[O] Don't 200 error

server/host.py

@@ -3,7 +3,7 @@ import random
 from fastapi.responses import RedirectResponse
 import uvicorn
 from subprocess import check_output
-from fastapi import FastAPI, Request
+from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
 from pathlib import Path
 
@@ -61,7 +61,7 @@ async def input_request(request: Request):
 async def get_puzzle(id: str):
     tf = data / f"{id}.json"
     if not tf.exists():
-        return {"error": "Puzzle not found"}
+        raise HTTPException(status_code=404, detail="Puzzle not found")
     return json.loads(tf.read_text())
 
 

src/Launcher.svelte

@@ -6,9 +6,10 @@
   const urlParams = new URLSearchParams(window.location.search);
   const puzzleId = urlParams.get("puzzle");
   let puzzleData: Checkpoint | null = null;
+  let error: string | null = null;
 
   if (!puzzleId) window.location.href = "/?puzzle=meow";
-  else Backend.get(puzzleId).then((data) => (puzzleData = data));
+  else Backend.get(puzzleId).then((data) => (puzzleData = data)).catch((e) => (error = e));
 </script>
 
 {#if puzzleData !== null && puzzleId !== null}
@@ -18,8 +19,12 @@
     <div>
       {#if puzzleId === null}
         <a href="/?puzzle=meow">Redirecting...</a>
+      {:else if error}
+        <h2 class="error">Error</h2>
+        <span>{error}</span>
       {:else}
-        <div>Loading...</div>
+        <h2>Loading...</h2>
+        <span>Fetching puzzle data...</span>
       {/if}
     </div>
   </div>