pixel.png

<?php
if (!isset($_GET['e'])) {
	header('Content-Type: image/png');
	readfile('frown.png');
	exit();
}

require_once dirname(__FILE__) . '/_classes/_include.php';

$decoder = new Encryption('iHateMonkeys');
$encoder = new Encryption('iLoveMonkeys'); // encoder for cancelation link
$resubEnc = new Encryption('iFuckMonkeys');

$email = $decoder->decrypt($_GET['e']);
$emailList = new EmailList(dirname(__FILE__) . '/_secret/blocked_emails.dat');

if (!$emailList->containsEmail($email)) {
	$referrer = $_SERVER['HTTP_REFERER'];
	$userAgent = $_SERVER['HTTP_USER_AGENT'];
	$ipAddress = $_SERVER['REMOTE_ADDR'];
	$hostName = $_SERVER['REMOTE_HOST'];
	if (empty($hostName) || !isset($_SERVER['REMOTE ADDR'])) {
		$hostName = @gethostbyaddr($ipAddress);
	}
	$urlAddr = $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
	
	$encE = $encoder->encrypt($email);
	$encE1 = $resubEnc->encrypt($email);
	$unsubAddr = $_SERVER['HTTP_HOST'] . dirname($_SERVER['REQUEST_URI']) . '/pixel.blocker.php?e=' . urlencode($encE);
	$resubAddr = $_SERVER['HTTP_HOST'] . dirname($_SERVER['REQUEST_URI']) . '/pixel.unblocker.php?e=' . urlencode($encE1);
	$msg = sprintf("Someone has viewed your custom image from %s\n\n" .
			"IP: %s\nHostname: %s\nUserAgent: %s\nReferrer: %s\n\n" .
			"If you did not subscribe to get these messages, you can cancel email " .
			"notifications by visiting the URL: %s\n" . 
			"You can also re-subscribe to these messages here: %s\n\n" . 
			"\nThank you,\nPixel Tracker team",
			$urlAddr, $ipAddress, $hostName, $userAgent, $referrer, $unsubAddr, $resubAddr
	);
	$headers =  'From: noreply@nodomain.com' . "\r\n" . 
				'Reply-To: noreply@nodomain.com' . "\r\n" . 
				'Message-id: PixelMagic' . "\r\n" . 
				'X-Mailer: PixelMagic';
	
	mail($email, 'Hit from Pixel Tracker', $msg, $headers);
	// echo 'Sent message to ' . $email;
} else {
	// echo 'Sucker is blacklisted.';
	// TODO: note this in the log.
}

$emailList->closeFile();
header('Content-Type: image/png');
readfile('pixel.secret.png.txt');

?>