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