Re: [Modcplusplus-user] time out during post requests

[<jo...@st...>]

very interesting - 

the content length looks correct.....  but the browser hangs?  I'll try to 
reproduce this.

sterling

On 15 Apr 2002, Nathan Stitt wrote:

> Greetings all,
> 
> I had emailed John about this earlier, but am posting here to recap what
> I've figured out thus far.
> 
> Whenever a HTTP POST request is made to a cpp module, apache immediatly
> returns whatever output the module provides but then inexplicably (so
> far) doesn't close the connection, leading to an around 10 second
> timeout before apache (or browser, unsure which) gives up on waiting,
> and closes the tcp connection.
> 
> This only seems to occur with browsers that attempt a keep alive
> connection during posts.  Both Mozilla and IE versions > 4 do this,
> however Netscape 4.x does not.
> 
> Here's a sniffed request that works:
> 
> POST /cpp-handler HTTP/1.1
> User-Agent: curl/7.9.2 (i686-pc-linux-gnu) libcurl 7.9.2 (OpenSSL
> 0.9.6b)
> Host: nas.office.allmed.net
> Pragma: no-cache
> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
> Content-Length: 17
> Content-Type: application/x-www-form-urlencoded
> 
> test1=sa&test2=32
> 
> 
> And one that does not:
> 
> 
> POST /cpp-handler HTTP/1.1
> Host: nas.office.allmed.net
> Accept: */*
> Accept-Language: en
> Pragma: no-cache
> Connection: Keep-Alive
> Referer: http://nas.office.allmed.net/test.html
> User-Agent: Mozilla/4.0 (compatible; MSIE 5.12; Mac_PowerPC)
> UA-OS: MacOS
> UA-CPU: PPC
> Content-type: application/x-www-form-urlencoded
> Extension: Security/Remote-Passphrase
> Content-length: 17
> 
> test1=sa&test2=32
> 
> 
> As you can see, the content-length and content is the same for both
> requests, they are both HTTP/1.1,  however the failing request has the
> Connection: Keep-Alive header.
> 
> >From what I've been able to figure out by crude ap_log statements in the
> mod_cpp source, the request does get through mod_cpp just fine, and
> control passes back to apache before the time-out occures.  gdb is
> useless with the multithreaded nature of apache2, and segfaults before
> even getting it running.
> 
> The problem to me seems to lie in mod_cpp, as normal cgi's work fine. 
> Therefore  perhaps there is something that mod_cpp should perform for
> post requests that it's not?
> 
> I've confirmed that turning off keep alives off in httpd.conf, makes the
> problem go away.
> 
> Does anyone else see this behaviour or is it only myself?
> 
> Nathan
> 
> 
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