36 lines
1.5 KiB
JavaScript
36 lines
1.5 KiB
JavaScript
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//+------------------------------------------------------------------+
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//| wsintro.js |
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//| Copyright 2022, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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// attach ("#include") 'ws'-module which provides WebSockets functionality
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const WebSocket = require('ws');
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// choose network port number and create WebSocket server running on it
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const port = 9000;
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const wss = new WebSocket.Server({ port: port });
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// display feedback for ongoing actions in console (command line window)
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console.log('listening on port: ' + port);
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// define in-place event handler for new connections,
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// function doesn't have to have a name, because it's used in-place
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wss.on('connection', function(channel)
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{
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// for every connection assign event handler for new messages:
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// the event handler will not be triggered, until a message arrives
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channel.on('message', function(message)
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{
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// show message in console for debug purpose
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console.log('message: ' + message);
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// just send out the same message back to correspondent
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channel.send('echo: ' + message);
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});
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console.log('new client connected!');
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// send "hello" notification to new client
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channel.send('connected!');
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});
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//+------------------------------------------------------------------+
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