mock数据时，http://localhost:8080/#/api/goods 无法访问到数据

最近学习一个vue-cli的项目，需要与后台进行数据交互，这里使用本地json数据来模仿后台数据交互流程。然而发现build文件夹下没有dev-server.js文件了，因为新版本的vue-webpack-template 中已经去掉了dev-server.js，取而代之的是webpack.dev.conf.js文件，所以可以在webpack.dev.conf.js里配置本地访问。

将build目录下的webpack.dev.conf.js文件改为：

'use strict'
const utils = require('./utils');
const webpack = require('webpack');
const config = require('../config');
const merge = require('webpack-merge');
const path = require('path');
const baseWebpackConfig = require('./webpack.base.conf');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin');
const portfinder = require('portfinder');

//引入数据，定义数据变量
var appData = require('../data.json');
var seller = appData.seller;
var goods = appData.goods;
var ratings = appData.ratings;

const HOST = process.env.HOST;
const PORT = process.env.PORT && Number(process.env.PORT);

const devWebpackConfig = merge(baseWebpackConfig, {
  module: {
    rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
  },
  // cheap-module-eval-source-map is faster for development
  devtool: config.dev.devtool,

  // these devServer options should be customized in /config/index.js
  devServer: {
    before(app) {
      app.get('/api/seller', (req, res) => {
        res.json({
          errno: 0,//定义规范，数据是正常的时候用0标识一下，真实的可以不为0的，根据业务方定的
          data: seller //用data是更好一点
        });
      }),
        app.get('/api/goods', (req, res) => {
          res.json({
            errno: 0,//定义规范，数据是正常的时候用0标识一下，真实的可以不为0的，根据业务方定的
            data: goods //用data是更好一点
          });
        }),
        app.get('/api/ratings', (req, res) => {
          res.json({
            errno: 0,//定义规范，数据是正常的时候用0标识一下，真实的可以不为0的，根据业务方定的
            data: ratings //用data是更好一点
          });
        });
    },
    clientLogLevel: 'warning',
    historyApiFallback: {
      rewrites: [
        { from: /.*/, to: path.posix.join(config.dev.assetsPublicPath, 'index.html') },
      ],
    },
    hot: true,
    contentBase: false, // since we use CopyWebpackPlugin.
    compress: true,
    host: HOST || config.dev.host,
    port: PORT || config.dev.port,
    open: config.dev.autoOpenBrowser,
    overlay: config.dev.errorOverlay
      ? { warnings: false, errors: true }
      : false,
    publicPath: config.dev.assetsPublicPath,
    proxy: config.dev.proxyTable,
    quiet: true, // necessary for FriendlyErrorsPlugin
    watchOptions: {
      poll: config.dev.poll,
    }
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': require('../config/dev.env')
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
    new webpack.NoEmitOnErrorsPlugin(),
    // https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: true
    }),
    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.dev.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
});
module.exports = new Promise((resolve, reject) => {
  portfinder.basePort = process.env.PORT || config.dev.port
  portfinder.getPort((err, port) => {
    if (err) {
      reject(err)
    } else {
      // publish the new Port, necessary for e2e tests
      process.env.PORT = port
      // add port to devServer config
      devWebpackConfig.devServer.port = port

      // Add FriendlyErrorsPlugin
      devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
        compilationSuccessInfo: {
          messages: [`Your application is running here: http://${devWebpackConfig.devServer.host}:${port}`],
        },
        onErrors: config.dev.notifyOnErrors
        ? utils.createNotifierCallback()
        : undefined
      }))

      resolve(devWebpackConfig)
    }
  })
})

　

npm run dev，启动后输入http://localhost:8080/api/seller，如果数据正常显示，则数据能正常返回

PS：Google可以用 jsonview 插件将返回数据格式化