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 <string.h>
28			#include <time.h>
29			#if CONFIG_ZLIB
30			#include <zlib.h>
31			#endif /* CONFIG_ZLIB */
32
33			#include "libavutil/avassert.h"
34			#include "libavutil/avstring.h"
35			#include "libavutil/bprint.h"
36			#include "libavutil/getenv_utf8.h"
37			#include "libavutil/macros.h"
38			#include "libavutil/mem.h"
39			#include "libavutil/opt.h"
40			#include "libavutil/time.h"
41			#include "libavutil/parseutils.h"
42
43			#include "avformat.h"
44			#include "http.h"
45			#include "httpauth.h"
46			#include "internal.h"
47			#include "network.h"
48			#include "os_support.h"
49			#include "url.h"
50			#include "version.h"
51
52			/* XXX: POST protocol is not completely implemented because ffmpeg uses
53			* only a subset of it. */
54
55			/* The IO buffer size is unrelated to the max URL size in itself, but needs
56			* to be large enough to fit the full request headers (including long
57			* path names). */
58			#define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)
59			#define MAX_REDIRECTS 8
60			#define MAX_CACHED_REDIRECTS 32
61			#define HTTP_SINGLE 1
62			#define HTTP_MUTLI 2
63			#define MAX_DATE_LEN 19
64			#define WHITESPACES " \n\t\r"
65			typedef enum {
66			LOWER_PROTO,
67			READ_HEADERS,
68			WRITE_REPLY_HEADERS,
69			FINISH
70			}HandshakeState;
71
72			typedef struct HTTPContext {
73			const AVClass *class;
74			unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
75
76			/*************************
77			* Configuration options *
78			*************************/
79			uint64_t off, end_off; /* `off` is also mutated by seeking / reading */
80			char *location;
81			char *http_proxy;
82			char *headers;
83			char *mime_type;
84			char *http_version;
85			char *user_agent;
86			char *referer;
87			char *content_type;
88			int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
89			int chunked_post;
90			int multiple_requests; /**< A flag which indicates if we use persistent connections. */
91			uint8_t *post_data;
92			int post_datalen;
93			char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
94			char *host;
95			int icy;
96			char *icy_metadata_headers;
97			char *icy_metadata_packet;
98			AVDictionary *metadata;
99			/* -1 = try to send if applicable, 0 = always disabled, 1 = always enabled */
100			int send_expect_100;
101			char *method;
102			int reconnect;
103			int reconnect_at_eof;
104			int reconnect_on_network_error;
105			int reconnect_streamed;
106			int reconnect_max_retries;
107			int reconnect_delay_max;
108			int reconnect_delay_total_max;
109			char *reconnect_on_http_error;
110			int listen;
111			char *resource;
112			int reply_code;
113			int short_seek_size;
114			int max_redirects;
115			int respect_retry_after;
116			uint64_t request_size;
117			uint64_t initial_request_size;
118
119			/**********************
120			* Context-wide state *
121			**********************/
122			HTTPAuthState auth_state; /* auth_state.auth_type is also a config option */
123			HTTPAuthState proxy_auth_state;
124			uint64_t filesize;
125			uint64_t oc_filesize; /* Complete size (200 Content-Length or Content-Range total) */
126			int end_of_resource; /* The end of an unknown-size resource was reached */
127			int is_akamai;
128			int is_mediagateway;
129			/* A dictionary containing cookies keyed by cookie name */
130			AVDictionary *cookie_dict;
131			AVDictionary *chained_options;
132			AVDictionary *redirect_cache;
133
134			/* Connection statistics */
135			int nb_connections;
136			int nb_requests;
137			int nb_retries;
138			int nb_reconnects;
139			int nb_redirects;
140			int64_t sum_latency; /* divide by nb_requests */
141			int64_t max_latency;
142
143			/************************
144			* Per-connection state *
145			************************/
146			URLContext *hd;
147			char *uri;
148			char *new_location;
149			int http_code;
150			int64_t expires;
151			/* Used if "Transfer-Encoding: chunked" otherwise -1. */
152			uint64_t chunksize;
153			int chunkend;
154			uint64_t range_end;
155			/* Set if the server correctly handles Connection: close and will close
156			* the connection after feeding us the content. */
157			int willclose;
158			/* A flag which indicates if the end of chunked encoding has been sent. */
159			int end_chunked_post;
160			/* A flag which indicates we have finished to read POST reply. */
161			int end_header;
162			/* how much data was read since the last ICY metadata packet */
163			uint64_t icy_data_read;
164			/* after how many bytes of read data a new metadata packet will be found */
165			uint64_t icy_metaint;
166			#if CONFIG_ZLIB
167			int compressed;
168			z_stream inflate_stream;
169			uint8_t *inflate_buffer;
170			#endif /* CONFIG_ZLIB */
171			unsigned int retry_after;
172			int initial_requests; /* whether or not to limit requests to initial_request_size */
173
174			/* Temporary during header parsing */
175			uint64_t filesize_from_content_range;
176			/* Reply is a partial response with unknown total ("bytes A-B/" + '*'). */
177			int content_range_unknown_size;
178			int line_count;
179
180			/******************
181			* Listener state *
182			******************/
183			/* URLContext *hd; */
184			HandshakeState handshake_step;
185			int is_multi_client;
186			int is_connected_server;
187			} HTTPContext;
188
189			#define OFFSET(x) offsetof(HTTPContext, x)
190			#define D AV_OPT_FLAG_DECODING_PARAM
191			#define E AV_OPT_FLAG_ENCODING_PARAM
192			#define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
193
194			static const AVOption http_options[] = {
195			{ "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D },
196			{ "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
197			{ "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
198			{ "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
199			{ "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
200			{ "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
201			{ "referer", "override referer header", OFFSET(referer), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
202			{ "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D | E },
203			{ "request_size", "size (in bytes) of requests to make", OFFSET(request_size), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
204			{ "initial_request_size", "size (in bytes) of initial requests made during probing / header parsing", OFFSET(initial_request_size), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
205			{ "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
206			{ "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 },
207			{ "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 },
208			{ "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 },
209			{ "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
210			{ "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
211			{ "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
212			{ "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
213			{ "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"},
214			{ "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, .unit = "auth_type"},
215			{ "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, .unit = "auth_type"},
216			{ "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 },
217			{ "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
218			{ "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
219			{ "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 },
220			{ "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 },
221			{ "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
222			{ "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
223			{ "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 },
224			{ "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 },
225			{ "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
226			{ "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 },
227			{ "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 },
228			{ "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 },
229			{ "respect_retry_after", "respect the Retry-After header when retrying connections", OFFSET(respect_retry_after), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
230			{ "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E },
231			{ "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
232			{ "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E},
233			{ "short_seek_size", "Threshold to favor readahead over seek.", OFFSET(short_seek_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
234			{ "max_redirects", "Maximum number of redirects", OFFSET(max_redirects), AV_OPT_TYPE_INT, { .i64 = MAX_REDIRECTS }, 0, INT_MAX, D },
235			{ NULL }
236			};
237
238			static int http_connect(URLContext *h, const char *path, const char *local_path,
239			const char *hoststr, const char *auth,
240			const char *proxyauth);
241			static int http_read_header(URLContext *h);
242			static int bind_cookies_to_host(HTTPContext *s);
243			static int http_shutdown(URLContext *h, int flags);
244
245		✗	void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
246			{
247		✗	memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
248		✗	&((HTTPContext *)src->priv_data)->auth_state,
249			sizeof(HTTPAuthState));
250		✗	memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
251		✗	&((HTTPContext *)src->priv_data)->proxy_auth_state,
252			sizeof(HTTPAuthState));
253		✗	}
254
255		✗	static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
256			{
257		✗	const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
258			char *env_http_proxy, *env_no_proxy;
259			char *hashmark;
260			char hostname[1024], hoststr[1024], proto[10], tmp_host[1024];
261		✗	char auth[1024], proxyauth[1024] = "";
262			char path1[MAX_URL_SIZE], sanitized_path[MAX_URL_SIZE + 1];
263			char buf[1024], urlbuf[MAX_URL_SIZE];
264		✗	int port, use_proxy, err = 0;
265		✗	HTTPContext *s = h->priv_data;
266
267		✗	av_url_split(proto, sizeof(proto), auth, sizeof(auth),
268			hostname, sizeof(hostname), &port,
269		✗	path1, sizeof(path1), s->location);
270
271		✗	av_freep(&s->host);
272		✗	s->host = av_strdup(hostname);
273		✗	if (!s->host)
274		✗	return AVERROR(ENOMEM);
275
276		✗	av_strlcpy(tmp_host, hostname, sizeof(tmp_host));
277			// In case of an IPv6 address, we need to strip the Zone ID,
278			// if any. We do it at the first % sign, as percent encoding
279			// can be used in the Zone ID itself.
280		✗	if (strchr(tmp_host, ':'))
281		✗	tmp_host[strcspn(tmp_host, "%")] = '\0';
282		✗	ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, tmp_host, port, NULL);
283
284		✗	env_http_proxy = getenv_utf8("http_proxy");
285		✗	proxy_path = s->http_proxy ? s->http_proxy : env_http_proxy;
286
287		✗	env_no_proxy = getenv_utf8("no_proxy");
288		✗	use_proxy = !ff_http_match_no_proxy(env_no_proxy, hostname) &&
289		✗	proxy_path && av_strstart(proxy_path, "http://", NULL);
290		✗	freeenv_utf8(env_no_proxy);
291
292		✗	if (h->protocol_whitelist && av_match_list(proto, h->protocol_whitelist, ',') <= 0) {
293		✗	av_log(h, AV_LOG_ERROR, "Protocol '%s' not on whitelist '%s'!\n", proto, h->protocol_whitelist);
294		✗	return AVERROR(EINVAL);
295			}
296
297		✗	if (h->protocol_blacklist && av_match_list(proto, h->protocol_blacklist, ',') > 0) {
298		✗	av_log(h, AV_LOG_ERROR, "Protocol '%s' on blacklist '%s'!\n", proto, h->protocol_blacklist);
299		✗	return AVERROR(EINVAL);
300			}
301
302		✗	if (!strcmp(proto, "https")) {
303		✗	lower_proto = "tls";
304		✗	use_proxy = 0;
305		✗	if (port < 0)
306		✗	port = 443;
307			/* pass http_proxy to underlying protocol */
308		✗	if (s->http_proxy) {
309		✗	err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
310		✗	if (err < 0)
311		✗	goto end;
312			}
313		✗	} else if (strcmp(proto, "http")) {
314		✗	err = AVERROR(EINVAL);
315		✗	goto end;
316			}
317
318		✗	if (port < 0)
319		✗	port = 80;
320
321		✗	hashmark = strchr(path1, '#');
322		✗	if (hashmark)
323		✗	*hashmark = '\0';
324
325		✗	if (path1[0] == '\0') {
326		✗	path = "/";
327		✗	} else if (path1[0] == '?') {
328		✗	snprintf(sanitized_path, sizeof(sanitized_path), "/%s", path1);
329		✗	path = sanitized_path;
330			} else {
331		✗	path = path1;
332			}
333		✗	local_path = path;
334		✗	if (use_proxy) {
335			/* Reassemble the request URL without auth string - we don't
336			* want to leak the auth to the proxy. */
337		✗	ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
338			path1);
339		✗	path = urlbuf;
340		✗	av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
341			hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
342			}
343
344		✗	ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
345
346		✗	if (!s->hd) {
347		✗	s->nb_connections++;
348		✗	err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
349		✗	&h->interrupt_callback, options,
350			h->protocol_whitelist, h->protocol_blacklist, h);
351			}
352
353		✗	end:
354		✗	freeenv_utf8(env_http_proxy);
355		✗	return err < 0 ? err : http_connect(
356			h, path, local_path, hoststr, auth, proxyauth);
357			}
358
359		✗	static int http_should_reconnect(HTTPContext *s, int err)
360			{
361			const char *status_group;
362			char http_code[4];
363
364		✗	switch (err) {
365		✗	case AVERROR_HTTP_BAD_REQUEST:
366			case AVERROR_HTTP_UNAUTHORIZED:
367			case AVERROR_HTTP_FORBIDDEN:
368			case AVERROR_HTTP_NOT_FOUND:
369			case AVERROR_HTTP_TOO_MANY_REQUESTS:
370			case AVERROR_HTTP_OTHER_4XX:
371		✗	status_group = "4xx";
372		✗	break;
373
374		✗	case AVERROR_HTTP_SERVER_ERROR:
375		✗	status_group = "5xx";
376		✗	break;
377
378		✗	default:
379		✗	return s->reconnect_on_network_error;
380			}
381
382		✗	if (!s->reconnect_on_http_error)
383		✗	return 0;
384
385		✗	if (av_match_list(status_group, s->reconnect_on_http_error, ',') > 0)
386		✗	return 1;
387
388		✗	snprintf(http_code, sizeof(http_code), "%d", s->http_code);
389
390		✗	return av_match_list(http_code, s->reconnect_on_http_error, ',') > 0;
391			}
392
393		✗	static char *redirect_cache_get(HTTPContext *s)
394			{
395			AVDictionaryEntry *re;
396			int64_t expiry;
397			char *delim;
398
399		✗	re = av_dict_get(s->redirect_cache, s->location, NULL, AV_DICT_MATCH_CASE);
400		✗	if (!re) {
401		✗	return NULL;
402			}
403
404		✗	delim = strchr(re->value, ';');
405		✗	if (!delim) {
406		✗	return NULL;
407			}
408
409		✗	expiry = strtoll(re->value, NULL, 10);
410		✗	if (time(NULL) > expiry) {
411		✗	return NULL;
412			}
413
414		✗	return delim + 1;
415			}
416
417		✗	static int redirect_cache_set(HTTPContext *s, const char *source, const char *dest, int64_t expiry)
418			{
419			char *value;
420			int ret;
421
422		✗	value = av_asprintf("%"PRIi64";%s", expiry, dest);
423		✗	if (!value) {
424		✗	return AVERROR(ENOMEM);
425			}
426
427		✗	ret = av_dict_set(&s->redirect_cache, source, value, AV_DICT_MATCH_CASE | AV_DICT_DONT_STRDUP_VAL);
428		✗	if (ret < 0)
429		✗	return ret;
430
431		✗	return 0;
432			}
433
434			/* The redirects that http_open_cnx() follows. */
435		✗	static int is_redirect(int http_code)
436			{
437		✗	return http_code == 301 || http_code == 302 || http_code == 303 ||
438		✗	http_code == 307 || http_code == 308;
439			}
440
441			/* A 416 reply for a resource of unknown size marks its end, unless it states
442			* a length past the refused offset. */
443		✗	static int is_end_of_resource(HTTPContext *s, int err, uint64_t off)
444			{
445		✗	return err == AVERROR_HTTP_OTHER_4XX && s->http_code == 416 &&
446		✗	s->oc_filesize == UINT64_MAX &&
447		✗	(s->filesize_from_content_range == UINT64_MAX ||
448		✗	s->filesize_from_content_range <= off);
449			}
450
451			/* Return non zero if error. With end_is_eof, the caller reports the end of a
452			* resource of unknown size as EOF, and the 416 that marks it is retried only
453			* if reconnect_on_http_error lists 416 by number. */
454		✗	static int http_open_cnx(URLContext *h, AVDictionary **options, int end_is_eof)
455			{
456			HTTPAuthType cur_auth_type, cur_proxy_auth_type;
457		✗	HTTPContext *s = h->priv_data;
458		✗	int ret, conn_attempts = 1, auth_attempts = 0, redirects = 0;
459		✗	int reconnect_delay = 0;
460		✗	int reconnect_delay_total = 0;
461		✗	uint64_t off = s->off;
462		✗	uint64_t filesize = s->filesize;
463		✗	uint64_t oc_filesize = s->oc_filesize;
464			char *cached;
465
466		✗	redo:
467			/* every attempt starts with the complete size known before the call */
468		✗	s->oc_filesize = oc_filesize;
469
470		✗	cached = redirect_cache_get(s);
471		✗	if (cached) {
472		✗	if (redirects++ >= s->max_redirects) {
473		✗	ret = AVERROR(EIO);
474		✗	goto fail;
475			}
476
477		✗	av_free(s->location);
478		✗	s->location = av_strdup(cached);
479		✗	if (!s->location) {
480		✗	ret = AVERROR(ENOMEM);
481		✗	goto fail;
482			}
483		✗	goto redo;
484			}
485
486		✗	av_dict_copy(options, s->chained_options, 0);
487
488		✗	cur_auth_type = s->auth_state.auth_type;
489		✗	cur_proxy_auth_type = s->auth_state.auth_type;
490
491		✗	off = s->off;
492		✗	s->http_code = 0;
493		✗	ret = http_open_cnx_internal(h, options);
494		✗	if (ret < 0) {
495		✗	if (!http_should_reconnect(s, ret) ||
496		✗	(end_is_eof && is_end_of_resource(s, ret, off) &&
497		✗	!av_match_list("416", s->reconnect_on_http_error, ',')) ||
498		✗	reconnect_delay > s->reconnect_delay_max ||
499		✗	(s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
500		✗	reconnect_delay_total > s->reconnect_delay_total_max)
501		✗	goto fail;
502
503			/* Both fields here are in seconds. */
504		✗	if (s->respect_retry_after && s->retry_after > 0) {
505		✗	reconnect_delay = s->retry_after;
506		✗	if (reconnect_delay > s->reconnect_delay_max)
507		✗	goto fail;
508		✗	s->retry_after = 0;
509		✗	s->nb_retries++;
510			}
511
512		✗	av_log(h, AV_LOG_WARNING, "Will %s at %"PRIu64" in %d second(s).\n",
513		✗	s->willclose ? "reconnect" : "retry", off, reconnect_delay);
514		✗	ret = ff_network_sleep_interruptible(1000U * 1000 * reconnect_delay, &h->interrupt_callback);
515		✗	if (ret != AVERROR(ETIMEDOUT))
516		✗	goto fail;
517		✗	reconnect_delay_total += reconnect_delay;
518		✗	reconnect_delay = 1 + 2 * reconnect_delay;
519		✗	s->nb_reconnects++;
520		✗	conn_attempts++;
521
522			/* restore the offset (http_connect resets it) */
523		✗	s->off = off;
524
525		✗	ffurl_closep(&s->hd);
526		✗	goto redo;
527			}
528
529		✗	auth_attempts++;
530		✗	if (s->http_code == 401) {
531		✗	if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
532		✗	s->auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
533		✗	ffurl_closep(&s->hd);
534		✗	goto redo;
535			} else
536		✗	goto fail;
537			}
538		✗	if (s->http_code == 407) {
539		✗	if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
540		✗	s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 4) {
541		✗	ffurl_closep(&s->hd);
542		✗	goto redo;
543			} else
544		✗	goto fail;
545			}
546		✗	if (is_redirect(s->http_code) && s->new_location) {
547			/* url moved, get next */
548		✗	ffurl_closep(&s->hd);
549		✗	if (redirects++ >= s->max_redirects) {
550		✗	ret = AVERROR(EIO);
551		✗	goto fail;
552			}
553
554		✗	if (!s->expires) {
555		✗	s->expires = (s->http_code == 301 || s->http_code == 308) ? INT64_MAX : -1;
556			}
557
558		✗	if (s->expires > time(NULL) && av_dict_count(s->redirect_cache) < MAX_CACHED_REDIRECTS) {
559		✗	redirect_cache_set(s, s->location, s->new_location, s->expires);
560			}
561
562		✗	av_free(s->location);
563		✗	s->location = s->new_location;
564		✗	s->new_location = NULL;
565		✗	s->nb_redirects++;
566
567			/* Restart the authentication process with the new target, which
568			* might use a different auth mechanism. */
569		✗	memset(&s->auth_state, 0, sizeof(s->auth_state));
570		✗	auth_attempts = 0;
571		✗	goto redo;
572			}
573		✗	return 0;
574
575		✗	fail:
576		✗	s->off = off;
577		✗	s->filesize = filesize;
578		✗	s->oc_filesize = oc_filesize;
579		✗	if (s->hd)
580		✗	ffurl_closep(&s->hd);
581		✗	if (ret < 0)
582		✗	return ret;
583		✗	return ff_http_averror(s->http_code, AVERROR(EIO));
584			}
585
586		✗	int ff_http_do_new_request(URLContext *h, const char *uri) {
587		✗	return ff_http_do_new_request2(h, uri, NULL);
588			}
589
590		✗	int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
591			{
592		✗	HTTPContext *s = h->priv_data;
593		✗	AVDictionary *options = NULL;
594			int ret;
595			char hostname1[1024], hostname2[1024], proto1[10], proto2[10];
596			int port1, port2;
597
598		✗	if (!h->prot ||
599		✗	!(!strcmp(h->prot->name, "http") ||
600		✗	!strcmp(h->prot->name, "https")))
601		✗	return AVERROR(EINVAL);
602
603		✗	av_url_split(proto1, sizeof(proto1), NULL, 0,
604			hostname1, sizeof(hostname1), &port1,
605		✗	NULL, 0, s->location);
606		✗	av_url_split(proto2, sizeof(proto2), NULL, 0,
607			hostname2, sizeof(hostname2), &port2,
608			NULL, 0, uri);
609		✗	if (strcmp(proto1, proto2) != 0) {
610		✗	av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different protocol %s vs %s\n",
611			proto1, proto2);
612		✗	return AVERROR(EINVAL);
613			}
614		✗	if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
615		✗	av_log(h, AV_LOG_INFO, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
616			hostname1, port1,
617			hostname2, port2
618			);
619		✗	return AVERROR(EINVAL);
620			}
621
622		✗	if (!s->end_chunked_post) {
623		✗	ret = http_shutdown(h, h->flags);
624		✗	if (ret < 0)
625		✗	return ret;
626			}
627
628		✗	if (s->willclose)
629		✗	return AVERROR_EOF;
630
631		✗	s->end_chunked_post = 0;
632		✗	s->chunkend = 0;
633		✗	s->range_end = 0;
634		✗	s->off = 0;
635		✗	s->oc_filesize = UINT64_MAX;
636		✗	s->end_of_resource = 0;
637		✗	s->icy_data_read = 0;
638
639		✗	av_free(s->location);
640		✗	s->location = av_strdup(uri);
641		✗	if (!s->location)
642		✗	return AVERROR(ENOMEM);
643
644		✗	av_free(s->uri);
645		✗	s->uri = av_strdup(uri);
646		✗	if (!s->uri)
647		✗	return AVERROR(ENOMEM);
648
649		✗	if ((ret = av_opt_set_dict(s, opts)) < 0)
650		✗	return ret;
651
652		✗	av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
653		✗	ret = http_open_cnx(h, &options, 0);
654		✗	av_dict_free(&options);
655		✗	return ret;
656			}
657
658		✗	const char* ff_http_get_new_location(URLContext *h)
659			{
660		✗	HTTPContext *s = h->priv_data;
661		✗	return s->new_location;
662			}
663
664		✗	static int http_write_reply(URLContext* h, int status_code)
665			{
666		✗	int ret, body = 0, reply_code, message_len;
667			const char *reply_text, *content_type;
668		✗	HTTPContext *s = h->priv_data;
669			char message[BUFFER_SIZE];
670		✗	content_type = "text/plain";
671
672		✗	if (status_code < 0)
673		✗	body = 1;
674		✗	switch (status_code) {
675		✗	case AVERROR_HTTP_BAD_REQUEST:
676			case 400:
677		✗	reply_code = 400;
678		✗	reply_text = "Bad Request";
679		✗	break;
680		✗	case AVERROR_HTTP_FORBIDDEN:
681			case 403:
682		✗	reply_code = 403;
683		✗	reply_text = "Forbidden";
684		✗	break;
685		✗	case AVERROR_HTTP_NOT_FOUND:
686			case 404:
687		✗	reply_code = 404;
688		✗	reply_text = "Not Found";
689		✗	break;
690		✗	case AVERROR_HTTP_TOO_MANY_REQUESTS:
691			case 429:
692		✗	reply_code = 429;
693		✗	reply_text = "Too Many Requests";
694		✗	break;
695		✗	case 200:
696		✗	reply_code = 200;
697		✗	reply_text = "OK";
698		✗	content_type = s->content_type ? s->content_type : "application/octet-stream";
699		✗	break;
700		✗	case AVERROR_HTTP_SERVER_ERROR:
701			case 500:
702		✗	reply_code = 500;
703		✗	reply_text = "Internal server error";
704		✗	break;
705		✗	default:
706		✗	return AVERROR(EINVAL);
707			}
708		✗	if (body) {
709		✗	s->chunked_post = 0;
710		✗	message_len = snprintf(message, sizeof(message),
711			"HTTP/1.1 %03d %s\r\n"
712			"Content-Type: %s\r\n"
713			"Content-Length: %zu\r\n"
714			"%s"
715			"\r\n"
716			"%03d %s\r\n",
717			reply_code,
718			reply_text,
719			content_type,
720		✗	strlen(reply_text) + 6, // 3 digit status code + space + \r\n
721		✗	s->headers ? s->headers : "",
722			reply_code,
723			reply_text);
724			} else {
725		✗	s->chunked_post = 1;
726		✗	message_len = snprintf(message, sizeof(message),
727			"HTTP/1.1 %03d %s\r\n"
728			"Content-Type: %s\r\n"
729			"Transfer-Encoding: chunked\r\n"
730			"%s"
731			"\r\n",
732			reply_code,
733			reply_text,
734			content_type,
735		✗	s->headers ? s->headers : "");
736			}
737		✗	av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
738		✗	if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
739		✗	return ret;
740		✗	return 0;
741			}
742
743		✗	static void handle_http_errors(URLContext *h, int error)
744			{
745		✗	av_assert0(error < 0);
746		✗	http_write_reply(h, error);
747		✗	}
748
749		✗	static int http_handshake(URLContext *c)
750			{
751			int ret, err;
752		✗	HTTPContext *ch = c->priv_data;
753		✗	URLContext *cl = ch->hd;
754		✗	switch (ch->handshake_step) {
755		✗	case LOWER_PROTO:
756		✗	av_log(c, AV_LOG_TRACE, "Lower protocol\n");
757		✗	if ((ret = ffurl_handshake(cl)) > 0)
758		✗	return 2 + ret;
759		✗	if (ret < 0)
760		✗	return ret;
761		✗	ch->handshake_step = READ_HEADERS;
762		✗	ch->is_connected_server = 1;
763		✗	return 2;
764		✗	case READ_HEADERS:
765		✗	av_log(c, AV_LOG_TRACE, "Read headers\n");
766		✗	if ((err = http_read_header(c)) < 0) {
767		✗	handle_http_errors(c, err);
768		✗	return err;
769			}
770		✗	ch->handshake_step = WRITE_REPLY_HEADERS;
771		✗	return 1;
772		✗	case WRITE_REPLY_HEADERS:
773		✗	av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
774		✗	if ((err = http_write_reply(c, ch->reply_code)) < 0)
775		✗	return err;
776		✗	ch->handshake_step = FINISH;
777		✗	return 1;
778		✗	case FINISH:
779		✗	return 0;
780			}
781			// this should never be reached.
782		✗	return AVERROR(EINVAL);
783			}
784
785		✗	static int http_listen(URLContext *h, const char *uri, int flags,
786			AVDictionary **options) {
787		✗	HTTPContext *s = h->priv_data;
788			int ret;
789			char hostname[1024], proto[10];
790			char lower_url[100];
791		✗	const char *lower_proto = "tcp";
792			int port;
793		✗	av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
794			NULL, 0, uri);
795		✗	if (!strcmp(proto, "https"))
796		✗	lower_proto = "tls";
797		✗	ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
798			NULL);
799		✗	if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
800		✗	goto fail;
801		✗	if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
802		✗	&h->interrupt_callback, options,
803			h->protocol_whitelist, h->protocol_blacklist, h
804			)) < 0)
805		✗	goto fail;
806		✗	s->handshake_step = LOWER_PROTO;
807		✗	if (s->listen == HTTP_SINGLE) { /* single client */
808		✗	s->reply_code = 200;
809		✗	while ((ret = http_handshake(h)) > 0);
810			}
811		✗	fail:
812		✗	av_dict_free(&s->chained_options);
813		✗	av_dict_free(&s->cookie_dict);
814		✗	return ret;
815			}
816
817		✗	static int http_open(URLContext *h, const char *uri, int flags,
818			AVDictionary **options)
819			{
820		✗	HTTPContext *s = h->priv_data;
821			int ret;
822
823		✗	if( s->seekable == 1 )
824		✗	h->is_streamed = 0;
825			else
826		✗	h->is_streamed = 1;
827
828		✗	s->initial_requests = s->seekable != 0 && s->initial_request_size > 0;
829		✗	s->filesize = UINT64_MAX;
830		✗	s->oc_filesize = UINT64_MAX;
831		✗	s->end_of_resource = 0;
832
833		✗	s->location = av_strdup(uri);
834		✗	if (!s->location)
835		✗	return AVERROR(ENOMEM);
836
837		✗	s->uri = av_strdup(uri);
838		✗	if (!s->uri)
839		✗	return AVERROR(ENOMEM);
840
841		✗	if (s->cookies && (ret = bind_cookies_to_host(s)) < 0)
842		✗	goto bail_out;
843
844		✗	if (options)
845		✗	av_dict_copy(&s->chained_options, *options, 0);
846
847		✗	if (s->headers) {
848		✗	int len = strlen(s->headers);
849		✗	if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
850		✗	av_log(h, AV_LOG_WARNING,
851			"No trailing CRLF found in HTTP header. Adding it.\n");
852		✗	ret = av_reallocp(&s->headers, len + 3);
853		✗	if (ret < 0)
854		✗	goto bail_out;
855		✗	s->headers[len] = '\r';
856		✗	s->headers[len + 1] = '\n';
857		✗	s->headers[len + 2] = '\0';
858			}
859			}
860
861		✗	if (s->listen) {
862		✗	return http_listen(h, uri, flags, options);
863			}
864		✗	ret = http_open_cnx(h, options, 0);
865		✗	bail_out:
866		✗	if (ret < 0) {
867		✗	av_dict_free(&s->chained_options);
868		✗	av_dict_free(&s->cookie_dict);
869		✗	av_dict_free(&s->redirect_cache);
870		✗	av_freep(&s->new_location);
871		✗	av_freep(&s->uri);
872		✗	av_freep(&s->host);
873			}
874		✗	return ret;
875			}
876
877		✗	static int http_accept(URLContext *s, URLContext **c)
878			{
879			int ret;
880		✗	HTTPContext *sc = s->priv_data;
881			HTTPContext *cc;
882		✗	URLContext *sl = sc->hd;
883		✗	URLContext *cl = NULL;
884
885		✗	av_assert0(sc->listen);
886		✗	if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
887		✗	goto fail;
888		✗	cc = (*c)->priv_data;
889		✗	if ((ret = ffurl_accept(sl, &cl)) < 0)
890		✗	goto fail;
891		✗	cc->hd = cl;
892		✗	cc->is_multi_client = 1;
893		✗	return 0;
894		✗	fail:
895		✗	if (c) {
896		✗	ffurl_closep(c);
897			}
898		✗	return ret;
899			}
900
901		✗	static int http_getc(HTTPContext *s)
902			{
903			int len;
904		✗	if (s->buf_ptr >= s->buf_end) {
905		✗	len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
906		✗	if (len < 0) {
907		✗	return len;
908		✗	} else if (len == 0) {
909		✗	return AVERROR_EOF;
910			} else {
911		✗	s->buf_ptr = s->buffer;
912		✗	s->buf_end = s->buffer + len;
913			}
914			}
915		✗	return *s->buf_ptr++;
916			}
917
918		✗	static int http_get_line(HTTPContext *s, char *line, int line_size)
919			{
920			int ch;
921			char *q;
922
923		✗	q = line;
924			for (;;) {
925		✗	ch = http_getc(s);
926		✗	if (ch < 0)
927		✗	return ch;
928		✗	if (ch == '\n') {
929			/* process line */
930		✗	if (q > line && q[-1] == '\r')
931		✗	q--;
932		✗	*q = '\0';
933
934		✗	return 0;
935			} else {
936		✗	if ((q - line) < line_size - 1)
937		✗	*q++ = ch;
938			}
939			}
940			}
941
942		22	int ff_http_parse_status_line(void *logctx, const char *line, HTTPStatusLine *st)
943			{
944			const char *p;
945
946		22	memset(st, 0, sizeof(*st));
947
948	2/2 ✓ Branch 1 taken 15 times. ✓ Branch 2 taken 7 times.	22	if (!av_strstart(line, "HTTP/", &p) ||
949	4/6 ✓ Branch 0 taken 14 times. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 14 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 14 times. ✗ Branch 5 not taken.	15	!av_isdigit(p[0]) || p[1] != '.' || !av_isdigit(p[2]) ||
950	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 13 times.	14	!av_isspace(p[3])) {
951		9	av_log(logctx, AV_LOG_ERROR, "Malformed HTTP status line.\n");
952		9	return AVERROR_INVALIDDATA;
953			}
954
955		13	av_strlcpy(st->version, p, sizeof(st->version));
956		13	st->willclose = !strcmp(st->version, "1.0");
957
958		13	p += 3;
959	2/2 ✓ Branch 0 taken 13 times. ✓ Branch 1 taken 13 times.	26	while (av_isspace(*p))
960		13	p++;
961
962			/* RFC 9112 mandates a space after the code, but a bare "HTTP/1.1 200"
963			* is common enough in the wild to be worth accepting. */
964	5/6 ✓ Branch 0 taken 11 times. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 11 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 10 times. ✓ Branch 5 taken 1 times.	13	if (!av_isdigit(p[0]) || !av_isdigit(p[1]) || !av_isdigit(p[2]) ||
965	4/4 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 2 times. ✓ Branch 3 taken 7 times.	10	(p[3] && !av_isspace(p[3]))) {
966		5	av_log(logctx, AV_LOG_ERROR, "Malformed HTTP status code.\n");
967		5	return AVERROR_INVALIDDATA;
968			}
969
970		8	st->code = 100 * (p[0] - '0') + 10 * (p[1] - '0') + p[2] - '0';
971	4/4 ✓ Branch 0 taken 7 times. ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 1 times. ✓ Branch 3 taken 6 times.	8	if (st->code < 100 || st->code > 599) {
972		2	av_log(logctx, AV_LOG_ERROR, "HTTP status code %d out of range.\n",
973			st->code);
974		2	return AVERROR_INVALIDDATA;
975			}
976		6	p += 3;
977	2/2 ✓ Branch 0 taken 5 times. ✓ Branch 1 taken 6 times.	11	while (av_isspace(*p))
978		5	p++;
979		6	st->reason = p;
980
981		6	av_log(logctx, AV_LOG_TRACE, "http_code=%d\n", st->code);
982
983		6	return 0;
984			}
985
986		✗	static int check_http_code(URLContext *h, int http_code, const char *end)
987			{
988		✗	HTTPContext *s = h->priv_data;
989			/* error codes are 4xx and 5xx, but regard 401 as a success, so we
990			* don't abort until all headers have been parsed. */
991		✗	if (http_code >= 400 && http_code < 600 &&
992		✗	(http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
993		✗	(http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
994		✗	av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
995		✗	return ff_http_averror(http_code, AVERROR(EIO));
996			}
997		✗	return 0;
998			}
999
1000		✗	static int parse_location(HTTPContext *s, const char *p)
1001			{
1002			char redirected_location[MAX_URL_SIZE];
1003		✗	ff_make_absolute_url(redirected_location, sizeof(redirected_location),
1004		✗	s->location, p);
1005		✗	av_freep(&s->new_location);
1006		✗	s->new_location = av_strdup(redirected_location);
1007		✗	if (!s->new_location)
1008		✗	return AVERROR(ENOMEM);
1009		✗	return 0;
1010			}
1011
1012			/* "bytes $from-$to/$document_size" */
1013		✗	static int parse_content_range(URLContext *h, const char *p)
1014			{
1015		✗	HTTPContext *s = h->priv_data;
1016			const char *slash, *end;
1017
1018		✗	if (!strncmp(p, "bytes ", 6)) {
1019		✗	p += 6;
1020		✗	s->off = strtoull(p, NULL, 10);
1021		✗	s->range_end = 0;
1022		✗	if ((end = strchr(p, '-')) && strlen(end) > 0) {
1023		✗	s->range_end = strtoull(end + 1, NULL, 10) + 1;
1024		✗	if (s->range_end <= s->off) {
1025		✗	av_log(h, AV_LOG_ERROR, "Invalid Content-Range: end %"PRIu64" before start %"PRIu64"\n",
1026		✗	s->range_end - 1, s->off);
1027		✗	return AVERROR_INVALIDDATA;
1028			}
1029			}
1030		✗	if ((slash = strchr(p, '/')) && strlen(slash) > 0) {
1031		✗	if (av_isdigit(slash[1]))
1032		✗	s->filesize_from_content_range = strtoull(slash + 1, NULL, 10);
1033			else
1034		✗	s->content_range_unknown_size = 1; /* unknown total size */
1035			}
1036			}
1037		✗	if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
1038		✗	h->is_streamed = 0; /* we _can_ in fact seek */
1039		✗	return 0;
1040			}
1041
1042		✗	static int parse_content_encoding(URLContext *h, const char *p)
1043			{
1044		✗	if (!av_strncasecmp(p, "gzip", 4) ||
1045		✗	!av_strncasecmp(p, "deflate", 7)) {
1046			#if CONFIG_ZLIB
1047		✗	HTTPContext *s = h->priv_data;
1048
1049		✗	s->compressed = 1;
1050		✗	inflateEnd(&s->inflate_stream);
1051		✗	if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
1052		✗	av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
1053			s->inflate_stream.msg);
1054		✗	return AVERROR(ENOSYS);
1055			}
1056		✗	if (zlibCompileFlags() & (1 << 17)) {
1057		✗	av_log(h, AV_LOG_WARNING,
1058			"Your zlib was compiled without gzip support.\n");
1059		✗	return AVERROR(ENOSYS);
1060			}
1061			#else
1062			av_log(h, AV_LOG_WARNING,
1063			"Compressed (%s) content, need zlib with gzip support\n", p);
1064			return AVERROR(ENOSYS);
1065			#endif /* CONFIG_ZLIB */
1066		✗	} else if (!av_strncasecmp(p, "identity", 8)) {
1067			// The normal, no-encoding case (although servers shouldn't include
1068			// the header at all if this is the case).
1069			} else {
1070		✗	av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
1071			}
1072		✗	return 0;
1073			}
1074
1075			// Concat all Icy- header lines
1076		✗	static int parse_icy(HTTPContext *s, const char *tag, const char *p)
1077			{
1078		✗	int len = 4 + strlen(p) + strlen(tag);
1079		✗	int is_first = !s->icy_metadata_headers;
1080			int ret;
1081
1082		✗	av_dict_set(&s->metadata, tag, p, 0);
1083
1084		✗	if (s->icy_metadata_headers)
1085		✗	len += strlen(s->icy_metadata_headers);
1086
1087		✗	if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
1088		✗	return ret;
1089
1090		✗	if (is_first)
1091		✗	*s->icy_metadata_headers = '\0';
1092
1093		✗	av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
1094
1095		✗	return 0;
1096			}
1097
1098		✗	static int parse_http_date(const char *date_str, struct tm *buf)
1099			{
1100			char date_buf[MAX_DATE_LEN];
1101		✗	int i, j, date_buf_len = MAX_DATE_LEN-1;
1102			char *date;
1103
1104			// strip off any punctuation or whitespace
1105		✗	for (i = 0, j = 0; date_str[i] != '\0' && j < date_buf_len; i++) {
1106		✗	if ((date_str[i] >= '0' && date_str[i] <= '9') ||
1107		✗	(date_str[i] >= 'A' && date_str[i] <= 'Z') ||
1108		✗	(date_str[i] >= 'a' && date_str[i] <= 'z')) {
1109		✗	date_buf[j] = date_str[i];
1110		✗	j++;
1111			}
1112			}
1113		✗	date_buf[j] = '\0';
1114		✗	date = date_buf;
1115
1116			// move the string beyond the day of week
1117		✗	while ((*date < '0' || *date > '9') && *date != '\0')
1118		✗	date++;
1119
1120		✗	return av_small_strptime(date, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
1121			}
1122
1123		✗	static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
1124			{
1125			char *param, *next_param, *cstr, *back;
1126		✗	char *saveptr = NULL;
1127
1128		✗	if (!set_cookie[0])
1129		✗	return 0;
1130
1131		✗	if (!(cstr = av_strdup(set_cookie)))
1132		✗	return AVERROR(EINVAL);
1133
1134			// strip any trailing whitespace
1135		✗	back = &cstr[strlen(cstr)-1];
1136		✗	while (strchr(WHITESPACES, *back)) {
1137		✗	*back='\0';
1138		✗	if (back == cstr)
1139		✗	break;
1140		✗	back--;
1141			}
1142
1143		✗	next_param = cstr;
1144		✗	while ((param = av_strtok(next_param, ";", &saveptr))) {
1145			char *name, *value;
1146		✗	next_param = NULL;
1147		✗	param += strspn(param, WHITESPACES);
1148		✗	if ((name = av_strtok(param, "=", &value))) {
1149		✗	char *end = name + strlen(name);
1150		✗	while (end > name && strchr(WHITESPACES, end[-1]))
1151		✗	*--end = '\0';
1152		✗	if (av_dict_set(dict, name, value ? value : "", 0) < 0) {
1153		✗	av_free(cstr);
1154		✗	return -1;
1155			}
1156			}
1157			}
1158
1159		✗	av_free(cstr);
1160		✗	return 0;
1161			}
1162
1163		✗	static const char *cookie_domain(const AVDictionary *cookie_params)
1164			{
1165		✗	const AVDictionaryEntry *e = av_dict_get(cookie_params, "domain", NULL, 0);
1166		✗	const char *domain = e ? e->value + (e->value[0] == '.') : "";
1167
1168		✗	return *domain ? domain : NULL;
1169			}
1170
1171		✗	static int host_is_ip_literal(const char *host)
1172			{
1173		✗	return !host[strspn(host, "0123456789.")] || strchr(host, ':');
1174			}
1175
1176		✗	static int host_in_cookie_domain(const char *host, const char *domain)
1177			{
1178		✗	int offset = strlen(host) - strlen(domain);
1179
1180		✗	return offset >= 0 && !av_strcasecmp(host + offset, domain) &&
1181		✗	(!offset || (host[offset - 1] == '.' && !host_is_ip_literal(host)));
1182			}
1183
1184		✗	static int parse_cookie(HTTPContext *s, const char *p, const char *host,
1185			AVDictionary **cookies)
1186			{
1187		✗	AVDictionary *new_params = NULL;
1188			const AVDictionaryEntry *e, *cookie_entry;
1189			const char *eql;
1190			char *name, *value;
1191			int len;
1192
1193			// ensure the cookie is parsable
1194		✗	if (parse_set_cookie(p, &new_params)) {
1195		✗	av_dict_free(&new_params);
1196		✗	return -1;
1197			}
1198
1199			// if there is no cookie value there is nothing to parse
1200		✗	cookie_entry = av_dict_iterate(new_params, NULL);
1201		✗	if (!cookie_entry || !cookie_entry->value) {
1202		✗	av_dict_free(&new_params);
1203		✗	return -1;
1204			}
1205
1206			// ensure the cookie is not expired or older than an existing value
1207		✗	if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
1208		✗	struct tm new_tm = {0};
1209		✗	if (!parse_http_date(e->value, &new_tm)) {
1210			AVDictionaryEntry *e2;
1211
1212			// if the cookie has already expired ignore it
1213		✗	if (av_timegm(&new_tm) < av_gettime() / 1000000) {
1214		✗	av_dict_free(&new_params);
1215		✗	return 0;
1216			}
1217
1218			// only replace an older cookie with the same name
1219		✗	e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
1220		✗	if (e2 && e2->value) {
1221		✗	AVDictionary *old_params = NULL;
1222		✗	if (!parse_set_cookie(p, &old_params)) {
1223		✗	e2 = av_dict_get(old_params, "expires", NULL, 0);
1224		✗	if (e2 && e2->value) {
1225		✗	struct tm old_tm = {0};
1226		✗	if (!parse_http_date(e->value, &old_tm)) {
1227		✗	if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
1228		✗	av_dict_free(&new_params);
1229		✗	av_dict_free(&old_params);
1230		✗	return -1;
1231			}
1232			}
1233			}
1234			}
1235		✗	av_dict_free(&old_params);
1236			}
1237			}
1238			}
1239		✗	const char *domain = host ? cookie_domain(new_params) : NULL;
1240		✗	int host_only = host && !domain;
1241		✗	if (domain && !host_in_cookie_domain(host, domain)) {
1242		✗	av_log(s, AV_LOG_WARNING, "Ignoring cookie for domain %s set by %s\n", domain, host);
1243		✗	av_dict_free(&new_params);
1244		✗	return 0;
1245			}
1246		✗	av_dict_free(&new_params);
1247
1248			// duplicate the cookie name (dict will dupe the value)
1249		✗	if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
1250		✗	if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
1251
1252			// add the cookie to the dictionary
1253		✗	len = strlen(eql);
1254		✗	while (len && strchr(WHITESPACES, eql[len - 1]))
1255		✗	len--;
1256		✗	value = av_asprintf("%.*s%s%s", len, eql, host_only ? "; @hostonly=" : "", host_only ? host : "");
1257		✗	if (!value) {
1258		✗	av_free(name);
1259		✗	return AVERROR(ENOMEM);
1260			}
1261		✗	av_dict_set(cookies, name, value, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
1262
1263		✗	return 0;
1264			}
1265
1266			/* Cookies without a Domain apply only to the host they are given for. */
1267		✗	static int bind_cookies_to_host(HTTPContext *s)
1268			{
1269		✗	char host[1024], *cookies, *cookie, *next, *saveptr = NULL, *bound;
1270			AVBPrint bp;
1271		✗	int ret = 0;
1272
1273		✗	av_url_split(NULL, 0, NULL, 0, host, sizeof(host), NULL, NULL, 0, s->location);
1274
1275		✗	next = cookies = av_strdup(s->cookies);
1276		✗	if (!cookies)
1277		✗	return AVERROR(ENOMEM);
1278
1279		✗	av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
1280		✗	while ((cookie = av_strtok(next, "\n", &saveptr))) {
1281		✗	AVDictionary *params = NULL;
1282		✗	int len = strlen(cookie), host_only;
1283
1284		✗	next = NULL;
1285		✗	while (len && strchr(WHITESPACES, cookie[len - 1]))
1286		✗	len--;
1287		✗	if ((ret = parse_set_cookie(cookie, &params)) < 0) {
1288		✗	av_dict_free(&params);
1289		✗	break;
1290			}
1291		✗	host_only = !cookie_domain(params) && !av_dict_get(params, "@hostonly", NULL, 0);
1292		✗	av_dict_free(&params);
1293		✗	av_bprintf(&bp, "%.*s%s%s\n", len, cookie, host_only ? "; @hostonly=" : "", host_only ? host : "");
1294			}
1295		✗	av_free(cookies);
1296		✗	if (ret >= 0 && !av_bprint_is_complete(&bp))
1297		✗	ret = AVERROR(ENOMEM);
1298		✗	if (ret < 0) {
1299		✗	av_bprint_finalize(&bp, NULL);
1300		✗	return ret;
1301			}
1302		✗	if ((ret = av_bprint_finalize(&bp, &bound)) < 0)
1303		✗	return ret;
1304		✗	av_free(s->cookies);
1305		✗	s->cookies = bound;
1306		✗	return 0;
1307			}
1308
1309		✗	static int cookie_string(AVDictionary *dict, char **cookies)
1310			{
1311		✗	const AVDictionaryEntry *e = NULL;
1312		✗	int len = 1;
1313
1314			// determine how much memory is needed for the cookies string
1315		✗	while ((e = av_dict_iterate(dict, e)))
1316		✗	len += strlen(e->key) + strlen(e->value) + 1;
1317
1318			// reallocate the cookies
1319		✗	e = NULL;
1320		✗	if (*cookies) av_free(*cookies);
1321		✗	*cookies = av_malloc(len);
1322		✗	if (!*cookies) return AVERROR(ENOMEM);
1323		✗	*cookies[0] = '\0';
1324
1325			// write out the cookies
1326		✗	while ((e = av_dict_iterate(dict, e)))
1327		✗	av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
1328
1329		✗	return 0;
1330			}
1331
1332		✗	static void parse_expires(HTTPContext *s, const char *p)
1333			{
1334			struct tm tm;
1335
1336		✗	if (!parse_http_date(p, &tm)) {
1337		✗	s->expires = av_timegm(&tm);
1338			}
1339		✗	}
1340
1341		✗	static void parse_cache_control(HTTPContext *s, const char *p)
1342			{
1343			char *age;
1344			int offset;
1345
1346			/* give 'Expires' higher priority over 'Cache-Control' */
1347		✗	if (s->expires) {
1348		✗	return;
1349			}
1350
1351		✗	if (av_stristr(p, "no-cache") || av_stristr(p, "no-store")) {
1352		✗	s->expires = -1;
1353		✗	return;
1354			}
1355
1356		✗	age = av_stristr(p, "s-maxage=");
1357		✗	offset = 9;
1358		✗	if (!age) {
1359		✗	age = av_stristr(p, "max-age=");
1360		✗	offset = 8;
1361			}
1362
1363		✗	if (age) {
1364		✗	s->expires = time(NULL) + atoi(age + offset);
1365			}
1366			}
1367
1368		✗	static int process_line(URLContext *h, char *line, int line_count, int *parsed_http_code)
1369			{
1370		✗	HTTPContext *s = h->priv_data;
1371		✗	const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
1372			char *tag, *p, *method, *resource, *version;
1373			int ret;
1374
1375			/* end of header */
1376		✗	if (line[0] == '\0') {
1377		✗	s->end_header = 1;
1378		✗	return 0;
1379			}
1380
1381		✗	p = line;
1382		✗	if (line_count == 0) {
1383		✗	if (s->is_connected_server) {
1384			// HTTP method
1385		✗	method = p;
1386		✗	while (*p && !av_isspace(*p))
1387		✗	p++;
1388		✗	if (!av_isspace(*p))
1389		✗	return AVERROR_HTTP_BAD_REQUEST;
1390		✗	*(p++) = '\0';
1391		✗	av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
1392		✗	if (s->method) {
1393		✗	if (av_strcasecmp(s->method, method)) {
1394		✗	av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
1395			s->method, method);
1396		✗	return AVERROR_HTTP_BAD_REQUEST;
1397			}
1398			} else {
1399			// use autodetected HTTP method to expect
1400		✗	av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1401		✗	if (av_strcasecmp(auto_method, method)) {
1402		✗	av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1403			"(%s autodetected %s received)\n", auto_method, method);
1404		✗	return AVERROR_HTTP_BAD_REQUEST;
1405			}
1406		✗	if (!(s->method = av_strdup(method)))
1407		✗	return AVERROR(ENOMEM);
1408			}
1409
1410			// HTTP resource
1411		✗	while (av_isspace(*p))
1412		✗	p++;
1413		✗	resource = p;
1414		✗	while (*p && !av_isspace(*p))
1415		✗	p++;
1416		✗	if (!av_isspace(*p))
1417		✗	return AVERROR_HTTP_BAD_REQUEST;
1418		✗	*(p++) = '\0';
1419		✗	av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1420		✗	if (!(s->resource = av_strdup(resource)))
1421		✗	return AVERROR(ENOMEM);
1422
1423			// HTTP version
1424		✗	while (av_isspace(*p))
1425		✗	p++;
1426		✗	version = p;
1427		✗	while (*p && !av_isspace(*p))
1428		✗	p++;
1429		✗	*p = '\0';
1430		✗	if (av_strncasecmp(version, "HTTP/", 5)) {
1431		✗	av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1432		✗	return AVERROR_HTTP_BAD_REQUEST;
1433			}
1434		✗	av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1435			} else {
1436			HTTPStatusLine st;
1437
1438		✗	if ((ret = ff_http_parse_status_line(h, p, &st)) < 0)
1439		✗	return ret;
1440
1441			/* Only ever set: a keep-alive decision made earlier must survive. */
1442		✗	if (st.willclose)
1443		✗	s->willclose = 1;
1444
1445		✗	av_freep(&s->http_version);
1446		✗	if (!(s->http_version = av_strdup(st.version)))
1447		✗	return AVERROR(ENOMEM);
1448
1449		✗	s->http_code = st.code;
1450
1451		✗	*parsed_http_code = 1;
1452
1453		✗	if ((ret = check_http_code(h, s->http_code, st.reason)) < 0)
1454		✗	return ret;
1455			}
1456			} else {
1457		✗	while (*p != '\0' && *p != ':')
1458		✗	p++;
1459		✗	if (*p != ':')
1460		✗	return 1;
1461
1462		✗	*p = '\0';
1463		✗	tag = line;
1464		✗	p++;
1465		✗	while (av_isspace(*p))
1466		✗	p++;
1467		✗	if (!av_strcasecmp(tag, "Location")) {
1468		✗	if ((ret = parse_location(s, p)) < 0)
1469		✗	return ret;
1470		✗	} else if (!av_strcasecmp(tag, "Content-Length") &&
1471		✗	s->filesize == UINT64_MAX) {
1472		✗	s->filesize = strtoull(p, NULL, 10);
1473		✗	} else if (!av_strcasecmp(tag, "Content-Range")) {
1474		✗	if ((ret = parse_content_range(h, p)) < 0)
1475		✗	return ret;
1476		✗	} else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1477		✗	!strncmp(p, "bytes", 5) &&
1478		✗	s->seekable == -1) {
1479		✗	h->is_streamed = 0;
1480		✗	} else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1481		✗	!av_strncasecmp(p, "chunked", 7)) {
1482		✗	s->filesize = UINT64_MAX;
1483		✗	s->chunksize = 0;
1484		✗	} else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1485		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1486		✗	} else if (!av_strcasecmp(tag, "Authentication-Info")) {
1487		✗	ff_http_auth_handle_header(&s->auth_state, tag, p);
1488		✗	} else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1489		✗	ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1490		✗	} else if (!av_strcasecmp(tag, "Connection")) {
1491		✗	if (!av_strcasecmp(p, "close"))
1492		✗	s->willclose = 1;
1493		✗	} else if (!av_strcasecmp(tag, "Server")) {
1494		✗	if (!av_strcasecmp(p, "AkamaiGHost")) {
1495		✗	s->is_akamai = 1;
1496		✗	} else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1497		✗	s->is_mediagateway = 1;
1498			}
1499		✗	} else if (!av_strcasecmp(tag, "Content-Type")) {
1500		✗	av_free(s->mime_type);
1501		✗	s->mime_type = av_get_token((const char **)&p, ";");
1502		✗	} else if (!av_strcasecmp(tag, "Set-Cookie")) {
1503		✗	if (parse_cookie(s, p, s->host, &s->cookie_dict))
1504		✗	av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1505		✗	} else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1506		✗	s->icy_metaint = strtoull(p, NULL, 10);
1507		✗	} else if (!av_strncasecmp(tag, "Icy-", 4)) {
1508		✗	if ((ret = parse_icy(s, tag, p)) < 0)
1509		✗	return ret;
1510		✗	} else if (!av_strcasecmp(tag, "Content-Encoding")) {
1511		✗	if ((ret = parse_content_encoding(h, p)) < 0)
1512		✗	return ret;
1513		✗	} else if (!av_strcasecmp(tag, "Expires")) {
1514		✗	parse_expires(s, p);
1515		✗	} else if (!av_strcasecmp(tag, "Cache-Control")) {
1516		✗	parse_cache_control(s, p);
1517		✗	} else if (!av_strcasecmp(tag, "Retry-After")) {
1518			/* The header can be either an integer that represents seconds, or a date. */
1519			struct tm tm;
1520		✗	int date_ret = parse_http_date(p, &tm);
1521		✗	if (!date_ret) {
1522		✗	time_t retry = av_timegm(&tm);
1523		✗	int64_t now = av_gettime() / 1000000;
1524		✗	int64_t diff = ((int64_t) retry) - now;
1525		✗	s->retry_after = (unsigned int) FFMAX(0, diff);
1526			} else {
1527		✗	s->retry_after = strtoul(p, NULL, 10);
1528			}
1529			}
1530			}
1531		✗	return 1;
1532			}
1533
1534			/**
1535			* Create a string containing cookie values for use as a HTTP cookie header
1536			* field value for a particular path and domain from the cookie values stored in
1537			* the HTTP protocol context. The cookie string is stored in *cookies, and may
1538			* be NULL if there are no valid cookies.
1539			*
1540			* @return a negative value if an error condition occurred, 0 otherwise
1541			*/
1542		✗	static int get_cookies(HTTPContext *s, char **cookies, const char *path)
1543			{
1544			// cookie strings will look like Set-Cookie header field values. Multiple
1545			// Set-Cookie fields will result in multiple values delimited by a newline
1546		✗	int ret = 0;
1547			char *cookie, *set_cookies, *next;
1548		✗	char *saveptr = NULL;
1549
1550			// destroy any cookies in the dictionary.
1551		✗	av_dict_free(&s->cookie_dict);
1552
1553		✗	if (!s->cookies)
1554		✗	return 0;
1555
1556		✗	next = set_cookies = av_strdup(s->cookies);
1557		✗	if (!next)
1558		✗	return AVERROR(ENOMEM);
1559
1560		✗	*cookies = NULL;
1561		✗	while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1562		✗	AVDictionary *cookie_params = NULL;
1563			const AVDictionaryEntry *cookie_entry, *e;
1564			const char *domain, *eql;
1565
1566		✗	next = NULL;
1567			// store the cookie in a dict in case it is updated in the response
1568		✗	if (parse_cookie(s, cookie, NULL, &s->cookie_dict))
1569		✗	av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1570
1571			// continue on to the next cookie if this one cannot be parsed
1572		✗	if (parse_set_cookie(cookie, &cookie_params))
1573		✗	goto skip_cookie;
1574
1575			// if the cookie has no value, skip it
1576		✗	cookie_entry = av_dict_iterate(cookie_params, NULL);
1577		✗	eql = strchr(cookie, '=');
1578		✗	if (!cookie_entry || !eql || eql == cookie + strspn(cookie, WHITESPACES) ||
1579		✗	memchr(cookie, ';', eql - cookie))
1580		✗	goto skip_cookie;
1581
1582		✗	for (e = cookie_entry; (e = av_dict_iterate(cookie_params, e)); )
1583		✗	if (!av_strcasecmp(e->key, "secure") && !av_stristart(s->location, "https:", NULL))
1584		✗	goto skip_cookie;
1585
1586			// if the cookie has expired, don't add it
1587		✗	if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1588		✗	struct tm tm_buf = {0};
1589		✗	if (!parse_http_date(e->value, &tm_buf)) {
1590		✗	if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1591		✗	goto skip_cookie;
1592			}
1593			}
1594
1595			// if no domain in the cookie assume it applied to this request
1596		✗	domain = cookie_domain(cookie_params);
1597		✗	if (domain && !host_in_cookie_domain(s->host, domain))
1598		✗	goto skip_cookie;
1599
1600		✗	if ((e = av_dict_get(cookie_params, "@hostonly", NULL, 0)) && av_strcasecmp(e->value, s->host))
1601		✗	goto skip_cookie;
1602
1603			// if a cookie path is provided, ensure the request path is within that path
1604		✗	e = av_dict_get(cookie_params, "path", NULL, 0);
1605		✗	if (e) {
1606		✗	size_t len = strlen(e->value);
1607		✗	if (strncmp(path, e->value, len) ||
1608		✗	(len && path[len] && path[len] != '/' && path[len] != '?' &&
1609		✗	e->value[len - 1] != '/'))
1610		✗	goto skip_cookie;
1611			}
1612
1613			// cookie parameters match, so copy the value
1614		✗	if (!*cookies) {
1615		✗	*cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1616			} else {
1617		✗	char *tmp = *cookies;
1618		✗	*cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1619		✗	av_free(tmp);
1620			}
1621		✗	if (!*cookies)
1622		✗	ret = AVERROR(ENOMEM);
1623
1624		✗	skip_cookie:
1625		✗	av_dict_free(&cookie_params);
1626			}
1627
1628		✗	av_free(set_cookies);
1629
1630		✗	return ret;
1631			}
1632
1633		✗	static inline int has_header(const char *str, const char *header)
1634			{
1635			/* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1636		✗	if (!str)
1637		✗	return 0;
1638		✗	return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1639			}
1640
1641		✗	static int http_read_header(URLContext *h)
1642			{
1643		✗	HTTPContext *s = h->priv_data;
1644			char line[MAX_URL_SIZE];
1645		✗	int err = 0, http_err = 0;
1646
1647		✗	av_freep(&s->new_location);
1648		✗	s->expires = 0;
1649		✗	s->chunksize = UINT64_MAX;
1650		✗	s->filesize_from_content_range = UINT64_MAX;
1651		✗	s->content_range_unknown_size = 0;
1652
1653		✗	for (;;) {
1654		✗	int parsed_http_code = 0;
1655
1656		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0) {
1657		✗	av_log(h, AV_LOG_ERROR, "Error reading HTTP response: %s\n",
1658		✗	av_err2str(err));
1659		✗	return err;
1660			}
1661
1662		✗	av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1663
1664		✗	err = process_line(h, line, s->line_count, &parsed_http_code);
1665		✗	if (err < 0) {
1666		✗	if (parsed_http_code) {
1667		✗	http_err = err;
1668			} else {
1669			/* Prefer to return HTTP code error if we've already seen one. */
1670		✗	if (http_err)
1671		✗	return http_err;
1672			else
1673		✗	return err;
1674			}
1675			}
1676		✗	if (err == 0)
1677		✗	break;
1678		✗	s->line_count++;
1679			}
1680		✗	if (http_err)
1681		✗	return http_err;
1682
1683			// filesize from Content-Range can always be used, even if using chunked Transfer-Encoding
1684		✗	if (s->filesize_from_content_range != UINT64_MAX)
1685		✗	s->filesize = s->filesize_from_content_range;
1686		✗	else if (s->content_range_unknown_size)
1687		✗	s->filesize = s->oc_filesize;
1688
1689			/* Remember a concrete complete size for later unknown-total ("*") replies. */
1690		✗	if (s->filesize_from_content_range != UINT64_MAX)
1691		✗	s->oc_filesize = s->filesize_from_content_range;
1692		✗	else if (s->http_code == 200 && s->filesize != UINT64_MAX)
1693		✗	s->oc_filesize = s->filesize;
1694
1695		✗	if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1696		✗	h->is_streamed = 1; /* we can in fact _not_ seek */
1697
1698		✗	if (h->is_streamed)
1699		✗	s->initial_requests = 0; /* unable to use partial requests */
1700
1701			// add any new cookies into the existing cookie string
1702		✗	cookie_string(s->cookie_dict, &s->cookies);
1703		✗	av_dict_free(&s->cookie_dict);
1704
1705		✗	return err;
1706			}
1707
1708			/**
1709			* Escape unsafe characters in path in order to pass them safely to the HTTP
1710			* request. Insipred by the algorithm in GNU wget:
1711			* - escape "%" characters not followed by two hex digits
1712			* - escape all "unsafe" characters except which are also "reserved"
1713			* - pass through everything else
1714			*/
1715		✗	static void bprint_escaped_path(AVBPrint *bp, const char *path)
1716			{
1717			#define NEEDS_ESCAPE(ch) \
1718			((ch) <= ' ' || (ch) >= '\x7f' || \
1719			(ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1720			(ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1721		✗	while (*path) {
1722			char buf[1024];
1723		✗	char *q = buf;
1724		✗	while (*path && q - buf < sizeof(buf) - 4) {
1725		✗	if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1726		✗	*q++ = *path++;
1727		✗	*q++ = *path++;
1728		✗	*q++ = *path++;
1729		✗	} else if (NEEDS_ESCAPE(*path)) {
1730		✗	q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1731			} else {
1732		✗	*q++ = *path++;
1733			}
1734			}
1735		✗	av_bprint_append_data(bp, buf, q - buf);
1736			}
1737		✗	}
1738
1739		✗	static uint64_t request_size(URLContext *h)
1740			{
1741		✗	HTTPContext *s = h->priv_data;
1742		✗	if (s->initial_requests)
1743		✗	return s->initial_request_size;
1744		✗	return s->request_size;
1745			}
1746
1747		✗	static int http_connect(URLContext *h, const char *path, const char *local_path,
1748			const char *hoststr, const char *auth,
1749			const char *proxyauth)
1750			{
1751		✗	HTTPContext *s = h->priv_data;
1752			int post, err;
1753			AVBPrint request;
1754		✗	char *authstr = NULL, *proxyauthstr = NULL;
1755		✗	uint64_t off = s->off;
1756			const char *method;
1757		✗	int send_expect_100 = 0;
1758		✗	int keep_alive = 1;
1759
1760		✗	av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1761
1762			/* send http header */
1763		✗	post = h->flags & AVIO_FLAG_WRITE;
1764
1765		✗	if (s->post_data) {
1766			/* force POST method and disable chunked encoding when
1767			* custom HTTP post data is set */
1768		✗	post = 1;
1769		✗	s->chunked_post = 0;
1770			}
1771
1772		✗	if (s->method)
1773		✗	method = s->method;
1774			else
1775		✗	method = post ? "POST" : "GET";
1776
1777		✗	authstr = ff_http_auth_create_response(&s->auth_state, auth,
1778			local_path, method);
1779		✗	proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1780			local_path, method);
1781
1782		✗	if (post && !s->post_data) {
1783		✗	if (s->send_expect_100 != -1) {
1784		✗	send_expect_100 = s->send_expect_100;
1785			} else {
1786		✗	send_expect_100 = 0;
1787			/* The user has supplied authentication but we don't know the auth type,
1788			* send Expect: 100-continue to get the 401 response including the
1789			* WWW-Authenticate header, or an 100 continue if no auth actually
1790			* is needed. */
1791		✗	if (auth && *auth &&
1792		✗	s->auth_state.auth_type == HTTP_AUTH_NONE)
1793		✗	send_expect_100 = 1;
1794			}
1795			}
1796
1797		✗	av_bprintf(&request, "%s ", method);
1798		✗	bprint_escaped_path(&request, path);
1799		✗	av_bprintf(&request, " HTTP/1.1\r\n");
1800
1801		✗	if (post && s->chunked_post)
1802		✗	av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1803			/* set default headers if needed */
1804		✗	if (!has_header(s->headers, "\r\nUser-Agent: "))
1805		✗	av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1806		✗	if (s->referer) {
1807			/* set default headers if needed */
1808		✗	if (!has_header(s->headers, "\r\nReferer: "))
1809		✗	av_bprintf(&request, "Referer: %s\r\n", s->referer);
1810			}
1811		✗	if (!has_header(s->headers, "\r\nAccept: "))
1812		✗	av_bprintf(&request, "Accept: */*\r\n");
1813			// Note: we send the Range header on purpose, even when we're probing,
1814			// since it allows us to detect more reliably if a (non-conforming)
1815			// server supports seeking by analysing the reply headers.
1816		✗	int is_partial_request = 0;
1817		✗	if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable != 0)) {
1818		✗	av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1819		✗	uint64_t req_size = request_size(h);
1820		✗	if (req_size && s->seekable != 0) {
1821		✗	uint64_t target_off = s->off + req_size;
1822		✗	if (target_off < s->off) /* overflow */
1823		✗	target_off = UINT64_MAX;
1824		✗	if (s->end_off)
1825		✗	target_off = FFMIN(target_off, s->end_off);
1826		✗	if (target_off != UINT64_MAX) {
1827		✗	av_bprintf(&request, "%"PRId64, target_off - 1);
1828		✗	is_partial_request = 1;
1829			}
1830		✗	} else if (s->end_off)
1831		✗	av_bprintf(&request, "%"PRId64, s->end_off - 1);
1832		✗	av_bprintf(&request, "\r\n");
1833			}
1834		✗	if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1835		✗	av_bprintf(&request, "Expect: 100-continue\r\n");
1836
1837		✗	if (!has_header(s->headers, "\r\nConnection: ")) {
1838		✗	keep_alive = s->multiple_requests > 0;
1839		✗	if (s->multiple_requests < 0 /* auto */ && is_partial_request)
1840		✗	keep_alive = 1;
1841		✗	av_bprintf(&request, "Connection: %s\r\n", keep_alive ? "keep-alive" : "close");
1842			}
1843
1844		✗	if (!has_header(s->headers, "\r\nHost: "))
1845		✗	av_bprintf(&request, "Host: %s\r\n", hoststr);
1846		✗	if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1847		✗	av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1848
1849		✗	if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1850		✗	av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1851		✗	if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1852		✗	char *cookies = NULL;
1853		✗	if (!get_cookies(s, &cookies, local_path) && cookies) {
1854		✗	av_bprintf(&request, "Cookie: %s\r\n", cookies);
1855		✗	av_free(cookies);
1856			}
1857			}
1858		✗	if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1859		✗	av_bprintf(&request, "Icy-MetaData: 1\r\n");
1860
1861			/* now add in custom headers */
1862		✗	if (s->headers)
1863		✗	av_bprintf(&request, "%s", s->headers);
1864
1865		✗	if (authstr)
1866		✗	av_bprintf(&request, "%s", authstr);
1867		✗	if (proxyauthstr)
1868		✗	av_bprintf(&request, "Proxy-%s", proxyauthstr);
1869		✗	av_bprintf(&request, "\r\n");
1870
1871		✗	av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1872
1873		✗	if (!av_bprint_is_complete(&request)) {
1874		✗	av_log(h, AV_LOG_ERROR, "overlong headers\n");
1875		✗	err = AVERROR(EINVAL);
1876		✗	goto done;
1877			}
1878
1879		✗	if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1880		✗	goto done;
1881
1882		✗	if (s->post_data)
1883		✗	if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1884		✗	goto done;
1885
1886			/* init input buffer */
1887		✗	s->buf_ptr = s->buffer;
1888		✗	s->buf_end = s->buffer;
1889		✗	s->line_count = 0;
1890		✗	s->off = 0;
1891		✗	s->icy_data_read = 0;
1892		✗	s->chunkend = 0;
1893		✗	s->filesize = UINT64_MAX;
1894		✗	s->range_end = 0;
1895		✗	s->willclose = !keep_alive;
1896		✗	s->end_chunked_post = 0;
1897		✗	s->end_header = 0;
1898			#if CONFIG_ZLIB
1899		✗	s->compressed = 0;
1900			#endif
1901		✗	if (post && !s->post_data && !send_expect_100) {
1902			/* Pretend that it did work. We didn't read any header yet, since
1903			* we've still to send the POST data, but the code calling this
1904			* function will check http_code after we return. */
1905		✗	s->http_code = 200;
1906		✗	err = 0;
1907		✗	goto done;
1908			}
1909
1910			/* wait for header */
1911		✗	int64_t latency = av_gettime();
1912		✗	err = http_read_header(h);
1913		✗	latency = av_gettime() - latency;
1914		✗	if (err < 0)
1915		✗	goto done;
1916
1917		✗	s->nb_requests++;
1918		✗	s->sum_latency += latency;
1919		✗	s->max_latency = FFMAX(s->max_latency, latency);
1920
1921			/* Redirects and authentication challenges are answered with another
1922			* request, whose reply is checked instead. */
1923		✗	if ((s->new_location && is_redirect(s->http_code)) ||
1924		✗	s->http_code == 401 || s->http_code == 407)
1925		✗	s->off = off;
1926
1927		✗	if (off != s->off) {
1928		✗	av_log(h, AV_LOG_ERROR,
1929			"Unexpected offset: expected %"PRIu64", got %"PRIu64"\n",
1930			off, s->off);
1931		✗	err = AVERROR(EIO);
1932		✗	goto done;
1933			}
1934
1935		✗	err = 0;
1936		✗	done:
1937		✗	av_freep(&authstr);
1938		✗	av_freep(&proxyauthstr);
1939		✗	return err;
1940			}
1941
1942		✗	static uint64_t requested_end(HTTPContext *s)
1943			{
1944		✗	return s->end_off ? FFMIN(s->end_off, s->filesize) : s->filesize;
1945			}
1946
1947		✗	static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1948			{
1949		✗	HTTPContext *s = h->priv_data;
1950			int len;
1951
1952		✗	if (!s->hd)
1953		✗	return AVERROR(EIO);
1954
1955		✗	if (s->chunksize != UINT64_MAX) {
1956		✗	if (s->chunkend) {
1957		✗	return AVERROR_EOF;
1958			}
1959		✗	if (!s->chunksize) {
1960			char line[32];
1961			int err;
1962
1963			do {
1964		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1965		✗	return err;
1966		✗	} while (!*line); /* skip CR LF from last chunk */
1967
1968		✗	s->chunksize = strtoull(line, NULL, 16);
1969
1970		✗	av_log(h, AV_LOG_TRACE,
1971			"Chunked encoding data size: %"PRIu64"\n",
1972			s->chunksize);
1973
1974		✗	if (!s->chunksize) {
1975			/* a partial reply that ends at its range end is continued */
1976		✗	int more = s->range_end && s->off == s->range_end &&
1977		✗	s->range_end < requested_end(s);
1978		✗	if (s->multiple_requests) {
1979			do {
1980		✗	if ((err = http_get_line(s, line, sizeof(line))) < 0)
1981		✗	return err;
1982		✗	} while (*line);
1983		✗	s->chunkend = !more;
1984			} else {
1985		✗	av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1986		✗	ffurl_closep(&s->hd);
1987			}
1988		✗	return more ? AVERROR(EAGAIN) : 0;
1989			}
1990		✗	else if (s->chunksize == UINT64_MAX) {
1991		✗	av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1992			s->chunksize);
1993		✗	return AVERROR(EINVAL);
1994			}
1995			}
1996		✗	size = FFMIN(size, s->chunksize);
1997			}
1998
1999			/* read bytes from input buffer first */
2000		✗	len = s->buf_end - s->buf_ptr;
2001		✗	if (len > 0) {
2002		✗	if (len > size)
2003		✗	len = size;
2004		✗	memcpy(buf, s->buf_ptr, len);
2005		✗	s->buf_ptr += len;
2006			} else {
2007		✗	uint64_t file_end = requested_end(s);
2008		✗	uint64_t target_end = s->range_end ? s->range_end : file_end;
2009		✗	if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= file_end)
2010		✗	return AVERROR_EOF;
2011		✗	if (s->off == target_end && target_end < file_end)
2012		✗	return AVERROR(EAGAIN); /* reached end of content range */
2013		✗	len = ffurl_read(s->hd, buf, size);
2014		✗	if ((!len || len == AVERROR_EOF) &&
2015		✗	(!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
2016		✗	av_log(h, AV_LOG_ERROR,
2017			"Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
2018			s->off, target_end
2019			);
2020		✗	return AVERROR(EIO);
2021			}
2022			}
2023		✗	if (len > 0) {
2024		✗	s->off += len;
2025		✗	if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
2026		✗	av_assert0(s->chunksize >= len);
2027		✗	s->chunksize -= len;
2028			}
2029			}
2030		✗	return len;
2031			}
2032
2033			#if CONFIG_ZLIB
2034			#define DECOMPRESS_BUF_SIZE (256 * 1024)
2035		✗	static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
2036			{
2037		✗	HTTPContext *s = h->priv_data;
2038			int ret;
2039
2040		✗	if (!s->inflate_buffer) {
2041		✗	s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
2042		✗	if (!s->inflate_buffer)
2043		✗	return AVERROR(ENOMEM);
2044			}
2045
2046		✗	if (s->inflate_stream.avail_in == 0) {
2047		✗	int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
2048		✗	if (read == AVERROR(EAGAIN)) {
2049		✗	s->chunkend = 1;
2050		✗	return AVERROR_EOF;
2051			}
2052		✗	if (read <= 0)
2053		✗	return read;
2054		✗	s->inflate_stream.next_in = s->inflate_buffer;
2055		✗	s->inflate_stream.avail_in = read;
2056			}
2057
2058		✗	s->inflate_stream.avail_out = size;
2059		✗	s->inflate_stream.next_out = buf;
2060
2061		✗	ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
2062		✗	if (ret != Z_OK && ret != Z_STREAM_END)
2063		✗	av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
2064			ret, s->inflate_stream.msg);
2065
2066		✗	return size - s->inflate_stream.avail_out;
2067			}
2068			#endif /* CONFIG_ZLIB */
2069
2070			/* Record the end of the resource if err is the 416 that marks it. */
2071		✗	static int http_end_of_resource(HTTPContext *s, int err)
2072			{
2073		✗	if (!is_end_of_resource(s, err, s->off))
2074		✗	return 0;
2075		✗	s->oc_filesize = s->filesize_from_content_range;
2076		✗	s->filesize = s->oc_filesize;
2077		✗	s->end_of_resource = 1;
2078		✗	return 1;
2079			}
2080
2081			static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
2082
2083		✗	static int http_read_stream(URLContext *h, uint8_t *buf, int size)
2084			{
2085		✗	HTTPContext *s = h->priv_data;
2086			int err, read_ret;
2087			int64_t seek_ret;
2088		✗	int reconnect_delay = 0;
2089		✗	int reconnect_delay_total = 0;
2090		✗	int conn_attempts = 1;
2091
2092		✗	if (s->end_of_resource)
2093		✗	return AVERROR_EOF;
2094
2095		✗	if (!s->hd)
2096		✗	return s->off < requested_end(s) ? AVERROR(EIO) : AVERROR_EOF;
2097
2098		✗	if (s->end_chunked_post && !s->end_header) {
2099		✗	err = http_read_header(h);
2100		✗	if (err < 0)
2101		✗	return err;
2102			}
2103
2104			#if CONFIG_ZLIB
2105		✗	if (s->compressed)
2106		✗	return http_buf_read_compressed(h, buf, size);
2107			#endif /* CONFIG_ZLIB */
2108
2109		✗	retry:
2110		✗	read_ret = http_buf_read(h, buf, size);
2111		✗	while (read_ret < 0) {
2112		✗	uint64_t target = h->is_streamed ? 0 : s->off;
2113		✗	uint64_t file_end = requested_end(s);
2114		✗	bool is_premature = file_end > 0 && s->off < file_end;
2115
2116		✗	if (read_ret == AVERROR_EXIT)
2117		✗	break;
2118		✗	else if (read_ret == AVERROR(EAGAIN)) {
2119			/* send new request for more data on existing connection */
2120		✗	AVDictionary *options = NULL;
2121		✗	if (s->willclose)
2122		✗	ffurl_closep(&s->hd);
2123		✗	s->initial_requests = 0; /* continue streaming uninterrupted from now on */
2124		✗	read_ret = http_open_cnx(h, &options, 1);
2125		✗	av_dict_free(&options);
2126		✗	if (read_ret == 0)
2127		✗	goto retry;
2128		✗	if (http_end_of_resource(s, read_ret)) {
2129		✗	read_ret = AVERROR_EOF;
2130		✗	break;
2131			}
2132			}
2133
2134		✗	if (h->is_streamed && !s->reconnect_streamed)
2135		✗	break;
2136
2137		✗	if (!(s->reconnect && is_premature) &&
2138		✗	!(s->reconnect_at_eof && read_ret == AVERROR_EOF)) {
2139		✗	if (is_premature)
2140		✗	return AVERROR(EIO);
2141			else
2142		✗	break;
2143			}
2144
2145		✗	if (reconnect_delay > s->reconnect_delay_max || (s->reconnect_max_retries >= 0 && conn_attempts > s->reconnect_max_retries) ||
2146		✗	reconnect_delay_total > s->reconnect_delay_total_max)
2147		✗	return AVERROR(EIO);
2148
2149		✗	av_log(h, AV_LOG_WARNING, "Will %s at %"PRIu64" in %d second(s), error=%s.\n", s->willclose ? "reconnect" : "retry",
2150		✗	s->off, reconnect_delay, av_err2str(read_ret));
2151		✗	err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
2152		✗	if (err != AVERROR(ETIMEDOUT))
2153		✗	return err;
2154		✗	reconnect_delay_total += reconnect_delay;
2155		✗	reconnect_delay = 1 + 2*reconnect_delay;
2156		✗	conn_attempts++;
2157		✗	seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
2158		✗	if (seek_ret >= 0 && seek_ret != target) {
2159		✗	ffurl_closep(&s->hd);
2160		✗	av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
2161		✗	return read_ret;
2162			}
2163		✗	if (s->end_of_resource) {
2164		✗	read_ret = AVERROR_EOF;
2165		✗	break;
2166			}
2167
2168		✗	read_ret = http_buf_read(h, buf, size);
2169			}
2170
2171		✗	return read_ret;
2172			}
2173
2174			// Like http_read_stream(), but no short reads.
2175			// Assumes partial reads are an error.
2176		✗	static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
2177			{
2178		✗	int pos = 0;
2179		✗	while (pos < size) {
2180		✗	int len = http_read_stream(h, buf + pos, size - pos);
2181		✗	if (len < 0)
2182		✗	return len;
2183		✗	pos += len;
2184			}
2185		✗	return pos;
2186			}
2187
2188		✗	static int store_icy(URLContext *h, int size)
2189			{
2190		✗	HTTPContext *s = h->priv_data;
2191			/* until next metadata packet */
2192			uint64_t remaining;
2193
2194		✗	if (s->icy_metaint < s->icy_data_read)
2195		✗	return AVERROR_INVALIDDATA;
2196		✗	remaining = s->icy_metaint - s->icy_data_read;
2197
2198		✗	if (!remaining) {
2199			/* The metadata packet is variable sized. It has a 1 byte header
2200			* which sets the length of the packet (divided by 16). If it's 0,
2201			* the metadata doesn't change. After the packet, icy_metaint bytes
2202			* of normal data follows. */
2203			uint8_t ch;
2204		✗	int len = http_read_stream_all(h, &ch, 1);
2205		✗	if (len < 0)
2206		✗	return len;
2207		✗	if (ch > 0) {
2208			char data[255 * 16 + 1];
2209			int ret;
2210		✗	len = ch * 16;
2211		✗	ret = http_read_stream_all(h, data, len);
2212		✗	if (ret < 0)
2213		✗	return ret;
2214		✗	data[len] = 0;
2215		✗	if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
2216		✗	return ret;
2217		✗	ff_http_parse_icy_packet(h, &s->metadata, data);
2218			}
2219		✗	s->icy_data_read = 0;
2220		✗	remaining = s->icy_metaint;
2221			}
2222
2223		✗	return FFMIN(size, remaining);
2224			}
2225
2226		✗	static int http_read(URLContext *h, uint8_t *buf, int size)
2227			{
2228		✗	HTTPContext *s = h->priv_data;
2229
2230		✗	if (s->icy_metaint > 0) {
2231		✗	size = store_icy(h, size);
2232		✗	if (size < 0)
2233		✗	return size;
2234			}
2235
2236		✗	size = http_read_stream(h, buf, size);
2237		✗	if (size > 0)
2238		✗	s->icy_data_read += size;
2239		✗	return size;
2240			}
2241
2242			/* used only when posting data */
2243		✗	static int http_write(URLContext *h, const uint8_t *buf, int size)
2244			{
2245		✗	char temp[11] = ""; /* 32-bit hex + CRLF + nul */
2246			int ret;
2247		✗	char crlf[] = "\r\n";
2248		✗	HTTPContext *s = h->priv_data;
2249
2250		✗	if (!s->chunked_post) {
2251			/* non-chunked data is sent without any special encoding */
2252		✗	return ffurl_write(s->hd, buf, size);
2253			}
2254
2255			/* silently ignore zero-size data since chunk encoding that would
2256			* signal EOF */
2257		✗	if (size > 0) {
2258			/* upload data using chunked encoding */
2259		✗	snprintf(temp, sizeof(temp), "%x\r\n", size);
2260
2261		✗	if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
2262		✗	(ret = ffurl_write(s->hd, buf, size)) < 0 ||
2263		✗	(ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
2264		✗	return ret;
2265			}
2266		✗	return size;
2267			}
2268
2269		✗	static int http_shutdown(URLContext *h, int flags)
2270			{
2271		✗	int ret = 0;
2272		✗	char footer[] = "0\r\n\r\n";
2273		✗	HTTPContext *s = h->priv_data;
2274
2275			/* signal end of chunked encoding if used */
2276		✗	if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
2277		✗	((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
2278		✗	ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
2279		✗	ret = ret > 0 ? 0 : ret;
2280			/* flush the receive buffer when it is write only mode */
2281		✗	if (!(flags & AVIO_FLAG_READ)) {
2282			char buf[1024];
2283			int read_ret;
2284		✗	s->hd->flags |= AVIO_FLAG_NONBLOCK;
2285		✗	read_ret = ffurl_read(s->hd, buf, sizeof(buf));
2286		✗	s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
2287		✗	if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
2288		✗	av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
2289		✗	ret = read_ret;
2290			}
2291			}
2292		✗	s->end_chunked_post = 1;
2293			}
2294
2295		✗	return ret;
2296			}
2297
2298		✗	static int http_close(URLContext *h)
2299			{
2300		✗	int ret = 0;
2301		✗	HTTPContext *s = h->priv_data;
2302
2303			#if CONFIG_ZLIB
2304		✗	inflateEnd(&s->inflate_stream);
2305		✗	av_freep(&s->inflate_buffer);
2306			#endif /* CONFIG_ZLIB */
2307
2308		✗	if (s->hd && !s->end_chunked_post)
2309			/* Close the write direction by sending the end of chunked encoding. */
2310		✗	ret = http_shutdown(h, h->flags);
2311
2312		✗	if (s->hd)
2313		✗	ffurl_closep(&s->hd);
2314		✗	av_dict_free(&s->chained_options);
2315		✗	av_dict_free(&s->cookie_dict);
2316		✗	av_dict_free(&s->redirect_cache);
2317		✗	av_freep(&s->new_location);
2318		✗	av_freep(&s->uri);
2319		✗	av_freep(&s->host);
2320
2321		✗	av_log(h, AV_LOG_DEBUG, "Statistics: %d connection%s, %d request%s, %d retr%s, %d reconnection%s, %d redirect%s\n",
2322		✗	s->nb_connections, s->nb_connections == 1 ? "" : "s",
2323		✗	s->nb_requests, s->nb_requests == 1 ? "" : "s",
2324		✗	s->nb_retries, s->nb_retries == 1 ? "y" : "ies",
2325		✗	s->nb_reconnects, s->nb_reconnects == 1 ? "" : "s",
2326		✗	s->nb_redirects, s->nb_redirects == 1 ? "" : "s");
2327
2328		✗	if (s->nb_requests > 0) {
2329		✗	av_log(h, AV_LOG_DEBUG, "Latency: %.2f ms avg, %.2f ms max\n",
2330		✗	1e-3 * s->sum_latency / s->nb_requests,
2331		✗	1e-3 * s->max_latency);
2332			}
2333		✗	return ret;
2334			}
2335
2336		✗	static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
2337			{
2338		✗	HTTPContext *s = h->priv_data;
2339		✗	URLContext *old_hd = NULL;
2340		✗	uint64_t old_off = s->off;
2341		✗	uint64_t old_range_end = s->range_end;
2342		✗	uint64_t old_chunksize = s->chunksize;
2343		✗	int old_chunkend = s->chunkend;
2344		✗	int old_willclose = s->willclose;
2345			#if CONFIG_ZLIB
2346		✗	int old_compressed = s->compressed;
2347			#endif
2348		✗	int old_end_of_resource = s->end_of_resource;
2349			uint8_t old_buf[BUFFER_SIZE];
2350			int old_buf_size, ret;
2351		✗	AVDictionary *options = NULL;
2352			uint8_t discard[4096];
2353
2354		✗	if (whence == AVSEEK_SIZE)
2355		✗	return s->filesize == UINT64_MAX ? AVERROR(ENOSYS) : s->filesize;
2356		✗	else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
2357		✗	return AVERROR(ENOSYS);
2358
2359		✗	if (whence == SEEK_CUR)
2360		✗	off += s->off;
2361		✗	else if (whence == SEEK_END)
2362		✗	off += s->filesize;
2363		✗	else if (whence != SEEK_SET)
2364		✗	return AVERROR(EINVAL);
2365		✗	if (off < 0)
2366		✗	return AVERROR(EINVAL);
2367		✗	if (!force_reconnect && off == s->off && s->hd)
2368		✗	return s->off;
2369		✗	if (off && h->is_streamed)
2370		✗	return AVERROR(ENOSYS);
2371		✗	s->off = off;
2372		✗	s->end_of_resource = 0;
2373
2374			/* do not try to make a new connection if seeking past the end of the file */
2375		✗	if (s->off >= requested_end(s)) {
2376			/* nothing of the old reply belongs to this offset */
2377		✗	ffurl_closep(&s->hd);
2378		✗	s->buf_ptr = s->buf_end = s->buffer;
2379		✗	return s->off;
2380			}
2381
2382			/* if the location changed (redirect), revert to the original uri */
2383		✗	if (strcmp(s->uri, s->location)) {
2384			char *new_uri;
2385		✗	new_uri = av_strdup(s->uri);
2386		✗	if (!new_uri)
2387		✗	return AVERROR(ENOMEM);
2388		✗	av_free(s->location);
2389		✗	s->location = new_uri;
2390			}
2391
2392			/* we save the old context in case the seek fails */
2393		✗	old_buf_size = s->buf_end - s->buf_ptr;
2394		✗	memcpy(old_buf, s->buf_ptr, old_buf_size);
2395
2396			/* try to reuse existing connection for small seeks */
2397		✗	int short_seek = ffurl_get_short_seek(h);
2398		✗	uint64_t old_read_pos = old_off + old_buf_size;
2399		✗	if (s->hd && !s->willclose && s->range_end && short_seek > 0 &&
2400		✗	old_read_pos + short_seek >= s->range_end)
2401		✗	{
2402		✗	uint64_t remaining = s->range_end - old_read_pos;
2403			av_assert1(remaining <= short_seek);
2404
2405			/* drain remaining data left on the wire from previous request */
2406		✗	av_log(h, AV_LOG_DEBUG, "Soft-seeking to offset %"PRIu64" by draining "
2407			"%"PRIu64" remaining byte(s)\n", s->off, remaining);
2408		✗	while (remaining) {
2409		✗	ret = ffurl_read(s->hd, discard, FFMIN(remaining, sizeof(discard)));
2410		✗	if (ret < 0 || ret == AVERROR_EOF || (ret == 0 && remaining)) {
2411			/* connection broken or stuck, need to reopen */
2412		✗	ffurl_closep(&s->hd);
2413		✗	break;
2414			}
2415		✗	remaining -= ret;
2416			}
2417
2418		✗	ret = http_open_cnx(h, &options, 1);
2419		✗	if (ret >= 0 || http_end_of_resource(s, ret)) {
2420		✗	goto done;
2421			} else {
2422			/* fall back to normal reconnection */
2423		✗	ffurl_closep(&s->hd);
2424		✗	old_hd = NULL;
2425			}
2426			} else {
2427			/* can't soft seek; always open new connection */
2428		✗	old_hd = s->hd;
2429		✗	s->hd = NULL;
2430			}
2431
2432		✗	if ((ret = http_open_cnx(h, &options, 1)) < 0 &&
2433		✗	!http_end_of_resource(s, ret)) {
2434			/* if it fails, continue on old connection if possible */
2435		✗	if (old_hd) {
2436		✗	memcpy(s->buffer, old_buf, old_buf_size);
2437		✗	s->buf_ptr = s->buffer;
2438		✗	s->buf_end = s->buffer + old_buf_size;
2439		✗	s->hd = old_hd;
2440		✗	s->range_end = old_range_end;
2441		✗	s->chunksize = old_chunksize;
2442		✗	s->chunkend = old_chunkend;
2443		✗	s->willclose = old_willclose;
2444			#if CONFIG_ZLIB
2445		✗	s->compressed = old_compressed;
2446			#endif
2447			}
2448		✗	s->off = old_off;
2449		✗	s->end_of_resource = old_end_of_resource;
2450		✗	av_dict_free(&options);
2451		✗	return ret;
2452			}
2453
2454		✗	done:
2455		✗	av_dict_free(&options);
2456		✗	ffurl_close(old_hd);
2457		✗	return off;
2458			}
2459
2460		✗	static int64_t http_seek(URLContext *h, int64_t off, int whence)
2461			{
2462		✗	return http_seek_internal(h, off, whence, 0);
2463			}
2464
2465		✗	static int http_get_file_handle(URLContext *h)
2466			{
2467		✗	HTTPContext *s = h->priv_data;
2468		✗	return ffurl_get_file_handle(s->hd);
2469			}
2470
2471		✗	static int http_get_short_seek(URLContext *h)
2472			{
2473		✗	HTTPContext *s = h->priv_data;
2474		✗	if (s->short_seek_size >= 1)
2475		✗	return s->short_seek_size;
2476		✗	return ffurl_get_short_seek(s->hd);
2477			}
2478
2479			#define HTTP_CLASS(flavor) \
2480			static const AVClass flavor ## _context_class = { \
2481			.class_name = # flavor, \
2482			.item_name = av_default_item_name, \
2483			.option = http_options, \
2484			.version = LIBAVUTIL_VERSION_INT, \
2485			}
2486
2487			#if CONFIG_HTTP_PROTOCOL
2488			HTTP_CLASS(http);
2489
2490			const URLProtocol ff_http_protocol = {
2491			.name = "http",
2492			.url_open2 = http_open,
2493			.url_accept = http_accept,
2494			.url_handshake = http_handshake,
2495			.url_read = http_read,
2496			.url_write = http_write,
2497			.url_seek = http_seek,
2498			.url_close = http_close,
2499			.url_get_file_handle = http_get_file_handle,
2500			.url_get_short_seek = http_get_short_seek,
2501			.url_shutdown = http_shutdown,
2502			.priv_data_size = sizeof(HTTPContext),
2503			.priv_data_class = &http_context_class,
2504			.flags = URL_PROTOCOL_FLAG_NETWORK,
2505			.default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
2506			};
2507			#endif /* CONFIG_HTTP_PROTOCOL */
2508
2509			#if CONFIG_HTTPS_PROTOCOL
2510			HTTP_CLASS(https);
2511
2512			const URLProtocol ff_https_protocol = {
2513			.name = "https",
2514			.url_open2 = http_open,
2515			.url_read = http_read,
2516			.url_write = http_write,
2517			.url_seek = http_seek,
2518			.url_close = http_close,
2519			.url_get_file_handle = http_get_file_handle,
2520			.url_get_short_seek = http_get_short_seek,
2521			.url_shutdown = http_shutdown,
2522			.priv_data_size = sizeof(HTTPContext),
2523			.priv_data_class = &https_context_class,
2524			.flags = URL_PROTOCOL_FLAG_NETWORK,
2525			.default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
2526			};
2527			#endif /* CONFIG_HTTPS_PROTOCOL */
2528
2529			#if CONFIG_HTTPPROXY_PROTOCOL
2530		✗	static int http_proxy_close(URLContext *h)
2531			{
2532		✗	HTTPContext *s = h->priv_data;
2533		✗	if (s->hd)
2534		✗	ffurl_closep(&s->hd);
2535		✗	return 0;
2536			}
2537
2538		✗	static int http_proxy_open(URLContext *h, const char *uri, int flags)
2539			{
2540		✗	HTTPContext *s = h->priv_data;
2541			char hostname[1024], hoststr[1024];
2542			char auth[1024], pathbuf[1024], *path;
2543			char lower_url[100];
2544		✗	int port, ret = 0, auth_attempts = 0;
2545			HTTPAuthType cur_auth_type;
2546			char *authstr;
2547
2548		✗	if( s->seekable == 1 )
2549		✗	h->is_streamed = 0;
2550			else
2551		✗	h->is_streamed = 1;
2552
2553		✗	av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
2554			pathbuf, sizeof(pathbuf), uri);
2555		✗	ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
2556		✗	path = pathbuf;
2557		✗	if (*path == '/')
2558		✗	path++;
2559
2560		✗	ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
2561			NULL);
2562		✗	redo:
2563		✗	ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
2564		✗	&h->interrupt_callback, NULL,
2565			h->protocol_whitelist, h->protocol_blacklist, h);
2566		✗	if (ret < 0)
2567		✗	return ret;
2568
2569		✗	authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
2570			path, "CONNECT");
2571		✗	snprintf(s->buffer, sizeof(s->buffer),
2572			"CONNECT %s HTTP/1.1\r\n"
2573			"Host: %s\r\n"
2574			"Connection: close\r\n"
2575			"%s%s"
2576			"\r\n",
2577			path,
2578			hoststr,
2579		✗	authstr ? "Proxy-" : "", authstr ? authstr : "");
2580		✗	av_freep(&authstr);
2581
2582		✗	if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
2583		✗	goto fail;
2584
2585		✗	s->buf_ptr = s->buffer;
2586		✗	s->buf_end = s->buffer;
2587		✗	s->line_count = 0;
2588		✗	s->filesize = UINT64_MAX;
2589		✗	cur_auth_type = s->proxy_auth_state.auth_type;
2590
2591			/* Note: This uses buffering, potentially reading more than the
2592			* HTTP header. If tunneling a protocol where the server starts
2593			* the conversation, we might buffer part of that here, too.
2594			* Reading that requires using the proper ffurl_read() function
2595			* on this URLContext, not using the fd directly (as the tls
2596			* protocol does). This shouldn't be an issue for tls though,
2597			* since the client starts the conversation there, so there
2598			* is no extra data that we might buffer up here.
2599			*/
2600		✗	ret = http_read_header(h);
2601		✗	if (ret < 0)
2602		✗	goto fail;
2603
2604		✗	auth_attempts++;
2605		✗	if (s->http_code == 407 &&
2606		✗	(cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
2607		✗	s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && auth_attempts < 2) {
2608		✗	ffurl_closep(&s->hd);
2609		✗	goto redo;
2610			}
2611
2612		✗	if (s->http_code < 400)
2613		✗	return 0;
2614		✗	ret = ff_http_averror(s->http_code, AVERROR(EIO));
2615
2616		✗	fail:
2617		✗	http_proxy_close(h);
2618		✗	return ret;
2619			}
2620
2621		✗	static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
2622			{
2623		✗	HTTPContext *s = h->priv_data;
2624		✗	return ffurl_write(s->hd, buf, size);
2625			}
2626
2627			const URLProtocol ff_httpproxy_protocol = {
2628			.name = "httpproxy",
2629			.url_open = http_proxy_open,
2630			.url_read = http_buf_read,
2631			.url_write = http_proxy_write,
2632			.url_close = http_proxy_close,
2633			.url_get_file_handle = http_get_file_handle,
2634			.priv_data_size = sizeof(HTTPContext),
2635			.flags = URL_PROTOCOL_FLAG_NETWORK,
2636			};
2637			#endif /* CONFIG_HTTPPROXY_PROTOCOL */
2638