Flask - Redirect via javascript on successful json

Question

I am using an ajax function to verify user login and i am returning json on errors . i wanted to redirect to a particular url on successive login, but the i can only send json data from my function (eliminating the possibility of using url_for or redirect ) . so How do i dynamically get the root url so i can send it via json and then redirect via javascript. heres my route`

def logincheck():
    uname = request.form['username']
    pwd = request.form['password']
    if uname and pwd:
        this = userlogin.query.filter_by(username = uname).first()
        if this:
            if this.password == pwd:
                session['myid'] = this.uid
                return jsonify(success = ?)
            else:
                return jsonify(p_error = 'Incorrect Password')
        else:
            return jsonify(u_error = 'Incorrect Username')

Thanks.

So i ended up using location.reload() to refresh the page, since the user had been logged in. a refresh automatically redirected to the desired page/ — Rishabh Kandari
– Rishabh Kandari, Commented Aug 27, 2017 at 15:17
Something like this $.ajax({ type: "POST", url: pathname, data: data, success: function(data) { if(data.redirect) { window.location = data.redirectURL; } } in your ajax call and pass the redirectURL through flask. In flask return jsonify(data=data) where data contains redirectURL etc — 0decimal0
– 0decimal0, Commented Aug 27, 2017 at 15:23
the problem would still have been getting the root url.. since i am testing this on localhost the url would be different than the actuall production server — Rishabh Kandari
– Rishabh Kandari, Commented Aug 28, 2017 at 4:00

Suniti Yadav · Accepted Answer · 2017-08-28 11:00:59Z

1

To get base url in javascript ,

var base_url = window.location.origin;

output : "http://yoururl.com"

var host = window.location.host;

output : yoururl.com

To redirect url in javascript ,

// redirect to another page

`window.location = "http://www.yoururl.com"`;

// it has similar behavior as an HTTP redirect

window.location.replace("http://yoururl.com");

// it has similar behavior as clicking on a link

window.location.href = "http://yoururl.com";

Hope this will help you.

answered Aug 28, 2017 at 11:00

Suniti Yadav

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