关于前后端分离，前端日常开发模式

作用

后端提供restful api接口
前端提供页面展示

而前端日常开发时，大致有以下几种开发模式(vue2.0版本)

使用npm run dev模式，且通过配置proxyTable，将axios的前端请求转发给实际的后端地址（常用）

项目根下的config目录

index.js

'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  dev: {
    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {
      '/api': {
        target: 'http://127.0.0.1:8080', // 后端接口地址
        changeOrigin: true, // 是否允许跨域
        pathRewrite: {
          '^/api': '' // 重写
        }
      }
    },

    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 80, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: true,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    // Use Eslint Loader?
    // If true, your code will be linted during bundling and
    // linting errors and warnings will be shown in the console.
    useEslint: true,
    // If true, eslint errors and warnings will also be shown in the error overlay
    // in the browser.
    showEslintErrorsInOverlay: false,

    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-module-eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    cssSourceMap: true
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',

    /**
     * Source Maps
     */

    productionSourceMap: false,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to true, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: true,
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // npm run build --report
    // Set to true or false to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  }
}

dev.env.js

'use strict'
const merge = require('webpack-merge')
const prodEnv = require('./prod.env')

module.exports = merge(prodEnv, {
  NODE_ENV: '"development"',
  BASE_API: '"/api"'
})

prod.env.js

'use strict'
module.exports = {
  NODE_ENV: '"production"',
  // BASE_API: '"http://georege.slhk.com/"'
}

axios-filter.js

import axios from 'axios'
import { Message } from 'element-ui'
import router from '@/router'

// 根据不同环境自动读取不同的baseurl
if (process.env.NODE_ENV === 'development') {
  axios.defaults.baseURL = process.env.BASE_API
}
// 读取cookie中的csrftoken
axios.defaults.xsrfCookieName = 'csrftoken'
// axios header设置X-CSRFTOKEN
axios.defaults.xsrfHeaderName = 'X-CSRFTOKEN'
// 设置Content-Type
axios.defaults.headers = {
  'Content-Type': 'application/json;charset=UTF-8'
}
// 设置超时时间
axios.defaults.timeout = 50000

// request拦截器
axios.interceptors.request.use(
  config => {
    // sessionStorage 如果存在jwt token
    if (sessionStorage.token) {
      // 则JWT token认证格式，写入header
      config.headers.Authorization = 'JWt ' + sessionStorage.token
      // console.log(sessionStorage.token)
    }
    return config
  },
  error => {
    // console.log(error)
    return Promise.reject(error)
  }
)
// reponse自定义拦截器 start
function customAxiosResponseInterceptor () {
  const interceptor = axios.interceptors.response.use(
    response => response,
    error => {
      // console.log(error)
      var config = error.config
      if (error.response.status === 401) {
        axios.interceptors.response.eject(interceptor)
        const v = sessionStorage.getItem('refresh')

        if (typeof v === 'undefined' || v === null || v === '') {
          Message({
            showClose: true,
            message: error.response.data.msg,
            type: 'error'
          })
        } else {
          let data = { 'refresh': v }
          return axios.post('/api-token-refresh/', data).then(response => {
            sessionStorage.setItem('token', response.data.access)
            console.log('刷新 access token 成功')
            // 重新发送请求
            return axios(config)
          }).catch(error => {
            Message({
              showClose: true,
              message: '登录超时，请重新登录！！！',
              type: 'error'
            })
            redirectLoginWithQuery()
            console.log(error)
            return Promise.reject(error)
          }).finally(customAxiosResponseInterceptor)
        }
      } else {
        console.log(error.response)
        // Message({
        //   showClose: true,
        //   message: error.response.data.msg,
        //   type: 'error'
        // })
        return Promise.reject(error)
      }
    }
  )
}
customAxiosResponseInterceptor()
// reponse自定义拦截器 end
// login with redirect
function redirectLoginWithQuery () {
  router.push({
    path: '/login',
    query: {
      redirect: router.currentRoute.fullPath
    }
  })
}
export default axios

使用npm run build模式，直接dist下打包编译出生产所需静态文件

使用npm run watch模式（需要安装watch组件，且需要配置package.json文件中的scripts的内容）

package.json

"scripts": {
    "dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
    "start": "npm run dev",
    "lint": "eslint --ext .js,.vue src",
    "build": "node build/build.js",
    "watch": "nodemon --watch src -e html,vue,js,less build/build.js"
  },

关于前后端分离，前端日常开发模式

作用

而前端日常开发时，大致有以下几种开发模式(vue2.0版本)

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