DAN-5 OAuth Backend (#17)

Also added in an exception handler for logging

backend/alembic/versions/2666d766cb9b_google_oauth2.py

@@ -0,0 +1,55 @@
+"""Google OAuth2
+
+Revision ID: 2666d766cb9b
+Revises: 6d387b3196c2
+Create Date: 2023-05-05 15:49:35.716016
+
+"""
+import fastapi_users_db_sqlalchemy
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "2666d766cb9b"
+down_revision = "6d387b3196c2"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "oauth_account",
+        sa.Column("id", fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+        sa.Column(
+            "user_id",
+            fastapi_users_db_sqlalchemy.generics.GUID(),
+            nullable=False,
+        ),
+        sa.Column("oauth_name", sa.String(length=100), nullable=False),
+        sa.Column("access_token", sa.String(length=1024), nullable=False),
+        sa.Column("expires_at", sa.Integer(), nullable=True),
+        sa.Column("refresh_token", sa.String(length=1024), nullable=True),
+        sa.Column("account_id", sa.String(length=320), nullable=False),
+        sa.Column("account_email", sa.String(length=320), nullable=False),
+        sa.ForeignKeyConstraint(["user_id"], ["user.id"], ondelete="cascade"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(
+        op.f("ix_oauth_account_account_id"),
+        "oauth_account",
+        ["account_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_oauth_account_oauth_name"),
+        "oauth_account",
+        ["oauth_name"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_oauth_account_oauth_name"), table_name="oauth_account")
+    op.drop_index(op.f("ix_oauth_account_account_id"), table_name="oauth_account")
+    op.drop_table("oauth_account")

backend/danswer/auth/configs.py

@@ -1,7 +1,8 @@
 import os
 
-RESET_PASSWORD_TOKEN_SECRET = os.environ["RESET_PASSWORD_TOKEN_SECRET"]
-RESET_PASSWORD_VERIFICATION_TOKEN_SECRET = os.environ[
-    "RESET_PASSWORD_VERIFICATION_TOKEN_SECRET"
-]
+SECRET = os.environ.get("SECRET", "")
 SESSION_EXPIRE_TIME_SECONDS = int(os.environ.get("SESSION_EXPIRE_TIME_SECONDS", 3600))
+
+ENABLE_OAUTH = os.environ.get("ENABLE_OAUTH", "False").lower() != "false"
+GOOGLE_OAUTH_CLIENT_ID = os.environ.get("GOOGLE_OAUTH_CLIENT_ID", "")
+GOOGLE_OAUTH_CLIENT_SECRET = os.environ.get("GOOGLE_OAUTH_CLIENT_SECRET", "")

backend/danswer/auth/users.py

@@ -1,8 +1,9 @@
 import uuid
 from typing import Optional
 
-from danswer.auth.configs import RESET_PASSWORD_TOKEN_SECRET
-from danswer.auth.configs import RESET_PASSWORD_VERIFICATION_TOKEN_SECRET
+from danswer.auth.configs import GOOGLE_OAUTH_CLIENT_ID
+from danswer.auth.configs import GOOGLE_OAUTH_CLIENT_SECRET
+from danswer.auth.configs import SECRET
 from danswer.auth.configs import SESSION_EXPIRE_TIME_SECONDS
 from danswer.db.auth import get_access_token_db
 from danswer.db.auth import get_user_db
@@ -18,11 +19,12 @@ from fastapi_users.authentication import CookieTransport
 from fastapi_users.authentication.strategy.db import AccessTokenDatabase
 from fastapi_users.authentication.strategy.db import DatabaseStrategy
 from fastapi_users.db import SQLAlchemyUserDatabase
+from httpx_oauth.clients.google import GoogleOAuth2
 
 
 class UserManager(UUIDIDMixin, BaseUserManager[User, uuid.UUID]):
-    reset_password_token_secret = RESET_PASSWORD_TOKEN_SECRET
-    verification_token_secret = RESET_PASSWORD_VERIFICATION_TOKEN_SECRET
+    reset_password_token_secret = SECRET
+    verification_token_secret = SECRET
 
     async def on_after_register(self, user: User, request: Optional[Request] = None):
         print(f"User {user.id} has registered.")
@@ -59,6 +61,8 @@ auth_backend = AuthenticationBackend(
     get_strategy=get_database_strategy,
 )
 
+google_oauth_client = GoogleOAuth2(GOOGLE_OAUTH_CLIENT_ID, GOOGLE_OAUTH_CLIENT_SECRET)
+
 fastapi_users = FastAPIUsers[User, uuid.UUID](get_user_manager, [auth_backend])
 
 current_active_user = fastapi_users.current_user(active=True)

backend/danswer/db/auth.py

@@ -2,6 +2,7 @@ from collections.abc import AsyncGenerator
 
 from danswer.db.engine import build_async_engine
 from danswer.db.models import AccessToken
+from danswer.db.models import OAuthAccount
 from danswer.db.models import User
 from fastapi import Depends
 from fastapi_users.db import SQLAlchemyUserDatabase
@@ -17,7 +18,7 @@ async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
 
 
 async def get_user_db(session: AsyncSession = Depends(get_async_session)):
-    yield SQLAlchemyUserDatabase(session, User)
+    yield SQLAlchemyUserDatabase(session, User, OAuthAccount)
 
 
 async def get_access_token_db(

backend/danswer/db/models.py

@@ -1,9 +1,11 @@
 import datetime
 from enum import Enum as PyEnum
 from typing import Any
+from typing import List
 
 from danswer.configs.constants import DocumentSource
 from danswer.connectors.models import InputType
+from fastapi_users.db import SQLAlchemyBaseOAuthAccountTableUUID
 from fastapi_users.db import SQLAlchemyBaseUserTableUUID
 from fastapi_users_db_sqlalchemy.access_token import SQLAlchemyBaseAccessTokenTableUUID
 from sqlalchemy import DateTime
@@ -14,13 +16,21 @@ from sqlalchemy.dialects import postgresql
 from sqlalchemy.orm import DeclarativeBase
 from sqlalchemy.orm import Mapped
 from sqlalchemy.orm import mapped_column
+from sqlalchemy.orm import relationship
 
 
 class Base(DeclarativeBase):
     pass
 
 
+class OAuthAccount(SQLAlchemyBaseOAuthAccountTableUUID, Base):
+    pass
+
+
 class User(SQLAlchemyBaseUserTableUUID, Base):
+    oauth_accounts: Mapped[List[OAuthAccount]] = relationship(
+        "OAuthAccount", lazy="joined"
+    )
     pass
 
 

backend/danswer/main.py

@@ -1,9 +1,12 @@
 import uvicorn
+from danswer.auth.configs import ENABLE_OAUTH
+from danswer.auth.configs import SECRET
 from danswer.auth.schemas import UserCreate
 from danswer.auth.schemas import UserRead
 from danswer.auth.schemas import UserUpdate
 from danswer.auth.users import auth_backend
 from danswer.auth.users import fastapi_users
+from danswer.auth.users import google_oauth_client
 from danswer.configs.app_configs import APP_HOST
 from danswer.configs.app_configs import APP_PORT
 from danswer.server.admin import router as admin_router
@@ -11,12 +14,22 @@ from danswer.server.event_loading import router as event_processing_router
 from danswer.server.search_backend import router as backend_router
 from danswer.utils.logging import setup_logger
 from fastapi import FastAPI
+from fastapi import Request
+from fastapi.exceptions import RequestValidationError
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
 
 
 logger = setup_logger()
 
 
+def validation_exception_handler(request: Request, exc: RequestValidationError):
+    exc_str = f"{exc}".replace("\n", " ").replace("   ", " ")
+    logger.exception(f"{request}: {exc_str}")
+    content = {"status_code": 422, "message": exc_str, "data": None}
+    return JSONResponse(content=content, status_code=422)
+
+
 def get_application() -> FastAPI:
     application = FastAPI(title="Internal Search QA Backend", debug=True, version="0.1")
     application.include_router(backend_router)
@@ -48,6 +61,31 @@ def get_application() -> FastAPI:
         prefix="/users",
         tags=["users"],
     )
+    if ENABLE_OAUTH:
+        application.include_router(
+            fastapi_users.get_oauth_router(
+                google_oauth_client,
+                auth_backend,
+                SECRET,
+                associate_by_email=True,
+                is_verified_by_default=True,
+                redirect_url="http://localhost:8080/test",  # TODO DAN-39 set this to frontend redirect
+            ),
+            prefix="/auth/google",
+            tags=["auth"],
+        )
+        application.include_router(
+            fastapi_users.get_oauth_associate_router(
+                google_oauth_client, UserRead, SECRET
+            ),
+            prefix="/auth/associate/google",
+            tags=["auth"],
+        )
+
+    application.add_exception_handler(
+        RequestValidationError, validation_exception_handler
+    )
+
     return application
 
 

backend/danswer/server/search_backend.py

@@ -17,6 +17,7 @@ from danswer.utils.clients import TSClient
 from danswer.utils.logging import setup_logger
 from fastapi import APIRouter
 from fastapi import Depends
+from fastapi import Request
 
 
 logger = setup_logger()
@@ -30,6 +31,12 @@ async def authenticated_route(user: User = Depends(current_active_user)):
     return {"message": f"Hello {user.email}!"}
 
 
+# TODO DAN-39 delete this once oauth is built out and tested
+@router.api_route("/test", methods=["GET", "POST", "PUT", "PATCH", "DELETE"])
+def test_endpoint(request: Request):
+    print(request)
+
+
 @router.get("/", response_model=ServerStatus)
 @router.get("/status", response_model=ServerStatus)
 def read_server_status():

backend/requirements/default.txt

@@ -8,6 +8,9 @@ filelock==3.12.0
 google-api-python-client==2.86.0
 google-auth-httplib2==0.1.0
 google-auth-oauthlib==1.0.0
+httpcore==0.16.3
+httpx==0.23.3
+httpx-oauth==0.11.2
 Mako==1.2.4
 openai==0.27.6
 playwright==1.32.1
@@ -16,6 +19,7 @@ PyPDF2==3.0.1
 pytest-playwright==0.3.2
 qdrant-client==1.1.0
 requests==2.28.2
+rfc3986==1.5.0
 sentence-transformers==2.2.2
 slack-sdk==3.20.2
 SQLAlchemy[mypy]==2.0.12