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Re: Bug#569191: libwww-perl: GET behavior changed in squeeze: URL stopped working

[debian-www, please CC the bugreport on replies; thanks]

-=| Andreas B. Mundt, Wed, Feb 10, 2010 at 06:16:03PM +0100 |=-
> Package: libwww-perl
> Version: 5.834-1
> Severity: important
> we use GET to download a wikipage and further process the data to
> prepare the manual of Debian Edu. The command:
> 	GET "http://wiki.debian.org/DebianEdu/Documentation/Lenny/AllInOne?action=raw";
> works fine in Lenny, but stopped working in squeeze where "You are not
> allowed to access this!" is returned. If you remove "?action=raw" from
> the URL anything is fine. Is this inteded and we have to provide a
> header?

This is very strange. There is a slight difference in the User-Agent 
request header (as reported by tcpdump -s 1500 -X):

On Lenny (works)
User-Agent: lwp-request/0.810

On Sid (breaks)
User-Agent: lwp-request/5.834 libwww-perl/5.834

So it seems there is some filter on wiki.debian.org that refuses some 
user agents.

HTTP/1.1 (section 14.43) explicitly allows multiple entries in this 

    The field can contain multiple product tokens (section 3.8) and 
    comments identifying the agent and any subproducts which form 
    a significant part of the user agent

Cc-ing debian-www for comment.

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