[admin] check for correct PHP memcached module

core/js/setupchecks.js

@@ -98,6 +98,12 @@
 							type: OC.SetupChecks.MESSAGE_TYPE_WARNING
 						});
 					}
+					if(!data.isCorrectMemcachedPHPModuleInstalled) {
+						messages.push({
+							msg: t('core', 'Memcached is configured as distributed cache, but the wrong PHP module "memcache" is installed. \\OC\\Memcache\\Memcached only supports "memcached" and not "memcache". See the <a href="{wikiLink}">memcached wiki about both modules</a>.', {wikiLink: 'https://code.google.com/p/memcached/wiki/PHPClientComparison'}),
+							type: OC.SetupChecks.MESSAGE_TYPE_WARNING
+						});
+					}
 				} else {
 					messages.push({
 						msg: t('core', 'Error occurred while checking server setup'),

core/js/tests/specs/setupchecksSpec.js

@@ -73,7 +73,8 @@ describe('OC.SetupChecks tests', function() {
 					isUrandomAvailable: true,
 					serverHasInternetConnection: false,
 					memcacheDocs: 'https://doc.owncloud.org/server/go.php?to=admin-performance',
-					forwardedForHeadersWorking: true
+					forwardedForHeadersWorking: true,
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 
@@ -106,7 +107,8 @@ describe('OC.SetupChecks tests', function() {
 					serverHasInternetConnection: false,
 					dataDirectoryProtected: false,
 					memcacheDocs: 'https://doc.owncloud.org/server/go.php?to=admin-performance',
-					forwardedForHeadersWorking: true
+					forwardedForHeadersWorking: true,
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 
@@ -141,7 +143,8 @@ describe('OC.SetupChecks tests', function() {
 					serverHasInternetConnection: false,
 					dataDirectoryProtected: false,
 					isMemcacheConfigured: true,
-					forwardedForHeadersWorking: true
+					forwardedForHeadersWorking: true,
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 
@@ -173,7 +176,8 @@ describe('OC.SetupChecks tests', function() {
 					serverHasInternetConnection: true,
 					dataDirectoryProtected: true,
 					isMemcacheConfigured: true,
-					forwardedForHeadersWorking: true
+					forwardedForHeadersWorking: true,
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 
@@ -186,6 +190,34 @@ describe('OC.SetupChecks tests', function() {
 			});
 		});
 
+		it('should return an error if the wrong memcache PHP module is installed', function(done) {
+			var async = OC.SetupChecks.checkSetup();
+
+			suite.server.requests[0].respond(
+				200,
+				{
+					'Content-Type': 'application/json',
+				},
+				JSON.stringify({
+					isUrandomAvailable: true,
+					securityDocs: 'https://docs.owncloud.org/myDocs.html',
+					serverHasInternetConnection: true,
+					dataDirectoryProtected: true,
+					isMemcacheConfigured: true,
+					forwardedForHeadersWorking: true,
+					isCorrectMemcachedPHPModuleInstalled: false,
+				})
+			);
+
+			async.done(function( data, s, x ){
+				expect(data).toEqual([{
+					msg: 'Memcached is configured as distributed cache, but the wrong PHP module "memcache" is installed. \\OC\\Memcache\\Memcached only supports "memcached" and not "memcache". See the <a href="https://code.google.com/p/memcached/wiki/PHPClientComparison">memcached wiki about both modules</a>.',
+					type: OC.SetupChecks.MESSAGE_TYPE_WARNING
+				}]);
+				done();
+			});
+		});
+
 		it('should return an error if the forwarded for headers are not working', function(done) {
 			var async = OC.SetupChecks.checkSetup();
 
@@ -200,7 +232,8 @@ describe('OC.SetupChecks tests', function() {
 					dataDirectoryProtected: true,
 					isMemcacheConfigured: true,
 					forwardedForHeadersWorking: false,
-					reverseProxyDocs: 'https://docs.owncloud.org/foo/bar.html'
+					reverseProxyDocs: 'https://docs.owncloud.org/foo/bar.html',
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 
@@ -248,7 +281,8 @@ describe('OC.SetupChecks tests', function() {
 					dataDirectoryProtected: true,
 					isMemcacheConfigured: true,
 					forwardedForHeadersWorking: true,
-					phpSupported: {eol: true, version: '5.4.0'}
+					phpSupported: {eol: true, version: '5.4.0'},
+					isCorrectMemcachedPHPModuleInstalled: true,
 				})
 			);
 

settings/controller/checksetupcontroller.php

@@ -210,6 +210,23 @@ class CheckSetupController extends Controller {
 		return true;
 	}
 
+	/**
+	 * Checks if the correct memcache module for PHP is installed. Only
+	 * fails if memcached is configured and the working module is not installed.
+	 *
+	 * @return bool
+	 */
+	private function isCorrectMemcachedPHPModuleInstalled() {
+		if ($this->config->getSystemValue('memcache.distributed', null) !== '\OC\Memcache\Memcached') {
+			return true;
+		}
+
+		// there are two different memcached modules for PHP
+		// we only support memcached and not memcache
+		// https://code.google.com/p/memcached/wiki/PHPClientComparison
+		return !extension_loaded('memcached') && extension_loaded('memcache');
+	}
+
 	/**
 	 * @return DataResponse
 	 */
@@ -226,6 +243,7 @@ class CheckSetupController extends Controller {
 				'phpSupported' => $this->isPhpSupported(),
 				'forwardedForHeadersWorking' => $this->forwardedForHeadersWorking(),
 				'reverseProxyDocs' => $this->urlGenerator->linkToDocs('admin-reverse-proxy'),
+				'isCorrectMemcachedPHPModuleInstalled' => $this->isCorrectMemcachedPHPModuleInstalled()
 			]
 		);
 	}

tests/settings/controller/CheckSetupControllerTest.php

@@ -346,6 +346,7 @@ class CheckSetupControllerTest extends TestCase {
 				],
 				'forwardedForHeadersWorking' => true,
 				'reverseProxyDocs' => 'reverse-proxy-doc-link',
+				'isCorrectMemcachedPHPModuleInstalled' => true,
 			]
 		);
 		$this->assertEquals($expected, $this->checkSetupController->check());