Merge pull request #215 from NIAEFEUP/fix/proxy-cors

Fix/proxy cors

src/routes/api/[...endpoint]/+server.ts

@@ -3,11 +3,19 @@ import { fetchWithAuth } from './proxy';
 import { endpoint } from '$lib/api/proxy';
 
 const dispatchToBackend: RequestHandler = async (event) => {
-  const body = event.request.method === 'GET' ? undefined : await event.request.text();
+  const body =
+    event.request.method === 'GET' ||
+    event.request.method === 'OPTIONS' ||
+    event.request.method === 'HEAD'
+      ? undefined
+      : await event.request.text();
   return fetchWithAuth(event.cookies, endpoint(event.url), event.request.method, undefined, body);
 };
 
 export const GET: RequestHandler = dispatchToBackend;
 export const POST: RequestHandler = dispatchToBackend;
 export const PUT: RequestHandler = dispatchToBackend;
 export const DELETE: RequestHandler = dispatchToBackend;
+export const PATCH: RequestHandler = dispatchToBackend;
+export const OPTIONS: RequestHandler = dispatchToBackend;
+export const HEAD: RequestHandler = dispatchToBackend;

src/routes/api/[...endpoint]/proxy.ts

@@ -11,6 +11,10 @@ async function _fetchApi(
   const url = new URL(relativeUrl, PUBLIC_API_URL);
   headers ??= new Headers();
   headers.append('Content-Type', 'application/json');
+  headers.append('Accept', 'application/json');
+  if (window?.location?.origin) {
+    headers.append('Origin', window.location.origin);
+  }
   return fetch(url, { method: method, body, headers });
 }