| /* |
| * HTTP protocol for ffmpeg client |
| * Copyright (c) 2000, 2001 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| |
| #if CONFIG_ZLIB |
| #include <zlib.h> |
| #endif /* CONFIG_ZLIB */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/time.h" |
| |
| #include "avformat.h" |
| #include "http.h" |
| #include "httpauth.h" |
| #include "internal.h" |
| #include "network.h" |
| #include "os_support.h" |
| #include "url.h" |
| |
| /* XXX: POST protocol is not completely implemented because ffmpeg uses |
| * only a subset of it. */ |
| |
| /* The IO buffer size is unrelated to the max URL size in itself, but needs |
| * to be large enough to fit the full request headers (including long |
| * path names). */ |
| #define BUFFER_SIZE MAX_URL_SIZE |
| #define MAX_REDIRECTS 8 |
| #define HTTP_SINGLE 1 |
| #define HTTP_MUTLI 2 |
| typedef enum { |
| LOWER_PROTO, |
| READ_HEADERS, |
| WRITE_REPLY_HEADERS, |
| FINISH |
| }HandshakeState; |
| |
| typedef struct HTTPContext { |
| const AVClass *class; |
| URLContext *hd; |
| unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end; |
| int line_count; |
| int http_code; |
| /* Used if "Transfer-Encoding: chunked" otherwise -1. */ |
| int64_t chunksize; |
| int64_t off, end_off, filesize; |
| char *location; |
| HTTPAuthState auth_state; |
| HTTPAuthState proxy_auth_state; |
| char *http_proxy; |
| char *headers; |
| char *mime_type; |
| char *user_agent; |
| char *content_type; |
| /* Set if the server correctly handles Connection: close and will close |
| * the connection after feeding us the content. */ |
| int willclose; |
| int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */ |
| int chunked_post; |
| /* A flag which indicates if the end of chunked encoding has been sent. */ |
| int end_chunked_post; |
| /* A flag which indicates we have finished to read POST reply. */ |
| int end_header; |
| /* A flag which indicates if we use persistent connections. */ |
| int multiple_requests; |
| uint8_t *post_data; |
| int post_datalen; |
| int is_akamai; |
| int is_mediagateway; |
| char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) |
| /* A dictionary containing cookies keyed by cookie name */ |
| AVDictionary *cookie_dict; |
| int icy; |
| /* how much data was read since the last ICY metadata packet */ |
| int icy_data_read; |
| /* after how many bytes of read data a new metadata packet will be found */ |
| int icy_metaint; |
| char *icy_metadata_headers; |
| char *icy_metadata_packet; |
| AVDictionary *metadata; |
| #if CONFIG_ZLIB |
| int compressed; |
| z_stream inflate_stream; |
| uint8_t *inflate_buffer; |
| #endif /* CONFIG_ZLIB */ |
| AVDictionary *chained_options; |
| int send_expect_100; |
| char *method; |
| int reconnect; |
| int reconnect_at_eof; |
| int reconnect_streamed; |
| int reconnect_delay; |
| int reconnect_delay_max; |
| int listen; |
| char *resource; |
| int reply_code; |
| int is_multi_client; |
| HandshakeState handshake_step; |
| int is_connected_server; |
| } HTTPContext; |
| |
| #define OFFSET(x) offsetof(HTTPContext, x) |
| #define D AV_OPT_FLAG_DECODING_PARAM |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION) |
| |
| static const AVOption options[] = { |
| { "seekable", "control seekability of connection", OFFSET(seekable), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D }, |
| { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E }, |
| { "http_proxy", "set HTTP proxy to tunnel through", OFFSET(http_proxy), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E }, |
| { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E }, |
| { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E }, |
| { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D }, |
| { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D }, |
| { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D | E }, |
| { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E }, |
| { "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 }, |
| { "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 }, |
| { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, D }, |
| { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT }, |
| { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_EXPORT }, |
| { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT }, |
| { "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"}, |
| { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"}, |
| { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"}, |
| { "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 }, |
| { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, D | E }, |
| { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D }, |
| { "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 }, |
| { "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 }, |
| { "reconnect", "auto reconnect after disconnect before EOF", OFFSET(reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D }, |
| { "reconnect_at_eof", "auto reconnect at EOF", OFFSET(reconnect_at_eof), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D }, |
| { "reconnect_streamed", "auto reconnect streamed / non seekable streams", OFFSET(reconnect_streamed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D }, |
| { "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 }, |
| { "listen", "listen on HTTP", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, D | E }, |
| { "resource", "The resource requested by a client", OFFSET(resource), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, |
| { "reply_code", "The http status code to return to a client", OFFSET(reply_code), AV_OPT_TYPE_INT, { .i64 = 200}, INT_MIN, 599, E}, |
| { NULL } |
| }; |
| |
| static int http_connect(URLContext *h, const char *path, const char *local_path, |
| const char *hoststr, const char *auth, |
| const char *proxyauth, int *new_location); |
| static int http_read_header(URLContext *h, int *new_location); |
| |
| void ff_http_init_auth_state(URLContext *dest, const URLContext *src) |
| { |
| memcpy(&((HTTPContext *)dest->priv_data)->auth_state, |
| &((HTTPContext *)src->priv_data)->auth_state, |
| sizeof(HTTPAuthState)); |
| memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state, |
| &((HTTPContext *)src->priv_data)->proxy_auth_state, |
| sizeof(HTTPAuthState)); |
| } |
| |
| static int http_open_cnx_internal(URLContext *h, AVDictionary **options) |
| { |
| const char *path, *proxy_path, *lower_proto = "tcp", *local_path; |
| char hostname[1024], hoststr[1024], proto[10]; |
| char auth[1024], proxyauth[1024] = ""; |
| char path1[MAX_URL_SIZE]; |
| char buf[1024], urlbuf[MAX_URL_SIZE]; |
| int port, use_proxy, err, location_changed = 0; |
| HTTPContext *s = h->priv_data; |
| |
| av_url_split(proto, sizeof(proto), auth, sizeof(auth), |
| hostname, sizeof(hostname), &port, |
| path1, sizeof(path1), s->location); |
| ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); |
| |
| proxy_path = s->http_proxy ? s->http_proxy : getenv("http_proxy"); |
| use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) && |
| proxy_path && av_strstart(proxy_path, "http://", NULL); |
| |
| if (!strcmp(proto, "https")) { |
| lower_proto = "tls"; |
| use_proxy = 0; |
| if (port < 0) |
| port = 443; |
| } |
| if (port < 0) |
| port = 80; |
| |
| if (path1[0] == '\0') |
| path = "/"; |
| else |
| path = path1; |
| local_path = path; |
| if (use_proxy) { |
| /* Reassemble the request URL without auth string - we don't |
| * want to leak the auth to the proxy. */ |
| ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s", |
| path1); |
| path = urlbuf; |
| av_url_split(NULL, 0, proxyauth, sizeof(proxyauth), |
| hostname, sizeof(hostname), &port, NULL, 0, proxy_path); |
| } |
| |
| ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL); |
| |
| if (!s->hd) { |
| err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE, |
| &h->interrupt_callback, options, |
| h->protocol_whitelist); |
| if (err < 0) |
| return err; |
| } |
| |
| err = http_connect(h, path, local_path, hoststr, |
| auth, proxyauth, &location_changed); |
| if (err < 0) |
| return err; |
| |
| return location_changed; |
| } |
| |
| /* return non zero if error */ |
| static int http_open_cnx(URLContext *h, AVDictionary **options) |
| { |
| HTTPAuthType cur_auth_type, cur_proxy_auth_type; |
| HTTPContext *s = h->priv_data; |
| int location_changed, attempts = 0, redirects = 0; |
| redo: |
| av_dict_copy(options, s->chained_options, 0); |
| |
| cur_auth_type = s->auth_state.auth_type; |
| cur_proxy_auth_type = s->auth_state.auth_type; |
| |
| location_changed = http_open_cnx_internal(h, options); |
| if (location_changed < 0) |
| goto fail; |
| |
| attempts++; |
| if (s->http_code == 401) { |
| if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) && |
| s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { |
| ffurl_closep(&s->hd); |
| goto redo; |
| } else |
| goto fail; |
| } |
| if (s->http_code == 407) { |
| if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && |
| s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { |
| ffurl_closep(&s->hd); |
| goto redo; |
| } else |
| goto fail; |
| } |
| if ((s->http_code == 301 || s->http_code == 302 || |
| s->http_code == 303 || s->http_code == 307) && |
| location_changed == 1) { |
| /* url moved, get next */ |
| ffurl_closep(&s->hd); |
| if (redirects++ >= MAX_REDIRECTS) |
| return AVERROR(EIO); |
| /* Restart the authentication process with the new target, which |
| * might use a different auth mechanism. */ |
| memset(&s->auth_state, 0, sizeof(s->auth_state)); |
| attempts = 0; |
| location_changed = 0; |
| goto redo; |
| } |
| return 0; |
| |
| fail: |
| if (s->hd) |
| ffurl_closep(&s->hd); |
| if (location_changed < 0) |
| return location_changed; |
| return ff_http_averror(s->http_code, AVERROR(EIO)); |
| } |
| |
| int ff_http_do_new_request(URLContext *h, const char *uri) |
| { |
| HTTPContext *s = h->priv_data; |
| AVDictionary *options = NULL; |
| int ret; |
| |
| s->off = 0; |
| s->icy_data_read = 0; |
| av_free(s->location); |
| s->location = av_strdup(uri); |
| if (!s->location) |
| return AVERROR(ENOMEM); |
| |
| ret = http_open_cnx(h, &options); |
| av_dict_free(&options); |
| return ret; |
| } |
| |
| int ff_http_averror(int status_code, int default_averror) |
| { |
| switch (status_code) { |
| case 400: return AVERROR_HTTP_BAD_REQUEST; |
| case 401: return AVERROR_HTTP_UNAUTHORIZED; |
| case 403: return AVERROR_HTTP_FORBIDDEN; |
| case 404: return AVERROR_HTTP_NOT_FOUND; |
| default: break; |
| } |
| if (status_code >= 400 && status_code <= 499) |
| return AVERROR_HTTP_OTHER_4XX; |
| else if (status_code >= 500) |
| return AVERROR_HTTP_SERVER_ERROR; |
| else |
| return default_averror; |
| } |
| |
| static int http_write_reply(URLContext* h, int status_code) |
| { |
| int ret, body = 0, reply_code, message_len; |
| const char *reply_text, *content_type; |
| HTTPContext *s = h->priv_data; |
| char message[BUFFER_SIZE]; |
| content_type = "text/plain"; |
| |
| if (status_code < 0) |
| body = 1; |
| switch (status_code) { |
| case AVERROR_HTTP_BAD_REQUEST: |
| case 400: |
| reply_code = 400; |
| reply_text = "Bad Request"; |
| break; |
| case AVERROR_HTTP_FORBIDDEN: |
| case 403: |
| reply_code = 403; |
| reply_text = "Forbidden"; |
| break; |
| case AVERROR_HTTP_NOT_FOUND: |
| case 404: |
| reply_code = 404; |
| reply_text = "Not Found"; |
| break; |
| case 200: |
| reply_code = 200; |
| reply_text = "OK"; |
| content_type = "application/octet-stream"; |
| break; |
| case AVERROR_HTTP_SERVER_ERROR: |
| case 500: |
| reply_code = 500; |
| reply_text = "Internal server error"; |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| if (body) { |
| s->chunked_post = 0; |
| message_len = snprintf(message, sizeof(message), |
| "HTTP/1.1 %03d %s\r\n" |
| "Content-Type: %s\r\n" |
| "Content-Length: %zu\r\n" |
| "\r\n" |
| "%03d %s\r\n", |
| reply_code, |
| reply_text, |
| content_type, |
| strlen(reply_text) + 6, // 3 digit status code + space + \r\n |
| reply_code, |
| reply_text); |
| } else { |
| s->chunked_post = 1; |
| message_len = snprintf(message, sizeof(message), |
| "HTTP/1.1 %03d %s\r\n" |
| "Content-Type: %s\r\n" |
| "Transfer-Encoding: chunked\r\n" |
| "\r\n", |
| reply_code, |
| reply_text, |
| content_type); |
| } |
| av_log(h, AV_LOG_TRACE, "HTTP reply header: \n%s----\n", message); |
| if ((ret = ffurl_write(s->hd, message, message_len)) < 0) |
| return ret; |
| return 0; |
| } |
| |
| static void handle_http_errors(URLContext *h, int error) |
| { |
| av_assert0(error < 0); |
| http_write_reply(h, error); |
| } |
| |
| static int http_handshake(URLContext *c) |
| { |
| int ret, err, new_location; |
| HTTPContext *ch = c->priv_data; |
| URLContext *cl = ch->hd; |
| switch (ch->handshake_step) { |
| case LOWER_PROTO: |
| av_log(c, AV_LOG_TRACE, "Lower protocol\n"); |
| if ((ret = ffurl_handshake(cl)) > 0) |
| return 2 + ret; |
| if (ret < 0) |
| return ret; |
| ch->handshake_step = READ_HEADERS; |
| ch->is_connected_server = 1; |
| return 2; |
| case READ_HEADERS: |
| av_log(c, AV_LOG_TRACE, "Read headers\n"); |
| if ((err = http_read_header(c, &new_location)) < 0) { |
| handle_http_errors(c, err); |
| return err; |
| } |
| ch->handshake_step = WRITE_REPLY_HEADERS; |
| return 1; |
| case WRITE_REPLY_HEADERS: |
| av_log(c, AV_LOG_TRACE, "Reply code: %d\n", ch->reply_code); |
| if ((err = http_write_reply(c, ch->reply_code)) < 0) |
| return err; |
| ch->handshake_step = FINISH; |
| return 1; |
| case FINISH: |
| return 0; |
| } |
| // this should never be reached. |
| return AVERROR(EINVAL); |
| } |
| |
| static int http_listen(URLContext *h, const char *uri, int flags, |
| AVDictionary **options) { |
| HTTPContext *s = h->priv_data; |
| int ret; |
| char hostname[1024], proto[10]; |
| char lower_url[100]; |
| const char *lower_proto = "tcp"; |
| int port; |
| av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, |
| NULL, 0, uri); |
| if (!strcmp(proto, "https")) |
| lower_proto = "tls"; |
| ff_url_join(lower_url, sizeof(lower_url), lower_proto, NULL, hostname, port, |
| NULL); |
| if ((ret = av_dict_set_int(options, "listen", s->listen, 0)) < 0) |
| goto fail; |
| if ((ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, |
| &h->interrupt_callback, options, |
| h->protocol_whitelist |
| )) < 0) |
| goto fail; |
| s->handshake_step = LOWER_PROTO; |
| if (s->listen == HTTP_SINGLE) { /* single client */ |
| s->reply_code = 200; |
| while ((ret = http_handshake(h)) > 0); |
| } |
| fail: |
| av_dict_free(&s->chained_options); |
| return ret; |
| } |
| |
| static int http_open(URLContext *h, const char *uri, int flags, |
| AVDictionary **options) |
| { |
| HTTPContext *s = h->priv_data; |
| int ret; |
| |
| if( s->seekable == 1 ) |
| h->is_streamed = 0; |
| else |
| h->is_streamed = 1; |
| |
| s->filesize = -1; |
| s->location = av_strdup(uri); |
| if (!s->location) |
| return AVERROR(ENOMEM); |
| if (options) |
| av_dict_copy(&s->chained_options, *options, 0); |
| |
| if (s->headers) { |
| int len = strlen(s->headers); |
| if (len < 2 || strcmp("\r\n", s->headers + len - 2)) { |
| av_log(h, AV_LOG_WARNING, |
| "No trailing CRLF found in HTTP header.\n"); |
| ret = av_reallocp(&s->headers, len + 3); |
| if (ret < 0) |
| return ret; |
| s->headers[len] = '\r'; |
| s->headers[len + 1] = '\n'; |
| s->headers[len + 2] = '\0'; |
| } |
| } |
| |
| if (s->listen) { |
| return http_listen(h, uri, flags, options); |
| } |
| ret = http_open_cnx(h, options); |
| if (ret < 0) |
| av_dict_free(&s->chained_options); |
| return ret; |
| } |
| |
| static int http_accept(URLContext *s, URLContext **c) |
| { |
| int ret; |
| HTTPContext *sc = s->priv_data; |
| HTTPContext *cc; |
| URLContext *sl = sc->hd; |
| URLContext *cl = NULL; |
| |
| av_assert0(sc->listen); |
| if ((ret = ffurl_alloc(c, s->filename, s->flags, &sl->interrupt_callback)) < 0) |
| goto fail; |
| cc = (*c)->priv_data; |
| if ((ret = ffurl_accept(sl, &cl)) < 0) |
| goto fail; |
| cc->hd = cl; |
| cc->is_multi_client = 1; |
| fail: |
| return ret; |
| } |
| |
| static int http_getc(HTTPContext *s) |
| { |
| int len; |
| if (s->buf_ptr >= s->buf_end) { |
| len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); |
| if (len < 0) { |
| return len; |
| } else if (len == 0) { |
| return AVERROR_EOF; |
| } else { |
| s->buf_ptr = s->buffer; |
| s->buf_end = s->buffer + len; |
| } |
| } |
| return *s->buf_ptr++; |
| } |
| |
| static int http_get_line(HTTPContext *s, char *line, int line_size) |
| { |
| int ch; |
| char *q; |
| |
| q = line; |
| for (;;) { |
| ch = http_getc(s); |
| if (ch < 0) |
| return ch; |
| if (ch == '\n') { |
| /* process line */ |
| if (q > line && q[-1] == '\r') |
| q--; |
| *q = '\0'; |
| |
| return 0; |
| } else { |
| if ((q - line) < line_size - 1) |
| *q++ = ch; |
| } |
| } |
| } |
| |
| static int check_http_code(URLContext *h, int http_code, const char *end) |
| { |
| HTTPContext *s = h->priv_data; |
| /* error codes are 4xx and 5xx, but regard 401 as a success, so we |
| * don't abort until all headers have been parsed. */ |
| if (http_code >= 400 && http_code < 600 && |
| (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) && |
| (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) { |
| end += strspn(end, SPACE_CHARS); |
| av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end); |
| return ff_http_averror(http_code, AVERROR(EIO)); |
| } |
| return 0; |
| } |
| |
| static int parse_location(HTTPContext *s, const char *p) |
| { |
| char redirected_location[MAX_URL_SIZE], *new_loc; |
| ff_make_absolute_url(redirected_location, sizeof(redirected_location), |
| s->location, p); |
| new_loc = av_strdup(redirected_location); |
| if (!new_loc) |
| return AVERROR(ENOMEM); |
| av_free(s->location); |
| s->location = new_loc; |
| return 0; |
| } |
| |
| /* "bytes $from-$to/$document_size" */ |
| static void parse_content_range(URLContext *h, const char *p) |
| { |
| HTTPContext *s = h->priv_data; |
| const char *slash; |
| |
| if (!strncmp(p, "bytes ", 6)) { |
| p += 6; |
| s->off = strtoll(p, NULL, 10); |
| if ((slash = strchr(p, '/')) && strlen(slash) > 0) |
| s->filesize = strtoll(slash + 1, NULL, 10); |
| } |
| if (s->seekable == -1 && (!s->is_akamai || s->filesize != 2147483647)) |
| h->is_streamed = 0; /* we _can_ in fact seek */ |
| } |
| |
| static int parse_content_encoding(URLContext *h, const char *p) |
| { |
| if (!av_strncasecmp(p, "gzip", 4) || |
| !av_strncasecmp(p, "deflate", 7)) { |
| #if CONFIG_ZLIB |
| HTTPContext *s = h->priv_data; |
| |
| s->compressed = 1; |
| inflateEnd(&s->inflate_stream); |
| if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) { |
| av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n", |
| s->inflate_stream.msg); |
| return AVERROR(ENOSYS); |
| } |
| if (zlibCompileFlags() & (1 << 17)) { |
| av_log(h, AV_LOG_WARNING, |
| "Your zlib was compiled without gzip support.\n"); |
| return AVERROR(ENOSYS); |
| } |
| #else |
| av_log(h, AV_LOG_WARNING, |
| "Compressed (%s) content, need zlib with gzip support\n", p); |
| return AVERROR(ENOSYS); |
| #endif /* CONFIG_ZLIB */ |
| } else if (!av_strncasecmp(p, "identity", 8)) { |
| // The normal, no-encoding case (although servers shouldn't include |
| // the header at all if this is the case). |
| } else { |
| av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p); |
| } |
| return 0; |
| } |
| |
| // Concat all Icy- header lines |
| static int parse_icy(HTTPContext *s, const char *tag, const char *p) |
| { |
| int len = 4 + strlen(p) + strlen(tag); |
| int is_first = !s->icy_metadata_headers; |
| int ret; |
| |
| av_dict_set(&s->metadata, tag, p, 0); |
| |
| if (s->icy_metadata_headers) |
| len += strlen(s->icy_metadata_headers); |
| |
| if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0) |
| return ret; |
| |
| if (is_first) |
| *s->icy_metadata_headers = '\0'; |
| |
| av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p); |
| |
| return 0; |
| } |
| |
| static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies) |
| { |
| char *eql, *name; |
| |
| // duplicate the cookie name (dict will dupe the value) |
| if (!(eql = strchr(p, '='))) return AVERROR(EINVAL); |
| if (!(name = av_strndup(p, eql - p))) return AVERROR(ENOMEM); |
| |
| // add the cookie to the dictionary |
| av_dict_set(cookies, name, eql, AV_DICT_DONT_STRDUP_KEY); |
| |
| return 0; |
| } |
| |
| static int cookie_string(AVDictionary *dict, char **cookies) |
| { |
| AVDictionaryEntry *e = NULL; |
| int len = 1; |
| |
| // determine how much memory is needed for the cookies string |
| while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)) |
| len += strlen(e->key) + strlen(e->value) + 1; |
| |
| // reallocate the cookies |
| e = NULL; |
| if (*cookies) av_free(*cookies); |
| *cookies = av_malloc(len); |
| if (!*cookies) return AVERROR(ENOMEM); |
| *cookies[0] = '\0'; |
| |
| // write out the cookies |
| while (e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX)) |
| av_strlcatf(*cookies, len, "%s%s\n", e->key, e->value); |
| |
| return 0; |
| } |
| |
| static int process_line(URLContext *h, char *line, int line_count, |
| int *new_location) |
| { |
| HTTPContext *s = h->priv_data; |
| const char *auto_method = h->flags & AVIO_FLAG_READ ? "POST" : "GET"; |
| char *tag, *p, *end, *method, *resource, *version; |
| int ret; |
| |
| /* end of header */ |
| if (line[0] == '\0') { |
| s->end_header = 1; |
| return 0; |
| } |
| |
| p = line; |
| if (line_count == 0) { |
| if (s->is_connected_server) { |
| // HTTP method |
| method = p; |
| while (*p && !av_isspace(*p)) |
| p++; |
| *(p++) = '\0'; |
| av_log(h, AV_LOG_TRACE, "Received method: %s\n", method); |
| if (s->method) { |
| if (av_strcasecmp(s->method, method)) { |
| av_log(h, AV_LOG_ERROR, "Received and expected HTTP method do not match. (%s expected, %s received)\n", |
| s->method, method); |
| return ff_http_averror(400, AVERROR(EIO)); |
| } |
| } else { |
| // use autodetected HTTP method to expect |
| av_log(h, AV_LOG_TRACE, "Autodetected %s HTTP method\n", auto_method); |
| if (av_strcasecmp(auto_method, method)) { |
| av_log(h, AV_LOG_ERROR, "Received and autodetected HTTP method did not match " |
| "(%s autodetected %s received)\n", auto_method, method); |
| return ff_http_averror(400, AVERROR(EIO)); |
| } |
| if (!(s->method = av_strdup(method))) |
| return AVERROR(ENOMEM); |
| } |
| |
| // HTTP resource |
| while (av_isspace(*p)) |
| p++; |
| resource = p; |
| while (!av_isspace(*p)) |
| p++; |
| *(p++) = '\0'; |
| av_log(h, AV_LOG_TRACE, "Requested resource: %s\n", resource); |
| if (!(s->resource = av_strdup(resource))) |
| return AVERROR(ENOMEM); |
| |
| // HTTP version |
| while (av_isspace(*p)) |
| p++; |
| version = p; |
| while (*p && !av_isspace(*p)) |
| p++; |
| *p = '\0'; |
| if (av_strncasecmp(version, "HTTP/", 5)) { |
| av_log(h, AV_LOG_ERROR, "Malformed HTTP version string.\n"); |
| return ff_http_averror(400, AVERROR(EIO)); |
| } |
| av_log(h, AV_LOG_TRACE, "HTTP version string: %s\n", version); |
| } else { |
| while (!av_isspace(*p) && *p != '\0') |
| p++; |
| while (av_isspace(*p)) |
| p++; |
| s->http_code = strtol(p, &end, 10); |
| |
| av_log(h, AV_LOG_TRACE, "http_code=%d\n", s->http_code); |
| |
| if ((ret = check_http_code(h, s->http_code, end)) < 0) |
| return ret; |
| } |
| } else { |
| while (*p != '\0' && *p != ':') |
| p++; |
| if (*p != ':') |
| return 1; |
| |
| *p = '\0'; |
| tag = line; |
| p++; |
| while (av_isspace(*p)) |
| p++; |
| if (!av_strcasecmp(tag, "Location")) { |
| if ((ret = parse_location(s, p)) < 0) |
| return ret; |
| *new_location = 1; |
| } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) { |
| s->filesize = strtoll(p, NULL, 10); |
| } else if (!av_strcasecmp(tag, "Content-Range")) { |
| parse_content_range(h, p); |
| } else if (!av_strcasecmp(tag, "Accept-Ranges") && |
| !strncmp(p, "bytes", 5) && |
| s->seekable == -1) { |
| h->is_streamed = 0; |
| } else if (!av_strcasecmp(tag, "Transfer-Encoding") && |
| !av_strncasecmp(p, "chunked", 7)) { |
| s->filesize = -1; |
| s->chunksize = 0; |
| } else if (!av_strcasecmp(tag, "WWW-Authenticate")) { |
| ff_http_auth_handle_header(&s->auth_state, tag, p); |
| } else if (!av_strcasecmp(tag, "Authentication-Info")) { |
| ff_http_auth_handle_header(&s->auth_state, tag, p); |
| } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) { |
| ff_http_auth_handle_header(&s->proxy_auth_state, tag, p); |
| } else if (!av_strcasecmp(tag, "Connection")) { |
| if (!strcmp(p, "close")) |
| s->willclose = 1; |
| } else if (!av_strcasecmp(tag, "Server")) { |
| if (!av_strcasecmp(p, "AkamaiGHost")) { |
| s->is_akamai = 1; |
| } else if (!av_strncasecmp(p, "MediaGateway", 12)) { |
| s->is_mediagateway = 1; |
| } |
| } else if (!av_strcasecmp(tag, "Content-Type")) { |
| av_free(s->mime_type); |
| s->mime_type = av_strdup(p); |
| } else if (!av_strcasecmp(tag, "Set-Cookie")) { |
| if (parse_cookie(s, p, &s->cookie_dict)) |
| av_log(h, AV_LOG_WARNING, "Unable to parse '%s'\n", p); |
| } else if (!av_strcasecmp(tag, "Icy-MetaInt")) { |
| s->icy_metaint = strtoll(p, NULL, 10); |
| } else if (!av_strncasecmp(tag, "Icy-", 4)) { |
| if ((ret = parse_icy(s, tag, p)) < 0) |
| return ret; |
| } else if (!av_strcasecmp(tag, "Content-Encoding")) { |
| if ((ret = parse_content_encoding(h, p)) < 0) |
| return ret; |
| } |
| } |
| return 1; |
| } |
| |
| /** |
| * Create a string containing cookie values for use as a HTTP cookie header |
| * field value for a particular path and domain from the cookie values stored in |
| * the HTTP protocol context. The cookie string is stored in *cookies. |
| * |
| * @return a negative value if an error condition occurred, 0 otherwise |
| */ |
| static int get_cookies(HTTPContext *s, char **cookies, const char *path, |
| const char *domain) |
| { |
| // cookie strings will look like Set-Cookie header field values. Multiple |
| // Set-Cookie fields will result in multiple values delimited by a newline |
| int ret = 0; |
| char *next, *cookie, *set_cookies = av_strdup(s->cookies), *cset_cookies = set_cookies; |
| |
| if (!set_cookies) return AVERROR(EINVAL); |
| |
| // destroy any cookies in the dictionary. |
| av_dict_free(&s->cookie_dict); |
| |
| *cookies = NULL; |
| while ((cookie = av_strtok(set_cookies, "\n", &next))) { |
| int domain_offset = 0; |
| char *param, *next_param, *cdomain = NULL, *cpath = NULL, *cvalue = NULL; |
| set_cookies = NULL; |
| |
| // store the cookie in a dict in case it is updated in the response |
| if (parse_cookie(s, cookie, &s->cookie_dict)) |
| av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie); |
| |
| while ((param = av_strtok(cookie, "; ", &next_param))) { |
| if (cookie) { |
| // first key-value pair is the actual cookie value |
| cvalue = av_strdup(param); |
| cookie = NULL; |
| } else if (!av_strncasecmp("path=", param, 5)) { |
| av_free(cpath); |
| cpath = av_strdup(¶m[5]); |
| } else if (!av_strncasecmp("domain=", param, 7)) { |
| // if the cookie specifies a sub-domain, skip the leading dot thereby |
| // supporting URLs that point to sub-domains and the master domain |
| int leading_dot = (param[7] == '.'); |
| av_free(cdomain); |
| cdomain = av_strdup(¶m[7+leading_dot]); |
| } else { |
| // ignore unknown attributes |
| } |
| } |
| if (!cdomain) |
| cdomain = av_strdup(domain); |
| |
| // ensure all of the necessary values are valid |
| if (!cdomain || !cpath || !cvalue) { |
| av_log(s, AV_LOG_WARNING, |
| "Invalid cookie found, no value, path or domain specified\n"); |
| goto done_cookie; |
| } |
| |
| // check if the request path matches the cookie path |
| if (av_strncasecmp(path, cpath, strlen(cpath))) |
| goto done_cookie; |
| |
| // the domain should be at least the size of our cookie domain |
| domain_offset = strlen(domain) - strlen(cdomain); |
| if (domain_offset < 0) |
| goto done_cookie; |
| |
| // match the cookie domain |
| if (av_strcasecmp(&domain[domain_offset], cdomain)) |
| goto done_cookie; |
| |
| // cookie parameters match, so copy the value |
| if (!*cookies) { |
| if (!(*cookies = av_strdup(cvalue))) { |
| ret = AVERROR(ENOMEM); |
| goto done_cookie; |
| } |
| } else { |
| char *tmp = *cookies; |
| size_t str_size = strlen(cvalue) + strlen(*cookies) + 3; |
| if (!(*cookies = av_malloc(str_size))) { |
| ret = AVERROR(ENOMEM); |
| goto done_cookie; |
| } |
| snprintf(*cookies, str_size, "%s; %s", tmp, cvalue); |
| av_free(tmp); |
| } |
| |
| done_cookie: |
| av_freep(&cdomain); |
| av_freep(&cpath); |
| av_freep(&cvalue); |
| if (ret < 0) { |
| if (*cookies) av_freep(cookies); |
| av_free(cset_cookies); |
| return ret; |
| } |
| } |
| |
| av_free(cset_cookies); |
| |
| return 0; |
| } |
| |
| static inline int has_header(const char *str, const char *header) |
| { |
| /* header + 2 to skip over CRLF prefix. (make sure you have one!) */ |
| if (!str) |
| return 0; |
| return av_stristart(str, header + 2, NULL) || av_stristr(str, header); |
| } |
| |
| static int http_read_header(URLContext *h, int *new_location) |
| { |
| HTTPContext *s = h->priv_data; |
| char line[MAX_URL_SIZE]; |
| int err = 0; |
| |
| s->chunksize = -1; |
| |
| for (;;) { |
| if ((err = http_get_line(s, line, sizeof(line))) < 0) |
| return err; |
| |
| av_log(h, AV_LOG_TRACE, "header='%s'\n", line); |
| |
| err = process_line(h, line, s->line_count, new_location); |
| if (err < 0) |
| return err; |
| if (err == 0) |
| break; |
| s->line_count++; |
| } |
| |
| if (s->seekable == -1 && s->is_mediagateway && s->filesize == 2000000000) |
| h->is_streamed = 1; /* we can in fact _not_ seek */ |
| |
| // add any new cookies into the existing cookie string |
| cookie_string(s->cookie_dict, &s->cookies); |
| av_dict_free(&s->cookie_dict); |
| |
| return err; |
| } |
| |
| static int http_connect(URLContext *h, const char *path, const char *local_path, |
| const char *hoststr, const char *auth, |
| const char *proxyauth, int *new_location) |
| { |
| HTTPContext *s = h->priv_data; |
| int post, err; |
| char headers[HTTP_HEADERS_SIZE] = ""; |
| char *authstr = NULL, *proxyauthstr = NULL; |
| int64_t off = s->off; |
| int len = 0; |
| const char *method; |
| int send_expect_100 = 0; |
| |
| /* send http header */ |
| post = h->flags & AVIO_FLAG_WRITE; |
| |
| if (s->post_data) { |
| /* force POST method and disable chunked encoding when |
| * custom HTTP post data is set */ |
| post = 1; |
| s->chunked_post = 0; |
| } |
| |
| if (s->method) |
| method = s->method; |
| else |
| method = post ? "POST" : "GET"; |
| |
| authstr = ff_http_auth_create_response(&s->auth_state, auth, |
| local_path, method); |
| proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth, |
| local_path, method); |
| if (post && !s->post_data) { |
| send_expect_100 = s->send_expect_100; |
| /* The user has supplied authentication but we don't know the auth type, |
| * send Expect: 100-continue to get the 401 response including the |
| * WWW-Authenticate header, or an 100 continue if no auth actually |
| * is needed. */ |
| if (auth && *auth && |
| s->auth_state.auth_type == HTTP_AUTH_NONE && |
| s->http_code != 401) |
| send_expect_100 = 1; |
| } |
| |
| /* set default headers if needed */ |
| if (!has_header(s->headers, "\r\nUser-Agent: ")) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "User-Agent: %s\r\n", s->user_agent); |
| if (!has_header(s->headers, "\r\nAccept: ")) |
| len += av_strlcpy(headers + len, "Accept: */*\r\n", |
| sizeof(headers) - len); |
| // Note: we send this on purpose even when s->off is 0 when we're probing, |
| // since it allows us to detect more reliably if a (non-conforming) |
| // server supports seeking by analysing the reply headers. |
| if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 || s->end_off || s->seekable == -1)) { |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Range: bytes=%"PRId64"-", s->off); |
| if (s->end_off) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "%"PRId64, s->end_off - 1); |
| len += av_strlcpy(headers + len, "\r\n", |
| sizeof(headers) - len); |
| } |
| if (send_expect_100 && !has_header(s->headers, "\r\nExpect: ")) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Expect: 100-continue\r\n"); |
| |
| if (!has_header(s->headers, "\r\nConnection: ")) { |
| if (s->multiple_requests) |
| len += av_strlcpy(headers + len, "Connection: keep-alive\r\n", |
| sizeof(headers) - len); |
| else |
| len += av_strlcpy(headers + len, "Connection: close\r\n", |
| sizeof(headers) - len); |
| } |
| |
| if (!has_header(s->headers, "\r\nHost: ")) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Host: %s\r\n", hoststr); |
| if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Content-Length: %d\r\n", s->post_datalen); |
| |
| if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Content-Type: %s\r\n", s->content_type); |
| if (!has_header(s->headers, "\r\nCookie: ") && s->cookies) { |
| char *cookies = NULL; |
| if (!get_cookies(s, &cookies, path, hoststr) && cookies) { |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Cookie: %s\r\n", cookies); |
| av_free(cookies); |
| } |
| } |
| if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy) |
| len += av_strlcatf(headers + len, sizeof(headers) - len, |
| "Icy-MetaData: %d\r\n", 1); |
| |
| /* now add in custom headers */ |
| if (s->headers) |
| av_strlcpy(headers + len, s->headers, sizeof(headers) - len); |
| |
| snprintf(s->buffer, sizeof(s->buffer), |
| "%s %s HTTP/1.1\r\n" |
| "%s" |
| "%s" |
| "%s" |
| "%s%s" |
| "\r\n", |
| method, |
| path, |
| post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "", |
| headers, |
| authstr ? authstr : "", |
| proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : ""); |
| |
| av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer); |
| |
| if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) |
| goto done; |
| |
| if (s->post_data) |
| if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0) |
| goto done; |
| |
| /* init input buffer */ |
| s->buf_ptr = s->buffer; |
| s->buf_end = s->buffer; |
| s->line_count = 0; |
| s->off = 0; |
| s->icy_data_read = 0; |
| s->filesize = -1; |
| s->willclose = 0; |
| s->end_chunked_post = 0; |
| s->end_header = 0; |
| if (post && !s->post_data && !send_expect_100) { |
| /* Pretend that it did work. We didn't read any header yet, since |
| * we've still to send the POST data, but the code calling this |
| * function will check http_code after we return. */ |
| s->http_code = 200; |
| err = 0; |
| goto done; |
| } |
| |
| /* wait for header */ |
| err = http_read_header(h, new_location); |
| if (err < 0) |
| goto done; |
| |
| if (*new_location) |
| s->off = off; |
| |
| err = (off == s->off) ? 0 : -1; |
| done: |
| av_freep(&authstr); |
| av_freep(&proxyauthstr); |
| return err; |
| } |
| |
| static int http_buf_read(URLContext *h, uint8_t *buf, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| int len; |
| /* read bytes from input buffer first */ |
| len = s->buf_end - s->buf_ptr; |
| if (len > 0) { |
| if (len > size) |
| len = size; |
| memcpy(buf, s->buf_ptr, len); |
| s->buf_ptr += len; |
| } else { |
| int64_t target_end = s->end_off ? s->end_off : s->filesize; |
| if ((!s->willclose || s->chunksize < 0) && |
| target_end >= 0 && s->off >= target_end) |
| return AVERROR_EOF; |
| len = ffurl_read(s->hd, buf, size); |
| if (!len && (!s->willclose || s->chunksize < 0) && |
| target_end >= 0 && s->off < target_end) { |
| av_log(h, AV_LOG_ERROR, |
| "Stream ends prematurely at %"PRId64", should be %"PRId64"\n", |
| s->off, target_end |
| ); |
| return AVERROR(EIO); |
| } |
| } |
| if (len > 0) { |
| s->off += len; |
| if (s->chunksize > 0) |
| s->chunksize -= len; |
| } |
| return len; |
| } |
| |
| #if CONFIG_ZLIB |
| #define DECOMPRESS_BUF_SIZE (256 * 1024) |
| static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| int ret; |
| |
| if (!s->inflate_buffer) { |
| s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE); |
| if (!s->inflate_buffer) |
| return AVERROR(ENOMEM); |
| } |
| |
| if (s->inflate_stream.avail_in == 0) { |
| int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE); |
| if (read <= 0) |
| return read; |
| s->inflate_stream.next_in = s->inflate_buffer; |
| s->inflate_stream.avail_in = read; |
| } |
| |
| s->inflate_stream.avail_out = size; |
| s->inflate_stream.next_out = buf; |
| |
| ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH); |
| if (ret != Z_OK && ret != Z_STREAM_END) |
| av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n", |
| ret, s->inflate_stream.msg); |
| |
| return size - s->inflate_stream.avail_out; |
| } |
| #endif /* CONFIG_ZLIB */ |
| |
| static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect); |
| |
| static int http_read_stream(URLContext *h, uint8_t *buf, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| int err, new_location, read_ret, seek_ret; |
| |
| if (!s->hd) |
| return AVERROR_EOF; |
| |
| if (s->end_chunked_post && !s->end_header) { |
| err = http_read_header(h, &new_location); |
| if (err < 0) |
| return err; |
| } |
| |
| if (s->chunksize >= 0) { |
| if (!s->chunksize) { |
| char line[32]; |
| |
| do { |
| if ((err = http_get_line(s, line, sizeof(line))) < 0) |
| return err; |
| } while (!*line); /* skip CR LF from last chunk */ |
| |
| s->chunksize = strtoll(line, NULL, 16); |
| |
| av_log(NULL, AV_LOG_TRACE, "Chunked encoding data size: %"PRId64"'\n", |
| s->chunksize); |
| |
| if (!s->chunksize) |
| return 0; |
| } |
| size = FFMIN(size, s->chunksize); |
| } |
| #if CONFIG_ZLIB |
| if (s->compressed) |
| return http_buf_read_compressed(h, buf, size); |
| #endif /* CONFIG_ZLIB */ |
| read_ret = http_buf_read(h, buf, size); |
| if ( (read_ret < 0 && s->reconnect && (!h->is_streamed || s->reconnect_streamed) && s->filesize > 0 && s->off < s->filesize) |
| || (read_ret == 0 && s->reconnect_at_eof && (!h->is_streamed || s->reconnect_streamed))) { |
| int64_t target = h->is_streamed ? 0 : s->off; |
| |
| if (s->reconnect_delay > s->reconnect_delay_max) |
| return AVERROR(EIO); |
| |
| av_log(h, AV_LOG_INFO, "Will reconnect at %"PRId64" error=%s.\n", s->off, av_err2str(read_ret)); |
| av_usleep(1000U*1000*s->reconnect_delay); |
| s->reconnect_delay = 1 + 2*s->reconnect_delay; |
| seek_ret = http_seek_internal(h, target, SEEK_SET, 1); |
| if (seek_ret != target) { |
| av_log(h, AV_LOG_ERROR, "Failed to reconnect at %"PRId64".\n", target); |
| return read_ret; |
| } |
| |
| read_ret = http_buf_read(h, buf, size); |
| } else |
| s->reconnect_delay = 0; |
| |
| return read_ret; |
| } |
| |
| // Like http_read_stream(), but no short reads. |
| // Assumes partial reads are an error. |
| static int http_read_stream_all(URLContext *h, uint8_t *buf, int size) |
| { |
| int pos = 0; |
| while (pos < size) { |
| int len = http_read_stream(h, buf + pos, size - pos); |
| if (len < 0) |
| return len; |
| pos += len; |
| } |
| return pos; |
| } |
| |
| static void update_metadata(HTTPContext *s, char *data) |
| { |
| char *key; |
| char *val; |
| char *end; |
| char *next = data; |
| |
| while (*next) { |
| key = next; |
| val = strstr(key, "='"); |
| if (!val) |
| break; |
| end = strstr(val, "';"); |
| if (!end) |
| break; |
| |
| *val = '\0'; |
| *end = '\0'; |
| val += 2; |
| |
| av_dict_set(&s->metadata, key, val, 0); |
| |
| next = end + 2; |
| } |
| } |
| |
| static int store_icy(URLContext *h, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| /* until next metadata packet */ |
| int remaining = s->icy_metaint - s->icy_data_read; |
| |
| if (remaining < 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (!remaining) { |
| /* The metadata packet is variable sized. It has a 1 byte header |
| * which sets the length of the packet (divided by 16). If it's 0, |
| * the metadata doesn't change. After the packet, icy_metaint bytes |
| * of normal data follows. */ |
| uint8_t ch; |
| int len = http_read_stream_all(h, &ch, 1); |
| if (len < 0) |
| return len; |
| if (ch > 0) { |
| char data[255 * 16 + 1]; |
| int ret; |
| len = ch * 16; |
| ret = http_read_stream_all(h, data, len); |
| if (ret < 0) |
| return ret; |
| data[len + 1] = 0; |
| if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0) |
| return ret; |
| update_metadata(s, data); |
| } |
| s->icy_data_read = 0; |
| remaining = s->icy_metaint; |
| } |
| |
| return FFMIN(size, remaining); |
| } |
| |
| static int http_read(URLContext *h, uint8_t *buf, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| |
| if (s->icy_metaint > 0) { |
| size = store_icy(h, size); |
| if (size < 0) |
| return size; |
| } |
| |
| size = http_read_stream(h, buf, size); |
| if (size > 0) |
| s->icy_data_read += size; |
| return size; |
| } |
| |
| /* used only when posting data */ |
| static int http_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| char temp[11] = ""; /* 32-bit hex + CRLF + nul */ |
| int ret; |
| char crlf[] = "\r\n"; |
| HTTPContext *s = h->priv_data; |
| |
| if (!s->chunked_post) { |
| /* non-chunked data is sent without any special encoding */ |
| return ffurl_write(s->hd, buf, size); |
| } |
| |
| /* silently ignore zero-size data since chunk encoding that would |
| * signal EOF */ |
| if (size > 0) { |
| /* upload data using chunked encoding */ |
| snprintf(temp, sizeof(temp), "%x\r\n", size); |
| |
| if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 || |
| (ret = ffurl_write(s->hd, buf, size)) < 0 || |
| (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0) |
| return ret; |
| } |
| return size; |
| } |
| |
| static int http_shutdown(URLContext *h, int flags) |
| { |
| int ret = 0; |
| char footer[] = "0\r\n\r\n"; |
| HTTPContext *s = h->priv_data; |
| |
| /* signal end of chunked encoding if used */ |
| if (((flags & AVIO_FLAG_WRITE) && s->chunked_post) || |
| ((flags & AVIO_FLAG_READ) && s->chunked_post && s->listen)) { |
| ret = ffurl_write(s->hd, footer, sizeof(footer) - 1); |
| ret = ret > 0 ? 0 : ret; |
| s->end_chunked_post = 1; |
| } |
| |
| return ret; |
| } |
| |
| static int http_close(URLContext *h) |
| { |
| int ret = 0; |
| HTTPContext *s = h->priv_data; |
| |
| #if CONFIG_ZLIB |
| inflateEnd(&s->inflate_stream); |
| av_freep(&s->inflate_buffer); |
| #endif /* CONFIG_ZLIB */ |
| |
| if (!s->end_chunked_post) |
| /* Close the write direction by sending the end of chunked encoding. */ |
| ret = http_shutdown(h, h->flags); |
| |
| if (s->hd) |
| ffurl_closep(&s->hd); |
| av_dict_free(&s->chained_options); |
| return ret; |
| } |
| |
| static int64_t http_seek_internal(URLContext *h, int64_t off, int whence, int force_reconnect) |
| { |
| HTTPContext *s = h->priv_data; |
| URLContext *old_hd = s->hd; |
| int64_t old_off = s->off; |
| uint8_t old_buf[BUFFER_SIZE]; |
| int old_buf_size, ret; |
| AVDictionary *options = NULL; |
| |
| if (whence == AVSEEK_SIZE) |
| return s->filesize; |
| else if (!force_reconnect && |
| ((whence == SEEK_CUR && off == 0) || |
| (whence == SEEK_SET && off == s->off))) |
| return s->off; |
| else if ((s->filesize == -1 && whence == SEEK_END)) |
| return AVERROR(ENOSYS); |
| |
| if (whence == SEEK_CUR) |
| off += s->off; |
| else if (whence == SEEK_END) |
| off += s->filesize; |
| else if (whence != SEEK_SET) |
| return AVERROR(EINVAL); |
| if (off < 0) |
| return AVERROR(EINVAL); |
| s->off = off; |
| |
| if (s->off && h->is_streamed) |
| return AVERROR(ENOSYS); |
| |
| /* we save the old context in case the seek fails */ |
| old_buf_size = s->buf_end - s->buf_ptr; |
| memcpy(old_buf, s->buf_ptr, old_buf_size); |
| s->hd = NULL; |
| |
| /* if it fails, continue on old connection */ |
| if ((ret = http_open_cnx(h, &options)) < 0) { |
| av_dict_free(&options); |
| memcpy(s->buffer, old_buf, old_buf_size); |
| s->buf_ptr = s->buffer; |
| s->buf_end = s->buffer + old_buf_size; |
| s->hd = old_hd; |
| s->off = old_off; |
| return ret; |
| } |
| av_dict_free(&options); |
| ffurl_close(old_hd); |
| return off; |
| } |
| |
| static int64_t http_seek(URLContext *h, int64_t off, int whence) |
| { |
| return http_seek_internal(h, off, whence, 0); |
| } |
| |
| static int http_get_file_handle(URLContext *h) |
| { |
| HTTPContext *s = h->priv_data; |
| return ffurl_get_file_handle(s->hd); |
| } |
| |
| #define HTTP_CLASS(flavor) \ |
| static const AVClass flavor ## _context_class = { \ |
| .class_name = # flavor, \ |
| .item_name = av_default_item_name, \ |
| .option = options, \ |
| .version = LIBAVUTIL_VERSION_INT, \ |
| } |
| |
| #if CONFIG_HTTP_PROTOCOL |
| HTTP_CLASS(http); |
| |
| URLProtocol ff_http_protocol = { |
| .name = "http", |
| .url_open2 = http_open, |
| .url_accept = http_accept, |
| .url_handshake = http_handshake, |
| .url_read = http_read, |
| .url_write = http_write, |
| .url_seek = http_seek, |
| .url_close = http_close, |
| .url_get_file_handle = http_get_file_handle, |
| .url_shutdown = http_shutdown, |
| .priv_data_size = sizeof(HTTPContext), |
| .priv_data_class = &http_context_class, |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto" |
| }; |
| #endif /* CONFIG_HTTP_PROTOCOL */ |
| |
| #if CONFIG_HTTPS_PROTOCOL |
| HTTP_CLASS(https); |
| |
| URLProtocol ff_https_protocol = { |
| .name = "https", |
| .url_open2 = http_open, |
| .url_read = http_read, |
| .url_write = http_write, |
| .url_seek = http_seek, |
| .url_close = http_close, |
| .url_get_file_handle = http_get_file_handle, |
| .url_shutdown = http_shutdown, |
| .priv_data_size = sizeof(HTTPContext), |
| .priv_data_class = &https_context_class, |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| .default_whitelist = "http,https,tls,rtp,tcp,udp,crypto" |
| }; |
| #endif /* CONFIG_HTTPS_PROTOCOL */ |
| |
| #if CONFIG_HTTPPROXY_PROTOCOL |
| static int http_proxy_close(URLContext *h) |
| { |
| HTTPContext *s = h->priv_data; |
| if (s->hd) |
| ffurl_closep(&s->hd); |
| return 0; |
| } |
| |
| static int http_proxy_open(URLContext *h, const char *uri, int flags) |
| { |
| HTTPContext *s = h->priv_data; |
| char hostname[1024], hoststr[1024]; |
| char auth[1024], pathbuf[1024], *path; |
| char lower_url[100]; |
| int port, ret = 0, attempts = 0; |
| HTTPAuthType cur_auth_type; |
| char *authstr; |
| int new_loc; |
| |
| if( s->seekable == 1 ) |
| h->is_streamed = 0; |
| else |
| h->is_streamed = 1; |
| |
| av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, |
| pathbuf, sizeof(pathbuf), uri); |
| ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL); |
| path = pathbuf; |
| if (*path == '/') |
| path++; |
| |
| ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port, |
| NULL); |
| redo: |
| ret = ffurl_open_whitelist(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, |
| &h->interrupt_callback, NULL, |
| h->protocol_whitelist); |
| if (ret < 0) |
| return ret; |
| |
| authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth, |
| path, "CONNECT"); |
| snprintf(s->buffer, sizeof(s->buffer), |
| "CONNECT %s HTTP/1.1\r\n" |
| "Host: %s\r\n" |
| "Connection: close\r\n" |
| "%s%s" |
| "\r\n", |
| path, |
| hoststr, |
| authstr ? "Proxy-" : "", authstr ? authstr : ""); |
| av_freep(&authstr); |
| |
| if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) |
| goto fail; |
| |
| s->buf_ptr = s->buffer; |
| s->buf_end = s->buffer; |
| s->line_count = 0; |
| s->filesize = -1; |
| cur_auth_type = s->proxy_auth_state.auth_type; |
| |
| /* Note: This uses buffering, potentially reading more than the |
| * HTTP header. If tunneling a protocol where the server starts |
| * the conversation, we might buffer part of that here, too. |
| * Reading that requires using the proper ffurl_read() function |
| * on this URLContext, not using the fd directly (as the tls |
| * protocol does). This shouldn't be an issue for tls though, |
| * since the client starts the conversation there, so there |
| * is no extra data that we might buffer up here. |
| */ |
| ret = http_read_header(h, &new_loc); |
| if (ret < 0) |
| goto fail; |
| |
| attempts++; |
| if (s->http_code == 407 && |
| (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) && |
| s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) { |
| ffurl_closep(&s->hd); |
| goto redo; |
| } |
| |
| if (s->http_code < 400) |
| return 0; |
| ret = ff_http_averror(s->http_code, AVERROR(EIO)); |
| |
| fail: |
| http_proxy_close(h); |
| return ret; |
| } |
| |
| static int http_proxy_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| HTTPContext *s = h->priv_data; |
| return ffurl_write(s->hd, buf, size); |
| } |
| |
| URLProtocol ff_httpproxy_protocol = { |
| .name = "httpproxy", |
| .url_open = http_proxy_open, |
| .url_read = http_buf_read, |
| .url_write = http_proxy_write, |
| .url_close = http_proxy_close, |
| .url_get_file_handle = http_get_file_handle, |
| .priv_data_size = sizeof(HTTPContext), |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |
| #endif /* CONFIG_HTTPPROXY_PROTOCOL */ |