会话身份validationtypes错误：对象＃属性“types”<ServerResponse>不是函数
我正在学习node.js，并且通过Brad Dayleys书中的一些示例来expression和工作。 我从本书中复制了下面的代码，它使用encryption和快速会话实现了一些基本的会话authentication：
var express = require('express'); var bodyParser = require('body-parser'); var cookieParser = require('cookie-parser'); var session = require('express-session'); var crypto = require('crypto'); //encrypt password function function hashPW(pwd) { var hash = crypto.createHash('sha256').update(pwd).digest('base64'); return hash.toString(); } var app = express(); //this is the new way to call this module app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: true })); app.use(cookieParser('MAGICString')); //new way to init session app.use(session({secret: 'ssshhhhh', resave: false, saveUninitialized: false})); //see if user is authorized to be here app.get('/restricted', function(req, res) { if (req.session.user) { res.send ('<h2>' + req.session.success + '</h2>' + '<p>You have entered the restricted section<p><br>' + '<a href="/logout">logout</a>'); } else { req.session.error = 'Access denied'; res.redirect('/login'); } }); app.get('/logout', function (req, res) { req.session.destroy(function() { res.redirect('/login'); }); }); app.get('/login', function(req, res) { var response = '<form method="POST">' + 'Username: <input type="text" name="username"><br>' + 'Password: <input type="text" name="password"><br>' + '<input type="submit" value="Submit"></form>'; if (req.session.user) { res.redirect('/restricted'); } else if (req.session.error) { response += '<h2>' + req.session.error + '</h2>'; } res.type = ('html'); res.send(response); }); //on form submit app.post('/login', function (req, res) { //user should be a lookup of req.body.username in database var user = {name: req.body.username, password:hashPW("myPass")}; if (user.password === hashPW(req.body.password.toString())) { req.session.regenerate(function() { req.session.user = user; req.session.success = 'Authenticated as ' + user.name; res.redirect('/restricted'); }); } else { req.session.regenerate(function() { req.session.error = 'Authentication failed'; res.redirect('/restricted'); }); res.redirect('/login'); } }); app.listen(8080); 当我运行时，我得到的错误：
TypeError: Property 'type' of object #<ServerResponse> is not a function at ServerResponse.send (/home/terry/myProjects/serverLearn/node_modules/express/lib/response.js:129:14) at app.post.user.name (/home/terry/myProjects/serverLearn/express_auth_session.js:63:9) at Layer.handle [as handle_request] (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/layer.js:82:5) at next (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/route.js:110:13) at Route.dispatch (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/route.js:91:3) at Layer.handle [as handle_request] (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/layer.js:82:5) at /home/terry/myProjects/serverLearn/node_modules/express/lib/router/index.js:267:22 at Function.proto.process_params (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/index.js:321:12) at next (/home/terry/myProjects/serverLearn/node_modules/express/lib/router/index.js:261:10) at Object.<anonymous> (/home/terry/myProjects/serverLearn/node_modules/express-session/index.js:421:7)
原谅我的不高兴，但我不明白什么是错的。 我什至不能告诉它究竟是哪里有错误。 任何帮助或指针将不胜感激！
该行：
res.type = ('html');
是错的。 您正尝试在Express不期待的响应对象上设置某些内容。
如果您想手动设置响应的content-type ，则可以使用以下代码replace此行：
res.header("Content-Type", "text/html");
或者另一种方式，为了完整性：
res.set('Content-Type', 'text/html');