Request.Get and Async/Await

Question

function getPageT()
{
    Request.get({url: "https://cardanoexplorer.com/api/blocks/pages/total"}, (error, response, body) => {
        if (error) {
            return console.dir(error);
        }
        body = JSON.parse(body)
        var total = body.Right

        return Promise.resolve(total)
    });
}

async function assign() {
    var t = await getPageT()
    console.log(t)
}

I would like the code above to print the total value but it comes as undefined because the getPage function does not wait for the request to be resolved.

How can I get the promise out of the Request.get ?

getPageT isn't returning a Promise, it isn't returning anything actually. — Morphyish, Aug 03 '19 at 20:29
how about now? even returning a Promise it doesn't give me the total variable — user3755529, Aug 03 '19 at 20:31
The return statement is still in the callback, not in the actual function — Morphyish, Aug 03 '19 at 20:32
but if I take it outside the Request it will not wait for the Request to get resolved — user3755529, Aug 03 '19 at 20:33

Morphyish · Accepted Answer · 2019-08-04T13:22:31.233

1

Your function need to return a promise if you want the await keyword to actually wait for something to happen:

function getPageT()
{
    return new Promise(function(resolve, reject) {
        Request.get({url: "https://cardanoexplorer.com/api/blocks/pages/total"}, (error, response, body) => {
            if (error) {
                console.dir(error)
                reject(error);
            }
            body = JSON.parse(body)
            var total = body.Right

            return resolve(total)
        });
    });
}

async function assign() {
    var t = await getPageT()
    console.log(t)
}

edited Aug 04 '19 at 13:22

answered Aug 03 '19 at 20:36

Morphyish

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the Request.get() doesn't return anything? I was getting confused that it was giving a promise in some way? – user3755529 Aug 03 '19 at 20:39
The `reject()` is unreachable – charlietfl Aug 03 '19 at 20:41
@user3755529 `Request.get` might return something but you need an actual `return` statement inside your own function. Without it `Request.get` will return *something* but you never do anything with the result and discard it. It's the same as doing `function foo() { 2 + 2 }` vs `function foo() { return 2 + 2 }` – VLAZ Aug 03 '19 at 20:43
@charlietfl you're right as usual, I made the correction. Thanks for the input ! – Morphyish Aug 03 '19 at 20:44
getPagetT() should be getPageT() – user3755529 Aug 04 '19 at 13:01
@user3755529 good catch, thanks ! – Morphyish Aug 04 '19 at 13:23

Request.Get and Async/Await

1 Answers1