On Wed, 17 Feb 2010, Tiberiu Motoc wrote:
From all systems where i deployed my curl based app, there is one which
returns "empty reply from server" curl(52). I did find one other thread on
this newsgroup which was describing the same problem:
http://curl.haxx.se/mail/archive-2005-01/0129.html.
I wouldn't be so sure that you have the same problem, but perhaps it is.
The guy was able to solve it by writing a curlrc in his home directory with
comtents User-Agent: curl. What does that solve? What does it do?
It modifies the User-Agent: field in curl's requests to that fixed string.
I dont bage access to that system so it is difficult for me to
investigate.
Setting the agent with CURLOPT_USERAGENT is what he did.
And no, there's no explanation, sensible or crazy, that explains why setting
the user-agent to that was a good idea for him.
In your case, as I believe you're using libcurl and not curl, it might make
sense in the way that without an explictit user-agent libcurl sends none and
perhaps there's a transparent proxy or something similarly stupid in the way
in this particular instance that requires such a field for it to be considered
a valid and fine request.
I'm speculating wildly.
--
/ daniel.haxx.se
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