// Copyright 2016 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';

const redis = require('redis');

const http = require('http');

const nconf = require('nconf');

// read in keys and secrets. You can store these in a variety of ways.

// I like to use a keys.json file that is in the .gitignore file,

// but you can also store them in environment variables

nconf.argv().env().file('keys.json');

// [START gae_flex_node_redis]

// Connect to a redis server provisioned over at

// Redis Labs. See the README for more info.

const client = redis

.createClient(

nconf.get('redisPort') || '6379',

nconf.get('redisHost') || '127.0.0.1',

{

auth_pass: nconf.get('redisKey'),

return_buffers: true,

}

)

.on('error', (err) => console.error('ERR:REDIS:', err));

// [END gae_flex_node_redis]]

// Create a simple little server.

http

.createServer((req, res) => {

// Track every IP that has visited this site

const listName = 'IPs';

client.lpush(listName, req.connection.remoteAddress);

client.ltrim(listName, 0, 25);

// push out a range

let iplist = '';

client.lrange(listName, 0, -1, (err, data) => {

if (err) {

console.log(err);

res.status(500).send(err.message);

return;

}

data.forEach((ip) => {

iplist += `${ip}; `;

});

res.writeHead(200, {'Content-Type': 'text/plain'});

res.end(iplist);

});

})

.listen(process.env.PORT || 8080);

console.log('started web process');