typescript_tcp_protobuf/tcp_client.ts

import * as net from 'net';
import _, {Root} from "protobufjs";
const {load} = _;

const data = {name: 'Jack', age: 18};

load('proto/messages.proto')
    .then((root) => {
        const PersonMessage = (root as Root).lookupType('Messages.Person');
        const payload = data;
        let errMsg = PersonMessage.verify(payload);
        if (errMsg)
            throw  Error(errMsg);
        const message = PersonMessage.create(payload);
        const buffer = PersonMessage.encode(message).finish();

        const client = new net.Socket();
        client.connect(1337, '127.0.0.1', () => {
            console.log('Connected!');
            client.write(buffer);
        });

        client.on('data', data => {
            console.log('Received: ' + data);
            client.destroy();
        });

        client.on('close', () => {
            console.log('Connection closed!');
        })
    });