proxy_check.php

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<?php
if( php_sapi_name() != 'cli' ) {
        die( 1 );
}

$output = '';

if ( ( isset( $_REQUEST ) && array_key_exists( 'argv', $_REQUEST ) ) || count( $argv ) < 4 ) {
        $output .= "Incorrect parameters\n";
} else {
        $ip = $argv[1];
        $port = $argv[2];
        $url = $argv[3];
        $host = trim(`hostname`);
        $output = "Connecting to $ip:$port, target $url, this hostname $host\n";

        # Open socket
        $sock = @fsockopen($ip, $port, $errno, $errstr, 5);
        if ($errno == 0 ) {
                $output .= "Connected\n";
                # Send payload
                $request = "GET $url HTTP/1.0\r\n";
#               $request .= "Proxy-Connection: Keep-Alive\r\n";
#               $request .= "Pragma: no-cache\r\n";
#               $request .= "Host: ".$url."\r\n";
#               $request .= "User-Agent: MediaWiki open proxy check\r\n";
                $request .= "\r\n";
                @fputs($sock, $request);
                $response = fgets($sock, 65536);
                $output .= $response;
                @fclose($sock);
        } else {
                $output .= "No connection\n";
        }
}

$output = escapeshellarg( $output );

#`echo $output >> /home/tstarling/open/proxy.log`;