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import os
import json
import time
import asyncio
import uuid
from typing import Optional, Dict, Union
from .stubs import IQwenOAuth2Client, ErrorDataDict
from pathlib import Path
import threading
from ..base_provider import AuthFileMixin
from ... import debug
QWEN_DIR = ".qwen"
QWEN_CREDENTIAL_FILENAME = "oauth_creds.json"
QWEN_LOCK_FILENAME = "oauth_creds.lock"
TOKEN_REFRESH_BUFFER_MS = 30 * 1000
LOCK_TIMEOUT_MS = 10000
CACHE_CHECK_INTERVAL_MS = 1000
def isErrorResponse(
response: Union[Dict, ErrorDataDict]
) -> bool:
return "error" in response
class TokenError:
REFRESH_FAILED = "REFRESH_FAILED"
NO_REFRESH_TOKEN = "NO_REFRESH_TOKEN"
LOCK_TIMEOUT = "LOCK_TIMEOUT"
FILE_ACCESS_ERROR = "FILE_ACCESS_ERROR"
NETWORK_ERROR = "NETWORK_ERROR"
class TokenManagerError(Exception):
def __init__(self, type_: str, message: str, original_error: Optional[Exception] = None):
super().__init__(message)
self.type = type_
self.original_error = original_error
class SharedTokenManager(AuthFileMixin):
parent = "QwenCode"
_instance: Optional["SharedTokenManager"] = None
_lock = threading.Lock()
def __init__(self):
self.memory_cache = {
"credentials": None,
"file_mod_time": 0,
"last_check": 0,
}
self.refresh_promise = None
@classmethod
def getInstance(cls):
with cls._lock:
if cls._instance is None:
cls._instance = cls()
return cls._instance
def getCredentialFilePath(self):
path = Path(os.path.expanduser(f"~/{QWEN_DIR}/{QWEN_CREDENTIAL_FILENAME}"))
if path.is_file():
return path
return SharedTokenManager.get_cache_file()
def getLockFilePath(self):
return Path(os.path.expanduser(f"~/{QWEN_DIR}/{QWEN_LOCK_FILENAME}"))
def setLockConfig(self, config: dict):
# Optional: allow lock config override
pass
def registerCleanupHandlers(self):
import atexit
def cleanup():
try:
lock_path = self.getLockFilePath()
lock_path.unlink()
except:
pass
atexit.register(cleanup)
async def getValidCredentials(self, qwen_client: IQwenOAuth2Client, force_refresh: bool = False):
try:
self.checkAndReloadIfNeeded()
if (
self.memory_cache["credentials"]
and not force_refresh
and self.isTokenValid(self.memory_cache["credentials"])
):
return self.memory_cache["credentials"]
if self.refresh_promise:
return await self.refresh_promise
self.refresh_promise = asyncio.create_task(self.performTokenRefresh(qwen_client, force_refresh))
credentials = await self.refresh_promise
self.refresh_promise = None
return credentials
except Exception as e:
if isinstance(e, TokenManagerError):
raise
raise TokenManagerError(TokenError.REFRESH_FAILED, str(e), e) from e
def checkAndReloadIfNeeded(self):
now = int(time.time() * 1000)
if now - self.memory_cache["last_check"] < CACHE_CHECK_INTERVAL_MS:
return
self.memory_cache["last_check"] = now
try:
file_path = self.getCredentialFilePath()
stat = file_path.stat()
file_mod_time = int(stat.st_mtime * 1000)
if file_mod_time > self.memory_cache["file_mod_time"]:
self.reloadCredentialsFromFile()
self.memory_cache["file_mod_time"] = file_mod_time
except FileNotFoundError:
self.memory_cache["file_mod_time"] = 0
except Exception as e:
self.memory_cache["credentials"] = None
raise TokenManagerError(TokenError.FILE_ACCESS_ERROR, str(e), e)
def reloadCredentialsFromFile(self):
file_path = self.getCredentialFilePath()
debug.log(f"Reloading credentials from {file_path}")
try:
with open(file_path, "r") as fs:
data = json.load(fs)
credentials = self.validateCredentials(data)
self.memory_cache["credentials"] = credentials
except FileNotFoundError as e:
self.memory_cache["credentials"] = None
raise TokenManagerError(TokenError.FILE_ACCESS_ERROR, "Credentials file not found", e) from e
except json.JSONDecodeError as e:
self.memory_cache["credentials"] = None
raise TokenManagerError(TokenError.FILE_ACCESS_ERROR, "Invalid JSON format", e) from e
except Exception as e:
self.memory_cache["credentials"] = None
raise TokenManagerError(TokenError.FILE_ACCESS_ERROR, str(e), e) from e
def validateCredentials(self, data):
if not data or not isinstance(data, dict):
raise ValueError("Invalid credentials format")
for field in ["access_token", "refresh_token", "token_type"]:
if field not in data or not isinstance(data[field], str):
raise ValueError(f"Invalid credentials: missing {field}")
if "expiry_date" not in data or not isinstance(data["expiry_date"], (int, float)):
raise ValueError("Invalid credentials: missing expiry_date")
return data
async def performTokenRefresh(self, qwen_client: IQwenOAuth2Client, force_refresh: bool):
lock_path = self.getLockFilePath()
try:
if self.memory_cache["credentials"] is None:
self.reloadCredentialsFromFile()
qwen_client.setCredentials(self.memory_cache["credentials"])
current_credentials = qwen_client.getCredentials()
if not current_credentials.get("refresh_token"):
raise TokenManagerError(TokenError.NO_REFRESH_TOKEN, "No refresh token")
await self.acquireLock(lock_path)
self.checkAndReloadIfNeeded()
if (
not force_refresh
and self.memory_cache["credentials"]
and self.isTokenValid(self.memory_cache["credentials"])
):
qwen_client.setCredentials(self.memory_cache["credentials"])
return self.memory_cache["credentials"]
response = await qwen_client.refreshAccessToken()
if not response or isErrorResponse(response):
raise TokenManagerError(TokenError.REFRESH_FAILED, str(response))
token_data = response
if "access_token" not in token_data:
raise TokenManagerError(TokenError.REFRESH_FAILED, "No access_token returned")
credentials = {
"access_token": token_data["access_token"],
"token_type": token_data["token_type"],
"refresh_token": token_data.get("refresh_token", current_credentials.get("refresh_token")),
"resource_url": token_data.get("resource_url"),
"expiry_date": int(time.time() * 1000) + token_data.get("expires_in", 0) * 1000,
}
self.memory_cache["credentials"] = credentials
qwen_client.setCredentials(credentials)
await self.saveCredentialsToFile(credentials)
return credentials
except Exception as e:
if isinstance(e, TokenManagerError):
raise
raise
finally:
await self.releaseLock(lock_path)
async def acquireLock(self, lock_path: Path):
max_attempts = 50
attempt_interval = 200 # ms
lock_id = str(uuid.uuid4())
os.makedirs(lock_path.parent, exist_ok=True)
for _ in range(max_attempts):
try:
with open(lock_path, "w") as f:
f.write(lock_id)
return
except:
try:
stat = os.stat(str(lock_path))
lock_age = int(time.time() * 1000) - int(stat.st_mtime * 1000)
if lock_age > LOCK_TIMEOUT_MS:
try:
await os.unlink(str(lock_path))
except:
pass
except:
pass
await asyncio.sleep(attempt_interval / 1000)
raise TokenManagerError(TokenError.LOCK_TIMEOUT, "Failed to acquire lock")
async def releaseLock(self, lock_path: Path):
try:
await os.unlink(str(lock_path))
except:
pass
async def saveCredentialsToFile(self, credentials: dict):
file_path = self.getCredentialFilePath()
os.makedirs(file_path.parent, exist_ok=True)
with open(file_path, "w") as f:
f.write(json.dumps(credentials, indent=2))
stat = os.stat(str(file_path))
self.memory_cache["file_mod_time"] = int(stat.st_mtime * 1000)
def isTokenValid(self, credentials: dict) -> bool:
expiry_date = credentials.get("expiry_date")
if not expiry_date:
return False
return time.time() * 1000 < expiry_date - TOKEN_REFRESH_BUFFER_MS
def getCurrentCredentials(self):
return self.memory_cache["credentials"]
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