| 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/avstring.h" |
| 29 | #include "libavutil/opt.h" |
| 30 | |
| 31 | #include "avformat.h" |
| 32 | #include "http.h" |
| 33 | #include "httpauth.h" |
| 34 | #include "internal.h" |
| 35 | #include "network.h" |
| 36 | #include "os_support.h" |
| 37 | #include "url.h" |
| 38 | |
| 39 | /* XXX: POST protocol is not completely implemented because ffmpeg uses |
| 40 | * only a subset of it. */ |
| 41 | |
| 42 | /* The IO buffer size is unrelated to the max URL size in itself, but needs |
| 43 | * to be large enough to fit the full request headers (including long |
| 44 | * path names). */ |
| 45 | #define BUFFER_SIZE MAX_URL_SIZE |
| 46 | #define MAX_REDIRECTS 8 |
| 47 | |
| 48 | typedef struct { |
| 49 | const AVClass *class; |
| 50 | URLContext *hd; |
| 51 | unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end; |
| 52 | int line_count; |
| 53 | int http_code; |
| 54 | /* Used if "Transfer-Encoding: chunked" otherwise -1. */ |
| 55 | int64_t chunksize; |
| 56 | int64_t off, end_off, filesize; |
| 57 | char *location; |
| 58 | HTTPAuthState auth_state; |
| 59 | HTTPAuthState proxy_auth_state; |
| 60 | char *headers; |
| 61 | char *mime_type; |
| 62 | char *user_agent; |
| 63 | char *content_type; |
| 64 | /* Set if the server correctly handles Connection: close and will close |
| 65 | * the connection after feeding us the content. */ |
| 66 | int willclose; |
| 67 | int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */ |
| 68 | int chunked_post; |
| 69 | /* A flag which indicates if the end of chunked encoding has been sent. */ |
| 70 | int end_chunked_post; |
| 71 | /* A flag which indicates we have finished to read POST reply. */ |
| 72 | int end_header; |
| 73 | /* A flag which indicates if we use persistent connections. */ |
| 74 | int multiple_requests; |
| 75 | uint8_t *post_data; |
| 76 | int post_datalen; |
| 77 | int is_akamai; |
| 78 | int is_mediagateway; |
| 79 | char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) |
| 80 | int icy; |
| 81 | /* how much data was read since the last ICY metadata packet */ |
| 82 | int icy_data_read; |
| 83 | /* after how many bytes of read data a new metadata packet will be found */ |
| 84 | int icy_metaint; |
| 85 | char *icy_metadata_headers; |
| 86 | char *icy_metadata_packet; |
| 87 | AVDictionary *metadata; |
| 88 | #if CONFIG_ZLIB |
| 89 | int compressed; |
| 90 | z_stream inflate_stream; |
| 91 | uint8_t *inflate_buffer; |
| 92 | #endif /* CONFIG_ZLIB */ |
| 93 | AVDictionary *chained_options; |
| 94 | int send_expect_100; |
| 95 | char *method; |
| 96 | } HTTPContext; |
| 97 | |
| 98 | #define OFFSET(x) offsetof(HTTPContext, x) |
| 99 | #define D AV_OPT_FLAG_DECODING_PARAM |
| 100 | #define E AV_OPT_FLAG_ENCODING_PARAM |
| 101 | #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION) |
| 102 | |
| 103 | static const AVOption options[] = { |
| 104 | { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D }, |
| 105 | { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E }, |
| 106 | { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E }, |
| 107 | { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E }, |
| 108 | { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D }, |
| 109 | { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D }, |
| 110 | { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E }, |
| 111 | { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E }, |
| 112 | { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, |
| 113 | { "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 }, |
| 114 | { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D }, |
| 115 | { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT }, |
| 116 | { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT }, |
| 117 | { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT }, |
| 118 | { "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"}, |
| 119 | { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"}, |
| 120 | { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"}, |
| 121 | { "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 }, |
| 122 | { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E }, |
| 123 | { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D }, |
| 124 | { "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 }, |
| 125 | { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, |
| 126 | { NULL } |
| 127 | }; |
| 128 | |
| 129 | static int http_connect(URLContext *h, const char *path, const char *local_path, |
| 130 | const char *hoststr, const char *auth, |
| 131 | const char *proxyauth, int *new_location); |
| 132 | |
| 133 | void ff_http_init_auth_state(URLContext *dest, const URLContext *src) |
| 134 | { |
| 135 | memcpy(&((HTTPContext *)dest->priv_data)->auth_state, |
| 136 | &((HTTPContext *)src->priv_data)->auth_state, |
| 137 | sizeof(HTTPAuthState)); |
| 138 | memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state, |
| 139 | &((HTTPContext *)src->priv_data)->proxy_auth_state, |
| 140 | sizeof(HTTPAuthState)); |
| 141 | } |
| 142 | |
| 143 | static int http_open_cnx_internal(URLContext *h, AVDictionary **options) |
| 144 | { |
| 145 | const char *path, *proxy_path, *lower_proto = "tcp", *local_path; |
| 146 | char hostname[1024], hoststr[1024], proto[10]; |
| 147 | char auth[1024], proxyauth[1024] = ""; |
| 148 | char path1[MAX_URL_SIZE]; |
| 149 | char buf[1024], urlbuf[MAX_URL_SIZE]; |
| 150 | int port, use_proxy, err, location_changed = 0; |
| 151 | HTTPContext *s = h->priv_data; |
| 152 | |
| 153 | av_url_split(proto, sizeof(proto), auth, sizeof(auth), |
| 154 | hostname, sizeof(hostname), &port, |
| 155 | path1, sizeof(path1), s->location); |
| 156 | ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); |
| 157 | |
| 158 | proxy_path = getenv("http_proxy"); |
| 159 | use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) && |
| 160 | proxy_path && av_strstart(proxy_path, "http://", NULL); |
| 161 | |
| 162 | if (!strcmp(proto, "https")) { |
| 163 | lower_proto = "tls"; |
| 164 | use_proxy = 0; |
| 165 | if (port < 0) |
| 166 | port = 443; |
| 167 | } |
| 168 | if (port < 0) |
| 169 | port = 80; |
| 170 | |
| 171 | if (path1[0] == '\0') |
| 172 | path = "/"; |
| 173 | else |
| 174 | path = path1; |
| 175 | local_path = path; |
| 176 | if (use_proxy) { |
| 177 | /* Reassemble the request URL without auth string - we don't |
| 178 | * want to leak the auth to the proxy. */ |
| 179 | ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s", |
| 180 | path1); |
| 181 | path = urlbuf; |
| 182 | av_url_split(NULL, 0, proxyauth, sizeof(proxyauth), |
| 183 | hostname, sizeof(hostname), &port, NULL, 0, proxy_path); |
| 184 | } |
| 185 | |
| 186 | ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL); |
| 187 | |
| 188 | if (!s->hd) { |
| 189 | err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE, |
| 190 | &h->interrupt_callback, options); |
| 191 | if (err < 0) |
| 192 | return err; |
| 193 | } |
| 194 | |
| 195 | err = http_connect(h, path, local_path, hoststr, |
| 196 | auth, proxyauth, &location_changed); |
| 197 | if (err < 0) |
| 198 | return err; |
| 199 | |
| 200 | return location_changed; |
| 201 | } |
| 202 | |
| 203 | /* return non zero if error */ |
| 204 | static int http_open_cnx(URLContext *h, AVDictionary **options) |
| 205 | { |
| 206 | HTTPAuthType cur_auth_type, cur_proxy_auth_type; |
| 207 | HTTPContext *s = h->priv_data; |
| 208 | int location_changed, attempts = 0, redirects = 0; |
| 209 | redo: |
| 210 | cur_auth_type = s->auth_state.auth_type; |
| 211 | cur_proxy_auth_type = s->auth_state.auth_type; |
| 212 | |
| 213 | location_changed = http_open_cnx_internal(h, options); |
| 214 | if (location_changed < 0) |
| 215 | goto fail; |
| 216 | |
| 217 | attempts++; |
| 218 | if (s->http_code == 401) { |
| 219 | if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) && |
| 220 | s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { |
| 221 | ffurl_closep(&s->hd); |
| 222 | goto redo; |
| 223 | } else |
| 224 | goto fail; |
| 225 | } |
| 226 | if (s->http_code == 407) { |
| 227 | if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && |
| 228 | s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { |
| 229 | ffurl_closep(&s->hd); |
| 230 | goto redo; |
| 231 | } else |
| 232 | goto fail; |
| 233 | } |
| 234 | if ((s->http_code == 301 || s->http_code == 302 || |
| 235 | s->http_code == 303 || s->http_code == 307) && |
| 236 | location_changed == 1) { |
| 237 | /* url moved, get next */ |
| 238 | ffurl_closep(&s->hd); |
| 239 | if (redirects++ >= MAX_REDIRECTS) |
| 240 | return AVERROR(EIO); |
| 241 | /* Restart the authentication process with the new target, which |
| 242 | * might use a different auth mechanism. */ |
| 243 | memset(&s->auth_state, 0, sizeof(s->auth_state)); |
| 244 | attempts = 0; |
| 245 | location_changed = 0; |
| 246 | goto redo; |
| 247 | } |
| 248 | return 0; |
| 249 | |
| 250 | fail: |
| 251 | if (s->hd) |
| 252 | ffurl_closep(&s->hd); |
| 253 | return AVERROR(EIO); |
| 254 | } |
| 255 | |
| 256 | int ff_http_do_new_request(URLContext *h, const char *uri) |
| 257 | { |
| 258 | HTTPContext *s = h->priv_data; |
| 259 | AVDictionary *options = NULL; |
| 260 | int ret; |
| 261 | |
| 262 | s->off = 0; |
| 263 | s->icy_data_read = 0; |
| 264 | av_free(s->location); |
| 265 | s->location = av_strdup(uri); |
| 266 | if (!s->location) |
| 267 | return AVERROR(ENOMEM); |
| 268 | |
| 269 | av_dict_copy(&options, s->chained_options, 0); |
| 270 | ret = http_open_cnx(h, &options); |
| 271 | av_dict_free(&options); |
| 272 | return ret; |
| 273 | } |
| 274 | |
| 275 | static int http_open(URLContext *h, const char *uri, int flags, |
| 276 | AVDictionary **options) |
| 277 | { |
| 278 | HTTPContext *s = h->priv_data; |
| 279 | int ret; |
| 280 | |
| 281 | if( s->seekable == 1 ) |
| 282 | h->is_streamed = 0; |
| 283 | else |
| 284 | h->is_streamed = 1; |
| 285 | |
| 286 | s->filesize = -1; |
| 287 | s->location = av_strdup(uri); |
| 288 | if (!s->location) |
| 289 | return AVERROR(ENOMEM); |
| 290 | if (options) |
| 291 | av_dict_copy(&s->chained_options, *options, 0); |
| 292 | |
| 293 | if (s->headers) { |
| 294 | int len = strlen(s->headers); |
| 295 | if (len < 2 || strcmp("\r\n", s->headers + len - 2)) |
| 296 | av_log(h, AV_LOG_WARNING, |
| 297 | "No trailing CRLF found in HTTP header.\n"); |
| 298 | } |
| 299 | |
| 300 | ret = http_open_cnx(h, options); |
| 301 | if (ret < 0) |
| 302 | av_dict_free(&s->chained_options); |
| 303 | return ret; |
| 304 | } |
| 305 | |
| 306 | static int http_getc(HTTPContext *s) |
| 307 | { |
| 308 | int len; |
| 309 | if (s->buf_ptr >= s->buf_end) { |
| 310 | len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); |
| 311 | if (len < 0) { |
| 312 | return len; |
| 313 | } else if (len == 0) { |
| 314 | return AVERROR_EOF; |
| 315 | } else { |
| 316 | s->buf_ptr = s->buffer; |
| 317 | s->buf_end = s->buffer + len; |
| 318 | } |
| 319 | } |
| 320 | return *s->buf_ptr++; |
| 321 | } |
| 322 | |
| 323 | static int http_get_line(HTTPContext *s, char *line, int line_size) |
| 324 | { |
| 325 | int ch; |
| 326 | char *q; |
| 327 | |
| 328 | q = line; |
| 329 | for (;;) { |
| 330 | ch = http_getc(s); |
| 331 | if (ch < 0) |
| 332 | return ch; |
| 333 | if (ch == '\n') { |
| 334 | /* process line */ |
| 335 | if (q > line && q[-1] == '\r') |
| 336 | q--; |
| 337 | *q = '\0'; |
| 338 | |
| 339 | return 0; |
| 340 | } else { |
| 341 | if ((q - line) < line_size - 1) |
| 342 | *q++ = ch; |
| 343 | } |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | static int check_http_code(URLContext *h, int http_code, const char *end) |
| 348 | { |
| 349 | HTTPContext *s = h->priv_data; |
| 350 | /* error codes are 4xx and 5xx, but regard 401 as a success, so we |
| 351 | * don't abort until all headers have been parsed. */ |
| 352 | if (http_code >= 400 && http_code < 600 && |
| 353 | (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) && |
| 354 | (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) { |
| 355 | end += strspn(end, SPACE_CHARS); |
| 356 | av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end); |
| 357 | return AVERROR(EIO); |
| 358 | } |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static int parse_location(HTTPContext *s, const char *p) |
| 363 | { |
| 364 | char redirected_location[MAX_URL_SIZE], *new_loc; |
| 365 | ff_make_absolute_url(redirected_location, sizeof(redirected_location), |
| 366 | s->location, p); |
| 367 | new_loc = av_strdup(redirected_location); |
| 368 | if (!new_loc) |
| 369 | return AVERROR(ENOMEM); |
| 370 | av_free(s->location); |
| 371 | s->location = new_loc; |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | /* "bytes $from-$to/$document_size" */ |
| 376 | static void parse_content_range(URLContext *h, const char *p) |
| 377 | { |
| 378 | HTTPContext *s = h->priv_data; |
| 379 | const char *slash; |
| 380 | |
| 381 | if (!strncmp(p, "bytes ", 6)) { |
| 382 | p += 6; |
| 383 | s->off = strtoll(p, NULL, 10); |
| 384 | if ((slash = strchr(p, '/')) && strlen(slash) > 0) |
| 385 | s->filesize = strtoll(slash + 1, NULL, 10); |
| 386 | } |
| 387 | if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647)) |
| 388 | h->is_streamed = 0; /* we _can_ in fact seek */ |
| 389 | } |
| 390 | |
| 391 | static int parse_content_encoding(URLContext *h, const char *p) |
| 392 | { |
| 393 | if (!av_strncasecmp(p, "gzip", 4) || |
| 394 | !av_strncasecmp(p, "deflate", 7)) { |
| 395 | #if CONFIG_ZLIB |
| 396 | HTTPContext *s = h->priv_data; |
| 397 | |
| 398 | s->compressed = 1; |
| 399 | inflateEnd(&s->inflate_stream); |
| 400 | if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) { |
| 401 | av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n", |
| 402 | s->inflate_stream.msg); |
| 403 | return AVERROR(ENOSYS); |
| 404 | } |
| 405 | if (zlibCompileFlags() & (1 << 17)) { |
| 406 | av_log(h, AV_LOG_WARNING, |
| 407 | "Your zlib was compiled without gzip support.\n"); |
| 408 | return AVERROR(ENOSYS); |
| 409 | } |
| 410 | #else |
| 411 | av_log(h, AV_LOG_WARNING, |
| 412 | "Compressed (%s) content, need zlib with gzip support\n", p); |
| 413 | return AVERROR(ENOSYS); |
| 414 | #endif /* CONFIG_ZLIB */ |
| 415 | } else if (!av_strncasecmp(p, "identity", 8)) { |
| 416 | // The normal, no-encoding case (although servers shouldn't include |
| 417 | // the header at all if this is the case). |
| 418 | } else { |
| 419 | av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p); |
| 420 | } |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | // Concat all Icy- header lines |
| 425 | static int parse_icy(HTTPContext *s, const char *tag, const char *p) |
| 426 | { |
| 427 | int len = 4 + strlen(p) + strlen(tag); |
| 428 | int is_first = !s->icy_metadata_headers; |
| 429 | int ret; |
| 430 | |
| 431 | av_dict_set(&s->metadata, tag, p, 0); |
| 432 | |
| 433 | if (s->icy_metadata_headers) |
| 434 | len += strlen(s->icy_metadata_headers); |
| 435 | |
| 436 | if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0) |
| 437 | return ret; |
| 438 | |
| 439 | if (is_first) |
| 440 | *s->icy_metadata_headers = '\0'; |
| 441 | |
| 442 | av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p); |
| 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int process_line(URLContext *h, char *line, int line_count, |
| 448 | int *new_location) |
| 449 | { |
| 450 | HTTPContext *s = h->priv_data; |
| 451 | char *tag, *p, *end; |
| 452 | int ret; |
| 453 | |
| 454 | /* end of header */ |
| 455 | if (line[0] == '\0') { |
| 456 | s->end_header = 1; |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | p = line; |
| 461 | if (line_count == 0) { |
| 462 | while (!av_isspace(*p) && *p != '\0') |
| 463 | p++; |
| 464 | while (av_isspace(*p)) |
| 465 | p++; |
| 466 | s->http_code = strtol(p, &end, 10); |
| 467 | |
| 468 | av_log(h, AV_LOG_DEBUG, "http_code=%d\n", s->http_code); |
| 469 | |
| 470 | if ((ret = check_http_code(h, s->http_code, end)) < 0) |
| 471 | return ret; |
| 472 | } else { |
| 473 | while (*p != '\0' && *p != ':') |
| 474 | p++; |
| 475 | if (*p != ':') |
| 476 | return 1; |
| 477 | |
| 478 | *p = '\0'; |
| 479 | tag = line; |
| 480 | p++; |
| 481 | while (av_isspace(*p)) |
| 482 | p++; |
| 483 | if (!av_strcasecmp(tag, "Location")) { |
| 484 | if ((ret = parse_location(s, p)) < 0) |
| 485 | return ret; |
| 486 | *new_location = 1; |
| 487 | } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) { |
| 488 | s->filesize = strtoll(p, NULL, 10); |
| 489 | } else if (!av_strcasecmp(tag, "Content-Range")) { |
| 490 | parse_content_range(h, p); |
| 491 | } else if (!av_strcasecmp(tag, "Accept-Ranges") && |
| 492 | !strncmp(p, "bytes", 5) && |
| 493 | s->seekable == -1) { |
| 494 | h->is_streamed = 0; |
| 495 | } else if (!av_strcasecmp(tag, "Transfer-Encoding") && |
| 496 | !av_strncasecmp(p, "chunked", 7)) { |
| 497 | s->filesize = -1; |
| 498 | s->chunksize = 0; |
| 499 | } else if (!av_strcasecmp(tag, "WWW-Authenticate")) { |
| 500 | ff_http_auth_handle_header(&s->auth_state, tag, p); |
| 501 | } else if (!av_strcasecmp(tag, "Authentication-Info")) { |
| 502 | ff_http_auth_handle_header(&s->auth_state, tag, p); |
| 503 | } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) { |
| 504 | ff_http_auth_handle_header(&s->proxy_auth_state, tag, p); |
| 505 | } else if (!av_strcasecmp(tag, "Connection")) { |
| 506 | if (!strcmp(p, "close")) |
| 507 | s->willclose = 1; |
| 508 | } else if (!av_strcasecmp(tag, "Server")) { |
| 509 | if (!av_strcasecmp(p, "AkamaiGHost")) { |
| 510 | s->is_akamai = 1; |
| 511 | } else if (!av_strncasecmp(p, "MediaGateway", 12)) { |
| 512 | s->is_mediagateway = 1; |
| 513 | } |
| 514 | } else if (!av_strcasecmp(tag, "Content-Type")) { |
| 515 | av_free(s->mime_type); |
| 516 | s->mime_type = av_strdup(p); |
| 517 | } else if (!av_strcasecmp(tag, "Set-Cookie")) { |
| 518 | if (!s->cookies) { |
| 519 | if (!(s->cookies = av_strdup(p))) |
| 520 | return AVERROR(ENOMEM); |
| 521 | } else { |
| 522 | char *tmp = s->cookies; |
| 523 | size_t str_size = strlen(tmp) + strlen(p) + 2; |
| 524 | if (!(s->cookies = av_malloc(str_size))) { |
| 525 | s->cookies = tmp; |
| 526 | return AVERROR(ENOMEM); |
| 527 | } |
| 528 | snprintf(s->cookies, str_size, "%s\n%s", tmp, p); |
| 529 | av_free(tmp); |
| 530 | } |
| 531 | } else if (!av_strcasecmp(tag, "Icy-MetaInt")) { |
| 532 | s->icy_metaint = strtoll(p, NULL, 10); |
| 533 | } else if (!av_strncasecmp(tag, "Icy-", 4)) { |
| 534 | if ((ret = parse_icy(s, tag, p)) < 0) |
| 535 | return ret; |
| 536 | } else if (!av_strcasecmp(tag, "Content-Encoding")) { |
| 537 | if ((ret = parse_content_encoding(h, p)) < 0) |
| 538 | return ret; |
| 539 | } |
| 540 | } |
| 541 | return 1; |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * Create a string containing cookie values for use as a HTTP cookie header |
| 546 | * field value for a particular path and domain from the cookie values stored in |
| 547 | * the HTTP protocol context. The cookie string is stored in *cookies. |
| 548 | * |
| 549 | * @return a negative value if an error condition occurred, 0 otherwise |
| 550 | */ |
| 551 | static int get_cookies(HTTPContext *s, char **cookies, const char *path, |
| 552 | const char *domain) |
| 553 | { |
| 554 | // cookie strings will look like Set-Cookie header field values. Multiple |
| 555 | // Set-Cookie fields will result in multiple values delimited by a newline |
| 556 | int ret = 0; |
| 557 | char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies; |
| 558 | |
| 559 | if (!set_cookies) return AVERROR(EINVAL); |
| 560 | |
| 561 | *cookies = NULL; |
| 562 | while ((cookie = av_strtok(set_cookies, "\n", &next))) { |
| 563 | int domain_offset = 0; |
| 564 | char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL; |
| 565 | set_cookies = NULL; |
| 566 | |
| 567 | while ((param = av_strtok(cookie, "; ", &next_param))) { |
| 568 | if (cookie) { |
| 569 | // first key-value pair is the actual cookie value |
| 570 | cvalue = av_strdup(param); |
| 571 | cookie = NULL; |
| 572 | } else if (!av_strncasecmp("path=", param, 5)) { |
| 573 | av_free(cpath); |
| 574 | cpath = av_strdup(¶m[5]); |
| 575 | } else if (!av_strncasecmp("domain=", param, 7)) { |
| 576 | // if the cookie specifies a sub-domain, skip the leading dot thereby |
| 577 | // supporting URLs that point to sub-domains and the master domain |
| 578 | int leading_dot = (param[7] == '.'); |
| 579 | av_free(cdomain); |
| 580 | cdomain = av_strdup(¶m[7+leading_dot]); |
| 581 | } else { |
| 582 | // ignore unknown attributes |
| 583 | } |
| 584 | } |
| 585 | if (!cdomain) |
| 586 | cdomain = av_strdup(domain); |
| 587 | |
| 588 | // ensure all of the necessary values are valid |
| 589 | if (!cdomain || !cpath || !cvalue) { |
| 590 | av_log(s, AV_LOG_WARNING, |
| 591 | "Invalid cookie found, no value, path or domain specified\n"); |
| 592 | goto done_cookie; |
| 593 | } |
| 594 | |
| 595 | // check if the request path matches the cookie path |
| 596 | if (av_strncasecmp(path, cpath, strlen(cpath))) |
| 597 | goto done_cookie; |
| 598 | |
| 599 | // the domain should be at least the size of our cookie domain |
| 600 | domain_offset = strlen(domain) - strlen(cdomain); |
| 601 | if (domain_offset < 0) |
| 602 | goto done_cookie; |
| 603 | |
| 604 | // match the cookie domain |
| 605 | if (av_strcasecmp(&domain[domain_offset], cdomain)) |
| 606 | goto done_cookie; |
| 607 | |
| 608 | // cookie parameters match, so copy the value |
| 609 | if (!*cookies) { |
| 610 | if (!(*cookies = av_strdup(cvalue))) { |
| 611 | ret = AVERROR(ENOMEM); |
| 612 | goto done_cookie; |
| 613 | } |
| 614 | } else { |
| 615 | char *tmp = *cookies; |
| 616 | size_t str_size = strlen(cvalue) + strlen(*cookies) + 3; |
| 617 | if (!(*cookies = av_malloc(str_size))) { |
| 618 | ret = AVERROR(ENOMEM); |
| 619 | goto done_cookie; |
| 620 | } |
| 621 | snprintf(*cookies, str_size, "%s; %s", tmp, cvalue); |
| 622 | av_free(tmp); |
| 623 | } |
| 624 | |
| 625 | done_cookie: |
| 626 | av_free(cdomain); |
| 627 | av_free(cpath); |
| 628 | av_free(cvalue); |
| 629 | if (ret < 0) { |
| 630 | if (*cookies) av_freep(cookies); |
| 631 | av_free(cset_cookies); |
| 632 | return ret; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | av_free(cset_cookies); |
| 637 | |
| 638 | return 0; |
| 639 | } |
| 640 | |
| 641 | static inline int has_header(const char *str, const char *header) |
| 642 | { |
| 643 | /* header + 2 to skip over CRLF prefix. (make sure you have one!) */ |
| 644 | if (!str) |
| 645 | return 0; |
| 646 | return av_stristart(str, header + 2, NULL) || av_stristr(str, header); |
| 647 | } |
| 648 | |
| 649 | static int http_read_header(URLContext *h, int *new_location) |
| 650 | { |
| 651 | HTTPContext *s = h->priv_data; |
| 652 | char line[MAX_URL_SIZE]; |
| 653 | int err = 0; |
| 654 | |
| 655 | s->chunksize = -1; |
| 656 | |
| 657 | for (;;) { |
| 658 | if ((err = http_get_line(s, line, sizeof(line))) < 0) |
| 659 | return err; |
| 660 | |
| 661 | av_log(h, AV_LOG_DEBUG, "header='%s'\n", line); |
| 662 | |
| 663 | err = process_line(h, line, s->line_count, new_location); |
| 664 | if (err < 0) |
| 665 | return err; |
| 666 | if (err == 0) |
| 667 | break; |
| 668 | s->line_count++; |
| 669 | } |
| 670 | |
| 671 | if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000) |
| 672 | h->is_streamed = 1; /* we can in fact _not_ seek */ |
| 673 | |
| 674 | return err; |
| 675 | } |
| 676 | |
| 677 | static int http_connect(URLContext *h, const char *path, const char *local_path, |
| 678 | const char *hoststr, const char *auth, |
| 679 | const char *proxyauth, int *new_location) |
| 680 | { |
| 681 | HTTPContext *s = h->priv_data; |
| 682 | int post, err; |
| 683 | char headers[HTTP_HEADERS_SIZE] = ""; |
| 684 | char *authstr = NULL, *proxyauthstr = NULL; |
| 685 | int64_t off = s->off; |
| 686 | int len = 0; |
| 687 | const char *method; |
| 688 | int send_expect_100 = 0; |
| 689 | |
| 690 | /* send http header */ |
| 691 | post = h->flags & AVIO_FLAG_WRITE; |
| 692 | |
| 693 | if (s->post_data) { |
| 694 | /* force POST method and disable chunked encoding when |
| 695 | * custom HTTP post data is set */ |
| 696 | post = 1; |
| 697 | s->chunked_post = 0; |
| 698 | } |
| 699 | |
| 700 | if (s->method) |
| 701 | method = s->method; |
| 702 | else |
| 703 | method = post ? "POST" : "GET"; |
| 704 | |
| 705 | authstr = ff_http_auth_create_response(&s->auth_state, auth, |
| 706 | local_path, method); |
| 707 | proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth, |
| 708 | local_path, method); |
| 709 | if (post && !s->post_data) { |
| 710 | send_expect_100 = s->send_expect_100; |
| 711 | /* The user has supplied authentication but we don't know the auth type, |
| 712 | * send Expect: 100-continue to get the 401 response including the |
| 713 | * WWW-Authenticate header, or an 100 continue if no auth actually |
| 714 | * is needed. */ |
| 715 | if (auth && *auth && |
| 716 | s->auth_state.auth_type == HTTP_AUTH_NONE && |
| 717 | s->http_code != 401) |
| 718 | send_expect_100 = 1; |
| 719 | } |
| 720 | |
| 721 | /* set default headers if needed */ |
| 722 | if (!has_header(s->headers, "\r\nUser-Agent: ")) |
| 723 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 724 | "User-Agent: %s\r\n", s->user_agent); |
| 725 | if (!has_header(s->headers, "\r\nAccept: ")) |
| 726 | len += av_strlcpy(headers + len, "Accept: */*\r\n", |
| 727 | sizeof(headers) - len); |
| 728 | // Note: we send this on purpose even when s->off is 0 when we're probing, |
| 729 | // since it allows us to detect more reliably if a (non-conforming) |
| 730 | // server supports seeking by analysing the reply headers. |
| 731 | if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) { |
| 732 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 733 | "Range: bytes=%"PRId64"-", s->off); |
| 734 | if (s->end_off) |
| 735 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 736 | "%"PRId64, s->end_off - 1); |
| 737 | len += av_strlcpy(headers + len, "\r\n", |
| 738 | sizeof(headers) - len); |
| 739 | } |
| 740 | if (send_expect_100 && !has_header(s->headers, "\r\nExpect: ")) |
| 741 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 742 | "Expect: 100-continue\r\n"); |
| 743 | |
| 744 | if (!has_header(s->headers, "\r\nConnection: ")) { |
| 745 | if (s->multiple_requests) |
| 746 | len += av_strlcpy(headers + len, "Connection: keep-alive\r\n", |
| 747 | sizeof(headers) - len); |
| 748 | else |
| 749 | len += av_strlcpy(headers + len, "Connection: close\r\n", |
| 750 | sizeof(headers) - len); |
| 751 | } |
| 752 | |
| 753 | if (!has_header(s->headers, "\r\nHost: ")) |
| 754 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 755 | "Host: %s\r\n", hoststr); |
| 756 | if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data) |
| 757 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 758 | "Content-Length: %d\r\n", s->post_datalen); |
| 759 | |
| 760 | if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type) |
| 761 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 762 | "Content-Type: %s\r\n", s->content_type); |
| 763 | if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) { |
| 764 | char *cookies = NULL; |
| 765 | if (!get_cookies(s, &cookies, path, hoststr) && cookies) { |
| 766 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 767 | "Cookie: %s\r\n", cookies); |
| 768 | av_free(cookies); |
| 769 | } |
| 770 | } |
| 771 | if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy) |
| 772 | len += av_strlcatf(headers + len, sizeof(headers) - len, |
| 773 | "Icy-MetaData: %d\r\n", 1); |
| 774 | |
| 775 | /* now add in custom headers */ |
| 776 | if (s->headers) |
| 777 | av_strlcpy(headers + len, s->headers, sizeof(headers) - len); |
| 778 | |
| 779 | snprintf(s->buffer, sizeof(s->buffer), |
| 780 | "%s %s HTTP/1.1\r\n" |
| 781 | "%s" |
| 782 | "%s" |
| 783 | "%s" |
| 784 | "%s%s" |
| 785 | "\r\n", |
| 786 | method, |
| 787 | path, |
| 788 | post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "", |
| 789 | headers, |
| 790 | authstr ? authstr : "", |
| 791 | proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : ""); |
| 792 | |
| 793 | av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer); |
| 794 | |
| 795 | if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) |
| 796 | goto done; |
| 797 | |
| 798 | if (s->post_data) |
| 799 | if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0) |
| 800 | goto done; |
| 801 | |
| 802 | /* init input buffer */ |
| 803 | s->buf_ptr = s->buffer; |
| 804 | s->buf_end = s->buffer; |
| 805 | s->line_count = 0; |
| 806 | s->off = 0; |
| 807 | s->icy_data_read = 0; |
| 808 | s->filesize = -1; |
| 809 | s->willclose = 0; |
| 810 | s->end_chunked_post = 0; |
| 811 | s->end_header = 0; |
| 812 | if (post && !s->post_data && !send_expect_100) { |
| 813 | /* Pretend that it did work. We didn't read any header yet, since |
| 814 | * we've still to send the POST data, but the code calling this |
| 815 | * function will check http_code after we return. */ |
| 816 | s->http_code = 200; |
| 817 | err = 0; |
| 818 | goto done; |
| 819 | } |
| 820 | |
| 821 | /* wait for header */ |
| 822 | err = http_read_header(h, new_location); |
| 823 | if (err < 0) |
| 824 | goto done; |
| 825 | |
| 826 | err = (off == s->off) ? 0 : -1; |
| 827 | done: |
| 828 | av_freep(&authstr); |
| 829 | av_freep(&proxyauthstr); |
| 830 | return err; |
| 831 | } |
| 832 | |
| 833 | static int http_buf_read(URLContext *h, uint8_t *buf, int size) |
| 834 | { |
| 835 | HTTPContext *s = h->priv_data; |
| 836 | int len; |
| 837 | /* read bytes from input buffer first */ |
| 838 | len = s->buf_end - s->buf_ptr; |
| 839 | if (len > 0) { |
| 840 | if (len > size) |
| 841 | len = size; |
| 842 | memcpy(buf, s->buf_ptr, len); |
| 843 | s->buf_ptr += len; |
| 844 | } else { |
| 845 | if ((!s->willclose || s->chunksize < 0) && |
| 846 | s->filesize >= 0 && s->off >= s->filesize) |
| 847 | return AVERROR_EOF; |
| 848 | len = ffurl_read(s->hd, buf, size); |
| 849 | } |
| 850 | if (len > 0) { |
| 851 | s->off += len; |
| 852 | if (s->chunksize > 0) |
| 853 | s->chunksize -= len; |
| 854 | } |
| 855 | return len; |
| 856 | } |
| 857 | |
| 858 | #if CONFIG_ZLIB |
| 859 | #define DECOMPRESS_BUF_SIZE (256 * 1024) |
| 860 | static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size) |
| 861 | { |
| 862 | HTTPContext *s = h->priv_data; |
| 863 | int ret; |
| 864 | |
| 865 | if (!s->inflate_buffer) { |
| 866 | s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE); |
| 867 | if (!s->inflate_buffer) |
| 868 | return AVERROR(ENOMEM); |
| 869 | } |
| 870 | |
| 871 | if (s->inflate_stream.avail_in == 0) { |
| 872 | int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE); |
| 873 | if (read <= 0) |
| 874 | return read; |
| 875 | s->inflate_stream.next_in = s->inflate_buffer; |
| 876 | s->inflate_stream.avail_in = read; |
| 877 | } |
| 878 | |
| 879 | s->inflate_stream.avail_out = size; |
| 880 | s->inflate_stream.next_out = buf; |
| 881 | |
| 882 | ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH); |
| 883 | if (ret != Z_OK && ret != Z_STREAM_END) |
| 884 | av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", |
| 885 | ret, s->inflate_stream.msg); |
| 886 | |
| 887 | return size - s->inflate_stream.avail_out; |
| 888 | } |
| 889 | #endif /* CONFIG_ZLIB */ |
| 890 | |
| 891 | static int http_read_stream(URLContext *h, uint8_t *buf, int size) |
| 892 | { |
| 893 | HTTPContext *s = h->priv_data; |
| 894 | int err, new_location; |
| 895 | |
| 896 | if (!s->hd) |
| 897 | return AVERROR_EOF; |
| 898 | |
| 899 | if (s->end_chunked_post && !s->end_header) { |
| 900 | err = http_read_header(h, &new_location); |
| 901 | if (err < 0) |
| 902 | return err; |
| 903 | } |
| 904 | |
| 905 | if (s->chunksize >= 0) { |
| 906 | if (!s->chunksize) { |
| 907 | char line[32]; |
| 908 | |
| 909 | do { |
| 910 | if ((err = http_get_line(s, line, sizeof(line))) < 0) |
| 911 | return err; |
| 912 | } while (!*line); /* skip CR LF from last chunk */ |
| 913 | |
| 914 | s->chunksize = strtoll(line, NULL, 16); |
| 915 | |
| 916 | av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", |
| 917 | s->chunksize); |
| 918 | |
| 919 | if (!s->chunksize) |
| 920 | return 0; |
| 921 | } |
| 922 | size = FFMIN(size, s->chunksize); |
| 923 | } |
| 924 | #if CONFIG_ZLIB |
| 925 | if (s->compressed) |
| 926 | return http_buf_read_compressed(h, buf, size); |
| 927 | #endif /* CONFIG_ZLIB */ |
| 928 | return http_buf_read(h, buf, size); |
| 929 | } |
| 930 | |
| 931 | // Like http_read_stream(), but no short reads. |
| 932 | // Assumes partial reads are an error. |
| 933 | static int http_read_stream_all(URLContext *h, uint8_t *buf, int size) |
| 934 | { |
| 935 | int pos = 0; |
| 936 | while (pos < size) { |
| 937 | int len = http_read_stream(h, buf + pos, size - pos); |
| 938 | if (len < 0) |
| 939 | return len; |
| 940 | pos += len; |
| 941 | } |
| 942 | return pos; |
| 943 | } |
| 944 | |
| 945 | static void update_metadata(HTTPContext *s, char *data) |
| 946 | { |
| 947 | char *key; |
| 948 | char *val; |
| 949 | char *end; |
| 950 | char *next = data; |
| 951 | |
| 952 | while (*next) { |
| 953 | key = next; |
| 954 | val = strstr(key, "='"); |
| 955 | if (!val) |
| 956 | break; |
| 957 | end = strstr(val, "';"); |
| 958 | if (!end) |
| 959 | break; |
| 960 | |
| 961 | *val = '\0'; |
| 962 | *end = '\0'; |
| 963 | val += 2; |
| 964 | |
| 965 | av_dict_set(&s->metadata, key, val, 0); |
| 966 | |
| 967 | next = end + 2; |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | static int store_icy(URLContext *h, int size) |
| 972 | { |
| 973 | HTTPContext *s = h->priv_data; |
| 974 | /* until next metadata packet */ |
| 975 | int remaining = s->icy_metaint - s->icy_data_read; |
| 976 | |
| 977 | if (remaining < 0) |
| 978 | return AVERROR_INVALIDDATA; |
| 979 | |
| 980 | if (!remaining) { |
| 981 | /* The metadata packet is variable sized. It has a 1 byte header |
| 982 | * which sets the length of the packet (divided by 16). If it's 0, |
| 983 | * the metadata doesn't change. After the packet, icy_metaint bytes |
| 984 | * of normal data follows. */ |
| 985 | uint8_t ch; |
| 986 | int len = http_read_stream_all(h, &ch, 1); |
| 987 | if (len < 0) |
| 988 | return len; |
| 989 | if (ch > 0) { |
| 990 | char data[255 * 16 + 1]; |
| 991 | int ret; |
| 992 | len = ch * 16; |
| 993 | ret = http_read_stream_all(h, data, len); |
| 994 | if (ret < 0) |
| 995 | return ret; |
| 996 | data[len + 1] = 0; |
| 997 | if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0) |
| 998 | return ret; |
| 999 | update_metadata(s, data); |
| 1000 | } |
| 1001 | s->icy_data_read = 0; |
| 1002 | remaining = s->icy_metaint; |
| 1003 | } |
| 1004 | |
| 1005 | return FFMIN(size, remaining); |
| 1006 | } |
| 1007 | |
| 1008 | static int http_read(URLContext *h, uint8_t *buf, int size) |
| 1009 | { |
| 1010 | HTTPContext *s = h->priv_data; |
| 1011 | |
| 1012 | if (s->icy_metaint > 0) { |
| 1013 | size = store_icy(h, size); |
| 1014 | if (size < 0) |
| 1015 | return size; |
| 1016 | } |
| 1017 | |
| 1018 | size = http_read_stream(h, buf, size); |
| 1019 | if (size > 0) |
| 1020 | s->icy_data_read += size; |
| 1021 | return size; |
| 1022 | } |
| 1023 | |
| 1024 | /* used only when posting data */ |
| 1025 | static int http_write(URLContext *h, const uint8_t *buf, int size) |
| 1026 | { |
| 1027 | char temp[11] = ""; /* 32-bit hex + CRLF + nul */ |
| 1028 | int ret; |
| 1029 | char crlf[] = "\r\n"; |
| 1030 | HTTPContext *s = h->priv_data; |
| 1031 | |
| 1032 | if (!s->chunked_post) { |
| 1033 | /* non-chunked data is sent without any special encoding */ |
| 1034 | return ffurl_write(s->hd, buf, size); |
| 1035 | } |
| 1036 | |
| 1037 | /* silently ignore zero-size data since chunk encoding that would |
| 1038 | * signal EOF */ |
| 1039 | if (size > 0) { |
| 1040 | /* upload data using chunked encoding */ |
| 1041 | snprintf(temp, sizeof(temp), "%x\r\n", size); |
| 1042 | |
| 1043 | if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 || |
| 1044 | (ret = ffurl_write(s->hd, buf, size)) < 0 || |
| 1045 | (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0) |
| 1046 | return ret; |
| 1047 | } |
| 1048 | return size; |
| 1049 | } |
| 1050 | |
| 1051 | static int http_shutdown(URLContext *h, int flags) |
| 1052 | { |
| 1053 | int ret = 0; |
| 1054 | char footer[] = "0\r\n\r\n"; |
| 1055 | HTTPContext *s = h->priv_data; |
| 1056 | |
| 1057 | /* signal end of chunked encoding if used */ |
| 1058 | if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) { |
| 1059 | ret = ffurl_write(s->hd, footer, sizeof(footer) - 1); |
| 1060 | ret = ret > 0 ? 0 : ret; |
| 1061 | s->end_chunked_post = 1; |
| 1062 | } |
| 1063 | |
| 1064 | return ret; |
| 1065 | } |
| 1066 | |
| 1067 | static int http_close(URLContext *h) |
| 1068 | { |
| 1069 | int ret = 0; |
| 1070 | HTTPContext *s = h->priv_data; |
| 1071 | |
| 1072 | #if CONFIG_ZLIB |
| 1073 | inflateEnd(&s->inflate_stream); |
| 1074 | av_freep(&s->inflate_buffer); |
| 1075 | #endif /* CONFIG_ZLIB */ |
| 1076 | |
| 1077 | if (!s->end_chunked_post) |
| 1078 | /* Close the write direction by sending the end of chunked encoding. */ |
| 1079 | ret = http_shutdown(h, h->flags); |
| 1080 | |
| 1081 | if (s->hd) |
| 1082 | ffurl_closep(&s->hd); |
| 1083 | av_dict_free(&s->chained_options); |
| 1084 | return ret; |
| 1085 | } |
| 1086 | |
| 1087 | static int64_t http_seek(URLContext *h, int64_t off, int whence) |
| 1088 | { |
| 1089 | HTTPContext *s = h->priv_data; |
| 1090 | URLContext *old_hd = s->hd; |
| 1091 | int64_t old_off = s->off; |
| 1092 | uint8_t old_buf[BUFFER_SIZE]; |
| 1093 | int old_buf_size, ret; |
| 1094 | AVDictionary *options = NULL; |
| 1095 | |
| 1096 | if (whence == AVSEEK_SIZE) |
| 1097 | return s->filesize; |
| 1098 | else if ((whence == SEEK_CUR && off == 0) || |
| 1099 | (whence == SEEK_SET && off == s->off)) |
| 1100 | return s->off; |
| 1101 | else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed) |
| 1102 | return AVERROR(ENOSYS); |
| 1103 | |
| 1104 | if (whence == SEEK_CUR) |
| 1105 | off += s->off; |
| 1106 | else if (whence == SEEK_END) |
| 1107 | off += s->filesize; |
| 1108 | else if (whence != SEEK_SET) |
| 1109 | return AVERROR(EINVAL); |
| 1110 | if (off < 0) |
| 1111 | return AVERROR(EINVAL); |
| 1112 | s->off = off; |
| 1113 | |
| 1114 | /* we save the old context in case the seek fails */ |
| 1115 | old_buf_size = s->buf_end - s->buf_ptr; |
| 1116 | memcpy(old_buf, s->buf_ptr, old_buf_size); |
| 1117 | s->hd = NULL; |
| 1118 | |
| 1119 | /* if it fails, continue on old connection */ |
| 1120 | av_dict_copy(&options, s->chained_options, 0); |
| 1121 | if ((ret = http_open_cnx(h, &options)) < 0) { |
| 1122 | av_dict_free(&options); |
| 1123 | memcpy(s->buffer, old_buf, old_buf_size); |
| 1124 | s->buf_ptr = s->buffer; |
| 1125 | s->buf_end = s->buffer + old_buf_size; |
| 1126 | s->hd = old_hd; |
| 1127 | s->off = old_off; |
| 1128 | return ret; |
| 1129 | } |
| 1130 | av_dict_free(&options); |
| 1131 | ffurl_close(old_hd); |
| 1132 | return off; |
| 1133 | } |
| 1134 | |
| 1135 | static int http_get_file_handle(URLContext *h) |
| 1136 | { |
| 1137 | HTTPContext *s = h->priv_data; |
| 1138 | return ffurl_get_file_handle(s->hd); |
| 1139 | } |
| 1140 | |
| 1141 | #define HTTP_CLASS(flavor) \ |
| 1142 | static const AVClass flavor ## _context_class = { \ |
| 1143 | .class_name = # flavor, \ |
| 1144 | .item_name = av_default_item_name, \ |
| 1145 | .option = options, \ |
| 1146 | .version = LIBAVUTIL_VERSION_INT, \ |
| 1147 | } |
| 1148 | |
| 1149 | #if CONFIG_HTTP_PROTOCOL |
| 1150 | HTTP_CLASS(http); |
| 1151 | |
| 1152 | URLProtocol ff_http_protocol = { |
| 1153 | .name = "http", |
| 1154 | .url_open2 = http_open, |
| 1155 | .url_read = http_read, |
| 1156 | .url_write = http_write, |
| 1157 | .url_seek = http_seek, |
| 1158 | .url_close = http_close, |
| 1159 | .url_get_file_handle = http_get_file_handle, |
| 1160 | .url_shutdown = http_shutdown, |
| 1161 | .priv_data_size = sizeof(HTTPContext), |
| 1162 | .priv_data_class = &http_context_class, |
| 1163 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
| 1164 | }; |
| 1165 | #endif /* CONFIG_HTTP_PROTOCOL */ |
| 1166 | |
| 1167 | #if CONFIG_HTTPS_PROTOCOL |
| 1168 | HTTP_CLASS(https); |
| 1169 | |
| 1170 | URLProtocol ff_https_protocol = { |
| 1171 | .name = "https", |
| 1172 | .url_open2 = http_open, |
| 1173 | .url_read = http_read, |
| 1174 | .url_write = http_write, |
| 1175 | .url_seek = http_seek, |
| 1176 | .url_close = http_close, |
| 1177 | .url_get_file_handle = http_get_file_handle, |
| 1178 | .url_shutdown = http_shutdown, |
| 1179 | .priv_data_size = sizeof(HTTPContext), |
| 1180 | .priv_data_class = &https_context_class, |
| 1181 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
| 1182 | }; |
| 1183 | #endif /* CONFIG_HTTPS_PROTOCOL */ |
| 1184 | |
| 1185 | #if CONFIG_HTTPPROXY_PROTOCOL |
| 1186 | static int http_proxy_close(URLContext *h) |
| 1187 | { |
| 1188 | HTTPContext *s = h->priv_data; |
| 1189 | if (s->hd) |
| 1190 | ffurl_closep(&s->hd); |
| 1191 | return 0; |
| 1192 | } |
| 1193 | |
| 1194 | static int http_proxy_open(URLContext *h, const char *uri, int flags) |
| 1195 | { |
| 1196 | HTTPContext *s = h->priv_data; |
| 1197 | char hostname[1024], hoststr[1024]; |
| 1198 | char auth[1024], pathbuf[1024], *path; |
| 1199 | char lower_url[100]; |
| 1200 | int port, ret = 0, attempts = 0; |
| 1201 | HTTPAuthType cur_auth_type; |
| 1202 | char *authstr; |
| 1203 | int new_loc; |
| 1204 | |
| 1205 | if( s->seekable == 1 ) |
| 1206 | h->is_streamed = 0; |
| 1207 | else |
| 1208 | h->is_streamed = 1; |
| 1209 | |
| 1210 | av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, |
| 1211 | pathbuf, sizeof(pathbuf), uri); |
| 1212 | ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); |
| 1213 | path = pathbuf; |
| 1214 | if (*path == '/') |
| 1215 | path++; |
| 1216 | |
| 1217 | ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port, |
| 1218 | NULL); |
| 1219 | redo: |
| 1220 | ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, |
| 1221 | &h->interrupt_callback, NULL); |
| 1222 | if (ret < 0) |
| 1223 | return ret; |
| 1224 | |
| 1225 | authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth, |
| 1226 | path, "CONNECT"); |
| 1227 | snprintf(s->buffer, sizeof(s->buffer), |
| 1228 | "CONNECT %s HTTP/1.1\r\n" |
| 1229 | "Host: %s\r\n" |
| 1230 | "Connection: close\r\n" |
| 1231 | "%s%s" |
| 1232 | "\r\n", |
| 1233 | path, |
| 1234 | hoststr, |
| 1235 | authstr ? "Proxy-" : "", authstr ? authstr : ""); |
| 1236 | av_freep(&authstr); |
| 1237 | |
| 1238 | if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) |
| 1239 | goto fail; |
| 1240 | |
| 1241 | s->buf_ptr = s->buffer; |
| 1242 | s->buf_end = s->buffer; |
| 1243 | s->line_count = 0; |
| 1244 | s->filesize = -1; |
| 1245 | cur_auth_type = s->proxy_auth_state.auth_type; |
| 1246 | |
| 1247 | /* Note: This uses buffering, potentially reading more than the |
| 1248 | * HTTP header. If tunneling a protocol where the server starts |
| 1249 | * the conversation, we might buffer part of that here, too. |
| 1250 | * Reading that requires using the proper ffurl_read() function |
| 1251 | * on this URLContext, not using the fd directly (as the tls |
| 1252 | * protocol does). This shouldn't be an issue for tls though, |
| 1253 | * since the client starts the conversation there, so there |
| 1254 | * is no extra data that we might buffer up here. |
| 1255 | */ |
| 1256 | ret = http_read_header(h, &new_loc); |
| 1257 | if (ret < 0) |
| 1258 | goto fail; |
| 1259 | |
| 1260 | attempts++; |
| 1261 | if (s->http_code == 407 && |
| 1262 | (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && |
| 1263 | s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) { |
| 1264 | ffurl_closep(&s->hd); |
| 1265 | goto redo; |
| 1266 | } |
| 1267 | |
| 1268 | if (s->http_code < 400) |
| 1269 | return 0; |
| 1270 | ret = AVERROR(EIO); |
| 1271 | |
| 1272 | fail: |
| 1273 | http_proxy_close(h); |
| 1274 | return ret; |
| 1275 | } |
| 1276 | |
| 1277 | static int http_proxy_write(URLContext *h, const uint8_t *buf, int size) |
| 1278 | { |
| 1279 | HTTPContext *s = h->priv_data; |
| 1280 | return ffurl_write(s->hd, buf, size); |
| 1281 | } |
| 1282 | |
| 1283 | URLProtocol ff_httpproxy_protocol = { |
| 1284 | .name = "httpproxy", |
| 1285 | .url_open = http_proxy_open, |
| 1286 | .url_read = http_buf_read, |
| 1287 | .url_write = http_proxy_write, |
| 1288 | .url_close = http_proxy_close, |
| 1289 | .url_get_file_handle = http_get_file_handle, |
| 1290 | .priv_data_size = sizeof(HTTPContext), |
| 1291 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
| 1292 | }; |
| 1293 | #endif /* CONFIG_HTTPPROXY_PROTOCOL */ |