Why is my Not Found page popping up?

Question

Node.js

I keep getting the Not Found error.

const Koa = require('koa'),
    Client = require('node-rest-client').Client;

const app = new Koa();
const client = new Client();
const url = 'https://www.binance.com/api/v1/klines?interval=1h&limit=24&symbol=BNBBTC';

app.use(async ctx => {
    await client.get(url, (data, response) => {
        ctx.body = JSON.stringify(data);
    });
});

app.listen(3002);

As if data in the console displays data for me, but not on the page

[ [ 1534849200000,
    '0.00151270',
    '0.00151480',
    '0.00150620',
    '0.00150950',
    '12238.78000000',
    1534852799999,
    '18.49577488',
    1045,
    '7293.00000000',
    '11.02999493',
    '0' ],
...
]

If you output what this handler itself displays

let dataParse = client.get(url, (data, response) => {
    return data;
});
console.log(dataParse);

Then he displays the entire response, but how

ClientRequest {
  domain: null,
  _events: {},
  _eventsCount: 0,
  _maxListeners: undefined,
  href: 'https://www.binance.com/api/v1/klines?interval=1h&limit=24&symbol=BNBBTC',
  options: 
   { host: 'www.binance.com',
     port: null,
     path: '/api/v1/klines?interval=1h&limit=24&symbol=BNBBTC',
     href: 'https://www.binance.com/api/v1/klines?interval=1h&limit=24&symbol=BNBBTC',
     method: 'GET',
     headers: {} },
  _httpRequest: 
   Writable {
     _writableState: 
      WritableState {
        objectMode: false,
        highWaterMark: 16384,
        finalCalled: false,
        needDrain: false,
        ending: false,
        ended: false,
        finished: false,
        destroyed: false,
        decodeStrings: true,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        corked: 0,
        sync: true,
        bufferProcessing: false,
        onwrite: [Function: bound onwrite],
        writecb: null,
        writelen: 0,
        bufferedRequest: null,
        lastBufferedRequest: null,
        pendingcb: 0,
        prefinished: false,
        errorEmitted: false,
        bufferedRequestCount: 0,
        corkedRequestsFree: [Object] },
     writable: true,
     domain: null,
.....

Then how to display what is in data?

Answer 1

` client.get` does not return a promise, so await doesn't work there.
We need to look at the dock and make sure that the promise is returned, which needs to be awaited.
It is inappropriate to confuse callback and await approaches.