如何使用快速框架在节点js中设置cookie？ [英] How to set cookie in node js using express framework?

问题描述

在我的应用程序中，我需要使用快速框架设置cookie。我尝试了以下代码，但它没有设置cookie。任何人都可以帮助我这样做。

In my application i need to set cookie using express framework.I have tried the following code but its not setting the cookie.Can anyone help me to do this.

       var express = require('express'), http = require('http');

       var app = express();


       app.configure(function(){
               app.use(express.cookieParser());

               app.use(express.static(__dirname + '/public'));

               app.use(function (req, res) {

                      var randomNumber=Math.random().toString();
                      randomNumber=randomNumber.substring(2,randomNumber.length);
                      res.cookie('cokkieName',randomNumber, { maxAge: 900000, httpOnly: true })
                      console.log('cookie have created successfully');
               });

             });

           var server = http.createServer(app);
           var io = require('socket.io').listen(server);
           server.listen(5555);

推荐答案

在Express中使用中间件的顺序问题：

The order in which you use middleware in Express matters: middleware declared earlier will get called first, and if it can handle a request, any middleware declared later will not get called.

如果 express.static（），则中间件将被调用，如果它可以处理一个请求， 正在处理请求，您需要移动您的中间件：

If express.static is handling the request, you need to move your middleware up:

// need cookieParser middleware before we can do anything with cookies
app.use(express.cookieParser());

// set a cookie
app.use(function (req, res, next) {
  // check if client sent cookie
  var cookie = req.cookies.cookieName;
  if (cookie === undefined)
  {
    // no: set a new cookie
    var randomNumber=Math.random().toString();
    randomNumber=randomNumber.substring(2,randomNumber.length);
    res.cookie('cookieName',randomNumber, { maxAge: 900000, httpOnly: true });
    console.log('cookie created successfully');
  } 
  else
  {
    // yes, cookie was already present 
    console.log('cookie exists', cookie);
  } 
  next(); // <-- important!
});

// let static middleware do its job
app.use(express.static(__dirname + '/public'));

此外，中间件需要结束请求响应），或将请求传递到下一个中​​间件。在这种情况下，我已经做了后者通过调用 next（）当cookie设置时。

Also, middleware needs to either end a request (by sending back a response), or pass the request to the next middleware. In this case, I've done the latter by calling next() when the cookie has been set.

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