ethstats-server/app.js

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var express = require('express');
var app = express();
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var path = require('path');
var favicon = require('serve-favicon');
var bodyParser = require('body-parser');
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var Primus = require('primus'),
api,
client;
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var WS_SECRET = process.env.WS_SECRET || "eth-net-stats-has-a-secret";
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var Collection = require('./models/collection');
var Nodes = new Collection();
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var server = require('http').createServer(app);
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api = new Primus(server, {
transformer: 'websockets',
pathname: '/api',
parser: 'JSON'
});
api.use('emit', require('primus-emit'));
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api.use('spark-latency', require('primus-spark-latency'));
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var client = new Primus(server, {
transformer: 'websockets',
pathname: '/primus',
parser: 'JSON'
});
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var clientLatency = 0;
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client.use('emit', require('primus-emit'));
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api.on('connection', function(spark) {
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console.log('Latency: ', spark.latency);
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console.log(spark.id);
console.log(spark.address);
console.log(spark.query);
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spark.on('hello', function(data)
{
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console.log('Latency: ', spark.latency);
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console.log('Got hello data from ', spark.id);
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console.log(data);
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if(typeof data.secret === 'undefined' || data.secret !== WS_SECRET)
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{
spark.end(undefined, { reconnect: false });
return false;
}
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if(typeof data.id !== 'undefined' && typeof data.info !== 'undefined')
{
data.ip = spark.address.ip;
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data.spark = spark.id;
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data.latency = spark.latency;
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var info = Nodes.add(data);
spark.emit('ready');
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client.write({action: 'add', data: info});
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var blockPropagationChart = Nodes.blockPropagationChart();
client.write({action: 'blockPropagationChart', data: blockPropagationChart});
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var uncleCount = Nodes.getUncleCount();
client.write({action: 'uncleCount', data: uncleCount});
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}
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});
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spark.on('update', function(data)
{
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console.log('Latency: ', spark.latency);
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console.log('Got update from ' + spark.id);
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if(typeof data.id !== 'undefined' && typeof data.stats !== 'undefined')
{
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data.stats.latency = spark.latency;
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var stats = Nodes.update(data.id, data.stats);
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if(stats !== false)
{
client.write({action: 'update', data: stats});
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var blockPropagationChart = Nodes.blockPropagationChart();
client.write({action: 'blockPropagationChart', data: blockPropagationChart});
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var uncleCount = Nodes.getUncleCount();
client.write({action: 'uncleCount', data: uncleCount});
}
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}
});
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spark.on('node-ping', function(data){
spark.emit('node-pong');
});
spark.on('latency', function(data)
{
if(typeof data.id !== 'undefined')
{
var stats = Nodes.updateLatency(data.id, data.latency);
client.write({action: 'latency', data: stats});
}
});
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spark.on('end', function(data)
{
var stats = Nodes.inactive(spark.id);
client.write({action: 'inactive', data: stats});
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});
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});
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client.on('connection', function(spark) {
console.log(spark.id);
console.log(spark.address);
console.log(spark.query);
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spark.on('ready', function(data){
spark.emit('init', {nodes: Nodes.all()});
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var blockPropagationChart = Nodes.blockPropagationChart();
spark.write({action: 'blockPropagationChart', data: blockPropagationChart});
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var uncleCount = Nodes.getUncleCount();
spark.write({action: 'uncleCount', data: uncleCount});
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});
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spark.on('client-pong', function(data) {
var latency = Math.ceil(((new Date()).getTime() - clientLatency)/2);
spark.emit('client-latency', { latency: latency });
});
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});
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var latencyTimeout = setInterval(function(){
clientLatency = (new Date()).getTime();
client.write({action: 'client-ping'});
}, 5000);
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// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
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app.use(favicon(path.join(__dirname, '/public/images/favicon.png')));
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app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'public')));
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app.get('/', function(req, res) {
res.render('index', { title: 'Ethereum Network Status' });
});
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// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
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server.listen(process.env.PORT || 3000);
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module.exports = app;