com.xaymar.www/redirect.php

<?php

// SQL Information and Related
$SQL = array();
$SQL['Host']		= "database.svc.xaymar.com";
$SQL['Database']	= "com.xaymar.www";
$SQL['Username']	= "com.xaymar.www";
$SQL['Password']	= "G_5R_ZXm6Uek9DEt";
$SQL['Persistent']	= true; // Persistent database connection. (Recommended)

{ // MySQL Database Connection
	// Try and connect to the database (otherwise die).
	ini_set("mysqli.allow_persistent", $SQL['Persistent']);
	mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
	$SQL['Handle']		= new mysqli($SQL['Host'], $SQL['Username'], $SQL['Password'], $SQL['Database']);
	if ($SQL['Handle']->connect_errno) {
		header("500 Internal Server Error");
		die($SQL['Handle']->connect_errno." ".$SQL['Handle']->connect_error);
	}
}

{ // Prepare a few statements.
	$STATEMENTS = array();
	$STATEMENTS["LookUp"] = <<<STR
SELECT `target`
FROM `redirects`
WHERE
	(`disabled` = false)
	AND (`path` = ?)
ORDER BY
	`date_created` DESC
STR;
	$STATEMENTS["Insert"] = <<<STR
INSERT INTO `redirects`
SET
	`path` = ?
STR;
$STATEMENTS["Increment"] = <<<STR
UPDATE `redirects`
SET
	`uses` = `uses` + 1
WHERE
	(`disabled` = false)
	AND (`path` = ?)
STR;

	// Convert text into actual prepared statements.
	foreach($STATEMENTS as $k => $v) {
		$STATEMENTS[$k] = $SQL['Handle']->prepare($v);
	}
}

function insert_lookup($url) {
	global $STATEMENTS;
	global $SQL;

	$STATEMENTS['Insert']->bind_param('s', $url);
	if (!$STATEMENTS['Insert']->execute()) {
		throw new Exception($SQL['Handle']->errno." ".$SQL['Handle']->error);
	} else if (!$STATEMENTS['Insert']->get_result()) {
		throw new Exception($SQL['Handle']->errno." ".$SQL['Handle']->error);
	}
}

function increment_lookup($url) {
	global $STATEMENTS;
	global $SQL;

	$STATEMENTS['Increment']->bind_param('s', $url);
	if (!$STATEMENTS['Increment']->execute()) {
		throw new Exception($SQL['Handle']->errno." ".$SQL['Handle']->error);
	}
}

function redirect_lookup($url) {
	global $STATEMENTS;
	global $SQL;

	$STATEMENTS['LookUp']->bind_param('s', $url);
	if (!$STATEMENTS['LookUp']->execute()) {
		throw new Exception("".$SQL['Handle']->errno." ".$SQL['Handle']->error);
	}

	$output = null;
	$res = $STATEMENTS['LookUp']->get_result();
	if ($res->num_rows == 0) {
		insert_lookup($url);
	} else {
		while($obj = $res->fetch_object()) {
			if ($obj->target != null) {
				$output = $obj->target;
				increment_lookup($url);
				break;
			}
		}
	}

	$res->close();
	return $output;
}

try { // Try and redirect user according to the full provided URI
	$url = urldecode($_SERVER['REQUEST_URI']);
	$url_parts = parse_url($url);

	$location = null;
	// Try and identify a redirect by the full URI.
	$location = redirect_lookup($url);
	if ($location == null) {
		// Try and identify a redirect by the path.
		$location = redirect_lookup($url_parts["path"]);
	}
	if ($location != null) {
		header("Location: ".$location, true, 307);
	} else {
		header("Location: https://www.xaymar.com/404.html");
	}

	// In all other cases, just redirect to 404.
	header("Location: https://www.xaymar.com/404.html");
} catch(Exception $e) {
	//header("Service Unavailable", true, 503);
	header("Retry-After: 30", true, 503);
	echo($e);
}

//die();