Blog Summary

发表于

Web常用

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req.body.xxx        //获取页面body里的参数
res.render('xx')    //将页面渲染到xx里
req.query.xxx;      //获取页面URL中带的参数
res.render('detail',{
        blogs: result[0]
      });           //渲染页面并传入参数,通过在数据库中查询得到的result是数组，不用result[0]传入，将显示Object对象
 <%= blog.content %>    //在ejs中接收数据
<% blogs.forEach(blog => { %>
      <li>
        <a href="/detail?blog_id=<%= blog.id %>"><%= blog.title %></a>  
      </li> 
    <% }) %>
    </ul>           //这种情况是将result直接传入，由于blogs是数组，所以用遍历forEach
                    //其中a标签中设置了带blog的id跳转
module.exports = {
    insertData:insertData,
    selectData:selectData,
    selectDataContent:selectDataContent
    };              //同一个JS中暴露多个函数，
var selectData = require('../tools/db').selectData;
var selectDataContent = require('../tools/db').selectDataContent;       //调用暴露的多个函数

Cookie

设置cookie

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var crypto = require('crypto');
var md5 = crypto.createHash('md5');
exports.authorizations = [];
exports.cookies = function(req, res, username){
	md5 = crypto.createHash('md5');
	md5.update(username + (new Date()).toString());
	var auth = md5.digest('hex');
	console.log(auth);
	exports.authorizations.push({username: username, auth: auth});
	res.cookie('username', username, {maxAge: 1 * 30 * 1000});
	res.cookie('auth', auth, {maxAge: 1 * 30 * 1000});
}
  • 调用md5.digest生成一组特殊的数值
  • exports.authorizations.push将页面传来的username加入到数组里
  • res.cookie设置username和特殊值存在的时间

将username存入cookie

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router.post('/', function(req, res, next) {
  var username = req.body.username;
  console.log(username);
  if(username === ""){
    res.render('loginFail');
    }
  auth.cookies(req, res, username);
  res.render('new');
});

设置路由

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var auth = require('../tools/cookie');
router.get('/new', function(req, res, next) {
	if((auth.authorizations.some(e => e.username === req.cookies.username)) && (auth.authorizations.some(e => e.auth === req.cookies.auth))){
		console.log(auth.authorizations);
		res.render('new');
	} else {
		res.render("login");
	}
});
  • 当客户端发送new请求,进入这个路由
  • 检查req.cookies.username和cookie里存的值是否相同