strapi/packages/strapi-admin/controllers/Admin.js

'use strict';

const fs = require('fs');
const path = require('path');

/**
 * A set of functions called "actions" for `Admin`
 */

module.exports = {

  index: async(ctx) => {
    try {
      // Send the HTML file with injected scripts
      ctx.body = strapi.admin.services.admin.generateAdminIndexFile();
    } catch (err) {
      ctx.body = err;
    }
  },

  pluginFile: async (ctx, next) => {
    try {
      // Will be served through the public middleware
      if (ctx.params.plugin === 'plugins') {
        return await next();
      }

      const file = fs.readFileSync(path.resolve(process.cwd(), 'plugins', ctx.params.plugin, 'admin', 'build', `${ctx.params.file}`));
      ctx.body = file;
    } catch (err) {
      ctx.body = ctx.notFound();
    }
  },

  file: async ctx => {
    try {
      const file = fs.readFileSync(path.resolve(__dirname, '..', 'admin', 'build', ctx.params.file));
      ctx.body = file;
    } catch (err) {
      // Fallback, render admin page
      ctx.body = strapi.admin.services.admin.generateAdminIndexFile();
    }
  }
};