==== Net Programming, TCP/IP ====

==Technical requirenments ==
^What ^Where^
|Sending HTTP Requests by telnet requres a good telnet client | Install [[http://cygwin.com/install.html|Cygwin]] and add the **inetutils** package to it (includes telnet)  |
|Add the HackBar Firefox extension which allow sending POST Requests| [[https://addons.mozilla.org/en-US/firefox/addon/hackbar/|HackBar Firefox extension]] |


==Knowledge==
|< 100% 30% - >|
^What ^Where^
|1. Introduction into sending HTTP Requests manually, by telnet.|[[http://blog.alagad.com/2004/11/03/tutorial-on-sending-manual-http-requests/|Tutorial here.]]|
|2. Use Sockets to send HTTP Requests with Perl |In detail it is described [[http://www.tutorialspoint.com/perl/perl_socket.htm|here]], and in short:<sxh perl>use IO::Socket;
my $sock = new IO::Socket::INET (
                                 PeerAddr => 'www.example.org',
                                 PeerPort => '80',
                                 Proto => 'tcp',
                                );
die "Could not create socket: $!\n" unless $sock;
print $sock "GET /index.html HTTP/1.0\r\n";
print $sock "Host: www.example.org\r\n";
print $sock "Cookie: test=quest\r\n\r\n";
print while <$sock>;
close($sock);</sxh> |