Hijack requests to self and redirect to local URL

src/hooks.server.ts

@@ -0,0 +1,20 @@
+import { type HandleFetch } from "@sveltejs/kit";
+
+export const handleFetch: HandleFetch = async ({ request, fetch }) => {
+    if (request.url.startsWith('https://maps.owlboard.info')) {
+        const newUrl = request.url.replace('https://maps.owlboard.info', 'http://localhost:3000');
+        
+        const headers = new Headers(request.headers);
+        headers.set('host', 'maps.owlboard.info');
+
+        request = new Request(newUrl, {
+            method: request.method,
+            headers: headers,
+            body: request.body,
+            // @ts-ignore - 'duplex' is needed for node fetch with bodies
+            duplex: 'half' 
+        });
+    }
+
+    return fetch(request);
+}