如何在Nodejs中将缓冲区转换为流

Question

我遇到了一个关于在Nodejs中将缓冲区转换为流的问题.这是代码:

var fs = require('fs');
var b = Buffer([80,80,80,80]);
var readStream = fs.createReadStream({path:b});

该代码引发异常:

TypeError: path must be a string or Buffer

然而,Nodejs的文档说fs.createReadStream()可以接受Buffer.

fs.createReadStream(path [,options])
  path <string> | <缓冲区> | <URL>
  选项<string> | <对象>

有人可以回答这个问题吗？非常感谢!

Answer 1

NodeJS 8+版本 将缓冲区转换为流

const { Readable } = require('stream');

/**
 * @param binary Buffer
 * returns readableInstanceStream Readable
 */
function bufferToStream(binary) {
    const readableInstanceStream = new Readable({
      read() {
        this.push(binary);
        this.push(null);
      }
    });

    return readableInstanceStream;

  }

Answer 2

节点 0.10 +

将缓冲区转换为流

var Readable = require('stream').Readable; 

function bufferToStream(buffer) { 
  var stream = new Readable();
  stream.push(buffer);
  stream.push(null);

  return stream;
}