mirror of https://gitee.com/openkylin/nodejs.git
52 lines
975 B
JavaScript
52 lines
975 B
JavaScript
'use strict';
|
|
|
|
const {
|
|
Symbol,
|
|
} = primordials;
|
|
|
|
const { Duplex } = require('stream');
|
|
|
|
const kCallback = Symbol('Callback');
|
|
const kOtherSide = Symbol('Other');
|
|
|
|
class DuplexSocket extends Duplex {
|
|
constructor() {
|
|
super();
|
|
this[kCallback] = null;
|
|
this[kOtherSide] = null;
|
|
}
|
|
|
|
_read() {
|
|
const callback = this[kCallback];
|
|
if (callback) {
|
|
this[kCallback] = null;
|
|
callback();
|
|
}
|
|
}
|
|
|
|
_write(chunk, encoding, callback) {
|
|
if (chunk.length === 0) {
|
|
process.nextTick(callback);
|
|
} else {
|
|
this[kOtherSide].push(chunk);
|
|
this[kOtherSide][kCallback] = callback;
|
|
}
|
|
}
|
|
|
|
_final(callback) {
|
|
this[kOtherSide].on('end', callback);
|
|
this[kOtherSide].push(null);
|
|
}
|
|
}
|
|
|
|
class DuplexPair {
|
|
constructor() {
|
|
this.socket1 = new DuplexSocket();
|
|
this.socket2 = new DuplexSocket();
|
|
this.socket1[kOtherSide] = this.socket2;
|
|
this.socket2[kOtherSide] = this.socket1;
|
|
}
|
|
}
|
|
|
|
module.exports = DuplexPair;
|