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import os
import uvicorn
from fastapi import FastAPI, Request, HTTPException, status, WebSocketDisconnect
from fastapi.applications import AppType
from fastapi.responses import JSONResponse
from requests import Timeout, TooManyRedirects, RequestException, Session
from connection_manager import *
from request_forwarder_classes import *
PORT: int = int(os.getenv("PORT"))
PASSWORD: str = os.getenv("PASSWORD")
app: AppType = FastAPI()
connection_manager = ConnectionManager(PASSWORD)
def __get_response(forwarded_request: ForwardedRequest, session: Session | None = None) -> Tuple[int, Dict]:
try:
if not session:
session = Session()
response = session.request(
forwarded_request.method,
forwarded_request.url,
headers=forwarded_request.headers,
data=forwarded_request.data,
params=forwarded_request.params,
auth=forwarded_request.auth,
cookies=forwarded_request.cookies,
json=forwarded_request.json)
forwarded_response = ForwardedResponse.from_response(response, forwarded_request.response_content_type)
return status.HTTP_200_OK, {"response": forwarded_response.to_json_dict(), "error": None}
except ConnectionError as e:
return status.HTTP_418_IM_A_TEAPOT, {"response": None, "error": {"ConnectionError": str(e)}}
except Timeout as e:
return status.HTTP_418_IM_A_TEAPOT, {"response": None, "error": {"Timeout": str(e)}}
except TooManyRedirects as e:
return status.HTTP_418_IM_A_TEAPOT, {"response": None, "error": {"TooManyRedirects": str(e)}}
except RequestException as e:
return status.HTTP_418_IM_A_TEAPOT, {"response": None, "error": {"RequestException": str(e)}}
except Exception as e:
return status.HTTP_418_IM_A_TEAPOT, {"response": None, "error": str(e)}
@app.websocket("/ws/forward-requests")
async def websocket_endpoint(websocket: WebSocket):
await connection_manager.connect(websocket)
session = Session()
try:
while True:
request = await websocket.receive_json()
print(request)
forwarded_request = ForwardedRequest.from_json(request)
response_status, response = __get_response(forwarded_request, session)
await websocket.send_json(response)
except WebSocketDisconnect:
connection_manager.disconnect(websocket)
@app.post("/forward-request")
async def forward_request(forwarded_request: ForwardedRequest, request: Request):
authorization: str = request.headers.get("Authorization")
if not authorization:
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Authorization header missing")
token_type, _, token = authorization.partition(' ')
if token_type != "Bearer" or not token:
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid authorization header format")
if token != PASSWORD:
raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Invalid token")
response_status, response = __get_response(forwarded_request)
return JSONResponse(content=response, status_code=response_status)
if __name__ == '__main__':
uvicorn.run("main:app", host="0.0.0.0", port=PORT)
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