text: /**
   * Copyright 2017, Google, Inc.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  'use strict';
  
  // [START trace_app]
  if (process.env.NODE_ENV === 'production') {
    // [START trace_setup_implicit]
    require('@google-cloud/trace-agent').start();
    // [END trace_setup_implicit]
  }
  
  const express = require('express');
  const got = require('got');
  
  const app = express();
  const DISCOVERY_URL = 'https://www.googleapis.com/discovery/v1/apis';
  
  // This incoming HTTP request should be captured by Trace
  app.get('/', (req, res) => {
    // This outgoing HTTP request should be captured by Trace
    got(DISCOVERY_URL, { json: true })
      .then((response) => {
        const names = response.body.items.map((item) => item.name);
  
        res
          .status(200)
          .send(names.join('\n'))
          .end();
      })
      .catch((err) => {
        console.error(err);
        res
          .status(500)
          .end();
      });
  });
  
  // Start the server
  const PORT = process.env.PORT || 8080;
  app.listen(PORT, () => {
    console.log(`App listening on port ${PORT}`);
    console.log('Press Ctrl+C to quit.');
  });
  // [END trace_app]
  