next.config.js

const { BundleAnalyzerPlugin } = require("webpack-bundle-analyzer");

const { ANALYZE } = process.env;
const pro = process.env.NODE_ENV === "production";
const test = process.env.NODE_TEST === "test"

// 开发模式下的页面缓存
// SSR页面缓存配置 https://github.com/zeit/next.js/blob/canary/examples/ssr-caching/server.js

const onDemandEntries = {
  // period (in ms) where the server will keep pages in the buffer
  maxInactiveAge: 25 * 1000,
  // number of pages that should be kept simultaneously without being disposed
  pagesBufferLength: 2
};

module.exports = {
  useFileSystemPublicRoutes: false,
  assetPrefix: pro ? (test ? "" : "http://public.duduapp.net/finance/pc-static") : "",
  ...(!pro && !test && { onDemandEntries }),
  exportPathMap: () => ({
    "/": { page: "/" },
  }),
  webpack: config => {
    if (ANALYZE) {
      config.plugins.push(
        new BundleAnalyzerPlugin({
          analyzerMode: "server",
          analyzerPort: 7777,
          openAnalyzer: true
        })
      );
    }
    return config;
  }
};