Starting and stopping a Websocket Connection from a GUI Application Using Binance Websocket
As a developer, you may have encountered situations where you need to control the flow of your program from within a user interface (GUI) Application. In this article, we’ll explore how to create a simple gui-based system that starts and stops a websocket connection using the Binance Websocket Library.
Prerequisites
- Install node.js on your computer (
node.js.org).
- Ensure you have an existing Binance Websocket Library Installed (
NPM Install Binance-Websocket).
- Create a New Gui Application (E.G., Using Electron or a Framework Like React, Angular, etc.).
- Set up the Websocket Connection with the Binance API.
Example Code
`JavaScript
// Import Required Libraries
Const {Websocket} = Require ('Binance-Websocket');
Const {CreateInterface} = Require ('Readline');
// initialize the websocket connection
Const Websocket = New Websocket ({
Host: 'Your-Binance- EXCHANGE.COM',
Port: 3000,
});
// set up the gui event loop
Const gui = createinterface ({
input: process.stdin,
Output: process.stdout,
});
// Function to Start/Stop the Websocket Connection
Function Handlestart () {
Websocket.on ('Connect', () => {
console.log ('Websocket Connection Established. Starting ...');
// Start a New Task when the User Presses Enter
gui.once ('line', line => {
if (line === 'start') {
Websocket.send ({Command: 'Start'});
Setimeout (() => {
console.log ('stopping websocket connection ...');
Websocket.close ();
}, 5000);
}
});
// Start A New Task When the User Presses Ctrl+C
process.on ('Sigint', () => {
gui.kill ();
});
});
}
// Function to Start/Stop the Websocket Connection from the Command Line
Function HandlestartCommand () {
Const reading = requirement ('readline');
Const rl = readline.createInterface ({
input: process.stdin,
Output: process.stdout,
});
rl.question ('Start (type "stop" to stop), answer => {
if (answer.tolowerCase () === 'start') {
Websocket.send ({Command: 'Start'});
Setimeout (() => {
console.log ('stopping websocket connection ...');
Websocket.close ();
Handlestopmand ();
}, 5000);
} Else IF (Answer.TolowerCase () === 'Stop') {
Handlestopmand ();
} Else {
console.error ('Invalid input. Exiting ...');
HandlestartCommand ();
}
});
}
// Function to stop the Websocket Connection
Function Handlestopmand () {
Websocket.send ({Command: 'Close'});
}
// Main Program Loop
While (True) {
Handlestart ();
}
how it works
- The
HandlestartFunction sets up a websocket event listener for theConnectEvent.
- When the User Presses Enter, the Websocket Connection is established and a new task starts when the user presses Ctrl+c.
- A simple text-based interface is created using readline.js, where users can type « Start » to start the websocket connection or « stop » to stop it.
tips and variations
- To make the Gui More Interactive, Considerding Buttons to Start/Stop the Websocket Connection.
- You can use a more advanced gui library like electron or react for a native desktop application.
- If you prefer a command-line interface, modify the
HandlestartCommandMandFunction to accept input from the user through the console.
- To persist data between sessions, consider using a database or file storage.