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import json
import random
from fastapi import Request, HTTPException
from fastapi.responses import StreamingResponse, Response
from starlette.background import BackgroundTask
from chatgpt.authorization import verify_token, get_req_token
from utils.Client import Client
from utils.config import chatgpt_base_url_list, proxy_url_list, enable_gateway
headers_reject_list = [
"x-real-ip",
"x-forwarded-for",
"x-forwarded-proto",
"x-forwarded-port",
"x-forwarded-host",
"x-forwarded-server",
"cf-warp-tag-id",
"cf-visitor",
"cf-ray",
"cf-connecting-ip",
"cf-ipcountry",
"cdn-loop",
"remote-host",
"x-frame-options",
"x-xss-protection",
"x-content-type-options",
"content-security-policy",
"host",
"cookie",
"connection",
"content-length",
"content-encoding",
"x-middleware-prefetch",
"x-nextjs-data",
"purpose",
"x-forwarded-uri",
"x-forwarded-path",
"x-forwarded-method",
"x-forwarded-protocol",
"x-forwarded-scheme",
"cf-request-id",
"cf-worker",
"cf-access-client-id",
"cf-access-client-device-type",
"cf-access-client-device-model",
"cf-access-client-device-name",
"cf-access-client-device-brand",
"x-middleware-prefetch",
"x-forwarded-for",
"x-forwarded-host",
"x-forwarded-proto",
"x-forwarded-server",
"x-real-ip",
"x-forwarded-port",
"cf-connecting-ip",
"cf-ipcountry",
"cf-ray",
"cf-visitor",
]
async def chatgpt_reverse_proxy(request: Request, path: str):
try:
origin_host = request.url.netloc
if request.url.is_secure:
petrol = "https"
else:
petrol = "http"
if "x-forwarded-proto" in request.headers:
petrol = request.headers["x-forwarded-proto"]
if "cf-visitor" in request.headers:
cf_visitor = json.loads(request.headers["cf-visitor"])
petrol = cf_visitor.get("scheme", petrol)
params = dict(request.query_params)
request_cookies = dict(request.cookies)
headers = {
key: value for key, value in request.headers.items()
if (key.lower() not in ["host", "origin", "referer"] and key.lower() not in headers_reject_list)
}
base_url = random.choice(chatgpt_base_url_list) if chatgpt_base_url_list else "https://chatgpt.com"
if "assets/" in path:
base_url = "https://cdn.oaistatic.com"
if "file-" in path and "backend-api" not in path:
base_url = "https://files.oaiusercontent.com"
# req_token = request.cookies.get("req_token")
# ua = get_ua(req_token)
# headers.update(ua)
headers.update({
"accept-language": "en-US,en;q=0.9",
"host": base_url.replace("https://", "").replace("http://", ""),
"origin": base_url,
"referer": f"{base_url}/",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
})
seed_token = headers.get("authorization", "").replace("Bearer ", "")
if seed_token:
req_token = get_req_token(seed_token)
access_token = await verify_token(req_token)
if access_token.startswith("eyJhbGciOi"):
headers.update({"authorization": access_token})
else:
req_token = get_req_token(None, seed_token)
access_token = await verify_token(req_token)
headers.update({"authorization": access_token})
else:
headers.pop("authorization", None)
data = await request.body()
client = Client(proxy=random.choice(proxy_url_list) if proxy_url_list else None)
try:
background = BackgroundTask(client.close)
r = await client.request(request.method, f"{base_url}/{path}", params=params, headers=headers,
cookies=request_cookies, data=data, stream=True, allow_redirects=False)
if r.status_code == 302:
return Response(status_code=302,
headers={"Location": r.headers.get("Location").replace("chatgpt.com", origin_host)
.replace("cdn.oaistatic.com", origin_host)
.replace("https", petrol)}, background=background)
elif 'stream' in r.headers.get("content-type", ""):
return StreamingResponse(r.aiter_content(), media_type=r.headers.get("content-type", ""),
background=background)
else:
if "/backend-api/conversation" in path or "/register-websocket" in path:
response = Response(content=(await r.atext()), media_type=r.headers.get("content-type"),
status_code=r.status_code, background=background)
else:
content = ((await r.atext()).replace("chatgpt.com", origin_host)
.replace("cdn.oaistatic.com", origin_host)
# .replace("files.oaiusercontent.com", origin_host)
.replace("https", petrol))
rheaders = dict(r.headers)
content_type = rheaders.get("content-type", "")
cache_control = rheaders.get("cache-control", "")
expires = rheaders.get("expires", "")
rheaders = {
"cache-control": cache_control,
"content-type": content_type,
"expires": expires
}
response = Response(content=content, headers=rheaders,
status_code=r.status_code, background=background)
return response
except Exception:
await client.close()
except Exception as e:
raise HTTPException(status_code=500, detail=str(e))
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