Qt-interest Archive, March 2008
QHostInfo and QHttp can't find host
Message 1 in thread
Hi,
I am having some trouble using the network from Qt 4.4 beta 1.
I am trying to retreive a webpage using QHttp. However, I get a "Host
bla.blah.com not found" error. Checking with QHostInfo yields the same
results.
The interesting thing is that a normal webbrowser *is* able to retreive the
page without problems.
Does anyone have any suggestions what the problem may be?
Regards,
André
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Message 2 in thread
"André Somers" <andre@xxxxxxxxxxxxxxxx> wrote in message
news:fr3cgb$s24$1@xxxxxxxxxxxxxxxx
> Hi,
>
> I am having some trouble using the network from Qt 4.4 beta 1.
> I am trying to retreive a webpage using QHttp. However, I get a "Host
> bla.blah.com not found" error. Checking with QHostInfo yields the same
> results.
>
> The interesting thing is that a normal webbrowser *is* able to retreive
> the page without problems.
>
> Does anyone have any suggestions what the problem may be?
I solved the issue myself. It was a stupid matter of erroneously including
the protocol (http://) in the hostname. That of course does not work.
While the host now seems to be reached, I still have a problem: there does
not seem be any data to read! While the webpage displays nicely in FireFox,
I get no available data after the requestReady() signal is fired.
QHttp::availableData() returns 0. QHttp::lastResponse().statusCode() returns
200, indicating a successfull HTTP request.
Looking out the state change output during the run, it seems that most time
is spend in state 3.
Any hints?
André
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Message 3 in thread
> While the host now seems to be reached, I still have a problem: there does
> not seem be any data to read! While the webpage displays nicely in
> FireFox, I get no available data after the requestReady() signal is fired.
> QHttp::availableData() returns 0. QHttp::lastResponse().statusCode()
> returns 200, indicating a successfull HTTP request.
> Looking out the state change output during the run, it seems that most
> time is spend in state 3.
At the risk of seemingly talking to myself:
I have found the problem. The problem was at the webserver, who simply did
not send any data if the user-agent string was set to something it did not
think was valid. Using the request header to set a bogus user agent string
solved the problem.
Thanks.
André
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Message 4 in thread
André Somers wrote:
>> While the host now seems to be reached, I still have a problem: there
>> does not seem be any data to read! While the webpage displays nicely
>> in FireFox, I get no available data after the requestReady() signal
>> is fired. QHttp::availableData() returns 0.
>> QHttp::lastResponse().statusCode() returns 200, indicating a
>> successfull HTTP request.
>> Looking out the state change output during the run, it seems that
>> most time is spend in state 3.
>
> At the risk of seemingly talking to myself:
> I have found the problem. The problem was at the webserver, who simply
> did not send any data if the user-agent string was set to something it
> did not think was valid. Using the request header to set a bogus user
> agent string solved the problem.
In the interest of, you know, keeping choice alive, I'd recommend
pinging the server's admin to reconfigure the "valid" user-agent strings...
--Jeff
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