Ensuring the response content type is correct

code/RestfulServer.php

@@ -564,6 +564,15 @@ protected function postHandler($className, $id, $actionName) {
 				$this->getResponse()->setStatusCode(201); // Created
 			}
 
+			if(isset($result->class)) {
+				$formatterClass = $result->class;
+			}
+			else {
+				$formatterClass = $className;
+			}
+			$responseFormatter = $this->getResponseDataFormatter($formatterClass);
+			$this->getResponse()->addHeader('Content-Type', $responseFormatter->getOutputContentType());
+
 			// Handle validation errors
 			if($result instanceof ValidationResult) {
 				return $this->handleValidationError($result, $reqFormatter);
@@ -581,10 +590,6 @@ protected function postHandler($className, $id, $actionName) {
 				return $result;
 			}
 
-			$responseFormatter = $this->getResponseDataFormatter($result->class);
-
-			$this->getResponse()->addHeader('Content-Type', $responseFormatter->getOutputContentType());
-
 			// Append the default extension for the output format to the Location header
 			// or else we'll use the default (XML)
 			$types = $responseFormatter->supportedExtensions();