HTTP::CheckProxy - Perl module for testing for open proxies

HTTP-CheckProxy documentation Contained in the HTTP-CheckProxy distribution.

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NAME

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HTTP::CheckProxy - Perl module for testing for open proxies

SYNOPSIS

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  use HTTP::CheckProxy

DESCRIPTION

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This module uses LWP to test the supplied IP address to see if it will promiscuosly proxy on port 80. Caution: this can have false alarms if you are on a network where you are supposed to go through a proxy, such as AOL -- but are you supposed to be running a webserver on such a network ?

If you feed this an invalid ip address, LWP will complain.

Note: while there is HTTP::ProxyCheck it is much slower, though it does a lot of input validation. HTTP::CheckProxy is intended to be useful in processing lots of candidate proxies and in recording useful information. To do this, make one object and repeatedly invoke the test() method with different IP addresses.

USAGE

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  my $open_proxy_test = HTTP::CheckProxy->new($ip);
  print "proxy test for $ip returns ".$open_proxy_test->code."\n";
  print ($open_proxy_test->guilty? "guilty" : "innocent");
  $open_proxy_test->test($ip2);
  print "proxy test for $ip2 returns ".$open_proxy_test->code."\n";
  print ($open_proxy_test->guilty? "guilty" : "innocent");

BUGS

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SUPPORT

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Email bugs to the author.

AUTHOR

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	Dana Hudes
	CPAN ID: DHUDES
	dhudes@hudes.org
	http://www.hudes.org

COPYRIGHT

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This program is free software licensed under the...

	The General Public License (GPL)
	Version 2, June 1991

The full text of the license can be found in the LICENSE file included with this module.

SEE ALSO

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perl(1).

METHODS

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new

 Usage     : HTTP::CheckProxy->new($ip);
 Purpose   : constructor
 Returns   : object instance
 Argument  : Optional first paramenter:
                name or ip address of candidate proxy. Do not include http:// .
             Optional second parameter: url (including the http://) to try to fetch. If this is invalid or unreachable the results of the test are meaningless, but this is NOT checked.
 Throws    : We should probably throw an exception if the ip address under test is unreachable
 Comments  :

See Also : HTTPD::ADS::AbuseNotify for sending complaints about validated proxies and other abuse.

get_proxy_port

 Usage     :  $open_proxy_test->get_proxy_port;
 Purpose   : tell which port successfully proxied 
 Returns   : 16-bit integer port number
 Argument  : none
 Throws    : nothing
 Comments  : only valid when  $open_proxy_test->guilty is TRUE , may be undef otherwise (or have incorrect info if you reused the object)! 
See Also   : HTTPD::ADS::AbuseNotify for sending complaints about validated proxies and other abuse.

test

 Usage     :  $open_proxy_test->test($ip)
 Purpose   : tries to fetch a known web page via the supplied ip as proxy.
 Returns   : true (proxy fetch successful) or false (it failed to fetch)
 Argument  : IPv4
 Throws    : We should probably throw an exception if the ip address under test is unreachable
 Comments  : Not all open proxies or compromised hosts listen on port 80 and their are other means              than straightforward HTTP to communicate with zombies but this is a start.

See Also : HTTPD::ADS::AbuseNotify for sending complaints about validated proxies and other abuse.

guilty

 Usage     : $open_proxy_test->guilty
 Purpose   : Is in fact the tested host guilty of being an open proxy?
 Returns   : true (its an open proxy) or false (it isn't)
 Argument  : none
 Throws    : nothing
 Comments  : This method checks the return status code of the test. If an error code is returned, esp. code 500, the host is not guilty. If the status code is success, the host is guilty.

 See Also   : HTTPD::ADS::AbuseNotify for sending complaints about validated proxies and other abuse.

code

 Usage     : $open_proxy_test->code
 Purpose   : Return the status code of the proxy test
 Returns   : HTTP status code
 Argument  : none
 Throws    : nothing
 Comments  : 

 See Also   : HTTPD::ADS::AbuseNotify for sending complaints about validated proxies and other abuse.
=cut
HTTP-CheckProxy documentation Contained in the HTTP-CheckProxy distribution. 
package HTTP::CheckProxy;
use strict;
use LWP::UserAgent;

BEGIN {
	use Exporter ();
	use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
	$VERSION     = 0.4;
	@ISA         = qw (Exporter);
	#Give a hoot don't pollute, do not export more than needed by default
	@EXPORT      = qw ();
	@EXPORT_OK   = qw ();
	%EXPORT_TAGS = ();
}


########################################### main pod documentation begin ##
# Below is the stub of documentation for your module. You better edit it!



############################################# main pod documentation end ##


my $target_url="http://www.hudes.org";

sub new
  {
    my ($class, $ip, $target) = @_;
    my $self = bless ({}, ref ($class) || $class);
    $target_url= $target if defined $target;
    $self->test($ip) if defined $ip;
    return ($self);
  }


{
  my $response;
  sub get_response {
    return $response;
  }
  sub _set_response {
    my ($self,$param) = @_;
    $response = $param || die "OpenProxyDetector - no response to store";
  }
}


{
 my $port;#the port the proxy answered on
 sub get_proxy_port {
   return $port;
 }
 sub _set_proxy_port {
   my ($self, $param) = @_;
   $port = $param || die "OpenProxyDetector - no port to store";
 }
}

################################################ subroutine header begin ##

################################################## subroutine header end ##

sub  test {
    my $self = shift;
    my $ip = shift ||  die "no ip address supplied to test";
    my @ports = qw/80 8080 8001 scx-proxy dproxy sdproxy funkproxy dpi-proxy proxy-gateway ace-proxy plgproxy csvr-proxy flamenco-proxy awg-proxy trnsprntproxy castorproxy ttlpriceprocy privoxy ezproxy ezproxy-2/;#1080 is SOCKS
    my $port;
    my $response;
    my $browser = LWP::UserAgent->new(
				      timeout =>10, max_size =>2048,
				      requests_redirectable => []
				     );#fixme -- come back later and stuff in a fake agent name
    foreach $port (@ports)
      {
	$browser->proxy("http","http://$ip:".$port);
	$response = $browser->head($target_url);
	last unless defined $response;
	if(! $response->is_error) {#keep going while we don't get a successful proxying
	  $self->_set_proxy_port($port);
	  last;
	}
      }
    $self->_set_response($response);
    return $response->code();
}



sub guilty {
    my $self = shift;
#we should get an error if its not an open proxy; informational etc. is not the right thing....
    return ! ( ($self->get_response)->is_error);
}


sub code {
    my $self = shift;
    return ($self->get_response)->code();
}

1; #this line is important and will help the module return a true value
__END__