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import json
import os
import time
from pathlib import Path
import httpx
OAUTH_CLIENT_ID = "681255809395-oo8ft2oprdrnp9e3aqf6av3hmdib135j.apps.googleusercontent.com"
OAUTH_CLIENT_SECRET = "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"
TOKEN_URL = "https://oauth2.googleapis.com/token"
DEFAULT_CREDS_PATH = Path.home() / ".gemini" / "oauth_creds.json"
class OAuthCredentials:
"""
Resolves credentials in priority order:
1. Environment variables (GEMINI_REFRESH_TOKEN, GEMINI_ACCESS_TOKEN, GEMINI_TOKEN_EXPIRY)
2. Credentials file (path argument or ~/.gemini/oauth_creds.json)
"""
def __init__(self, creds_path: str | None = None):
self._path = Path(creds_path) if creds_path else DEFAULT_CREDS_PATH
self._data: dict = {}
self._from_env = False
self._load()
def _load(self):
refresh = os.environ.get("GEMINI_REFRESH_TOKEN")
if refresh:
self._from_env = True
self._data = {
"refresh_token": refresh,
"access_token": os.environ.get("GEMINI_ACCESS_TOKEN", ""),
"expiry_date": int(os.environ.get("GEMINI_TOKEN_EXPIRY", "0")),
}
return
if self._path.exists():
self._data = json.loads(self._path.read_text())
def _save(self):
# Don't write back when credentials came from env vars
if self._from_env:
return
self._path.parent.mkdir(parents=True, exist_ok=True)
self._path.write_text(json.dumps(self._data, indent=2))
os.chmod(self._path, 0o600)
@property
def refresh_token(self) -> str | None:
return self._data.get("refresh_token")
@property
def access_token(self) -> str | None:
return self._data.get("access_token")
@property
def expiry_ms(self) -> int:
return self._data.get("expiry_date", 0)
def is_expired(self) -> bool:
if not self.access_token:
return True
return time.time() * 1000 >= (self.expiry_ms - 300_000)
async def get_valid_token(self, client: httpx.AsyncClient) -> str:
if self.is_expired():
await self._refresh(client)
return self.access_token or ""
async def _refresh(self, client: httpx.AsyncClient):
if not self.refresh_token:
raise ValueError(
"No refresh token found. Set GEMINI_REFRESH_TOKEN or provide a credentials file.\n"
"Obtain it by running: gemini (and completing the login flow)"
)
resp = await client.post(
TOKEN_URL,
data={
"refresh_token": self.refresh_token,
"client_id": OAUTH_CLIENT_ID,
"client_secret": OAUTH_CLIENT_SECRET,
"grant_type": "refresh_token",
},
)
resp.raise_for_status()
tokens = resp.json()
self._data.update(tokens)
if "expires_in" in tokens:
self._data["expiry_date"] = int((time.time() + tokens["expires_in"]) * 1000)
self._save()
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