Serve files using a CDN Hosts address

Author: Matthias Lill

Config/bootstrap.php

@@ -7,9 +7,10 @@
  *
  */
 Configure::write(
-    'DatabaseBlobFile',
-    array(
-        'sizes' => array(
+	'DatabaseBlobFile',
+	array(
+		'cdn_host' => '',
+		'sizes' => array(
 			'md1' => array('resizewidth',67),
 			'md2' => array('resizewidth',165),
 			'md3' => array('resizewidth',263),
@@ -23,5 +24,5 @@
 			'md11' => array('resizewidth',1043),
 			'md12' => array('resizewidth',1170),
 		),
-    )
+	)
 );

Model/Behavior/BlobFileBehavior.php

@@ -22,8 +22,9 @@ public function beforeFind(Model $model, $query) {
 
 		foreach ($columns as $field => $type) {
 			if ($type == 'binary') {
+				$cdnHost = Configure::read('DatabaseBlobFile.cdn_host');
 				$model->virtualFields[$field] = 'LENGTH('.$model->name.'.'.$field.')';
-				$model->virtualFields[$field.'_basepath'] = "CONCAT('/file/','".$model->name."','/',".$model->name.'.'.$model->primaryKey.",'/','".$field."','/', date_format(".$model->name.".modified,'%y%m%d%h%i'))";
+				$model->virtualFields[$field.'_basepath'] = "CONCAT('".$cdnHost."/file/','".$model->name."','/',".$model->name.'.'.$model->primaryKey.",'/','".$field."','/', date_format(".$model->name.".modified,'%y%m%d%h%i'))";
 			}
 		}
 		return $query;

readme.md

@@ -85,6 +85,10 @@ resize to max width and height, then crop to center
 
 Every file which has been served once will be stored inside the webroot for caching with a timestamp. This is supposed to work with a deployment processes which resets the app folder to its correct state with every deployment.
 
+### Cache using CDN
+
+You can set a CDN host address inside your config file. This will reduce request to your server and files stored inside your webroot.
+
 ## Roadmap
 
 - Support for more file types than just images