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import datetime
import ssl
import http.server
import json
import secrets
import threading
import time
import urllib.parse
import urllib.request
from typing import Any, Dict, Tuple
import certifi
from .config import OAUTH_ISSUER_DEFAULT
from .models import AuthBundle, PkceCodes, TokenData
from .utils import eprint, generate_pkce, parse_jwt_claims, write_auth_file
REQUIRED_PORT = 1455
URL_BASE = f"http://localhost:{REQUIRED_PORT}"
DEFAULT_ISSUER = OAUTH_ISSUER_DEFAULT
LOGIN_SUCCESS_HTML = """<!DOCTYPE html>
<html lang=\"en\">
<head>
<meta charset=\"utf-8\" />
<title>Login successful</title>
</head>
<body>
<div style=\"max-width: 640px; margin: 80px auto; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;\">
<h1>Login successful</h1>
<p>You can now close this window and return to the terminal and run <code>python3 chatmock.py serve</code> to start the server.</p>
</div>
</body>
</html>
"""
_SSL_CONTEXT = ssl.create_default_context(cafile=certifi.where())
class OAuthHTTPServer(http.server.HTTPServer):
def __init__(
self,
server_address: tuple[str, int],
request_handler_class: type[http.server.BaseHTTPRequestHandler],
*,
home_dir: str,
client_id: str,
verbose: bool = False,
) -> None:
super().__init__(server_address, request_handler_class, bind_and_activate=True)
self.exit_code = 1
self.home_dir = home_dir
self.verbose = verbose
self.issuer = DEFAULT_ISSUER
self.token_endpoint = f"{self.issuer}/oauth/token"
self.client_id = client_id
port = server_address[1]
self.redirect_uri = f"http://localhost:{port}/auth/callback"
self.pkce = generate_pkce()
self.state = secrets.token_hex(32)
def auth_url(self) -> str:
params = {
"response_type": "code",
"client_id": self.client_id,
"redirect_uri": self.redirect_uri,
"scope": "openid profile email offline_access",
"code_challenge": self.pkce.code_challenge,
"code_challenge_method": "S256",
"id_token_add_organizations": "true",
"codex_cli_simplified_flow": "true",
"state": self.state,
}
return f"{self.issuer}/oauth/authorize?" + urllib.parse.urlencode(params)
def exchange_code(self, code: str) -> tuple[AuthBundle, str]:
data = urllib.parse.urlencode(
{
"grant_type": "authorization_code",
"code": code,
"redirect_uri": self.redirect_uri,
"client_id": self.client_id,
"code_verifier": self.pkce.code_verifier,
}
).encode()
with urllib.request.urlopen(
urllib.request.Request(
self.token_endpoint,
data=data,
method="POST",
headers={"Content-Type": "application/x-www-form-urlencoded"},
),
context=_SSL_CONTEXT,
) as resp:
payload = json.loads(resp.read().decode())
id_token = payload.get("id_token", "")
access_token = payload.get("access_token", "")
refresh_token = payload.get("refresh_token", "")
id_token_claims = parse_jwt_claims(id_token)
access_token_claims = parse_jwt_claims(access_token)
auth_claims = (id_token_claims or {}).get("https://api.openai.com/auth", {})
chatgpt_account_id = auth_claims.get("chatgpt_account_id", "")
token_data = TokenData(
id_token=id_token,
access_token=access_token,
refresh_token=refresh_token,
account_id=chatgpt_account_id,
)
api_key, success_url = self.maybe_obtain_api_key(
id_token_claims or {}, access_token_claims or {}, token_data
)
last_refresh_str = (
datetime.datetime.now(datetime.timezone.utc).isoformat().replace("+00:00", "Z")
)
bundle = AuthBundle(api_key=api_key, token_data=token_data, last_refresh=last_refresh_str)
return bundle, success_url or f"{URL_BASE}/success"
def maybe_obtain_api_key(
self,
token_claims: Dict[str, Any],
access_claims: Dict[str, Any],
token_data: TokenData,
) -> tuple[str | None, str | None]:
org_id = token_claims.get("organization_id")
project_id = token_claims.get("project_id")
if not org_id or not project_id:
query = {
"id_token": token_data.id_token,
"needs_setup": "false",
"org_id": org_id or "",
"project_id": project_id or "",
"plan_type": access_claims.get("chatgpt_plan_type"),
"platform_url": "https://platform.openai.com",
}
return None, f"{URL_BASE}/success?{urllib.parse.urlencode(query)}"
today = datetime.datetime.now(datetime.timezone.utc).strftime("%Y-%m-%d")
exchange_data = urllib.parse.urlencode(
{
"grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
"client_id": self.client_id,
"requested_token": "openai-api-key",
"subject_token": token_data.id_token,
"subject_token_type": "urn:ietf:params:oauth:token-type:id_token",
"name": f"ChatMock [auto-generated] ({today})",
}
).encode()
with urllib.request.urlopen(
urllib.request.Request(
self.token_endpoint,
data=exchange_data,
method="POST",
headers={"Content-Type": "application/x-www-form-urlencoded"},
),
context=_SSL_CONTEXT,
) as resp:
exchange_payload = json.loads(resp.read().decode())
exchanged_access_token = exchange_payload.get("access_token")
chatgpt_plan_type = access_claims.get("chatgpt_plan_type")
success_url_query = {
"id_token": token_data.id_token,
"access_token": token_data.access_token,
"refresh_token": token_data.refresh_token,
"exchanged_access_token": exchanged_access_token,
"org_id": org_id,
"project_id": project_id,
"plan_type": chatgpt_plan_type,
"platform_url": "https://platform.openai.com",
}
success_url = f"{URL_BASE}/success?{urllib.parse.urlencode(success_url_query)}"
return exchanged_access_token, success_url
def persist_auth(self, bundle: AuthBundle) -> bool:
auth_json_contents = {
"OPENAI_API_KEY": bundle.api_key,
"tokens": {
"id_token": bundle.token_data.id_token,
"access_token": bundle.token_data.access_token,
"refresh_token": bundle.token_data.refresh_token,
"account_id": bundle.token_data.account_id,
},
"last_refresh": bundle.last_refresh,
}
return write_auth_file(auth_json_contents)
class OAuthHandler(http.server.BaseHTTPRequestHandler):
server: "OAuthHTTPServer"
def do_GET(self) -> None:
path = urllib.parse.urlparse(self.path).path
if path == "/success":
self._send_html(LOGIN_SUCCESS_HTML)
try:
self.wfile.flush()
except Exception as e:
eprint(f"Failed to flush response: {e}")
self._shutdown_after_delay(2.0)
return
if path != "/auth/callback":
self.send_error(404, "Not Found")
self._shutdown()
return
query = urllib.parse.urlparse(self.path).query
params = urllib.parse.parse_qs(query)
code = params.get("code", [None])[0]
if not code:
self.send_error(400, "Missing auth code")
self._shutdown()
return
try:
auth_bundle, success_url = self._exchange_code(code)
except Exception as exc:
self.send_error(500, f"Token exchange failed: {exc}")
self._shutdown()
return
auth_json_contents = {
"OPENAI_API_KEY": auth_bundle.api_key,
"tokens": {
"id_token": auth_bundle.token_data.id_token,
"access_token": auth_bundle.token_data.access_token,
"refresh_token": auth_bundle.token_data.refresh_token,
"account_id": auth_bundle.token_data.account_id,
},
"last_refresh": auth_bundle.last_refresh,
}
if write_auth_file(auth_json_contents):
self.server.exit_code = 0
self._send_html(LOGIN_SUCCESS_HTML)
else:
self.send_error(500, "Unable to persist auth file")
self._shutdown_after_delay(2.0)
def do_POST(self) -> None:
self.send_error(404, "Not Found")
self._shutdown()
def log_message(self, fmt: str, *args):
if getattr(self.server, "verbose", False):
super().log_message(fmt, *args)
def _send_redirect(self, url: str) -> None:
self.send_response(302)
self.send_header("Location", url)
self.end_headers()
def _send_html(self, body: str) -> None:
encoded = body.encode()
self.send_response(200)
self.send_header("Content-Type", "text/html; charset=utf-8")
self.send_header("Content-Length", str(len(encoded)))
self.end_headers()
self.wfile.write(encoded)
def _shutdown(self) -> None:
threading.Thread(target=self.server.shutdown, daemon=True).start()
def _shutdown_after_delay(self, seconds: float = 2.0) -> None:
def _later():
try:
time.sleep(seconds)
finally:
self._shutdown()
threading.Thread(target=_later, daemon=True).start()
def _exchange_code(self, code: str) -> Tuple[AuthBundle, str]:
return self.server.exchange_code(code)
def _maybe_obtain_api_key(
self,
token_claims: Dict[str, Any],
access_claims: Dict[str, Any],
token_data: TokenData,
) -> Tuple[str | None, str | None]:
org_id = token_claims.get("organization_id")
project_id = token_claims.get("project_id")
if not org_id or not project_id:
query = {
"id_token": token_data.id_token,
"needs_setup": "false",
"org_id": org_id or "",
"project_id": project_id or "",
"plan_type": access_claims.get("chatgpt_plan_type"),
"platform_url": "https://platform.openai.com",
}
return None, f"{URL_BASE}/success?{urllib.parse.urlencode(query)}"
today = datetime.datetime.now(datetime.timezone.utc).strftime("%Y-%m-%d")
exchange_data = urllib.parse.urlencode(
{
"grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
"client_id": self.server.client_id,
"requested_token": "openai-api-key",
"subject_token": token_data.id_token,
"subject_token_type": "urn:ietf:params:oauth:token-type:id_token",
"name": f"ChatMock [auto-generated] ({today})",
}
).encode()
with urllib.request.urlopen(
urllib.request.Request(
self.server.token_endpoint,
data=exchange_data,
method="POST",
headers={"Content-Type": "application/x-www-form-urlencoded"},
),
context=_SSL_CONTEXT,
) as resp:
exchange_payload = json.loads(resp.read().decode())
exchanged_access_token = exchange_payload.get("access_token")
chatgpt_plan_type = access_claims.get("chatgpt_plan_type")
success_url_query = {
"id_token": token_data.id_token,
"needs_setup": "false",
"org_id": org_id,
"project_id": project_id,
"plan_type": chatgpt_plan_type,
"platform_url": "https://platform.openai.com",
}
success_url = f"{URL_BASE}/success?{urllib.parse.urlencode(success_url_query)}"
return exchanged_access_token, success_url
|