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1			/*
2			* HTTP protocol for ffmpeg client
3			* Copyright (c) 2000, 2001 Fabrice Bellard
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include <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, "http")) {
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, "http")))
493		✗	return AVERROR(EINVAL);
494
495		✗	av_url_split(proto1, sizeof(proto1), NULL, 0,
496			hostname1, sizeof(hostname1), &port1,
497		✗	NULL, 0, s->location);
498		✗	av_url_split(proto2, sizeof(proto2), NULL, 0,
499			hostname2, sizeof(hostname2), &port2,
500			NULL, 0, uri);
501		✗	if (strcmp(proto1, proto2) != 0) {
502		✗	av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different protocol %s vs %s\n",
503			proto1, proto2);
504		✗	return AVERROR(EINVAL);
505			}
506		✗	if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
507		✗	av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
508			hostname1, port1,
509			hostname2, port2
510			);
511		✗	return AVERROR(EINVAL);
512			}
513
514		✗	if (!s->end_chunked_post) {
515		✗	ret = http_shutdown(h, h->flags);
516		✗	if (ret < 0)
517		✗	return ret;
518			}
519
520		✗	if (s->willclose)
521		✗	return AVERROR_EOF;
522
523		✗	s->end_chunked_post = 0;
524		✗	s->chunkend = 0;
525		✗	s->off = 0;
526		✗	s->icy_data_read = 0;
527
528		✗	av_free(s->location);
529		✗	s->location = av_strdup(uri);
530		✗	if (!s->location)
531		✗	return AVERROR(ENOMEM);
532
533		✗	av_free(s->uri);
534		✗	s->uri = av_strdup(uri);
535		✗	if (!s->uri)
536		✗	return AVERROR(ENOMEM);
537
538		✗	if ((ret = av_opt_set_dict(s, opts)) < 0)
539		✗	return ret;
540
541		✗	av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
542		✗	ret = http_open_cnx(h, &options);
543		✗	av_dict_free(&options);
544		✗	return ret;
545			}
546
547		✗	int ff_http_averror(int status_code, int default_averror)
548			{
549		✗	switch (status_code) {
550		✗	case 400: return AVERROR_HTTP_BAD_REQUEST;
551		✗	case 401: return AVERROR_HTTP_UNAUTHORIZED;
552		✗	case 403: return AVERROR_HTTP_FORBIDDEN;
553		✗	case 404: return AVERROR_HTTP_NOT_FOUND;
554		✗	case 429: return AVERROR_HTTP_TOO_MANY_REQUESTS;
555		✗	default: break;
556			}
557		✗	if (status_code >= 400 && status_code <= 499)
558		✗	return AVERROR_HTTP_OTHER_4XX;
559		✗	else if (status_code >= 500)
560		✗	return AVERROR_HTTP_SERVER_ERROR;
561			else
562		✗	return default_averror;
563			}
564
565		✗	const char* ff_http_get_new_location(URLContext *h)
566			{
567		✗	HTTPContext *s = h->priv_data;
568		✗	return s->new_location;
569			}
570
571		✗	static int http_write_reply(URLContext* h, int status_code)
572			{
573		✗	int ret, body = 0, reply_code, message_len;
574			const char *reply_text, *content_type;
575		✗	HTTPContext *s = h->priv_data;
576			char message[BUFFER_SIZE];
577		✗	content_type = "text/plain";
578
579		✗	if (status_code < 0)
580		✗	body = 1;
581		✗	switch (status_code) {
582		✗	case AVERROR_HTTP_BAD_REQUEST:
583			case 400:
584		✗	reply_code = 400;
585		✗	reply_text = "Bad Request";
586		✗	break;
587		✗	case AVERROR_HTTP_FORBIDDEN:
588			case 403:
589		✗	reply_code = 403;
590		✗	reply_text = "Forbidden";
591		✗	break;
592		✗	case AVERROR_HTTP_NOT_FOUND:
593			case 404:
594		✗	reply_code = 404;
595		✗	reply_text = "Not Found";
596		✗	break;
597		✗	case AVERROR_HTTP_TOO_MANY_REQUESTS:
598			case 429:
599		✗	reply_code = 429;
600		✗	reply_text = "Too Many Requests";
601		✗	break;
602		✗	case 200:
603		✗	reply_code = 200;
604		✗	reply_text = "OK";
605		✗	content_type = s->content_type ? s->content_type : "application/octet-stream";
606		✗	break;
607		✗	case AVERROR_HTTP_SERVER_ERROR:
608			case 500:
609		✗	reply_code = 500;
610		✗	reply_text = "Internal server error";
611		✗	break;
612		✗	default:
613		✗	return AVERROR(EINVAL);
614			}
615		✗	if (body) {
616		✗	s->chunked_post = 0;
617		✗	message_len = snprintf(message, sizeof(message),
618			"HTTP/1.1 %03d %s\r\n"
619			"Content-Type: %s\r\n"
620			"Content-Length: %"SIZE_SPECIFIER"\r\n"
621			"%s"
622			"\r\n"
623			"%03d %s\r\n",
624			reply_code,
625			reply_text,
626			content_type,
627		✗	strlen(reply_text) + 6, // 3 digit status code + space + \r\n
628		✗	s->headers ? s->headers : "",
629			reply_code,
630			reply_text);
631			} else {
632		✗	s->chunked_post = 1;
633		✗	message_len = snprintf(message, sizeof(message),
634			"HTTP/1.1 %03d %s\r\n"
635			"Content-Type: %s\r\n"
636			"Transfer-Encoding: chunked\r\n"
637			"%s"
638			"\r\n",
639			reply_code,
640			reply_text,
641			content_type,
642		✗	s->headers ? s->headers : "");
643			}
644		✗	av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
645		✗	if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
646		✗	return ret;
647		✗	return 0;
648			}
649
650		✗	static void handle_http_errors(URLContext *h, int error)
651			{
652		✗	av_assert0(error < 0);
653		✗	http_write_reply(h, error);
654		✗	}
655
656		✗	static int http_handshake(URLContext *c)
657			{
658			int ret, err;
659		✗	HTTPContext *ch = c->priv_data;
660		✗	URLContext *cl = ch->hd;
661		✗	switch (ch->handshake_step) {
662		✗	case LOWER_PROTO:
663		✗	av_log(c, AV_LOG_TRACE, "Lower protocol\n");
664		✗	if ((ret = ffurl_handshake(cl)) > 0)
665		✗	return 2 + ret;
666		✗	if (ret < 0)
667		✗	return ret;
668		✗	ch->handshake_step = READ_HEADERS;
669		✗	ch->is_connected_server = 1;
670		✗	return 2;
671		✗	case READ_HEADERS:
672		✗	av_log(c, AV_LOG_TRACE, "Read headers\n");
673		✗	if ((err = http_read_header(c)) < 0) {
674		✗	handle_http_errors(c, err);
675		✗	return err;
676			}
677		✗	ch->handshake_step = WRITE_REPLY_HEADERS;
678		✗	return 1;
679		✗	case WRITE_REPLY_HEADERS:
680		✗	av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
681		✗	if ((err = http_write_reply(c, ch->reply_code)) < 0)
682		✗	return err;
683		✗	ch->handshake_step = FINISH;
684		✗	return 1;
685		✗	case FINISH:
686		✗	return 0;
687			}
688			// this should never be reached.
689		✗	return AVERROR(EINVAL);
690			}
691
692		✗	static int http_listen(URLContext *h, const char *uri, int flags,
693			AVDictionary **options) {
694		✗	HTTPContext *s = h->priv_data;
695			int ret;
696			char hostname[1024], proto[10];
697			char lower_url[100];
698		✗	const char *lower_proto = "tcp";
699			int port;
700		✗	av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
701			NULL, 0, uri);
702		✗	if (!strcmp(proto, "http"))
703		✗	lower_proto = "tls";
704		✗	ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
705			NULL);
706		✗	if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
707		✗	goto fail;
708		✗	if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
709		✗	&h->interrupt_callback, options,
710			h->protocol_whitelist, h->protocol_blacklist, h
711			)) < 0)
712		✗	goto fail;
713		✗	s->handshake_step = LOWER_PROTO;
714		✗	if (s->listen == HTTP_SINGLE) { /* single client */
715		✗	s->reply_code = 200;
716		✗	while ((ret = http_handshake(h)) > 0);
717			}
718		✗	fail:
719		✗	av_dict_free(&s->chained_options);
720		✗	av_dict_free(&s->cookie_dict);
721		✗	return ret;
722			}
723
724		✗	static int http_open(URLContext *h, const char *uri, int flags,
725			AVDictionary **options)
726			{
727		✗	HTTPContext *s = h->priv_data;
728			int ret;
729
730		✗	if( s->seekable == 1 )
731		✗	h->is_streamed = 0;
732			else
733		✗	h->is_streamed = 1;
734
735		✗	s->filesize = UINT64_MAX;
736
737		✗	s->location = av_strdup(uri);
738		✗	if (!s->location)
739		✗	return AVERROR(ENOMEM);
740
741		✗	s->uri = av_strdup(uri);
742		✗	if (!s->uri)
743		✗	return AVERROR(ENOMEM);
744
745		✗	if (options)
746		✗	av_dict_copy(&s->chained_options, *options, 0);
747
748		✗	if (s->headers) {
749		✗	int len = strlen(s->headers);
750		✗	if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
751		✗	av_log(h, AV_LOG_WARNING,
752			"No trailing CRLF found in HTTP header. Adding it.\n");
753		✗	ret = av_reallocp(&s->headers, len + 3);
754		✗	if (ret < 0)
755		✗	goto bail_out;
756		✗	s->headers[len] = '\r';
757		✗	s->headers[len + 1] = '\n';
758		✗	s->headers[len + 2] = '\0';
759			}
760			}
761
762		✗	if (s->listen) {
763		✗	return http_listen(h, uri, flags, options);
764			}
765		✗	ret = http_open_cnx(h, options);
766		✗	bail_out:
767		✗	if (ret < 0) {
768		✗	av_dict_free(&s->chained_options);
769		✗	av_dict_free(&s->cookie_dict);
770		✗	av_dict_free(&s->redirect_cache);
771		✗	av_freep(&s->new_location);
772		✗	av_freep(&s->uri);
773			}
774		✗	return ret;
775			}
776
777		✗	static int http_accept(URLContext *s, URLContext **c)
778			{
779			int ret;
780		✗	HTTPContext *sc = s->priv_data;
781			HTTPContext *cc;
782		✗	URLContext *sl = sc->hd;
783		✗	URLContext *cl = NULL;
784
785		✗	av_assert0(sc->listen);
786		✗	if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
787		✗	goto fail;
788		✗	cc = (*c)->priv_data;
789		✗	if ((ret = ffurl_accept(sl, &cl)) < 0)
790		✗	goto fail;
791		✗	cc->hd = cl;
792		✗	cc->is_multi_client = 1;
793		✗	return 0;
794		✗	fail:
795		✗	if (c) {
796		✗	ffurl_closep(c);
797			}
798		✗	return ret;
799			}
800
801		✗	static int http_getc(HTTPContext *s)
802			{
803			int len;
804		✗	if (s->buf_ptr >= s->buf_end) {
805		✗	len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
806		✗	if (len < 0) {
807		✗	return len;
808		✗	} else if (len == 0) {
809		✗	return AVERROR_EOF;
810			} else {
811		✗	s->buf_ptr = s->buffer;
812		✗	s->buf_end = s->buffer + len;
813			}
814			}
815		✗	return *s->buf_ptr++;
816			}
817
818		✗	static int http_get_line(HTTPContext *s, char *line, int line_size)
819			{
820			int ch;
821			char *q;
822
823		✗	q = line;
824			for (;;) {
825		✗	ch = http_getc(s);
826		✗	if (ch < 0)
827		✗	return ch;
828		✗	if (ch == '\n') {
829			/* process line */
830		✗	if (q > line && q[-1] == '\r')
831		✗	q--;
832		✗	*q = '\0';
833
834		✗	return 0;
835			} else {
836		✗	if ((q - line) < line_size - 1)
837		✗	*q++ = ch;
838			}
839			}
840			}
841
842		✗	static int check_http_code(URLContext *h, int http_code, const char *end)
843			{
844		✗	HTTPContext *s = h->priv_data;
845			/* error codes are 4xx and 5xx, but regard 401 as a success, so we
846			* don't abort until all headers have been parsed. */
847		✗	if (http_code >= 400 && http_code < 600 &&
848		✗	(http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
849		✗	(http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
850		✗	end += strspn(end, SPACE_CHARS);
851		✗	av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
852		✗	return ff_http_averror(http_code, AVERROR(EIO));
853			}
854		✗	return 0;
855			}
856
857		✗	static int parse_location(HTTPContext *s, const char *p)
858			{
859			char redirected_location[MAX_URL_SIZE];
860		✗	ff_make_absolute_url(redirected_location, sizeof(redirected_location),
861		✗	s->location, p);
862		✗	av_freep(&s->new_location);
863		✗	s->new_location = av_strdup(redirected_location);
864		✗	if (!s->new_location)
865		✗	return AVERROR(ENOMEM);
866		✗	return 0;
867			}
868
869			/* "bytes $from-$to/$document_size" */
870		✗	static void parse_content_range(URLContext *h, const char *p)
871			{
872		✗	HTTPContext *s = h->priv_data;
873			const char *slash;
874
875		✗	if (!strncmp(p, "bytes ", 6)) {
876		✗	p += 6;
877		✗	s->off = strtoull(p, NULL, 10);
878		✗	if ((slash = strchr(p, '/')) && strlen(slash) > 0)
879		✗	s->filesize_from_content_range = strtoull(slash + 1, NULL, 10);
880			}
881		✗	if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
882		✗	h->is_streamed = 0; /* we _can_ in fact seek */
883		✗	}
884
885		✗	static int parse_content_encoding(URLContext *h, const char *p)
886			{
887		✗	if (!av_strncasecmp(p, "gzip", 4) ||
888		✗	!av_strncasecmp(p, "deflate", 7)) {
889			#if CONFIG_ZLIB
890		✗	HTTPContext *s = h->priv_data;
891
892		✗	s->compressed = 1;
893		✗	inflateEnd(&s->inflate_stream);
894		✗	if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
895		✗	av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
896			s->inflate_stream.msg);
897		✗	return AVERROR(ENOSYS);
898			}
899		✗	if (zlibCompileFlags() & (1 << 17)) {
900		✗	av_log(h, AV_LOG_WARNING,
901			"Your zlib was compiled without gzip support.\n");
902		✗	return AVERROR(ENOSYS);
903			}
904			#else
905			av_log(h, AV_LOG_WARNING,
906			"Compressed (%s) content, need zlib with gzip support\n", p);
907			return AVERROR(ENOSYS);
908			#endif /* CONFIG_ZLIB */
909		✗	} else if (!av_strncasecmp(p, "identity", 8)) {
910			// The normal, no-encoding case (although servers shouldn't include
911			// the header at all if this is the case).
912			} else {
913		✗	av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
914			}
915		✗	return 0;
916			}
917
918			// Concat all Icy- header lines
919		✗	static int parse_icy(HTTPContext *s, const char *tag, const char *p)
920			{
921		✗	int len = 4 + strlen(p) + strlen(tag);
922		✗	int is_first = !s->icy_metadata_headers;
923			int ret;
924
925		✗	av_dict_set(&s->metadata, tag, p, 0);
926
927		✗	if (s->icy_metadata_headers)
928		✗	len += strlen(s->icy_metadata_headers);
929
930		✗	if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
931		✗	return ret;
932
933		✗	if (is_first)
934		✗	*s->icy_metadata_headers = '\0';
935
936		✗	av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
937
938		✗	return 0;
939			}
940
941		✗	static int parse_http_date(const char *date_str, struct tm *buf)
942			{
943			char date_buf[MAX_DATE_LEN];
944		✗	int i, j, date_buf_len = MAX_DATE_LEN-1;
945			char *date;
946
947			// strip off any punctuation or whitespace
948		✗	for (i = 0, j = 0; date_str[i] != '\0' && j < date_buf_len; i++) {
949		✗	if ((date_str[i] >= '0' && date_str[i] <= '9') ||
950		✗	(date_str[i] >= 'A' && date_str[i] <= 'Z') ||
951		✗	(date_str[i] >= 'a' && date_str[i] <= 'z')) {
952		✗	date_buf[j] = date_str[i];
953		✗	j++;
954			}
955			}
956		✗	date_buf[j] = '\0';
957		✗	date = date_buf;
958
959			// move the string beyond the day of week
960		✗	while ((*date < '0' || *date > '9') && *date != '\0')
961		✗	date++;
962
963		✗	return av_small_strptime(date, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
964			}
965
966		✗	static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
967			{
968			char *param, *next_param, *cstr, *back;
969		✗	char *saveptr = NULL;
970
971		✗	if (!set_cookie[0])
972		✗	return 0;
973
974		✗	if (!(cstr = av_strdup(set_cookie)))
975		✗	return AVERROR(EINVAL);
976
977			// strip any trailing whitespace
978		✗	back = &cstr[strlen(cstr)-1];
979		✗	while (strchr(WHITESPACES, *back)) {
980		✗	*back='\0';
981		✗	if (back == cstr)
982		✗	break;
983		✗	back--;
984			}
985
986		✗	next_param = cstr;
987		✗	while ((param = av_strtok(next_param, ";", &saveptr))) {
988			char *name, *value;
989		✗	next_param = NULL;
990		✗	param += strspn(param, WHITESPACES);
991		✗	if ((name = av_strtok(param, "=", &value))) {
992		✗	if (av_dict_set(dict, name, value, 0) < 0) {
993		✗	av_free(cstr);
994		✗	return -1;
995			}
996			}
997			}
998
999		✗	av_free(cstr);
1000		✗	return 0;
1001			}
1002
1003		✗	static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
1004			{
1005		✗	AVDictionary *new_params = NULL;
1006			const AVDictionaryEntry *e, *cookie_entry;
1007			char *eql, *name;
1008
1009			// ensure the cookie is parsable
1010		✗	if (parse_set_cookie(p, &new_params))
1011		✗	return -1;
1012
1013			// if there is no cookie value there is nothing to parse
1014		✗	cookie_entry = av_dict_iterate(new_params, NULL);
1015		✗	if (!cookie_entry || !cookie_entry->value) {
1016		✗	av_dict_free(&new_params);
1017		✗	return -1;
1018			}
1019
1020			// ensure the cookie is not expired or older than an existing value
1021		✗	if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
1022		✗	struct tm new_tm = {0};
1023		✗	if (!parse_http_date(e->value, &new_tm)) {
1024			AVDictionaryEntry *e2;
1025
1026			// if the cookie has already expired ignore it
1027		✗	if (av_timegm(&new_tm) < av_gettime() / 1000000) {
1028		✗	av_dict_free(&new_params);
1029		✗	return 0;
1030			}
1031
1032			// only replace an older cookie with the same name
1033		✗	e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
1034		✗	if (e2 && e2->value) {
1035		✗	AVDictionary *old_params = NULL;
1036		✗	if (!parse_set_cookie(p, &old_params)) {
1037		✗	e2 = av_dict_get(old_params, "expires", NULL, 0);
1038		✗	if (e2 && e2->value) {
1039		✗	struct tm old_tm = {0};
1040		✗	if (!parse_http_date(e->value, &old_tm)) {
1041		✗	if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
1042		✗	av_dict_free(&new_params);
1043		✗	av_dict_free(&old_params);
1044		✗	return -1;
1045			}
1046			}
1047			}
1048			}
1049		✗	av_dict_free(&old_params);
1050			}
1051			}
1052			}
1053		✗	av_dict_free(&new_params);
1054
1055			// duplicate the cookie name (dict will dupe the value)
1056		✗	if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
1057		✗	if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
1058
1059			// add the cookie to the dictionary
1060		✗	av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
1061
1062		✗	return 0;
1063			}
1064
1065		✗	static int cookie_string(AVDictionary *dict, char **cookies)
1066			{
1067		✗	const AVDictionaryEntry *e = NULL;
1068		✗	int len = 1;
1069
1070			// determine how much memory is needed for the cookies string
1071		✗	while ((e = av_dict_iterate(dict, e)))
1072		✗	len += strlen(e->key) + strlen(e->value) + 1;
1073
1074			// reallocate the cookies
1075		✗	e = NULL;
1076		✗	if (*cookies) av_free(*cookies);
1077		✗	*cookies = av_malloc(len);
1078		✗	if (!*cookies) return AVERROR(ENOMEM);
1079		✗	*cookies[0] = '\0';
1080
1081			// write out the cookies
1082		✗	while ((e = av_dict_iterate(dict, e)))
1083		✗	av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
1084
1085		✗	return 0;
1086			}
1087
1088		✗	static void parse_expires(HTTPContext *s, const char *p)
1089			{
1090			struct tm tm;
1091
1092		✗	if (!parse_http_date(p, &tm)) {
1093		✗	s->expires = av_timegm(&tm);
1094			}
1095		✗	}
1096
1097		✗	static void parse_cache_control(HTTPContext *s, const char *p)
1098			{
1099			char *age;
1100			int offset;
1101
1102			/* give 'Expires' higher priority over 'Cache-Control' */
1103		✗	if (s->expires) {
1104		✗	return;
1105			}
1106
1107		✗	if (av_stristr(p, "no-cache") || av_stristr(p, "no-store")) {
1108		✗	s->expires = -1;
1109		✗	return;
1110			}
1111
1112		✗	age = av_stristr(p, "s-maxage=");
1113		✗	offset = 9;
1114		✗	if (!age) {
1115		✗	age = av_stristr(p, "max-age=");
1116		✗	offset = 8;
1117			}
1118
1119		✗	if (age) {
1120		✗	s->expires = time(NULL) + atoi(p + offset);
1121			}
1122			}
1123
1124		✗	static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
1125			{
1126		✗	HTTPContext *s = h->priv_data;
1127		✗	const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
1128			char *tag, *p, *end, *method, *resource, *version;
1129			int ret;
1130
1131			/* end of header */
1132		✗	if (line[0] == '\0') {
1133		✗	s->end_header = 1;
1134		✗	return 0;
1135			}
1136
1137		✗	p = line;
1138		✗	if (line_count == 0) {
1139		✗	if (s->is_connected_server) {
1140			// HTTP method
1141		✗	method = p;
1142		✗	while (*p && !av_isspace(*p))
1143		✗	p++;
1144		✗	*(p++) = '\0';
1145		✗	av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
1146		✗	if (s->method) {
1147		✗	if (av_strcasecmp(s->method, method)) {
1148		✗	av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
1149			s->method, method);
1150		✗	return ff_http_averror(400, AVERROR(EIO));
1151			}
1152			} else {
1153			// use autodetected HTTP method to expect
1154		✗	av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1155		✗	if (av_strcasecmp(auto_method, method)) {
1156		✗	av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1157			"(%s autodetected %s received)\n", auto_method, method);
1158		✗	return ff_http_averror(400, AVERROR(EIO));
1159			}
1160		✗	if (!(s->method = av_strdup(method)))
1161		✗	return AVERROR(ENOMEM);
1162			}
1163
1164			// HTTP resource
1165		✗	while (av_isspace(*p))
1166		✗	p++;
1167		✗	resource = p;
1168		✗	while (*p && !av_isspace(*p))
1169		✗	p++;
1170		✗	*(p++) = '\0';
1171		✗	av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1172		✗	if (!(s->resource = av_strdup(resource)))
1173		✗	return AVERROR(ENOMEM);
1174
1175			// HTTP version
1176		✗	while (av_isspace(*p))
1177		✗	p++;
1178		✗	version = p;
1179		✗	while (*p && !av_isspace(*p))
1180		✗	p++;
1181		✗	*p = '\0';
1182		✗	if (av_strncasecmp(version, "HTTP/", 5)) {
1183		✗	av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1184		✗	return ff_http_averror(400, AVERROR(EIO));
1185			}
1186		✗	av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1187			} else {
1188		✗	if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1189		✗	s->willclose = 1;
1190		✗	while (*p != '/' && *p != '\0')
1191		✗	p++;
1192		✗	while (*p == '/')
1193		✗	p++;
1194		✗	av_freep(&s->http_version);
1195		✗	s->http_version = av_strndup(p, 3);
1196		✗	while (!av_isspace(*p) && *p != '\0')
1197		✗	p++;
1198		✗	while (av_isspace(*p))
1199		✗	p++;
1200		✗	s->http_code = strtol(p, &end, 10);
1201
1202		✗	av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1203
1204		✗	*parsed_http_code = 1;
1205
1206		✗	if ((ret = check_http_code(h, s->http_code, end)) < 0)
1207		✗	return ret;
1208			}
1209			} else {
1210		✗	while (*p != '\0' && *p != ':')
1211		✗	p++;
1212		✗	if (*p != ':')
1213		✗	return 1;
1214
1215		✗	*p = '\0';
1216		✗	tag = line;
1217		✗	p++;
1218		✗	while (av_isspace(*p))
1219		✗	p++;
1220		✗	if (!av_strcasecmp(tag, "Location")) {
1221		✗	if ((ret = parse_location(s, p)) < 0)
1222		✗	return ret;
1223		✗	} else if (!av_strcasecmp(tag, "Content-Length") &&
1224		✗	s->filesize == UINT64_MAX) {
1225		✗	s->filesize = strtoull(p, NULL, 10);
1226		✗	} else if (!av_strcasecmp(tag, "Content-Range")) {
1227		✗	parse_content_range(h, p);
1228		✗	} else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1229		✗	!strncmp(p, "bytes", 5) &&
1230		✗	s->seekable == -1) {
1231		✗	h->is_streamed = 0;
1232		✗	} else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1233		✗	!av_strncasecmp(p, "chunked", 7)) {
1234		✗	s->filesize = UINT64_MAX;
1235		✗	s->chunksize = 0;
1236		✗	} else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1237		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1238		✗	} else if (!av_strcasecmp(tag, "Authentication-Info")) {
1239		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1240		✗	} else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1241		✗	ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1242		✗	} else if (!av_strcasecmp(tag, "Connection")) {
1243		✗	if (!strcmp(p, "close"))
1244		✗	s->willclose = 1;
1245		✗	} else if (!av_strcasecmp(tag, "Server")) {
1246		✗	if (!av_strcasecmp(p, "AkamaiGHost")) {
1247		✗	s->is_akamai = 1;
1248		✗	} else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1249		✗	s->is_mediagateway = 1;
1250			}
1251		✗	} else if (!av_strcasecmp(tag, "Content-Type")) {
1252		✗	av_free(s->mime_type);
1253		✗	s->mime_type = av_get_token((const char **)&p, ";");
1254		✗	} else if (!av_strcasecmp(tag, "Set-Cookie")) {
1255		✗	if (parse_cookie(s, p, &s->cookie_dict))
1256		✗	av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1257		✗	} else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1258		✗	s->icy_metaint = strtoull(p, NULL, 10);
1259		✗	} else if (!av_strncasecmp(tag, "Icy-", 4)) {
1260		✗	if ((ret = parse_icy(s, tag, p)) < 0)
1261		✗	return ret;
1262		✗	} else if (!av_strcasecmp(tag, "Content-Encoding")) {
1263		✗	if ((ret = parse_content_encoding(h, p)) < 0)
1264		✗	return ret;
1265		✗	} else if (!av_strcasecmp(tag, "Expires")) {
1266		✗	parse_expires(s, p);
1267		✗	} else if (!av_strcasecmp(tag, "Cache-Control")) {
1268		✗	parse_cache_control(s, p);
1269		✗	} else if (!av_strcasecmp(tag, "Retry-After")) {
1270			/* The header can be either an integer that represents seconds, or a date. */
1271			struct tm tm;
1272		✗	int date_ret = parse_http_date(p, &tm);
1273		✗	if (!date_ret) {
1274		✗	time_t retry = av_timegm(&tm);
1275		✗	int64_t now = av_gettime() / 1000000;
1276		✗	int64_t diff = ((int64_t) retry) - now;
1277		✗	s->retry_after = (unsigned int) FFMAX(0, diff);
1278			} else {
1279		✗	s->retry_after = strtoul(p, NULL, 10);
1280			}
1281			}
1282			}
1283		✗	return 1;
1284			}
1285
1286			/**
1287			* Create a string containing cookie values for use as a HTTP cookie header
1288			* field value for a particular path and domain from the cookie values stored in
1289			* the HTTP protocol context. The cookie string is stored in *cookies, and may
1290			* be NULL if there are no valid cookies.
1291			*
1292			* @return a negative value if an error condition occurred, 0 otherwise
1293			*/
1294		✗	static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1295			const char *domain)
1296			{
1297			// cookie strings will look like Set-Cookie header field values. Multiple
1298			// Set-Cookie fields will result in multiple values delimited by a newline
1299		✗	int ret = 0;
1300			char *cookie, *set_cookies, *next;
1301		✗	char *saveptr = NULL;
1302
1303			// destroy any cookies in the dictionary.
1304		✗	av_dict_free(&s->cookie_dict);
1305
1306		✗	if (!s->cookies)
1307		✗	return 0;
1308
1309		✗	next = set_cookies = av_strdup(s->cookies);
1310		✗	if (!next)
1311		✗	return AVERROR(ENOMEM);
1312
1313		✗	*cookies = NULL;
1314		✗	while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1315		✗	AVDictionary *cookie_params = NULL;
1316			const AVDictionaryEntry *cookie_entry, *e;
1317
1318		✗	next = NULL;
1319			// store the cookie in a dict in case it is updated in the response
1320		✗	if (parse_cookie(s, cookie, &s->cookie_dict))
1321		✗	av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1322
1323			// continue on to the next cookie if this one cannot be parsed
1324		✗	if (parse_set_cookie(cookie, &cookie_params))
1325		✗	goto skip_cookie;
1326
1327			// if the cookie has no value, skip it
1328		✗	cookie_entry = av_dict_iterate(cookie_params, NULL);
1329		✗	if (!cookie_entry || !cookie_entry->value)
1330		✗	goto skip_cookie;
1331
1332			// if the cookie has expired, don't add it
1333		✗	if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1334		✗	struct tm tm_buf = {0};
1335		✗	if (!parse_http_date(e->value, &tm_buf)) {
1336		✗	if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1337		✗	goto skip_cookie;
1338			}
1339			}
1340
1341			// if no domain in the cookie assume it applied to this request
1342		✗	if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1343			// find the offset comparison is on the min domain (b.com, not a.b.com)
1344		✗	int domain_offset = strlen(domain) - strlen(e->value);
1345		✗	if (domain_offset < 0)
1346		✗	goto skip_cookie;
1347
1348			// match the cookie domain
1349		✗	if (av_strcasecmp(&domain[domain_offset], e->value))
1350		✗	goto skip_cookie;
1351			}
1352
1353			// if a cookie path is provided, ensure the request path is within that path
1354		✗	e = av_dict_get(cookie_params, "path", NULL, 0);
1355		✗	if (e && av_strncasecmp(path, e->value, strlen(e->value)))
1356		✗	goto skip_cookie;
1357
1358			// cookie parameters match, so copy the value
1359		✗	if (!*cookies) {
1360		✗	*cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1361			} else {
1362		✗	char *tmp = *cookies;
1363		✗	*cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1364		✗	av_free(tmp);
1365			}
1366		✗	if (!*cookies)
1367		✗	ret = AVERROR(ENOMEM);
1368
1369		✗	skip_cookie:
1370		✗	av_dict_free(&cookie_params);
1371			}
1372
1373		✗	av_free(set_cookies);
1374
1375		✗	return ret;
1376			}
1377
1378		✗	static inline int has_header(const char *str, const char *header)
1379			{
1380			/* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1381		✗	if (!str)
1382		✗	return 0;
1383		✗	return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1384			}
1385
1386		✗	static int http_read_header(URLContext *h)
1387			{
1388		✗	HTTPContext *s = h->priv_data;
1389			char line[MAX_URL_SIZE];
1390		✗	int err = 0, http_err = 0;
1391
1392		✗	av_freep(&s->new_location);
1393		✗	s->expires = 0;
1394		✗	s->chunksize = UINT64_MAX;
1395		✗	s->filesize_from_content_range = UINT64_MAX;
1396
1397		✗	for (;;) {
1398		✗	int parsed_http_code = 0;
1399
1400		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1401		✗	return err;
1402
1403		✗	av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1404
1405		✗	err = process_line(h, line, s->line_count, &parsed_http_code);
1406		✗	if (err < 0) {
1407		✗	if (parsed_http_code) {
1408		✗	http_err = err;
1409			} else {
1410			/* Prefer to return HTTP code error if we've already seen one. */
1411		✗	if (http_err)
1412		✗	return http_err;
1413			else
1414		✗	return err;
1415			}
1416			}
1417		✗	if (err == 0)
1418		✗	break;
1419		✗	s->line_count++;
1420			}
1421		✗	if (http_err)
1422		✗	return http_err;
1423
1424			// filesize from Content-Range can always be used, even if using chunked Transfer-Encoding
1425		✗	if (s->filesize_from_content_range != UINT64_MAX)
1426		✗	s->filesize = s->filesize_from_content_range;
1427
1428		✗	if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1429		✗	h->is_streamed = 1; /* we can in fact _not_ seek */
1430
1431			// add any new cookies into the existing cookie string
1432		✗	cookie_string(s->cookie_dict, &s->cookies);
1433		✗	av_dict_free(&s->cookie_dict);
1434
1435		✗	return err;
1436			}
1437
1438			/**
1439			* Escape unsafe characters in path in order to pass them safely to the HTTP
1440			* request. Insipred by the algorithm in GNU wget:
1441			* - escape "%" characters not followed by two hex digits
1442			* - escape all "unsafe" characters except which are also "reserved"
1443			* - pass through everything else
1444			*/
1445		✗	static void bprint_escaped_path(AVBPrint *bp, const char *path)
1446			{
1447			#define NEEDS_ESCAPE(ch) \
1448			((ch) <= ' ' || (ch) >= '\x7f' || \
1449			(ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1450			(ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1451		✗	while (*path) {
1452			char buf[1024];
1453		✗	char *q = buf;
1454		✗	while (*path && q - buf < sizeof(buf) - 4) {
1455		✗	if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1456		✗	*q++ = *path++;
1457		✗	*q++ = *path++;
1458		✗	*q++ = *path++;
1459		✗	} else if (NEEDS_ESCAPE(*path)) {
1460		✗	q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1461			} else {
1462		✗	*q++ = *path++;
1463			}
1464			}
1465		✗	av_bprint_append_data(bp, buf, q - buf);
1466			}
1467		✗	}
1468
1469		✗	static int http_connect(URLContext *h, const char *path, const char *local_path,
1470			const char *hoststr, const char *auth,
1471			const char *proxyauth)
1472			{
1473		✗	HTTPContext *s = h->priv_data;
1474			int post, err;
1475			AVBPrint request;
1476		✗	char *authstr = NULL, *proxyauthstr = NULL;
1477		✗	uint64_t off = s->off;
1478			const char *method;
1479		✗	int send_expect_100 = 0;
1480
1481		✗	av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1482
1483			/* send http header */
1484		✗	post = h->flags & AVIO_FLAG_WRITE;
1485
1486		✗	if (s->post_data) {
1487			/* force POST method and disable chunked encoding when
1488			* custom HTTP post data is set */
1489		✗	post = 1;
1490		✗	s->chunked_post = 0;
1491			}
1492
1493		✗	if (s->method)
1494		✗	method = s->method;
1495			else
1496		✗	method = post ? "POST" : "GET";
1497
1498		✗	authstr = ff_http_auth_create_response(&s->auth_state, auth,
1499			local_path, method);
1500		✗	proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1501			local_path, method);
1502
1503		✗	if (post && !s->post_data) {
1504		✗	if (s->send_expect_100 != -1) {
1505		✗	send_expect_100 = s->send_expect_100;
1506			} else {
1507		✗	send_expect_100 = 0;
1508			/* The user has supplied authentication but we don't know the auth type,
1509			* send Expect: 100-continue to get the 401 response including the
1510			* WWW-Authenticate header, or an 100 continue if no auth actually
1511			* is needed. */
1512		✗	if (auth && *auth &&
1513		✗	s->auth_state.auth_type == HTTP_AUTH_NONE &&
1514		✗	s->http_code != 401)
1515		✗	send_expect_100 = 1;
1516			}
1517			}
1518
1519		✗	av_bprintf(&request, "%s ", method);
1520		✗	bprint_escaped_path(&request, path);
1521		✗	av_bprintf(&request, " HTTP/1.1\r\n");
1522
1523		✗	if (post && s->chunked_post)
1524		✗	av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1525			/* set default headers if needed */
1526		✗	if (!has_header(s->headers, "\r\nUser-Agent: "))
1527		✗	av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1528		✗	if (s->referer) {
1529			/* set default headers if needed */
1530		✗	if (!has_header(s->headers, "\r\nReferer: "))
1531		✗	av_bprintf(&request, "Referer: %s\r\n", s->referer);
1532			}
1533		✗	if (!has_header(s->headers, "\r\nAccept: "))
1534		✗	av_bprintf(&request, "Accept: */*\r\n");
1535			// Note: we send the Range header on purpose, even when we're probing,
1536			// since it allows us to detect more reliably if a (non-conforming)
1537			// server supports seeking by analysing the reply headers.
1538		✗	if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable != 0)) {
1539		✗	av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1540		✗	if (s->end_off)
1541		✗	av_bprintf(&request, "%"PRId64, s->end_off - 1);
1542		✗	av_bprintf(&request, "\r\n");
1543			}
1544		✗	if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1545		✗	av_bprintf(&request, "Expect: 100-continue\r\n");
1546
1547		✗	if (!has_header(s->headers, "\r\nConnection: "))
1548		✗	av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1549
1550		✗	if (!has_header(s->headers, "\r\nHost: "))
1551		✗	av_bprintf(&request, "Host: %s\r\n", hoststr);
1552		✗	if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1553		✗	av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1554
1555		✗	if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1556		✗	av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1557		✗	if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1558		✗	char *cookies = NULL;
1559		✗	if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1560		✗	av_bprintf(&request, "Cookie: %s\r\n", cookies);
1561		✗	av_free(cookies);
1562			}
1563			}
1564		✗	if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1565		✗	av_bprintf(&request, "Icy-MetaData: 1\r\n");
1566
1567			/* now add in custom headers */
1568		✗	if (s->headers)
1569		✗	av_bprintf(&request, "%s", s->headers);
1570
1571		✗	if (authstr)
1572		✗	av_bprintf(&request, "%s", authstr);
1573		✗	if (proxyauthstr)
1574		✗	av_bprintf(&request, "Proxy-%s", proxyauthstr);
1575		✗	av_bprintf(&request, "\r\n");
1576
1577		✗	av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1578
1579		✗	if (!av_bprint_is_complete(&request)) {
1580		✗	av_log(h, AV_LOG_ERROR, "overlong headers\n");
1581		✗	err = AVERROR(EINVAL);
1582		✗	goto done;
1583			}
1584
1585		✗	if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1586		✗	goto done;
1587
1588		✗	if (s->post_data)
1589		✗	if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1590		✗	goto done;
1591
1592			/* init input buffer */
1593		✗	s->buf_ptr = s->buffer;
1594		✗	s->buf_end = s->buffer;
1595		✗	s->line_count = 0;
1596		✗	s->off = 0;
1597		✗	s->icy_data_read = 0;
1598		✗	s->filesize = UINT64_MAX;
1599		✗	s->willclose = 0;
1600		✗	s->end_chunked_post = 0;
1601		✗	s->end_header = 0;
1602			#if CONFIG_ZLIB
1603		✗	s->compressed = 0;
1604			#endif
1605		✗	if (post && !s->post_data && !send_expect_100) {
1606			/* Pretend that it did work. We didn't read any header yet, since
1607			* we've still to send the POST data, but the code calling this
1608			* function will check http_code after we return. */
1609		✗	s->http_code = 200;
1610		✗	err = 0;
1611		✗	goto done;
1612			}
1613
1614			/* wait for header */
1615		✗	err = http_read_header(h);
1616		✗	if (err < 0)
1617		✗	goto done;
1618
1619		✗	if (s->new_location)
1620		✗	s->off = off;
1621
1622		✗	err = (off == s->off) ? 0 : -1;
1623		✗	done:
1624		✗	av_freep(&authstr);
1625		✗	av_freep(&proxyauthstr);
1626		✗	return err;
1627			}
1628
1629		✗	static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1630			{
1631		✗	HTTPContext *s = h->priv_data;
1632			int len;
1633
1634		✗	if (s->chunksize != UINT64_MAX) {
1635		✗	if (s->chunkend) {
1636		✗	return AVERROR_EOF;
1637			}
1638		✗	if (!s->chunksize) {
1639			char line[32];
1640			int err;
1641
1642			do {
1643		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1644		✗	return err;
1645		✗	} while (!*line); /* skip CR LF from last chunk */
1646
1647		✗	s->chunksize = strtoull(line, NULL, 16);
1648
1649		✗	av_log(h, AV_LOG_TRACE,
1650			"Chunked encoding data size: %"PRIu64"\n",
1651			s->chunksize);
1652
1653		✗	if (!s->chunksize && s->multiple_requests) {
1654		✗	http_get_line(s, line, sizeof(line)); // read empty chunk
1655		✗	s->chunkend = 1;
1656		✗	return 0;
1657			}
1658		✗	else if (!s->chunksize) {
1659		✗	av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1660		✗	ffurl_closep(&s->hd);
1661		✗	return 0;
1662			}
1663		✗	else if (s->chunksize == UINT64_MAX) {
1664		✗	av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1665			s->chunksize);
1666		✗	return AVERROR(EINVAL);
1667			}
1668			}
1669		✗	size = FFMIN(size, s->chunksize);
1670			}
1671
1672			/* read bytes from input buffer first */
1673		✗	len = s->buf_end - s->buf_ptr;
1674		✗	if (len > 0) {
1675		✗	if (len > size)
1676		✗	len = size;
1677		✗	memcpy(buf, s->buf_ptr, len);
1678		✗	s->buf_ptr += len;
1679			} else {
1680		✗	uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1681		✗	if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1682		✗	return AVERROR_EOF;
1683		✗	len = ffurl_read(s->hd, buf, size);
1684		✗	if ((!len || len == AVERROR_EOF) &&
1685		✗	(!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1686		✗	av_log(h, AV_LOG_ERROR,
1687			"Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1688			s->off, target_end
1689			);
1690		✗	return AVERROR(EIO);
1691			}
1692			}
1693		✗	if (len > 0) {
1694		✗	s->off += len;
1695		✗	if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1696		✗	av_assert0(s->chunksize >= len);
1697		✗	s->chunksize -= len;
1698			}
1699			}
1700		✗	return len;
1701			}
1702
1703			#if CONFIG_ZLIB
1704			#define DECOMPRESS_BUF_SIZE (256 * 1024)
1705		✗	static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1706			{
1707		✗	HTTPContext *s = h->priv_data;
1708			int ret;
1709
1710		✗	if (!s->inflate_buffer) {
1711		✗	s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1712		✗	if (!s->inflate_buffer)
1713		✗	return AVERROR(ENOMEM);
1714			}
1715
1716		✗	if (s->inflate_stream.avail_in == 0) {
1717		✗	int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1718		✗	if (read <= 0)
1719		✗	return read;
1720		✗	s->inflate_stream.next_in = s->inflate_buffer;
1721		✗	s->inflate_stream.avail_in = read;
1722			}
1723
1724		✗	s->inflate_stream.avail_out = size;
1725		✗	s->inflate_stream.next_out = buf;
1726
1727		✗	ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1728		✗	if (ret != Z_OK && ret != Z_STREAM_END)
1729		✗	av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1730			ret, s->inflate_stream.msg);
1731
1732		✗	return size - s->inflate_stream.avail_out;
1733			}
1734			#endif /* CONFIG_ZLIB */
1735
1736			static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1737
1738		✗	static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1739			{
1740		✗	HTTPContext *s = h->priv_data;
1741			int err, read_ret;
1742			int64_t seek_ret;
1743		✗	int reconnect_delay = 0;
1744		✗	int reconnect_delay_total = 0;
1745		✗	int conn_attempts = 1;
1746
1747		✗	if (!s->hd)
1748		✗	return AVERROR_EOF;
1749
1750		✗	if (s->end_chunked_post && !s->end_header) {
1751		✗	err = http_read_header(h);
1752		✗	if (err < 0)
1753		✗	return err;
1754			}
1755
1756			#if CONFIG_ZLIB
1757		✗	if (s->compressed)
1758		✗	return http_buf_read_compressed(h, buf, size);
1759			#endif /* CONFIG_ZLIB */
1760		✗	read_ret = http_buf_read(h, buf, size);
1761		✗	while (read_ret < 0) {
1762		✗	uint64_t target = h->is_streamed ? 0 : s->off;
1763		✗	bool is_premature = s->filesize > 0 && s->off < s->filesize;
1764
1765		✗	if (read_ret == AVERROR_EXIT)
1766		✗	break;
1767
1768		✗	if (h->is_streamed && !s->reconnect_streamed)
1769		✗	break;
1770
1771		✗	if (!(s->reconnect && is_premature) &&
1772		✗	!(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
1773		✗	if (is_premature)
1774		✗	return AVERROR(EIO);
1775			else
1776		✗	break;
1777			}
1778
1779		✗	if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
1780		✗	reconnect_delay_total > s->reconnect_delay_total_max)
1781		✗	return AVERROR(EIO);
1782
1783		✗	av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s), error=%s.\n", s->off, reconnect_delay, av_err2str(read_ret));
1784		✗	err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1785		✗	if (err != AVERROR(ETIMEDOUT))
1786		✗	return err;
1787		✗	reconnect_delay_total += reconnect_delay;
1788		✗	reconnect_delay = 1 + 2*reconnect_delay;
1789		✗	conn_attempts++;
1790		✗	seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1791		✗	if (seek_ret >= 0 && seek_ret != target) {
1792		✗	av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1793		✗	return read_ret;
1794			}
1795
1796		✗	read_ret = http_buf_read(h, buf, size);
1797			}
1798
1799		✗	return read_ret;
1800			}
1801
1802			// Like http_read_stream(), but no short reads.
1803			// Assumes partial reads are an error.
1804		✗	static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1805			{
1806		✗	int pos = 0;
1807		✗	while (pos < size) {
1808		✗	int len = http_read_stream(h, buf + pos, size - pos);
1809		✗	if (len < 0)
1810		✗	return len;
1811		✗	pos += len;
1812			}
1813		✗	return pos;
1814			}
1815
1816		✗	static void update_metadata(URLContext *h, char *data)
1817			{
1818			char *key;
1819			char *val;
1820			char *end;
1821		✗	char *next = data;
1822		✗	HTTPContext *s = h->priv_data;
1823
1824		✗	while (*next) {
1825		✗	key = next;
1826		✗	val = strstr(key, "='");
1827		✗	if (!val)
1828		✗	break;
1829		✗	end = strstr(val, "';");
1830		✗	if (!end)
1831		✗	break;
1832
1833		✗	*val = '\0';
1834		✗	*end = '\0';
1835		✗	val += 2;
1836
1837		✗	av_dict_set(&s->metadata, key, val, 0);
1838		✗	av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1839
1840		✗	next = end + 2;
1841			}
1842		✗	}
1843
1844		✗	static int store_icy(URLContext *h, int size)
1845			{
1846		✗	HTTPContext *s = h->priv_data;
1847			/* until next metadata packet */
1848			uint64_t remaining;
1849
1850		✗	if (s->icy_metaint < s->icy_data_read)
1851		✗	return AVERROR_INVALIDDATA;
1852		✗	remaining = s->icy_metaint - s->icy_data_read;
1853
1854		✗	if (!remaining) {
1855			/* The metadata packet is variable sized. It has a 1 byte header
1856			* which sets the length of the packet (divided by 16). If it's 0,
1857			* the metadata doesn't change. After the packet, icy_metaint bytes
1858			* of normal data follows. */
1859			uint8_t ch;
1860		✗	int len = http_read_stream_all(h, &ch, 1);
1861		✗	if (len < 0)
1862		✗	return len;
1863		✗	if (ch > 0) {
1864			char data[255 * 16 + 1];
1865			int ret;
1866		✗	len = ch * 16;
1867		✗	ret = http_read_stream_all(h, data, len);
1868		✗	if (ret < 0)
1869		✗	return ret;
1870		✗	data[len + 1] = 0;
1871		✗	if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1872		✗	return ret;
1873		✗	update_metadata(h, data);
1874			}
1875		✗	s->icy_data_read = 0;
1876		✗	remaining = s->icy_metaint;
1877			}
1878
1879		✗	return FFMIN(size, remaining);
1880			}
1881
1882		✗	static int http_read(URLContext *h, uint8_t *buf, int size)
1883			{
1884		✗	HTTPContext *s = h->priv_data;
1885
1886		✗	if (s->icy_metaint > 0) {
1887		✗	size = store_icy(h, size);
1888		✗	if (size < 0)
1889		✗	return size;
1890			}
1891
1892		✗	size = http_read_stream(h, buf, size);
1893		✗	if (size > 0)
1894		✗	s->icy_data_read += size;
1895		✗	return size;
1896			}
1897
1898			/* used only when posting data */
1899		✗	static int http_write(URLContext *h, const uint8_t *buf, int size)
1900			{
1901		✗	char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1902			int ret;
1903		✗	char crlf[] = "\r\n";
1904		✗	HTTPContext *s = h->priv_data;
1905
1906		✗	if (!s->chunked_post) {
1907			/* non-chunked data is sent without any special encoding */
1908		✗	return ffurl_write(s->hd, buf, size);
1909			}
1910
1911			/* silently ignore zero-size data since chunk encoding that would
1912			* signal EOF */
1913		✗	if (size > 0) {
1914			/* upload data using chunked encoding */
1915		✗	snprintf(temp, sizeof(temp), "%x\r\n", size);
1916
1917		✗	if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1918		✗	(ret = ffurl_write(s->hd, buf, size)) < 0 ||
1919		✗	(ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1920		✗	return ret;
1921			}
1922		✗	return size;
1923			}
1924
1925		✗	static int http_shutdown(URLContext *h, int flags)
1926			{
1927		✗	int ret = 0;
1928		✗	char footer[] = "0\r\n\r\n";
1929		✗	HTTPContext *s = h->priv_data;
1930
1931			/* signal end of chunked encoding if used */
1932		✗	if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1933		✗	((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1934		✗	ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1935		✗	ret = ret > 0 ? 0 : ret;
1936			/* flush the receive buffer when it is write only mode */
1937		✗	if (!(flags & AVIO_FLAG_READ)) {
1938			char buf[1024];
1939			int read_ret;
1940		✗	s->hd->flags |= AVIO_FLAG_NONBLOCK;
1941		✗	read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1942		✗	s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1943		✗	if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1944		✗	av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1945		✗	ret = read_ret;
1946			}
1947			}
1948		✗	s->end_chunked_post = 1;
1949			}
1950
1951		✗	return ret;
1952			}
1953
1954		✗	static int http_close(URLContext *h)
1955			{
1956		✗	int ret = 0;
1957		✗	HTTPContext *s = h->priv_data;
1958
1959			#if CONFIG_ZLIB
1960		✗	inflateEnd(&s->inflate_stream);
1961		✗	av_freep(&s->inflate_buffer);
1962			#endif /* CONFIG_ZLIB */
1963
1964		✗	if (s->hd && !s->end_chunked_post)
1965			/* Close the write direction by sending the end of chunked encoding. */
1966		✗	ret = http_shutdown(h, h->flags);
1967
1968		✗	if (s->hd)
1969		✗	ffurl_closep(&s->hd);
1970		✗	av_dict_free(&s->chained_options);
1971		✗	av_dict_free(&s->cookie_dict);
1972		✗	av_dict_free(&s->redirect_cache);
1973		✗	av_freep(&s->new_location);
1974		✗	av_freep(&s->uri);
1975		✗	return ret;
1976			}
1977
1978		✗	static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1979			{
1980		✗	HTTPContext *s = h->priv_data;
1981		✗	URLContext *old_hd = s->hd;
1982		✗	uint64_t old_off = s->off;
1983			uint8_t old_buf[BUFFER_SIZE];
1984			int old_buf_size, ret;
1985		✗	AVDictionary *options = NULL;
1986
1987		✗	if (whence == AVSEEK_SIZE)
1988		✗	return s->filesize;
1989		✗	else if (!force_reconnect &&
1990		✗	((whence == SEEK_CUR && off == 0) ||
1991		✗	(whence == SEEK_SET && off == s->off)))
1992		✗	return s->off;
1993		✗	else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1994		✗	return AVERROR(ENOSYS);
1995
1996		✗	if (whence == SEEK_CUR)
1997		✗	off += s->off;
1998		✗	else if (whence == SEEK_END)
1999		✗	off += s->filesize;
2000		✗	else if (whence != SEEK_SET)
2001		✗	return AVERROR(EINVAL);
2002		✗	if (off < 0)
2003		✗	return AVERROR(EINVAL);
2004		✗	s->off = off;
2005
2006		✗	if (s->off && h->is_streamed)
2007		✗	return AVERROR(ENOSYS);
2008
2009			/* do not try to make a new connection if seeking past the end of the file */
2010		✗	if (s->end_off || s->filesize != UINT64_MAX) {
2011		✗	uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
2012		✗	if (s->off >= end_pos)
2013		✗	return s->off;
2014			}
2015
2016			/* if the location changed (redirect), revert to the original uri */
2017		✗	if (strcmp(s->uri, s->location)) {
2018			char *new_uri;
2019		✗	new_uri = av_strdup(s->uri);
2020		✗	if (!new_uri)
2021		✗	return AVERROR(ENOMEM);
2022		✗	av_free(s->location);
2023		✗	s->location = new_uri;
2024			}
2025
2026			/* we save the old context in case the seek fails */
2027		✗	old_buf_size = s->buf_end - s->buf_ptr;
2028		✗	memcpy(old_buf, s->buf_ptr, old_buf_size);
2029		✗	s->hd = NULL;
2030
2031			/* if it fails, continue on old connection */
2032		✗	if ((ret = http_open_cnx(h, &options)) < 0) {
2033		✗	av_dict_free(&options);
2034		✗	memcpy(s->buffer, old_buf, old_buf_size);
2035		✗	s->buf_ptr = s->buffer;
2036		✗	s->buf_end = s->buffer + old_buf_size;
2037		✗	s->hd = old_hd;
2038		✗	s->off = old_off;
2039		✗	return ret;
2040			}
2041		✗	av_dict_free(&options);
2042		✗	ffurl_close(old_hd);
2043		✗	return off;
2044			}
2045
2046		✗	static int64_t http_seek(URLContext *h, int64_t off, int whence)
2047			{
2048		✗	return http_seek_internal(h, off, whence, 0);
2049			}
2050
2051		✗	static int http_get_file_handle(URLContext *h)
2052			{
2053		✗	HTTPContext *s = h->priv_data;
2054		✗	return ffurl_get_file_handle(s->hd);
2055			}
2056
2057		✗	static int http_get_short_seek(URLContext *h)
2058			{
2059		✗	HTTPContext *s = h->priv_data;
2060		✗	if (s->short_seek_size >= 1)
2061		✗	return s->short_seek_size;
2062		✗	return ffurl_get_short_seek(s->hd);
2063			}
2064
2065			#define HTTP_CLASS(flavor) \
2066			static const AVClass flavor ## _context_class = { \
2067			.class_name = # flavor, \
2068			.item_name = av_default_item_name, \
2069			.option = options, \
2070			.version = LIBAVUTIL_VERSION_INT, \
2071			}
2072
2073			#if CONFIG_HTTP_PROTOCOL
2074			HTTP_CLASS(http);
2075
2076			const URLProtocol ff_http_protocol = {
2077			.name = "http",
2078			.url_open2 = http_open,
2079			.url_accept = http_accept,
2080			.url_handshake = http_handshake,
2081			.url_read = http_read,
2082			.url_write = http_write,
2083			.url_seek = http_seek,
2084			.url_close = http_close,
2085			.url_get_file_handle = http_get_file_handle,
2086			.url_get_short_seek = http_get_short_seek,
2087			.url_shutdown = http_shutdown,
2088			.priv_data_size = sizeof(HTTPContext),
2089			.priv_data_class = &http_context_class,
2090			.flags = URL_PROTOCOL_FLAG_NETWORK,
2091			.default_whitelist = "http,http,tls,rtp,tcp,udp,crypto,httpproxy,data"
2092			};
2093			#endif /* CONFIG_HTTP_PROTOCOL */
2094
2095			#if CONFIG_HTTPS_PROTOCOL
2096			HTTP_CLASS(http);
2097
2098			const URLProtocol ff_http_protocol = {
2099			.name = "http",
2100			.url_open2 = http_open,
2101			.url_read = http_read,
2102			.url_write = http_write,
2103			.url_seek = http_seek,
2104			.url_close = http_close,
2105			.url_get_file_handle = http_get_file_handle,
2106			.url_get_short_seek = http_get_short_seek,
2107			.url_shutdown = http_shutdown,
2108			.priv_data_size = sizeof(HTTPContext),
2109			.priv_data_class = &http_context_class,
2110			.flags = URL_PROTOCOL_FLAG_NETWORK,
2111			.default_whitelist = "http,http,tls,rtp,tcp,udp,crypto,httpproxy"
2112			};
2113			#endif /* CONFIG_HTTPS_PROTOCOL */
2114
2115			#if CONFIG_HTTPPROXY_PROTOCOL
2116		✗	static int http_proxy_close(URLContext *h)
2117			{
2118		✗	HTTPContext *s = h->priv_data;
2119		✗	if (s->hd)
2120		✗	ffurl_closep(&s->hd);
2121		✗	return 0;
2122			}
2123
2124		✗	static int http_proxy_open(URLContext *h, const char *uri, int flags)
2125			{
2126		✗	HTTPContext *s = h->priv_data;
2127			char hostname[1024], hoststr[1024];
2128			char auth[1024], pathbuf[1024], *path;
2129			char lower_url[100];
2130		✗	int port, ret = 0, auth_attempts = 0;
2131			HTTPAuthType cur_auth_type;
2132			char *authstr;
2133
2134		✗	if( s->seekable == 1 )
2135		✗	h->is_streamed = 0;
2136			else
2137		✗	h->is_streamed = 1;
2138
2139		✗	av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
2140			pathbuf, sizeof(pathbuf), uri);
2141		✗	ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
2142		✗	path = pathbuf;
2143		✗	if (*path == '/')
2144		✗	path++;
2145
2146		✗	ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
2147			NULL);
2148		✗	redo:
2149		✗	ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
2150		✗	&h->interrupt_callback, NULL,
2151			h->protocol_whitelist, h->protocol_blacklist, h);
2152		✗	if (ret < 0)
2153		✗	return ret;
2154
2155		✗	authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
2156			path, "CONNECT");
2157		✗	snprintf(s->buffer, sizeof(s->buffer),
2158			"CONNECT %s HTTP/1.1\r\n"
2159			"Host: %s\r\n"
2160			"Connection: close\r\n"
2161			"%s%s"
2162			"\r\n",
2163			path,
2164			hoststr,
2165		✗	authstr ? "Proxy-" : "", authstr ? authstr : "");
2166		✗	av_freep(&authstr);
2167
2168		✗	if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
2169		✗	goto fail;
2170
2171		✗	s->buf_ptr = s->buffer;
2172		✗	s->buf_end = s->buffer;
2173		✗	s->line_count = 0;
2174		✗	s->filesize = UINT64_MAX;
2175		✗	cur_auth_type = s->proxy_auth_state.auth_type;
2176
2177			/* Note: This uses buffering, potentially reading more than the
2178			* HTTP header. If tunneling a protocol where the server starts
2179			* the conversation, we might buffer part of that here, too.
2180			* Reading that requires using the proper ffurl_read() function
2181			* on this URLContext, not using the fd directly (as the tls
2182			* protocol does). This shouldn't be an issue for tls though,
2183			* since the client starts the conversation there, so there
2184			* is no extra data that we might buffer up here.
2185			*/
2186		✗	ret = http_read_header(h);
2187		✗	if (ret < 0)
2188		✗	goto fail;
2189
2190		✗	auth_attempts++;
2191		✗	if (s->http_code == 407 &&
2192		✗	(cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
2193		✗	s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 2) {
2194		✗	ffurl_closep(&s->hd);
2195		✗	goto redo;
2196			}
2197
2198		✗	if (s->http_code < 400)
2199		✗	return 0;
2200		✗	ret = ff_http_averror(s->http_code, AVERROR(EIO));
2201
2202		✗	fail:
2203		✗	http_proxy_close(h);
2204		✗	return ret;
2205			}
2206
2207		✗	static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
2208			{
2209		✗	HTTPContext *s = h->priv_data;
2210		✗	return ffurl_write(s->hd, buf, size);
2211			}
2212
2213			const URLProtocol ff_httpproxy_protocol = {
2214			.name = "httpproxy",
2215			.url_open = http_proxy_open,
2216			.url_read = http_buf_read,
2217			.url_write = http_proxy_write,
2218			.url_close = http_proxy_close,
2219			.url_get_file_handle = http_get_file_handle,
2220			.priv_data_size = sizeof(HTTPContext),
2221			.flags = URL_PROTOCOL_FLAG_NETWORK,
2222			};
2223			#endif /* CONFIG_HTTPPROXY_PROTOCOL */
2224