Adds customizable parsing functionality to the web\Request class (Issue #2043)

framework/web/JsonParser.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\web;
+
+use yii\base\InvalidParamException;
+use yii\helpers\Json;
+
+/**
+ * Parses a raw HTTP request using Json::encode()
+ *
+ * @author Dan Schmidt <danschmidt5189@gmail.com>
+ * @since 2.0
+ */
+class JsonParser implements RequestParserInterface
+{
+    /**
+     * @var boolean whether to return objects in terms of associative arrays.
+     */
+    public $asArray = true;
+
+    /**
+     * @var boolean whether to throw an exception if the body is invalid json
+     */
+    public $throwException = false;
+
+    /**
+     * @param string $rawBody the raw HTTP request body
+     * @return array parameters parsed from the request body
+     */
+	public function parse($rawBody)
+    {
+        try {
+            return Json::encode($rawBody, $this->asArray);
+        } catch (InvalidParamException $e) {
+            if ($this->throwException) {
+                throw $e;
+            }
+            return null;
+        }
+    }
+}

framework/web/Request.php

@@ -128,6 +128,13 @@ class Request extends \yii\base\Request
 	 * @see getRestParams()
 	 */
 	public $restVar = '_method';
+    /**
+     * @var array the parsers for converting the raw request body into [[restParams]]
+     * The array keys are the request content-types, and the array values are the
+     * corresponding configurations for creating the parser objects.
+     * @see getRestParams()
+     */
+    public $parsers = [];
 
 	private $_cookies;
 
@@ -257,8 +264,12 @@ class Request extends \yii\base\Request
 		if ($this->_restParams === null) {
 			if (isset($_POST[$this->restVar])) {
 				$this->_restParams = $_POST;
-			} elseif(strncmp($this->getContentType(), 'application/json', 16) === 0) {
-				$this->_restParams = Json::decode($this->getRawBody(), true);
+			} else if (isset($this->parsers[$this->getContentType()])) {
+				$parser = Yii::createObject($this->parsers[$this->getContentType()]);
+                if (! $parser instanceof RequestParserInterface) {
+                    throw new InvalidConfigException("The '{$this->contentType}' request parser is invalid. It must implement the RequestParserInterface.");
+                }
+                $this->_restParams = $parser->parse($this->getRawBody());
 			} else {
 				$this->_restParams = [];
 				mb_parse_str($this->getRawBody(), $this->_restParams);

framework/web/RequestParserInterface.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\web;
+
+/**
+ * Interface for objects that parse the raw request body into a parameters array
+ *
+ * @author Dan Schmidt <danschmidt5189@gmail.com>
+ * @since 2.0
+ */
+interface RequestParserInterface
+{
+    /**
+     * @param string $rawBody the raw HTTP request body
+     * @return array parameters parsed from the request body
+     */
+	public function parse($rawBody);
+}