[development] Redirection issue with drupal_http_request

[Arancaytar Ilyaran]

On 08/14/2010 08:39 PM, nitin gupta wrote:
> Hi,
> 
> I recently came across this issue when drupal_http_request reported error
> (-1002 - missing schema) for the following URL:
> 
> http://feedproxy.google.com/~r/variety/news/film/~3/ksODaiUYe-U/VR1118022938
> 
> This URL redirects twice. For the first time, it returns the location:
> http://www.variety.com/article/VR1118022938?categoryid=3762&cs=1&nid=2564&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+variety%2Fnews%2Ffilm+%28Variety+-+Film+News%29
> 
> with 302 code.
> 
> This URL when requested returns the Location:
> /article/VR1118022938.html?categoryid=3762&cs=1&nid=2564&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+variety%2Fnews%2Ffilm+%28Variety+-+Film+News%29
> 
> 
> with 302 code.
> 
> As the drupal_http_request requests the location, a missing schema error is
> reported. Whereas the browser, and the following test site:
> http://www.rexswain.com/cgi-bin/httpview.cgi, correctly returns the content
> of the page.
> 
> Is drupal_http_request missing some recommended functionality?
> 
> --
> Regards,
> Nitin Kumar Gupta
> http://publicmind.in/blog/
> 


drupal_http_request is not missing any standard functionality; it
expects the location field to contain an absolute URI and that is what
the standard specifies. However, this is a frequently encountered quirk,
and a workaround might do some good there.

From the HTTP/1.1 RFC:

Location: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.30

The Location response-header field is used to redirect the recipient to
a location other than the Request-URI for completion of the request or
identification of a new resource. [...] *The field value consists of a
single absolute URI.*

       Location       = "Location" ":" absoluteURI
An example is:
       Location: http://www.w3.org/pub/WWW/People.html

-- 
Arancaytar
XMPP: arancaytar.ilyaran at gmail.com / ICQ: 282026638 / AIM: arancaytar42

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