如何从重定向的 url 中提取代码？ （OAuth 2.0，烧瓶）

Question

So the authorization request url is correct and it successfully redirects to redirect_url which is /loginAuthorized . I can plainly see that a code is added as in

http://127.0.0.1:5000/loginAuthorized/?code=SOME_CODE`

but can't grab it on the code. When I print path , it just prints loginAuthorized/ wihtout code . I can ask users to manually copy paste code from url, but it will not be convenient so want to avoid asking that.

import re
import requests
from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def main():

    # encoded url with information needed to request an authorization
    url = "https://kauth.kakao.com/oauth/authorize?client_id=MY_CLIENT_ID&redirect_uri=http%3A%2F%2F127.0.0.1%3A5000%2F%2FloginAuthorized/&response_type=code"
    return render_template('index.html', request_url=url) 

# If you authorize the service, it redirected to this url
# Catch any url that has /loginAuthorized as its base
@app.route("/loginAuthorized", defaults={"path": ""})
@app.route("/<path:path>")
def loginAuthorized(path):
    print('a')
    print(path)  # "loginAuthorized/" is printed, there is no code
    print('b')

if __name__ == "__main__":
    app.run()

Answer 1

You can use request flask module to get query params from URL

Import request using

from flask import request

Then to get code query param from URL use. request.args.get('code')