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Headers in fpassthru() output [message #176934]

Tue, 07 February 2012 02:40

DAVISM
Messages: 3
Registered: February 2012

Karma:

Junior Member

So far, I've tested a call to fopen followed by a call to fpassthru
on a remote (http://...) JPEG file with PHP v4.4.7 in the "OSU Web Server"
running under OpenVMS V8.3 on an Alpha, and with PHP v5.3.4 in Apache v2.2.17
running under Mac OS X v10.6.8. The JPEG file is served by a Webcam. The
documentation (on php.net) for "http://" says the stream opened by fopen only
provides access to the body of the response. Why is it, then, that when I
call on fpassthru for the (JPEG URL) stream, I see the headers included in the
data returned?

The code looks basically like this:

$image = fopen ( "http://...jpg", "r" );
foreach ( $http_response_header as $header )
{
echo "{$header}\r\n";
}
echo "\r\n";
fpassthru ( $image );
fclose ( $image );

With the above, the headers are clearly visible at the beginning of the data,
rendering a lot of meaningless code in the browser window, rather than an
actual image. One work-around I've developed is...

$image = fopen ( "http://...jpg", "r" );
$inHeaders = 1;
while ( $inHeaders && ! feof ( $image ) )
{
$line = fgets ( $image );
echo $line;
$inHeaders = ( $line != "\r\n" );
}
if ( ! feof ( $image ) )
fpassthru ( $image );
fclose ( $image );

Can anyone explain why I'm seeing behavior counter to the documentation with
"fopen ( 'http://...' )" and "fpassthru (...)"? (FWIW, the purpose of the
code is to "proxy" a Webcam image that isn't directly available, so that as
far as the browser is concerned, the image is served by the web server
hosting this PHP code.)

Thanks,
Mike

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[Message index]

		Headers in fpassthru() output By: DAVISM on Tue, 07 February 2012 02:40
		Re: Headers in fpassthru() output By: M. Strobel on Tue, 07 February 2012 08:48
		Re: Headers in fpassthru() output By: M. Strobel on Tue, 07 February 2012 08:56
		Re: Headers in fpassthru() output By: alvaro.NOSPAMTHANX on Tue, 07 February 2012 09:34
		Re: Headers in fpassthru() output By: DAVISM on Tue, 07 February 2012 16:36
		Re: Headers in fpassthru() output By: M. Strobel on Tue, 07 February 2012 16:50
		Re: Headers in fpassthru() output By: DAVISM on Tue, 07 February 2012 17:35
		Re: Headers in fpassthru() output By: M. Strobel on Wed, 08 February 2012 10:38
		Re: Headers in fpassthru() output By: alvaro.NOSPAMTHANX on Wed, 08 February 2012 09:10

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