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 <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 (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
502		✗	av_log(h, AV_LOG_ERROR, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
503			hostname1, port1,
504			hostname2, port2
505			);
506		✗	return AVERROR(EINVAL);
507			}
508
509		✗	if (!s->end_chunked_post) {
510		✗	ret = http_shutdown(h, h->flags);
511		✗	if (ret < 0)
512		✗	return ret;
513			}
514
515		✗	if (s->willclose)
516		✗	return AVERROR_EOF;
517
518		✗	s->end_chunked_post = 0;
519		✗	s->chunkend = 0;
520		✗	s->off = 0;
521		✗	s->icy_data_read = 0;
522
523		✗	av_free(s->location);
524		✗	s->location = av_strdup(uri);
525		✗	if (!s->location)
526		✗	return AVERROR(ENOMEM);
527
528		✗	av_free(s->uri);
529		✗	s->uri = av_strdup(uri);
530		✗	if (!s->uri)
531		✗	return AVERROR(ENOMEM);
532
533		✗	if ((ret = av_opt_set_dict(s, opts)) < 0)
534		✗	return ret;
535
536		✗	av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
537		✗	ret = http_open_cnx(h, &options);
538		✗	av_dict_free(&options);
539		✗	return ret;
540			}
541
542		✗	int ff_http_averror(int status_code, int default_averror)
543			{
544		✗	switch (status_code) {
545		✗	case 400: return AVERROR_HTTP_BAD_REQUEST;
546		✗	case 401: return AVERROR_HTTP_UNAUTHORIZED;
547		✗	case 403: return AVERROR_HTTP_FORBIDDEN;
548		✗	case 404: return AVERROR_HTTP_NOT_FOUND;
549		✗	case 429: return AVERROR_HTTP_TOO_MANY_REQUESTS;
550		✗	default: break;
551			}
552		✗	if (status_code >= 400 && status_code <= 499)
553		✗	return AVERROR_HTTP_OTHER_4XX;
554		✗	else if (status_code >= 500)
555		✗	return AVERROR_HTTP_SERVER_ERROR;
556			else
557		✗	return default_averror;
558			}
559
560		✗	static int http_write_reply(URLContext* h, int status_code)
561			{
562		✗	int ret, body = 0, reply_code, message_len;
563			const char *reply_text, *content_type;
564		✗	HTTPContext *s = h->priv_data;
565			char message[BUFFER_SIZE];
566		✗	content_type = "text/plain";
567
568		✗	if (status_code < 0)
569		✗	body = 1;
570		✗	switch (status_code) {
571		✗	case AVERROR_HTTP_BAD_REQUEST:
572			case 400:
573		✗	reply_code = 400;
574		✗	reply_text = "Bad Request";
575		✗	break;
576		✗	case AVERROR_HTTP_FORBIDDEN:
577			case 403:
578		✗	reply_code = 403;
579		✗	reply_text = "Forbidden";
580		✗	break;
581		✗	case AVERROR_HTTP_NOT_FOUND:
582			case 404:
583		✗	reply_code = 404;
584		✗	reply_text = "Not Found";
585		✗	break;
586		✗	case AVERROR_HTTP_TOO_MANY_REQUESTS:
587			case 429:
588		✗	reply_code = 429;
589		✗	reply_text = "Too Many Requests";
590		✗	break;
591		✗	case 200:
592		✗	reply_code = 200;
593		✗	reply_text = "OK";
594		✗	content_type = s->content_type ? s->content_type : "application/octet-stream";
595		✗	break;
596		✗	case AVERROR_HTTP_SERVER_ERROR:
597			case 500:
598		✗	reply_code = 500;
599		✗	reply_text = "Internal server error";
600		✗	break;
601		✗	default:
602		✗	return AVERROR(EINVAL);
603			}
604		✗	if (body) {
605		✗	s->chunked_post = 0;
606		✗	message_len = snprintf(message, sizeof(message),
607			"HTTP/1.1 %03d %s\r\n"
608			"Content-Type: %s\r\n"
609			"Content-Length: %"SIZE_SPECIFIER"\r\n"
610			"%s"
611			"\r\n"
612			"%03d %s\r\n",
613			reply_code,
614			reply_text,
615			content_type,
616		✗	strlen(reply_text) + 6, // 3 digit status code + space + \r\n
617		✗	s->headers ? s->headers : "",
618			reply_code,
619			reply_text);
620			} else {
621		✗	s->chunked_post = 1;
622		✗	message_len = snprintf(message, sizeof(message),
623			"HTTP/1.1 %03d %s\r\n"
624			"Content-Type: %s\r\n"
625			"Transfer-Encoding: chunked\r\n"
626			"%s"
627			"\r\n",
628			reply_code,
629			reply_text,
630			content_type,
631		✗	s->headers ? s->headers : "");
632			}
633		✗	av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
634		✗	if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
635		✗	return ret;
636		✗	return 0;
637			}
638
639		✗	static void handle_http_errors(URLContext *h, int error)
640			{
641		✗	av_assert0(error < 0);
642		✗	http_write_reply(h, error);
643		✗	}
644
645		✗	static int http_handshake(URLContext *c)
646			{
647			int ret, err;
648		✗	HTTPContext *ch = c->priv_data;
649		✗	URLContext *cl = ch->hd;
650		✗	switch (ch->handshake_step) {
651		✗	case LOWER_PROTO:
652		✗	av_log(c, AV_LOG_TRACE, "Lower protocol\n");
653		✗	if ((ret = ffurl_handshake(cl)) > 0)
654		✗	return 2 + ret;
655		✗	if (ret < 0)
656		✗	return ret;
657		✗	ch->handshake_step = READ_HEADERS;
658		✗	ch->is_connected_server = 1;
659		✗	return 2;
660		✗	case READ_HEADERS:
661		✗	av_log(c, AV_LOG_TRACE, "Read headers\n");
662		✗	if ((err = http_read_header(c)) < 0) {
663		✗	handle_http_errors(c, err);
664		✗	return err;
665			}
666		✗	ch->handshake_step = WRITE_REPLY_HEADERS;
667		✗	return 1;
668		✗	case WRITE_REPLY_HEADERS:
669		✗	av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
670		✗	if ((err = http_write_reply(c, ch->reply_code)) < 0)
671		✗	return err;
672		✗	ch->handshake_step = FINISH;
673		✗	return 1;
674		✗	case FINISH:
675		✗	return 0;
676			}
677			// this should never be reached.
678		✗	return AVERROR(EINVAL);
679			}
680
681		✗	static int http_listen(URLContext *h, const char *uri, int flags,
682			AVDictionary **options) {
683		✗	HTTPContext *s = h->priv_data;
684			int ret;
685			char hostname[1024], proto[10];
686			char lower_url[100];
687		✗	const char *lower_proto = "tcp";
688			int port;
689		✗	av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
690			NULL, 0, uri);
691		✗	if (!strcmp(proto, "https"))
692		✗	lower_proto = "tls";
693		✗	ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
694			NULL);
695		✗	if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
696		✗	goto fail;
697		✗	if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
698		✗	&h->interrupt_callback, options,
699			h->protocol_whitelist, h->protocol_blacklist, h
700			)) < 0)
701		✗	goto fail;
702		✗	s->handshake_step = LOWER_PROTO;
703		✗	if (s->listen == HTTP_SINGLE) { /* single client */
704		✗	s->reply_code = 200;
705		✗	while ((ret = http_handshake(h)) > 0);
706			}
707		✗	fail:
708		✗	av_dict_free(&s->chained_options);
709		✗	av_dict_free(&s->cookie_dict);
710		✗	return ret;
711			}
712
713		✗	static int http_open(URLContext *h, const char *uri, int flags,
714			AVDictionary **options)
715			{
716		✗	HTTPContext *s = h->priv_data;
717			int ret;
718
719		✗	if( s->seekable == 1 )
720		✗	h->is_streamed = 0;
721			else
722		✗	h->is_streamed = 1;
723
724		✗	s->filesize = UINT64_MAX;
725
726		✗	s->location = av_strdup(uri);
727		✗	if (!s->location)
728		✗	return AVERROR(ENOMEM);
729
730		✗	s->uri = av_strdup(uri);
731		✗	if (!s->uri)
732		✗	return AVERROR(ENOMEM);
733
734		✗	if (options)
735		✗	av_dict_copy(&s->chained_options, *options, 0);
736
737		✗	if (s->headers) {
738		✗	int len = strlen(s->headers);
739		✗	if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
740		✗	av_log(h, AV_LOG_WARNING,
741			"No trailing CRLF found in HTTP header. Adding it.\n");
742		✗	ret = av_reallocp(&s->headers, len + 3);
743		✗	if (ret < 0)
744		✗	goto bail_out;
745		✗	s->headers[len] = '\r';
746		✗	s->headers[len + 1] = '\n';
747		✗	s->headers[len + 2] = '\0';
748			}
749			}
750
751		✗	if (s->listen) {
752		✗	return http_listen(h, uri, flags, options);
753			}
754		✗	ret = http_open_cnx(h, options);
755		✗	bail_out:
756		✗	if (ret < 0) {
757		✗	av_dict_free(&s->chained_options);
758		✗	av_dict_free(&s->cookie_dict);
759		✗	av_dict_free(&s->redirect_cache);
760		✗	av_freep(&s->new_location);
761		✗	av_freep(&s->uri);
762			}
763		✗	return ret;
764			}
765
766		✗	static int http_accept(URLContext *s, URLContext **c)
767			{
768			int ret;
769		✗	HTTPContext *sc = s->priv_data;
770			HTTPContext *cc;
771		✗	URLContext *sl = sc->hd;
772		✗	URLContext *cl = NULL;
773
774		✗	av_assert0(sc->listen);
775		✗	if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
776		✗	goto fail;
777		✗	cc = (*c)->priv_data;
778		✗	if ((ret = ffurl_accept(sl, &cl)) < 0)
779		✗	goto fail;
780		✗	cc->hd = cl;
781		✗	cc->is_multi_client = 1;
782		✗	return 0;
783		✗	fail:
784		✗	if (c) {
785		✗	ffurl_closep(c);
786			}
787		✗	return ret;
788			}
789
790		✗	static int http_getc(HTTPContext *s)
791			{
792			int len;
793		✗	if (s->buf_ptr >= s->buf_end) {
794		✗	len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
795		✗	if (len < 0) {
796		✗	return len;
797		✗	} else if (len == 0) {
798		✗	return AVERROR_EOF;
799			} else {
800		✗	s->buf_ptr = s->buffer;
801		✗	s->buf_end = s->buffer + len;
802			}
803			}
804		✗	return *s->buf_ptr++;
805			}
806
807		✗	static int http_get_line(HTTPContext *s, char *line, int line_size)
808			{
809			int ch;
810			char *q;
811
812		✗	q = line;
813			for (;;) {
814		✗	ch = http_getc(s);
815		✗	if (ch < 0)
816		✗	return ch;
817		✗	if (ch == '\n') {
818			/* process line */
819		✗	if (q > line && q[-1] == '\r')
820		✗	q--;
821		✗	*q = '\0';
822
823		✗	return 0;
824			} else {
825		✗	if ((q - line) < line_size - 1)
826		✗	*q++ = ch;
827			}
828			}
829			}
830
831		✗	static int check_http_code(URLContext *h, int http_code, const char *end)
832			{
833		✗	HTTPContext *s = h->priv_data;
834			/* error codes are 4xx and 5xx, but regard 401 as a success, so we
835			* don't abort until all headers have been parsed. */
836		✗	if (http_code >= 400 && http_code < 600 &&
837		✗	(http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
838		✗	(http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
839		✗	end += strspn(end, SPACE_CHARS);
840		✗	av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
841		✗	return ff_http_averror(http_code, AVERROR(EIO));
842			}
843		✗	return 0;
844			}
845
846		✗	static int parse_location(HTTPContext *s, const char *p)
847			{
848			char redirected_location[MAX_URL_SIZE];
849		✗	ff_make_absolute_url(redirected_location, sizeof(redirected_location),
850		✗	s->location, p);
851		✗	av_freep(&s->new_location);
852		✗	s->new_location = av_strdup(redirected_location);
853		✗	if (!s->new_location)
854		✗	return AVERROR(ENOMEM);
855		✗	return 0;
856			}
857
858			/* "bytes $from-$to/$document_size" */
859		✗	static void parse_content_range(URLContext *h, const char *p)
860			{
861		✗	HTTPContext *s = h->priv_data;
862			const char *slash;
863
864		✗	if (!strncmp(p, "bytes ", 6)) {
865		✗	p += 6;
866		✗	s->off = strtoull(p, NULL, 10);
867		✗	if ((slash = strchr(p, '/')) && strlen(slash) > 0)
868		✗	s->filesize_from_content_range = strtoull(slash + 1, NULL, 10);
869			}
870		✗	if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
871		✗	h->is_streamed = 0; /* we _can_ in fact seek */
872		✗	}
873
874		✗	static int parse_content_encoding(URLContext *h, const char *p)
875			{
876		✗	if (!av_strncasecmp(p, "gzip", 4) ||
877		✗	!av_strncasecmp(p, "deflate", 7)) {
878			#if CONFIG_ZLIB
879		✗	HTTPContext *s = h->priv_data;
880
881		✗	s->compressed = 1;
882		✗	inflateEnd(&s->inflate_stream);
883		✗	if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
884		✗	av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
885			s->inflate_stream.msg);
886		✗	return AVERROR(ENOSYS);
887			}
888		✗	if (zlibCompileFlags() & (1 << 17)) {
889		✗	av_log(h, AV_LOG_WARNING,
890			"Your zlib was compiled without gzip support.\n");
891		✗	return AVERROR(ENOSYS);
892			}
893			#else
894			av_log(h, AV_LOG_WARNING,
895			"Compressed (%s) content, need zlib with gzip support\n", p);
896			return AVERROR(ENOSYS);
897			#endif /* CONFIG_ZLIB */
898		✗	} else if (!av_strncasecmp(p, "identity", 8)) {
899			// The normal, no-encoding case (although servers shouldn't include
900			// the header at all if this is the case).
901			} else {
902		✗	av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
903			}
904		✗	return 0;
905			}
906
907			// Concat all Icy- header lines
908		✗	static int parse_icy(HTTPContext *s, const char *tag, const char *p)
909			{
910		✗	int len = 4 + strlen(p) + strlen(tag);
911		✗	int is_first = !s->icy_metadata_headers;
912			int ret;
913
914		✗	av_dict_set(&s->metadata, tag, p, 0);
915
916		✗	if (s->icy_metadata_headers)
917		✗	len += strlen(s->icy_metadata_headers);
918
919		✗	if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
920		✗	return ret;
921
922		✗	if (is_first)
923		✗	*s->icy_metadata_headers = '\0';
924
925		✗	av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
926
927		✗	return 0;
928			}
929
930		✗	static int parse_http_date(const char *date_str, struct tm *buf)
931			{
932			char date_buf[MAX_DATE_LEN];
933		✗	int i, j, date_buf_len = MAX_DATE_LEN-1;
934			char *date;
935
936			// strip off any punctuation or whitespace
937		✗	for (i = 0, j = 0; date_str[i] != '\0' && j < date_buf_len; i++) {
938		✗	if ((date_str[i] >= '0' && date_str[i] <= '9') ||
939		✗	(date_str[i] >= 'A' && date_str[i] <= 'Z') ||
940		✗	(date_str[i] >= 'a' && date_str[i] <= 'z')) {
941		✗	date_buf[j] = date_str[i];
942		✗	j++;
943			}
944			}
945		✗	date_buf[j] = '\0';
946		✗	date = date_buf;
947
948			// move the string beyond the day of week
949		✗	while ((*date < '0' || *date > '9') && *date != '\0')
950		✗	date++;
951
952		✗	return av_small_strptime(date, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
953			}
954
955		✗	static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
956			{
957			char *param, *next_param, *cstr, *back;
958		✗	char *saveptr = NULL;
959
960		✗	if (!set_cookie[0])
961		✗	return 0;
962
963		✗	if (!(cstr = av_strdup(set_cookie)))
964		✗	return AVERROR(EINVAL);
965
966			// strip any trailing whitespace
967		✗	back = &cstr[strlen(cstr)-1];
968		✗	while (strchr(WHITESPACES, *back)) {
969		✗	*back='\0';
970		✗	if (back == cstr)
971		✗	break;
972		✗	back--;
973			}
974
975		✗	next_param = cstr;
976		✗	while ((param = av_strtok(next_param, ";", &saveptr))) {
977			char *name, *value;
978		✗	next_param = NULL;
979		✗	param += strspn(param, WHITESPACES);
980		✗	if ((name = av_strtok(param, "=", &value))) {
981		✗	if (av_dict_set(dict, name, value, 0) < 0) {
982		✗	av_free(cstr);
983		✗	return -1;
984			}
985			}
986			}
987
988		✗	av_free(cstr);
989		✗	return 0;
990			}
991
992		✗	static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
993			{
994		✗	AVDictionary *new_params = NULL;
995			const AVDictionaryEntry *e, *cookie_entry;
996			char *eql, *name;
997
998			// ensure the cookie is parsable
999		✗	if (parse_set_cookie(p, &new_params))
1000		✗	return -1;
1001
1002			// if there is no cookie value there is nothing to parse
1003		✗	cookie_entry = av_dict_iterate(new_params, NULL);
1004		✗	if (!cookie_entry || !cookie_entry->value) {
1005		✗	av_dict_free(&new_params);
1006		✗	return -1;
1007			}
1008
1009			// ensure the cookie is not expired or older than an existing value
1010		✗	if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
1011		✗	struct tm new_tm = {0};
1012		✗	if (!parse_http_date(e->value, &new_tm)) {
1013			AVDictionaryEntry *e2;
1014
1015			// if the cookie has already expired ignore it
1016		✗	if (av_timegm(&new_tm) < av_gettime() / 1000000) {
1017		✗	av_dict_free(&new_params);
1018		✗	return 0;
1019			}
1020
1021			// only replace an older cookie with the same name
1022		✗	e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
1023		✗	if (e2 && e2->value) {
1024		✗	AVDictionary *old_params = NULL;
1025		✗	if (!parse_set_cookie(p, &old_params)) {
1026		✗	e2 = av_dict_get(old_params, "expires", NULL, 0);
1027		✗	if (e2 && e2->value) {
1028		✗	struct tm old_tm = {0};
1029		✗	if (!parse_http_date(e->value, &old_tm)) {
1030		✗	if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
1031		✗	av_dict_free(&new_params);
1032		✗	av_dict_free(&old_params);
1033		✗	return -1;
1034			}
1035			}
1036			}
1037			}
1038		✗	av_dict_free(&old_params);
1039			}
1040			}
1041			}
1042		✗	av_dict_free(&new_params);
1043
1044			// duplicate the cookie name (dict will dupe the value)
1045		✗	if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
1046		✗	if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
1047
1048			// add the cookie to the dictionary
1049		✗	av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
1050
1051		✗	return 0;
1052			}
1053
1054		✗	static int cookie_string(AVDictionary *dict, char **cookies)
1055			{
1056		✗	const AVDictionaryEntry *e = NULL;
1057		✗	int len = 1;
1058
1059			// determine how much memory is needed for the cookies string
1060		✗	while ((e = av_dict_iterate(dict, e)))
1061		✗	len += strlen(e->key) + strlen(e->value) + 1;
1062
1063			// reallocate the cookies
1064		✗	e = NULL;
1065		✗	if (*cookies) av_free(*cookies);
1066		✗	*cookies = av_malloc(len);
1067		✗	if (!*cookies) return AVERROR(ENOMEM);
1068		✗	*cookies[0] = '\0';
1069
1070			// write out the cookies
1071		✗	while ((e = av_dict_iterate(dict, e)))
1072		✗	av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
1073
1074		✗	return 0;
1075			}
1076
1077		✗	static void parse_expires(HTTPContext *s, const char *p)
1078			{
1079			struct tm tm;
1080
1081		✗	if (!parse_http_date(p, &tm)) {
1082		✗	s->expires = av_timegm(&tm);
1083			}
1084		✗	}
1085
1086		✗	static void parse_cache_control(HTTPContext *s, const char *p)
1087			{
1088			char *age;
1089			int offset;
1090
1091			/* give 'Expires' higher priority over 'Cache-Control' */
1092		✗	if (s->expires) {
1093		✗	return;
1094			}
1095
1096		✗	if (av_stristr(p, "no-cache") || av_stristr(p, "no-store")) {
1097		✗	s->expires = -1;
1098		✗	return;
1099			}
1100
1101		✗	age = av_stristr(p, "s-maxage=");
1102		✗	offset = 9;
1103		✗	if (!age) {
1104		✗	age = av_stristr(p, "max-age=");
1105		✗	offset = 8;
1106			}
1107
1108		✗	if (age) {
1109		✗	s->expires = time(NULL) + atoi(p + offset);
1110			}
1111			}
1112
1113		✗	static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
1114			{
1115		✗	HTTPContext *s = h->priv_data;
1116		✗	const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
1117			char *tag, *p, *end, *method, *resource, *version;
1118			int ret;
1119
1120			/* end of header */
1121		✗	if (line[0] == '\0') {
1122		✗	s->end_header = 1;
1123		✗	return 0;
1124			}
1125
1126		✗	p = line;
1127		✗	if (line_count == 0) {
1128		✗	if (s->is_connected_server) {
1129			// HTTP method
1130		✗	method = p;
1131		✗	while (*p && !av_isspace(*p))
1132		✗	p++;
1133		✗	*(p++) = '\0';
1134		✗	av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
1135		✗	if (s->method) {
1136		✗	if (av_strcasecmp(s->method, method)) {
1137		✗	av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
1138			s->method, method);
1139		✗	return ff_http_averror(400, AVERROR(EIO));
1140			}
1141			} else {
1142			// use autodetected HTTP method to expect
1143		✗	av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1144		✗	if (av_strcasecmp(auto_method, method)) {
1145		✗	av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1146			"(%s autodetected %s received)\n", auto_method, method);
1147		✗	return ff_http_averror(400, AVERROR(EIO));
1148			}
1149		✗	if (!(s->method = av_strdup(method)))
1150		✗	return AVERROR(ENOMEM);
1151			}
1152
1153			// HTTP resource
1154		✗	while (av_isspace(*p))
1155		✗	p++;
1156		✗	resource = p;
1157		✗	while (*p && !av_isspace(*p))
1158		✗	p++;
1159		✗	*(p++) = '\0';
1160		✗	av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1161		✗	if (!(s->resource = av_strdup(resource)))
1162		✗	return AVERROR(ENOMEM);
1163
1164			// HTTP version
1165		✗	while (av_isspace(*p))
1166		✗	p++;
1167		✗	version = p;
1168		✗	while (*p && !av_isspace(*p))
1169		✗	p++;
1170		✗	*p = '\0';
1171		✗	if (av_strncasecmp(version, "HTTP/", 5)) {
1172		✗	av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1173		✗	return ff_http_averror(400, AVERROR(EIO));
1174			}
1175		✗	av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1176			} else {
1177		✗	if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1178		✗	s->willclose = 1;
1179		✗	while (*p != '/' && *p != '\0')
1180		✗	p++;
1181		✗	while (*p == '/')
1182		✗	p++;
1183		✗	av_freep(&s->http_version);
1184		✗	s->http_version = av_strndup(p, 3);
1185		✗	while (!av_isspace(*p) && *p != '\0')
1186		✗	p++;
1187		✗	while (av_isspace(*p))
1188		✗	p++;
1189		✗	s->http_code = strtol(p, &end, 10);
1190
1191		✗	av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1192
1193		✗	*parsed_http_code = 1;
1194
1195		✗	if ((ret = check_http_code(h, s->http_code, end)) < 0)
1196		✗	return ret;
1197			}
1198			} else {
1199		✗	while (*p != '\0' && *p != ':')
1200		✗	p++;
1201		✗	if (*p != ':')
1202		✗	return 1;
1203
1204		✗	*p = '\0';
1205		✗	tag = line;
1206		✗	p++;
1207		✗	while (av_isspace(*p))
1208		✗	p++;
1209		✗	if (!av_strcasecmp(tag, "Location")) {
1210		✗	if ((ret = parse_location(s, p)) < 0)
1211		✗	return ret;
1212		✗	} else if (!av_strcasecmp(tag, "Content-Length") &&
1213		✗	s->filesize == UINT64_MAX) {
1214		✗	s->filesize = strtoull(p, NULL, 10);
1215		✗	} else if (!av_strcasecmp(tag, "Content-Range")) {
1216		✗	parse_content_range(h, p);
1217		✗	} else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1218		✗	!strncmp(p, "bytes", 5) &&
1219		✗	s->seekable == -1) {
1220		✗	h->is_streamed = 0;
1221		✗	} else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1222		✗	!av_strncasecmp(p, "chunked", 7)) {
1223		✗	s->filesize = UINT64_MAX;
1224		✗	s->chunksize = 0;
1225		✗	} else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1226		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1227		✗	} else if (!av_strcasecmp(tag, "Authentication-Info")) {
1228		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1229		✗	} else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1230		✗	ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1231		✗	} else if (!av_strcasecmp(tag, "Connection")) {
1232		✗	if (!strcmp(p, "close"))
1233		✗	s->willclose = 1;
1234		✗	} else if (!av_strcasecmp(tag, "Server")) {
1235		✗	if (!av_strcasecmp(p, "AkamaiGHost")) {
1236		✗	s->is_akamai = 1;
1237		✗	} else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1238		✗	s->is_mediagateway = 1;
1239			}
1240		✗	} else if (!av_strcasecmp(tag, "Content-Type")) {
1241		✗	av_free(s->mime_type);
1242		✗	s->mime_type = av_get_token((const char **)&p, ";");
1243		✗	} else if (!av_strcasecmp(tag, "Set-Cookie")) {
1244		✗	if (parse_cookie(s, p, &s->cookie_dict))
1245		✗	av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1246		✗	} else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1247		✗	s->icy_metaint = strtoull(p, NULL, 10);
1248		✗	} else if (!av_strncasecmp(tag, "Icy-", 4)) {
1249		✗	if ((ret = parse_icy(s, tag, p)) < 0)
1250		✗	return ret;
1251		✗	} else if (!av_strcasecmp(tag, "Content-Encoding")) {
1252		✗	if ((ret = parse_content_encoding(h, p)) < 0)
1253		✗	return ret;
1254		✗	} else if (!av_strcasecmp(tag, "Expires")) {
1255		✗	parse_expires(s, p);
1256		✗	} else if (!av_strcasecmp(tag, "Cache-Control")) {
1257		✗	parse_cache_control(s, p);
1258		✗	} else if (!av_strcasecmp(tag, "Retry-After")) {
1259			/* The header can be either an integer that represents seconds, or a date. */
1260			struct tm tm;
1261		✗	int date_ret = parse_http_date(p, &tm);
1262		✗	if (!date_ret) {
1263		✗	time_t retry = av_timegm(&tm);
1264		✗	int64_t now = av_gettime() / 1000000;
1265		✗	int64_t diff = ((int64_t) retry) - now;
1266		✗	s->retry_after = (unsigned int) FFMAX(0, diff);
1267			} else {
1268		✗	s->retry_after = strtoul(p, NULL, 10);
1269			}
1270			}
1271			}
1272		✗	return 1;
1273			}
1274
1275			/**
1276			* Create a string containing cookie values for use as a HTTP cookie header
1277			* field value for a particular path and domain from the cookie values stored in
1278			* the HTTP protocol context. The cookie string is stored in *cookies, and may
1279			* be NULL if there are no valid cookies.
1280			*
1281			* @return a negative value if an error condition occurred, 0 otherwise
1282			*/
1283		✗	static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1284			const char *domain)
1285			{
1286			// cookie strings will look like Set-Cookie header field values. Multiple
1287			// Set-Cookie fields will result in multiple values delimited by a newline
1288		✗	int ret = 0;
1289			char *cookie, *set_cookies, *next;
1290		✗	char *saveptr = NULL;
1291
1292			// destroy any cookies in the dictionary.
1293		✗	av_dict_free(&s->cookie_dict);
1294
1295		✗	if (!s->cookies)
1296		✗	return 0;
1297
1298		✗	next = set_cookies = av_strdup(s->cookies);
1299		✗	if (!next)
1300		✗	return AVERROR(ENOMEM);
1301
1302		✗	*cookies = NULL;
1303		✗	while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1304		✗	AVDictionary *cookie_params = NULL;
1305			const AVDictionaryEntry *cookie_entry, *e;
1306
1307		✗	next = NULL;
1308			// store the cookie in a dict in case it is updated in the response
1309		✗	if (parse_cookie(s, cookie, &s->cookie_dict))
1310		✗	av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1311
1312			// continue on to the next cookie if this one cannot be parsed
1313		✗	if (parse_set_cookie(cookie, &cookie_params))
1314		✗	goto skip_cookie;
1315
1316			// if the cookie has no value, skip it
1317		✗	cookie_entry = av_dict_iterate(cookie_params, NULL);
1318		✗	if (!cookie_entry || !cookie_entry->value)
1319		✗	goto skip_cookie;
1320
1321			// if the cookie has expired, don't add it
1322		✗	if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1323		✗	struct tm tm_buf = {0};
1324		✗	if (!parse_http_date(e->value, &tm_buf)) {
1325		✗	if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1326		✗	goto skip_cookie;
1327			}
1328			}
1329
1330			// if no domain in the cookie assume it appied to this request
1331		✗	if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1332			// find the offset comparison is on the min domain (b.com, not a.b.com)
1333		✗	int domain_offset = strlen(domain) - strlen(e->value);
1334		✗	if (domain_offset < 0)
1335		✗	goto skip_cookie;
1336
1337			// match the cookie domain
1338		✗	if (av_strcasecmp(&domain[domain_offset], e->value))
1339		✗	goto skip_cookie;
1340			}
1341
1342			// if a cookie path is provided, ensure the request path is within that path
1343		✗	e = av_dict_get(cookie_params, "path", NULL, 0);
1344		✗	if (e && av_strncasecmp(path, e->value, strlen(e->value)))
1345		✗	goto skip_cookie;
1346
1347			// cookie parameters match, so copy the value
1348		✗	if (!*cookies) {
1349		✗	*cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1350			} else {
1351		✗	char *tmp = *cookies;
1352		✗	*cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1353		✗	av_free(tmp);
1354			}
1355		✗	if (!*cookies)
1356		✗	ret = AVERROR(ENOMEM);
1357
1358		✗	skip_cookie:
1359		✗	av_dict_free(&cookie_params);
1360			}
1361
1362		✗	av_free(set_cookies);
1363
1364		✗	return ret;
1365			}
1366
1367		✗	static inline int has_header(const char *str, const char *header)
1368			{
1369			/* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1370		✗	if (!str)
1371		✗	return 0;
1372		✗	return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1373			}
1374
1375		✗	static int http_read_header(URLContext *h)
1376			{
1377		✗	HTTPContext *s = h->priv_data;
1378			char line[MAX_URL_SIZE];
1379		✗	int err = 0, http_err = 0;
1380
1381		✗	av_freep(&s->new_location);
1382		✗	s->expires = 0;
1383		✗	s->chunksize = UINT64_MAX;
1384		✗	s->filesize_from_content_range = UINT64_MAX;
1385
1386		✗	for (;;) {
1387		✗	int parsed_http_code = 0;
1388
1389		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1390		✗	return err;
1391
1392		✗	av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1393
1394		✗	err = process_line(h, line, s->line_count, &parsed_http_code);
1395		✗	if (err < 0) {
1396		✗	if (parsed_http_code) {
1397		✗	http_err = err;
1398			} else {
1399			/* Prefer to return HTTP code error if we've already seen one. */
1400		✗	if (http_err)
1401		✗	return http_err;
1402			else
1403		✗	return err;
1404			}
1405			}
1406		✗	if (err == 0)
1407		✗	break;
1408		✗	s->line_count++;
1409			}
1410		✗	if (http_err)
1411		✗	return http_err;
1412
1413			// filesize from Content-Range can always be used, even if using chunked Transfer-Encoding
1414		✗	if (s->filesize_from_content_range != UINT64_MAX)
1415		✗	s->filesize = s->filesize_from_content_range;
1416
1417		✗	if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1418		✗	h->is_streamed = 1; /* we can in fact _not_ seek */
1419
1420			// add any new cookies into the existing cookie string
1421		✗	cookie_string(s->cookie_dict, &s->cookies);
1422		✗	av_dict_free(&s->cookie_dict);
1423
1424		✗	return err;
1425			}
1426
1427			/**
1428			* Escape unsafe characters in path in order to pass them safely to the HTTP
1429			* request. Insipred by the algorithm in GNU wget:
1430			* - escape "%" characters not followed by two hex digits
1431			* - escape all "unsafe" characters except which are also "reserved"
1432			* - pass through everything else
1433			*/
1434		✗	static void bprint_escaped_path(AVBPrint *bp, const char *path)
1435			{
1436			#define NEEDS_ESCAPE(ch) \
1437			((ch) <= ' ' || (ch) >= '\x7f' || \
1438			(ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1439			(ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1440		✗	while (*path) {
1441			char buf[1024];
1442		✗	char *q = buf;
1443		✗	while (*path && q - buf < sizeof(buf) - 4) {
1444		✗	if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1445		✗	*q++ = *path++;
1446		✗	*q++ = *path++;
1447		✗	*q++ = *path++;
1448		✗	} else if (NEEDS_ESCAPE(*path)) {
1449		✗	q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1450			} else {
1451		✗	*q++ = *path++;
1452			}
1453			}
1454		✗	av_bprint_append_data(bp, buf, q - buf);
1455			}
1456		✗	}
1457
1458		✗	static int http_connect(URLContext *h, const char *path, const char *local_path,
1459			const char *hoststr, const char *auth,
1460			const char *proxyauth)
1461			{
1462		✗	HTTPContext *s = h->priv_data;
1463			int post, err;
1464			AVBPrint request;
1465		✗	char *authstr = NULL, *proxyauthstr = NULL;
1466		✗	uint64_t off = s->off;
1467			const char *method;
1468		✗	int send_expect_100 = 0;
1469
1470		✗	av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1471
1472			/* send http header */
1473		✗	post = h->flags & AVIO_FLAG_WRITE;
1474
1475		✗	if (s->post_data) {
1476			/* force POST method and disable chunked encoding when
1477			* custom HTTP post data is set */
1478		✗	post = 1;
1479		✗	s->chunked_post = 0;
1480			}
1481
1482		✗	if (s->method)
1483		✗	method = s->method;
1484			else
1485		✗	method = post ? "POST" : "GET";
1486
1487		✗	authstr = ff_http_auth_create_response(&s->auth_state, auth,
1488			local_path, method);
1489		✗	proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1490			local_path, method);
1491
1492		✗	if (post && !s->post_data) {
1493		✗	if (s->send_expect_100 != -1) {
1494		✗	send_expect_100 = s->send_expect_100;
1495			} else {
1496		✗	send_expect_100 = 0;
1497			/* The user has supplied authentication but we don't know the auth type,
1498			* send Expect: 100-continue to get the 401 response including the
1499			* WWW-Authenticate header, or an 100 continue if no auth actually
1500			* is needed. */
1501		✗	if (auth && *auth &&
1502		✗	s->auth_state.auth_type == HTTP_AUTH_NONE &&
1503		✗	s->http_code != 401)
1504		✗	send_expect_100 = 1;
1505			}
1506			}
1507
1508		✗	av_bprintf(&request, "%s ", method);
1509		✗	bprint_escaped_path(&request, path);
1510		✗	av_bprintf(&request, " HTTP/1.1\r\n");
1511
1512		✗	if (post && s->chunked_post)
1513		✗	av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1514			/* set default headers if needed */
1515		✗	if (!has_header(s->headers, "\r\nUser-Agent: "))
1516		✗	av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1517		✗	if (s->referer) {
1518			/* set default headers if needed */
1519		✗	if (!has_header(s->headers, "\r\nReferer: "))
1520		✗	av_bprintf(&request, "Referer: %s\r\n", s->referer);
1521			}
1522		✗	if (!has_header(s->headers, "\r\nAccept: "))
1523		✗	av_bprintf(&request, "Accept: */*\r\n");
1524			// Note: we send the Range header on purpose, even when we're probing,
1525			// since it allows us to detect more reliably if a (non-conforming)
1526			// server supports seeking by analysing the reply headers.
1527		✗	if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable != 0)) {
1528		✗	av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1529		✗	if (s->end_off)
1530		✗	av_bprintf(&request, "%"PRId64, s->end_off - 1);
1531		✗	av_bprintf(&request, "\r\n");
1532			}
1533		✗	if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1534		✗	av_bprintf(&request, "Expect: 100-continue\r\n");
1535
1536		✗	if (!has_header(s->headers, "\r\nConnection: "))
1537		✗	av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1538
1539		✗	if (!has_header(s->headers, "\r\nHost: "))
1540		✗	av_bprintf(&request, "Host: %s\r\n", hoststr);
1541		✗	if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1542		✗	av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1543
1544		✗	if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1545		✗	av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1546		✗	if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1547		✗	char *cookies = NULL;
1548		✗	if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1549		✗	av_bprintf(&request, "Cookie: %s\r\n", cookies);
1550		✗	av_free(cookies);
1551			}
1552			}
1553		✗	if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1554		✗	av_bprintf(&request, "Icy-MetaData: 1\r\n");
1555
1556			/* now add in custom headers */
1557		✗	if (s->headers)
1558		✗	av_bprintf(&request, "%s", s->headers);
1559
1560		✗	if (authstr)
1561		✗	av_bprintf(&request, "%s", authstr);
1562		✗	if (proxyauthstr)
1563		✗	av_bprintf(&request, "Proxy-%s", proxyauthstr);
1564		✗	av_bprintf(&request, "\r\n");
1565
1566		✗	av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1567
1568		✗	if (!av_bprint_is_complete(&request)) {
1569		✗	av_log(h, AV_LOG_ERROR, "overlong headers\n");
1570		✗	err = AVERROR(EINVAL);
1571		✗	goto done;
1572			}
1573
1574		✗	if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1575		✗	goto done;
1576
1577		✗	if (s->post_data)
1578		✗	if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1579		✗	goto done;
1580
1581			/* init input buffer */
1582		✗	s->buf_ptr = s->buffer;
1583		✗	s->buf_end = s->buffer;
1584		✗	s->line_count = 0;
1585		✗	s->off = 0;
1586		✗	s->icy_data_read = 0;
1587		✗	s->filesize = UINT64_MAX;
1588		✗	s->willclose = 0;
1589		✗	s->end_chunked_post = 0;
1590		✗	s->end_header = 0;
1591			#if CONFIG_ZLIB
1592		✗	s->compressed = 0;
1593			#endif
1594		✗	if (post && !s->post_data && !send_expect_100) {
1595			/* Pretend that it did work. We didn't read any header yet, since
1596			* we've still to send the POST data, but the code calling this
1597			* function will check http_code after we return. */
1598		✗	s->http_code = 200;
1599		✗	err = 0;
1600		✗	goto done;
1601			}
1602
1603			/* wait for header */
1604		✗	err = http_read_header(h);
1605		✗	if (err < 0)
1606		✗	goto done;
1607
1608		✗	if (s->new_location)
1609		✗	s->off = off;
1610
1611		✗	err = (off == s->off) ? 0 : -1;
1612		✗	done:
1613		✗	av_freep(&authstr);
1614		✗	av_freep(&proxyauthstr);
1615		✗	return err;
1616			}
1617
1618		✗	static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1619			{
1620		✗	HTTPContext *s = h->priv_data;
1621			int len;
1622
1623		✗	if (s->chunksize != UINT64_MAX) {
1624		✗	if (s->chunkend) {
1625		✗	return AVERROR_EOF;
1626			}
1627		✗	if (!s->chunksize) {
1628			char line[32];
1629			int err;
1630
1631			do {
1632		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1633		✗	return err;
1634		✗	} while (!*line); /* skip CR LF from last chunk */
1635
1636		✗	s->chunksize = strtoull(line, NULL, 16);
1637
1638		✗	av_log(h, AV_LOG_TRACE,
1639			"Chunked encoding data size: %"PRIu64"\n",
1640			s->chunksize);
1641
1642		✗	if (!s->chunksize && s->multiple_requests) {
1643		✗	http_get_line(s, line, sizeof(line)); // read empty chunk
1644		✗	s->chunkend = 1;
1645		✗	return 0;
1646			}
1647		✗	else if (!s->chunksize) {
1648		✗	av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1649		✗	ffurl_closep(&s->hd);
1650		✗	return 0;
1651			}
1652		✗	else if (s->chunksize == UINT64_MAX) {
1653		✗	av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1654			s->chunksize);
1655		✗	return AVERROR(EINVAL);
1656			}
1657			}
1658		✗	size = FFMIN(size, s->chunksize);
1659			}
1660
1661			/* read bytes from input buffer first */
1662		✗	len = s->buf_end - s->buf_ptr;
1663		✗	if (len > 0) {
1664		✗	if (len > size)
1665		✗	len = size;
1666		✗	memcpy(buf, s->buf_ptr, len);
1667		✗	s->buf_ptr += len;
1668			} else {
1669		✗	uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1670		✗	if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1671		✗	return AVERROR_EOF;
1672		✗	len = ffurl_read(s->hd, buf, size);
1673		✗	if ((!len || len == AVERROR_EOF) &&
1674		✗	(!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1675		✗	av_log(h, AV_LOG_ERROR,
1676			"Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1677			s->off, target_end
1678			);
1679		✗	return AVERROR(EIO);
1680			}
1681			}
1682		✗	if (len > 0) {
1683		✗	s->off += len;
1684		✗	if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1685		✗	av_assert0(s->chunksize >= len);
1686		✗	s->chunksize -= len;
1687			}
1688			}
1689		✗	return len;
1690			}
1691
1692			#if CONFIG_ZLIB
1693			#define DECOMPRESS_BUF_SIZE (256 * 1024)
1694		✗	static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1695			{
1696		✗	HTTPContext *s = h->priv_data;
1697			int ret;
1698
1699		✗	if (!s->inflate_buffer) {
1700		✗	s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1701		✗	if (!s->inflate_buffer)
1702		✗	return AVERROR(ENOMEM);
1703			}
1704
1705		✗	if (s->inflate_stream.avail_in == 0) {
1706		✗	int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1707		✗	if (read <= 0)
1708		✗	return read;
1709		✗	s->inflate_stream.next_in = s->inflate_buffer;
1710		✗	s->inflate_stream.avail_in = read;
1711			}
1712
1713		✗	s->inflate_stream.avail_out = size;
1714		✗	s->inflate_stream.next_out = buf;
1715
1716		✗	ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1717		✗	if (ret != Z_OK && ret != Z_STREAM_END)
1718		✗	av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1719			ret, s->inflate_stream.msg);
1720
1721		✗	return size - s->inflate_stream.avail_out;
1722			}
1723			#endif /* CONFIG_ZLIB */
1724
1725			static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1726
1727		✗	static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1728			{
1729		✗	HTTPContext *s = h->priv_data;
1730			int err, read_ret;
1731			int64_t seek_ret;
1732		✗	int reconnect_delay = 0;
1733		✗	int reconnect_delay_total = 0;
1734		✗	int conn_attempts = 1;
1735
1736		✗	if (!s->hd)
1737		✗	return AVERROR_EOF;
1738
1739		✗	if (s->end_chunked_post && !s->end_header) {
1740		✗	err = http_read_header(h);
1741		✗	if (err < 0)
1742		✗	return err;
1743			}
1744
1745			#if CONFIG_ZLIB
1746		✗	if (s->compressed)
1747		✗	return http_buf_read_compressed(h, buf, size);
1748			#endif /* CONFIG_ZLIB */
1749		✗	read_ret = http_buf_read(h, buf, size);
1750		✗	while (read_ret < 0) {
1751		✗	uint64_t target = h->is_streamed ? 0 : s->off;
1752		✗	bool is_premature = s->filesize > 0 && s->off < s->filesize;
1753
1754		✗	if (read_ret == AVERROR_EXIT)
1755		✗	break;
1756
1757		✗	if (h->is_streamed && !s->reconnect_streamed)
1758		✗	break;
1759
1760		✗	if (!(s->reconnect && is_premature) &&
1761		✗	!(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
1762		✗	if (is_premature)
1763		✗	return AVERROR(EIO);
1764			else
1765		✗	break;
1766			}
1767
1768		✗	if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
1769		✗	reconnect_delay_total > s->reconnect_delay_total_max)
1770		✗	return AVERROR(EIO);
1771
1772		✗	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));
1773		✗	err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1774		✗	if (err != AVERROR(ETIMEDOUT))
1775		✗	return err;
1776		✗	reconnect_delay_total += reconnect_delay;
1777		✗	reconnect_delay = 1 + 2*reconnect_delay;
1778		✗	conn_attempts++;
1779		✗	seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1780		✗	if (seek_ret >= 0 && seek_ret != target) {
1781		✗	av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1782		✗	return read_ret;
1783			}
1784
1785		✗	read_ret = http_buf_read(h, buf, size);
1786			}
1787
1788		✗	return read_ret;
1789			}
1790
1791			// Like http_read_stream(), but no short reads.
1792			// Assumes partial reads are an error.
1793		✗	static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1794			{
1795		✗	int pos = 0;
1796		✗	while (pos < size) {
1797		✗	int len = http_read_stream(h, buf + pos, size - pos);
1798		✗	if (len < 0)
1799		✗	return len;
1800		✗	pos += len;
1801			}
1802		✗	return pos;
1803			}
1804
1805		✗	static void update_metadata(URLContext *h, char *data)
1806			{
1807			char *key;
1808			char *val;
1809			char *end;
1810		✗	char *next = data;
1811		✗	HTTPContext *s = h->priv_data;
1812
1813		✗	while (*next) {
1814		✗	key = next;
1815		✗	val = strstr(key, "='");
1816		✗	if (!val)
1817		✗	break;
1818		✗	end = strstr(val, "';");
1819		✗	if (!end)
1820		✗	break;
1821
1822		✗	*val = '\0';
1823		✗	*end = '\0';
1824		✗	val += 2;
1825
1826		✗	av_dict_set(&s->metadata, key, val, 0);
1827		✗	av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1828
1829		✗	next = end + 2;
1830			}
1831		✗	}
1832
1833		✗	static int store_icy(URLContext *h, int size)
1834			{
1835		✗	HTTPContext *s = h->priv_data;
1836			/* until next metadata packet */
1837			uint64_t remaining;
1838
1839		✗	if (s->icy_metaint < s->icy_data_read)
1840		✗	return AVERROR_INVALIDDATA;
1841		✗	remaining = s->icy_metaint - s->icy_data_read;
1842
1843		✗	if (!remaining) {
1844			/* The metadata packet is variable sized. It has a 1 byte header
1845			* which sets the length of the packet (divided by 16). If it's 0,
1846			* the metadata doesn't change. After the packet, icy_metaint bytes
1847			* of normal data follows. */
1848			uint8_t ch;
1849		✗	int len = http_read_stream_all(h, &ch, 1);
1850		✗	if (len < 0)
1851		✗	return len;
1852		✗	if (ch > 0) {
1853			char data[255 * 16 + 1];
1854			int ret;
1855		✗	len = ch * 16;
1856		✗	ret = http_read_stream_all(h, data, len);
1857		✗	if (ret < 0)
1858		✗	return ret;
1859		✗	data[len + 1] = 0;
1860		✗	if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1861		✗	return ret;
1862		✗	update_metadata(h, data);
1863			}
1864		✗	s->icy_data_read = 0;
1865		✗	remaining = s->icy_metaint;
1866			}
1867
1868		✗	return FFMIN(size, remaining);
1869			}
1870
1871		✗	static int http_read(URLContext *h, uint8_t *buf, int size)
1872			{
1873		✗	HTTPContext *s = h->priv_data;
1874
1875		✗	if (s->icy_metaint > 0) {
1876		✗	size = store_icy(h, size);
1877		✗	if (size < 0)
1878		✗	return size;
1879			}
1880
1881		✗	size = http_read_stream(h, buf, size);
1882		✗	if (size > 0)
1883		✗	s->icy_data_read += size;
1884		✗	return size;
1885			}
1886
1887			/* used only when posting data */
1888		✗	static int http_write(URLContext *h, const uint8_t *buf, int size)
1889			{
1890		✗	char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1891			int ret;
1892		✗	char crlf[] = "\r\n";
1893		✗	HTTPContext *s = h->priv_data;
1894
1895		✗	if (!s->chunked_post) {
1896			/* non-chunked data is sent without any special encoding */
1897		✗	return ffurl_write(s->hd, buf, size);
1898			}
1899
1900			/* silently ignore zero-size data since chunk encoding that would
1901			* signal EOF */
1902		✗	if (size > 0) {
1903			/* upload data using chunked encoding */
1904		✗	snprintf(temp, sizeof(temp), "%x\r\n", size);
1905
1906		✗	if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1907		✗	(ret = ffurl_write(s->hd, buf, size)) < 0 ||
1908		✗	(ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1909		✗	return ret;
1910			}
1911		✗	return size;
1912			}
1913
1914		✗	static int http_shutdown(URLContext *h, int flags)
1915			{
1916		✗	int ret = 0;
1917		✗	char footer[] = "0\r\n\r\n";
1918		✗	HTTPContext *s = h->priv_data;
1919
1920			/* signal end of chunked encoding if used */
1921		✗	if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1922		✗	((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1923		✗	ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1924		✗	ret = ret > 0 ? 0 : ret;
1925			/* flush the receive buffer when it is write only mode */
1926		✗	if (!(flags & AVIO_FLAG_READ)) {
1927			char buf[1024];
1928			int read_ret;
1929		✗	s->hd->flags |= AVIO_FLAG_NONBLOCK;
1930		✗	read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1931		✗	s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1932		✗	if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1933		✗	av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1934		✗	ret = read_ret;
1935			}
1936			}
1937		✗	s->end_chunked_post = 1;
1938			}
1939
1940		✗	return ret;
1941			}
1942
1943		✗	static int http_close(URLContext *h)
1944			{
1945		✗	int ret = 0;
1946		✗	HTTPContext *s = h->priv_data;
1947
1948			#if CONFIG_ZLIB
1949		✗	inflateEnd(&s->inflate_stream);
1950		✗	av_freep(&s->inflate_buffer);
1951			#endif /* CONFIG_ZLIB */
1952
1953		✗	if (s->hd && !s->end_chunked_post)
1954			/* Close the write direction by sending the end of chunked encoding. */
1955		✗	ret = http_shutdown(h, h->flags);
1956
1957		✗	if (s->hd)
1958		✗	ffurl_closep(&s->hd);
1959		✗	av_dict_free(&s->chained_options);
1960		✗	av_dict_free(&s->cookie_dict);
1961		✗	av_dict_free(&s->redirect_cache);
1962		✗	av_freep(&s->new_location);
1963		✗	av_freep(&s->uri);
1964		✗	return ret;
1965			}
1966
1967		✗	static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1968			{
1969		✗	HTTPContext *s = h->priv_data;
1970		✗	URLContext *old_hd = s->hd;
1971		✗	uint64_t old_off = s->off;
1972			uint8_t old_buf[BUFFER_SIZE];
1973			int old_buf_size, ret;
1974		✗	AVDictionary *options = NULL;
1975
1976		✗	if (whence == AVSEEK_SIZE)
1977		✗	return s->filesize;
1978		✗	else if (!force_reconnect &&
1979		✗	((whence == SEEK_CUR && off == 0) ||
1980		✗	(whence == SEEK_SET && off == s->off)))
1981		✗	return s->off;
1982		✗	else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1983		✗	return AVERROR(ENOSYS);
1984
1985		✗	if (whence == SEEK_CUR)
1986		✗	off += s->off;
1987		✗	else if (whence == SEEK_END)
1988		✗	off += s->filesize;
1989		✗	else if (whence != SEEK_SET)
1990		✗	return AVERROR(EINVAL);
1991		✗	if (off < 0)
1992		✗	return AVERROR(EINVAL);
1993		✗	s->off = off;
1994
1995		✗	if (s->off && h->is_streamed)
1996		✗	return AVERROR(ENOSYS);
1997
1998			/* do not try to make a new connection if seeking past the end of the file */
1999		✗	if (s->end_off || s->filesize != UINT64_MAX) {
2000		✗	uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
2001		✗	if (s->off >= end_pos)
2002		✗	return s->off;
2003			}
2004
2005			/* if the location changed (redirect), revert to the original uri */
2006		✗	if (strcmp(s->uri, s->location)) {
2007			char *new_uri;
2008		✗	new_uri = av_strdup(s->uri);
2009		✗	if (!new_uri)
2010		✗	return AVERROR(ENOMEM);
2011		✗	av_free(s->location);
2012		✗	s->location = new_uri;
2013			}
2014
2015			/* we save the old context in case the seek fails */
2016		✗	old_buf_size = s->buf_end - s->buf_ptr;
2017		✗	memcpy(old_buf, s->buf_ptr, old_buf_size);
2018		✗	s->hd = NULL;
2019
2020			/* if it fails, continue on old connection */
2021		✗	if ((ret = http_open_cnx(h, &options)) < 0) {
2022		✗	av_dict_free(&options);
2023		✗	memcpy(s->buffer, old_buf, old_buf_size);
2024		✗	s->buf_ptr = s->buffer;
2025		✗	s->buf_end = s->buffer + old_buf_size;
2026		✗	s->hd = old_hd;
2027		✗	s->off = old_off;
2028		✗	return ret;
2029			}
2030		✗	av_dict_free(&options);
2031		✗	ffurl_close(old_hd);
2032		✗	return off;
2033			}
2034
2035		✗	static int64_t http_seek(URLContext *h, int64_t off, int whence)
2036			{
2037		✗	return http_seek_internal(h, off, whence, 0);
2038			}
2039
2040		✗	static int http_get_file_handle(URLContext *h)
2041			{
2042		✗	HTTPContext *s = h->priv_data;
2043		✗	return ffurl_get_file_handle(s->hd);
2044			}
2045
2046		✗	static int http_get_short_seek(URLContext *h)
2047			{
2048		✗	HTTPContext *s = h->priv_data;
2049		✗	if (s->short_seek_size >= 1)
2050		✗	return s->short_seek_size;
2051		✗	return ffurl_get_short_seek(s->hd);
2052			}
2053
2054			#define HTTP_CLASS(flavor) \
2055			static const AVClass flavor ## _context_class = { \
2056			.class_name = # flavor, \
2057			.item_name = av_default_item_name, \
2058			.option = options, \
2059			.version = LIBAVUTIL_VERSION_INT, \
2060			}
2061
2062			#if CONFIG_HTTP_PROTOCOL
2063			HTTP_CLASS(http);
2064
2065			const URLProtocol ff_http_protocol = {
2066			.name = "http",
2067			.url_open2 = http_open,
2068			.url_accept = http_accept,
2069			.url_handshake = http_handshake,
2070			.url_read = http_read,
2071			.url_write = http_write,
2072			.url_seek = http_seek,
2073			.url_close = http_close,
2074			.url_get_file_handle = http_get_file_handle,
2075			.url_get_short_seek = http_get_short_seek,
2076			.url_shutdown = http_shutdown,
2077			.priv_data_size = sizeof(HTTPContext),
2078			.priv_data_class = &http_context_class,
2079			.flags = URL_PROTOCOL_FLAG_NETWORK,
2080			.default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
2081			};
2082			#endif /* CONFIG_HTTP_PROTOCOL */
2083
2084			#if CONFIG_HTTPS_PROTOCOL
2085			HTTP_CLASS(https);
2086
2087			const URLProtocol ff_https_protocol = {
2088			.name = "https",
2089			.url_open2 = http_open,
2090			.url_read = http_read,
2091			.url_write = http_write,
2092			.url_seek = http_seek,
2093			.url_close = http_close,
2094			.url_get_file_handle = http_get_file_handle,
2095			.url_get_short_seek = http_get_short_seek,
2096			.url_shutdown = http_shutdown,
2097			.priv_data_size = sizeof(HTTPContext),
2098			.priv_data_class = &https_context_class,
2099			.flags = URL_PROTOCOL_FLAG_NETWORK,
2100			.default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
2101			};
2102			#endif /* CONFIG_HTTPS_PROTOCOL */
2103
2104			#if CONFIG_HTTPPROXY_PROTOCOL
2105		✗	static int http_proxy_close(URLContext *h)
2106			{
2107		✗	HTTPContext *s = h->priv_data;
2108		✗	if (s->hd)
2109		✗	ffurl_closep(&s->hd);
2110		✗	return 0;
2111			}
2112
2113		✗	static int http_proxy_open(URLContext *h, const char *uri, int flags)
2114			{
2115		✗	HTTPContext *s = h->priv_data;
2116			char hostname[1024], hoststr[1024];
2117			char auth[1024], pathbuf[1024], *path;
2118			char lower_url[100];
2119		✗	int port, ret = 0, auth_attempts = 0;
2120			HTTPAuthType cur_auth_type;
2121			char *authstr;
2122
2123		✗	if( s->seekable == 1 )
2124		✗	h->is_streamed = 0;
2125			else
2126		✗	h->is_streamed = 1;
2127
2128		✗	av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
2129			pathbuf, sizeof(pathbuf), uri);
2130		✗	ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
2131		✗	path = pathbuf;
2132		✗	if (*path == '/')
2133		✗	path++;
2134
2135		✗	ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
2136			NULL);
2137		✗	redo:
2138		✗	ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
2139		✗	&h->interrupt_callback, NULL,
2140			h->protocol_whitelist, h->protocol_blacklist, h);
2141		✗	if (ret < 0)
2142		✗	return ret;
2143
2144		✗	authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
2145			path, "CONNECT");
2146		✗	snprintf(s->buffer, sizeof(s->buffer),
2147			"CONNECT %s HTTP/1.1\r\n"
2148			"Host: %s\r\n"
2149			"Connection: close\r\n"
2150			"%s%s"
2151			"\r\n",
2152			path,
2153			hoststr,
2154		✗	authstr ? "Proxy-" : "", authstr ? authstr : "");
2155		✗	av_freep(&authstr);
2156
2157		✗	if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
2158		✗	goto fail;
2159
2160		✗	s->buf_ptr = s->buffer;
2161		✗	s->buf_end = s->buffer;
2162		✗	s->line_count = 0;
2163		✗	s->filesize = UINT64_MAX;
2164		✗	cur_auth_type = s->proxy_auth_state.auth_type;
2165
2166			/* Note: This uses buffering, potentially reading more than the
2167			* HTTP header. If tunneling a protocol where the server starts
2168			* the conversation, we might buffer part of that here, too.
2169			* Reading that requires using the proper ffurl_read() function
2170			* on this URLContext, not using the fd directly (as the tls
2171			* protocol does). This shouldn't be an issue for tls though,
2172			* since the client starts the conversation there, so there
2173			* is no extra data that we might buffer up here.
2174			*/
2175		✗	ret = http_read_header(h);
2176		✗	if (ret < 0)
2177		✗	goto fail;
2178
2179		✗	auth_attempts++;
2180		✗	if (s->http_code == 407 &&
2181		✗	(cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
2182		✗	s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 2) {
2183		✗	ffurl_closep(&s->hd);
2184		✗	goto redo;
2185			}
2186
2187		✗	if (s->http_code < 400)
2188		✗	return 0;
2189		✗	ret = ff_http_averror(s->http_code, AVERROR(EIO));
2190
2191		✗	fail:
2192		✗	http_proxy_close(h);
2193		✗	return ret;
2194			}
2195
2196		✗	static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
2197			{
2198		✗	HTTPContext *s = h->priv_data;
2199		✗	return ffurl_write(s->hd, buf, size);
2200			}
2201
2202			const URLProtocol ff_httpproxy_protocol = {
2203			.name = "httpproxy",
2204			.url_open = http_proxy_open,
2205			.url_read = http_buf_read,
2206			.url_write = http_proxy_write,
2207			.url_close = http_proxy_close,
2208			.url_get_file_handle = http_get_file_handle,
2209			.priv_data_size = sizeof(HTTPContext),
2210			.flags = URL_PROTOCOL_FLAG_NETWORK,
2211			};
2212			#endif /* CONFIG_HTTPPROXY_PROTOCOL */
2213