url redirect in flask-login

Question

I am trying to redirect the page upon successful login but I keep running into the same issue.

My login code:

@app.route('/login/', methods = ['GET', 'POST'])
def login():
    if request.method == 'POST':
        #data = request.get_json()
        #app.logger.debug(data)
        auth = g.couch.get('_design/authentication')
        authView = ViewDefinition('_design/authentication','authentication',auth['views']['authentication']['map'])
        for row in authView():
            if request.form['username'] == row.value['username'] and request.form['password'] == row.value['password']:
                authUser = userModel.User(row.value)
                app.logger.debug(row.value)
                authUser.authenticated = True;
                flask_login.login_user(authUser,remember = True)
                next = request.args.get('next')
                return redirect(next or url_for('/protected/')) 
    return render_template('sampleLoginPage.html')

@app.route('/protected/', methods = ['GET'])
@flask_login.login_required
def protected():
    app.logger.debug("Successful Login")
    app.logger.debug(flask_login.current_user.userID)
    return Response(json.dumps({'message' : '\'You\'re logged in so you can see this page'+flask_login.current_user.username}), mimetype = 'application/json')

The html template picks up the username and password. I have a couchdb view that authenticates the user.

When i enter my login credentials, the url redirects to http://192.168.1.109:5000/login/?next=%2Fprotected%2F

I did not fully understand the documentation. Would someone be able to better explain this concept? Why am I getting this?

This is also coming up when i try to connect it to my angularjs front end.

Regards, Sunil

Hi Wombatz, Sorry for the late response. It appears that there is an issue with the front end (I am using AngularJS). The login works perfectly when I use postman or a browser. It throws this error only when I access it through the app emulator. — galeej

Hugo Kawamata Hugo Kawamata · Accepted Answer · 2017-07-15T11:56:15

I had this issue as well. When I removed @login_required from the declaration, the redirect worked as intended.

url redirect in flask-login

1 Answers