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http: add hack to make streams served by MediaGateway not seekable

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These streams are reported as seekable, but all tests show they are not,
and the server merely pretends the streams are seekable. The server
responds with:

    content-range: bytes 0-1999999999/2000000000

Range requests seem to be correctly answered, but the actual data
returned at the same offset is different. Assume this is a bug in the
server software. The server identifies itself as:

    Server: MediaGateway 3.5.2-001

Add a hack that checks the server name, and disables seeking in this
case.

Test URL: http://8283.live.streamtheworld.com:80/CBC_R1_VCR_H_SC

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
wm4 2013-11-03 18:17:45 +01:00 • committed by Michael Niedermayer
parent 336a1902d6
commit 3220a894f7
1 changed files with 10 additions and 2 deletions
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12
libavformat/http.c
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@ -68,6 +68,7 @@ typedef struct {
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;
@ -386,8 +387,12 @@ 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, "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")) {
@ -570,6 +575,9 @@ static int http_read_header(URLContext *h, int *new_location)
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;
}