Re: Internal server error with fcgi when stdin is not read untill EOF is reached.

Can anybody explain what's wrong with fastcgi?

here's a very simple short example that shows this problem. Try to 
upload files with size about a 100KB a few times and you'll get internal 
server error.

http://block111.servehttp.com/main/fastcgi/error

ps. replace "fastcgi" with "cgi-bin" in the url to run the same binary 
as cgi-bin. The link for the C source code is included there.

thanks



pps wrote:
> Hi, I use fastcgi (mod_fastcgi-SNAP-0404142202-AP2.dll) with apache 
> 2.0.55 and I see a strange error.
> the result is internal server error.
> 
> 
> I code my apps in c++ and when I wrote file post code I wrote it in such 
> a way that if posted data size is bigger than the max allowed limit, 
> then only up to max data is read from stdin and the rest is discarded.
> 
> in this case I see a strange behavior.
> 
> here's a test case in more detail:
> I set max post size to 256KB.
> If I try to upload more than that everything is ok, but if I try to do 
> that again in the next request I get internal server error (sometimes I 
> need to repeat reposting large files a couple of times, and then each 
> request where stdin is not read until EOF generates this error). I also 
> tried to use fcgid and with it I get the same error but on the first 
> request.
> The same binary run as cgi-bin behaves without any problem. (By the way, 
> why not fastcgi lib automatically reopens stdin in binary mode?)
> 
> here's what I got in error.log:
> (OS 233)No process is on the other end of the pipe.  : FastCGI: comm 
> with server "..."aborted: WriteFile() failed
> FastCGI: incomplete headers (0 bytes) received from server
> 
> 
> if I simply add a line to skip data from stdin to the end then there's 
> no this error anymore:
> 
> while (fgetc(stdin) != EOF) ;
> 
> Is it something wrong with mod_fastcgi or do I have to read stdin until 
> EOF is reached or not to read from stdin at all?
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