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JavaScriptnodejs+koa2 实现模仿springMVC框架
发布时间: 2021年1月13日 | 浏览:
| 分类:js开发
koa2-MVC架构---------后端技术做前端---------后端技术做前端环境：nodejs开发工具：Visual Studio Code(下文简称：VSC)环境安装，工具安装及中文自行百度，环境调整好后开始进入正题。自行百度1、在硬盘上新增一个文件夹，打开VSC，点击‘添加工作区文件夹'，如果没有欢迎‘使用页面'，点击--文件--新建窗口，效果如下图：2、添加vsc调试。Shift+ctrl+p，输入框内输入：launch.json选择刚刚的文件夹3、目录结构从低到高one by one3-1、package.json
{
"name": "koa2mcv",
"version": "1.0.0",
"description": "Hello Koa 2 example with MVC",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"author": "baba",
"dependencies": {
"koa": "2.11.0",
"koa-router": "8.0.8",
"koa-bodyparser": "4.3.0",
"koa-static-plus": "0.1.1",
"koa-view": "2.1.3",
"koa-jwt": "4.0.0",
"koa-log4": "2.3.2",
"jsonwebtoken": "8.5.1",
"nunjucks": "3.2.1",
"mime": "2.4.5",
"mz": "2.7.0"
}
}
{
"name": "koa2mcv",
"version": "1.0.0",
"description": "Hello Koa 2 example with MVC",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"author": "baba",
"dependencies": {
"koa": "2.11.0",
"koa-router": "8.0.8",
"koa-bodyparser": "4.3.0",
"koa-static-plus": "0.1.1",
"koa-view": "2.1.3",
"koa-jwt": "4.0.0",
"koa-log4": "2.3.2",
"jsonwebtoken": "8.5.1",
"nunjucks": "3.2.1",
"mime": "2.4.5",
"mz": "2.7.0"
}
}参数介绍：name项目名称、version版本号、description项目描述、main项目启动文件、scripts启动快捷设置，author作者，dependencies第3方中间件名称及版本。3-2、app.js
//启动服务
require('./config/init').startServer();
//启动服务
require('./config/init').startServer();启动相关配置，封装到config/init.js中，启动文件直接引用即可。3-3、views存放html页面3-4、static存放静态文件，css,js,font等3-5、src存放业务控制，类似于springMVC中的controller、service。3-6、config存放核心配置文件。3-6-1、init.js项目核心。异常友好处理
function handler(){
return async (ctx, next) => {
const start = new Date().getTime();
var urlReq=ctx.request.url;
if(urlReq !== '/favicon.ico'){
console.log(`请求地址：${ctx.request.method} ${urlReq}`);
try {
let params =Object.assign({}, ctx.request.query, ctx.request.body);
if(config["token"].excludeUrl.indexOf(urlReq) == -1 && !tokenFunction.varifyToken(params.token)){
ctx.status =401;
}else{
await next();
}
} catch (error) {
ctx.status=401;
console.log(`错误！无法获取token参数`);
}finally{
let err={};
if(!ctx.status){
err.status = 500;
}else if(ctx.status==200){
return;
}else{
err.status = ctx.status;
}
switch(err.status){
case 404:
err.url = config["server-name"]+'/static/public/404.html';
err.message="资源不存在！";
break;
case 401:
err.url = config["server-name"]+'/static/public/10000.html';
err.message="登陆失效！请重新登陆！";
break;
case 500:
err.url = config["server-name"]+'/static/public/500.html';
err.message="系统内部错误！";
break;
}
switch(ctx.request.type){
case 'application/json':
ctx.type = 'application/json';
ctx.body = {errorCode:err.errorCode,message: err.message}
break;
default:
ctx.type = 'text/html';
ctx.redirect(err.url);
break;
}
}
}
const ms = new Date().getTime() - start;
console.log(`请求消耗时间: ${ms}ms`);
}
}
function handler(){
return async (ctx, next) => {
const start = new Date().getTime();
var urlReq=ctx.request.url;
if(urlReq !== '/favicon.ico'){
console.log(`请求地址：${ctx.request.method} ${urlReq}`);
try {
let params =Object.assign({}, ctx.request.query, ctx.request.body);
if(config["token"].excludeUrl.indexOf(urlReq) == -1 && !tokenFunction.varifyToken(params.token)){
ctx.status =401;
}else{
await next();
}
} catch (error) {
ctx.status=401;
console.log(`错误！无法获取token参数`);
}finally{
let err={};
if(!ctx.status){
err.status = 500;
}else if(ctx.status==200){
return;
}else{
err.status = ctx.status;
}
switch(err.status){
case 404:
err.url = config["server-name"]+'/static/public/404.html';
err.message="资源不存在！";
break;
case 401:
err.url = config["server-name"]+'/static/public/10000.html';
err.message="登陆失效！请重新登陆！";
break;
case 500:
err.url = config["server-name"]+'/static/public/500.html';
err.message="系统内部错误！";
break;
}
switch(ctx.request.type){
case 'application/json':
ctx.type = 'application/json';
ctx.body = {errorCode:err.errorCode,message: err.message}
break;
default:
ctx.type = 'text/html';
ctx.redirect(err.url);
break;
}
}
}
const ms = new Date().getTime() - start;
console.log(`请求消耗时间: ${ms}ms`);
}
}路由配置
function controller(){
const router = new koaRouter({
prefix: config["server-name"]
});
function findJsonFile(rootpathStr){
fs.readdirSync(rootpathStr).forEach(function (item, index) {
let fPath = path.join(rootpathStr,item);
let stat = fs.statSync(fPath);
if(stat.isDirectory() === true) {
findJsonFile(fPath);
}
if (stat.isFile() === true&&fPath.endsWith('.js')) {
var mapping = require(fPath);
for (var url in mapping) {
if (url.startsWith('GET ')) {
router.get(url.substring(4), mapping[url]);
} else if (url.startsWith('POST ')) {
router.post(url.substring(5), mapping[url]);
} else if (url.startsWith('PUT ')) {
router.put(url.substring(4), mapping[url]);
} else if (url.startsWith('DELETE ')) {
router.del(url.substring(7), mapping[url]);
}
console.log(`注册 URL: ${url}`);
}
}
});
}
findJsonFile(rootpath + 'src');
return router.routes();
}
function controller(){
const router = new koaRouter({
prefix: config["server-name"]
});
function findJsonFile(rootpathStr){
fs.readdirSync(rootpathStr).forEach(function (item, index) {
let fPath = path.join(rootpathStr,item);
let stat = fs.statSync(fPath);
if(stat.isDirectory() === true) {
findJsonFile(fPath);
}
if (stat.isFile() === true&&fPath.endsWith('.js')) {
var mapping = require(fPath);
for (var url in mapping) {
if (url.startsWith('GET ')) {
router.get(url.substring(4), mapping[url]);
} else if (url.startsWith('POST ')) {
router.post(url.substring(5), mapping[url]);
} else if (url.startsWith('PUT ')) {
router.put(url.substring(4), mapping[url]);
} else if (url.startsWith('DELETE ')) {
router.del(url.substring(7), mapping[url]);
}
console.log(`注册 URL: ${url}`);
}
}
});
}
findJsonFile(rootpath + 'src');
return router.routes();
}视图渲染
function templating() {
var
autoescape = config['templating-autoescape'] === null ? true : config['templating-autoescape'],
noCache = config['templating-noCache'] === null ? false : config['templating-noCache'],
watch = config['templating-watch'] === null ? false : config['templating-watch'],
throwOnUndefined = config['templating-throwOnUndefined'] === null ? false :config['templating-throwOnUndefined'],
env = new nunjucks.Environment(
new nunjucks.FileSystemLoader(rootpath+'views', {
noCache: noCache,
watch: watch,
}), {
autoescape: autoescape,
throwOnUndefined: throwOnUndefined
});
if (config['templating-filters'] != null) {
for (var f in config['templating-filters']) {
env.addFilter(f, config['templating-filters'][f]);
}
}
return async (ctx, next) => {
ctx.render = function (view, model) {
ctx.response.body = env.render(view, Object.assign({}, ctx.state || {}, model || {}));
ctx.response.type = 'text/html';
};
await next();
};
}
function templating() {
var
autoescape = config['templating-autoescape'] === null ? true : config['templating-autoescape'],
noCache = config['templating-noCache'] === null ? false : config['templating-noCache'],
watch = config['templating-watch'] === null ? false : config['templating-watch'],
throwOnUndefined = config['templating-throwOnUndefined'] === null ? false :config['templating-throwOnUndefined'],
env = new nunjucks.Environment(
new nunjucks.FileSystemLoader(rootpath+'views', {
noCache: noCache,
watch: watch,
}), {
autoescape: autoescape,
throwOnUndefined: throwOnUndefined
});
if (config['templating-filters'] != null) {
for (var f in config['templating-filters']) {
env.addFilter(f, config['templating-filters'][f]);
}
}
return async (ctx, next) => {
ctx.render = function (view, model) {
ctx.response.body = env.render(view, Object.assign({}, ctx.state || {}, model || {}));
ctx.response.type = 'text/html';
};
await next();
};
}启动构建
function startServer(){
const app = new koa();
app.use(koaStaticPlus(rootpath+'static', {
pathPrefix: config["server-name"]+'/static'
})
);
app.use(koaBodyParser());
app.use(handler());
app.use(templating());
app.use(controller());
app.listen(config["server-port"]);
}
function startServer(){
const app = new koa();
app.use(koaStaticPlus(rootpath+'static', {
pathPrefix: config["server-name"]+'/static'
})
);
app.use(koaBodyParser());
app.use(handler());
app.use(templating());
app.use(controller());
app.listen(config["server-port"]);
}3-6-2、config.js项目参数配置。
module.exports ={
'server-name':'/koa',
'server-port':3000,
"templating-noCache":true,
"templating-watch":true,
"templating-autoescape":null,
"templating-throwOnUndefined":null,
"templating-filters":null,
"token":{
"excludeUrl":[
"/koa/login",
"/koa/dologin"
],
"timeout":1000 * 60 * 60 * 24 * 7,
"secret":"jiaobaba"
}
}
module.exports ={
'server-name':'/koa',
'server-port':3000,
"templating-noCache":true,
"templating-watch":true,
"templating-autoescape":null,
"templating-throwOnUndefined":null,
"templating-filters":null,
"token":{
"excludeUrl":[
"/koa/login",
"/koa/dologin"
],
"timeout":1000 * 60 * 60 * 24 * 7,
"secret":"jiaobaba"
}
}3-6-3、token.js项目token相关方法封装。
const jwt = require("jsonwebtoken");
const config = require('./config');
/**
* 创建token的方法
*/
let createToken = (data)=>{
let obj = {};
//存入token的数据
obj.data = data || {};
//token的创建时间
obj.ctime = (new Date()).getTime();
return jwt.sign(obj,config["token"].secret);
}
/**
* 验证token是否合法的方法
* @param {*} token
*/
let varifyToken = (token)=>{
let result = null;
try{
let {data,ctime,expiresIn} = jwt.verify(token,config["token"].secret);
let nowTime = (new Date()).getTime();
if(nowTime-ctime
result = data;
}
}catch(error){
}
return result;
}
module.exports = {
createToken,
varifyToken
};
const jwt = require("jsonwebtoken");
const config = require('./config');
/**
* 创建token的方法
*/
let createToken = (data)=>{
let obj = {};
//存入token的数据
obj.data = data || {};
//token的创建时间
obj.ctime = (new Date()).getTime();
return jwt.sign(obj,config["token"].secret);
}
/**
* 验证token是否合法的方法
* @param {*} token
*/
let varifyToken = (token)=>{
let result = null;
try{
let {data,ctime,expiresIn} = jwt.verify(token,config["token"].secret);
let nowTime = (new Date()).getTime();
if(nowTime-ctime
result = data;
}
}catch(error){
}
return result;
}
module.exports = {
createToken,
varifyToken
};3-6-4、logger.js项目日志配置文件。4、项目结构构建结束，接着引入所有依赖包，在终端中执行‘npm install' ,会下载package.json中dependencies所有包，以及这些包所依赖的包。执行后项目结构会增加两个文件5、编写测试用例，在src下新建hello.js。
//token
const token = require('../config/token');
var fn_hello = async (ctx, next) => {
var name = ctx.params.name;
ctx.response.body = `
};
var fn_index = async (ctx, next) => {
ctx.response.body = `
`;
};
var fn_signin = async (ctx, next) => {
var
name = ctx.request.body.name || '',
password = ctx.request.body.password || '';
console.log(`登陆名: ${name}, 密码: ${password}`);
ctx.response.body = `
you token:
${token.createToken({user: name,password: password})}`;
};
module.exports = {
'GET /hello/:name': fn_hello,
'GET /login': fn_index,
'POST /dologin': fn_signin
};
//token
const token = require('../config/token');
var fn_hello = async (ctx, next) => {
var name = ctx.params.name;
ctx.response.body = `
};
var fn_index = async (ctx, next) => {
ctx.response.body = `
`;
};
var fn_signin = async (ctx, next) => {
var
name = ctx.request.body.name || '',
password = ctx.request.body.password || '';
console.log(`登陆名: ${name}, 密码: ${password}`);
ctx.response.body = `
you token:
${token.createToken({user: name,password: password})}`;
};
module.exports = {
'GET /hello/:name': fn_hello,
'GET /login': fn_index,
'POST /dologin': fn_signin
};6、启动项目启动成功测试访问：http://127.0.0.1:3000/koa/loginhttp://127.0.0.1:3000/koa/login输入值获取token先不用带token进行访问拦截成功带上token 进行访问测试成功！
{
"name": "koa2mcv",
"version": "1.0.0",
"description": "Hello Koa 2 example with MVC",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"author": "baba",
"dependencies": {
"koa": "2.11.0",
"koa-router": "8.0.8",
"koa-bodyparser": "4.3.0",
"koa-static-plus": "0.1.1",
"koa-view": "2.1.3",
"koa-jwt": "4.0.0",
"koa-log4": "2.3.2",
"jsonwebtoken": "8.5.1",
"nunjucks": "3.2.1",
"mime": "2.4.5",
"mz": "2.7.0"
}
}
{
"name": "koa2mcv",
"version": "1.0.0",
"description": "Hello Koa 2 example with MVC",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"author": "baba",
"dependencies": {
"koa": "2.11.0",
"koa-router": "8.0.8",
"koa-bodyparser": "4.3.0",
"koa-static-plus": "0.1.1",
"koa-view": "2.1.3",
"koa-jwt": "4.0.0",
"koa-log4": "2.3.2",
"jsonwebtoken": "8.5.1",
"nunjucks": "3.2.1",
"mime": "2.4.5",
"mz": "2.7.0"
}
}参数介绍：name项目名称、version版本号、description项目描述、main项目启动文件、scripts启动快捷设置，author作者，dependencies第3方中间件名称及版本。3-2、app.js
//启动服务
require('./config/init').startServer();
//启动服务
require('./config/init').startServer();启动相关配置，封装到config/init.js中，启动文件直接引用即可。3-3、views存放html页面3-4、static存放静态文件，css,js,font等3-5、src存放业务控制，类似于springMVC中的controller、service。3-6、config存放核心配置文件。3-6-1、init.js项目核心。异常友好处理
function handler(){
return async (ctx, next) => {
const start = new Date().getTime();
var urlReq=ctx.request.url;
if(urlReq !== '/favicon.ico'){
console.log(`请求地址：${ctx.request.method} ${urlReq}`);
try {
let params =Object.assign({}, ctx.request.query, ctx.request.body);
if(config["token"].excludeUrl.indexOf(urlReq) == -1 && !tokenFunction.varifyToken(params.token)){
ctx.status =401;
}else{
await next();
}
} catch (error) {
ctx.status=401;
console.log(`错误！无法获取token参数`);
}finally{
let err={};
if(!ctx.status){
err.status = 500;
}else if(ctx.status==200){
return;
}else{
err.status = ctx.status;
}
switch(err.status){
case 404:
err.url = config["server-name"]+'/static/public/404.html';
err.message="资源不存在！";
break;
case 401:
err.url = config["server-name"]+'/static/public/10000.html';
err.message="登陆失效！请重新登陆！";
break;
case 500:
err.url = config["server-name"]+'/static/public/500.html';
err.message="系统内部错误！";
break;
}
switch(ctx.request.type){
case 'application/json':
ctx.type = 'application/json';
ctx.body = {errorCode:err.errorCode,message: err.message}
break;
default:
ctx.type = 'text/html';
ctx.redirect(err.url);
break;
}
}
}
const ms = new Date().getTime() - start;
console.log(`请求消耗时间: ${ms}ms`);
}
}
function handler(){
return async (ctx, next) => {
const start = new Date().getTime();
var urlReq=ctx.request.url;
if(urlReq !== '/favicon.ico'){
console.log(`请求地址：${ctx.request.method} ${urlReq}`);
try {
let params =Object.assign({}, ctx.request.query, ctx.request.body);
if(config["token"].excludeUrl.indexOf(urlReq) == -1 && !tokenFunction.varifyToken(params.token)){
ctx.status =401;
}else{
await next();
}
} catch (error) {
ctx.status=401;
console.log(`错误！无法获取token参数`);
}finally{
let err={};
if(!ctx.status){
err.status = 500;
}else if(ctx.status==200){
return;
}else{
err.status = ctx.status;
}
switch(err.status){
case 404:
err.url = config["server-name"]+'/static/public/404.html';
err.message="资源不存在！";
break;
case 401:
err.url = config["server-name"]+'/static/public/10000.html';
err.message="登陆失效！请重新登陆！";
break;
case 500:
err.url = config["server-name"]+'/static/public/500.html';
err.message="系统内部错误！";
break;
}
switch(ctx.request.type){
case 'application/json':
ctx.type = 'application/json';
ctx.body = {errorCode:err.errorCode,message: err.message}
break;
default:
ctx.type = 'text/html';
ctx.redirect(err.url);
break;
}
}
}
const ms = new Date().getTime() - start;
console.log(`请求消耗时间: ${ms}ms`);
}
}路由配置
function controller(){
const router = new koaRouter({
prefix: config["server-name"]
});
function findJsonFile(rootpathStr){
fs.readdirSync(rootpathStr).forEach(function (item, index) {
let fPath = path.join(rootpathStr,item);
let stat = fs.statSync(fPath);
if(stat.isDirectory() === true) {
findJsonFile(fPath);
}
if (stat.isFile() === true&&fPath.endsWith('.js')) {
var mapping = require(fPath);
for (var url in mapping) {
if (url.startsWith('GET ')) {
router.get(url.substring(4), mapping[url]);
} else if (url.startsWith('POST ')) {
router.post(url.substring(5), mapping[url]);
} else if (url.startsWith('PUT ')) {
router.put(url.substring(4), mapping[url]);
} else if (url.startsWith('DELETE ')) {
router.del(url.substring(7), mapping[url]);
}
console.log(`注册 URL: ${url}`);
}
}
});
}
findJsonFile(rootpath + 'src');
return router.routes();
}
function controller(){
const router = new koaRouter({
prefix: config["server-name"]
});
function findJsonFile(rootpathStr){
fs.readdirSync(rootpathStr).forEach(function (item, index) {
let fPath = path.join(rootpathStr,item);
let stat = fs.statSync(fPath);
if(stat.isDirectory() === true) {
findJsonFile(fPath);
}
if (stat.isFile() === true&&fPath.endsWith('.js')) {
var mapping = require(fPath);
for (var url in mapping) {
if (url.startsWith('GET ')) {
router.get(url.substring(4), mapping[url]);
} else if (url.startsWith('POST ')) {
router.post(url.substring(5), mapping[url]);
} else if (url.startsWith('PUT ')) {
router.put(url.substring(4), mapping[url]);
} else if (url.startsWith('DELETE ')) {
router.del(url.substring(7), mapping[url]);
}
console.log(`注册 URL: ${url}`);
}
}
});
}
findJsonFile(rootpath + 'src');
return router.routes();
}视图渲染
function templating() {
var
autoescape = config['templating-autoescape'] === null ? true : config['templating-autoescape'],
noCache = config['templating-noCache'] === null ? false : config['templating-noCache'],
watch = config['templating-watch'] === null ? false : config['templating-watch'],
throwOnUndefined = config['templating-throwOnUndefined'] === null ? false :config['templating-throwOnUndefined'],
env = new nunjucks.Environment(
new nunjucks.FileSystemLoader(rootpath+'views', {
noCache: noCache,
watch: watch,
}), {
autoescape: autoescape,
throwOnUndefined: throwOnUndefined
});
if (config['templating-filters'] != null) {
for (var f in config['templating-filters']) {
env.addFilter(f, config['templating-filters'][f]);
}
}
return async (ctx, next) => {
ctx.render = function (view, model) {
ctx.response.body = env.render(view, Object.assign({}, ctx.state || {}, model || {}));
ctx.response.type = 'text/html';
};
await next();
};
}
function templating() {
var
autoescape = config['templating-autoescape'] === null ? true : config['templating-autoescape'],
noCache = config['templating-noCache'] === null ? false : config['templating-noCache'],
watch = config['templating-watch'] === null ? false : config['templating-watch'],
throwOnUndefined = config['templating-throwOnUndefined'] === null ? false :config['templating-throwOnUndefined'],
env = new nunjucks.Environment(
new nunjucks.FileSystemLoader(rootpath+'views', {
noCache: noCache,
watch: watch,
}), {
autoescape: autoescape,
throwOnUndefined: throwOnUndefined
});
if (config['templating-filters'] != null) {
for (var f in config['templating-filters']) {
env.addFilter(f, config['templating-filters'][f]);
}
}
return async (ctx, next) => {
ctx.render = function (view, model) {
ctx.response.body = env.render(view, Object.assign({}, ctx.state || {}, model || {}));
ctx.response.type = 'text/html';
};
await next();
};
}启动构建
function startServer(){
const app = new koa();
app.use(koaStaticPlus(rootpath+'static', {
pathPrefix: config["server-name"]+'/static'
})
);
app.use(koaBodyParser());
app.use(handler());
app.use(templating());
app.use(controller());
app.listen(config["server-port"]);
}
function startServer(){
const app = new koa();
app.use(koaStaticPlus(rootpath+'static', {
pathPrefix: config["server-name"]+'/static'
})
);
app.use(koaBodyParser());
app.use(handler());
app.use(templating());
app.use(controller());
app.listen(config["server-port"]);
}3-6-2、config.js项目参数配置。
module.exports ={
'server-name':'/koa',
'server-port':3000,
"templating-noCache":true,
"templating-watch":true,
"templating-autoescape":null,
"templating-throwOnUndefined":null,
"templating-filters":null,
"token":{
"excludeUrl":[
"/koa/login",
"/koa/dologin"
],
"timeout":1000 * 60 * 60 * 24 * 7,
"secret":"jiaobaba"
}
}
module.exports ={
'server-name':'/koa',
'server-port':3000,
"templating-noCache":true,
"templating-watch":true,
"templating-autoescape":null,
"templating-throwOnUndefined":null,
"templating-filters":null,
"token":{
"excludeUrl":[
"/koa/login",
"/koa/dologin"
],
"timeout":1000 * 60 * 60 * 24 * 7,
"secret":"jiaobaba"
}
}3-6-3、token.js项目token相关方法封装。
const jwt = require("jsonwebtoken");
const config = require('./config');
/**
* 创建token的方法
*/
let createToken = (data)=>{
let obj = {};
//存入token的数据
obj.data = data || {};
//token的创建时间
obj.ctime = (new Date()).getTime();
return jwt.sign(obj,config["token"].secret);
}
/**
* 验证token是否合法的方法
* @param {*} token
*/
let varifyToken = (token)=>{
let result = null;
try{
let {data,ctime,expiresIn} = jwt.verify(token,config["token"].secret);
let nowTime = (new Date()).getTime();
if(nowTime-ctime
result = data;
}
}catch(error){
}
return result;
}
module.exports = {
createToken,
varifyToken
};
const jwt = require("jsonwebtoken");
const config = require('./config');
/**
* 创建token的方法
*/
let createToken = (data)=>{
let obj = {};
//存入token的数据
obj.data = data || {};
//token的创建时间
obj.ctime = (new Date()).getTime();
return jwt.sign(obj,config["token"].secret);
}
/**
* 验证token是否合法的方法
* @param {*} token
*/
let varifyToken = (token)=>{
let result = null;
try{
let {data,ctime,expiresIn} = jwt.verify(token,config["token"].secret);
let nowTime = (new Date()).getTime();
if(nowTime-ctime
result = data;
}
}catch(error){
}
return result;
}
module.exports = {
createToken,
varifyToken
};3-6-4、logger.js项目日志配置文件。4、项目结构构建结束，接着引入所有依赖包，在终端中执行‘npm install' ,会下载package.json中dependencies所有包，以及这些包所依赖的包。执行后项目结构会增加两个文件5、编写测试用例，在src下新建hello.js。
//token
const token = require('../config/token');
var fn_hello = async (ctx, next) => {
var name = ctx.params.name;
ctx.response.body = `
Hello, ${name}!
`;};
var fn_index = async (ctx, next) => {
ctx.response.body = `
Index
`;
};
var fn_signin = async (ctx, next) => {
var
name = ctx.request.body.name || '',
password = ctx.request.body.password || '';
console.log(`登陆名: ${name}, 密码: ${password}`);
ctx.response.body = `
Welcome, ${name}!
you token:
${token.createToken({user: name,password: password})}`;
};
module.exports = {
'GET /hello/:name': fn_hello,
'GET /login': fn_index,
'POST /dologin': fn_signin
};
//token
const token = require('../config/token');
var fn_hello = async (ctx, next) => {
var name = ctx.params.name;
ctx.response.body = `
Hello, ${name}!
`;};
var fn_index = async (ctx, next) => {
ctx.response.body = `
Index
`;
};
var fn_signin = async (ctx, next) => {
var
name = ctx.request.body.name || '',
password = ctx.request.body.password || '';
console.log(`登陆名: ${name}, 密码: ${password}`);
ctx.response.body = `
Welcome, ${name}!
you token:
${token.createToken({user: name,password: password})}`;
};
module.exports = {
'GET /hello/:name': fn_hello,
'GET /login': fn_index,
'POST /dologin': fn_signin
};6、启动项目启动成功测试访问：http://127.0.0.1:3000/koa/loginhttp://127.0.0.1:3000/koa/login输入值获取token先不用带token进行访问拦截成功带上token 进行访问测试成功！
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