javascript - 与 spawn() 子进程通信？

Question

我正在尝试使用 spawn() 创建子进程有自己的终端
父.js:

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

console.log('started parent process...'); //this should be printed in the parent terminal

const child = spawn('start node', [`child.js`], {
    cwd:__dirname,
    shell: true,
    stdio: [null, null, null, 'pipe']
});

const Name = 'general kenobi';

child.stdio[3].write(Name);

child.stdio[3].on('data', (data) => {
    console.log('data=>', data.toString());
    child.kill();
});

child.js:

console.log('started child process...');

(async()=>{
    await new Promise(r=>setTimeout(r,3000));

    try{
        let net = require('net');
        let pipe = new net.Socket({ fd: 3 });

        pipe.on('data',(data)=>{
            pipe.write(`hello there ${data}`);
        });
    }catch(err){console.log(err)}
    await new Promise(r => setTimeout(r, 3000));
})();

预期数据应为 data=> hello there general kenobi但它在子终端中给出了这个错误

 throw new ERR_INVALID_FD_TYPE(type);
  ^

TypeError [ERR_INVALID_FD_TYPE]: Unsupported fd type: UNKNOWN
    at new NodeError (node:internal/errors:371:5)
    at createHandle (node:net:152:9)
    at new Socket (node:net:340:20)
    at Object.<anonymous> (C:\...\parent.js:4:12)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:17:47 {
  code: 'ERR_INVALID_FD_TYPE'
}

我找不到很多引用资料，所以我使用了 this video作为指导
(请在回答时尽量避免使用第 3 方包裹)

Answer 1

删除 shell: true并将命令更改为 parent.js 中的“Node ”文件。

const child = spawn('node', [`child.js`], {
cwd:__dirname,
stdio: [null, null, null, 'pipe']
});

而不是使用 spawn 本身，同时添加 shell: true , spawn 将使用 shell of your system运行该命令。一般来说，我建议使用纯产卵而不使用外壳。不直接接触外壳和管道数据问题的风险将降低。