login with JWT

auth.py

@@ -1,8 +1,12 @@
 import httpx
-from fastapi import APIRouter, Request, HTTPException
+from fastapi import APIRouter, Depends, Request, HTTPException
 from fastapi.responses import RedirectResponse
 import os
 import secrets
+from auth.deps import get_current_user
+from db import SessionLocal
+from models import User
+from auth.jwt import create_access_token, create_refresh_token, decode_token
 
 router = APIRouter()
 
@@ -28,7 +32,13 @@ def login_google():
     )
 
     response = RedirectResponse(url)
-    response.set_cookie("oauth_state", state, httponly=True)
+    response.set_cookie(
+        "oauth_state",
+        state,
+        httponly=True,
+        secure=True,
+        samesite="lax"
+    )
     return response
 
 @router.get("/auth/callback")
@@ -57,10 +67,68 @@ async def auth_callback(request: Request, code: str, state: str):
             GOOGLE_USERINFO_URL,
             headers={"Authorization": f"Bearer {access_token}"},
         )
+
         user_info = user_res.json()
 
+    db = SessionLocal()
+
+    user = db.query(User).filter(User.email == user_info["email"]).first()
+
+    if not user:
+        user = User(
+            google_id=user_info["id"],
+            email=user_info["email"],
+            name=user_info["name"],
+            avatar=user_info["picture"],
+        )
+        db.add(user)
+        db.commit()
+        db.refresh(user)
+
+    db.close()
+
+    jwt_token = create_access_token({
+        "sub": user.id,
+        "email": user.email,
+    })
+    
+    refresh_token = create_refresh_token({
+        "sub": user.id,
+        "email": user.email,
+    })
+
     return {
-        "email": user_info["email"],
+        "access_token": jwt_token,
-        "name": user_info["name"],
+        "refresh_token": refresh_token,
-        "picture": user_info["picture"],
+        "token_type": "bearer",
-    }
+        "user": {
+            "email": user.email,
+            "name": user.name,
+            "avatar": user.avatar,
+        }
+    }
+    
+@router.get("/me")
+def me(user = Depends(get_current_user)):
+    return {
+        "email": user.email,
+        "name": user.name,
+        "avatar": user.avatar,
+    }
+    
+@router.post("/refresh")
+def refresh_token(refresh_token: str):
+    payload = decode_token(refresh_token)
+
+    if payload.get("type") != "refresh":
+        raise HTTPException(status_code=401)
+
+    user_id = payload.get("sub")
+
+    new_access = create_access_token({"sub": user_id})
+
+    return {"access_token": new_access}
+
+@router.post("/logout")
+def logout():
+    return {"message": "ok"}

auth/deps.py

@@ -0,0 +1,19 @@
+from fastapi import Request, HTTPException
+import jwt
+import os
+
+JWT_SECRET = os.getenv("JWT_SECRET")
+JWT_ALGORITHM = os.getenv("JWT_ALGORITHM", "HS256")
+
+
+def get_current_user(request: Request):
+    token = request.cookies.get("access_token")
+
+    if not token:
+        raise HTTPException(status_code=401, detail="Not authenticated")
+
+    try:
+        payload = jwt.decode(token, JWT_SECRET, algorithms=[JWT_ALGORITHM])
+        return payload["user_id"]
+    except:
+        raise HTTPException(status_code=401, detail="Invalid token")

auth/jwt.py

@@ -0,0 +1,53 @@
+import jwt
+from datetime import datetime, timedelta, timezone
+import os
+from fastapi import HTTPException, status
+
+JWT_SECRET = os.getenv("JWT_SECRET")
+JWT_ALGORITHM = os.getenv("JWT_ALGORITHM", "HS256")
+
+def now():
+    return datetime.now(timezone.utc)
+
+def create_access_token(data: dict):
+    payload = {
+        **data,
+        "type": "access",
+        "exp": now() + timedelta(minutes=60),
+        "iat": now(),
+    }
+    return jwt.encode(payload, JWT_SECRET, algorithm=JWT_ALGORITHM)
+
+def create_refresh_token(data: dict):
+    payload = {
+        **data,
+        "type": "refresh",
+        "exp": now() + timedelta(days=7),
+        "iat": now(),
+    }
+    return jwt.encode(payload, JWT_SECRET, algorithm=JWT_ALGORITHM)
+
+def decode_token(token: str):
+    try:
+        payload = jwt.decode(token, JWT_SECRET, algorithms=[JWT_ALGORITHM])
+        return payload
+    except jwt.ExpiredSignatureError:
+        raise HTTPException(status_code=401, detail="Token expired")
+    except jwt.InvalidTokenError:
+        raise HTTPException(status_code=401, detail="Invalid token")
+
+def verify_access_token(token: str):
+    payload = decode_token(token)
+
+    if payload.get("type") != "access":
+        raise HTTPException(status_code=401, detail="Invalid access token")
+
+    return payload
+
+def verify_refresh_token(token: str):
+    payload = decode_token(token)
+
+    if payload.get("type") != "refresh":
+        raise HTTPException(status_code=401, detail="Invalid refresh token")
+
+    return payload

main.py

@@ -1,5 +1,9 @@
 from fastapi import FastAPI
 from auth import router as auth_router
+from models import Base
+from db import engine
+
+Base.metadata.create_all(bind=engine)
 
 app = FastAPI()