Handle properly SINGINT and SIGTERM signals

Author: Nicolas Huray

cli.js

@@ -27,3 +27,16 @@ var server = require('./index.js')(argv).listen(argv.port || 4567, function() {
   var address = server.address(), protocol = argv.ssl ? 'https' : 'http'
   console.log('Listening at %s://%s:%s', protocol, address.address, address.port)
 })
+
+// Handle signals properly
+// see: https://github.com/nodejs/node-v0.x-archive/issues/9131
+exitOnSignal('SIGINT');
+exitOnSignal('SIGTERM');
+
+function exitOnSignal(signal) {
+  process.on(signal, function() {
+    console.log('\ncaught ' + signal + ', exiting');
+    // perform all required cleanup
+    process.exit(1);
+  });
+}