Allow non-urlencoded content as request body

Author: svycka

src/Controller/AbstractRestfulController.php

@@ -560,8 +560,8 @@ protected function getIdentifier($routeMatch, $request)
      *
      * If the content-type indicates a JSON payload, the payload is immediately
      * decoded and the data returned. Otherwise, the data is passed to
-     * parse_str(). If that function returns a single-member array with a key
-     * of "0", the method assumes that we have non-urlencoded content and
+     * parse_str(). If that function returns a single-member array with a empty
+     * value, the method assumes that we have non-urlencoded content and
      * returns the raw content; otherwise, the array created is returned.
      *
      * @param  mixed $request
@@ -578,10 +578,9 @@ protected function processBodyContent($request)
 
         parse_str($content, $parsedParams);
 
-        // If parse_str fails to decode, or we have a single element with key
-        // 0, return the raw content.
-        if (!is_array($parsedParams)
-            || (1 == count($parsedParams) && isset($parsedParams[0]))
+        // If parse_str fails to decode, or we have a single element with empty value
+        if (!is_array($parsedParams) || empty($parsedParams)
+            || (1 == count($parsedParams) && '' === reset($parsedParams))
         ) {
             return $content;
         }