test res.setEncoding('utf8')

req.js

var http = require('http');

function get() {
	http.get("http://localhost:9345", function (res) {
		var data = '';
		res.setEncoding('utf8');
		
		res.on('data', function (chunk) {
			console.log('get chunk: ' + chunk);
			data += chunk;
		});
		
		res.on('end', function () {
			console.log(data);
		});
	}).on('error', function (err) {
		console.log(err);
	});
}

var server = http.createServer(function (req, res) {
	var str = 'п1п1',
		buff = new Buffer(str, 'utf8'),
		l = buff.length;
	
	
	
	(function send(i) {
		var chunk;
		if (l > i) {
			chunk = buff.slice(i, i + 2);
			console.log('send chunk: ' + chunk.toString('utf8'));
			res.write(chunk);
			setTimeout(function () {
				i += 2;
				send(i);
			}, 300);
		} else {
			res.end();
			server.close();
		}
	}(0));
});

server.listen(9345, get);