// Copyright 2017 Google LLC

//

// 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_setup_nodejs_app]

if (process.env.NODE_ENV === 'production') {

// [START trace_setup_nodejs_implicit]

require('@google-cloud/trace-agent').start();

// [END trace_setup_nodejs_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('/', async (req, res) => {

// This outgoing HTTP request should be captured by Trace

try {

const {body} = await got(DISCOVERY_URL, {responseType: 'json'});

const names = 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_setup_nodejs_app]