fix: Body is unusable

Author: pabl-o-ce

src/lib/getBody.ts

@@ -2,7 +2,11 @@ import type { RequestEvent } from '@sveltejs/kit';
 
 const getBody = async (event: RequestEvent) => {
   const { request } = event;
-  return request.headers.get('content-type') === 'application/json' ? request.json() : request.text();
+  if (request.body) {
+    return request.headers.get('content-type') === 'application/json' ? request.json() : request.text();
+  } else {
+    return null;
+  }
 };
 
 export { getBody };

src/lib/startServerAndCreatSvelteHandler.ts

@@ -34,7 +34,7 @@ export function startServerAndCreateSvelteKitHandler<Context extends BaseContext
     const httpGraphQLResponse = await server.executeHTTPGraphQLRequest({
       context: () => contextFunction(event),
       httpGraphQLRequest: {
-        body: await getBody(event),
+        body: await getBody(event) ?? '',
         headers: getHeaders(event),
         method: request.method,
         search: new URL(request.url).search || '',