新人一枚，在做Express+nodejs博客时 涉及状态栏转换。代码如下：
header.ejs++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
<nav> <span><a title=“主页” href="/">HOME</a></span> ** <% if(user){ %>** //===========>第一个问题：无法实现切换状态栏 <span><a title=“登出” href="/logout">LOGOUT</a></span> <span><a title=“发表” href="/post">POST</a></span> <% } else { %> <span><a title=“登录” href="/login">LOGIN</a></span> <span><a title=“注册” href="/reg">REGISTER</a></span> <% } %> </nav> <article> <% if(success){ %> <div><%= success %></div> <% } %> <% if(error){ %> <div><%= error %></div> <% } %>
index.js(路由文件)+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++只贴部分。
router.get(’/’, function (req, res) {
res.render(‘index’, {
title:‘主页’,
** user: req.session.user,
success: req.flash(‘success’).toString(),
error: req.flash(‘error’).toString()**
});
});
router.get(’/reg’, function (req, res) {
res.render(‘reg’, {
title: ‘注册’,
user: req.session.user,
success: req.flash(‘success’).toString(),
error: req.flash(‘error’).toString()
});
});
router.post(’/reg’, function (req, res) {
var name = req.body.name;
var password = req.body.password;
var email = req.body.email;
var password_re = req.body[‘password-repeat’];
if (password != password_re) {
req.flash(‘error’, ‘两次输出不一样!!’);
return res.redirect(’/reg’);
}
//生成密码 m5 zhi
const md5 = crypto.createHash(‘md5’);
var password = md5.update(req.body.password).digest(‘hex’);
var newUser = new User({
name: req.body.name,
password: password,
email: req.body.email
});
console.log(newUser);
User.get(newUser.name, function (err, user) {
if (err) {
req.flash(‘error’, ‘打开失败’);
returnres.redirect(’/’);
}
if (user) {
req.flash(‘error’, ‘已存在’);
return res.redirect(’/reg’);
}
newUser.save(function (err, user) {
if (err) {
req.flash(‘error’, err);
return res.redirect(’/reg’);
}
req.session.user = user;
console.log(req.session.user);
req.flash(‘success’, ‘注册成功!!’);
res.redirect(’/’);
});
});
});
router.get(’/login’, function (req, res) {//==========>第二个问题：经过添加“状态栏切换功能”
//==========>登陆页乱码：
//==========>esc is not a function
//==========>TypeError: E:\blog\views\login.ejs:1
//==========>>> 1| <%- include header %>
//==========> 2| <form method=“post”>
//==========> 3| 用户名：<input type=“text” name=“name”/>
//==========> 4| placeholder=“请输入用户名”/><br/>
res.render(‘login’, { title: ‘登录’ });
});
router.post(’/login’, function (req, res) {
var md5=crypto.createHash(‘md5’),
password=md5.update(req.body.password).digest(‘hex’);
//检查用户是否存在
User.get(req.body.name,function(err,user){
if(!user){
req.flash(‘error’,’!’);
return res.redirect(‘login’); //用户不存在
}
if (user.password!=password){
req.flash(‘error’,’!!’);
return res.redirect(’/login’); //密码不一样
}
//用户信息存入session
req.session.user=user;
//=======>（仍旧是第一个问题）这个无法实现赋值，user跑出来为undefined。
req.flash(‘success’,’!’);
res.redirect(’/’);//
});
});
router.get(’/post’, function (req, res) {
res.render(‘post’, { title: ‘发表’ });
});
router.post(’/post’, function (req, res) {
});
router.get(’/logout’, function (req, res) {
req.session.user=null;
req.flash(‘success’,’!!’);
res.redirect(’/’);
});
module.exports = router;
app.js+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ var index = require(’./routes/index’); app.use(session({ resave:false, saveUninitialized: true, secret: settings.cookieSecret, key: settings.db,//cookie name cookie: { maxAge: 1000 * 60 * 60 * 24 * 30 },//30days store: new MongoStore({ url: ‘mongodb://localhost/db’ }) })); app.use(flash());
粗体为后添加“状态栏切换功能”code
