NodeJS writeStream空文件 [英] NodeJS writeStream empty file

问题描述

$ b

  var buff = new Buffer（ base64data， '的base64'）; 
 console.log（base64data）; 
 
 var stream = fs.createWriteStream（'/ path / to / thefile.png'）; 
 stream.write（buff）
 stream.end（）
  

然而，结果文件是空的。

当我输出 console.log（base64data）; 并解码它在本地，它产生一个有效的png二进制文件，为什么文件是空的？

该文件是一个3600x4800 px png文件（即它是巨大的），这可能是一个因素？

另外，我还试过 writeFile ，没有运气。

是的， fs 是 require（'fs'）

谢谢

解决方案

你的stream.end（）没有写任何东西。它是异步函数记住。

  var buff = new Buffer（base64data，'base64'）; 
 console.log（base64data）; 
 
 var stream = fs.createWriteStream（'/ path / to / thefile.png'）; 
 stream.write（buff）; 
 stream.on（end，function（）{
 stream.end（）; 
}）; 
  

I am trying to use nodeJS to save a processed image stored in a base64 string.

var buff = new Buffer(base64data,'base64');
console.log(base64data);

var stream = fs.createWriteStream('/path/to/thefile.png');
stream.write(buff)
stream.end()

However, the resulting file is empty.

When I take the output of console.log(base64data); and decode it locally, it produces a valid png binary, so why is the file empty?

The file is a 3600x4800 px png file (i.e. it's huge), could this be a factor?

Also, I tried writeFile as well, no luck.

And yes, fs is require('fs')

Thanks

解决方案

your stream.end() too soon as nothing is written. it is async function remember.

var buff = new Buffer(base64data,'base64');
console.log(base64data);

var stream = fs.createWriteStream('/path/to/thefile.png');
stream.write(buff);
stream.on("end", function() {
  stream.end();
});

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