在块上获取execFile stdOut [英] get execFile stdOut on chunks

问题描述

我正在尝试使用execFile并记录stdOut，该值给出了完成任务的百分比，但是有回调函数:

I am trying to use execFile and log the stdOut that gives the percentage done on the task, but the callback function:

var child = require('child_process');

child.execFile("path/to/the/file", options, function (error, stdout, stderr) {
    console.log('stdout: ' + stdout);
});

等待直到该过程完成，然后立即记录所有内容. 在处理过程中如何获取信息并将其部分记录?，我已经尝试过:

Waits until the process is done and then logs everything at once. How do i get the info while is being processed and log it in parts?, I have try this:

child.stdout.on('data', function (data) {
  console.log(data);
});

但是我收到此错误:Cannot read property 'on' of undefined"

推荐答案

您应使用 .spawn() 而不是.exec()/.execFile()来流输出:

You should use .spawn() instead of .exec()/.execFile() for streaming the output:

var spawn = require('child_process').spawn;

var child = spawn("path/to/the/file", args);

child.stdout.on('data', function(data) {
  console.log(data.toString());
});

child.on('close', function(code, signal) {
  // process exited and no more data available on `stdout`/`stderr`
});

这篇关于在块上获取execFile stdOut的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！