Vue代理报错404问题及解决(vue配置proxy)

Vue代理报错404问题

问题描述:

代理后出现404:

第一种路径拼接 /api 情况

const path = require("path");

function resolve(dir) {
    return path.resolve(__dirname, dir)
}
module.exports = {
    publicPath: process.env.NODE_ENV === "production" ? "./" : "/",
    assetsDir: "assets",
    configureWebpack: {
        resolve: {
            extensions: [".js", ".vue", ".json"],
            alias: {
                "@": resolve("src"),
                "assets": resolve("src/assets"),
                "css": resolve("src/assets/css"),
                "images": resolve("src/assets/images"),
                "views": resolve("src/views"),
                "components": resolve("src/components"),
                "api": resolve("src/api"),
                "mixins": resolve("src/mixins"),
                "store": resolve("src/store"),
                "service": resolve("src/service"),
            }
        }
    },
    devServer: {
        port: 8081,
        hot: true,
        // open: "Chrome",
        proxy: {
            // change xxx-api/login => mock/login
            // detail: https://cli.vuejs.org/config/#devserver-proxy
            "/api": {
                target: "https://www.xxxxxx.com/", 
                changeOrigin: true,
                secure: true,
                pathRewrite: {
                    "^/api": "/"
                }
            },
        },
    },
    css: {
        loaderOptions: {
            css: {},
            postcss: {
                plugins: [
                    require("postcss-px2rem")({
                        remUnit: 192
                    })
                ]
            }
        }
    },
    productionSourceMap: false,
};

使用如下:

结果如下:

缺点 :打包后的请求路径会多个 /api

第二种路径不变情况

这种写法也可以:

注意:这时候就按原来的路径就可以了;

结果如下:

缺点:配置多个代理要注意代理的先后顺序;

注意点

代理的顺序:从前往后匹配的,先匹配到哪个就用哪个;

新增说明:配置多个代理怎么搞?

配置多个代理怎么搞?

"use strict"
const path = require("path")
// const SkeletonWebpackPlugin = require("vue-skeleton-webpack-plugin")
const defaultSettings = require("./src/settings.js")

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || "xxx" // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9527 npm run dev OR npm run dev --port = 9527
const port = process.env.port || process.env.npm_config_port || 9527 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use "/" !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  // publicPath: process.env.ENV === "production" ? "/" : "/",
  publicPath: process.env.ENV === "production" ? "/" : "/",
  outputDir: "dist",
  assetsDir: "static",
  lintOnSave: process.env.NODE_ENV === "development",
  productionSourceMap: false,
  devServer: {
    host: "localhost",//target host
    port: port,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      [process.env.VUE_APP_BASE_BRAND_API]: {
        target: "http://10.44.62.64:8090",
        changeOrigin: true,
        pathRewrite: {
          ["^" + process.env.VUE_APP_BASE_BRAND_API]: ""
        }
      },
      // change xxx-api/login => mock/login
      // detail: https://cli.vuejs.org/config/#devserver-proxy
      [process.env.VUE_APP_BASE_API]: {
        // target: "http://localhost:3100",
        target: "http://xx.xxx.xx.x:3100",
        // target: `http://127.0.0.1:${port}/mock`,
        changeOrigin: true,
        pathRewrite: {
          ["^" + process.env.VUE_APP_BASE_API]: ""
        }
      },
    },
    // proxy:{
    //   // 当你请求是以/api开头的时候,则我帮你代理访问到http://localhost:3000
    //   // 例如:
    //   // /api/users  http://localhost:3000/api/users
    //   // 我们真是服务器接口是没有/api的
    //   "":{
    //     target:"http://localhost:31009",
    //     changeOrigin: true,// 如果接口跨域,需要进行这个参数配置
    //     pathRewrite:{"^":""}
    //   }
    // }
    // after: require("./mock/mock-server.js")
  },
  configureWebpack: {
    // provide the app"s title in webpack"s name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        "@": resolve("src")
      }
    }
  },
  // css: {
  //   extract: true // 是否使用css分离插件 ExtractTextPlugin(开启骨架屏必须这个配置)
  // },
  chainWebpack(config) {
    config.plugin("html").tap(args => {
      // 添加初始化变量
      args[0].monitorId = process.env.VUE_APP_MONITOR_ID
      return args
    })

    config.plugins.delete("preload") // TODO: need test
    config.plugins.delete("prefetch") // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule("svg")
      .exclude.add(resolve("src/icons"))
      .end()
    config.module
      .rule("icons")
      .test(/.svg$/)
      .include.add(resolve("src/icons"))
      .end()
      .use("svg-sprite-loader")
      .loader("svg-sprite-loader")
      .options({
        symbolId: "icon-[name]"
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule("vue")
      .use("vue-loader")
      .loader("vue-loader")
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === "development",
        config => config.devtool("cheap-source-map")
      )

    config
      .when(process.env.NODE_ENV !== "development",
        config => {
          config
            .plugin("ScriptExtHtmlWebpackPlugin")
            .after("html")
            .use("script-ext-html-webpack-plugin", [{
              // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime..*.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: "all",
              cacheGroups: {
                libs: {
                  name: "chunk-libs",
                  test: /[/]node_modules[/]/,
                  priority: 10,
                  chunks: "initial" // only package third parties that are initially dependent
                },
                elementUI: {
                  name: "chunk-elementUI", // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[/]node_modules[/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: "chunk-commons",
                  test: resolve("src/components"), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk("single")
        }
      )

    // 骨架屏配置
    // config
    //   .plugin("SkeletonWebpackPlugin")
    //   .use(new SkeletonWebpackPlugin({
    //     webpackConfig: {
    //       entry: {
    //         app: resolve("src/skeleton.js"),
    //       }
    //     },
    //     minimize: true,
    //     quiet: true,
    //     router: {
    //       mode: "history",
    //       routes: [{
    //         path: "*",
    //         skeletonId: "common-skeleton"
    //       }]
    //     }
    //   }))
  }
}

注意.env.development中的配置

NODE_ENV = "development"

# just a flag
ENV = "development"

# base api(当使用mock.js时,切换dev-api)
# VUE_APP_BASE_API = "/dev-api"
VUE_APP_BASE_API = ""

# vue-cli uses the VUE_CLI_BABEL_TRANSPILE_MODULES environment variable,
# to control whether the babel-plugin-dynamic-import-node plugin is enabled.
# It only does one thing by converting all import() to require().
# This configuration can significantly increase the speed of hot updates,
# when you have a large number of pages.
# Detail:  https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/babel-preset-app/index.js

VUE_CLI_BABEL_TRANSPILE_MODULES = true

# 图片和附件上传文件夹
VUE_APP_OSS_FOLDER="test/xxx/"

# 品牌项目 (这里为了代理,要多加个 /brand,当然可以自己定义)
VUE_APP_BASE_BRAND_API = "/brand"

配置了 .env.development 中的代理路径后,这样api接口js文件中就不用多写个 /brand,不用写成 /brand/saveOrUpdate ,请求路径也会存在 /brand ,baseURL拼接的原因,这样打包也并不影响,毕竟打包的是生产环境的路径;

总结

以上为个人经验,希望能给大家一个参考,也希望大家多多支持云海天教程。

原文地址:https://blog.csdn.net/weixin_42681295/article/details/117564605