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server.js
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server.js
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// Internal require
const cluster = require('cluster');
const samtoolsWrap = require('./samtools-wrap.js');
var config = require("./config.json");
if (cluster.isMaster) {
// Code to run if we're in the master process
// Count the machine's CPUs
var cpuCount = Math.min(require('os').cpus().length, 10);
// Create a worker for each CPU
console.log('');
console.log('Starting server workers...');
console.log('===================');
for (var i = 0; i < cpuCount; i += 1) {
cluster.fork();
}
// Listen for dying workers
cluster.on('exit', function (worker) {
// Replace the dead worker, we're not sentimental
console.log('Worker %d died :(', worker.id);
cluster.fork();
});
} else {
// Includes
var compression = require('compression');
var express = require('express');
var cors = require('cors');
var bodyParser = require('body-parser');
// Create a new Express application
var app = express();
app.use(compression());
app.use(cors({
origin: true,
credentials: true
}));
app.use(bodyParser.urlencoded({
extended: true
})); // support encoded bodies
app.use(bodyParser.json()); // support json encoded bodies
app.get(config.urlPathPrefix + '/', function (req, res) {
var fileName = req.query.fileName;
var histogram = req.query.histogram === 'true';
var histogramLogarithm = req.query.histogramLogarithm === 'true';
if (req.query.region != null) {
var regions = req.query.region.split(',');
samtoolsWrap.getReadsFromRegions(fileName, regions, histogram, histogramLogarithm, function (err, result) {
if (err) {
res.status(500).send(err);
} else {
res.send(result);
}
});
} else {
res.status(500).send();
}
});
app.get(config.urlPathPrefix + '/list', function (req, res) {
samtoolsWrap.getFiles(function (err, result) {
if (err) {
res.status(500).send(err);
} else {
res.send(result);
}
});
});
app.get(config.urlPathPrefix + '/test', function (req, res) {
res.send("I am alive!");
});
app.listen(config.port);
console.log('Worker %d running!', cluster.worker.id);
}