使用Node JS将Uint8Array转换为流

Question

将原生JavaScript Uint8Array转换为可读或转换Stream的最佳方法是什么

我想出了如何将Uint8Array转换成缓冲区，不确定这是否有帮助：

var uint8array = new Uint8Array();
var buffer = new Buffer(uint8array);

Answer 1

standard way将使用_read方法定义一个可读的流：

var Stream = require('stream');

var myStream = new Stream.Readable();
var i = 0;
var data = [1, 2, 3, 4];

myStream._read = function(size) {
  var pushed = true;
  while (pushed && i < data.length) {
    pushed = this.push(data[i++]);
  }

  if (i === data.length) {
    this.push(null);
  }
};

myStream.pipe(somewhere);

但是，您也可以使用event-stream的readArray方法：

var es = require('event-stream');
var data = [1, 2, 3, 4];
var myStream = es.readArray(data);

myStream.pipe(somewhere);

Answer 2

我使用的是Duplex而不是Readable (归功于Brian Mancini )：

import { Duplex } from 'stream';
// Or non ES6 syntax:
// const Duplex = require('stream').Duplex
let stream = new Duplex();
stream.push(buffer);
stream.push(null);
stream.pipe(process.stdout);