File size: 8,866 Bytes
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import json
import os
import ssl
from typing import Any, Dict
import certifi
from flask import current_app, request
from flask_sock import Sock
from websockets.sync.client import connect as websocket_connect
from websockets.exceptions import ConnectionClosed
from .responses_api import (
ResponsesRequestError,
extract_client_session_id,
normalize_responses_payload,
)
from .session import (
clear_responses_reuse_state,
note_responses_stream_event,
prepare_responses_request_for_session,
)
from .upstream import build_upstream_headers, build_upstream_websocket_url
from .utils import get_effective_chatgpt_auth
def _log_json(prefix: str, payload: Any) -> None:
try:
print(f"{prefix}\n{json.dumps(payload, indent=2, ensure_ascii=False)}")
except Exception:
try:
print(f"{prefix}\n{payload}")
except Exception:
pass
def _error_event(message: str, *, status_code: int = 400, code: str | None = None) -> Dict[str, Any]:
error: Dict[str, Any] = {"message": message}
if code:
error["code"] = code
return {"type": "error", "status_code": status_code, "error": error}
def _is_terminal_event(event: Any) -> bool:
if not isinstance(event, dict):
return False
kind = event.get("type")
return kind in ("response.completed", "response.failed", "error")
def _build_websocket_ssl_context() -> ssl.SSLContext:
cafile = (
os.getenv("CODEX_CA_CERTIFICATE")
or os.getenv("SSL_CERT_FILE")
or certifi.where()
)
return ssl.create_default_context(cafile=cafile)
def connect_upstream_websocket(url: str, headers: Dict[str, str]):
return websocket_connect(
url,
additional_headers=headers,
open_timeout=15,
ssl=_build_websocket_ssl_context(),
)
def register_websocket_routes(sock: Sock) -> None:
@sock.route("/v1/responses")
def responses_websocket(ws) -> None:
verbose = bool(current_app.config.get("VERBOSE"))
upstream_ws = None
upstream_session_id: str | None = None
active_session_id: str | None = None
def _send_error(message: str, *, status_code: int = 400, code: str | None = None) -> None:
evt = _error_event(message, status_code=status_code, code=code)
if verbose:
_log_json("STREAM OUT WS /v1/responses (error)", evt)
try:
ws.send(json.dumps(evt))
except Exception:
pass
try:
while True:
incoming = ws.receive()
if incoming is None:
break
if isinstance(incoming, bytes):
incoming_text = incoming.decode("utf-8", errors="ignore")
else:
incoming_text = str(incoming)
if verbose:
print("IN WS /v1/responses\n" + incoming_text)
try:
payload = json.loads(incoming_text)
except Exception:
_send_error("Websocket frames must be valid JSON objects.", status_code=400)
break
if not isinstance(payload, dict):
_send_error("Websocket frames must be JSON objects.", status_code=400)
break
client_session_id = extract_client_session_id(request.headers)
outbound_text = incoming_text
session_id = upstream_session_id
if payload.get("type") == "response.create":
try:
normalized = normalize_responses_payload(
payload,
config=current_app.config,
client_session_id=client_session_id,
)
except ResponsesRequestError as exc:
_send_error(str(exc), status_code=exc.status_code, code=exc.code)
continue
if normalized.service_tier_resolution.warning_message and verbose:
print(f"[FastMode] {normalized.service_tier_resolution.warning_message}")
prepared = prepare_responses_request_for_session(
normalized.session_id,
normalized.payload,
allow_previous_response_id=True,
)
outbound_text = json.dumps(prepared.payload)
session_id = normalized.session_id
active_session_id = normalized.session_id
if verbose:
_log_json("OUTBOUND >> ChatGPT Responses WS payload", prepared.payload)
elif upstream_ws is None:
_send_error(
"The first websocket message must be a response.create request.",
status_code=400,
)
break
if upstream_ws is None or (session_id and session_id != upstream_session_id):
access_token, account_id = get_effective_chatgpt_auth()
if not access_token or not account_id:
if session_id:
clear_responses_reuse_state(session_id)
_send_error(
"Missing ChatGPT credentials. Run 'python3 chatmock.py login' first.",
status_code=401,
)
break
if upstream_ws is not None:
try:
upstream_ws.close()
except Exception:
pass
effective_session_id = session_id or client_session_id or ""
try:
upstream_ws = connect_upstream_websocket(
build_upstream_websocket_url(),
build_upstream_headers(
access_token,
account_id,
effective_session_id,
accept="application/json",
),
)
except Exception as exc:
if session_id:
clear_responses_reuse_state(session_id)
_send_error(
f"Upstream websocket connection failed: {exc}",
status_code=502,
)
break
upstream_session_id = effective_session_id
upstream_ws.send(outbound_text)
while True:
try:
upstream_message = upstream_ws.recv()
except ConnectionClosed:
if active_session_id:
clear_responses_reuse_state(active_session_id)
_send_error("Upstream websocket closed unexpectedly.", status_code=502)
return
if upstream_message is None:
if active_session_id:
clear_responses_reuse_state(active_session_id)
_send_error("Upstream websocket closed unexpectedly.", status_code=502)
return
if verbose:
try:
print("STREAM OUT WS /v1/responses\n" + str(upstream_message))
except Exception:
pass
ws.send(upstream_message)
try:
parsed = json.loads(upstream_message)
except Exception:
parsed = None
if isinstance(parsed, dict) and active_session_id:
note_responses_stream_event(active_session_id, parsed)
if _is_terminal_event(parsed):
if isinstance(parsed, dict) and parsed.get("type") in ("response.failed", "error"):
if upstream_ws is not None:
try:
upstream_ws.close()
except Exception:
pass
upstream_ws = None
upstream_session_id = None
break
finally:
if upstream_ws is not None:
try:
upstream_ws.close()
except Exception:
pass
|