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