FastAPI HTTP Basic Logout demo

fastapi_http_basic_logout.py

from fastapi import Depends, FastAPI, status
from fastapi.responses import HTMLResponse
from fastapi.security import HTTPBasic, HTTPBasicCredentials

app = FastAPI()
security = HTTPBasic()

HTML = """
<center>
    <h1>Hello {username}</h1>
    <form method="POST" action="/">
        <input type="submit" value="Log Out">
    </form>
</center>
"""

LOGOUT_HTML = """
<center>
    <h1>Hello User</h1>
    <a href="/"><button>Log In</button></a>
</center>
"""


@app.get("/")
async def root(creds: HTTPBasicCredentials = Depends(security)):
    return HTMLResponse(content=HTML.format(username=creds.username))


@app.post("/")
async def logout():
    return HTMLResponse(content=LOGOUT_HTML, status_code=status.HTTP_401_UNAUTHORIZED)