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-rw-r--r--libavformat/http.c254
1 files changed, 225 insertions, 29 deletions
diff --git a/libavformat/http.c b/libavformat/http.c
index 57b9569863..1b21e47c29 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -1,21 +1,21 @@
/*
- * HTTP protocol for avconv client
+ * HTTP protocol for ffmpeg client
* Copyright (c) 2000, 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -33,7 +33,7 @@
#include <zlib.h>
#endif
-/* XXX: POST protocol is not completely implemented because avconv uses
+/* 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
@@ -50,18 +50,29 @@ typedef struct {
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[MAX_URL_SIZE];
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;
+ 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;
@@ -73,11 +84,20 @@ typedef struct {
#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", "custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|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", "custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = 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, 0 },
+{"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 },
{NULL}
};
#define HTTP_CLASS(flavor)\
@@ -169,8 +189,7 @@ static int http_open_cnx(URLContext *h, AVDictionary **options)
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_close(s->hd);
- s->hd = NULL;
+ ffurl_closep(&s->hd);
goto redo;
} else
goto fail;
@@ -178,8 +197,7 @@ static int http_open_cnx(URLContext *h, AVDictionary **options)
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;
+ ffurl_closep(&s->hd);
goto redo;
} else
goto fail;
@@ -187,8 +205,7 @@ static int http_open_cnx(URLContext *h, AVDictionary **options)
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_close(s->hd);
- s->hd = NULL;
+ ffurl_closep(&s->hd);
if (redirects++ >= MAX_REDIRECTS)
return AVERROR(EIO);
/* Restart the authentication process with the new target, which
@@ -201,8 +218,7 @@ static int http_open_cnx(URLContext *h, AVDictionary **options)
return 0;
fail:
if (s->hd)
- ffurl_close(s->hd);
- s->hd = NULL;
+ ffurl_closep(&s->hd);
return AVERROR(EIO);
}
@@ -213,6 +229,7 @@ int ff_http_do_new_request(URLContext *h, const char *uri)
int ret;
s->off = 0;
+ s->icy_data_read = 0;
av_strlcpy(s->location, uri, sizeof(s->location));
av_dict_copy(&options, s->chained_options, 0);
@@ -227,7 +244,10 @@ static int http_open(URLContext *h, const char *uri, int flags,
HTTPContext *s = h->priv_data;
int ret;
- h->is_streamed = 1;
+ if( s->seekable == 1 )
+ h->is_streamed = 0;
+ else
+ h->is_streamed = 1;
s->filesize = -1;
av_strlcpy(s->location, uri, sizeof(s->location));
@@ -291,6 +311,7 @@ static int process_line(URLContext *h, char *line, int line_count,
{
HTTPContext *s = h->priv_data;
char *tag, *p, *end;
+ char redirected_location[MAX_URL_SIZE];
/* end of header */
if (line[0] == '\0') {
@@ -330,7 +351,8 @@ static int process_line(URLContext *h, char *line, int line_count,
while (av_isspace(*p))
p++;
if (!av_strcasecmp(tag, "Location")) {
- av_strlcpy(s->location, p, sizeof(s->location));
+ ff_make_absolute_url(redirected_location, sizeof(redirected_location), s->location, p);
+ av_strlcpy(s->location, redirected_location, sizeof(s->location));
*new_location = 1;
} else if (!av_strcasecmp (tag, "Content-Length") && s->filesize == -1) {
s->filesize = strtoll(p, NULL, 10);
@@ -343,8 +365,9 @@ static int process_line(URLContext *h, char *line, int line_count,
if ((slash = strchr(p, '/')) && strlen(slash) > 0)
s->filesize = strtoll(slash+1, NULL, 10);
}
- h->is_streamed = 0; /* we _can_ in fact seek */
- } else if (!av_strcasecmp(tag, "Accept-Ranges") && !strncmp(p, "bytes", 5)) {
+ 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;
@@ -358,6 +381,34 @@ static int process_line(URLContext *h, char *line, int line_count,
} else if (!av_strcasecmp (tag, "Connection")) {
if (!strcmp(p, "close"))
s->willclose = 1;
+ } else if (!av_strcasecmp (tag, "Server") && !av_strcasecmp (p, "AkamaiGHost")) {
+ s->is_akamai = 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
@@ -388,6 +439,103 @@ static int process_line(URLContext *h, char *line, int line_count,
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(&param[5]);
+ } else if (!av_strncasecmp("domain=", param, 7)) {
+ av_free(cdomain);
+ cdomain = av_strdup(&param[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!) */
@@ -427,7 +575,7 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
{
HTTPContext *s = h->priv_data;
int post, err;
- char headers[1024] = "";
+ char headers[4096] = "";
char *authstr = NULL, *proxyauthstr = NULL;
int64_t off = s->off;
int len = 0;
@@ -452,12 +600,15 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
/* 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: ") && !post)
+ // 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);
@@ -477,6 +628,21 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
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)
@@ -510,6 +676,7 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
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;
@@ -549,6 +716,7 @@ static int http_buf_read(URLContext *h, uint8_t *buf, int size)
}
if (len > 0) {
s->off += len;
+ s->icy_data_read += len;
if (s->chunksize > 0)
s->chunksize -= len;
}
@@ -622,6 +790,32 @@ static int http_read(URLContext *h, uint8_t *buf, int size)
}
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);
@@ -688,7 +882,7 @@ static int http_close(URLContext *h)
}
if (s->hd)
- ffurl_close(s->hd);
+ ffurl_closep(&s->hd);
av_dict_free(&s->chained_options);
return ret;
}
@@ -776,7 +970,7 @@ static int http_proxy_close(URLContext *h)
{
HTTPContext *s = h->priv_data;
if (s->hd)
- ffurl_close(s->hd);
+ ffurl_closep(&s->hd);
return 0;
}
@@ -791,7 +985,10 @@ static int http_proxy_open(URLContext *h, const char *uri, int flags)
char *authstr;
int new_loc;
- h->is_streamed = 1;
+ 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);
@@ -847,8 +1044,7 @@ redo:
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;
+ ffurl_closep(&s->hd);
goto redo;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 03:41:31 +0000