安装mockjs和express

npm install  mockjs express --save

新建api.json

api.josn主要是放请求的json数据，有新增的请求，只需要在api.json添加即可。

{"login": [{"url": "/login","desc": "接口描述","res": {"message": "成功","code": 1,"data": {"loginName": "@cword(4,10)"}}}],"loginTest": [{"url": "/loginTest","desc": "接口描述","res": {"message": "成功","code": 1,"data": {"loginName": "@cword(4,10)"}}}]
}

新建server.js

server.js主要是做mock的服务器。
1.创建一个服务。
2.读取api.json文件内容
3.拦截请求，返回匹配的数据

const express = require('express');
const path = require('path');
const fs = require('fs');
const Mock = require('mockjs');const app = express();
const port = 5050;
const apiPath = path.join(__dirname, './api.json');
let apiData = {};app.listen(port, function () {console.info('mock server is  listening at ' + port)
});//读取文件
let getApi = () => {let readStream = fs.createReadStream(apiPath, {encoding: 'utf8'});readStream.on('data', (chunk) => {apiData = JSON.parse(chunk)});readStream.on('end', () => {console.info('读取已完成..');});
}fs.watchFile(apiPath, () => {getApi();console.info('mock server update');
});getApi();app.use((req, res, next) => {const originalUrl = req.originalUrl;let data = undefined;//匹配路径for (let url in apiData) {let findItem = apiData[url].find((result) => {if (result.url === originalUrl) {return result}});if (findItem !== undefined) {data = Mock.mock(findItem.res);break;}}res.set('Access-Control-Allow-Origin', '*');res.set('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE, OPTIONS');res.set('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, Authorization');//返回数据data !== undefined ? res.send(data) : res.sendStatus(404);next();
});

项目地址：https://github.com/rainbowChenhong/mock-server.git