Make dispatcher::cached() use here()

This allows separate cache files to be created
for different query parameters.

Fixes #2381

lib/Cake/Routing/Dispatcher.php

@@ -68,7 +68,7 @@ public function __construct($base = false) {
  *    are encountered.
  */
 	public function dispatch(CakeRequest $request, CakeResponse $response, $additionalParams = array()) {
-		if ($this->asset($request->url, $response) || $this->cached($request->here)) {
+		if ($this->asset($request->url, $response) || $this->cached($request->here())) {
 			return;
 		}
 
@@ -203,7 +203,7 @@ protected function _loadRoutes() {
 /**
  * Outputs cached dispatch view cache
  *
- * @param string $path Requested URL path
+ * @param string $path Requested URL path with any query string parameters
  * @return string|boolean False if is not cached or output
  */
 	public function cached($path) {

lib/Cake/Test/Case/Routing/DispatcherTest.php

@@ -1360,6 +1360,7 @@ public function testAssetFilterForThemeAndPlugins() {
  * - Test simple views
  * - Test views with nocache tags
  * - Test requests with named + passed params.
+ * - Test requests with query string params
  * - Test themed views.
  *
  * @return array
@@ -1373,6 +1374,7 @@ public static function cacheActionProvider() {
 			array('TestCachedPages/test_nocache_tags'),
 			array('test_cached_pages/view/param/param'),
 			array('test_cached_pages/view/foo:bar/value:goo'),
+			array('test_cached_pages/view?q=cakephp'),
 			array('test_cached_pages/themed'),
 		);
 	}
@@ -1405,7 +1407,7 @@ public function testFullPageCachingDispatch($url) {
 		$out = ob_get_clean();
 
 		ob_start();
-		$dispatcher->cached($request->here);
+		$dispatcher->cached($request->here());
 		$cached = ob_get_clean();
 
 		$result = str_replace(array("\t", "\r\n", "\n"), "", $out);
@@ -1414,7 +1416,7 @@ public function testFullPageCachingDispatch($url) {
 
 		$this->assertEquals($expected, $result);
 
-		$filename = $this->__cachePath($request->here);
+		$filename = $this->__cachePath($request->here());
 		unlink($filename);
 	}