CONNECT with Content-Length hangs the proxy [rt.cpan.org #76988]

Migrated from rt.cpan.org#76988 (status was 'new')

Requestors:

• vbuttazzo@yahoo.com

From vbuttazzo@yahoo.com on 2012-05-04 13:45:17
:

If a client sends a CONNECT to HTTP::Proxy that includes a Content-
Length header then the result is a hang of the proxy.

It's obviously not a normal condition, but it happened on my 
configuration using PHP with cURL and the Google Api library. This 
library explicitly sets a Content-Length header for a POST request and 
cURL sends it in the CONNECT request to the proxy. I think it's a cURL 
wrong behavior, but it was much more easier to fix on the proxy side.

The solution was simply to add this line:

    $len = $ct = $te = undef if $method eq "CONNECT";

after this code:

    my $te  = $r->header('Transfer-Encoding');
    my $ct  = $r->header('Content-Type');
    my $len = $r->header('Content-Length');

This way wrong headers are pretty ignored.

I don't know if anyone else will ever have the same problem, I think 
it's not a common situation, anyway I like to report it.

Locate the HTTP::Proxy request-handling code containing the Transfer-Encoding, Content-Type, and Content-Length header extraction. First reproduce a CONNECT request with Content-Length, then verify that the proxy no longer hangs and that the CONNECT request's body-related headers are ignored.