
1200 s->http_code = strtol(p, &end, 10);
1201
1202 av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1203
1204 *parsed_http_code = 1;
1205
1206 if ((ret = check_http_code(h, s->http_code, end)) < 0)
1207 return ret;
1208 }
1209 } else {
1210 while (*p != '\0' && *p != ':')
1211 p++;
1212 if (*p != ':')
1213 return 1;
1214
1215 *p = '\0';
1216 tag = line;
1217 p++;
1218 while (av_isspace(*p))
1219 p++;
1220 if (!av_strcasecmp(tag, "Location")) {
1221 if ((ret = parse_location(s, p)) < 0)
1222 return ret;
1223 } else if (!av_strcasecmp(tag, "Content-Length") &&
1224 s->filesize == UINT64_MAX) {
1225 s->filesize = strtoull(p, NULL, 10);
1226 } else if (!av_strcasecmp(tag, "Content-Range")) {
1227 parse_content_range(h, p);
1228 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1229 !strncmp(p, "bytes", 5) &&
1230 s->seekable == -1) {
1231 h->is_streamed = 0;
1232 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1233 !av_strncasecmp(p, "chunked", 7)) {
1234 s->filesize = UINT64_MAX;
1235 s->chunksize = 0;
1236 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1237 ff_http_auth_handle_header(&s->auth_state, tag, p);
1238 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
1239 ff_http_auth_handle_header(&s->auth_state, tag, p);
1240 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1241 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1242 } else if (!av_strcasecmp(tag, "Connection")) {
1243 if (!strcmp(p, "close"))
1244 s->willclose = 1;
1245 } else if (!av_strcasecmp(tag, "Server")) {
1246 if (!av_strcasecmp(p, "AkamaiGHost")) {
1247 s->is_akamai = 1;
1248 } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1249 s->is_mediagateway = 1;
1250 }
1251 } else if (!av_strcasecmp(tag, "Content-Type")) {
1252 av_free(s->mime_type);
1253 s->mime_type = av_get_token((const char **)&p, ";");
1254 } else if (!av_strcasecmp(tag, "Set-Cookie")) {
1255 if (parse_cookie(s, p, &s->cookie_dict))
1256 av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1257 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1258 s->icy_metaint = strtoull(p, NULL, 10);
1259 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
1260 if ((ret = parse_icy(s, tag, p)) < 0)
1261 return ret;
1262 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
1263 if ((ret = parse_content_encoding(h, p)) < 0)
1264 return ret;
1265 } else if (!av_strcasecmp(tag, "Expires")) {
1266 parse_expires(s, p);
1267 } else if (!av_strcasecmp(tag, "Cache-Control")) {
1268 parse_cache_control(s, p);
1269 } else if (!av_strcasecmp(tag, "Retry-After")) {
1270 /* The header can be either an integer that represents seconds, or a date. */
1271 struct tm tm;
1272 int date_ret = parse_http_date(p, &tm);
1273 if (!date_ret) {
1274 time_t retry = av_timegm(&tm);
1275 int64_t now = av_gettime() / 1000000;
1276 int64_t diff = ((int64_t) retry) - now;
1277 s->retry_after = (unsigned int) FFMAX(0, diff);
1278 } else {
1279 s->retry_after = strtoul(p, NULL, 10);
1280 }
1281 }
1282 }
1283 return 1;
1284 }
1285
1286 /**
1287 * Create a string containing cookie values for use as a HTTP cookie header
1288 * field value for a particular path and domain from the cookie values stored in
1289 * the HTTP protocol context. The cookie string is stored in *cookies, and may
1290 * be NULL if there are no valid cookies.
1291 *
1292 * @return a negative value if an error condition occurred, 0 otherwise
1293 */
1294 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1295 const char *domain)
1296 {
1297 // cookie strings will look like Set-Cookie header field values. Multiple
1298 // Set-Cookie fields will result in multiple values delimited by a newline
1299 int ret = 0;
1300 char *cookie, *set_cookies, *next;
1301 char *saveptr = NULL;
1302
1303 // destroy any cookies in the dictionary.
1304 av_dict_free(&s->cookie_dict);
1305
1306 if (!s->cookies)
1307 return 0;
1308
1309 next = set_cookies = av_strdup(s->cookies);
1310 if (!next)
1311 return AVERROR(ENOMEM);
1312
1313 *cookies = NULL;
1314 while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1315 AVDictionary *cookie_params = NULL;
1316 const AVDictionaryEntry *cookie_entry, *e;
1317
1318 next = NULL;
1319 // store the cookie in a dict in case it is updated in the response
1320 if (parse_cookie(s, cookie, &s->cookie_dict))
1321 av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1322
1323 // continue on to the next cookie if this one cannot be parsed
1324 if (parse_set_cookie(cookie, &cookie_params))
1325 goto skip_cookie;
1326
1327 // if the cookie has no value, skip it
1328 cookie_entry = av_dict_iterate(cookie_params, NULL);
1329 if (!cookie_entry || !cookie_entry->value)
1330 goto skip_cookie;
1331
1332 // if the cookie has expired, don't add it
1333 if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1334 struct tm tm_buf = {0};
1335 if (!parse_http_date(e->value, &tm_buf)) {
1336 if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1337 goto skip_cookie;
1338 }
1339 }
1340
1341 // if no domain in the cookie assume it appied to this request
1342 if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1343 // find the offset comparison is on the min domain (b.com, not a.b.com)
1344 int domain_offset = strlen(domain) - strlen(e->value);
1345 if (domain_offset < 0)
1346 goto skip_cookie;
1347
1348 // match the cookie domain
1349 if (av_strcasecmp(&domain[domain_offset], e->value))
1350 goto skip_cookie;
1351 }
1352
1353 // if a cookie path is provided, ensure the request path is within that path
1354 e = av_dict_get(cookie_params, "path", NULL, 0);
1355 if (e && av_strncasecmp(path, e->value, strlen(e->value)))
1356 goto skip_cookie;
1357
1358 // cookie parameters match, so copy the value
1359 if (!*cookies) {
1360 *cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1361 } else {
1362 char *tmp = *cookies;
1363 *cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1364 av_free(tmp);
1365 }
1366 if (!*cookies)
1367 ret = AVERROR(ENOMEM);
1368
1369 skip_cookie:
1370 av_dict_free(&cookie_params);
1371 }
1372
1373 av_free(set_cookies);
1374
1375 return ret;
1376 }
1377
1378 static inline int has_header(const char *str, const char *header)
1379 {
1380 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1381 if (!str)
1382 return 0;
1383 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1384 }
1385
1386 static int http_read_header(URLContext *h)
1387 {
1388 HTTPContext *s = h->priv_data;
1389 char line[MAX_URL_SIZE];
1390 int err = 0, http_err = 0;
1391
1392 av_freep(&s->new_location);
1393 s->expires = 0;
1394 s->chunksize = UINT64_MAX;
1395 s->filesize_from_content_range = UINT64_MAX;
1396
1397 for (;;) {
1398 int parsed_http_code = 0;
1399
1400 if ((err = http_get_line(s, line, sizeof(line))) < 0)
1401 return err;
1402
1403 av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1404
1405 err = process_line(h, line, s->line_count, &parsed_http_code);
1406 if (err < 0) {
1407 if (parsed_http_code) {
1408 http_err = err;
1409 } else {
1410 /* Prefer to return HTTP code error if we've already seen one. */
1411 if (http_err)
1412 return http_err;
1413 else
1414 return err;
1415 }
1416 }
1417 if (err == 0)
1418 break;
1419 s->line_count++;
1420 }
1421 if (http_err)
1422 return http_err;
1423
1424 // filesize from Content-Range can always be used, even if using chunked Transfer-Encoding
1425 if (s->filesize_from_content_range != UINT64_MAX)
1426 s->filesize = s->filesize_from_content_range;
1427
1428 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1429 h->is_streamed = 1; /* we can in fact _not_ seek */
1430
1431 // add any new cookies into the existing cookie string
1432 cookie_string(s->cookie_dict, &s->cookies);
1433 av_dict_free(&s->cookie_dict);
1434
1435 return err;
1436 }
1437
1438 /**
1439 * Escape unsafe characters in path in order to pass them safely to the HTTP
1440 * request. Insipred by the algorithm in GNU wget:
1441 * - escape "%" characters not followed by two hex digits
1442 * - escape all "unsafe" characters except which are also "reserved"
1443 * - pass through everything else
1444 */
1445 static void bprint_escaped_path(AVBPrint *bp, const char *path)
1446 {
1447 #define NEEDS_ESCAPE(ch) \
1448 ((ch) <= ' ' || (ch) >= '\x7f' || \
1449 (ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1450 (ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1451 while (*path) {
1452 char buf[1024];
1453 char *q = buf;
1454 while (*path && q - buf < sizeof(buf) - 4) {
1455 if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1456 *q++ = *path++;
1457 *q++ = *path++;
1458 *q++ = *path++;
1459 } else if (NEEDS_ESCAPE(*path)) {
1460 q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1461 } else {
1462 *q++ = *path++;
1463 }
1464 }
1465 av_bprint_append_data(bp, buf, q - buf);
1466 }
1467 }
1468
1469 static int http_connect(URLContext *h, const char *path, const char *local_path,
1470 const char *hoststr, const char *auth,
1471 const char *proxyauth)
1472 {
1473 HTTPContext *s = h->priv_data;
1474 int post, err;
1475 AVBPrint request;
1476 char *authstr = NULL, *proxyauthstr = NULL;
1477 uint64_t off = s->off;
1478 const char *method;
1479 int send_expect_100 = 0;
1480
1481 av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1482
1483 /* send http header */
1484 post = h->flags & AVIO_FLAG_WRITE;
1485
1486 if (s->post_data) {
1487 /* force POST method and disable chunked encoding when
1488 * custom HTTP post data is set */
1489 post = 1;
1490 s->chunked_post = 0;
1491 }
1492
1493 if (s->method)
1494 method = s->method;
1495 else
1496 method = post ? "POST" : "GET";
1497
1498 authstr = ff_http_auth_create_response(&s->auth_state, auth,
1499 local_path, method);
1500 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1501 local_path, method);
1502
1503 if (post && !s->post_data) {
1504 if (s->send_expect_100 != -1) {
1505 send_expect_100 = s->send_expect_100;
1506 } else {
1507 send_expect_100 = 0;
1508 /* The user has supplied authentication but we don't know the auth type,
1509 * send Expect: 100-continue to get the 401 response including the
1510 * WWW-Authenticate header, or an 100 continue if no auth actually
1511 * is needed. */
1512 if (auth && *auth &&
1513 s->auth_state.auth_type == HTTP_AUTH_NONE &&
1514 s->http_code != 401)
1515 send_expect_100 = 1;
1516 }
1517 }
1518
1519 av_bprintf(&request, "%s ", method);
1520 bprint_escaped_path(&request, path);
1521 av_bprintf(&request, " HTTP/1.1\r\n");
1522
1523 if (post && s->chunked_post)
1524 av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1525 /* set default headers if needed */
1526 if (!has_header(s->headers, "\r\nUser-Agent: "))
1527 av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1528 if (s->referer) {
1529 /* set default headers if needed */
1530 if (!has_header(s->headers, "\r\nReferer: "))
1531 av_bprintf(&request, "Referer: %s\r\n", s->referer);
1532 }
1533 if (!has_header(s->headers, "\r\nAccept: "))
1534 av_bprintf(&request, "Accept: */*\r\n");
1535 // Note: we send the Range header on purpose, even when we're probing,
1536 // since it allows us to detect more reliably if a (non-conforming)
1537 // server supports seeking by analysing the reply headers.
1538 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable != 0)) {
1539 av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1540 if (s->end_off)
1541 av_bprintf(&request, "%"PRId64, s->end_off - 1);
1542 av_bprintf(&request, "\r\n");
1543 }
1544 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1545 av_bprintf(&request, "Expect: 100-continue\r\n");
1546
1547 if (!has_header(s->headers, "\r\nConnection: "))
1548 av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1549
1550 if (!has_header(s->headers, "\r\nHost: "))
1551 av_bprintf(&request, "Host: %s\r\n", hoststr);
1552 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1553 av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1554
1555 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1556 av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1557 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1558 char *cookies = NULL;
1559 if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1560 av_bprintf(&request, "Cookie: %s\r\n", cookies);
1561 av_free(cookies);
1562 }
1563 }
1564 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1565 av_bprintf(&request, "Icy-MetaData: 1\r\n");
1566
1567 /* now add in custom headers */
1568 if (s->headers)
1569 av_bprintf(&request, "%s", s->headers);
1570
1571 if (authstr)
1572 av_bprintf(&request, "%s", authstr);
1573 if (proxyauthstr)
1574 av_bprintf(&request, "Proxy-%s", proxyauthstr);
1575 av_bprintf(&request, "\r\n");
1576
1577 av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1578
1579 if (!av_bprint_is_complete(&request)) {
1580 av_log(h, AV_LOG_ERROR, "overlong headers\n");
1581 err = AVERROR(EINVAL);
1582 goto done;
1583 }
1584
1585 if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1586 goto done;
1587
1588 if (s->post_data)
1589 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1590 goto done;
1591
1592 /* init input buffer */
1593 s->buf_ptr = s->buffer;
1594 s->buf_end = s->buffer;
1595 s->line_count = 0;
1596 s->off = 0;
1597 s->icy_data_read = 0;
1598 s->filesize = UINT64_MAX;
1599 s->willclose = 0;
1600 s->end_chunked_post = 0;
1601 s->end_header = 0;
1602 #if CONFIG_ZLIB
1603 s->compressed = 0;
1604 #endif
1605 if (post && !s->post_data && !send_expect_100) {
1606 /* Pretend that it did work. We didn't read any header yet, since
1607 * we've still to send the POST data, but the code calling this
1608 * function will check http_code after we return. */
1609 s->http_code = 200;
1610 err = 0;
1611 goto done;
1612 }
1613
1614 /* wait for header */
1615 err = http_read_header(h);
1616 if (err < 0)
1617 goto done;
1618
1619 if (s->new_location)
1620 s->off = off;
1621
1622 err = (off == s->off) ? 0 : -1;
1623 done:
1624 av_freep(&authstr);
1625 av_freep(&proxyauthstr);
1626 return err;
1627 }
1628
1629 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1630 {
1631 HTTPContext *s = h->priv_data;
1632 int len;
1633
1634 if (s->chunksize != UINT64_MAX) {
1635 if (s->chunkend) {
1636 return AVERROR_EOF;
1637 }
1638 if (!s->chunksize) {
1639 char line[32];
1640 int err;
1641
1642 do {
1643 if ((err = http_get_line(s, line, sizeof(line))) < 0)
1644 return err;
1645 } while (!*line); /* skip CR LF from last chunk */
1646
1647 s->chunksize = strtoull(line, NULL, 16);
1648
1649 av_log(h, AV_LOG_TRACE,
1650 "Chunked encoding data size: %"PRIu64"\n",
1651 s->chunksize);
1652
1653 if (!s->chunksize && s->multiple_requests) {
1654 http_get_line(s, line, sizeof(line)); // read empty chunk
1655 s->chunkend = 1;
1656 return 0;
1657 }
1658 else if (!s->chunksize) {
1659 av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1660 ffurl_closep(&s->hd);
1661 return 0;
1662 }
1663 else if (s->chunksize == UINT64_MAX) {
1664 av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1665 s->chunksize);
1666 return AVERROR(EINVAL);
1667 }
1668 }
1669 size = FFMIN(size, s->chunksize);
1670 }
1671
1672 /* read bytes from input buffer first */
1673 len = s->buf_end - s->buf_ptr;
1674 if (len > 0) {
1675 if (len > size)
1676 len = size;
1677 memcpy(buf, s->buf_ptr, len);
1678 s->buf_ptr += len;
1679 } else {
1680 uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1681 if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1682 return AVERROR_EOF;
1683 len = ffurl_read(s->hd, buf, size);
1684 if ((!len || len == AVERROR_EOF) &&
1685 (!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1686 av_log(h, AV_LOG_ERROR,
1687 "Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1688 s->off, target_end
1689 );
1690 return AVERROR(EIO);
1691 }
1692 }
1693 if (len > 0) {
1694 s->off += len;
1695 if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1696 av_assert0(s->chunksize >= len);
1697 s->chunksize -= len;
1698 }
1699 }
1700 return len;
1701 }
1702
1703 #if CONFIG_ZLIB
1704 #define DECOMPRESS_BUF_SIZE (256 * 1024)
1705 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1706 {
1707 HTTPContext *s = h->priv_data;
1708 int ret;
1709
1710 if (!s->inflate_buffer) {
1711 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1712 if (!s->inflate_buffer)
1713 return AVERROR(ENOMEM);
1714 }
1715
1716 if (s->inflate_stream.avail_in == 0) {
1717 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1718 if (read <= 0)
1719 return read;
1720 s->inflate_stream.next_in = s->inflate_buffer;
1721 s->inflate_stream.avail_in = read;
1722 }
1723
1724 s->inflate_stream.avail_out = size;
1725 s->inflate_stream.next_out = buf;
1726
1727 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1728 if (ret != Z_OK && ret != Z_STREAM_END)
1729 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1730 ret, s->inflate_stream.msg);
1731
1732 return size - s->inflate_stream.avail_out;
1733 }
1734 #endif /* CONFIG_ZLIB */
1735
1736 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1737
1738 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1739 {
1740 HTTPContext *s = h->priv_data;
1741 int err, read_ret;
1742 int64_t seek_ret;
1743 int reconnect_delay = 0;
1744 int reconnect_delay_total = 0;
1745 int conn_attempts = 1;
1746
1747 if (!s->hd)
1748 return AVERROR_EOF;
1749
1750 if (s->end_chunked_post && !s->end_header) {
1751 err = http_read_header(h);
1752 if (err < 0)
1753 return err;
1754 }
1755
1756 #if CONFIG_ZLIB
1757 if (s->compressed)
1758 return http_buf_read_compressed(h, buf, size);
1759 #endif /* CONFIG_ZLIB */
1760 read_ret = http_buf_read(h, buf, size);
1761 while (read_ret < 0) {
1762 uint64_t target = h->is_streamed ? 0 : s->off;
1763 bool is_premature = s->filesize > 0 && s->off < s->filesize;
1764
1765 if (read_ret == AVERROR_EXIT)
1766 break;
1767
1768 if (h->is_streamed && !s->reconnect_streamed)
1769 break;
1770
1771 if (!(s->reconnect && is_premature) &&
1772 !(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
1773 if (is_premature)
1774 return AVERROR(EIO);
1775 else
1776 break;
1777 }
1778
1779 if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
1780 reconnect_delay_total > s->reconnect_delay_total_max)
1781 return AVERROR(EIO);
1782
1783 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));
1784 err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1785 if (err != AVERROR(ETIMEDOUT))
1786 return err;
1787 reconnect_delay_total += reconnect_delay;
1788 reconnect_delay = 1 + 2*reconnect_delay;
1789 conn_attempts++;
1790 seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1791 if (seek_ret >= 0 && seek_ret != target) {
1792 av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1793 return read_ret;
1794 }
1795
1796 read_ret = http_buf_read(h, buf, size);
1797 }
1798
1799 return read_ret;
1800 }
1801
1802 // Like http_read_stream(), but no short reads.
1803 // Assumes partial reads are an error.
1804 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1805 {
1806 int pos = 0;
1807 while (pos < size) {
1808 int len = http_read_stream(h, buf + pos, size - pos);
1809 if (len < 0)
1810 return len;
1811 pos += len;
1812 }
1813 return pos;
1814 }
1815
1816 static void update_metadata(URLContext *h, char *data)
1817 {
1818 char *key;
1819 char *val;
1820 char *end;
1821 char *next = data;
1822 HTTPContext *s = h->priv_data;
1823
1824 while (*next) {
1825 key = next;
1826 val = strstr(key, "='");
1827 if (!val)
1828 break;
1829 end = strstr(val, "';");
1830 if (!end)
1831 break;
1832
1833 *val = '\0';
1834 *end = '\0';
1835 val += 2;
1836
1837 av_dict_set(&s->metadata, key, val, 0);
1838 av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1839
1840 next = end + 2;
1841 }
1842 }
1843
1844 static int store_icy(URLContext *h, int size)
1845 {
1846 HTTPContext *s = h->priv_data;
1847 /* until next metadata packet */
1848 uint64_t remaining;
1849
1850 if (s->icy_metaint < s->icy_data_read)
1851 return AVERROR_INVALIDDATA;
1852 remaining = s->icy_metaint - s->icy_data_read;
1853
1854 if (!remaining) {
1855 /* The metadata packet is variable sized. It has a 1 byte header
1856 * which sets the length of the packet (divided by 16). If it's 0,
1857 * the metadata doesn't change. After the packet, icy_metaint bytes
1858 * of normal data follows. */
1859 uint8_t ch;
1860 int len = http_read_stream_all(h, &ch, 1);
1861 if (len < 0)
1862 return len;
1863 if (ch > 0) {
1864 char data[255 * 16 + 1];
1865 int ret;
1866 len = ch * 16;
1867 ret = http_read_stream_all(h, data, len);
1868 if (ret < 0)
1869 return ret;
1870 data[len + 1] = 0;
1871 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1872 return ret;
1873 update_metadata(h, data);
1874 }
1875 s->icy_data_read = 0;
1876 remaining = s->icy_metaint;
1877 }
1878
1879 return FFMIN(size, remaining);
1880 }
1881
1882 static int http_read(URLContext *h, uint8_t *buf, int size)
1883 {
1884 HTTPContext *s = h->priv_data;
1885
1886 if (s->icy_metaint > 0) {
1887 size = store_icy(h, size);
1888 if (size < 0)
1889 return size;
1890 }
1891
1892 size = http_read_stream(h, buf, size);
1893 if (size > 0)
1894 s->icy_data_read += size;
1895 return size;
1896 }
1897
1898 /* used only when posting data */
1899 static int http_write(URLContext *h, const uint8_t *buf, int size)
1900 {
1901 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1902 int ret;
1903 char crlf[] = "\r\n";
1904 HTTPContext *s = h->priv_data;
1905
1906 if (!s->chunked_post) {
1907 /* non-chunked data is sent without any special encoding */
1908 return ffurl_write(s->hd, buf, size);
1909 }
1910
1911 /* silently ignore zero-size data since chunk encoding that would
1912 * signal EOF */
1913 if (size > 0) {
1914 /* upload data using chunked encoding */
1915 snprintf(temp, sizeof(temp), "%x\r\n", size);
1916
1917 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1918 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1919 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1920 return ret;
1921 }
1922 return size;
1923 }
1924
1925 static int http_shutdown(URLContext *h, int flags)
1926 {
1927 int ret = 0;
1928 char footer[] = "0\r\n\r\n";
1929 HTTPContext *s = h->priv_data;
1930
1931 /* signal end of chunked encoding if used */
1932 if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1933 ((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1934 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1935 ret = ret > 0 ? 0 : ret;
1936 /* flush the receive buffer when it is write only mode */
1937 if (!(flags & AVIO_FLAG_READ)) {
1938 char buf[1024];
1939 int read_ret;
1940 s->hd->flags |= AVIO_FLAG_NONBLOCK;
1941 read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1942 s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1943 if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1944 av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1945 ret = read_ret;
1946 }
1947 }
1948 s->end_chunked_post = 1;
1949 }
1950
1951 return ret;
1952 }
1953
1954 static int http_close(URLContext *h)
1955 {
1956 int ret = 0;
1957 HTTPContext *s = h->priv_data;
1958
1959 #if CONFIG_ZLIB
1960 inflateEnd(&s->inflate_stream);
1961 av_freep(&s->inflate_buffer);
1962 #endif /* CONFIG_ZLIB */
1963
1964 if (s->hd && !s->end_chunked_post)
1965 /* Close the write direction by sending the end of chunked encoding. */
1966 ret = http_shutdown(h, h->flags);
1967
1968 if (s->hd)
1969 ffurl_closep(&s->hd);
1970 av_dict_free(&s->chained_options);
1971 av_dict_free(&s->cookie_dict);
1972 av_dict_free(&s->redirect_cache);
1973 av_freep(&s->new_location);
1974 av_freep(&s->uri);
1975 return ret;
1976 }
1977
1978 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1979 {
1980 HTTPContext *s = h->priv_data;
1981 URLContext *old_hd = s->hd;
1982 uint64_t old_off = s->off;
1983 uint8_t old_buf[BUFFER_SIZE];
1984 int old_buf_size, ret;
1985 AVDictionary *options = NULL;
1986
1987 if (whence == AVSEEK_SIZE)
1988 return s->filesize;
1989 else if (!force_reconnect &&
1990 ((whence == SEEK_CUR && off == 0) ||
1991 (whence == SEEK_SET && off == s->off)))
1992 return s->off;
1993 else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1994 return AVERROR(ENOSYS);
1995
1996 if (whence == SEEK_CUR)
1997 off += s->off;
1998 else if (whence == SEEK_END)
1999 off += s->filesize;
2000 else if (whence != SEEK_SET)
2001 return AVERROR(EINVAL);
2002 if (off < 0)
2003 return AVERROR(EINVAL);
2004 s->off = off;
2005
2006 if (s->off && h->is_streamed)
2007 return AVERROR(ENOSYS);
2008
2009 /* do not try to make a new connection if seeking past the end of the file */
2010 if (s->end_off || s->filesize != UINT64_MAX) {
2011 uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
2012 if (s->off >= end_pos)
2013 return s->off;
2014 }
2015
2016 /* if the location changed (redirect), revert to the original uri */
2017 if (strcmp(s->uri, s->location)) {
2018 char *new_uri;
2019 new_uri = av_strdup(s->uri);
2020 if (!new_uri)
2021 return AVERROR(ENOMEM);
2022 av_free(s->location);
2023 s->location = new_uri;
2024 }
2025
2026 /* we save the old context in case the seek fails */
2027 old_buf_size = s->buf_end - s->buf_ptr;
2028 memcpy(old_buf, s->buf_ptr, old_buf_size);
2029 s->hd = NULL;
2030
2031 /* if it fails, continue on old connection */
2032 if ((ret = http_open_cnx(h, &options)) < 0) {
2033 av_dict_free(&options);
2034 memcpy(s->buffer, old_buf, old_buf_size);
2035 s->buf_ptr = s->buffer;
2036 s->buf_end = s->buffer + old_buf_size;
2037 s->hd = old_hd;
2038 s->off = old_off;
2039 return ret;
2040 }
2041 av_dict_free(&options);
2042 ffurl_close(old_hd);
2043 return off;
2044 }
2045
2046 static int64_t http_seek(URLContext *h, int64_t off, int whence)
2047 {
2048 return http_seek_internal(h, off, whence, 0);
2049 }
2050
2051 static int http_get_file_handle(URLContext *h)
2052 {
2053 HTTPContext *s = h->priv_data;
2054 return ffurl_get_file_handle(s->hd);
2055 }
2056
2057 static int http_get_short_seek(URLContext *h)
2058 {
2059 HTTPContext *s = h->priv_data;
2060 if (s->short_seek_size >= 1)
2061 return s->short_seek_size;
2062 return ffurl_get_short_seek(s->hd);
2063 }
2064
2065 #define HTTP_CLASS(flavor) \
2066 static const AVClass flavor ## _context_class = { \
2067 .class_name = # flavor, \
2068 .item_name = av_default_item_name, \
2069 .option = options, \
2070 .version = LIBAVUTIL_VERSION_INT, \
2071 }
2072
2073 #if CONFIG_HTTP_PROTOCOL
2074 HTTP_CLASS(http);
2075
2076 const URLProtocol ff_http_protocol = {
2077 .name = "http",
2078 .url_open2 = http_open,
2079 .url_accept = http_accept,
2080 .url_handshake = http_handshake,
2081 .url_read = http_read,
2082 .url_write = http_write,
2083 .url_seek = http_seek,
2084 .url_close = http_close,
2085 .url_get_file_handle = http_get_file_handle,
2086 .url_get_short_seek = http_get_short_seek,
2087 .url_shutdown = http_shutdown,
2088 .priv_data_size = sizeof(HTTPContext),
2089 .priv_data_class = &http_context_class,
2090 .flags = URL_PROTOCOL_FLAG_NETWORK,
2091 .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
2092 };
2093 #endif /* CONFIG_HTTP_PROTOCOL */
2094
2095 #if CONFIG_HTTPS_PROTOCOL
2096 HTTP_CLASS(https);
2097
2098 const URLProtocol ff_https_protocol = {
2099 .name = "https",
2100 .url_open2 = http_open,
2101 .url_read = http_read,
2102 .url_write = http_write,
2103 .url_seek = http_seek,
2104 .url_close = http_close,
2105 .url_get_file_handle = http_get_file_handle,
2106 .url_get_short_seek = http_get_short_seek,
2107 .url_shutdown = http_shutdown,
2108 .priv_data_size = sizeof(HTTPContext),
2109 .priv_data_class = &https_context_class,
2110 .flags = URL_PROTOCOL_FLAG_NETWORK,
2111 .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
2112 };
2113 #endif /* CONFIG_HTTPS_PROTOCOL */
2114
2115 #if CONFIG_HTTPPROXY_PROTOCOL
2116 static int http_proxy_close(URLContext *h)
2117 {
2118 HTTPContext *s = h->priv_data;
2119 if (s->hd)
2120 ffurl_closep(&s->hd);
2121 return 0;
2122 }
2123
2124 static int http_proxy_open(URLContext *h, const char *uri, int flags)
2125 {
2126 HTTPContext *s = h->priv_data;
2127 char hostname[1024], hoststr[1024];
2128 char auth[1024], pathbuf[1024], *path;
2129 char lower_url[100];
2130 int port, ret = 0, auth_attempts = 0;
2131 HTTPAuthType cur_auth_type;
2132 char *authstr;
2133
2134 if( s->seekable == 1 )
2135 h->is_streamed = 0;
2136 else
2137 h->is_streamed = 1;
2138
2139 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
2140 pathbuf, sizeof(pathbuf), uri);
2141 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
2142 path = pathbuf;
2143 if (*path == '/')
2144 path++;
2145
2146 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
2147 NULL);
2148 redo:
2149 ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
2150 &h->interrupt_callback, NULL,
2151 h->protocol_whitelist, h->protocol_blacklist, h);
2152 if (ret < 0)
2153 return ret;
2154
2155 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
2156 path, "CONNECT");
2157 snprintf(s->buffer, sizeof(s->buffer),
2158 "CONNECT %s HTTP/1.1\r\n"
2159 "Host: %s\r\n"
2160 "Connection: close\r\n"
2161 "%s%s"
2162 "\r\n",
2163 path,
2164 hoststr,
2165 authstr ? "Proxy-" : "", authstr ? authstr : "");
2166 av_freep(&authstr);
2167
2168 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
2169 goto fail;
2170
2171 s->buf_ptr = s->buffer;
2172 s->buf_end = s->buffer;
2173 s->line_count = 0;
2174 s->filesize = UINT64_MAX;
2175 cur_auth_type = s->proxy_auth_state.auth_type;
2176
2177 /* Note: This uses buffering, potentially reading more than the
2178 * HTTP header. If tunneling a protocol where the server starts
2179 * the conversation, we might buffer part of that here, too.
2180 * Reading that requires using the proper ffurl_read() function
2181 * on this URLContext, not using the fd directly (as the tls
2182 * protocol does). This shouldn't be an issue for tls though,
2183 * since the client starts the conversation there, so there
2184 * is no extra data that we might buffer up here.
2185 */
2186 ret = http_read_header(h);
2187 if (ret < 0)
2188 goto fail;
2189
2190 auth_attempts++;
2191 if (s->http_code == 407 &&
2192 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
2193 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 2) {
2194 ffurl_closep(&s->hd);
2195 goto redo;
2196 }
2197
2198 if (s->http_code < 400)
2199 return 0;
2200 ret = ff_http_averror(s->http_code, AVERROR(EIO));
2201
2202 fail:
2203 http_proxy_close(h);
2204 return ret;
2205 }
2206
2207 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
2208 {
2209 HTTPContext *s = h->priv_data;
2210 return ffurl_write(s->hd, buf, size);
2211 }
2212
2213 const URLProtocol ff_httpproxy_protocol = {
2214 .name = "httpproxy",
2215 .url_open = http_proxy_open,
2216 .url_read = http_buf_read,
2217 .url_write = http_proxy_write,
2218 .url_close = http_proxy_close,
2219 .url_get_file_handle = http_get_file_handle,
2220 .priv_data_size = sizeof(HTTPContext),
2221 .flags = URL_PROTOCOL_FLAG_NETWORK,
2222 };
2223 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
2224