表达cookie返回undefined

Question

我正在尝试在express.js上设置cookie,但它返回undefined.我搜索了很多网页并放在express.cookieParser()上面,app.use(app.router) 但它仍然无法返回正确的值.

app.js

app.configure(function(){
   var RedisStore = require('connect-redis')(express);
    app.use(express.logger());
    app.set('view options', { layout: false });
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.bodyParser({uploadDir: './uploads/tmp'}));
    app.use(express.methodOverride());
    app.use(express.cookieParser());
    app.use(express.session({ secret: "william", store: new RedisStore }));
//Initialize Passport!  Also use passport.session() middleware, to support
//persistent login sessions (recommended).
    app.use(passport.initialize());
    app.use(passport.session());
    //app.router should be after passportjs
    app.use(app.router);
    app.use(express.compiler({ src: __dirname + '/public', enable: ['less']}));
    app.use(express.static(path.join(__dirname, 'public')));
});

app.get('/', function(req, res) {
    res.cookie('cart', 'test', {maxAge: 900000, httpOnly: true})
});

app.get('/test', function(req, res) {
    res.send('testcookie: ' + req.cookies.cart);
});

结果:

testcookie: undefined

Answer 1

Cookie 设置在 HTTP 标头中。res.cookie()只是设置 HTTP 结果的标头，但实际上并不发送任何 HTTP。如果你的代码在语法上是正确的并且它运行了，它实际上只是坐着并且不返回任何内容。我还修复了您的代码中的一些语法错误app.get()：

app.get('/', function(req, res) {
    res.cookie('cart', 'test', {maxAge: 900000, httpOnly: true});
    res.send('Check your cookies. One should be in there now');
});