Handle empty request body.

Author: ariademur

src/WebServCo/JSONAPI/Service/Handler/JSONAPIItemHandler.php

@@ -89,6 +89,15 @@ public function handleRequest(ServerRequestInterface $request): bool
      */
     private function handleFormProcessing(array $requestBodyAsArray): bool
     {
+        if ($requestBodyAsArray === []) {
+            /**
+             * Request body is an empty array if request should not have a body.
+             *
+             * @see JSONAPIRequestService.getRequestBodyAsArray
+             */
+            return true;
+        }
+
         /**
          * Start from local fields and iterate,
          * because id is stored in the actual formField (string key),
@@ -120,6 +129,15 @@ private function handleFormProcessing(array $requestBodyAsArray): bool
      */
     private function handleVersionMatchCheck(array $requestBodyAsArray): bool
     {
+        if ($requestBodyAsArray === []) {
+            /**
+             * Request body is an empty array if request should not have a body.
+             *
+             * @see JSONAPIRequestService.getRequestBodyAsArray
+             */
+            return true;
+        }
+
         try {
             if (!$this->requestService->versionMatches($requestBodyAsArray, 1.1)) {
                 $this->addErrorMessage('JSONAPI version does not match.');

src/WebServCo/JSONAPI/Service/JSONAPIRequestService.php

@@ -34,6 +34,11 @@ public function getRequestBodyAsArray(ServerRequestInterface $request): array
         $requestBody = $request->getBody()->getContents();
 
         if ($requestBody === '') {
+            if (!$this->requestBodyService->canHaveRequestBody($request)) {
+                // Correct that there is no request body.
+                return [];
+            }
+
             // Possible situation: the body contents were read elsewhere and the stream was not rewinded.
             throw new UnexpectedValueException('Request body is empty.');
         }