[users@httpd] Apache 2.0.54 creating =?utf-8,iso-8859-1?q?=22Bad=20request=22?= on POST over 8kb

["Tuomas J Rinta" <trinta@xxxxxxxxxxxxxx>]

Running Apache 2.0.54 on Debian Linux. 

A while ago I posted a message here asking about "request failed: error 
reading the headers" which was caused by Apache being unable to read 
POST-requests that were large. I suspected that this was Not My Fault(tm) as 
it was mostly with the users using a specific ISP. Now I did some more 
checking and it seems that the requests are coming to the server all right, 
it's Apache that's freaking out. It took me a while to pinpoint the problem 
as some requests worked, some didn't until I wrote a small app that does 
POST requests to my server and logs the response codes. I realized that when 
the size of the POST request reached ~8kb, Apache would respond with a "400: 
Bad request". The problem though was that when doing a large POST request 
with my browser, everything worked fine. 

This was because my app wasn't sending a Content-Length-header and my 
browser was. Apparently Apache can't handle the POST request if it is ~8kb 
or over AND it doesn't have the Content-Length-header set. 

The problem is that some proxy servers (apparently being used by the ISP), 
remove this header -> *problems*. 

Is there anything I can do, and is there a specific reason why Apache does 
this? 

Best regards,
Tuomas Rinta

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