Created
November 13, 2018 20:38
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Reactive TCP socket programming in Node.js
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import { connect, NetConnectOpts } from 'net'; | |
import { Observable, Observer, Subject } from 'rxjs'; | |
// TCP Client | |
const fromSocket = (options: NetConnectOpts): Subject<Buffer> => { | |
const socket = connect(options); | |
const observable = Observable.create(function(obs) { | |
socket.on('data', obs.next.bind(obs)); | |
socket.on('error', obs.error.bind(obs)); | |
socket.on('close', obs.complete.bind(obs)); | |
return socket.destroy.bind(socket); | |
}); | |
const observer: Partial<Observer<Buffer>> = { | |
next: data => socket.write(data) | |
} | |
const subject = Subject.create(observer, observable); | |
return subject; | |
} | |
// Usage example | |
const host = 'localhost'; | |
const port = 55013; | |
const socket = fromSocket({ host, port }) | |
const connection = socket.subscribe({ | |
next: buffer => console.log(buffer.toString()), | |
error: (err) => console.log(`error occurred: ${err.message}`), | |
complete: () => console.log('done') | |
}); | |
socket.next(Buffer.from('Hello World!!!')); | |
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Any idea how you would achieve this with the latest version of RxJs?
Subject.create()
in unfortunately deprecated 😔