Start and detention of a websockt connection from a GUI application using Binance Websockt
As a developer, it is possible that you have found situations in which you need to control the flow of your program from a user interface application (GUI). In this article, we will explore how to create a simple GUI system that starts and stop a websockt connection using the Binance Websocket Library.
PREVIOUS REQUIREMENTS
- Install node.js on your computer (
node.js.org).
- Be sure to have an existing Binance Websockt Library (
NPM Install Binance-Websocket).
- Create a new Gui application (for example, using electron or a frame such as react, angular, etc.).
- Configure the websockt connection with the Binance API.
Example code
`JavaScript
// Import required libraries
const {websockt} = require ('binance-websocket');
const {createinterface} = require ('readline');
// Initialize the websockt connection
const websockt = new websockt ({{
Host: 'Your-binance-exchange.com',
Port: 3000,
});
// Set the GUI event loop
const gui = createinterface ({{
Entrance: process.stdin,
Departure: Process.stdout,
});
// Function to start/stop the websocket connection
Handlstart Function () {
Websockt.on ('Connect', () => {
Console.log ('established websockt connection. Start ...');
// Start a new task when the user press Enter
Gui.once ('line', line => {
if (line === 'start') {
Websockt.send ({Command: 'Start'});
Settimaut (() => {
Console.log ('Stop the websockt connection ...');
Websockt.close ();
}, 5000);
}
});
// Start a new task when the user presses Ctrl+C
Process.on ('Sigint', () => {
Gui.kill ();
});
});
}
// Function to start/stop the websockt connection from the command line
Handlstartcommand function () {
Readline = request ('readline');
const rl = readline.createinterface ({{
Entrance: process.stdin,
Departure: Process.stdout,
});
rl.Question ('start (type "stop" to stop)', answer => {
if (answer.tolowercase () === 'start') {
Websockt.send ({Command: 'Start'});
Settimaut (() => {
Console.log ('Stop the websocket connection ...');
Websockt.close ();
handlestopcommand ();
}, 5000);
} else if (answer.tolowercase () === 'stop') {
handlestopcommand ();
} others {
Console.error ('Input not valid. Exit ...');
Handlstartcommand ();
}
});
}
// Function to stop the websocket connection
HandingCommand function () {
Websockt.send ({command: 'close'});
}
// Main program loop
While (True) {
Handlstart ();
}
How works
- The functionHandlstart
establishes a listener of websocket events for the 'Connect' event.
- When the user presses enter, the websockt connection is established and a new task begins when the user presses Ctrl+C.
- A simple text -based interface is created using Readline.js, where users can write "start" to start the websockt connection or "stop" to stop it.
Tips and variations
- For the GUI to be more interactive, consider add buttons to start/stop the websockt connection.
- You can use a more advanced GUI library such as electron or react for a native desktop application.
- If you prefer a command line interface, modify theHandlSTARTCOMAND` function to accept user entry through the console.
- To persist the data between sessions, consider using a database or file storage.