LibreTranslate/app/api_keys.py

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import sqlite3
import uuid
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import requests
from expiringdict import ExpiringDict
DEFAULT_DB_PATH = "api_keys.db"
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class Database:
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def __init__(self, db_path=DEFAULT_DB_PATH, max_cache_len=1000, max_cache_age=30):
self.db_path = db_path
self.cache = ExpiringDict(max_len=max_cache_len, max_age_seconds=max_cache_age)
# Make sure to do data synchronization on writes!
self.c = sqlite3.connect(db_path, check_same_thread=False)
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self.c.execute(
"""CREATE TABLE IF NOT EXISTS api_keys (
"api_key" TEXT NOT NULL,
"req_limit" INTEGER NOT NULL,
PRIMARY KEY("api_key")
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);"""
)
def lookup(self, api_key):
req_limit = self.cache.get(api_key)
if req_limit is None:
# DB Lookup
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stmt = self.c.execute(
"SELECT req_limit FROM api_keys WHERE api_key = ?", (api_key,)
)
row = stmt.fetchone()
if row is not None:
self.cache[api_key] = row[0]
req_limit = row[0]
else:
self.cache[api_key] = False
req_limit = False
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if isinstance(req_limit, bool):
req_limit = None
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return req_limit
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def add(self, req_limit, api_key="auto"):
if api_key == "auto":
api_key = str(uuid.uuid4())
self.remove(api_key)
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self.c.execute(
"INSERT INTO api_keys (api_key, req_limit) VALUES (?, ?)",
(api_key, req_limit),
)
self.c.commit()
return (api_key, req_limit)
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def remove(self, api_key):
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self.c.execute("DELETE FROM api_keys WHERE api_key = ?", (api_key,))
self.c.commit()
return api_key
def all(self):
row = self.c.execute("SELECT api_key, req_limit FROM api_keys")
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return row.fetchall()
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class RemoteDatabase:
def __init__(self, url, max_cache_len=1000, max_cache_age=600):
self.url = url
self.cache = ExpiringDict(max_len=max_cache_len, max_age_seconds=max_cache_age)
def lookup(self, api_key):
req_limit = self.cache.get(api_key)
if req_limit is None:
try:
r = requests.post(self.url, data={'api_key': api_key})
res = r.json()
except Exception as e:
print("Cannot authenticate API key: " + str(e))
return None
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if res.get('error', None) is None:
req_limit = res.get('req_limit', None)
else:
req_limit = None
self.cache[api_key] = req_limit
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return req_limit