43 lines
889 B
JavaScript
43 lines
889 B
JavaScript
'use strict';
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const Duplex = require('stream').Duplex;
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const kCallback = Symbol('Callback');
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const kOtherSide = Symbol('Other');
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class DuplexSocket extends Duplex {
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constructor(options) {
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super(options);
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this[kCallback] = null;
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this[kOtherSide] = null;
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}
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_read() {
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const callback = this[kCallback];
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if (callback) {
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this[kCallback] = null;
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callback();
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}
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}
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_write(chunk, encoding, callback) {
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this[kOtherSide][kCallback] = callback;
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this[kOtherSide].push(chunk);
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}
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_final(callback) {
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this[kOtherSide].on('end', callback);
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this[kOtherSide].push(null);
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}
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}
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class DuplexPair {
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constructor(options) {
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this.socket1 = new DuplexSocket(options);
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this.socket2 = new DuplexSocket(options);
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this.socket1[kOtherSide] = this.socket2;
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this.socket2[kOtherSide] = this.socket1;
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}
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}
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module.exports = DuplexPair;
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