# Starlette Integration

Starlette is a lightweight ASGI framework/toolkit, which is ideal for building high performance asyncio services.

This documentation covers OAuth 1.0 Client support for Starlette. Because all the frameworks integrations share the same API, it is best to:

Read Web Clients at first.

The difference between Starlette and Flask/Django integrations is Starlette is async. We will use `await` for the functions we need to call. But first, let’s create an `OAuth` instance:

    from authlib.integrations.starlette_client import OAuth

    oauth = OAuth()

Unlike Flask and Django, Starlette OAuth registry uses HTTPX `AsyncOAuth1Client` as the OAuth 1.0 backend.

## Enable Session for OAuth 1.0

With OAuth 1.0, we need to use a temporary credential to exchange for an access token. This temporary credential is created before redirecting to the provider (Twitter), and needs to be saved somewhere in order to use it later.

With OAuth 1, the Starlette client will save the request token in sessions. To enable this, we need to add the `SessionMiddleware` middleware to the application, which requires the installation of the `itsdangerous` package:

    from starlette.applications import Starlette
    from starlette.middleware.sessions import SessionMiddleware

    app = Starlette()
    app.add_middleware(SessionMiddleware, secret_key="some-random-string")

However, using the `SessionMiddleware` will store the temporary credential as a secure cookie which will expose your request token to the client.

## Routes for Authorization

Just like the examples in Web Clients, but Starlette is async, the routes for authorization should look like:

    @app.route('/login/twitter')
    async def login_via_twitter(request):
        twitter = oauth.create_client('twitter')
        redirect_uri = request.url_for('authorize_twitter')
        return await twitter.authorize_redirect(request, redirect_uri)

    @app.route('/auth/twitter')
    async def authorize_twitter(request):
        twitter = oauth.create_client('twitter')
        token = await twitter.authorize_access_token(request)
        resp = await twitter.get('account/verify_credentials.json')
        profile = resp.json()
        # do something with the token and profile
        return '...'

## Examples

We have Starlette demos at https://github.com/authlib/demo-oauth-client

1. OAuth 1.0: Starlette Twitter login