// Copyright 2019 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

//

// https://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.

// [START run_broken_service]

const express = require('express');

const app = express();

app.get('/', (req, res) => {

console.log('hello: received request.');

// [START run_broken_service_problem]

const {NAME} = process.env;

if (!NAME) {

// Plain error logs do not appear in Stackdriver Error Reporting.

console.error('Environment validation failed.');

console.error(new Error('Missing required server parameter'));

return res.status(500).send('Internal Server Error');

}

// [END run_broken_service_problem]

res.send(`Hello ${NAME}!`);

});

// [END run_broken_service]

app.get('/improved', (req, res) => {

console.log('hello: received request.');

// [START run_broken_service_upgrade]

const NAME = process.env.NAME || 'World';

if (!process.env.NAME) {

console.log(

JSON.stringify({

severity: 'WARNING',

message: `NAME not set, default to '${NAME}'`,

})

);

}

// [END run_broken_service_upgrade]

res.send(`Hello ${NAME}!`);

});

// [START run_broken_service]

const port = process.env.PORT || 8080;

app.listen(port, () => {

console.log(`hello: listening on port ${port}`);

});

// [END run_broken_service]