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	diff --git a/src/Service.php b/src/Service.php
	index a572340..faea18f 100644
	--- a/src/Service.php
	+++ b/src/Service.php
	@@ -1,106 +1,108 @@
	<?php

	namespace Nasqueron\SAAS;

	abstract class Service {

	///
	/// Request methods
	///

	public function handleNotExistingSite() : Service {
	if (!$this->isExisting()) {
	$this->serveNotExistingResponse();
	}

	return $this;
	}

	/**
	* @throws SaasException where the URI can't be found
	*/
	public function handleAliveRequest() : Service {
	// Handles /status requests
	if (self::isAliveRequest()) {
	$this->serveAliveResponse();
	}

	return $this;
	}

	public abstract function run();

	///
	/// Default implementation
	///

	public function isExisting () : bool {
	return true;
	}

	public function serveAliveResponse() : void {
	die("ALIVE");
	}

	public function serveNotExistingResponse(): void {
	header("HTTP/1.0 404 Not Found");
	die("This site doesn't exist.");
	}

	///
	/// Helper methods
	///

	public static function getServerHost() : string {
	if (isset($_SERVER['HTTP_HOST'])) {
	return self::extractHost($_SERVER['HTTP_HOST']);
	}

	return "";
	}

	/**
	* Extracts host from a host:port expression
	*
	* @param string $expression The host:port expression, e.g. acme.domain.tld:5000
	* @return string The host expression without the port, e.g. acme.domain.tld
	*/
	private static function extractHost (string $expression) : string {
	$position = strpos($expression, ':');

	if ($position === false) {
	return $expression;
	}

	return substr ($expression, 0, $position);
	}

	/**
	* @throws SaasException when no URL server parameter have been found.
	*/
	public static function getUri() : string {
	$sources = [
	'DOCUMENT_URI',
	'REQUEST_URI',
	];

	foreach ($sources as $source) {
	if (isset($_SERVER[$source])) {
	return $_SERVER[$source];
	}
	}

	throw new SaasException("Can't get URI.");
	}

	/**
	* @throws SaasException where the URI can't be found
	*/
	private static function isAliveRequest() : bool {
	return
	+ array_key_exists('REQUEST_METHOD', $_SERVER)
	+ &&
	($_SERVER['REQUEST_METHOD'] === 'GET' \|\| $_SERVER['REQUEST_METHOD'] === 'HEAD')
	&&
	static::getUri() === '/status';
	}

	}

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