Properly return 304

The ETag set in the IF_NONE_MODIFIED header is wraped in quotes (").
However the ETag that is set in response is not (yet). Also we need to
cast the ETag to a string.

* Added unit test

lib/private/appframework/http.php

@@ -121,7 +121,7 @@ class Http extends BaseHttp {
 
 		// if etag or lastmodified have not changed, return a not modified
 		if ((isset($this->server['HTTP_IF_NONE_MATCH'])
-			&& trim($this->server['HTTP_IF_NONE_MATCH']) === $ETag) 
+			&& trim(trim($this->server['HTTP_IF_NONE_MATCH']), '"') === (string)$ETag)
 
 			||
 

tests/lib/appframework/http/HttpTest.php

@@ -65,6 +65,14 @@ class HttpTest extends \Test\TestCase {
 	}
 
 
+	public function testQuotedEtagMatchReturnsNotModified() {
+		$http = new Http(array('HTTP_IF_NONE_MATCH' => '"hi"'));
+
+		$header = $http->getStatusHeader(Http::STATUS_OK, null, 'hi');
+		$this->assertEquals('HTTP/1.1 304 Not Modified', $header);
+	}
+
+
 	public function testLastModifiedMatchReturnsNotModified() {
 		$dateTime = new \DateTime(null, new \DateTimeZone('GMT'));
 		$dateTime->setTimestamp('12');