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