Connecting to the Binance WebSocket application interface with JavaScript: Keeping K -lines alive
As a developer of the Binance application subscription, you are likely to feel real -time retrieval of data. However, when you use requests to obtain one line (Klines) data, the resulting JSON response can be expired quickly due to latency and network congestion. To solve this problem, we will look at how to keep the K -lines alive by connecting to the Binance’s WebSocket application using JavaScript.
Binance WebSocket API Review
Before diving into the code, it is necessary to understand the basics of the Binance WebSocket application:
- The WS
terminal point offers real-time information updates for different markets.
- You can order certain end points and receive push notifications when new information is available.
- To keep the K-lines alive, you need to create a continuous connection with the websockets.
Connecting to the Binance WebSocket application interface with JavaScript
You can connect to the Binance WebSocket application connection using Javascript: The following steps:
- Install the required libraries : You need theWS
(WebSockets Library) andCrying ‘for encryption functions. Driving:
`Bash
NPM Install WS Crypto
`
2
`Javascript
Const websocket = Require (‘WS’);
Const WSS = new websocket.server ({port: 8080});
// Handle incoming connections and order Klines
wss.on (‘connection’, (ws) => {
Console.log (‘Customer connected’);
// Order the Klines end point ‘/klines’
ws.on (‘message’, (data) => {
if (data.type === ‘KLINE’) {
const {symbol, time interveval, open, high, low, close, volume} = json.parers (data);
Console.log (New Kline Received: $ {symbol} @ $ {timeinterval} interval);
// Update your application K-line details
Updateklines (symbol, time interval, open, high, low, close, volume);
}
});
ws.on (‘closed’, () => {
Console.log (‘Customer removed’);
});
});
`
This code creates a WebSocket server and listens to future connections. Once the new connection is formed, it orders the Klines end point in the /Klines section and processes incoming messages.
K-line data processing
If you want to process new information received at “Message” events, you can use JSON.PARSE () to structure an incoming message:
`Javascript
ws.on (‘message’, (data) => {
if (data.type === ‘KLINE’) {
const {symbol, time interveval, open, high, low, close, volume} = json.parers (data);
Console.log (New Kline Received: $ {symbol} @ $ {timeinterval} interval);
// Update your application K-line details
Updateklines (symbol, time interval, open, high, low, close, volume);
}
});
`
Keeping K-lines to survive
For the K-lines to survive, you need to create a continuous connection with the websockets. You can achieve this by creating a WebSocket server that listens to incoming connections and processes the messages accordingly.
In this example, we create one websocket server at the gate 8080:
`Javascript
WSS = new websocket.server ({port: 8080});
`
However, in the form of the codes supplied, we only connect from one customer. To keep the K-lines alive, you need to create several connections and process incoming messages.
Updating the application
To update your app with the latest K -line data, you can edit the Updateklines' function:
Javascript
Function update clinics (symbol, timeinterval, open, high, low, close, volume) {
Const Kllinedata = JSON.PARSE (JSON.STRINGify ({}); // Create a copy of the original data)
clliana.symbol = symbol;
Kllinedata.timeinterval = timeinterval;
Kllinedata.open = open;
Kllinedata.high = high;
Kllinedata.Low = low;
kllinedata.close = nearby;
Clinical.