added node example that shows how to log start and end of calls

examples/nodejs/plain/log_calls.js

@@ -0,0 +1,46 @@
+// example that show how to get sipgate.io to also push the end of the call
+
+var http = require('http');
+var queryString = require('querystring');
+
+// requires xmlbuilder: npm install xmlbuilder
+var builder = require('xmlbuilder');
+
+http.createServer(function (req, res) {
+	if (req.method == 'POST') {
+		var data = '';
+
+		req.on('data', function(currentData) {
+			data += currentData;
+		});
+
+		req.on('end', function () {
+			var post = queryString.parse(data);
+
+			if (post['event'] == 'newCall') {
+				console.log('New call with id ' + post['callId'] + ' started.');
+
+				var response = builder.create('Response',{version: '1.0', encoding: 'UTF-8'},{});
+				response.att('onHangup', 'http://' + req.headers.host + '/');
+
+				var body = response.toString();
+
+				res.writeHead(200, {
+					'Content-Length': body.length,
+					'Content-Type': 'application/xml'
+				});
+
+				res.write(body);
+				res.end();
+			}
+			else if (post['event'] == 'hangup' ) {
+				console.log('Call with id ' + post['callId'] + ' ended.');
+
+				res.writeHead(200);
+				res.end();
+			}
+		});
+	}
+
+}).listen(3000);
+