X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fhttp.c;h=f82002cb86e0be5449c1059dbb959870d20b4611;hb=a28468d0daf4be14761c16a3ddd33266b2380123;hp=e26da072cc9b7ac236b880c249ebd5171dab992b;hpb=e55ebcc3f6cf1f00ffd56ef0f357dc8010c6e046;p=ffmpeg diff --git a/libavformat/http.c b/libavformat/http.c index e26da072cc9..f82002cb86e 100644 --- a/libavformat/http.c +++ b/libavformat/http.c @@ -1,40 +1,48 @@ /* - * HTTP protocol for ffmpeg client + * HTTP protocol for avconv client * Copyright (c) 2000, 2001 Fabrice Bellard * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; 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 +#endif /* CONFIG_ZLIB */ + #include "libavutil/avstring.h" +#include "libavutil/opt.h" + #include "avformat.h" -#include -#include +#include "http.h" +#include "httpauth.h" #include "internal.h" #include "network.h" -#include "http.h" #include "os_support.h" -#include "httpauth.h" -#include "libavcodec/opt.h" +#include "url.h" -/* XXX: POST protocol is not completely implemented because ffmpeg uses - only a subset of it. */ +/* XXX: POST protocol is not completely implemented because avconv uses + * only a subset of it. */ -/* used for protocol handling */ -#define BUFFER_SIZE 1024 +/* 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 typedef struct { @@ -43,137 +51,262 @@ typedef struct { unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end; int line_count; int http_code; - int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */ - int64_t off, filesize; - char location[MAX_URL_SIZE]; + /* Used if "Transfer-Encoding: chunked" otherwise -1. */ + int64_t chunksize; + int64_t off, end_off, filesize; + char *location; HTTPAuthState auth_state; - unsigned char headers[BUFFER_SIZE]; - int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */ + HTTPAuthState proxy_auth_state; + 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 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 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; } 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[] = { -{"chunksize", "use chunked transfer-encoding for posts, -1 disables it, 0 enables it", OFFSET(chunksize), FF_OPT_TYPE_INT64, 0, -1, 0 }, /* Default to 0, for chunked POSTs */ -{NULL} + { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E }, + { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E }, + { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 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, for compatibility with ffmpeg", 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_INT, { .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, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, + { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D }, + { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT }, + { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 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_INT, { .i64 = 0 }, 0, 1, E }, + { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 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", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, + { NULL } }; -static const AVClass httpcontext_class = { - "HTTP", av_default_item_name, options, LIBAVUTIL_VERSION_INT -}; - -static int http_connect(URLContext *h, const char *path, const char *hoststr, - const char *auth, int *new_location); -void ff_http_set_headers(URLContext *h, const char *headers) -{ - HTTPContext *s = h->priv_data; - int len = strlen(headers); - - if (len && strcmp("\r\n", headers + len - 2)) - av_log(NULL, AV_LOG_ERROR, "No trailing CRLF found in HTTP header.\n"); - - av_strlcpy(s->headers, headers, sizeof(s->headers)); -} - -void ff_http_set_chunked_transfer_encoding(URLContext *h, int is_chunked) -{ - ((HTTPContext*)h->priv_data)->chunksize = is_chunked ? 0 : -1; -} +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); 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)->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)); } -/* return non zero if error */ -static int http_open_cnx(URLContext *h) +static int http_open_cnx_internal(URLContext *h, AVDictionary **options) { - const char *path, *proxy_path; - char hostname[1024], hoststr[1024]; - char auth[1024]; - char path1[1024]; - char buf[1024]; - int port, use_proxy, err, location_changed = 0, redirects = 0; - HTTPAuthType cur_auth_type; + 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; - URLContext *hd = NULL; - - proxy_path = getenv("http_proxy"); - use_proxy = (proxy_path != NULL) && !getenv("no_proxy") && - av_strstart(proxy_path, "http://", NULL); - /* fill the dest addr */ - redo: - /* needed in any case to build the host string */ - av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, + 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); - if (use_proxy) { - av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, - NULL, 0, proxy_path); - path = s->location; - } else { - if (path1[0] == '\0') - path = "/"; - else - path = path1; + proxy_path = 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; - ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); - err = url_open(&hd, buf, URL_RDWR); + 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(&s->hd, buf, AVIO_FLAG_READ_WRITE, + &h->interrupt_callback, options); + if (err < 0) + return err; + } + + err = http_connect(h, path, local_path, hoststr, + auth, proxyauth, &location_changed); if (err < 0) - goto fail; + return err; - s->hd = hd; - cur_auth_type = s->auth_state.auth_type; - if (http_connect(h, path, hoststr, auth, &location_changed) < 0) + 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: + 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.auth_type != HTTP_AUTH_NONE) { - url_close(hd); + if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) && + s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) { + ffurl_close(s->hd); + s->hd = NULL; + 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_close(s->hd); + s->hd = NULL; goto redo; } else goto fail; } - if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) { + if ((s->http_code == 301 || s->http_code == 302 || + s->http_code == 303 || s->http_code == 307) && + location_changed == 1) { /* url moved, get next */ - url_close(hd); + ffurl_close(s->hd); + s->hd = NULL; 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 (hd) - url_close(hd); + +fail: + if (s->hd) + ffurl_close(s->hd); s->hd = NULL; return AVERROR(EIO); } -static int http_open(URLContext *h, const char *uri, int flags) +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); + + av_dict_copy(&options, s->chained_options, 0); + ret = http_open_cnx(h, &options); + av_dict_free(&options); + return ret; +} + +static int http_open(URLContext *h, const char *uri, int flags, + AVDictionary **options) { HTTPContext *s = h->priv_data; + int ret; h->is_streamed = 1; s->filesize = -1; - av_strlcpy(s->location, uri, sizeof(s->location)); + s->location = av_strdup(uri); + if (!s->location) + return AVERROR(ENOMEM); + if (options) + av_dict_copy(&s->chained_options, *options, 0); - return http_open_cnx(h); + 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 = http_open_cnx(h, options); + if (ret < 0) + av_dict_free(&s->chained_options); + return ret; } + static int http_getc(HTTPContext *s) { int len; if (s->buf_ptr >= s->buf_end) { - len = url_read(s->hd, s->buffer, BUFFER_SIZE); + len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); if (len < 0) { - return AVERROR(EIO); + return len; } else if (len == 0) { - return -1; + return AVERROR_EOF; } else { s->buf_ptr = s->buffer; s->buf_end = s->buffer + len; @@ -188,10 +321,10 @@ static int http_get_line(HTTPContext *s, char *line, int line_size) char *q; q = line; - for(;;) { + for (;;) { ch = http_getc(s); if (ch < 0) - return AVERROR(EIO); + return ch; if (ch == '\n') { /* process line */ if (q > line && q[-1] == '\r') @@ -206,70 +339,177 @@ static int http_get_line(HTTPContext *s, char *line, int line_size) } } +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 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); + } + 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 AVERROR(ENOSYS); + } + 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 process_line(URLContext *h, char *line, int line_count, int *new_location) { HTTPContext *s = h->priv_data; char *tag, *p, *end; + int ret; /* end of header */ - if (line[0] == '\0') + if (line[0] == '\0') { + s->end_header = 1; return 0; + } p = line; if (line_count == 0) { - while (!isspace(*p) && *p != '\0') + while (!av_isspace(*p) && *p != '\0') p++; - while (isspace(*p)) + while (av_isspace(*p)) p++; s->http_code = strtol(p, &end, 10); - dprintf(NULL, "http_code=%d\n", s->http_code); + av_dlog(NULL, "http_code=%d\n", s->http_code); - /* error codes are 4xx and 5xx, but regard 401 as a success, so we - * don't abort until all headers have been parsed. */ - if (s->http_code >= 400 && s->http_code < 600 && s->http_code != 401) { - end += strspn(end, SPACE_CHARS); - av_log(NULL, AV_LOG_WARNING, "HTTP error %d %s\n", - s->http_code, end); - return -1; - } + 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'; + *p = '\0'; tag = line; p++; - while (isspace(*p)) + while (av_isspace(*p)) p++; - if (!strcmp(tag, "Location")) { - strcpy(s->location, p); + if (!av_strcasecmp(tag, "Location")) { + if ((ret = parse_location(s, p)) < 0) + return ret; *new_location = 1; - } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) { - s->filesize = atoll(p); - } else if (!strcmp (tag, "Content-Range")) { - /* "bytes $from-$to/$document_size" */ - const char *slash; - if (!strncmp (p, "bytes ", 6)) { - p += 6; - s->off = atoll(p); - if ((slash = strchr(p, '/')) && strlen(slash) > 0) - s->filesize = atoll(slash+1); - } - h->is_streamed = 0; /* we _can_ in fact seek */ - } else if (!strcmp (tag, "Transfer-Encoding") && !strncasecmp(p, "chunked", 7)) { - s->filesize = -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)) { + h->is_streamed = 0; + } else if (!av_strcasecmp(tag, "Transfer-Encoding") && + !av_strncasecmp(p, "chunked", 7)) { + s->filesize = -1; s->chunksize = 0; - } else if (!strcmp (tag, "WWW-Authenticate")) { + } else if (!av_strcasecmp(tag, "WWW-Authenticate")) { ff_http_auth_handle_header(&s->auth_state, tag, p); - } else if (!strcmp (tag, "Authentication-Info")) { + } else if (!av_strcasecmp(tag, "Authentication-Info")) { ff_http_auth_handle_header(&s->auth_state, tag, p); - } else if (!strcmp (tag, "Connection")) { + } 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, "Content-Type")) { + av_free(s->mime_type); + s->mime_type = av_strdup(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; @@ -278,115 +518,265 @@ static int process_line(URLContext *h, char *line, int line_count, 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_connect(URLContext *h, const char *path, const char *hoststr, - const char *auth, int *new_location) +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_dlog(NULL, "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++; + } + + 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 line[1024]; - char headers[1024] = ""; - char *authstr = NULL; + 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 & URL_WRONLY; - authstr = ff_http_auth_create_response(&s->auth_state, auth, path, - post ? "POST" : "GET"); + 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", LIBAVFORMAT_IDENT); + 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); - if (!has_header(s->headers, "\r\nRange: ")) + // 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) { len += av_strlcatf(headers + len, sizeof(headers) - len, - "Range: bytes=%"PRId64"-\r\n", s->off); - if (!has_header(s->headers, "\r\nConnection: ")) - len += av_strlcpy(headers + len, "Connection: close\r\n", - 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\nIcy-MetaData: ") && s->icy) + len += av_strlcatf(headers + len, sizeof(headers) - len, + "Icy-MetaData: %d\r\n", 1); /* now add in custom headers */ - av_strlcpy(headers+len, s->headers, sizeof(headers)-len); + 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", - post ? "POST" : "GET", + method, path, - post && s->chunksize >= 0 ? "Transfer-Encoding: chunked\r\n" : "", + post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "", headers, - authstr ? authstr : ""); + authstr ? authstr : "", + proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : ""); av_freep(&authstr); - if (url_write(s->hd, s->buffer, strlen(s->buffer)) < 0) - return AVERROR(EIO); + av_freep(&proxyauthstr); + if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0) + return err; + + if (s->post_data) + if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0) + return err; /* init input buffer */ - s->buf_ptr = s->buffer; - s->buf_end = s->buffer; - s->line_count = 0; - s->off = 0; - s->filesize = -1; - s->willclose = 0; - if (post) { + 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; return 0; } - s->chunksize = -1; /* wait for header */ - for(;;) { - if (http_get_line(s, line, sizeof(line)) < 0) - return AVERROR(EIO); + err = http_read_header(h, new_location); + if (err < 0) + return err; - dprintf(NULL, "header='%s'\n", line); + return (off == s->off) ? 0 : -1; +} - err = process_line(h, line, s->line_count, new_location); - if (err < 0) - return err; - if (err == 0) - break; - s->line_count++; +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 { + if ((!s->willclose || s->chunksize < 0) && + s->filesize >= 0 && s->off >= s->filesize) + return AVERROR_EOF; + len = ffurl_read(s->hd, buf, size); } - - return (off == s->off) ? 0 : -1; + 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; -static int http_read(URLContext *h, uint8_t *buf, int size) + 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 int http_read_stream(URLContext *h, uint8_t *buf, int size) { HTTPContext *s = h->priv_data; - int len; + int err, new_location; + + 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]; - for(;;) { + for (;;) { do { - if (http_get_line(s, line, sizeof(line)) < 0) - return AVERROR(EIO); + 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); - dprintf(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize); + av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", + s->chunksize); if (!s->chunksize) return 0; @@ -395,24 +785,102 @@ static int http_read(URLContext *h, uint8_t *buf, int size) } 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 { - if (!s->willclose && s->filesize >= 0 && s->off >= s->filesize) - return AVERROR_EOF; - len = url_read(s->hd, buf, size); +#if CONFIG_ZLIB + if (s->compressed) + return http_buf_read_compressed(h, buf, size); +#endif /* CONFIG_ZLIB */ + return http_buf_read(h, buf, size); +} + +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; } - if (len > 0) { - s->off += len; - if (s->chunksize > 0) - s->chunksize -= 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; } - return len; +} + +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 */ @@ -423,9 +891,9 @@ static int http_write(URLContext *h, const uint8_t *buf, int size) char crlf[] = "\r\n"; HTTPContext *s = h->priv_data; - if (s->chunksize == -1) { + if (!s->chunked_post) { /* non-chunked data is sent without any special encoding */ - return url_write(s->hd, buf, size); + return ffurl_write(s->hd, buf, size); } /* silently ignore zero-size data since chunk encoding that would @@ -434,28 +902,47 @@ static int http_write(URLContext *h, const uint8_t *buf, int size) /* upload data using chunked encoding */ snprintf(temp, sizeof(temp), "%x\r\n", size); - if ((ret = url_write(s->hd, temp, strlen(temp))) < 0 || - (ret = url_write(s->hd, buf, size)) < 0 || - (ret = url_write(s->hd, crlf, sizeof(crlf) - 1)) < 0) + 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_close(URLContext *h) +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 ((h->flags & URL_WRONLY) && s->chunksize != -1) { - ret = url_write(s->hd, footer, sizeof(footer) - 1); + if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) { + 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) - url_close(s->hd); + ffurl_close(s->hd); + av_dict_free(&s->chained_options); return ret; } @@ -465,12 +952,16 @@ static int64_t http_seek(URLContext *h, int64_t off, int whence) URLContext *old_hd = s->hd; int64_t old_off = s->off; uint8_t old_buf[BUFFER_SIZE]; - int old_buf_size; + int old_buf_size, ret; + AVDictionary *options = NULL; if (whence == AVSEEK_SIZE) return s->filesize; + else if ((whence == SEEK_CUR && off == 0) || + (whence == SEEK_SET && off == s->off)) + return s->off; else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed) - return -1; + return AVERROR(ENOSYS); /* we save the old context in case the seek fails */ old_buf_size = s->buf_end - s->buf_ptr; @@ -483,33 +974,175 @@ static int64_t http_seek(URLContext *h, int64_t off, int whence) s->off = off; /* if it fails, continue on old connection */ - if (http_open_cnx(h) < 0) { + av_dict_copy(&options, s->chained_options, 0); + 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 -1; + s->hd = old_hd; + s->off = old_off; + return ret; } - url_close(old_hd); + av_dict_free(&options); + ffurl_close(old_hd); return off; } -static int -http_get_file_handle(URLContext *h) +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_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, +}; +#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, +}; +#endif /* CONFIG_HTTPS_PROTOCOL */ + +#if CONFIG_HTTPPROXY_PROTOCOL +static int http_proxy_close(URLContext *h) +{ + HTTPContext *s = h->priv_data; + if (s->hd) + ffurl_close(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; + + 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(&s->hd, lower_url, AVIO_FLAG_READ_WRITE, + &h->interrupt_callback, NULL); + 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_close(s->hd); + s->hd = NULL; + goto redo; + } + + if (s->http_code < 400) + return 0; + ret = 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 url_get_file_handle(s->hd); + return ffurl_write(s->hd, buf, size); } -URLProtocol http_protocol = { - "http", - http_open, - http_read, - http_write, - http_seek, - http_close, +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), - .priv_data_class = &httpcontext_class, + .priv_data_size = sizeof(HTTPContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, }; +#endif /* CONFIG_HTTPPROXY_PROTOCOL */