FFmpeg coverage

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