how can I see exactly what headers are sent in an HTTP request

[Bennett Haselton]

[Sorry if this is coming through twice.  I unsubbed a while ago, forgot I 
had unsubbed, posted this question to the list, and got a message back 
saying it would be queued for moderator approval.  I don't know if the 
moderators approved this message when I first sent it to the list.  If 
anybody replied to the list, I didn't see it.]

How can I see *exactly* what HTTP headers are sent when I create a 
UserAgent object, a Request object, and make the request using the 
user-agent?

e.g. in this code:
>>>
use strict;
use LWP::UserAgent;
my $ua = new LWP::UserAgent;
$ua->agent("Netscape/4.75");
my $url = 'http://www.yahoo.com/';

my $req = HTTP::Request->new('GET', $url);
print "Request headers: " . $req->as_string . "\n";
my $res = $ua->request($req);
>>>
the $req->as_string part doesn't show the headers that will be sent with 
the request.  But then, how could it anyway, because there are some 
headers, like "User-Agent: Netscape/4.75", that would be due to properties 
I'd set on the UserAgent object, and the Request object would have no way 
of knowing about them.

From using a network sniffer, I know that when I run this code on my PC, 
the headers it sends out are:

GET / HTTP/1.1
TE: deflate,gzip;q=0.3
Connection: TE, close
Host: www.yahoo.com
User-Agent: Netscape/4.75
However, I know that when I run the script on a UNIX machine, the headers 
are different, because for some servers, I get different results if I run 
the perl script to fetch the URL, vs. telnetting to port 80 on the Web 
server and typing in the headers manually.

Therefore, I need a way to find out *exactly* what HTTP headers are being 
sent out by the perl script on the UNIX server when I run the perl script, 
and I don't have a network sniffer on that machine.  How can I do that?

	-Bennett

[EMAIL PROTECTED]     http://www.peacefire.org
(425) 497 9002
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