Pretty simple file server on Node.js

fileserver.js

var fs = require("fs");
var net = require("net");

var basePath = "/Users/marek/test";
var server = net.createServer(function(client) {
    var buffer = "";
    var stream = null;
    var size = 0;
    var streamed = 0;
    client.addListener("data", function(data) {
        if (stream != null) {
            stream.write(data);
            streamed += data.length;
            if (size <= streamed) {
                stream.destroySoon();
                client.destroySoon();
            }
            return;
        }
        buffer += data.toString("ascii");
        var pos = buffer.indexOf("\n");
        if (pos > -1) {
            var header = buffer.substr(0, pos - 1).split(":");
            buffer = buffer.substr(pos + 1);
            if (header[0] == "GET") {
                path = basePath + header[1]
                fs.stat(path, function(err, stat) {
                    size = stat.size;
                    if(header[2] == null) header[2] = 0;
                    if(header[3] == null) header[3] = size;
                    var stream = fs.createReadStream(path, {start: header[2], end: header[3]});
                    stream.addListener("data", function(data) {
                        client.write(data);
                        streamed += data.length;
                        if(streamed == size){
                            client.destroySoon();
                        }
                    });
                });
            } else if (header[0] == "PUT") {
                size = parseInt(header[2]);
                stream = fs.createWriteStream(basePath + header[1]);
                stream.write(buffer);
                streamed += buffer.length;
                buffer = null;
            }
        }
    });
});

server.listen(8124, "0.0.0.0");