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JavaScript

Posted by Sam Lillicrap
Sam Lillicrap
12,127 Points

How to redirect in node.js without express? (In callback)

How do you redirect to a new page in node.js without express? I want to do it after some routing has been done, so a 'blocking' redirect, if you like. Here's a snippet to help you understand

function finishAuthRoute(request, response) {
    if(request.url === "/finish_auth"){
        var Shopify = new shopifyAPI({
                shop: storeType + ".myshopify.com", // MYSHOP.myshopify.com
                shopify_api_key: 'mykeyishere', // Your API key
                shopify_shared_secret: 'mysecretishere', // Your Shared Secret
                shopify_scope: 'read_content, write_content, read_customers, write_customers, read_orders, write_orders',
                redirect_uri: redirect_uri_type
            }); 
            // Exchange temporary token for permanent one   
        var query_params = request.query;
        Shopify.exchange_temporary_token(query_params, function(err, data) {
            console.log('The permanent key is: ' + data['access_token']);
        });
        // Redirect back to app (this doesn't work)
        response.writeHead(302, {Location: storeType + ".myshopify.com/admin/apps"});
        response.end(console.log('Redirecting to Shopify Admin') + '\n');
    }
}

So where it says redirect back to app, in comments - I want it to redirect back after it's processed the above code. Any ideas?

If I could put response.writeHead(302, {Location: storeType + ".myshopify.com/admin/apps"}); inside of response.timeOut maybe I'd have luck...

Cheers in advance

2 Answers

Andrew Chalkley
STAFF
Andrew Chalkley
Treehouse Guest Teacher
Andrew Chalkley
Andrew Chalkley
Treehouse Guest Teacher 
var http = require("http");

http.createServer(function(request, response){
    response.writeHead(302,  {Location: "http://teamtreehouse.com"})
    response.end();
}).listen(3030);

This is the simplest code that works...

Is storeType doing a full url with http:// or https://?

Sam Lillicrap
Sam Lillicrap
12,127 Points

storeType doesn't have any prefix, so I've since added that in! I ended up converting my node.js code to express and using .redirect(); which works like a charm!

At the time I was still confused whether response.writeHead(302, {Location: "http://teamtreehouse.com"}) would execute before the rest of the code, or after it had been completed - so I thought I needed to somehow put that code in a timeout function!

Andrew Chalkley
Andrew Chalkley
Treehouse Guest Teacher
Andrew Chalkley
Andrew Chalkley
Treehouse Guest Teacher

If something has a callback it's an asynchronous function and you can write your response in it.

If there's not option for a callback, the code is synchronous and sequential.

James Bradd
James Bradd
4,597 Points
James Bradd
James Bradd
4,597 Points

I might be wrong but I think Location needs to be in ' '?

James Bradd
James Bradd
4,597 Points

Here is the thread I was using for reference

Sam Lillicrap
Sam Lillicrap
12,127 Points

It doesn't make a difference - although I have added it in, nothing changes! :-(

James Bradd
James Bradd
4,597 Points

Shoot, was hoping that was it. Is there a reason the + '/n' is out side of your console.log() block?

Sam Lillicrap
Sam Lillicrap
12,127 Points

my understanding, and I could be wrong, is that you need '\n' at the end of a response.somethingHere to return it

Edit: this isn't correct '\n' puts it on a new line in the log/file

James Bradd
James Bradd
4,597 Points

I might be wrong because I rarely use node without express but I don't think you need it. It just means "new line" I believe