diff --git a/Classes/Generator/Pdf.php b/Classes/Generator/Pdf.php
index 8048bdf..f0b80ce 100644
--- a/Classes/Generator/Pdf.php
+++ b/Classes/Generator/Pdf.php
@@ -14,6 +14,7 @@
  * The TYPO3 project - inspiring people to share!
  */
 
+use WebVision\WvPdfgen\Utility\UrlUtility;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Core\Utility\HttpUtility;
 use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
@@ -40,6 +41,11 @@ class Pdf
      */
     public $cObj;
 
+    /**
+     * @var UrlUtility
+     */
+    protected $urlUtility;
+
     /**
      * Userfunction for TYPO3. Which will generate the PDF for the current url
      * and take $conf into account.
@@ -55,9 +61,11 @@ class Pdf
      */
     public function main($content, array $conf)
     {
+        $this->urlUtility = GeneralUtility::makeInstance('TYPO3\CMS\Extbase\Object\ObjectManager')
+            ->get('WebVision\WvPdfgen\Utility\UrlUtility');
         $this->processConfiguration($conf);
 
-        if(!$this->pageAvailable()) {
+        if(!$this->urlUtility->urlAvailable($this->getUrlForGeneration())) {
             $GLOBALS['TSFE']->pageNotFoundAndExit();
         }
         $this->generatePdf();
@@ -110,46 +118,7 @@ protected function getFileName()
      */
     protected function getPdfUrl()
     {
-        return $this->getDomain() . str_replace(PATH_site, '', $this->getFileName());
-    }
-
-    protected function pageAvailable()
-    {
-        $responseHeader = array();
-        \TYPO3\CMS\Core\Utility\GeneralUtility::getUrl(
-            $this->getUrlForGeneration(),
-            2,
-            array(),
-            $responseHeader
-        );
-        return ($responseHeader['http_code'] === '200');
-    }
-
-    protected function filterUrl($urlToFilter)
-    {
-        $filteredUrl = '';
-        $parsedUrl = parse_url($urlToFilter);
-        if(!isset($parsedUrl['query'])) {
-            return $urlToFilter;
-        }
-
-        $filteredUrl = $parsedUrl['scheme'] . '://' . $parsedUrl['host'] . $parsedUrl['path'];
-        $urlQuery = array_filter(
-            explode('&', $parsedUrl['query']),
-            function ($queryParameter) {
-                list($parameterName) = explode('=', $queryParameter);
-                if(!in_array($parameterName, $this->configuration['parameterWhitelist'])) {
-                    return false;
-                }
-                return true;
-            }
-        );
-
-        if(count($urlQuery) > 0) {
-            $filteredUrl .= '?' . implode('&', $urlQuery);
-        }
-
-        return $filteredUrl;
+        return $this->urlUtility->getDomain() . str_replace(PATH_site, '', $this->getFileName());
     }
 
     /**
@@ -161,7 +130,10 @@ function ($queryParameter) {
      */
     protected function getUrlForGeneration()
     {
-        $urlToConvert = $this->filterUrl($this->getDomain() . $GLOBALS['TSFE']->siteScript);
+        $urlToConvert = $this->urlUtility->filterUrl(
+            $this->urlUtility->getDomain() . $GLOBALS['TSFE']->siteScript,
+            $this->configuration['parameterWhitelist']
+        );
 
         // Remove type parameter to generate the real url, not the PDF (= endless loop)
         $urlToConvert = str_ireplace('type=' . $this->configuration['typeNum'], '', $urlToConvert);
@@ -208,7 +180,7 @@ protected function processConfiguration(array $configuration)
             $this->configuration[$key] = $value;
 
             if($key === 'parameterWhitelist') {
-                $this->configuration[$key] = \TYPO3\CMS\Core\Utility\GeneralUtility::trimExplode(',', $value);
+                $this->configuration[$key] = GeneralUtility::trimExplode(',', $value);
             }
         }
 
@@ -232,14 +204,4 @@ protected function processConfiguration(array $configuration)
 
         return $this;
     }
-
-    /**
-     * Get the current active domain, with protocol.
-     *
-     * @return string
-     */
-    protected function getDomain()
-    {
-        return GeneralUtility::getIndpEnv('TYPO3_SITE_URL');
-    }
 }
diff --git a/Classes/Utility/UrlUtility.php b/Classes/Utility/UrlUtility.php
new file mode 100644
index 0000000..9211eec
--- /dev/null
+++ b/Classes/Utility/UrlUtility.php
@@ -0,0 +1,89 @@
+<?php
+namespace WebVision\WvPdfgen\Utility;
+
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Utility to ease work with urls.
+ *
+ * @author Daniel Siepmann <d.siepmann@web-vision.de>
+ */
+class UrlUtility
+{
+    /**
+     * Check whether the given URL is available (=returns 200).
+     *
+     * @param string $urlToCheck
+     *
+     * @return bool
+     */
+    public function urlAvailable($urlToCheck)
+    {
+        $responseHeader = array();
+        GeneralUtility::getUrl(
+            $urlToCheck,
+            2,
+            array(),
+            $responseHeader
+        );
+        return ($responseHeader['http_code'] === '200');
+    }
+
+    /**
+     * Remove all parameter from query, except if they are white listed.
+     *
+     * @param string $urlToFilter The url to filter.
+     * @param array $parameterWhitelist The list of parameter which are white listed.
+     *
+     * @return string
+     */
+    public function filterUrl($urlToFilter, array $parameterWhitelist)
+    {
+        $filteredUrl = '';
+        $parsedUrl = parse_url($urlToFilter);
+        if(!isset($parsedUrl['query'])) {
+            return $urlToFilter;
+        }
+
+        $filteredUrl = $parsedUrl['scheme'] . '://' . $parsedUrl['host'] . $parsedUrl['path'];
+        $urlQuery = array_filter(
+            explode('&', $parsedUrl['query']),
+            function ($queryParameter) {
+                list($parameterName) = explode('=', $queryParameter);
+                if(!in_array($parameterName, $parameterWhitelist)) {
+                    return false;
+                }
+                return true;
+            }
+        );
+
+        if(count($urlQuery) > 0) {
+            $filteredUrl .= '?' . implode('&', $urlQuery);
+        }
+
+        return $filteredUrl;
+    }
+
+    /**
+     * Get the current active domain, with protocol.
+     *
+     * @return string
+     */
+    public function getDomain()
+    {
+        return GeneralUtility::getIndpEnv('TYPO3_SITE_URL');
+    }
+}