update app/database.py

app/database.py

@@ -0,0 +1,57 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase
+from sqlalchemy import create_engine
+import os
+
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite+aiosqlite:///./data/1proxy.db")
+
+# Auto-create data directory for SQLite if it doesn't exist
+if "sqlite" in DATABASE_URL and "./data/" in DATABASE_URL:
+    os.makedirs("./data", exist_ok=True)
+
+# Configure connection pooling for production performance
+engine_kwargs = {
+    "echo": False,
+    "future": True,
+}
+
+# SQLite doesn't support connection pooling, only add pool settings for PostgreSQL
+if DATABASE_URL.startswith("postgresql"):
+    engine_kwargs.update(
+        {
+            "pool_size": 20,  # Number of permanent connections
+            "max_overflow": 30,  # Additional connections beyond pool_size
+            "pool_pre_ping": True,  # Verify connections before using
+            "pool_recycle": 3600,  # Recycle connections after 1 hour
+            "pool_timeout": 30,  # Wait max 30s for connection from pool
+        }
+    )
+
+engine = create_async_engine(DATABASE_URL, **engine_kwargs)
+
+AsyncSessionLocal = async_sessionmaker(
+    engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db():
+    async with AsyncSessionLocal() as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise
+        finally:
+            await session.close()
+
+
+async def init_db():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)