new: Added a way to disable cached exports server wide for low disk space instnaces

- But please consider just adding some more space instead..

app/Controller/EventsController.php

@@ -1649,7 +1649,7 @@ class EventsController extends AppController {
 		$filesize_units = array('B', 'KB', 'MB', 'GB', 'TB');
 		if ($this->_isSiteAdmin()) $this->Session->setFlash('Warning, you are logged in as a site admin, any export that you generate will contain the FULL UNRESTRICTED data-set. If you would like to generate an export for your own organisation, please log in with a different user.');
 		// Check if the background jobs are enabled - if not, fall back to old export page.
-		if (Configure::read('MISP.background_jobs')) {
+		if (Configure::read('MISP.background_jobs') && !Configure::read('MISP.disable_cached_exports')) {
 			$now = time();
 
 			// as a site admin we'll use the ADMIN identifier, not to overwrite the cached files of our own org with a file that includes too much data.
@@ -1746,6 +1746,9 @@ class EventsController extends AppController {
 	}
 
 	public function downloadExport($type, $extra = null) {
+		if (Configure::read('MISP.disable_cached_exports')) {
+			throw new MethodNotAllowedException('This feature is currently disabled');
+		}
 		if ($this->_isSiteAdmin()) $org = 'ADMIN';
 		else $org = $this->Auth->user('Organisation')['name'];
 		$this->autoRender = false;

app/Controller/JobsController.php

@@ -101,6 +101,9 @@ class JobsController extends AppController {
 	}
 
 	public function cache($type) {
+		if (Configure::read('MISP.disable_cached_exports')) {
+			throw new MethodNotAllowedException('This feature is currently disabled');
+		}
 		if ($this->_isSiteAdmin()) {
 			$target = 'All events.';
 		} else {

app/Model/Server.php

@@ -161,6 +161,16 @@ class Server extends AppModel {
 							'test' => 'testForEmpty',
 							'type' => 'string',
 					),
+					'disable_cached_exports' => array(
+							'level' => 1,
+							'description' => 'Cached exports can take up a considerable amount of space and can be disabled instance wide using this setting. Disabling the cached exports is not recommended as it\'s a valuable feature, however, if your server is having free space issues it might make sense to take this step.',
+							'value' => false,
+							'null' => true,
+							'errorMessage' => '',
+							'test' => 'testDisableCache',
+							'type' => 'boolean',
+							'afterHook' => 'disableCacheAfterHook',
+					),
 					'header' => array(
 							'level' => 3,
 							'description' => 'This setting is deprecated and can be safely removed.',
@@ -2173,6 +2183,11 @@ class Server extends AppModel {
 		return true;
 	}
 
+	public function testDisableCache($value) {
+		if (isset($value) && $value) return 'Export caches are disabled.';
+		return true;
+	}
+
 	public function testLive($value) {
 		if ($this->testBool($value) !== true) return $this->testBool($value);
 		if (!$value) return 'MISP disabled.';
@@ -2310,6 +2325,29 @@ class Server extends AppModel {
 		return true;
 	}
 
+	public function disableCacheAfterHook($setting, $value) {
+		if ($value) {
+			$this->Event = ClassRegistry::init('Event');
+			App::uses('Folder', 'Utility');
+			App::uses('File', 'Utility');
+			// delete all cache files
+			foreach ($this->Event->export_types as $type => $settings) {
+				$dir = new Folder(APP . 'tmp/cached_exports/' . $type);
+				// No caches created for this type of export, move on
+				if ($dir == null) {
+					continue;
+				}
+				$files = $dir->find('.*' . $settings['extension']);
+				foreach ($files as $file) {
+					$file = new File($dir->pwd() . DS . $file);
+					$file->delete();
+					$file->close();
+				}
+			}
+		}
+		return true;
+	}
+
 	public function correlationAfterHook($setting, $value) {
 		if (!Configure::read('MISP.background_jobs')) {
 			$this->Attribute = ClassRegistry::init('Attribute');