isadmin报错，且如果没有正常运行的问题
调了好久没调出来希望老师看看
首先是admin.html 因为直接在仓库复制，应该没有问题
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>管理中心</title>
<style type="text/css">
body {
margin: 0 20px;
line-height: 1;
}
a {
text-decoration-line: none;
cursor: pointer;
}
table {
border: 1px solid #ccc;
}
table th {
text-align: left;
background-color: #f1f1f1;
}
table td:nth-child(1) {
width: 300px;
}
</style>
</head>
<body>
<h1 style="border-bottom: 1px solid #ccc; padding-bottom: 10px;">管理中心</h1>
<p>
<a href="/new.html">新建博客</a>
</p>
<div style="margin-bottom: 10px;">
<input id="text-keyword">
<button id="btn-search">搜索</button>
</div>
<table id="table-container">
<tr>
<th>博客标题</th>
<th colspan="2">操作</th>
</tr>
</table>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
<script>
// 发送 get 请求
function get(url) {
return $.get(url)
}
// 发送 post 请求
function post(url, data = {}) {
return $.ajax({
type: 'post',
url,
data: JSON.stringify(data),
contentType: "application/json",
})
}
// 获取 url 参数
function getUrlParams() {
let paramStr = location.href.split('?')[1] || ''
paramStr = paramStr.split('#')[0]
const result = {}
paramStr.split('&').forEach(itemStr => {
const arr = itemStr.split('=')
const key = arr[0]
const val = arr[1]
result[key] = val
})
return result
}
// 获取 dom 元素
const $textKeyword = $('#text-keyword')
const $btnSearch = $('#btn-search')
const $tableContainer = $('#table-container')
// 拼接接口 url
let url = '/api/blog/list?isadmin=1' // 增加一个 isadmin=1 参数，使用登录者的用户名，后端也需要修改 ！！！
const urlParams = getUrlParams()
if (urlParams.keyword) {
url += '&keyword=' + urlParams.keyword
}
// 加载数据
get(url).then(res => {
if (res.errno !== 0) {
alert('数据错误')
return
}
// 显示数据
const data = res.data || []
data.forEach(item => {
$tableContainer.append($(`
<tr>
<td>
<a href="/detail.html?id=${item.id}" target="_blank">${item.title}</a>
</td>
<td>
<a href="/edit.html?id=${item.id}">编辑</a>
</td>
<td>
<a data-id="${item.id}" class="item-del">删除</a>
</td>
</tr>
`))
})
})
// 搜索
$btnSearch.click(() => {
const keyword = $textKeyword.val()
location.href = '/admin.html?keyword=' + keyword
})
// 删除
$tableContainer.click(e => {
const $target = $(e.target)
if ($target.hasClass('item-del') === false) {
return
}
if (confirm('确定删除？')) {
const url = '/api/blog/del?id=' + $target.attr('data-id')
post(url).then(res => {
if (res.errno !== 0) {
alert('操作错误')
return
}
location.href = location.href
})
}
})
</script>
</body>
</html>
其次是blog.js
const { getList,
getDetail,
newBlog,
updateBlog,
delBlog } = require('../controller/blog')
const { SuccessModel, ErrorModel } = require('../model/resModel')
// 统一的登录验证函数
const loginCheck = (req) => {
if (!req.session.username) {
return Promise.resolve(new ErrorModel('尚未登陆'))
}
}
const handleBlogRouter = (req, res) =>{
const method = req.method
const id = req.query.id
if (method === 'GET' && req.path === '/api/blog/list'){
let author = req.query.author || ''
const keyword = req.query.keyword || ''
// const listData = getList(author, keyword)
//return new SuccessModel(listData)
console.log('req' ,req.query)
if(req.qeury.isadmin) {
const loginCheckResult = loginCheck(req)
if(loginCheckResult) {
return loginCheckResult
}
author = req.session.username
}
const result = getList(author, keyword)
return result.then(listData => {
return new SuccessModel(listData)
})
}
if (method === 'GET' && req.path === '/api/blog/detail'){
// const data = getDetail(id)
// return new SuccessModel(data)
const result = getDetail(id)
return result.then(data => {
return new SuccessModel(data)
})
}
if (method === 'POST' && req.path === '/api/blog/new'){
const loginCheckResult = loginCheck(req)
if (loginCheckResult) {
return loginCheckResult
}
req.body.author = req.session.username
const result = newBlog(req.body)
return result.then( data => {
return new SuccessModel(data)
})
}
if (method === 'POST' && req.path === '/api/blog/update'){
const loginCheckResult = loginCheck(req)
if (loginCheckResult) {
return loginCheckResult
}
const result = updateBlog(id, req.body)
return result.then( val => {
return val?new SuccessModel():new ErrorModel('更新博客失败')
})
}
if (method === 'POST' && req.path === '/api/blog/del'){
const loginCheckResult = loginCheck(req)
if (loginCheckResult) {
return loginCheckResult
}
const author = req.session.username
const result = delBlog(id,author)
return result.then( val => {
return val?new SuccessModel():new ErrorModel('删除博客失败')
})
}
}
module.exports = handleBlogRouter
和老师一点一点敲的，不知道为什么报错
(node:10020) UnhandledPromiseRejectionWarning: TypeError: Cannot read property ‘isadmin’ of undefined
at handleBlogRouter (G:\learningWeb\node.js\blog1\src\router\blog.js:27:26)
at get.then.then.postData (G:\learningWeb\node.js\blog1\app.js:102:28)
at process._tickCallback (internal/process/next_tick.js:68:7)
(node:10020) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
我尝试打印 req.query 发现是NULL ？
可是我在 app.js中打印req.qeury 又是有isadmin的懵了
const querystring = require('querystring')
const handleBlogRouter = require('./src/router/blog')
const handleUserRouter = require('./src/router/user')
const { get, set } = require('./src/db/redis')
const getCookieExpires = () => {
const d = new Date()
d.setTime(d.getTime() + (24 * 60 * 60 * 1000))
return d.toGMTString()
}
const getPostData = (req) => {
const promise = new Promise((resolve, reject) => {
if (req.method !== 'POST' || req.headers['content-type'] !== 'application/json'){
resolve({})
return
}
let postData = ''
req.on('data', chunk => {
postData += chunk.toString()
})
req.on('end', () => {
if (!postData){
resolve({})
return
}
resolve(
JSON.parse(postData)
)
})
})
return promise
}
const serverHandle = (req, res) => {
// 设置返回格式 JSON
res.setHeader('content-type',"application/json")
// 获取 path
const url = req.url
req.path = url.split('?')[0]
// 解析 query
req.query = querystring.parse(url.split('?')[1])
console.log(req.query)
// 解析 cookie
req.cookie = {}
const cookieStr = req.headers.cookie || ''
cookieStr.split(';').forEach( item => {
if(!item) {
return
}
const arr = item.split('=')
const key = arr[0].trim()
const val = arr[1].trim()
req.cookie[key] = val
})
// 解析 session
// let needSetCookie = false
// let userId = req.cookie.userid
// if (userId) {
// if (!SESSION_DATA[userId])
// SESSION_DATA[userId] = {}
// req.session = SESSION_DATA[userId]
// } else {
// needSetCookie = true
// userId = `${Date.now()}_${Math.random()}`
// SESSION_DATA[userId] = {}
// }
// req.session = SESSION_DATA[userId]
// 解析 session
let needSetCookie = false
let userId = req.cookie.userid
if(!userId) {
needSetCookie = true
userId = `${Date.now()}_${Math.random()}`
set(userId, {})
}
// 获取 session
req.sessionId = userId
get(req.sessionId).then(sessionData => {
if(sessionData == null) {
set(req.sessionId, {})
req.session = {}
} else {
req.session = sessionData
}
console.log('req.session ', req.session)
return getPostData(req)
}).then( postData => {
req.body = postData
//处理 blog 路由
const blogResult = handleBlogRouter(req, res)
if (blogResult){
blogResult.then( blogData => {
if(needSetCookie) {
res.setHeader('Set-Cookie', `userid=${userId}; path=/; httpOnly; expires=${getCookieExpires()}`)
}
res.end(
JSON.stringify(blogData)
)
})
return
}
const userResult = handleUserRouter(req, res)
if (userResult){
userResult.then(userData => {
if(needSetCookie) {
res.setHeader('Set-Cookie', `userid=${userId}; path=/; httpOnly; expires=${getCookieExpires()}`)
}
res.end(
JSON.stringify(userData)
)
})
return
}
res.writeHead(404, {"Content-type": "text/plain"})
res.write("404 Not Found\n")
res.end()
})
}
module.exports = serverHandle
最后发现还有几个地方和老师不一样
以下均在无痕页面访问
1.我登录localhost:8080/admin.html
并不会弹出那个数据错误之类的 但是进去编辑和删除无法做到 会显示操作错误
2.我登录localhost:8080/index.html 再加上isadmin之后就会报以上的错误
3.登录localhost:8080/login.html 错误登录没有报提示信息，正确登录会跳转到 admin.html
然而网址不会加上isadmin 就是可以操作其他人的博客
问题有点多···如果老师可以花时间看的话，感激万分。
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1回答
双越
2019-08-06 09:09:48
-
如果是一个比较怪异的 bug ，且不影响学习进度，就先别管它。先把课程整体看完，再回来搞这些边边角角的东西。
有任何疑惑可以回复我~ 2019-08-06 19:29:41
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