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n3.4.14
libavformat/http.c
1 807 строк
60 KB
Wenxiang Qian
avformat/http: Fix Out-of-Bounds access in process_line()
24 мар 2019, 12:38
24 мар 2019, 12:38
3b4630c
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/* * 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 "libavutil/parseutils.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 #define MAX_EXPIRY 19 #define WHITESPACES " \n\t\r" 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. */ uint64_t chunksize; uint64_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; #if FF_API_HTTP_USER_AGENT char *user_agent_deprecated; #endif 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 */ uint64_t icy_data_read; /* after how many bytes of read data a new metadata packet will be found */ uint64_t 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 }, #if FF_API_HTTP_USER_AGENT { "user-agent", "override User-Agent header", OFFSET(user_agent_deprecated), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D }, #endif { "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, h->protocol_blacklist, h); 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 = s->content_type ? s->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: %"SIZE_SPECIFIER"\r\n" "%s" "\r\n" "%03d %s\r\n", reply_code, reply_text, content_type, strlen(reply_text) + 6, // 3 digit status code + space + \r\n s->headers ? s->headers : "", 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" "%s" "\r\n", reply_code, reply_text, content_type, s->headers ? s->headers : ""); } 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, h->protocol_blacklist, h )) < 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 = UINT64_MAX; 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; return 0; fail: if (c) { ffurl_closep(c); } 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 = strtoull(p, NULL, 10); if ((slash = strchr(p, '/')) && strlen(slash) > 0) s->filesize = strtoull(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_set_cookie_expiry_time(const char *exp_str, struct tm *buf) { char exp_buf[MAX_EXPIRY]; int i, j, exp_buf_len = MAX_EXPIRY-1; char *expiry; // strip off any punctuation or whitespace for (i = 0, j = 0; exp_str[i] != '\0' && j < exp_buf_len; i++) { if ((exp_str[i] >= '0' && exp_str[i] <= '9') || (exp_str[i] >= 'A' && exp_str[i] <= 'Z') || (exp_str[i] >= 'a' && exp_str[i] <= 'z')) { exp_buf[j] = exp_str[i]; j++; } } exp_buf[j] = '\0'; expiry = exp_buf; // move the string beyond the day of week while ((*expiry < '0' || *expiry > '9') && *expiry != '\0') expiry++; return av_small_strptime(expiry, "%d%b%Y%H%M%S", buf) ? 0 : AVERROR(EINVAL); } static int parse_set_cookie(const char *set_cookie, AVDictionary **dict) { char *param, *next_param, *cstr, *back; if (!(cstr = av_strdup(set_cookie))) return AVERROR(EINVAL); // strip any trailing whitespace back = &cstr[strlen(cstr)-1]; while (strchr(WHITESPACES, *back)) { *back='\0'; back--; } next_param = cstr; while ((param = av_strtok(next_param, ";", &next_param))) { char *name, *value; param += strspn(param, WHITESPACES); if ((name = av_strtok(param, "=", &value))) { if (av_dict_set(dict, name, value, 0) < 0) { av_free(cstr); return -1; } } } av_free(cstr); return 0; } static int parse_cookie(HTTPContext *s, const char *p, AVDictionary **cookies) { AVDictionary *new_params = NULL; AVDictionaryEntry *e, *cookie_entry; char *eql, *name; // ensure the cookie is parsable if (parse_set_cookie(p, &new_params)) return -1; // if there is no cookie value there is nothing to parse cookie_entry = av_dict_get(new_params, "", NULL, AV_DICT_IGNORE_SUFFIX); if (!cookie_entry || !cookie_entry->value) { av_dict_free(&new_params); return -1; } // ensure the cookie is not expired or older than an existing value if ((e = av_dict_get(new_params, "expires", NULL, 0)) && e->value) { struct tm new_tm = {0}; if (!parse_set_cookie_expiry_time(e->value, &new_tm)) { AVDictionaryEntry *e2; // if the cookie has already expired ignore it if (av_timegm(&new_tm) < av_gettime() / 1000000) { av_dict_free(&new_params); return -1; } // only replace an older cookie with the same name e2 = av_dict_get(*cookies, cookie_entry->key, NULL, 0); if (e2 && e2->value) { AVDictionary *old_params = NULL; if (!parse_set_cookie(p, &old_params)) { e2 = av_dict_get(old_params, "expires", NULL, 0); if (e2 && e2->value) { struct tm old_tm = {0}; if (!parse_set_cookie_expiry_time(e->value, &old_tm)) { if (av_timegm(&new_tm) < av_timegm(&old_tm)) { av_dict_free(&new_params); av_dict_free(&old_params); return -1; } } } } av_dict_free(&old_params); } } } // 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 (*p && !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 == UINT64_MAX) { s->filesize = strtoull(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 = UINT64_MAX; 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 = strtoull(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 *cookie, *set_cookies = av_strdup(s->cookies), *next = 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(next, "\n", &next))) { AVDictionary *cookie_params = NULL; AVDictionaryEntry *cookie_entry, *e; // 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); // continue on to the next cookie if this one cannot be parsed if (parse_set_cookie(cookie, &cookie_params)) continue; // if the cookie has no value, skip it cookie_entry = av_dict_get(cookie_params, "", NULL, AV_DICT_IGNORE_SUFFIX); if (!cookie_entry || !cookie_entry->value) { av_dict_free(&cookie_params); continue; } // if the cookie has expired, don't add it if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) { struct tm tm_buf = {0}; if (!parse_set_cookie_expiry_time(e->value, &tm_buf)) { if (av_timegm(&tm_buf) < av_gettime() / 1000000) { av_dict_free(&cookie_params); continue; } } } // if no domain in the cookie assume it appied to this request if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) { // find the offset comparison is on the min domain (b.com, not a.b.com) int domain_offset = strlen(domain) - strlen(e->value); if (domain_offset < 0) { av_dict_free(&cookie_params); continue; } // match the cookie domain if (av_strcasecmp(&domain[domain_offset], e->value)) { av_dict_free(&cookie_params); continue; } } // ensure this cookie matches the path e = av_dict_get(cookie_params, "path", NULL, 0); if (!e || av_strncasecmp(path, e->value, strlen(e->value))) { av_dict_free(&cookie_params); continue; } // cookie parameters match, so copy the value if (!*cookies) { if (!(*cookies = av_asprintf("%s=%s", cookie_entry->key, cookie_entry->value))) { ret = AVERROR(ENOMEM); break; } } else { char *tmp = *cookies; size_t str_size = strlen(cookie_entry->key) + strlen(cookie_entry->value) + strlen(*cookies) + 4; if (!(*cookies = av_malloc(str_size))) { ret = AVERROR(ENOMEM); av_free(tmp); break; } snprintf(*cookies, str_size, "%s; %s=%s", tmp, cookie_entry->key, cookie_entry->value); av_free(tmp); } } av_free(set_cookies); return ret; } 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 = UINT64_MAX; 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; uint64_t off = s->off; int len = 0; const char *method; int send_expect_100 = 0; int ret; /* 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; } #if FF_API_HTTP_USER_AGENT if (strcmp(s->user_agent_deprecated, DEFAULT_USER_AGENT)) { av_log(s, AV_LOG_WARNING, "the user-agent option is deprecated, please use user_agent option\n"); s->user_agent = av_strdup(s->user_agent_deprecated); } #endif /* 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=%"PRIu64"-", 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); ret = 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 (strlen(headers) + 1 == sizeof(headers) || ret >= sizeof(s->buffer)) { av_log(h, AV_LOG_ERROR, "overlong headers\n"); err = AVERROR(EINVAL); goto done; } 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 = UINT64_MAX; s->willclose = 0; s->end_chunked_post = 0; s->end_header = 0; #if CONFIG_ZLIB s->compressed = 0; #endif 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; if (s->chunksize != UINT64_MAX) { if (!s->chunksize) { char line[32]; int err; do { if ((err = http_get_line(s, line, sizeof(line))) < 0) return err; } while (!*line); /* skip CR LF from last chunk */ s->chunksize = strtoull(line, NULL, 16); av_log(h, AV_LOG_TRACE, "Chunked encoding data size: %"PRIu64"'\n", s->chunksize); if (!s->chunksize) return 0; else if (s->chunksize == UINT64_MAX) { av_log(h, AV_LOG_ERROR, "Invalid chunk size %"PRIu64"\n", s->chunksize); return AVERROR(EINVAL); } } size = FFMIN(size, s->chunksize); } /* 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 { uint64_t target_end = s->end_off ? s->end_off : s->filesize; if ((!s->willclose || s->chunksize == UINT64_MAX) && s->off >= target_end) return AVERROR_EOF; len = ffurl_read(s->hd, buf, size); if (!len && (!s->willclose || s->chunksize == UINT64_MAX) && s->off < target_end) { av_log(h, AV_LOG_ERROR, "Stream ends prematurely at %"PRIu64", should be %"PRIu64"\n", s->off, target_end ); return AVERROR(EIO); } } if (len > 0) { s->off += len; if (s->chunksize > 0 && s->chunksize != UINT64_MAX) { av_assert0(s->chunksize >= len); 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; int64_t 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 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))) { uint64_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 %"PRIu64" 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 %"PRIu64".\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 */ uint64_t remaining; if (s->icy_metaint < s->icy_data_read) return AVERROR_INVALIDDATA; remaining = s->icy_metaint - s->icy_data_read; 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; uint64_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 == UINT64_MAX && 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); } static int http_get_short_seek(URLContext *h) { HTTPContext *s = h->priv_data; return ffurl_get_short_seek(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); const 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_get_short_seek = http_get_short_seek, .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,httpproxy" }; #endif /* CONFIG_HTTP_PROTOCOL */ #if CONFIG_HTTPS_PROTOCOL HTTP_CLASS(https); const 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_get_short_seek = http_get_short_seek, .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,httpproxy" }; #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, h->protocol_blacklist, h); 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 = UINT64_MAX; 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); } const 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 */