javascript - Node.js 重构 : How to pass object-pointer (here: a socket)?

Question

目标

避免 Node.js 中的“回调 hell ”。

问题

重构后套接字对象不再可用。如何将其传递给函数？

重构前

服务器.js

var  ActiveSession = require('./session-model');

// ...

socket.on("c2s_logout", function (message) {
    ActiveSession.remove({ sessionid: message.sessionid } , function(err, activeSession) {
        socket.emit("s2c_logout_success");
    });
});

重构后

auth.js

var  ActiveSession = require('./session-model');
function logout(message) {
    ActiveSession.remove({ sessionid: message.sessionid } , function(err, activeSession) {
        //socket.emit("s2c_logout_success"); // THE PROBLEM
        // THIS IS NOT POSSIBLE ANYMORE AFTER REFACTORING
        // SOCKET IS NOT AVAILABLE
    });
}
module.exports.logout = logout;

服务器.js

var Auth = require('./auth.js');

// ...

socket.on("c2s_logout",  Auth.logout );

Answer 1

您可以将套接字传递给注销函数。

auth.js

var  ActiveSession = require('./session-model');
function logout(message, socket) {
    ActiveSession.remove({ sessionid: message.sessionid } , function(err, activeSession) {
        socket.emit("s2c_logout_success"); // NO PROBLEM

    });
}
module.exports.logout = logout;

服务器.js

var Auth = require('./auth.js');

// ...

socket.on("c2s_logout", function(message){  Auth.logout(message, socket); });