Enable `UrlNormalizer` in `UrlManger` by default

framework/UPGRADE.md

@@ -37,13 +37,15 @@ Upgrade to Yii 2.1.0
 * `yii\filters\AccessControl` has been optimized by only instantiating rules at the moment of use.
    This could lead to a potential BC-break if you are depending on $rules to be instantiated in init().
 
-Upgrade from Yii 2.0.8
-----------------------
-
 * Method `yii\web\Request::getBodyParams()` has been changed to pass full value of 'content-type' header to the second
   argument of `yii\web\RequestParserInterface::parse()`. If you create your own custom parser, which relies on `$contentType`
   argument, ensure to process it correctly as it may content additional data.
 
+* `yii\web\UrlNormalizer` is now enabled by default in `yii\web\UrlManager`.
+  If you are using `yii\web\Request::resolve()` or `yii\web\UrlManager::parseRequest()` directly,
+  make sure all potential exceptions are handled correctly.
+
+
 Upgrade from Yii 2.0.8
 ----------------------
 

framework/web/UrlManager.php

@@ -127,22 +127,11 @@ class UrlManager extends Component
      */
     public $ruleConfig = ['class' => UrlRule::class];
     /**
-     * @var UrlNormalizer|array|string|false the configuration for [[UrlNormalizer]] used by this UrlManager.
-     * The default value is `false`, which means normalization will be skipped.
-     * If you wish to enable URL normalization, you should configure this property manually.
-     * For example:
-     *
-     * ```php
-     * [
-     *     'class' => 'yii\web\UrlNormalizer',
-     *     'collapseSlashes' => true,
-     *     'normalizeTrailingSlash' => true,
-     * ]
-     * ```
-     *
+     * @var UrlNormalizer|array|false the configuration for [[UrlNormalizer]] used by this UrlManager.
+     * If `false` normalization will be skipped.
      * @since 2.0.10
      */
-    public $normalizer = false;
+    public $normalizer = ['class' => UrlNormalizer::class];
 
     /**
      * @var string the cache key for cached rules
@@ -164,7 +153,7 @@ class UrlManager extends Component
         parent::init();
 
         if ($this->normalizer !== false) {
-            $this->normalizer = Instance::ensure($this->normalizer, UrlNormalizer::className());
+            $this->normalizer = Instance::ensure($this->normalizer, UrlNormalizer::class);
         }
 
         if (!$this->enablePrettyUrl || empty($this->rules)) {

framework/web/UrlRule.php

@@ -139,7 +139,7 @@ class UrlRule extends Object implements UrlRuleInterface
             throw new InvalidConfigException('UrlRule::route must be set.');
         }
         if (is_array($this->normalizer)) {
-            $normalizerConfig = array_merge(['class' => UrlNormalizer::className()], $this->normalizer);
+            $normalizerConfig = array_merge(['class' => UrlNormalizer::class], $this->normalizer);
             $this->normalizer = Yii::createObject($normalizerConfig);
         }
         if ($this->normalizer !== null && $this->normalizer !== false && !$this->normalizer instanceof UrlNormalizer) {

tests/framework/web/UrlRuleTest.php

@@ -64,7 +64,6 @@ class UrlRuleTest extends TestCase
     {
         $manager = new UrlManager([
             'cache' => null,
-            'normalizer' => UrlNormalizer::class,
         ]);
         $request = new Request(['hostInfo' => 'http://en.example.com']);
         $suites = $this->getTestsForParseRequest();