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 "config.h"
23
24 #if CONFIG_ZLIB
25 #include <zlib.h>
26 #endif /* CONFIG_ZLIB */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/bprint.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/time.h"
33 #include "libavutil/parseutils.h"
34
35 #include "avformat.h"
36 #include "http.h"
37 #include "httpauth.h"
38 #include "internal.h"
39 #include "network.h"
40 #include "os_support.h"
41 #include "url.h"
42
43 /* XXX: POST protocol is not completely implemented because ffmpeg uses
44 * only a subset of it. */
45
46 /* The IO buffer size is unrelated to the max URL size in itself, but needs
47 * to be large enough to fit the full request headers (including long
48 * path names). */
49 #define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)
50 #define MAX_REDIRECTS 8
51 #define HTTP_SINGLE 1
52 #define HTTP_MUTLI 2
53 #define MAX_EXPIRY 19
54 #define WHITESPACES " \n\t\r"
55 typedef enum {
56 LOWER_PROTO,
57 READ_HEADERS,
58 WRITE_REPLY_HEADERS,
59 FINISH
60 }HandshakeState;
61
62 typedef struct HTTPContext {
63 const AVClass *class;
64 URLContext *hd;
65 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
66 int line_count;
67 int http_code;
68 /* Used if "Transfer-Encoding: chunked" otherwise -1. */
69 uint64_t chunksize;
70 int chunkend;
71 uint64_t off, end_off, filesize;
72 char *location;
73 HTTPAuthState auth_state;
74 HTTPAuthState proxy_auth_state;
75 char *http_proxy;
76 char *headers;
77 char *mime_type;
78 char *http_version;
79 char *user_agent;
80 char *referer;
81 char *content_type;
82 /* Set if the server correctly handles Connection: close and will close
83 * the connection after feeding us the content. */
84 int willclose;
85 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */
86 int chunked_post;
87 /* A flag which indicates if the end of chunked encoding has been sent. */
88 int end_chunked_post;
89 /* A flag which indicates we have finished to read POST reply. */
90 int end_header;
91 /* A flag which indicates if we use persistent connections. */
92 int multiple_requests;
93 uint8_t *post_data;
94 int post_datalen;
95 int is_akamai;
96 int is_mediagateway;
97 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name)
98 /* A dictionary containing cookies keyed by cookie name */
99 AVDictionary *cookie_dict;
100 int icy;
101 /* how much data was read since the last ICY metadata packet */
102 uint64_t icy_data_read;
103 /* after how many bytes of read data a new metadata packet will be found */
104 uint64_t icy_metaint;
105 char *icy_metadata_headers;
106 char *icy_metadata_packet;
107 AVDictionary *metadata;
108 #if CONFIG_ZLIB
109 int compressed;
110 z_stream inflate_stream;
111 uint8_t *inflate_buffer;
112 #endif /* CONFIG_ZLIB */
113 AVDictionary *chained_options;
114 /* -1 = try to send if applicable, 0 = always disabled, 1 = always enabled */
115 int send_expect_100;
116 char *method;
117 int reconnect;
118 int reconnect_at_eof;
119 int reconnect_on_network_error;
120 int reconnect_streamed;
121 int reconnect_delay_max;
122 char *reconnect_on_http_error;
123 int listen;
124 char *resource;
125 int reply_code;
126 int is_multi_client;
127 HandshakeState handshake_step;
128 int is_connected_server;
129 } HTTPContext;
130
131 #define OFFSET(x) offsetof(HTTPContext, x)
132 #define D AV_OPT_FLAG_DECODING_PARAM
133 #define E AV_OPT_FLAG_ENCODING_PARAM
134 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
135
136 static const AVOption options[] = {
137 { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D },
138 { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
139 { "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
140 { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
141 { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
142 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
143 { "referer", "override referer header", OFFSET(referer), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D },
144 #if FF_API_HTTP_USER_AGENT
145 { "user-agent", "use the \"user_agent\" option instead", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D|AV_OPT_FLAG_DEPRECATED },
146 #endif
147 { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D | E },
148 { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
149 { "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 },
150 { "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 },
151 { "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 },
152 { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D },
153 { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
154 { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT },
155 { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
156 { "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, "auth_type"},
157 { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
158 { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
159 { "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 },
160 { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E },
161 { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
162 { "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 },
163 { "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 },
164 { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
165 { "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
166 { "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 },
167 { "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 },
168 { "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
169 { "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 },
170 { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E },
171 { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
172 { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E},
173 { NULL }
174 };
175
176 static int http_connect(URLContext *h, const char *path, const char *local_path,
177 const char *hoststr, const char *auth,
178 const char *proxyauth, int *new_location);
179 static int http_read_header(URLContext *h, int *new_location);
180 static int http_shutdown(URLContext *h, int flags);
181
ff_http_init_auth_state(URLContext * dest,const URLContext * src)182 void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
183 {
184 memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
185 &((HTTPContext *)src->priv_data)->auth_state,
186 sizeof(HTTPAuthState));
187 memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
188 &((HTTPContext *)src->priv_data)->proxy_auth_state,
189 sizeof(HTTPAuthState));
190 }
191
http_open_cnx_internal(URLContext * h,AVDictionary ** options)192 static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
193 {
194 const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
195 char *hashmark;
196 char hostname[1024], hoststr[1024], proto[10];
197 char auth[1024], proxyauth[1024] = "";
198 char path1[MAX_URL_SIZE], sanitized_path[MAX_URL_SIZE];
199 char buf[1024], urlbuf[MAX_URL_SIZE];
200 int port, use_proxy, err, location_changed = 0;
201 HTTPContext *s = h->priv_data;
202
203 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
204 hostname, sizeof(hostname), &port,
205 path1, sizeof(path1), s->location);
206 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
207
208 proxy_path = s->http_proxy ? s->http_proxy : getenv("http_proxy");
209 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
210 proxy_path && av_strstart(proxy_path, "http://", NULL);
211
212 if (!strcmp(proto, "https")) {
213 lower_proto = "tls";
214 use_proxy = 0;
215 if (port < 0)
216 port = 443;
217 /* pass http_proxy to underlying protocol */
218 if (s->http_proxy) {
219 err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
220 if (err < 0)
221 return err;
222 }
223 }
224 if (port < 0)
225 port = 80;
226
227 hashmark = strchr(path1, '#');
228 if (hashmark)
229 *hashmark = '\0';
230
231 if (path1[0] == '\0') {
232 path = "/";
233 } else if (path1[0] == '?') {
234 snprintf(sanitized_path, sizeof(sanitized_path), "/%s", path1);
235 path = sanitized_path;
236 } else {
237 path = path1;
238 }
239 local_path = path;
240 if (use_proxy) {
241 /* Reassemble the request URL without auth string - we don't
242 * want to leak the auth to the proxy. */
243 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
244 path1);
245 path = urlbuf;
246 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
247 hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
248 }
249
250 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
251
252 if (!s->hd) {
253 err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
254 &h->interrupt_callback, options,
255 h->protocol_whitelist, h->protocol_blacklist, h);
256 if (err < 0)
257 return err;
258 }
259
260 err = http_connect(h, path, local_path, hoststr,
261 auth, proxyauth, &location_changed);
262 if (err < 0)
263 return err;
264
265 return location_changed;
266 }
267
http_should_reconnect(HTTPContext * s,int err)268 static int http_should_reconnect(HTTPContext *s, int err)
269 {
270 const char *status_group;
271 char http_code[4];
272
273 switch (err) {
274 case AVERROR_HTTP_BAD_REQUEST:
275 case AVERROR_HTTP_UNAUTHORIZED:
276 case AVERROR_HTTP_FORBIDDEN:
277 case AVERROR_HTTP_NOT_FOUND:
278 case AVERROR_HTTP_OTHER_4XX:
279 status_group = "4xx";
280 break;
281
282 case AVERROR_HTTP_SERVER_ERROR:
283 status_group = "5xx";
284 break;
285
286 default:
287 return s->reconnect_on_network_error;
288 }
289
290 if (!s->reconnect_on_http_error)
291 return 0;
292
293 if (av_match_list(status_group, s->reconnect_on_http_error, ',') > 0)
294 return 1;
295
296 snprintf(http_code, sizeof(http_code), "%d", s->http_code);
297
298 return av_match_list(http_code, s->reconnect_on_http_error, ',') > 0;
299 }
300
301 /* return non zero if error */
http_open_cnx(URLContext * h,AVDictionary ** options)302 static int http_open_cnx(URLContext *h, AVDictionary **options)
303 {
304 HTTPAuthType cur_auth_type, cur_proxy_auth_type;
305 HTTPContext *s = h->priv_data;
306 int location_changed, attempts = 0, redirects = 0;
307 int reconnect_delay = 0;
308 uint64_t off;
309
310 redo:
311 av_dict_copy(options, s->chained_options, 0);
312
313 cur_auth_type = s->auth_state.auth_type;
314 cur_proxy_auth_type = s->auth_state.auth_type;
315
316 off = s->off;
317 location_changed = http_open_cnx_internal(h, options);
318 if (location_changed < 0) {
319 if (!http_should_reconnect(s, location_changed) ||
320 reconnect_delay > s->reconnect_delay_max)
321 goto fail;
322
323 av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s).\n", off, reconnect_delay);
324 location_changed = ff_network_sleep_interruptible(1000U * 1000 * reconnect_delay, &h->interrupt_callback);
325 if (location_changed != AVERROR(ETIMEDOUT))
326 goto fail;
327 reconnect_delay = 1 + 2 * reconnect_delay;
328
329 /* restore the offset (http_connect resets it) */
330 s->off = off;
331
332 ffurl_closep(&s->hd);
333 goto redo;
334 }
335
336 attempts++;
337 if (s->http_code == 401) {
338 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
339 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
340 ffurl_closep(&s->hd);
341 goto redo;
342 } else
343 goto fail;
344 }
345 if (s->http_code == 407) {
346 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
347 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
348 ffurl_closep(&s->hd);
349 goto redo;
350 } else
351 goto fail;
352 }
353 if ((s->http_code == 301 || s->http_code == 302 ||
354 s->http_code == 303 || s->http_code == 307 || s->http_code == 308) &&
355 location_changed == 1) {
356 /* url moved, get next */
357 ffurl_closep(&s->hd);
358 if (redirects++ >= MAX_REDIRECTS)
359 return AVERROR(EIO);
360 /* Restart the authentication process with the new target, which
361 * might use a different auth mechanism. */
362 memset(&s->auth_state, 0, sizeof(s->auth_state));
363 attempts = 0;
364 location_changed = 0;
365 goto redo;
366 }
367 return 0;
368
369 fail:
370 if (s->hd)
371 ffurl_closep(&s->hd);
372 if (location_changed < 0)
373 return location_changed;
374 return ff_http_averror(s->http_code, AVERROR(EIO));
375 }
ff_http_get_shutdown_status(URLContext * h)376 int ff_http_get_shutdown_status(URLContext *h)
377 {
378 int ret = 0;
379 HTTPContext *s = h->priv_data;
380
381 /* flush the receive buffer when it is write only mode */
382 char buf[1024];
383 int read_ret;
384 read_ret = ffurl_read(s->hd, buf, sizeof(buf));
385 if (read_ret < 0) {
386 ret = read_ret;
387 }
388
389 return ret;
390 }
391
ff_http_do_new_request(URLContext * h,const char * uri)392 int ff_http_do_new_request(URLContext *h, const char *uri) {
393 return ff_http_do_new_request2(h, uri, NULL);
394 }
395
ff_http_do_new_request2(URLContext * h,const char * uri,AVDictionary ** opts)396 int ff_http_do_new_request2(URLContext *h, const char *uri, AVDictionary **opts)
397 {
398 HTTPContext *s = h->priv_data;
399 AVDictionary *options = NULL;
400 int ret;
401 char hostname1[1024], hostname2[1024], proto1[10], proto2[10];
402 int port1, port2;
403
404 if (!h->prot ||
405 !(!strcmp(h->prot->name, "http") ||
406 !strcmp(h->prot->name, "https")))
407 return AVERROR(EINVAL);
408
409 av_url_split(proto1, sizeof(proto1), NULL, 0,
410 hostname1, sizeof(hostname1), &port1,
411 NULL, 0, s->location);
412 av_url_split(proto2, sizeof(proto2), NULL, 0,
413 hostname2, sizeof(hostname2), &port2,
414 NULL, 0, uri);
415 if (port1 != port2 || strncmp(hostname1, hostname2, sizeof(hostname2)) != 0) {
416 av_log(h, AV_LOG_ERROR, "Cannot reuse HTTP connection for different host: %s:%d != %s:%d\n",
417 hostname1, port1,
418 hostname2, port2
419 );
420 return AVERROR(EINVAL);
421 }
422
423 if (!s->end_chunked_post) {
424 ret = http_shutdown(h, h->flags);
425 if (ret < 0)
426 return ret;
427 }
428
429 if (s->willclose)
430 return AVERROR_EOF;
431
432 s->end_chunked_post = 0;
433 s->chunkend = 0;
434 s->off = 0;
435 s->icy_data_read = 0;
436 av_free(s->location);
437 s->location = av_strdup(uri);
438 if (!s->location)
439 return AVERROR(ENOMEM);
440
441 if ((ret = av_opt_set_dict(s, opts)) < 0)
442 return ret;
443
444 av_log(s, AV_LOG_INFO, "Opening \'%s\' for %s\n", uri, h->flags & AVIO_FLAG_WRITE ? "writing" : "reading");
445 ret = http_open_cnx(h, &options);
446 av_dict_free(&options);
447 return ret;
448 }
449
ff_http_averror(int status_code,int default_averror)450 int ff_http_averror(int status_code, int default_averror)
451 {
452 switch (status_code) {
453 case 400: return AVERROR_HTTP_BAD_REQUEST;
454 case 401: return AVERROR_HTTP_UNAUTHORIZED;
455 case 403: return AVERROR_HTTP_FORBIDDEN;
456 case 404: return AVERROR_HTTP_NOT_FOUND;
457 default: break;
458 }
459 if (status_code >= 400 && status_code <= 499)
460 return AVERROR_HTTP_OTHER_4XX;
461 else if (status_code >= 500)
462 return AVERROR_HTTP_SERVER_ERROR;
463 else
464 return default_averror;
465 }
466
http_write_reply(URLContext * h,int status_code)467 static int http_write_reply(URLContext* h, int status_code)
468 {
469 int ret, body = 0, reply_code, message_len;
470 const char *reply_text, *content_type;
471 HTTPContext *s = h->priv_data;
472 char message[BUFFER_SIZE];
473 content_type = "text/plain";
474
475 if (status_code < 0)
476 body = 1;
477 switch (status_code) {
478 case AVERROR_HTTP_BAD_REQUEST:
479 case 400:
480 reply_code = 400;
481 reply_text = "Bad Request";
482 break;
483 case AVERROR_HTTP_FORBIDDEN:
484 case 403:
485 reply_code = 403;
486 reply_text = "Forbidden";
487 break;
488 case AVERROR_HTTP_NOT_FOUND:
489 case 404:
490 reply_code = 404;
491 reply_text = "Not Found";
492 break;
493 case 200:
494 reply_code = 200;
495 reply_text = "OK";
496 content_type = s->content_type ? s->content_type : "application/octet-stream";
497 break;
498 case AVERROR_HTTP_SERVER_ERROR:
499 case 500:
500 reply_code = 500;
501 reply_text = "Internal server error";
502 break;
503 default:
504 return AVERROR(EINVAL);
505 }
506 if (body) {
507 s->chunked_post = 0;
508 message_len = snprintf(message, sizeof(message),
509 "HTTP/1.1 %03d %s\r\n"
510 "Content-Type: %s\r\n"
511 "Content-Length: %"SIZE_SPECIFIER"\r\n"
512 "%s"
513 "\r\n"
514 "%03d %s\r\n",
515 reply_code,
516 reply_text,
517 content_type,
518 strlen(reply_text) + 6, // 3 digit status code + space + \r\n
519 s->headers ? s->headers : "",
520 reply_code,
521 reply_text);
522 } else {
523 s->chunked_post = 1;
524 message_len = snprintf(message, sizeof(message),
525 "HTTP/1.1 %03d %s\r\n"
526 "Content-Type: %s\r\n"
527 "Transfer-Encoding: chunked\r\n"
528 "%s"
529 "\r\n",
530 reply_code,
531 reply_text,
532 content_type,
533 s->headers ? s->headers : "");
534 }
535 av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message);
536 if ((ret = ffurl_write(s->hd, message, message_len)) < 0)
537 return ret;
538 return 0;
539 }
540
handle_http_errors(URLContext * h,int error)541 static void handle_http_errors(URLContext *h, int error)
542 {
543 av_assert0(error < 0);
544 http_write_reply(h, error);
545 }
546
http_handshake(URLContext * c)547 static int http_handshake(URLContext *c)
548 {
549 int ret, err, new_location;
550 HTTPContext *ch = c->priv_data;
551 URLContext *cl = ch->hd;
552 switch (ch->handshake_step) {
553 case LOWER_PROTO:
554 av_log(c, AV_LOG_TRACE, "Lower protocol\n");
555 if ((ret = ffurl_handshake(cl)) > 0)
556 return 2 + ret;
557 if (ret < 0)
558 return ret;
559 ch->handshake_step = READ_HEADERS;
560 ch->is_connected_server = 1;
561 return 2;
562 case READ_HEADERS:
563 av_log(c, AV_LOG_TRACE, "Read headers\n");
564 if ((err = http_read_header(c, &new_location)) < 0) {
565 handle_http_errors(c, err);
566 return err;
567 }
568 ch->handshake_step = WRITE_REPLY_HEADERS;
569 return 1;
570 case WRITE_REPLY_HEADERS:
571 av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code);
572 if ((err = http_write_reply(c, ch->reply_code)) < 0)
573 return err;
574 ch->handshake_step = FINISH;
575 return 1;
576 case FINISH:
577 return 0;
578 }
579 // this should never be reached.
580 return AVERROR(EINVAL);
581 }
582
http_listen(URLContext * h,const char * uri,int flags,AVDictionary ** options)583 static int http_listen(URLContext *h, const char *uri, int flags,
584 AVDictionary **options) {
585 HTTPContext *s = h->priv_data;
586 int ret;
587 char hostname[1024], proto[10];
588 char lower_url[100];
589 const char *lower_proto = "tcp";
590 int port;
591 av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
592 NULL, 0, uri);
593 if (!strcmp(proto, "https"))
594 lower_proto = "tls";
595 ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port,
596 NULL);
597 if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0)
598 goto fail;
599 if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
600 &h->interrupt_callback, options,
601 h->protocol_whitelist, h->protocol_blacklist, h
602 )) < 0)
603 goto fail;
604 s->handshake_step = LOWER_PROTO;
605 if (s->listen == HTTP_SINGLE) { /* single client */
606 s->reply_code = 200;
607 while ((ret = http_handshake(h)) > 0);
608 }
609 fail:
610 av_dict_free(&s->chained_options);
611 return ret;
612 }
613
http_open(URLContext * h,const char * uri,int flags,AVDictionary ** options)614 static int http_open(URLContext *h, const char *uri, int flags,
615 AVDictionary **options)
616 {
617 HTTPContext *s = h->priv_data;
618 int ret;
619
620 if( s->seekable == 1 )
621 h->is_streamed = 0;
622 else
623 h->is_streamed = 1;
624
625 s->filesize = UINT64_MAX;
626 s->location = av_strdup(uri);
627 if (!s->location)
628 return AVERROR(ENOMEM);
629 if (options)
630 av_dict_copy(&s->chained_options, *options, 0);
631
632 if (s->headers) {
633 int len = strlen(s->headers);
634 if (len < 2 || strcmp("\r\n", s->headers + len - 2)) {
635 av_log(h, AV_LOG_WARNING,
636 "No trailing CRLF found in HTTP header. Adding it.\n");
637 ret = av_reallocp(&s->headers, len + 3);
638 if (ret < 0)
639 goto bail_out;
640 s->headers[len] = '\r';
641 s->headers[len + 1] = '\n';
642 s->headers[len + 2] = '\0';
643 }
644 }
645
646 if (s->listen) {
647 return http_listen(h, uri, flags, options);
648 }
649 ret = http_open_cnx(h, options);
650 bail_out:
651 if (ret < 0)
652 av_dict_free(&s->chained_options);
653 return ret;
654 }
655
http_accept(URLContext * s,URLContext ** c)656 static int http_accept(URLContext *s, URLContext **c)
657 {
658 int ret;
659 HTTPContext *sc = s->priv_data;
660 HTTPContext *cc;
661 URLContext *sl = sc->hd;
662 URLContext *cl = NULL;
663
664 av_assert0(sc->listen);
665 if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0)
666 goto fail;
667 cc = (*c)->priv_data;
668 if ((ret = ffurl_accept(sl, &cl)) < 0)
669 goto fail;
670 cc->hd = cl;
671 cc->is_multi_client = 1;
672 return 0;
673 fail:
674 if (c) {
675 ffurl_closep(c);
676 }
677 return ret;
678 }
679
http_getc(HTTPContext * s)680 static int http_getc(HTTPContext *s)
681 {
682 int len;
683 if (s->buf_ptr >= s->buf_end) {
684 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
685 if (len < 0) {
686 return len;
687 } else if (len == 0) {
688 return AVERROR_EOF;
689 } else {
690 s->buf_ptr = s->buffer;
691 s->buf_end = s->buffer + len;
692 }
693 }
694 return *s->buf_ptr++;
695 }
696
http_get_line(HTTPContext * s,char * line,int line_size)697 static int http_get_line(HTTPContext *s, char *line, int line_size)
698 {
699 int ch;
700 char *q;
701
702 q = line;
703 for (;;) {
704 ch = http_getc(s);
705 if (ch < 0)
706 return ch;
707 if (ch == '\n') {
708 /* process line */
709 if (q > line && q[-1] == '\r')
710 q--;
711 *q = '\0';
712
713 return 0;
714 } else {
715 if ((q - line) < line_size - 1)
716 *q++ = ch;
717 }
718 }
719 }
720
check_http_code(URLContext * h,int http_code,const char * end)721 static int check_http_code(URLContext *h, int http_code, const char *end)
722 {
723 HTTPContext *s = h->priv_data;
724 /* error codes are 4xx and 5xx, but regard 401 as a success, so we
725 * don't abort until all headers have been parsed. */
726 if (http_code >= 400 && http_code < 600 &&
727 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
728 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
729 end += strspn(end, SPACE_CHARS);
730 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
731 return ff_http_averror(http_code, AVERROR(EIO));
732 }
733 return 0;
734 }
735
parse_location(HTTPContext * s,const char * p)736 static int parse_location(HTTPContext *s, const char *p)
737 {
738 char redirected_location[MAX_URL_SIZE], *new_loc;
739 ff_make_absolute_url(redirected_location, sizeof(redirected_location),
740 s->location, p);
741 new_loc = av_strdup(redirected_location);
742 if (!new_loc)
743 return AVERROR(ENOMEM);
744 av_free(s->location);
745 s->location = new_loc;
746 return 0;
747 }
748
749 /* "bytes $from-$to/$document_size" */
parse_content_range(URLContext * h,const char * p)750 static void parse_content_range(URLContext *h, const char *p)
751 {
752 HTTPContext *s = h->priv_data;
753 const char *slash;
754
755 if (!strncmp(p, "bytes ", 6)) {
756 p += 6;
757 s->off = strtoull(p, NULL, 10);
758 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
759 s->filesize = strtoull(slash + 1, NULL, 10);
760 }
761 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647))
762 h->is_streamed = 0; /* we _can_ in fact seek */
763 }
764
parse_content_encoding(URLContext * h,const char * p)765 static int parse_content_encoding(URLContext *h, const char *p)
766 {
767 if (!av_strncasecmp(p, "gzip", 4) ||
768 !av_strncasecmp(p, "deflate", 7)) {
769 #if CONFIG_ZLIB
770 HTTPContext *s = h->priv_data;
771
772 s->compressed = 1;
773 inflateEnd(&s->inflate_stream);
774 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
775 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
776 s->inflate_stream.msg);
777 return AVERROR(ENOSYS);
778 }
779 if (zlibCompileFlags() & (1 << 17)) {
780 av_log(h, AV_LOG_WARNING,
781 "Your zlib was compiled without gzip support.\n");
782 return AVERROR(ENOSYS);
783 }
784 #else
785 av_log(h, AV_LOG_WARNING,
786 "Compressed (%s) content, need zlib with gzip support\n", p);
787 return AVERROR(ENOSYS);
788 #endif /* CONFIG_ZLIB */
789 } else if (!av_strncasecmp(p, "identity", 8)) {
790 // The normal, no-encoding case (although servers shouldn't include
791 // the header at all if this is the case).
792 } else {
793 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
794 }
795 return 0;
796 }
797
798 // Concat all Icy- header lines
parse_icy(HTTPContext * s,const char * tag,const char * p)799 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
800 {
801 int len = 4 + strlen(p) + strlen(tag);
802 int is_first = !s->icy_metadata_headers;
803 int ret;
804
805 av_dict_set(&s->metadata, tag, p, 0);
806
807 if (s->icy_metadata_headers)
808 len += strlen(s->icy_metadata_headers);
809
810 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
811 return ret;
812
813 if (is_first)
814 *s->icy_metadata_headers = '\0';
815
816 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
817
818 return 0;
819 }
820
parse_set_cookie_expiry_time(const char * exp_str,struct tm * buf)821 static int parse_set_cookie_expiry_time(const char *exp_str, struct tm *buf)
822 {
823 char exp_buf[MAX_EXPIRY];
824 int i, j, exp_buf_len = MAX_EXPIRY-1;
825 char *expiry;
826
827 // strip off any punctuation or whitespace
828 for (i = 0, j = 0; exp_str[i] != '\0' && j < exp_buf_len; i++) {
829 if ((exp_str[i] >= '0' && exp_str[i] <= '9') ||
830 (exp_str[i] >= 'A' && exp_str[i] <= 'Z') ||
831 (exp_str[i] >= 'a' && exp_str[i] <= 'z')) {
832 exp_buf[j] = exp_str[i];
833 j++;
834 }
835 }
836 exp_buf[j] = '\0';
837 expiry = exp_buf;
838
839 // move the string beyond the day of week
840 while ((*expiry < '0' || *expiry > '9') && *expiry != '\0')
841 expiry++;
842
843 return av_small_strptime(expiry, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL);
844 }
845
parse_set_cookie(const char * set_cookie,AVDictionary ** dict)846 static int parse_set_cookie(const char *set_cookie, AVDictionary **dict)
847 {
848 char *param, *next_param, *cstr, *back;
849 char *saveptr = NULL;
850
851 if (!set_cookie[0])
852 return 0;
853
854 if (!(cstr = av_strdup(set_cookie)))
855 return AVERROR(EINVAL);
856
857 // strip any trailing whitespace
858 back = &cstr[strlen(cstr)-1];
859 while (strchr(WHITESPACES, *back)) {
860 *back='\0';
861 if (back == cstr)
862 break;
863 back--;
864 }
865
866 next_param = cstr;
867 while ((param = av_strtok(next_param, ";", &saveptr))) {
868 char *name, *value;
869 next_param = NULL;
870 param += strspn(param, WHITESPACES);
871 if ((name = av_strtok(param, "=", &value))) {
872 if (av_dict_set(dict, name, value, 0) < 0) {
873 av_free(cstr);
874 return -1;
875 }
876 }
877 }
878
879 av_free(cstr);
880 return 0;
881 }
882
parse_cookie(HTTPContext * s,const char * p,AVDictionary ** cookies)883 static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies)
884 {
885 AVDictionary *new_params = NULL;
886 AVDictionaryEntry *e, *cookie_entry;
887 char *eql, *name;
888
889 // ensure the cookie is parsable
890 if (parse_set_cookie(p, &new_params))
891 return -1;
892
893 // if there is no cookie value there is nothing to parse
894 cookie_entry = av_dict_get(new_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
895 if (!cookie_entry || !cookie_entry->value) {
896 av_dict_free(&new_params);
897 return -1;
898 }
899
900 // ensure the cookie is not expired or older than an existing value
901 if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) {
902 struct tm new_tm = {0};
903 if (!parse_set_cookie_expiry_time(e->value, &new_tm)) {
904 AVDictionaryEntry *e2;
905
906 // if the cookie has already expired ignore it
907 if (av_timegm(&new_tm) < av_gettime() / 1000000) {
908 av_dict_free(&new_params);
909 return 0;
910 }
911
912 // only replace an older cookie with the same name
913 e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0);
914 if (e2 && e2->value) {
915 AVDictionary *old_params = NULL;
916 if (!parse_set_cookie(p, &old_params)) {
917 e2 = av_dict_get(old_params, "expires", NULL, 0);
918 if (e2 && e2->value) {
919 struct tm old_tm = {0};
920 if (!parse_set_cookie_expiry_time(e->value, &old_tm)) {
921 if (av_timegm(&new_tm) < av_timegm(&old_tm)) {
922 av_dict_free(&new_params);
923 av_dict_free(&old_params);
924 return -1;
925 }
926 }
927 }
928 }
929 av_dict_free(&old_params);
930 }
931 }
932 }
933 av_dict_free(&new_params);
934
935 // duplicate the cookie name (dict will dupe the value)
936 if (!(eql = strchr(p, '='))) return AVERROR(EINVAL);
937 if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM);
938
939 // add the cookie to the dictionary
940 av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY);
941
942 return 0;
943 }
944
cookie_string(AVDictionary * dict,char ** cookies)945 static int cookie_string(AVDictionary *dict, char **cookies)
946 {
947 AVDictionaryEntry *e = NULL;
948 int len = 1;
949
950 // determine how much memory is needed for the cookies string
951 while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
952 len += strlen(e->key) + strlen(e->value) + 1;
953
954 // reallocate the cookies
955 e = NULL;
956 if (*cookies) av_free(*cookies);
957 *cookies = av_malloc(len);
958 if (!*cookies) return AVERROR(ENOMEM);
959 *cookies[0] = '\0';
960
961 // write out the cookies
962 while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))
963 av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value);
964
965 return 0;
966 }
967
process_line(URLContext * h,char * line,int line_count,int * new_location)968 static int process_line(URLContext *h, char *line, int line_count,
969 int *new_location)
970 {
971 HTTPContext *s = h->priv_data;
972 const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET";
973 char *tag, *p, *end, *method, *resource, *version;
974 int ret;
975
976 /* end of header */
977 if (line[0] == '\0') {
978 s->end_header = 1;
979 return 0;
980 }
981
982 p = line;
983 if (line_count == 0) {
984 if (s->is_connected_server) {
985 // HTTP method
986 method = p;
987 while (*p && !av_isspace(*p))
988 p++;
989 *(p++) = '\0';
990 av_log(h, AV_LOG_TRACE, "Received method: %s\n", method);
991 if (s->method) {
992 if (av_strcasecmp(s->method, method)) {
993 av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n",
994 s->method, method);
995 return ff_http_averror(400, AVERROR(EIO));
996 }
997 } else {
998 // use autodetected HTTP method to expect
999 av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method);
1000 if (av_strcasecmp(auto_method, method)) {
1001 av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match "
1002 "(%s autodetected %s received)\n", auto_method, method);
1003 return ff_http_averror(400, AVERROR(EIO));
1004 }
1005 if (!(s->method = av_strdup(method)))
1006 return AVERROR(ENOMEM);
1007 }
1008
1009 // HTTP resource
1010 while (av_isspace(*p))
1011 p++;
1012 resource = p;
1013 while (*p && !av_isspace(*p))
1014 p++;
1015 *(p++) = '\0';
1016 av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource);
1017 if (!(s->resource = av_strdup(resource)))
1018 return AVERROR(ENOMEM);
1019
1020 // HTTP version
1021 while (av_isspace(*p))
1022 p++;
1023 version = p;
1024 while (*p && !av_isspace(*p))
1025 p++;
1026 *p = '\0';
1027 if (av_strncasecmp(version, "HTTP/", 5)) {
1028 av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n");
1029 return ff_http_averror(400, AVERROR(EIO));
1030 }
1031 av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version);
1032 } else {
1033 if (av_strncasecmp(p, "HTTP/1.0", 8) == 0)
1034 s->willclose = 1;
1035 while (*p != '/' && *p != '\0')
1036 p++;
1037 while (*p == '/')
1038 p++;
1039 av_freep(&s->http_version);
1040 s->http_version = av_strndup(p, 3);
1041 while (!av_isspace(*p) && *p != '\0')
1042 p++;
1043 while (av_isspace(*p))
1044 p++;
1045 s->http_code = strtol(p, &end, 10);
1046
1047 av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code);
1048
1049 if ((ret = check_http_code(h, s->http_code, end)) < 0)
1050 return ret;
1051 }
1052 } else {
1053 while (*p != '\0' && *p != ':')
1054 p++;
1055 if (*p != ':')
1056 return 1;
1057
1058 *p = '\0';
1059 tag = line;
1060 p++;
1061 while (av_isspace(*p))
1062 p++;
1063 if (!av_strcasecmp(tag, "Location")) {
1064 if ((ret = parse_location(s, p)) < 0)
1065 return ret;
1066 *new_location = 1;
1067 } else if (!av_strcasecmp(tag, "Content-Length") &&
1068 s->filesize == UINT64_MAX) {
1069 s->filesize = strtoull(p, NULL, 10);
1070 } else if (!av_strcasecmp(tag, "Content-Range")) {
1071 parse_content_range(h, p);
1072 } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
1073 !strncmp(p, "bytes", 5) &&
1074 s->seekable == -1) {
1075 h->is_streamed = 0;
1076 } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
1077 !av_strncasecmp(p, "chunked", 7)) {
1078 s->filesize = UINT64_MAX;
1079 s->chunksize = 0;
1080 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
1081 ff_http_auth_handle_header(&s->auth_state, tag, p);
1082 } else if (!av_strcasecmp(tag, "Authentication-Info")) {
1083 ff_http_auth_handle_header(&s->auth_state, tag, p);
1084 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
1085 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p);
1086 } else if (!av_strcasecmp(tag, "Connection")) {
1087 if (!strcmp(p, "close"))
1088 s->willclose = 1;
1089 } else if (!av_strcasecmp(tag, "Server")) {
1090 if (!av_strcasecmp(p, "AkamaiGHost")) {
1091 s->is_akamai = 1;
1092 } else if (!av_strncasecmp(p, "MediaGateway", 12)) {
1093 s->is_mediagateway = 1;
1094 }
1095 } else if (!av_strcasecmp(tag, "Content-Type")) {
1096 av_free(s->mime_type);
1097 s->mime_type = av_strdup(p);
1098 } else if (!av_strcasecmp(tag, "Set-Cookie")) {
1099 if (parse_cookie(s, p, &s->cookie_dict))
1100 av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p);
1101 } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
1102 s->icy_metaint = strtoull(p, NULL, 10);
1103 } else if (!av_strncasecmp(tag, "Icy-", 4)) {
1104 if ((ret = parse_icy(s, tag, p)) < 0)
1105 return ret;
1106 } else if (!av_strcasecmp(tag, "Content-Encoding")) {
1107 if ((ret = parse_content_encoding(h, p)) < 0)
1108 return ret;
1109 }
1110 }
1111 return 1;
1112 }
1113
1114 /**
1115 * Create a string containing cookie values for use as a HTTP cookie header
1116 * field value for a particular path and domain from the cookie values stored in
1117 * the HTTP protocol context. The cookie string is stored in *cookies, and may
1118 * be NULL if there are no valid cookies.
1119 *
1120 * @return a negative value if an error condition occurred, 0 otherwise
1121 */
get_cookies(HTTPContext * s,char ** cookies,const char * path,const char * domain)1122 static int get_cookies(HTTPContext *s, char **cookies, const char *path,
1123 const char *domain)
1124 {
1125 // cookie strings will look like Set-Cookie header field values. Multiple
1126 // Set-Cookie fields will result in multiple values delimited by a newline
1127 int ret = 0;
1128 char *cookie, *set_cookies, *next;
1129 char *saveptr = NULL;
1130
1131 // destroy any cookies in the dictionary.
1132 av_dict_free(&s->cookie_dict);
1133
1134 if (!s->cookies)
1135 return 0;
1136
1137 next = set_cookies = av_strdup(s->cookies);
1138 if (!next)
1139 return AVERROR(ENOMEM);
1140
1141 *cookies = NULL;
1142 while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
1143 AVDictionary *cookie_params = NULL;
1144 AVDictionaryEntry *cookie_entry, *e;
1145
1146 next = NULL;
1147 // store the cookie in a dict in case it is updated in the response
1148 if (parse_cookie(s, cookie, &s->cookie_dict))
1149 av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);
1150
1151 // continue on to the next cookie if this one cannot be parsed
1152 if (parse_set_cookie(cookie, &cookie_params))
1153 goto skip_cookie;
1154
1155 // if the cookie has no value, skip it
1156 cookie_entry = av_dict_get(cookie_params, "", NULL, AV_DICT_IGNORE_SUFFIX);
1157 if (!cookie_entry || !cookie_entry->value)
1158 goto skip_cookie;
1159
1160 // if the cookie has expired, don't add it
1161 if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
1162 struct tm tm_buf = {0};
1163 if (!parse_set_cookie_expiry_time(e->value, &tm_buf)) {
1164 if (av_timegm(&tm_buf) < av_gettime() / 1000000)
1165 goto skip_cookie;
1166 }
1167 }
1168
1169 // if no domain in the cookie assume it appied to this request
1170 if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
1171 // find the offset comparison is on the min domain (b.com, not a.b.com)
1172 int domain_offset = strlen(domain) - strlen(e->value);
1173 if (domain_offset < 0)
1174 goto skip_cookie;
1175
1176 // match the cookie domain
1177 if (av_strcasecmp(&domain[domain_offset], e->value))
1178 goto skip_cookie;
1179 }
1180
1181 // ensure this cookie matches the path
1182 e = av_dict_get(cookie_params, "path", NULL, 0);
1183 if (!e || av_strncasecmp(path, e->value, strlen(e->value)))
1184 goto skip_cookie;
1185
1186 // cookie parameters match, so copy the value
1187 if (!*cookies) {
1188 *cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value);
1189 } else {
1190 char *tmp = *cookies;
1191 *cookies = av_asprintf("%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value);
1192 av_free(tmp);
1193 }
1194 if (!*cookies)
1195 ret = AVERROR(ENOMEM);
1196
1197 skip_cookie:
1198 av_dict_free(&cookie_params);
1199 }
1200
1201 av_free(set_cookies);
1202
1203 return ret;
1204 }
1205
has_header(const char * str,const char * header)1206 static inline int has_header(const char *str, const char *header)
1207 {
1208 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
1209 if (!str)
1210 return 0;
1211 return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
1212 }
1213
http_read_header(URLContext * h,int * new_location)1214 static int http_read_header(URLContext *h, int *new_location)
1215 {
1216 HTTPContext *s = h->priv_data;
1217 char line[MAX_URL_SIZE];
1218 int err = 0;
1219
1220 s->chunksize = UINT64_MAX;
1221
1222 for (;;) {
1223 if ((err = http_get_line(s, line, sizeof(line))) < 0)
1224 return err;
1225
1226 av_log(h, AV_LOG_TRACE, "header='%s'\n", line);
1227
1228 err = process_line(h, line, s->line_count, new_location);
1229 if (err < 0)
1230 return err;
1231 if (err == 0)
1232 break;
1233 s->line_count++;
1234 }
1235
1236 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000)
1237 h->is_streamed = 1; /* we can in fact _not_ seek */
1238
1239 // add any new cookies into the existing cookie string
1240 cookie_string(s->cookie_dict, &s->cookies);
1241 av_dict_free(&s->cookie_dict);
1242
1243 return err;
1244 }
1245
1246 /**
1247 * Escape unsafe characters in path in order to pass them safely to the HTTP
1248 * request. Insipred by the algorithm in GNU wget:
1249 * - escape "%" characters not followed by two hex digits
1250 * - escape all "unsafe" characters except which are also "reserved"
1251 * - pass through everything else
1252 */
bprint_escaped_path(AVBPrint * bp,const char * path)1253 static void bprint_escaped_path(AVBPrint *bp, const char *path)
1254 {
1255 #define NEEDS_ESCAPE(ch) \
1256 ((ch) <= ' ' || (ch) >= '\x7f' || \
1257 (ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
1258 (ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')
1259 while (*path) {
1260 char buf[1024];
1261 char *q = buf;
1262 while (*path && q - buf < sizeof(buf) - 4) {
1263 if (path[0] == '%' && av_isxdigit(path[1]) && av_isxdigit(path[2])) {
1264 *q++ = *path++;
1265 *q++ = *path++;
1266 *q++ = *path++;
1267 } else if (NEEDS_ESCAPE(*path)) {
1268 q += snprintf(q, 4, "%%%02X", (uint8_t)*path++);
1269 } else {
1270 *q++ = *path++;
1271 }
1272 }
1273 av_bprint_append_data(bp, buf, q - buf);
1274 }
1275 }
1276
http_connect(URLContext * h,const char * path,const char * local_path,const char * hoststr,const char * auth,const char * proxyauth,int * new_location)1277 static int http_connect(URLContext *h, const char *path, const char *local_path,
1278 const char *hoststr, const char *auth,
1279 const char *proxyauth, int *new_location)
1280 {
1281 HTTPContext *s = h->priv_data;
1282 int post, err;
1283 AVBPrint request;
1284 char *authstr = NULL, *proxyauthstr = NULL;
1285 uint64_t off = s->off;
1286 const char *method;
1287 int send_expect_100 = 0;
1288
1289 av_bprint_init_for_buffer(&request, s->buffer, sizeof(s->buffer));
1290
1291 /* send http header */
1292 post = h->flags & AVIO_FLAG_WRITE;
1293
1294 if (s->post_data) {
1295 /* force POST method and disable chunked encoding when
1296 * custom HTTP post data is set */
1297 post = 1;
1298 s->chunked_post = 0;
1299 }
1300
1301 if (s->method)
1302 method = s->method;
1303 else
1304 method = post ? "POST" : "GET";
1305
1306 authstr = ff_http_auth_create_response(&s->auth_state, auth,
1307 local_path, method);
1308 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
1309 local_path, method);
1310
1311 if (post && !s->post_data) {
1312 if (s->send_expect_100 != -1) {
1313 send_expect_100 = s->send_expect_100;
1314 } else {
1315 send_expect_100 = 0;
1316 /* The user has supplied authentication but we don't know the auth type,
1317 * send Expect: 100-continue to get the 401 response including the
1318 * WWW-Authenticate header, or an 100 continue if no auth actually
1319 * is needed. */
1320 if (auth && *auth &&
1321 s->auth_state.auth_type == HTTP_AUTH_NONE &&
1322 s->http_code != 401)
1323 send_expect_100 = 1;
1324 }
1325 }
1326
1327 av_bprintf(&request, "%s ", method);
1328 bprint_escaped_path(&request, path);
1329 av_bprintf(&request, " HTTP/1.1\r\n");
1330
1331 if (post && s->chunked_post)
1332 av_bprintf(&request, "Transfer-Encoding: chunked\r\n");
1333 /* set default headers if needed */
1334 if (!has_header(s->headers, "\r\nUser-Agent: "))
1335 av_bprintf(&request, "User-Agent: %s\r\n", s->user_agent);
1336 if (s->referer) {
1337 /* set default headers if needed */
1338 if (!has_header(s->headers, "\r\nReferer: "))
1339 av_bprintf(&request, "Referer: %s\r\n", s->referer);
1340 }
1341 if (!has_header(s->headers, "\r\nAccept: "))
1342 av_bprintf(&request, "Accept: */*\r\n");
1343 // Note: we send this on purpose even when s->off is 0 when we're probing,
1344 // since it allows us to detect more reliably if a (non-conforming)
1345 // server supports seeking by analysing the reply headers.
1346 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) {
1347 av_bprintf(&request, "Range: bytes=%"PRIu64"-", s->off);
1348 if (s->end_off)
1349 av_bprintf(&request, "%"PRId64, s->end_off - 1);
1350 av_bprintf(&request, "\r\n");
1351 }
1352 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
1353 av_bprintf(&request, "Expect: 100-continue\r\n");
1354
1355 if (!has_header(s->headers, "\r\nConnection: "))
1356 av_bprintf(&request, "Connection: %s\r\n", s->multiple_requests ? "keep-alive" : "close");
1357
1358 if (!has_header(s->headers, "\r\nHost: "))
1359 av_bprintf(&request, "Host: %s\r\n", hoststr);
1360 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
1361 av_bprintf(&request, "Content-Length: %d\r\n", s->post_datalen);
1362
1363 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
1364 av_bprintf(&request, "Content-Type: %s\r\n", s->content_type);
1365 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) {
1366 char *cookies = NULL;
1367 if (!get_cookies(s, &cookies, path, hoststr) && cookies) {
1368 av_bprintf(&request, "Cookie: %s\r\n", cookies);
1369 av_free(cookies);
1370 }
1371 }
1372 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
1373 av_bprintf(&request, "Icy-MetaData: 1\r\n");
1374
1375 /* now add in custom headers */
1376 if (s->headers)
1377 av_bprintf(&request, "%s", s->headers);
1378
1379 if (authstr)
1380 av_bprintf(&request, "%s", authstr);
1381 if (proxyauthstr)
1382 av_bprintf(&request, "Proxy-%s", proxyauthstr);
1383 av_bprintf(&request, "\r\n");
1384
1385 av_log(h, AV_LOG_DEBUG, "request: %s\n", request.str);
1386
1387 if (!av_bprint_is_complete(&request)) {
1388 av_log(h, AV_LOG_ERROR, "overlong headers\n");
1389 err = AVERROR(EINVAL);
1390 goto done;
1391 }
1392
1393 if ((err = ffurl_write(s->hd, request.str, request.len)) < 0)
1394 goto done;
1395
1396 if (s->post_data)
1397 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
1398 goto done;
1399
1400 /* init input buffer */
1401 s->buf_ptr = s->buffer;
1402 s->buf_end = s->buffer;
1403 s->line_count = 0;
1404 s->off = 0;
1405 s->icy_data_read = 0;
1406 s->filesize = UINT64_MAX;
1407 s->willclose = 0;
1408 s->end_chunked_post = 0;
1409 s->end_header = 0;
1410 #if CONFIG_ZLIB
1411 s->compressed = 0;
1412 #endif
1413 if (post && !s->post_data && !send_expect_100) {
1414 /* Pretend that it did work. We didn't read any header yet, since
1415 * we've still to send the POST data, but the code calling this
1416 * function will check http_code after we return. */
1417 s->http_code = 200;
1418 err = 0;
1419 goto done;
1420 }
1421
1422 /* wait for header */
1423 err = http_read_header(h, new_location);
1424 if (err < 0)
1425 goto done;
1426
1427 if (*new_location)
1428 s->off = off;
1429
1430 err = (off == s->off) ? 0 : -1;
1431 done:
1432 av_freep(&authstr);
1433 av_freep(&proxyauthstr);
1434 return err;
1435 }
1436
http_buf_read(URLContext * h,uint8_t * buf,int size)1437 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
1438 {
1439 HTTPContext *s = h->priv_data;
1440 int len;
1441
1442 if (s->chunksize != UINT64_MAX) {
1443 if (s->chunkend) {
1444 return AVERROR_EOF;
1445 }
1446 if (!s->chunksize) {
1447 char line[32];
1448 int err;
1449
1450 do {
1451 if ((err = http_get_line(s, line, sizeof(line))) < 0)
1452 return err;
1453 } while (!*line); /* skip CR LF from last chunk */
1454
1455 s->chunksize = strtoull(line, NULL, 16);
1456
1457 av_log(h, AV_LOG_TRACE,
1458 "Chunked encoding data size: %"PRIu64"\n",
1459 s->chunksize);
1460
1461 if (!s->chunksize && s->multiple_requests) {
1462 http_get_line(s, line, sizeof(line)); // read empty chunk
1463 s->chunkend = 1;
1464 return 0;
1465 }
1466 else if (!s->chunksize) {
1467 av_log(h, AV_LOG_DEBUG, "Last chunk received, closing conn\n");
1468 ffurl_closep(&s->hd);
1469 return 0;
1470 }
1471 else if (s->chunksize == UINT64_MAX) {
1472 av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n",
1473 s->chunksize);
1474 return AVERROR(EINVAL);
1475 }
1476 }
1477 size = FFMIN(size, s->chunksize);
1478 }
1479
1480 /* read bytes from input buffer first */
1481 len = s->buf_end - s->buf_ptr;
1482 if (len > 0) {
1483 if (len > size)
1484 len = size;
1485 memcpy(buf, s->buf_ptr, len);
1486 s->buf_ptr += len;
1487 } else {
1488 uint64_t target_end = s->end_off ? s->end_off : s->filesize;
1489 if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end)
1490 return AVERROR_EOF;
1491 len = ffurl_read(s->hd, buf, size);
1492 if ((!len || len == AVERROR_EOF) &&
1493 (!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) {
1494 av_log(h, AV_LOG_ERROR,
1495 "Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n",
1496 s->off, target_end
1497 );
1498 return AVERROR(EIO);
1499 }
1500 }
1501 if (len > 0) {
1502 s->off += len;
1503 if (s->chunksize > 0 && s->chunksize != UINT64_MAX) {
1504 av_assert0(s->chunksize >= len);
1505 s->chunksize -= len;
1506 }
1507 }
1508 return len;
1509 }
1510
1511 #if CONFIG_ZLIB
1512 #define DECOMPRESS_BUF_SIZE (256 * 1024)
http_buf_read_compressed(URLContext * h,uint8_t * buf,int size)1513 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
1514 {
1515 HTTPContext *s = h->priv_data;
1516 int ret;
1517
1518 if (!s->inflate_buffer) {
1519 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
1520 if (!s->inflate_buffer)
1521 return AVERROR(ENOMEM);
1522 }
1523
1524 if (s->inflate_stream.avail_in == 0) {
1525 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
1526 if (read <= 0)
1527 return read;
1528 s->inflate_stream.next_in = s->inflate_buffer;
1529 s->inflate_stream.avail_in = read;
1530 }
1531
1532 s->inflate_stream.avail_out = size;
1533 s->inflate_stream.next_out = buf;
1534
1535 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
1536 if (ret != Z_OK && ret != Z_STREAM_END)
1537 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
1538 ret, s->inflate_stream.msg);
1539
1540 return size - s->inflate_stream.avail_out;
1541 }
1542 #endif /* CONFIG_ZLIB */
1543
1544 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect);
1545
http_read_stream(URLContext * h,uint8_t * buf,int size)1546 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
1547 {
1548 HTTPContext *s = h->priv_data;
1549 int err, new_location, read_ret;
1550 int64_t seek_ret;
1551 int reconnect_delay = 0;
1552
1553 if (!s->hd)
1554 return AVERROR_EOF;
1555
1556 if (s->end_chunked_post && !s->end_header) {
1557 err = http_read_header(h, &new_location);
1558 if (err < 0)
1559 return err;
1560 }
1561
1562 #if CONFIG_ZLIB
1563 if (s->compressed)
1564 return http_buf_read_compressed(h, buf, size);
1565 #endif /* CONFIG_ZLIB */
1566 read_ret = http_buf_read(h, buf, size);
1567 while (read_ret < 0) {
1568 uint64_t target = h->is_streamed ? 0 : s->off;
1569
1570 if (read_ret == AVERROR_EXIT)
1571 break;
1572
1573 if (h->is_streamed && !s->reconnect_streamed)
1574 break;
1575
1576 if (!(s->reconnect && s->filesize > 0 && s->off < s->filesize) &&
1577 !(s->reconnect_at_eof && read_ret == AVERROR_EOF))
1578 break;
1579
1580 if (reconnect_delay > s->reconnect_delay_max)
1581 return AVERROR(EIO);
1582
1583 av_log(h, AV_LOG_WARNING, "Will reconnect at %"PRIu64" in %d second(s), error=%s.\n", s->off, reconnect_delay, av_err2str(read_ret));
1584 err = ff_network_sleep_interruptible(1000U*1000*reconnect_delay, &h->interrupt_callback);
1585 if (err != AVERROR(ETIMEDOUT))
1586 return err;
1587 reconnect_delay = 1 + 2*reconnect_delay;
1588 seek_ret = http_seek_internal(h, target, SEEK_SET, 1);
1589 if (seek_ret >= 0 && seek_ret != target) {
1590 av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRIu64".\n", target);
1591 return read_ret;
1592 }
1593
1594 read_ret = http_buf_read(h, buf, size);
1595 }
1596
1597 return read_ret;
1598 }
1599
1600 // Like http_read_stream(), but no short reads.
1601 // Assumes partial reads are an error.
http_read_stream_all(URLContext * h,uint8_t * buf,int size)1602 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
1603 {
1604 int pos = 0;
1605 while (pos < size) {
1606 int len = http_read_stream(h, buf + pos, size - pos);
1607 if (len < 0)
1608 return len;
1609 pos += len;
1610 }
1611 return pos;
1612 }
1613
update_metadata(URLContext * h,char * data)1614 static void update_metadata(URLContext *h, char *data)
1615 {
1616 char *key;
1617 char *val;
1618 char *end;
1619 char *next = data;
1620 HTTPContext *s = h->priv_data;
1621
1622 while (*next) {
1623 key = next;
1624 val = strstr(key, "='");
1625 if (!val)
1626 break;
1627 end = strstr(val, "';");
1628 if (!end)
1629 break;
1630
1631 *val = '\0';
1632 *end = '\0';
1633 val += 2;
1634
1635 av_dict_set(&s->metadata, key, val, 0);
1636 av_log(h, AV_LOG_VERBOSE, "Metadata update for %s: %s\n", key, val);
1637
1638 next = end + 2;
1639 }
1640 }
1641
store_icy(URLContext * h,int size)1642 static int store_icy(URLContext *h, int size)
1643 {
1644 HTTPContext *s = h->priv_data;
1645 /* until next metadata packet */
1646 uint64_t remaining;
1647
1648 if (s->icy_metaint < s->icy_data_read)
1649 return AVERROR_INVALIDDATA;
1650 remaining = s->icy_metaint - s->icy_data_read;
1651
1652 if (!remaining) {
1653 /* The metadata packet is variable sized. It has a 1 byte header
1654 * which sets the length of the packet (divided by 16). If it's 0,
1655 * the metadata doesn't change. After the packet, icy_metaint bytes
1656 * of normal data follows. */
1657 uint8_t ch;
1658 int len = http_read_stream_all(h, &ch, 1);
1659 if (len < 0)
1660 return len;
1661 if (ch > 0) {
1662 char data[255 * 16 + 1];
1663 int ret;
1664 len = ch * 16;
1665 ret = http_read_stream_all(h, data, len);
1666 if (ret < 0)
1667 return ret;
1668 data[len + 1] = 0;
1669 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
1670 return ret;
1671 update_metadata(h, data);
1672 }
1673 s->icy_data_read = 0;
1674 remaining = s->icy_metaint;
1675 }
1676
1677 return FFMIN(size, remaining);
1678 }
1679
http_read(URLContext * h,uint8_t * buf,int size)1680 static int http_read(URLContext *h, uint8_t *buf, int size)
1681 {
1682 HTTPContext *s = h->priv_data;
1683
1684 if (s->icy_metaint > 0) {
1685 size = store_icy(h, size);
1686 if (size < 0)
1687 return size;
1688 }
1689
1690 size = http_read_stream(h, buf, size);
1691 if (size > 0)
1692 s->icy_data_read += size;
1693 return size;
1694 }
1695
1696 /* used only when posting data */
http_write(URLContext * h,const uint8_t * buf,int size)1697 static int http_write(URLContext *h, const uint8_t *buf, int size)
1698 {
1699 char temp[11] = ""; /* 32-bit hex + CRLF + nul */
1700 int ret;
1701 char crlf[] = "\r\n";
1702 HTTPContext *s = h->priv_data;
1703
1704 if (!s->chunked_post) {
1705 /* non-chunked data is sent without any special encoding */
1706 return ffurl_write(s->hd, buf, size);
1707 }
1708
1709 /* silently ignore zero-size data since chunk encoding that would
1710 * signal EOF */
1711 if (size > 0) {
1712 /* upload data using chunked encoding */
1713 snprintf(temp, sizeof(temp), "%x\r\n", size);
1714
1715 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
1716 (ret = ffurl_write(s->hd, buf, size)) < 0 ||
1717 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
1718 return ret;
1719 }
1720 return size;
1721 }
1722
http_shutdown(URLContext * h,int flags)1723 static int http_shutdown(URLContext *h, int flags)
1724 {
1725 int ret = 0;
1726 char footer[] = "0\r\n\r\n";
1727 HTTPContext *s = h->priv_data;
1728
1729 /* signal end of chunked encoding if used */
1730 if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) ||
1731 ((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) {
1732 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
1733 ret = ret > 0 ? 0 : ret;
1734 /* flush the receive buffer when it is write only mode */
1735 if (!(flags & AVIO_FLAG_READ)) {
1736 char buf[1024];
1737 int read_ret;
1738 s->hd->flags |= AVIO_FLAG_NONBLOCK;
1739 read_ret = ffurl_read(s->hd, buf, sizeof(buf));
1740 s->hd->flags &= ~AVIO_FLAG_NONBLOCK;
1741 if (read_ret < 0 && read_ret != AVERROR(EAGAIN)) {
1742 av_log(h, AV_LOG_ERROR, "URL read error: %s\n", av_err2str(read_ret));
1743 ret = read_ret;
1744 }
1745 }
1746 s->end_chunked_post = 1;
1747 }
1748
1749 return ret;
1750 }
1751
http_close(URLContext * h)1752 static int http_close(URLContext *h)
1753 {
1754 int ret = 0;
1755 HTTPContext *s = h->priv_data;
1756
1757 #if CONFIG_ZLIB
1758 inflateEnd(&s->inflate_stream);
1759 av_freep(&s->inflate_buffer);
1760 #endif /* CONFIG_ZLIB */
1761
1762 if (s->hd && !s->end_chunked_post)
1763 /* Close the write direction by sending the end of chunked encoding. */
1764 ret = http_shutdown(h, h->flags);
1765
1766 if (s->hd)
1767 ffurl_closep(&s->hd);
1768 av_dict_free(&s->chained_options);
1769 return ret;
1770 }
1771
http_seek_internal(URLContext * h,int64_t off,int whence,int force_reconnect)1772 static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect)
1773 {
1774 HTTPContext *s = h->priv_data;
1775 URLContext *old_hd = s->hd;
1776 uint64_t old_off = s->off;
1777 uint8_t old_buf[BUFFER_SIZE];
1778 int old_buf_size, ret;
1779 AVDictionary *options = NULL;
1780
1781 if (whence == AVSEEK_SIZE)
1782 return s->filesize;
1783 else if (!force_reconnect &&
1784 ((whence == SEEK_CUR && off == 0) ||
1785 (whence == SEEK_SET && off == s->off)))
1786 return s->off;
1787 else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
1788 return AVERROR(ENOSYS);
1789
1790 if (whence == SEEK_CUR)
1791 off += s->off;
1792 else if (whence == SEEK_END)
1793 off += s->filesize;
1794 else if (whence != SEEK_SET)
1795 return AVERROR(EINVAL);
1796 if (off < 0)
1797 return AVERROR(EINVAL);
1798 s->off = off;
1799
1800 if (s->off && h->is_streamed)
1801 return AVERROR(ENOSYS);
1802
1803 /* do not try to make a new connection if seeking past the end of the file */
1804 if (s->end_off || s->filesize != UINT64_MAX) {
1805 uint64_t end_pos = s->end_off ? s->end_off : s->filesize;
1806 if (s->off >= end_pos)
1807 return s->off;
1808 }
1809
1810 /* we save the old context in case the seek fails */
1811 old_buf_size = s->buf_end - s->buf_ptr;
1812 memcpy(old_buf, s->buf_ptr, old_buf_size);
1813 s->hd = NULL;
1814
1815 /* if it fails, continue on old connection */
1816 if ((ret = http_open_cnx(h, &options)) < 0) {
1817 av_dict_free(&options);
1818 memcpy(s->buffer, old_buf, old_buf_size);
1819 s->buf_ptr = s->buffer;
1820 s->buf_end = s->buffer + old_buf_size;
1821 s->hd = old_hd;
1822 s->off = old_off;
1823 return ret;
1824 }
1825 av_dict_free(&options);
1826 ffurl_close(old_hd);
1827 return off;
1828 }
1829
http_seek(URLContext * h,int64_t off,int whence)1830 static int64_t http_seek(URLContext *h, int64_t off, int whence)
1831 {
1832 return http_seek_internal(h, off, whence, 0);
1833 }
1834
http_get_file_handle(URLContext * h)1835 static int http_get_file_handle(URLContext *h)
1836 {
1837 HTTPContext *s = h->priv_data;
1838 return ffurl_get_file_handle(s->hd);
1839 }
1840
http_get_short_seek(URLContext * h)1841 static int http_get_short_seek(URLContext *h)
1842 {
1843 HTTPContext *s = h->priv_data;
1844 return ffurl_get_short_seek(s->hd);
1845 }
1846
1847 #define HTTP_CLASS(flavor) \
1848 static const AVClass flavor ## _context_class = { \
1849 .class_name = # flavor, \
1850 .item_name = av_default_item_name, \
1851 .option = options, \
1852 .version = LIBAVUTIL_VERSION_INT, \
1853 }
1854
1855 #if CONFIG_HTTP_PROTOCOL
1856 HTTP_CLASS(http);
1857
1858 const URLProtocol ff_http_protocol = {
1859 .name = "http",
1860 .url_open2 = http_open,
1861 .url_accept = http_accept,
1862 .url_handshake = http_handshake,
1863 .url_read = http_read,
1864 .url_write = http_write,
1865 .url_seek = http_seek,
1866 .url_close = http_close,
1867 .url_get_file_handle = http_get_file_handle,
1868 .url_get_short_seek = http_get_short_seek,
1869 .url_shutdown = http_shutdown,
1870 .priv_data_size = sizeof(HTTPContext),
1871 .priv_data_class = &http_context_class,
1872 .flags = URL_PROTOCOL_FLAG_NETWORK,
1873 .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy,data"
1874 };
1875 #endif /* CONFIG_HTTP_PROTOCOL */
1876
1877 #if CONFIG_HTTPS_PROTOCOL
1878 HTTP_CLASS(https);
1879
1880 const URLProtocol ff_https_protocol = {
1881 .name = "https",
1882 .url_open2 = http_open,
1883 .url_read = http_read,
1884 .url_write = http_write,
1885 .url_seek = http_seek,
1886 .url_close = http_close,
1887 .url_get_file_handle = http_get_file_handle,
1888 .url_get_short_seek = http_get_short_seek,
1889 .url_shutdown = http_shutdown,
1890 .priv_data_size = sizeof(HTTPContext),
1891 .priv_data_class = &https_context_class,
1892 .flags = URL_PROTOCOL_FLAG_NETWORK,
1893 .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto,httpproxy"
1894 };
1895 #endif /* CONFIG_HTTPS_PROTOCOL */
1896
1897 #if CONFIG_HTTPPROXY_PROTOCOL
http_proxy_close(URLContext * h)1898 static int http_proxy_close(URLContext *h)
1899 {
1900 HTTPContext *s = h->priv_data;
1901 if (s->hd)
1902 ffurl_closep(&s->hd);
1903 return 0;
1904 }
1905
http_proxy_open(URLContext * h,const char * uri,int flags)1906 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1907 {
1908 HTTPContext *s = h->priv_data;
1909 char hostname[1024], hoststr[1024];
1910 char auth[1024], pathbuf[1024], *path;
1911 char lower_url[100];
1912 int port, ret = 0, attempts = 0;
1913 HTTPAuthType cur_auth_type;
1914 char *authstr;
1915 int new_loc;
1916
1917 if( s->seekable == 1 )
1918 h->is_streamed = 0;
1919 else
1920 h->is_streamed = 1;
1921
1922 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1923 pathbuf, sizeof(pathbuf), uri);
1924 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1925 path = pathbuf;
1926 if (*path == '/')
1927 path++;
1928
1929 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1930 NULL);
1931 redo:
1932 ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1933 &h->interrupt_callback, NULL,
1934 h->protocol_whitelist, h->protocol_blacklist, h);
1935 if (ret < 0)
1936 return ret;
1937
1938 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1939 path, "CONNECT");
1940 snprintf(s->buffer, sizeof(s->buffer),
1941 "CONNECT %s HTTP/1.1\r\n"
1942 "Host: %s\r\n"
1943 "Connection: close\r\n"
1944 "%s%s"
1945 "\r\n",
1946 path,
1947 hoststr,
1948 authstr ? "Proxy-" : "", authstr ? authstr : "");
1949 av_freep(&authstr);
1950
1951 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1952 goto fail;
1953
1954 s->buf_ptr = s->buffer;
1955 s->buf_end = s->buffer;
1956 s->line_count = 0;
1957 s->filesize = UINT64_MAX;
1958 cur_auth_type = s->proxy_auth_state.auth_type;
1959
1960 /* Note: This uses buffering, potentially reading more than the
1961 * HTTP header. If tunneling a protocol where the server starts
1962 * the conversation, we might buffer part of that here, too.
1963 * Reading that requires using the proper ffurl_read() function
1964 * on this URLContext, not using the fd directly (as the tls
1965 * protocol does). This shouldn't be an issue for tls though,
1966 * since the client starts the conversation there, so there
1967 * is no extra data that we might buffer up here.
1968 */
1969 ret = http_read_header(h, &new_loc);
1970 if (ret < 0)
1971 goto fail;
1972
1973 attempts++;
1974 if (s->http_code == 407 &&
1975 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1976 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1977 ffurl_closep(&s->hd);
1978 goto redo;
1979 }
1980
1981 if (s->http_code < 400)
1982 return 0;
1983 ret = ff_http_averror(s->http_code, AVERROR(EIO));
1984
1985 fail:
1986 http_proxy_close(h);
1987 return ret;
1988 }
1989
http_proxy_write(URLContext * h,const uint8_t * buf,int size)1990 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1991 {
1992 HTTPContext *s = h->priv_data;
1993 return ffurl_write(s->hd, buf, size);
1994 }
1995
1996 const URLProtocol ff_httpproxy_protocol = {
1997 .name = "httpproxy",
1998 .url_open = http_proxy_open,
1999 .url_read = http_buf_read,
2000 .url_write = http_proxy_write,
2001 .url_close = http_proxy_close,
2002 .url_get_file_handle = http_get_file_handle,
2003 .priv_data_size = sizeof(HTTPContext),
2004 .flags = URL_PROTOCOL_FLAG_NETWORK,
2005 };
2006 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
2007