Hi

I attempt to download large files (~20MB+ zip, pdf) from a website (collabnet teamforge) which is using https protocol. I wrote a perl script using WWW::Mechanize and tried to save the file using 'save_content' function like below.

#initialise browser object
    $browser = WWW::Mechanize->new(autocheck =>1, noproxy =>1);
    # Add cookie jar
    $browser->cookie_jar(HTTP::Cookies->new());
    $browser->agent_alias('Linux Mozilla');

....

$browser->get($collabnetArtifactURL);

    #Serach and follow the file / doc link in collabnet
        
    $tmpURL = $browser->find_link(tag=>'a',url_regex => qr/\/sf\/(docm
+an|frs)\/do\/(downloadDocument|downloadFile)\/.*\/$artID/)->url_abs()
+;
    
    $tmpURL.='/'.$collabnetFileVersion if ($collabnetFileVersion ne ''
+);
    
    print "\n INFO: URL: $tmpURL";
    #print "\n ", Dumper($response) , "\n";
    
    $response = $browser->get($tmpURL);
        
    if ($browser->success()) 
    {
        if ($collabnetFileName eq '')
        {
            $collabnetFileName = $response->filename() || $artID;
        }
         
        $browser->save_content($collabnetFileName);
        
        if (-s $collabnetFileName)
        { 
            print "\n INFO: $collabnetFileName is downloaded";
        }
        else
        {
            print "\n ERROR:  $collabnetFileName is NOT downloaded";
        }
    }
....
[download]

This is just a code snip set only not running code.

This code works find in Linux machine with perl 5.8.8 but failes to download files properly in Windows OS. I tried to decode_content and realise that only first chunk of data came and immediately client (perl script) sends x-die header. That means, In windows Active perl 5.12.x , downloading large binary files via https is not working.

The underlying problem was , perl lwp can not deflate the gzip data because , lwp dies before getting all the chunk of the big file. I searched a lot in google but did not find right solution. Because this appears to be Windows only problem.

Finally i made it working with using Crypt::SSLeay . By default in windows OS, LWP uses IO::Socket::SSL to handle https. which is not working for me. So i had to force LWP to use Net::SSL (provided by Crypt::SSLeay) using following code

use strict;
use warnings;
use Crypt::SSLeay;
use Net::SSL;
use WWW::Mechanize;
use HTTP::Cookies;

....

$ENV{PERL_NET_HTTPS_SSL_SOCKET_CLASS} = "Net::SSL";
$ENV{PERL_LWP_SSL_VERIFY_HOSTNAME} = 0;

...
# Same above code
[download]

That is it. Everything works fine after I added above code.