diff options
Diffstat (limited to 'ffmpeg/libavformat/http.c')
| -rw-r--r-- | ffmpeg/libavformat/http.c | 1117 |
1 files changed, 0 insertions, 1117 deletions
diff --git a/ffmpeg/libavformat/http.c b/ffmpeg/libavformat/http.c deleted file mode 100644 index 0619e2a..0000000 --- a/ffmpeg/libavformat/http.c +++ /dev/null @@ -1,1117 +0,0 @@ -/* - * 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 "libavutil/avstring.h" -#include "avformat.h" -#include "internal.h" -#include "network.h" -#include "http.h" -#include "os_support.h" -#include "httpauth.h" -#include "url.h" -#include "libavutil/opt.h" - -#if CONFIG_ZLIB -#include <zlib.h> -#endif - -/* 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 - -typedef struct { - const AVClass *class; - URLContext *hd; - 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. */ - char *content_type; - char *user_agent; - int64_t off, filesize; - int icy_data_read; ///< how much data was read since last ICY metadata packet - int icy_metaint; ///< after how many bytes of read data a new metadata packet will be found - char *location; - HTTPAuthState auth_state; - HTTPAuthState proxy_auth_state; - char *headers; - int willclose; /**< Set if the server correctly handles Connection: close and will close the connection after feeding us the content. */ - int seekable; /**< Control seekability, 0 = disable, 1 = enable, -1 = probe. */ - int chunked_post; - int end_chunked_post; /**< A flag which indicates if the end of chunked encoding has been sent. */ - int end_header; /**< A flag which indicates we have finished to read POST reply. */ - int multiple_requests; /**< A flag which indicates if we use persistent connections. */ - uint8_t *post_data; - int post_datalen; - int is_akamai; - int is_mediagateway; - char *mime_type; - char *cookies; ///< holds newline (\n) delimited Set-Cookie header field values (without the "Set-Cookie: " field name) - int icy; - char *icy_metadata_headers; - char *icy_metadata_packet; -#if CONFIG_ZLIB - int compressed; - z_stream inflate_stream; - uint8_t *inflate_buffer; -#endif - AVDictionary *chained_options; - int send_expect_100; -} 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_INT, {.i64 = -1}, -1, 1, D }, -{"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", "force a content type", 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 }, -{"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", "set MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 }, -{"cookies", "set cookies to be sent in applicable future requests, use newline delimited Set-Cookie HTTP field value syntax", OFFSET(cookies), AV_OPT_TYPE_STRING, {0}, 0, 0, D }, -{"icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, -{"icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 }, -{"icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, {0}, 0, 0, 0 }, -{"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 }, -{NULL} -}; -#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,\ -} - -HTTP_CLASS(http); -HTTP_CLASS(https); - -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)->proxy_auth_state, - &((HTTPContext*)src->priv_data)->proxy_auth_state, - sizeof(HTTPAuthState)); -} - -/* return non zero if error */ -static int http_open_cnx(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, redirects = 0, attempts = 0; - HTTPAuthType cur_auth_type, cur_proxy_auth_type; - HTTPContext *s = h->priv_data; - - /* fill the dest addr */ - redo: - /* needed in any case to build the host string */ - 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 = getenv("http_proxy"); - use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) && - proxy_path != NULL && 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(&s->hd, buf, AVIO_FLAG_READ_WRITE, - &h->interrupt_callback, options); - if (err < 0) - goto fail; - } - - cur_auth_type = s->auth_state.auth_type; - cur_proxy_auth_type = s->auth_state.auth_type; - if (http_connect(h, path, local_path, hoststr, auth, proxyauth, &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); - return 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); - - 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; - - 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 = 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 = ffurl_read(s->hd, s->buffer, BUFFER_SIZE); - if (len < 0) { - return len; - } else if (len == 0) { - return -1; - } 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 process_line(URLContext *h, char *line, int line_count, - int *new_location) -{ - HTTPContext *s = h->priv_data; - char *tag, *p, *end; - - /* end of header */ - if (line[0] == '\0') { - s->end_header = 1; - return 0; - } - - p = line; - if (line_count == 0) { - while (!av_isspace(*p) && *p != '\0') - p++; - while (av_isspace(*p)) - p++; - s->http_code = strtol(p, &end, 10); - - av_log(h, AV_LOG_DEBUG, "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 - || s->auth_state.auth_type != HTTP_AUTH_NONE) && - (s->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", - s->http_code, end); - return -1; - } - } 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")) { - 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; - *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")) { - /* "bytes $from-$to/$document_size" */ - 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 */ - } 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 (!s->cookies) { - if (!(s->cookies = av_strdup(p))) - return AVERROR(ENOMEM); - } else { - char *tmp = s->cookies; - size_t str_size = strlen(tmp) + strlen(p) + 2; - if (!(s->cookies = av_malloc(str_size))) { - s->cookies = tmp; - return AVERROR(ENOMEM); - } - snprintf(s->cookies, str_size, "%s\n%s", tmp, p); - av_free(tmp); - } - } else if (!av_strcasecmp (tag, "Icy-MetaInt")) { - s->icy_metaint = strtoll(p, NULL, 10); - } else if (!av_strncasecmp(tag, "Icy-", 4)) { - // Concat all Icy- header lines - char *buf = av_asprintf("%s%s: %s\n", - s->icy_metadata_headers ? s->icy_metadata_headers : "", tag, p); - if (!buf) - return AVERROR(ENOMEM); - av_freep(&s->icy_metadata_headers); - s->icy_metadata_headers = buf; - } else if (!av_strcasecmp (tag, "Content-Encoding")) { - if (!av_strncasecmp(p, "gzip", 4) || !av_strncasecmp(p, "deflate", 7)) { -#if CONFIG_ZLIB - 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 - } 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 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); - - *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; - - while ((param = av_strtok(cookie, "; ", &next_param))) { - cookie = NULL; - if (!av_strncasecmp("path=", param, 5)) { - av_free(cpath); - cpath = av_strdup(¶m[5]); - } else if (!av_strncasecmp("domain=", param, 7)) { - av_free(cdomain); - cdomain = av_strdup(¶m[7]); - } else if (!av_strncasecmp("secure", param, 6) || - !av_strncasecmp("comment", param, 7) || - !av_strncasecmp("max-age", param, 7) || - !av_strncasecmp("version", param, 7)) { - // ignore Comment, Max-Age, Secure and Version - } else { - av_free(cvalue); - cvalue = av_strdup(param); - } - } - 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_free(cdomain); - av_free(cpath); - av_free(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_DEBUG, "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 */ - - 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[4096] = ""; - 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; - } - - 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->seekable == -1)) - len += av_strlcatf(headers + len, sizeof(headers) - len, - "Range: bytes=%"PRId64"-\r\n", s->off); - 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)) { - 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_freep(&authstr); - av_freep(&proxyauthstr); - - av_log(h, AV_LOG_DEBUG, "request: %s\n", s->buffer); - - 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->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; - } - - /* wait for header */ - err = http_read_header(h, new_location); - if (err < 0) - return err; - - return (off == s->off) ? 0 : -1; -} - - -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->filesize >= 0 && s->off >= s->filesize) - return AVERROR_EOF; - len = ffurl_read(s->hd, buf, size); - } - if (len > 0) { - s->off += len; - s->icy_data_read += 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 - -static int http_read(URLContext *h, uint8_t *buf, int size) -{ - HTTPContext *s = h->priv_data; - 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(;;) { - 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_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize); - - if (!s->chunksize) - return 0; - break; - } - } - size = FFMIN(size, s->chunksize); - } - if (s->icy_metaint > 0) { - int remaining = s->icy_metaint - s->icy_data_read; /* until next metadata packet */ - 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 follow. - int ch = http_getc(s); - if (ch < 0) - return ch; - if (ch > 0) { - char data[255 * 16 + 1]; - int n; - int ret; - ch *= 16; - for (n = 0; n < ch; n++) - data[n] = http_getc(s); - data[ch + 1] = 0; - if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0) - return ret; - } - s->icy_data_read = 0; - remaining = s->icy_metaint; - } - size = FFMIN(size, remaining); - } -#if CONFIG_ZLIB - if (s->compressed) - return http_buf_read_compressed(h, buf, size); -#endif - return http_buf_read(h, buf, 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) { - 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 - - 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(URLContext *h, int64_t off, int whence) -{ - 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; - AVDictionary *options = NULL; - - if (whence == AVSEEK_SIZE) - return s->filesize; - else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed) - return -1; - - /* 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 (whence == SEEK_CUR) - off += s->off; - else if (whence == SEEK_END) - off += s->filesize; - s->off = off; - - /* if it fails, continue on old connection */ - av_dict_copy(&options, s->chained_options, 0); - if (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; - } - av_dict_free(&options); - ffurl_close(old_hd); - return off; -} - -static int -http_get_file_handle(URLContext *h) -{ - HTTPContext *s = h->priv_data; - return ffurl_get_file_handle(s->hd); -} - -#if CONFIG_HTTP_PROTOCOL -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 -#if CONFIG_HTTPS_PROTOCOL -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 - -#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(&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_closep(&s->hd); - 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 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 |