node.js - 使用fork在子进程中传递和访问请求响应对象

Question

我想知道如何使用 fork 将请求响应对象从父进程传递到子进程。我做的是

var child = cp.fork(__dirname + '/childProcess.js', req, res);
child.on('message', function(m) 
{
    console.log("child process returned data " + m);
});
child.send("hello");

子进程.js

var req = process.argv[2];
var res = process.argv[3];
process.on('message', (msg) => 
{
    console.log("req object :-" + req );
    console.log("res object :-" + res);
}
process.send("callparent");

这让我在子进程中未定义。我也试过 child.send("hello", req.socket ) 。但后来我无法在子进程中访问 req 的方法。它显示为循环结构。

Answer 1

根据docs :

child.send(message[, sendHandle][, callback])

The optional sendHandle argument that may be passed to child.send() is for passing a TCP server or socket object to the child process. The child will receive the object as the second argument passed to the callback function registered on the process.on('message') event.

这表明您应该在 child.send() 函数中发送 req 或 req.socket 对象。

此外，您没有从注册到 process.on('message' ) 事件。