// Copyright 2015-2016, 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.

// [START app]

'use strict';

var express = require('express');

var winston = require('winston');

var app = express();

var logFile = '/var/log/app_engine/custom_logs/myapp.errors.log.json';

winston.add(winston.transports.File, {

filename: logFile

});

function report (err, req) {

var payload = {

serviceContext: {

service: 'myapp'

},

message: err.stack,

context: {

httpRequest: {

url: req.originalUrl,

method: req.method,

referrer: req.header('Referer'),

userAgent: req.header('User-Agent'),

remoteIp: req.ip,

responseStatusCode: 500

}

}

};

winston.error(payload);

}

app.get('/', function (req, res, next) {

next(new Error('something is wrong!'));

});

app.use(function (err, req, res, next) {

report(err, req);

res.status(500).send(err.message || 'Something broke!');

});

var server = app.listen(process.env.PORT || '8080', function () {

console.log('App listening on port %s', server.address().port);

console.log('Press Ctrl+C to quit.');

});

// [END app]