烧瓶"无法为端点'索引'"建立网址?添加装饰后

时间:2018-06-03 12:47:18

标签: python python-3.x flask

我用烧瓶写的自定义应用程序,我试图添加身份验证装饰器(d_auth),这样我就不必检查用户是否已经过身份验证或不在每个路由功能中。装饰工作正常,但问题是用户登录后url_for("index")失败。这是我的装饰器代码和index路由功能,我已经添加了装饰器:

def d_auth(func):
    wraps(func)
    def decorated(*ags, **kgs):
        #print("DECORATOR_RUNNING")
        login_valid = (flask.session.get('auth_email') != None)
        if not login_valid: 
            return redirect(url_for("login"))
        else:
            #func(*args, **kwargs)
            return func(*ags, *kgs)
            #pass
    return decorated

@app.route("/", methods=["GET", "POST"])
@d_auth
def index():
    creds = gdrive.get_gdrive_credentials(session['auth_user_id'])
    if not creds:
        info = "<h2 id='lblGAuthStatus' class='text-center text-danger'> <span class='glyphicon glyphicon-alert'></span> NOT Authenticated. <a href='/gdrive_auth'>Click here to Authenticate.</a></h2>"
    elif creds.access_token_expired:
        info = "<h2 id='lblGAuthStatus' class='text-center text-danger'> <span class='glyphicon glyphicon-alert'></span> Access Token EXPIRED. <a href='/gdrive_auth'>Click here to Authenticate.</a></h2>"
    else:
        info = "<h2 id='lblGAuthStatus' class='text-center text-success'> <span class='glyphicon glyphicon-ok'></span> Successfully Authenticated.</h2>"

    return render_template('static/index.html', info=info)

装饰者基本上做的是检查用户是否已登录(not login_valid)并将其重定向到登录页面(如果他们还没有)。这非常有效。问题是,一旦用户登录并且登录页面再次尝试将它们重定向到索引页面,就会抛出此错误:

werkzeug.routing.BuildError: Could not build url for endpoint 'index'. Did you mean 'view' instead?

以下是/login路线的代码:

@app.route("/login", methods=["GET", "POST"])
def login():
    if request.method == 'GET':
        return render_template("static/login.html")
    elif request.method == 'POST':
        email = request.form['email']
        password = request.form['password']
        conn, cursor = db.opendb()
        cursor.execute("select id, is_admin, first_name, last_name from user where email=? and password=?", (email, password))
        row = cursor.fetchone()
        if row == None:
            return render_template("static/login.html", error="Invalid Credentials")
        else:
            session['auth_user_id'] = str(row['id'])
            session['auth_email'] = email
            session['auth_first_name'] = row['first_name']
            session['auth_last_name'] = row['last_name']
            session['auth_is_admin'] = row['is_admin']
            return redirect(url_for("index"))

在最后一行,url_for("index")正在被调用,而且这是错误发生的地方。我知道我可以使用url_for("/")来解决这个问题,但是我想永久修复它,以便其他东西可能不会停止在我相对较大的代码库中工作。

1 个答案:

答案 0 :(得分:0)

我刚刚找到了问题here的答案。事实证明,我已经使用@wraps(func)包装装饰器功能,而不仅仅是wraps(func),就像我完成的那样。不知道为什么它没有抛出错误!