I am trying to use session to pass variables across view functions in fastapi. However, I do not find any doc which specifically says of about session object. Everywhere I see, cookies are used. Is there any way to convert the below flask code in fastapi? I want to keep session implementation as simple as possible.
from flask import Flask, session, render_template, request, redirect, url_for
app=Flask(__name__)
app.secret_key='asdsdfsdfs13sdf_df%&'
@app.route('/a')
def a():
session['my_var'] = '1234'
return redirect(url_for('b'))
@app.route('/b')
def b():
my_var = session.get('my_var', None)
return my_var
if __name__=='__main__':
app.run(host='0.0.0.0', port=5000, debug = True)
Take a look at Starlette's SessionMiddleware. FastAPI uses Starlette under the hood so it is compatible.
After you register SessionMiddleware, you can access Request.session, which is a dictionary.
Documentation: SessionMiddleware
An implementation in FastAPI may look like:
@app.route("/a")
async def a(request: Request) -> RedirectResponse:
request.session["my_var"] = "1234"
return RedirectResponse("/b")
@app.route("/b")
async def b(request: Request) -> PlainTextResponse:
my_var = request.session.get("my_var", None)
return PlainTextResponse(my_var)