Node.js开发博客项目笔记-初始化路由(博客列表、新增、更新、删除、详情、登录)(3)
工程目录
如图所示,工程目录如下:
我们在工程下新建src的目录,src目录下新建三个文件夹:
- controller:交互数据放到该目录下;
- model:model类放到该目录下;
- router:路由(模块接口处理)放到该目录下。
model目录
我们在model目录下,新建一个resModel.js,代码如下:
class BaseModel { constructor(data,message) { if(typeof data === 'string') { this.message = data; data = null; message = null; } if(data) { this.data = data; } if(message) { this.message = message; } } } class SuccessModel extends BaseModel { constructor(data,message) { super(data,message); this.errno = 0; } } class ErrorModel extends BaseModel { constructor(data,message) { super(data,message); this.errno = -1; } } module.exports = { SuccessModel, ErrorModel }
其作用就是对接口返回的数据做下拦截处理,对于返回成功或者失败的接口,我们除了返回响应的message,再整体添加一个errno状态码,其中errno返回0表示成功;errno返回-1表示失败。
controller目录
我们在controller目录下新建两个js的文件,把开发的这个博客项目分成两个模块:
- blog.js:(博客列表、添加博客、更新博客、删除博客、博客详情
- user.js:(目前只有登录)
当前两个的模块的数据都是假数据,blog.js代码如下:
// 获取博客列表 const getList = (keyword, author) => { // 返回假数据 return [ { id: 1, title: '标题A', content: '博客内容A', createTime: 1630630964139, author: 'zhangsan' }, { id: 2, title: '标题B', content: '博客内容B', createTime: 1630630999550, author: 'lisi' } ] } // 获取博客详情 const getDetail = (id) => { // 返回假数据 return { id: 1, title: '标题A', content: '博客内容A', createTime: 1630630964139, author: 'zhangsan' } } // 新建博客 const newBlog = (blogData = {}) => { return { id: 3 } } // 更新博客 const updateBlog = (id) => { return true; } // 删除博客 const delBlog =(id) => { return true; } module.exports = { getList, getDetail, newBlog, updateBlog, delBlog }
user.js代码如下:
const loginCheck = (username,password) => { // 使用假数据 if(username === 'zhangsan' && password === '123') { return true; } return false; } module.exports = { loginCheck }
router目录
router目录下也是分成两个路由模块:
- blog.js:博客相关的路由接口处理操作;
- user.js:用户相关(目前只有登录接口)的路由接口处理操作。
blog.js代码如下:
const { getList, getDetail, newBlog,updateBlog,delBlog } = require('../controller/blog'); const { SuccessModel, ErrorModel } = require('../model/resModel'); const handleBlogRouter = (req, res) => { const method = req.method; const id = req.query.id; // 获取博客列表 if (method === 'GET' && req.path === '/api/blog/list') { let keyword = req.query.keyword; let author = req.query.author; let resData = getList(keyword, author); return new SuccessModel(resData) } // 获取博客详情 if (method === 'GET' && req.path === '/api/blog/detail') { let id = req.query.id; let resData = getDetail(id); return new SuccessModel(resData); } // 新建博客 if (method === 'POST' && req.path === '/api/blog/new') { const data = newBlog(req.body); return new SuccessModel(data); } // 更新博客 if (method === 'POST' && req.path === '/api/blog/update') { const result = updateBlog(id); if(result) { return new SuccessModel(); } else { return new ErrorModel('更新博客失败'); } } // 删除博客 if (method === 'POST' && req.path === '/api/blog/del') { const result = delBlog(id); if(result) { return new SuccessModel(); } else { return new ErrorModel('删除博客失败'); } } } module.exports = handleBlogRouter;
user.js代码如下:
const { loginCheck } = require('../controller/user'); const { SuccessModel, ErrorModel } = require('../model/resModel'); const handleUserRouter = (req,res) => { const method = req.method; // 登录 if(method === 'POST' && req.path === '/api/user/login') { const { username,password } = req.body; const result = loginCheck(username,password); if(result) { return new SuccessModel(); } else { return new ErrorModel('登录失败'); } } } module.exports = handleUserRouter;
app.js
对node服务的处理代码如下:
const querystring = require('querystring'); const handleBlogRouter = require('./src/router/blog'); const handleUserRouter = require('./src/router/user'); // 处理post data const getPostData = (req) => { return new Promise((resolve,reject) => { if(req.method !== 'POST') { resolve({}); return; } if(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)); }) }) } const serverHandle = (req,res) => { res.setHeader('Content-type','application/json'); // 获取path const url = req.url; req.path = url.split('?')[0]; req.query = querystring.parse(url.split('?')[1]); // 处理post data getPostData(req).then(postData => { req.body = postData; // 处理blog路由 const blogData = handleBlogRouter(req,res); if(blogData) { res.end(JSON.stringify(blogData)); return; } // 处理user路由 const userData = handleUserRouter(req,res); if(userData) { res.end(JSON.stringify(userData)); return; } // 未命中路由 返回404 res.writeHead(404, {'Content-type': 'text/plain'}); res.write('404 not found \n'); res.end(); }) } module.exports = serverHandle;