libxml_set_streams_context

[Bill Hoffman <xbhoff@xxxxxxx>]

I'm trying to use libxml_set_streams_context() to load a remote xml  
file via HTTP conditional GET with DOMDocument::load() by stuffing an  
'If-Modified-Since: --- " HTTP header into the stream, but no matter  
how I try it I always get an HTTP 200 response when I know the last- 
modified date is well before my if-modified date string.

I've confirmed via curl -H on the command line that I can do it  
properly and get an HTTP 304 as expected, but I don't know what I'm  
not doing right with libxml_set_streams_context(). Here's my code:

$opts = array('http'=>array('method'=>"GET", 'header'=>"If-Modified- 
Since: Wed, 18 May 2005 23:55:29 GMT\r\n"));
$context = stream_context_create($opts);
libxml_set_streams_context($context);
$doc->load('http://www.somewhere.com/somefile.xml');
echo $doc->saveXML();

using the same $context resource, this also produces the same result,  
when I expect it should work.

file_get_contents('http://www.somewhere.com/somefile.xml', false,  
$context);

I have php 5.0.4 compiled with libxml2 (2.6.16) on Mac OS X 10.4. I  
imagine I'm not doing something correctly, but can't figure out what  
it is.

Any help?

--
Bill Hoffman
xbhoff@xxxxxxx

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