跨域问题webpack的代理

Posted 2021-04-29 web交流

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在前后端分离的年代前端经常会遇到跨域的问题，后端解决还好说，如果后端不愿已的话就得自己去操作了。

我们得在项目中找到webpack的config配置文件让后打开index.js

在index.js里面找到proxyTable这个配置，这个就是webpack专们为我们解决跨域准备的。

'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://api.douban.com/v2',//豆瓣的代理
        changeOrigin:true,
        pathRewrite:{
          '^/api':''
        }
      }
    },
    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: false,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-
    /**
     * 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
  }
}

在main.js里面

vue.prototype.Host = '/api'

在页面上用

console.log(this.Host,'代理')
    this.$Aiox.get(this.Host+'/movie/top250',{
      params:{
        count:10,
        start:0
      }
    }).then(res=>{
      console.log(res)
    }).catch(error=>{
      console.log(error)
    })