本文介绍了Node.js和express - 如何读取cookie但未定义的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
res.cookie（'test'，'yes' {
expires：new Date（Date.now（）+ 365 * 2 * 24 * 60 * 60 * 1000），
httpOnly：true
}）;
我正在使用中间件尝试阅读cookie：
app.use（express.cookieParser（））;
var cookie_id = req.cookies.test;
问题是cookie_id未定义，这将是'是'
Express服务器在开发模式下侦听端口8060
TypeError：无法读取未定义的属性test
在/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/app.js:48:29
在回调（/ home / ubuntu / workspace / rtbopsConfig / rtbServers / rtbNodejsServer / nodeServer / node_modules / express / lib /router/index.js:272:11）
在param（/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:246:11）
at pass（/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:253:5）
在Router._dispatch（/ home / ubuntu /workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:280:4）
在Object.handle（/ home / ubun tu / workspace / rtbopsConfig / rtbServers / rtbNodejsServer / nodeServer / node_modules / express / lib / router / index.js：45：10）
在下一个（/ home / ubuntu / workspace / rtbopsConfig / rtbServers / rtbNodejsServer / nodeServer / （/ home / ubuntu / workspace / rtbopsConfig / rtbServers / rtbNodejsServer / nodeServer / node_modules / express / ...） node_modules / connect / lib / middleware / methodOverride.js：35：5）
在下一个（/ home / ubuntu / workspace / rtbopsConfig / rtbServers / rtbNodejsServer / nodeServer / node_modules / express / node_modules / connect / lib / http。 js：204：15）
在Object.bodyParser [as handle]（/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js： 88:61）
我做错了什么？
接受文本/ html，application / xhtml + xml，application / xml; q = 0.9，* /*;q=0.8
接受编码gzip，deflate
接受语言en-us，en; q = 0.5
连接保持活动
Cookie测试=是
主机127.0.0.1:8060
用户代理Mozilla / 5.0（X11; Ubuntu的; Linux x86_64; rv：12.0）Gecko / 20100101 Firefox / 12.0
//配置
app.configure（function（）{
app.set（'views'，__dirname +'/ views'）;
app.set（'查看引擎'，'jade'）;
app.use（express.bodyParser（））;
app.use（express.methodOverride（））;
app.use（app.router ）;
app.use（express.static（__ dirname +'/ public'））;
app.use（express.cookieParser（））;
}）;
解决方案
您需要使用 express .cookieParser（） before app.router ;中间件按顺序运行，这意味着在路由执行之前，它并没有达到 cookieParser（）。
尝试这样：
app.set（'views'，__dirname +'/ views'）;
app.set（'view engine'，'jade'）;
app.use（express.bodyParser（））;
app.use（express.methodOverride（））;
app.use（express.cookieParser（））;
app.use（app.router）;
app.use（express.static（__ dirname +'/ public'））;
I use the below to set a cookie using express.
res.cookie('test', 'yes', {
expires: new Date(Date.now() + 365*2*24*60*60*1000),
httpOnly: true
});
I am using the middleware to try and read the cookie:
app.use(express.cookieParser());
var cookie_id = req.cookies.test;
Problem is that cookie_id is undefined whne it would be 'yes'
Express server listening on port 8060 in development mode
TypeError: Cannot read property 'test' of undefined
at /home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/app.js:48:29
at callbacks (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:272:11)
at param (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:246:11)
at pass (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:253:5)
at Router._dispatch (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:280:4)
at Object.handle (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/lib/router/index.js:45:10)
at next (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/node_modules/connect/lib/http.js:204:15)
at Object.methodOverride [as handle] (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/node_modules/connect/lib/middleware/methodOverride.js:35:5)
at next (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/node_modules/connect/lib/http.js:204:15)
at Object.bodyParser [as handle] (/home/ubuntu/workspace/rtbopsConfig/rtbServers/rtbNodejsServer/nodeServer/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:88:61)
What did I do wrong?
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-us,en;q=0.5
Connection keep-alive
Cookie test=yes
Host 127.0.0.1:8060
User-Agent Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/12.0
// Configuration
app.configure(function() {
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
app.use(express.cookieParser());
});
解决方案
You need to use express.cookieParser() before app.router; middleware is run in order, meaning it's never even reaching cookieParser() before your route is executed.
Try this:
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.cookieParser());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
这篇关于Node.js和express - 如何读取cookie但未定义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！