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Id: 114538
Status: new
Priority: 0/
Queue: CGI-Simple

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Owner: Nobody in particular
Requestors: webmaster [...] topeg.de
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Subject: IIS didn't send EOF zo STDIN
Date: Sat, 21 May 2016 00:43:47 +0200
To: bug-CGI-Simple [...] rt.cpan.org
From: Tobias Grönhagen <webmaster [...] topeg.de>
Hello, the IIS didn't send a EOF to STDIN, therefore every read(...) hangs if it try to read beyond $ENV{CONTENT_LENGTH} bytes. Except for one place every call to internal_read will hang if $ENV{CONTENT_LENGTH} isn't a multiple of 4096. This is a specially a problem with the IIS. But there is no rule that dictates the web-service have to send a EOF over STDIN when the amount of $ENV{CONTENT_LENGTH} bytes is reached. So this can happen on any web-service. The only case that works are URL-Coded POST messages because $ENV{CONTENT_LENGTH} bytes are read. This is not easily corrected because at least 3 places need a rewrite. from something like that: while ( $got_data < $length ) { last READ unless _internal_read( $self, $handle, my $buffer ); $data .= $buffer; $got_data += length $buffer; to something like that: while ( $got_data < $length ) { my $len = 4096; $len = $length - $got_data if($length - $got_data < $len ); last READ unless _internal_read( $self, $handle, my $buffer, $len ); $data .= $buffer; $got_data += length $buffer;


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