chore: fix url being broken on linux

Author: MatthiasHarzer

Diff for: server.py

@@ -2,21 +2,38 @@
 from fastapi.responses import PlainTextResponse
 import requests
 from fastapi import Body, FastAPI, Request, Response
+from starlette.middleware.base import BaseHTTPMiddleware
 
 ALLOWED_METHODS = ["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS", "HEAD"]
 
 
+def sanitize_url(url: str) -> str:
+    if not url.startswith("http"):
+        return url
+
+    if url.startswith("http://") or url.startswith("https://"):
+        return url
+
+    # Weird behaviour of FastAPI on linux to collapse multiple slashes
+    if url.startswith("http:/") or url.startswith("https:/"):
+        return url.replace("http:/", "http://").replace("https:/", "https://")
+
+    return url
+
+
 async def handle(url: str, request: Request, payload: Any | None = Body(None)):
     if request.method not in ALLOWED_METHODS:
         return PlainTextResponse("Method Not Allowed", status_code=405)
 
+    sanitized_url = sanitize_url(url)
+
     headers = {}
     for key, value in request.headers.items():
         if key.lower() not in ["host", "content-length"]:
             headers[key] = value
     try:
         proxy_request = requests.request(
-            request.method, url, headers=headers, json=payload)
+            request.method, sanitized_url, headers=headers, json=payload)
         return Response(content=proxy_request.content)
     except requests.exceptions.ConnectionError:
         return Response(content="Connection Error", status_code=404)