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 "libavutil/avstring.h" 23#include "avformat.h" 24#include "internal.h" 25#include "network.h" 26#include "http.h" 27#include "os_support.h" 28#include "httpauth.h" 29#include "url.h" 30#include "libavutil/opt.h" 31 32#if CONFIG_ZLIB 33#include <zlib.h> 34#endif 35 36/* XXX: POST protocol is not completely implemented because ffmpeg uses 37 only a subset of it. */ 38 39/* The IO buffer size is unrelated to the max URL size in itself, but needs 40 * to be large enough to fit the full request headers (including long 41 * path names). 42 */ 43#define BUFFER_SIZE MAX_URL_SIZE 44#define MAX_REDIRECTS 8 45 46typedef struct { 47 const AVClass *class; 48 URLContext *hd; 49 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end; 50 int line_count; 51 int http_code; 52 /* Used if "Transfer-Encoding: chunked" otherwise -1. */ 53 int64_t chunksize; 54 int64_t off, end_off, filesize; 55 char *location; 56 HTTPAuthState auth_state; 57 HTTPAuthState proxy_auth_state; 58 char *headers; 59 char *mime_type; 60 char *user_agent; 61 char *content_type; 62 /* Set if the server correctly handles Connection: close and will close 63 * the connection after feeding us the content. */ 64 int willclose; 65 int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */ 66 int chunked_post; 67 /* A flag which indicates if the end of chunked encoding has been sent. */ 68 int end_chunked_post; 69 /* A flag which indicates we have finished to read POST reply. */ 70 int end_header; 71 /* A flag which indicates if we use persistent connections. */ 72 int multiple_requests; 73 uint8_t *post_data; 74 int post_datalen; 75 int is_akamai; 76 int is_mediagateway; 77 char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) 78 int icy; 79 /* how much data was read since the last ICY metadata packet */ 80 int icy_data_read; 81 /* after how many bytes of read data a new metadata packet will be found */ 82 int icy_metaint; 83 char *icy_metadata_headers; 84 char *icy_metadata_packet; 85#if CONFIG_ZLIB 86 int compressed; 87 z_stream inflate_stream; 88 uint8_t *inflate_buffer; 89#endif 90 AVDictionary *chained_options; 91 int send_expect_100; 92} HTTPContext; 93 94#define OFFSET(x) offsetof(HTTPContext, x) 95#define D AV_OPT_FLAG_DECODING_PARAM 96#define E AV_OPT_FLAG_ENCODING_PARAM 97#define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION) 98static const AVOption options[] = { 99{"seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, D }, 100{"chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E }, 101{"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, 102{"content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, 103{"user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D }, 104{"user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = DEFAULT_USER_AGENT}, 0, 0, D }, 105{"multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, 106{"post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D|E }, 107{"mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, 108{"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, {0}, 0, 0, D }, 109{"icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, 110{"icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT }, 111{"icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, {0}, 0, 0, AV_OPT_FLAG_EXPORT }, 112{"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" }, 113{"none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_NONE}, 0, 0, D|E, "auth_type" }, 114{"basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_BASIC}, 0, 0, D|E, "auth_type" }, 115{"send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E }, 116{"location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, 117{"offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D }, 118{"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 }, 119{NULL} 120}; 121#define HTTP_CLASS(flavor)\ 122static const AVClass flavor ## _context_class = {\ 123 .class_name = #flavor,\ 124 .item_name = av_default_item_name,\ 125 .option = options,\ 126 .version = LIBAVUTIL_VERSION_INT,\ 127} 128 129HTTP_CLASS(http); 130HTTP_CLASS(https); 131 132static int http_connect(URLContext *h, const char *path, const char *local_path, 133 const char *hoststr, const char *auth, 134 const char *proxyauth, int *new_location); 135 136void ff_http_init_auth_state(URLContext *dest, const URLContext *src) 137{ 138 memcpy(&((HTTPContext*)dest->priv_data)->auth_state, 139 &((HTTPContext*)src->priv_data)->auth_state, sizeof(HTTPAuthState)); 140 memcpy(&((HTTPContext*)dest->priv_data)->proxy_auth_state, 141 &((HTTPContext*)src->priv_data)->proxy_auth_state, 142 sizeof(HTTPAuthState)); 143} 144 145/* return non zero if error */ 146static int http_open_cnx(URLContext *h, AVDictionary **options) 147{ 148 const char *path, *proxy_path, *lower_proto = "tcp", *local_path; 149 char hostname[1024], hoststr[1024], proto[10]; 150 char auth[1024], proxyauth[1024] = ""; 151 char path1[MAX_URL_SIZE]; 152 char buf[1024], urlbuf[MAX_URL_SIZE]; 153 int port, use_proxy, err, location_changed = 0, redirects = 0, attempts = 0; 154 HTTPAuthType cur_auth_type, cur_proxy_auth_type; 155 HTTPContext *s = h->priv_data; 156 157 /* fill the dest addr */ 158 redo: 159 /* needed in any case to build the host string */ 160 av_url_split(proto, sizeof(proto), auth, sizeof(auth), 161 hostname, sizeof(hostname), &port, 162 path1, sizeof(path1), s->location); 163 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); 164 165 proxy_path = getenv("http_proxy"); 166 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) && 167 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL); 168 169 if (!strcmp(proto, "https")) { 170 lower_proto = "tls"; 171 use_proxy = 0; 172 if (port < 0) 173 port = 443; 174 } 175 if (port < 0) 176 port = 80; 177 178 if (path1[0] == '\0') 179 path = "/"; 180 else 181 path = path1; 182 local_path = path; 183 if (use_proxy) { 184 /* Reassemble the request URL without auth string - we don't 185 * want to leak the auth to the proxy. */ 186 ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s", 187 path1); 188 path = urlbuf; 189 av_url_split(NULL, 0, proxyauth, sizeof(proxyauth), 190 hostname, sizeof(hostname), &port, NULL, 0, proxy_path); 191 } 192 193 ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL); 194 195 if (!s->hd) { 196 err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE, 197 &h->interrupt_callback, options); 198 if (err < 0) 199 goto fail; 200 } 201 202 cur_auth_type = s->auth_state.auth_type; 203 cur_proxy_auth_type = s->auth_state.auth_type; 204 if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &location_changed) < 0) 205 goto fail; 206 attempts++; 207 if (s->http_code == 401) { 208 if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) && 209 s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { 210 ffurl_closep(&s->hd); 211 goto redo; 212 } else 213 goto fail; 214 } 215 if (s->http_code == 407) { 216 if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && 217 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { 218 ffurl_closep(&s->hd); 219 goto redo; 220 } else 221 goto fail; 222 } 223 if ((s->http_code == 301 || s->http_code == 302 || s->http_code == 303 || s->http_code == 307) 224 && location_changed == 1) { 225 /* url moved, get next */ 226 ffurl_closep(&s->hd); 227 if (redirects++ >= MAX_REDIRECTS) 228 return AVERROR(EIO); 229 /* Restart the authentication process with the new target, which 230 * might use a different auth mechanism. */ 231 memset(&s->auth_state, 0, sizeof(s->auth_state)); 232 attempts = 0; 233 location_changed = 0; 234 goto redo; 235 } 236 return 0; 237 fail: 238 if (s->hd) 239 ffurl_closep(&s->hd); 240 return AVERROR(EIO); 241} 242 243int ff_http_do_new_request(URLContext *h, const char *uri) 244{ 245 HTTPContext *s = h->priv_data; 246 AVDictionary *options = NULL; 247 int ret; 248 249 s->off = 0; 250 s->icy_data_read = 0; 251 av_free(s->location); 252 s->location = av_strdup(uri); 253 if (!s->location) 254 return AVERROR(ENOMEM); 255 256 av_dict_copy(&options, s->chained_options, 0); 257 ret = http_open_cnx(h, &options); 258 av_dict_free(&options); 259 return ret; 260} 261 262static int http_open(URLContext *h, const char *uri, int flags, 263 AVDictionary **options) 264{ 265 HTTPContext *s = h->priv_data; 266 int ret; 267 268 if( s->seekable == 1 ) 269 h->is_streamed = 0; 270 else 271 h->is_streamed = 1; 272 273 s->filesize = -1; 274 s->location = av_strdup(uri); 275 if (!s->location) 276 return AVERROR(ENOMEM); 277 if (options) 278 av_dict_copy(&s->chained_options, *options, 0); 279 280 if (s->headers) { 281 int len = strlen(s->headers); 282 if (len < 2 || strcmp("\r\n", s->headers + len - 2)) 283 av_log(h, AV_LOG_WARNING, "No trailing CRLF found in HTTP header.\n"); 284 } 285 286 ret = http_open_cnx(h, options); 287 if (ret < 0) 288 av_dict_free(&s->chained_options); 289 return ret; 290} 291static int http_getc(HTTPContext *s) 292{ 293 int len; 294 if (s->buf_ptr >= s->buf_end) { 295 len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); 296 if (len < 0) { 297 return len; 298 } else if (len == 0) { 299 return AVERROR_EOF; 300 } else { 301 s->buf_ptr = s->buffer; 302 s->buf_end = s->buffer + len; 303 } 304 } 305 return *s->buf_ptr++; 306} 307 308static int http_get_line(HTTPContext *s, char *line, int line_size) 309{ 310 int ch; 311 char *q; 312 313 q = line; 314 for(;;) { 315 ch = http_getc(s); 316 if (ch < 0) 317 return ch; 318 if (ch == '\n') { 319 /* process line */ 320 if (q > line && q[-1] == '\r') 321 q--; 322 *q = '\0'; 323 324 return 0; 325 } else { 326 if ((q - line) < line_size - 1) 327 *q++ = ch; 328 } 329 } 330} 331 332static int check_http_code(URLContext *h, int http_code, const char *end) 333{ 334 HTTPContext *s = h->priv_data; 335 /* error codes are 4xx and 5xx, but regard 401 as a success, so we 336 * don't abort until all headers have been parsed. */ 337 if (http_code >= 400 && http_code < 600 && 338 (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) && 339 (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) { 340 end += strspn(end, SPACE_CHARS); 341 av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end); 342 return AVERROR(EIO); 343 } 344 return 0; 345} 346 347static int parse_location(HTTPContext *s, const char *p) 348{ 349 char redirected_location[MAX_URL_SIZE], *new_loc; 350 ff_make_absolute_url(redirected_location, sizeof(redirected_location), 351 s->location, p); 352 new_loc = av_strdup(redirected_location); 353 if (!new_loc) 354 return AVERROR(ENOMEM); 355 av_free(s->location); 356 s->location = new_loc; 357 return 0; 358} 359 360/* "bytes $from-$to/$document_size" */ 361static void parse_content_range(URLContext *h, const char *p) 362{ 363 HTTPContext *s = h->priv_data; 364 const char *slash; 365 366 if (!strncmp(p, "bytes ", 6)) { 367 p += 6; 368 s->off = strtoll(p, NULL, 10); 369 if ((slash = strchr(p, '/')) && strlen(slash) > 0) 370 s->filesize = strtoll(slash+1, NULL, 10); 371 } 372 if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647)) 373 h->is_streamed = 0; /* we _can_ in fact seek */ 374} 375 376static int parse_content_encoding(URLContext *h, const char *p) 377{ 378 HTTPContext *s = h->priv_data; 379 380 if (!av_strncasecmp(p, "gzip", 4) || 381 !av_strncasecmp(p, "deflate", 7)) { 382#if CONFIG_ZLIB 383 s->compressed = 1; 384 inflateEnd(&s->inflate_stream); 385 if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) { 386 av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n", 387 s->inflate_stream.msg); 388 return AVERROR(ENOSYS); 389 } 390 if (zlibCompileFlags() & (1 << 17)) { 391 av_log(h, AV_LOG_WARNING, 392 "Your zlib was compiled without gzip support.\n"); 393 return AVERROR(ENOSYS); 394 } 395#else 396 av_log(h, AV_LOG_WARNING, 397 "Compressed (%s) content, need zlib with gzip support\n", p); 398 return AVERROR(ENOSYS); 399#endif 400 } else if (!av_strncasecmp(p, "identity", 8)) { 401 // The normal, no-encoding case (although servers shouldn't include 402 // the header at all if this is the case). 403 } else { 404 av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p); 405 } 406 return 0; 407} 408 409// Concat all Icy- header lines 410static int parse_icy(HTTPContext *s, const char *tag, const char *p) 411{ 412 int len = 4 + strlen(p) + strlen(tag); 413 int is_first = !s->icy_metadata_headers; 414 int ret; 415 416 if (s->icy_metadata_headers) 417 len += strlen(s->icy_metadata_headers); 418 419 if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0) 420 return ret; 421 422 if (is_first) 423 *s->icy_metadata_headers = '\0'; 424 425 av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p); 426 427 return 0; 428} 429 430static int process_line(URLContext *h, char *line, int line_count, 431 int *new_location) 432{ 433 HTTPContext *s = h->priv_data; 434 char *tag, *p, *end; 435 int ret; 436 437 /* end of header */ 438 if (line[0] == '\0') { 439 s->end_header = 1; 440 return 0; 441 } 442 443 p = line; 444 if (line_count == 0) { 445 while (!av_isspace(*p) && *p != '\0') 446 p++; 447 while (av_isspace(*p)) 448 p++; 449 s->http_code = strtol(p, &end, 10); 450 451 av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code); 452 453 if ((ret = check_http_code(h, s->http_code, end)) < 0) 454 return ret; 455 } else { 456 while (*p != '\0' && *p != ':') 457 p++; 458 if (*p != ':') 459 return 1; 460 461 *p = '\0'; 462 tag = line; 463 p++; 464 while (av_isspace(*p)) 465 p++; 466 if (!av_strcasecmp(tag, "Location")) { 467 if ((ret = parse_location(s, p)) < 0) 468 return ret; 469 *new_location = 1; 470 } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) { 471 s->filesize = strtoll(p, NULL, 10); 472 } else if (!av_strcasecmp(tag, "Content-Range")) { 473 parse_content_range(h, p); 474 } else if (!av_strcasecmp(tag, "Accept-Ranges") && 475 !strncmp(p, "bytes", 5) && 476 s->seekable == -1) { 477 h->is_streamed = 0; 478 } else if (!av_strcasecmp(tag, "Transfer-Encoding") && 479 !av_strncasecmp(p, "chunked", 7)) { 480 s->filesize = -1; 481 s->chunksize = 0; 482 } else if (!av_strcasecmp(tag, "WWW-Authenticate")) { 483 ff_http_auth_handle_header(&s->auth_state, tag, p); 484 } else if (!av_strcasecmp(tag, "Authentication-Info")) { 485 ff_http_auth_handle_header(&s->auth_state, tag, p); 486 } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) { 487 ff_http_auth_handle_header(&s->proxy_auth_state, tag, p); 488 } else if (!av_strcasecmp(tag, "Connection")) { 489 if (!strcmp(p, "close")) 490 s->willclose = 1; 491 } else if (!av_strcasecmp (tag, "Server")) { 492 if (!av_strcasecmp (p, "AkamaiGHost")) { 493 s->is_akamai = 1; 494 } else if (!av_strncasecmp (p, "MediaGateway", 12)) { 495 s->is_mediagateway = 1; 496 } 497 } else if (!av_strcasecmp (tag, "Content-Type")) { 498 av_free(s->mime_type); 499 s->mime_type = av_strdup(p); 500 } else if (!av_strcasecmp (tag, "Set-Cookie")) { 501 if (!s->cookies) { 502 if (!(s->cookies = av_strdup(p))) 503 return AVERROR(ENOMEM); 504 } else { 505 char *tmp = s->cookies; 506 size_t str_size = strlen(tmp) + strlen(p) + 2; 507 if (!(s->cookies = av_malloc(str_size))) { 508 s->cookies = tmp; 509 return AVERROR(ENOMEM); 510 } 511 snprintf(s->cookies, str_size, "%s\n%s", tmp, p); 512 av_free(tmp); 513 } 514 } else if (!av_strcasecmp (tag, "Icy-MetaInt")) { 515 s->icy_metaint = strtoll(p, NULL, 10); 516 } else if (!av_strncasecmp(tag, "Icy-", 4)) { 517 if ((ret = parse_icy(s, tag, p)) < 0) 518 return ret; 519 } else if (!av_strcasecmp(tag, "Content-Encoding")) { 520 if ((ret = parse_content_encoding(h, p)) < 0) 521 return ret; 522 } 523 } 524 return 1; 525} 526 527/** 528 * Create a string containing cookie values for use as a HTTP cookie header 529 * field value for a particular path and domain from the cookie values stored in 530 * the HTTP protocol context. The cookie string is stored in *cookies. 531 * 532 * @return a negative value if an error condition occurred, 0 otherwise 533 */ 534static int get_cookies(HTTPContext *s, char **cookies, const char *path, 535 const char *domain) 536{ 537 // cookie strings will look like Set-Cookie header field values. Multiple 538 // Set-Cookie fields will result in multiple values delimited by a newline 539 int ret = 0; 540 char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies; 541 542 if (!set_cookies) return AVERROR(EINVAL); 543 544 *cookies = NULL; 545 while ((cookie = av_strtok(set_cookies, "\n", &next))) { 546 int domain_offset = 0; 547 char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL; 548 set_cookies = NULL; 549 550 while ((param = av_strtok(cookie, "; ", &next_param))) { 551 cookie = NULL; 552 if (!av_strncasecmp("path=", param, 5)) { 553 av_free(cpath); 554 cpath = av_strdup(¶m[5]); 555 } else if (!av_strncasecmp("domain=", param, 7)) { 556 // if the cookie specifies a sub-domain, skip the leading dot thereby 557 // supporting URLs that point to sub-domains and the master domain 558 int leading_dot = (param[7] == '.'); 559 av_free(cdomain); 560 cdomain = av_strdup(¶m[7+leading_dot]); 561 } else if (!av_strncasecmp("secure", param, 6) || 562 !av_strncasecmp("comment", param, 7) || 563 !av_strncasecmp("max-age", param, 7) || 564 !av_strncasecmp("version", param, 7)) { 565 // ignore Comment, Max-Age, Secure and Version 566 } else { 567 av_free(cvalue); 568 cvalue = av_strdup(param); 569 } 570 } 571 if (!cdomain) 572 cdomain = av_strdup(domain); 573 574 // ensure all of the necessary values are valid 575 if (!cdomain || !cpath || !cvalue) { 576 av_log(s, AV_LOG_WARNING, 577 "Invalid cookie found, no value, path or domain specified\n"); 578 goto done_cookie; 579 } 580 581 // check if the request path matches the cookie path 582 if (av_strncasecmp(path, cpath, strlen(cpath))) 583 goto done_cookie; 584 585 // the domain should be at least the size of our cookie domain 586 domain_offset = strlen(domain) - strlen(cdomain); 587 if (domain_offset < 0) 588 goto done_cookie; 589 590 // match the cookie domain 591 if (av_strcasecmp(&domain[domain_offset], cdomain)) 592 goto done_cookie; 593 594 // cookie parameters match, so copy the value 595 if (!*cookies) { 596 if (!(*cookies = av_strdup(cvalue))) { 597 ret = AVERROR(ENOMEM); 598 goto done_cookie; 599 } 600 } else { 601 char *tmp = *cookies; 602 size_t str_size = strlen(cvalue) + strlen(*cookies) + 3; 603 if (!(*cookies = av_malloc(str_size))) { 604 ret = AVERROR(ENOMEM); 605 goto done_cookie; 606 } 607 snprintf(*cookies, str_size, "%s; %s", tmp, cvalue); 608 av_free(tmp); 609 } 610 611 done_cookie: 612 av_free(cdomain); 613 av_free(cpath); 614 av_free(cvalue); 615 if (ret < 0) { 616 if (*cookies) av_freep(cookies); 617 av_free(cset_cookies); 618 return ret; 619 } 620 } 621 622 av_free(cset_cookies); 623 624 return 0; 625} 626 627static inline int has_header(const char *str, const char *header) 628{ 629 /* header + 2 to skip over CRLF prefix. (make sure you have one!) */ 630 if (!str) 631 return 0; 632 return av_stristart(str, header + 2, NULL) || av_stristr(str, header); 633} 634 635static int http_read_header(URLContext *h, int *new_location) 636{ 637 HTTPContext *s = h->priv_data; 638 char line[MAX_URL_SIZE]; 639 int err = 0; 640 641 s->chunksize = -1; 642 643 for (;;) { 644 if ((err = http_get_line(s, line, sizeof(line))) < 0) 645 return err; 646 647 av_log(h, AV_LOG_DEBUG, "header='%s'\n", line); 648 649 err = process_line(h, line, s->line_count, new_location); 650 if (err < 0) 651 return err; 652 if (err == 0) 653 break; 654 s->line_count++; 655 } 656 657 if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000) 658 h->is_streamed = 1; /* we can in fact _not_ seek */ 659 660 return err; 661} 662 663static int http_connect(URLContext *h, const char *path, const char *local_path, 664 const char *hoststr, const char *auth, 665 const char *proxyauth, int *new_location) 666{ 667 HTTPContext *s = h->priv_data; 668 int post, err; 669 char headers[4096] = ""; 670 char *authstr = NULL, *proxyauthstr = NULL; 671 int64_t off = s->off; 672 int len = 0; 673 const char *method; 674 int send_expect_100 = 0; 675 676 677 /* send http header */ 678 post = h->flags & AVIO_FLAG_WRITE; 679 680 if (s->post_data) { 681 /* force POST method and disable chunked encoding when 682 * custom HTTP post data is set */ 683 post = 1; 684 s->chunked_post = 0; 685 } 686 687 method = post ? "POST" : "GET"; 688 authstr = ff_http_auth_create_response(&s->auth_state, auth, local_path, 689 method); 690 proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth, 691 local_path, method); 692 if (post && !s->post_data) { 693 send_expect_100 = s->send_expect_100; 694 /* The user has supplied authentication but we don't know the auth type, 695 * send Expect: 100-continue to get the 401 response including the 696 * WWW-Authenticate header, or an 100 continue if no auth actually 697 * is needed. */ 698 if (auth && *auth && 699 s->auth_state.auth_type == HTTP_AUTH_NONE && 700 s->http_code != 401) 701 send_expect_100 = 1; 702 } 703 704 /* set default headers if needed */ 705 if (!has_header(s->headers, "\r\nUser-Agent: ")) 706 len += av_strlcatf(headers + len, sizeof(headers) - len, 707 "User-Agent: %s\r\n", s->user_agent); 708 if (!has_header(s->headers, "\r\nAccept: ")) 709 len += av_strlcpy(headers + len, "Accept: */*\r\n", 710 sizeof(headers) - len); 711 // Note: we send this on purpose even when s->off is 0 when we're probing, 712 // since it allows us to detect more reliably if a (non-conforming) 713 // server supports seeking by analysing the reply headers. 714 if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) { 715 len += av_strlcatf(headers + len, sizeof(headers) - len, 716 "Range: bytes=%"PRId64"-", s->off); 717 if (s->end_off) 718 len += av_strlcatf(headers + len, sizeof(headers) - len, 719 "%"PRId64, s->end_off - 1); 720 len += av_strlcpy(headers + len, "\r\n", 721 sizeof(headers) - len); 722 } 723 if (send_expect_100 && !has_header(s->headers, "\r\nExpect: ")) 724 len += av_strlcatf(headers + len, sizeof(headers) - len, 725 "Expect: 100-continue\r\n"); 726 727 if (!has_header(s->headers, "\r\nConnection: ")) { 728 if (s->multiple_requests) { 729 len += av_strlcpy(headers + len, "Connection: keep-alive\r\n", 730 sizeof(headers) - len); 731 } else { 732 len += av_strlcpy(headers + len, "Connection: close\r\n", 733 sizeof(headers) - len); 734 } 735 } 736 737 if (!has_header(s->headers, "\r\nHost: ")) 738 len += av_strlcatf(headers + len, sizeof(headers) - len, 739 "Host: %s\r\n", hoststr); 740 if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data) 741 len += av_strlcatf(headers + len, sizeof(headers) - len, 742 "Content-Length: %d\r\n", s->post_datalen); 743 744 if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type) 745 len += av_strlcatf(headers + len, sizeof(headers) - len, 746 "Content-Type: %s\r\n", s->content_type); 747 if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) { 748 char *cookies = NULL; 749 if (!get_cookies(s, &cookies, path, hoststr) && cookies) { 750 len += av_strlcatf(headers + len, sizeof(headers) - len, 751 "Cookie: %s\r\n", cookies); 752 av_free(cookies); 753 } 754 } 755 if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy) { 756 len += av_strlcatf(headers + len, sizeof(headers) - len, 757 "Icy-MetaData: %d\r\n", 1); 758 } 759 760 /* now add in custom headers */ 761 if (s->headers) 762 av_strlcpy(headers + len, s->headers, sizeof(headers) - len); 763 764 snprintf(s->buffer, sizeof(s->buffer), 765 "%s %s HTTP/1.1\r\n" 766 "%s" 767 "%s" 768 "%s" 769 "%s%s" 770 "\r\n", 771 method, 772 path, 773 post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "", 774 headers, 775 authstr ? authstr : "", 776 proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : ""); 777 778 av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer); 779 780 if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) 781 goto done; 782 783 if (s->post_data) 784 if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0) 785 goto done; 786 787 /* init input buffer */ 788 s->buf_ptr = s->buffer; 789 s->buf_end = s->buffer; 790 s->line_count = 0; 791 s->off = 0; 792 s->icy_data_read = 0; 793 s->filesize = -1; 794 s->willclose = 0; 795 s->end_chunked_post = 0; 796 s->end_header = 0; 797 if (post && !s->post_data && !send_expect_100) { 798 /* Pretend that it did work. We didn't read any header yet, since 799 * we've still to send the POST data, but the code calling this 800 * function will check http_code after we return. */ 801 s->http_code = 200; 802 err = 0; 803 goto done; 804 } 805 806 /* wait for header */ 807 err = http_read_header(h, new_location); 808 if (err < 0) 809 goto done; 810 811 err = (off == s->off) ? 0 : -1; 812done: 813 av_freep(&authstr); 814 av_freep(&proxyauthstr); 815 return err; 816} 817 818 819static int http_buf_read(URLContext *h, uint8_t *buf, int size) 820{ 821 HTTPContext *s = h->priv_data; 822 int len; 823 /* read bytes from input buffer first */ 824 len = s->buf_end - s->buf_ptr; 825 if (len > 0) { 826 if (len > size) 827 len = size; 828 memcpy(buf, s->buf_ptr, len); 829 s->buf_ptr += len; 830 } else { 831 if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize) 832 return AVERROR_EOF; 833 len = ffurl_read(s->hd, buf, size); 834 } 835 if (len > 0) { 836 s->off += len; 837 if (s->chunksize > 0) 838 s->chunksize -= len; 839 } 840 return len; 841} 842 843#if CONFIG_ZLIB 844#define DECOMPRESS_BUF_SIZE (256 * 1024) 845static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size) 846{ 847 HTTPContext *s = h->priv_data; 848 int ret; 849 850 if (!s->inflate_buffer) { 851 s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE); 852 if (!s->inflate_buffer) 853 return AVERROR(ENOMEM); 854 } 855 856 if (s->inflate_stream.avail_in == 0) { 857 int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE); 858 if (read <= 0) 859 return read; 860 s->inflate_stream.next_in = s->inflate_buffer; 861 s->inflate_stream.avail_in = read; 862 } 863 864 s->inflate_stream.avail_out = size; 865 s->inflate_stream.next_out = buf; 866 867 ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH); 868 if (ret != Z_OK && ret != Z_STREAM_END) 869 av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", ret, s->inflate_stream.msg); 870 871 return size - s->inflate_stream.avail_out; 872} 873#endif 874 875static int http_read_stream(URLContext *h, uint8_t *buf, int size) 876{ 877 HTTPContext *s = h->priv_data; 878 int err, new_location; 879 880 if (!s->hd) 881 return AVERROR_EOF; 882 883 if (s->end_chunked_post && !s->end_header) { 884 err = http_read_header(h, &new_location); 885 if (err < 0) 886 return err; 887 } 888 889 if (s->chunksize >= 0) { 890 if (!s->chunksize) { 891 char line[32]; 892 893 do { 894 if ((err = http_get_line(s, line, sizeof(line))) < 0) 895 return err; 896 } while (!*line); /* skip CR LF from last chunk */ 897 898 s->chunksize = strtoll(line, NULL, 16); 899 900 av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize); 901 902 if (!s->chunksize) 903 return 0; 904 } 905 size = FFMIN(size, s->chunksize); 906 } 907#if CONFIG_ZLIB 908 if (s->compressed) 909 return http_buf_read_compressed(h, buf, size); 910#endif 911 return http_buf_read(h, buf, size); 912} 913 914// Like http_read_stream(), but no short reads. 915// Assumes partial reads are an error. 916static int http_read_stream_all(URLContext *h, uint8_t *buf, int size) 917{ 918 int pos = 0; 919 while (pos < size) { 920 int len = http_read_stream(h, buf + pos, size - pos); 921 if (len < 0) 922 return len; 923 pos += len; 924 } 925 return pos; 926} 927 928static int store_icy(URLContext *h, int size) 929{ 930 HTTPContext *s = h->priv_data; 931 /* until next metadata packet */ 932 int remaining = s->icy_metaint - s->icy_data_read; 933 934 if (remaining < 0) 935 return AVERROR_INVALIDDATA; 936 937 if (!remaining) { 938 // The metadata packet is variable sized. It has a 1 byte header 939 // which sets the length of the packet (divided by 16). If it's 0, 940 // the metadata doesn't change. After the packet, icy_metaint bytes 941 // of normal data follow. 942 uint8_t ch; 943 int len = http_read_stream_all(h, &ch, 1); 944 if (len < 0) 945 return len; 946 if (ch > 0) { 947 char data[255 * 16 + 1]; 948 int ret; 949 len = ch * 16; 950 ret = http_read_stream_all(h, data, len); 951 if (ret < 0) 952 return ret; 953 data[len + 1] = 0; 954 if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0) 955 return ret; 956 } 957 s->icy_data_read = 0; 958 remaining = s->icy_metaint; 959 } 960 961 return FFMIN(size, remaining); 962} 963 964static int http_read(URLContext *h, uint8_t *buf, int size) 965{ 966 HTTPContext *s = h->priv_data; 967 968 if (s->icy_metaint > 0) { 969 size = store_icy(h, size); 970 if (size < 0) 971 return size; 972 } 973 974 size = http_read_stream(h, buf, size); 975 if (size > 0) 976 s->icy_data_read += size; 977 return size; 978} 979 980/* used only when posting data */ 981static int http_write(URLContext *h, const uint8_t *buf, int size) 982{ 983 char temp[11] = ""; /* 32-bit hex + CRLF + nul */ 984 int ret; 985 char crlf[] = "\r\n"; 986 HTTPContext *s = h->priv_data; 987 988 if (!s->chunked_post) { 989 /* non-chunked data is sent without any special encoding */ 990 return ffurl_write(s->hd, buf, size); 991 } 992 993 /* silently ignore zero-size data since chunk encoding that would 994 * signal EOF */ 995 if (size > 0) { 996 /* upload data using chunked encoding */ 997 snprintf(temp, sizeof(temp), "%x\r\n", size); 998 999 if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 || 1000 (ret = ffurl_write(s->hd, buf, size)) < 0 || 1001 (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0) 1002 return ret; 1003 } 1004 return size; 1005} 1006 1007static int http_shutdown(URLContext *h, int flags) 1008{ 1009 int ret = 0; 1010 char footer[] = "0\r\n\r\n"; 1011 HTTPContext *s = h->priv_data; 1012 1013 /* signal end of chunked encoding if used */ 1014 if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) { 1015 ret = ffurl_write(s->hd, footer, sizeof(footer) - 1); 1016 ret = ret > 0 ? 0 : ret; 1017 s->end_chunked_post = 1; 1018 } 1019 1020 return ret; 1021} 1022 1023static int http_close(URLContext *h) 1024{ 1025 int ret = 0; 1026 HTTPContext *s = h->priv_data; 1027 1028#if CONFIG_ZLIB 1029 inflateEnd(&s->inflate_stream); 1030 av_freep(&s->inflate_buffer); 1031#endif 1032 1033 if (!s->end_chunked_post) { 1034 /* Close the write direction by sending the end of chunked encoding. */ 1035 ret = http_shutdown(h, h->flags); 1036 } 1037 1038 if (s->hd) 1039 ffurl_closep(&s->hd); 1040 av_dict_free(&s->chained_options); 1041 return ret; 1042} 1043 1044static int64_t http_seek(URLContext *h, int64_t off, int whence) 1045{ 1046 HTTPContext *s = h->priv_data; 1047 URLContext *old_hd = s->hd; 1048 int64_t old_off = s->off; 1049 uint8_t old_buf[BUFFER_SIZE]; 1050 int old_buf_size, ret; 1051 AVDictionary *options = NULL; 1052 1053 if (whence == AVSEEK_SIZE) 1054 return s->filesize; 1055 else if ((whence == SEEK_CUR && off == 0) || 1056 (whence == SEEK_SET && off == s->off)) 1057 return s->off; 1058 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed) 1059 return AVERROR(ENOSYS); 1060 1061 if (whence == SEEK_CUR) 1062 off += s->off; 1063 else if (whence == SEEK_END) 1064 off += s->filesize; 1065 else if (whence != SEEK_SET) 1066 return AVERROR(EINVAL); 1067 if (off < 0) 1068 return AVERROR(EINVAL); 1069 s->off = off; 1070 1071 /* we save the old context in case the seek fails */ 1072 old_buf_size = s->buf_end - s->buf_ptr; 1073 memcpy(old_buf, s->buf_ptr, old_buf_size); 1074 s->hd = NULL; 1075 1076 /* if it fails, continue on old connection */ 1077 av_dict_copy(&options, s->chained_options, 0); 1078 if ((ret = http_open_cnx(h, &options)) < 0) { 1079 av_dict_free(&options); 1080 memcpy(s->buffer, old_buf, old_buf_size); 1081 s->buf_ptr = s->buffer; 1082 s->buf_end = s->buffer + old_buf_size; 1083 s->hd = old_hd; 1084 s->off = old_off; 1085 return ret; 1086 } 1087 av_dict_free(&options); 1088 ffurl_close(old_hd); 1089 return off; 1090} 1091 1092static int 1093http_get_file_handle(URLContext *h) 1094{ 1095 HTTPContext *s = h->priv_data; 1096 return ffurl_get_file_handle(s->hd); 1097} 1098 1099#if CONFIG_HTTP_PROTOCOL 1100URLProtocol ff_http_protocol = { 1101 .name = "http", 1102 .url_open2 = http_open, 1103 .url_read = http_read, 1104 .url_write = http_write, 1105 .url_seek = http_seek, 1106 .url_close = http_close, 1107 .url_get_file_handle = http_get_file_handle, 1108 .url_shutdown = http_shutdown, 1109 .priv_data_size = sizeof(HTTPContext), 1110 .priv_data_class = &http_context_class, 1111 .flags = URL_PROTOCOL_FLAG_NETWORK, 1112}; 1113#endif 1114#if CONFIG_HTTPS_PROTOCOL 1115URLProtocol ff_https_protocol = { 1116 .name = "https", 1117 .url_open2 = http_open, 1118 .url_read = http_read, 1119 .url_write = http_write, 1120 .url_seek = http_seek, 1121 .url_close = http_close, 1122 .url_get_file_handle = http_get_file_handle, 1123 .url_shutdown = http_shutdown, 1124 .priv_data_size = sizeof(HTTPContext), 1125 .priv_data_class = &https_context_class, 1126 .flags = URL_PROTOCOL_FLAG_NETWORK, 1127}; 1128#endif 1129 1130#if CONFIG_HTTPPROXY_PROTOCOL 1131static int http_proxy_close(URLContext *h) 1132{ 1133 HTTPContext *s = h->priv_data; 1134 if (s->hd) 1135 ffurl_closep(&s->hd); 1136 return 0; 1137} 1138 1139static int http_proxy_open(URLContext *h, const char *uri, int flags) 1140{ 1141 HTTPContext *s = h->priv_data; 1142 char hostname[1024], hoststr[1024]; 1143 char auth[1024], pathbuf[1024], *path; 1144 char lower_url[100]; 1145 int port, ret = 0, attempts = 0; 1146 HTTPAuthType cur_auth_type; 1147 char *authstr; 1148 int new_loc; 1149 1150 if( s->seekable == 1 ) 1151 h->is_streamed = 0; 1152 else 1153 h->is_streamed = 1; 1154 1155 av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, 1156 pathbuf, sizeof(pathbuf), uri); 1157 ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); 1158 path = pathbuf; 1159 if (*path == '/') 1160 path++; 1161 1162 ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port, 1163 NULL); 1164redo: 1165 ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, 1166 &h->interrupt_callback, NULL); 1167 if (ret < 0) 1168 return ret; 1169 1170 authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth, 1171 path, "CONNECT"); 1172 snprintf(s->buffer, sizeof(s->buffer), 1173 "CONNECT %s HTTP/1.1\r\n" 1174 "Host: %s\r\n" 1175 "Connection: close\r\n" 1176 "%s%s" 1177 "\r\n", 1178 path, 1179 hoststr, 1180 authstr ? "Proxy-" : "", authstr ? authstr : ""); 1181 av_freep(&authstr); 1182 1183 if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) 1184 goto fail; 1185 1186 s->buf_ptr = s->buffer; 1187 s->buf_end = s->buffer; 1188 s->line_count = 0; 1189 s->filesize = -1; 1190 cur_auth_type = s->proxy_auth_state.auth_type; 1191 1192 /* Note: This uses buffering, potentially reading more than the 1193 * HTTP header. If tunneling a protocol where the server starts 1194 * the conversation, we might buffer part of that here, too. 1195 * Reading that requires using the proper ffurl_read() function 1196 * on this URLContext, not using the fd directly (as the tls 1197 * protocol does). This shouldn't be an issue for tls though, 1198 * since the client starts the conversation there, so there 1199 * is no extra data that we might buffer up here. 1200 */ 1201 ret = http_read_header(h, &new_loc); 1202 if (ret < 0) 1203 goto fail; 1204 1205 attempts++; 1206 if (s->http_code == 407 && 1207 (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && 1208 s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) { 1209 ffurl_closep(&s->hd); 1210 goto redo; 1211 } 1212 1213 if (s->http_code < 400) 1214 return 0; 1215 ret = AVERROR(EIO); 1216 1217fail: 1218 http_proxy_close(h); 1219 return ret; 1220} 1221 1222static int http_proxy_write(URLContext *h, const uint8_t *buf, int size) 1223{ 1224 HTTPContext *s = h->priv_data; 1225 return ffurl_write(s->hd, buf, size); 1226} 1227 1228URLProtocol ff_httpproxy_protocol = { 1229 .name = "httpproxy", 1230 .url_open = http_proxy_open, 1231 .url_read = http_buf_read, 1232 .url_write = http_proxy_write, 1233 .url_close = http_proxy_close, 1234 .url_get_file_handle = http_get_file_handle, 1235 .priv_data_size = sizeof(HTTPContext), 1236 .flags = URL_PROTOCOL_FLAG_NETWORK, 1237}; 1238#endif 1239