错误：redirect_uri_mismatch :: redirect_uri必须匹配注册的回调URL(error : redirect_uri_mismatch :: The redirect_uri MUST match the registered callback URL)

 所以我正在尝试使用Github OAuth API在Flask中学习OAuth，并且我正在使用flask_dance库。 我能够在Github上对自己进行身份验证，然后返回到我的应用程序，但显示404 Not Found Error和url中的http://localhost:5000/login/authorized?error=redirect_uri_mismatch&error_description=The+redirect_uri+MUST+match+the+registered+callback+URL+for+this+application... ，回调网址似乎是正确的，因为它是我在github上给出的，但仍然显示redirect_uri mismatch 。 我在这里阅读文档，并知道我们可以从请求中删除redirect_uri参数，但我不知道该怎么做。 （我在Windows 10上） 
 你能帮忙的话，我会很高兴。 谢谢。 
 
  
 
 App.py 
 
from flask import Flask, redirect, url_for
from werkzeug.contrib.fixers import ProxyFix
from flask_dance.contrib.github import make_github_blueprint, github

app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app)
app.secret_key = "supersekrit"
blueprint = make_github_blueprint(
    client_id="xxxxxxxxx",
    client_secret="xxxxxxxx",
)
app.register_blueprint(blueprint, url_prefix="/login")

@app.route("/signup")
def index():
    if not github.authorized:
        return redirect(url_for("github.login"))
    resp = github.get("/user")
    assert resp.ok
    return "You are @{login} on GitHub".format(login=resp.json()["login"])

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

So I am trying to learn OAuth in Flask using Github OAuth API and I am using flask_dance library for it. I am able to authenticate myself on Github and return back to my app but in its showing 404 Not Found Error and in the url its http://localhost:5000/login/authorized?error=redirect_uri_mismatch&error_description=The+redirect_uri+MUST+match+the+registered+callback+URL+for+this+application... , The callback url seems correct as it is what I gave on github but still its showing redirect_uri mismatch . I was reading the documentation here and got to know that we can remove redirect_uri parameter from the request but I am not sure how to do that. ( and I am on Windows 10 )
 Any help would be nice. Thanks.
 
 
App.py
 
from flask import Flask, redirect, url_for
from werkzeug.contrib.fixers import ProxyFix
from flask_dance.contrib.github import make_github_blueprint, github

app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app)
app.secret_key = "supersekrit"
blueprint = make_github_blueprint(
    client_id="xxxxxxxxx",
    client_secret="xxxxxxxx",
)
app.register_blueprint(blueprint, url_prefix="/login")

@app.route("/signup")
def index():
    if not github.authorized:
        return redirect(url_for("github.login"))
    resp = github.get("/user")
    assert resp.ok
    return "You are @{login} on GitHub".format(login=resp.json()["login"])

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

原文：https://stackoverflow.com/questions/49592599