[英]How to convert buffer to stream in Nodejs
我遇到了一个关于在 Nodejs 中将缓冲区转换为流的问题。代码如下:
var fs = require('fs');
var b = Buffer([80,80,80,80]);
var readStream = fs.createReadStream({path:b});
代码引发异常:
TypeError: path must be a string or Buffer
但是 Nodejs 的文档说 fs.createReadStream() 可以接受 Buffer。
fs.createReadStream(路径[,选项])
路径 <字符串> | <缓冲区> | <网址>
选项 <字符串> | <对象>
有人可以回答这个问题吗? 非常感谢!
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;
}
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;
}
const { Readable } = require('stream');
class BufferStream extends Readable {
constructor ( buffer ){
super();
this.buffer = buffer;
}
_read (){
this.push( this.buffer );
this.push( null );
}
}
function bufferToStream( buffer ) {
return new BufferStream( buffer );
}
var {Readable} = require('stream').Readable;
function bufferToStream(buffer) {
var stream = new Readable();
stream.push(buffer);
stream.push(null);
return stream;
}
我用功能风格重写了 Alex Dykyi 的解决方案:
var Readable = require('stream').Readable;
[file_buffer, null].reduce(
(stream, data) => stream.push(data) && stream,
new Readable()
)
我遇到了在Node.js中将缓冲区转换为流的问题,代码如下:
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
但是,Nodejs的文档说fs.createReadStream()可以接受Buffer。
fs.createReadStream(path [,options])
路径<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!
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.