Fellow monks,

I'm asking for your advice.

My company proxy likes to break HTTP protocol and insists repeatedly to deploy full content instead of content-ranged, as requested.

Up to now, everything OK, the problem comes when its time to yum install anything.

Yum asks for package headers using content-range to a server that support that and proxy returns full. Expect a header and receive a full rpm. Result is wrong checksum, no deal.

Having some experience with HTTP::Proxy, I am thinking of writing a BodyFilter to throw away content out of the range. Do you, dear monks, think is wise to use HTTP::Proxy to do this? Is there any other tool capable of doing this?

Sample, untested, non functional code follows

The new Proxy Class 
{package HTTP::Proxy::ContentRange;

use base HTTP::Proxy;
use HTTP::Proxy::HeaderFilter::contentrange;
use HTTP::Proxy::BodyFilter::complete;
use HTTP::Proxy::BodyFilter::contentRange;
use strict;

sub new {
    my $class = shift;

    my $self = SUPER::new(@_);
    
    # Whe depend on HPB::complete.
    $self->push_filter(
        response => HTTP::Proxy::HeaderFilter::contentrange->new,
        response => HTTP::Proxy::BodyFilter::complete->new,
        response => HTTP::Proxy::BodyFilter::contentRange->new);
    
    return $self;
}

[download]
The Header Filter: 
{package HTTP::Proxy::HeaderFilter::contentrange;

use HTTP::Proxy;
use base HTTP::Proxy::HeaderFilter;
use strict;

sub filter(){
    my ( $self, $headers, $message) = @_;

    if (
        $message->isa('HTTP::Response') and
        $message->code == 200 and
        $range = $message->request->header('Content-Range')
    ){
        #Let's fix that nasty behaviour! ;-)
        $message->code(206);
        $message->header('Content-Range' => $range);

        #XXX: Find a way to calc content-lenght
        $message->remove_header('Content-Length');

        #Mark this for body processing!
        $self->SUPER::proxy->stash($message->uri => 1);
    }

}
1;

}

[download]
The Body Filter: 
{package HTTP::Proxy::BodyFilter::contentRange;

use HTTP::Proxy;
use base HTTP::Proxy::BodyFilter;
use strict;


use base HTTP::Proxy::BodyFilter;

}

sub filter{
    my ($self, $dataref, $message, $protocol, $buffer) = @_;

    #Was this response marked for processing?
    if ( SUPER::proxy->stash($message->uri) == 1 ){

        ######
        # TO IMPLEMENT
        # Parse Content-Range and select data to send.
        ######

        #XXX:  Wouldn't be wise to save content to a temp file and avo
+id
        # filling up memory. Maybe use HPB::save?

       #Delete entry from process table
       delete SUPER->proxy->stash{$message->uri};
    }
}

1;
}

[download]
Thank you in advance for any commentary.

In reply to Is wise to use HTTP::Proxy to enforce correct Content-Range responses? by motobói

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