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nodejs 如何执行 shell 命令,并把结果实时回显输出?

nodejs 如何执行 shell 命令,并把结果实时回显输出

const exec = require('child_process').exec;

exec('shell 命令', (error, stdout, stderr) => {
        console.log({ error, stdout, stderr });
    });

我尝试如上写法
但是发现回调函数 (error, stdout, stderr)=>{} 在命令执行完毕才一次性返回, 而不是实时回显

请问如何让输出实时回显


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1 Answer

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by (71.8m points)

你需要用 spawn, 它是一个事件触发器对象版本的 exec, 以下例子来自 node 官方文档:

https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options

const { spawn } = require('child_process');
const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', (data) => {
  console.log(`stdout: ${data}`);
});

ls.stderr.on('data', (data) => {
  console.error(`stderr: ${data}`);
});

ls.on('close', (code) => {
  console.log(`child process exited with code ${code}`);
});

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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