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from fastapi import FastAPI, Request, Header, HTTPException
from fastapi.responses import JSONResponse, Response
import httpx
app = FastAPI()
# Your internal real API key for TypeGPT (not exposed to users)
REAL_API_KEY = "sk-qO9N6kQEEULMWtF4YGVlTTSjIPllEm1h1wfEBzSmnSbxiXwe"
BASE_URL = "https://fast.typegpt.net"
# Public token users must send in their Authorization header
PUBLIC_AUTH_TOKEN = "TypeGPT-Free4ALL"
@app.api_route("/{path:path}", methods=["GET", "POST"])
async def proxy(request: Request, path: str, authorization: str = Header(None)):
# Validate the Authorization header
if not authorization or not authorization.startswith("Bearer "):
raise HTTPException(status_code=401, detail="Missing or malformed Authorization header.")
token = authorization.replace("Bearer ", "").strip()
if token != PUBLIC_AUTH_TOKEN:
raise HTTPException(status_code=401, detail="Invalid Authorization token. Use 'TypeGPT-Free4ALL'.")
# Construct URL to forward to the real backend
target_url = f"{BASE_URL}/{path}"
# Prepare headers with real API key
headers = dict(request.headers)
headers["Authorization"] = f"Bearer {REAL_API_KEY}"
headers.pop("host", None)
# Forward the request body
body = await request.body()
async with httpx.AsyncClient() as client:
try:
response = await client.request(
method=request.method,
url=target_url,
content=body,
headers=headers,
timeout=60 # prevent hanging
)
except httpx.RequestError as e:
raise HTTPException(status_code=502, detail=f"Request to backend failed: {e}")
# Log response for debugging
print("TypeGPT Response Status:", response.status_code)
print("TypeGPT Response Headers:", response.headers)
print("TypeGPT Response Content:", response.text[:200]) # limit output
# Try to return JSON response, fallback to raw
try:
return JSONResponse(content=response.json(), status_code=response.status_code)
except Exception:
return Response(
content=response.content,
status_code=response.status_code,
media_type=response.headers.get("content-type", "text/plain")
)
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