private void ListenWorker_DoWork(object sender, DoWorkEventArgs e)
{
// setup http listener.
if (!HttpListener.IsSupported)
{
e.Result = "HttpListener is not supported on your OS.";
return;
}
HttpListener http = new HttpListener();
try
{
http.Prefixes.Add($"http://localhost:{SERVER_PORT}/");
http.Start();
}
catch (Exception exc)
{
e.Result = exc.Message;
return;
}
// make a pseudo random generator.
Random rnd = new Random();
rnd.Next();
BackgroundWorker self = sender as BackgroundWorker;
int counter = 1;
List <IPAddress> blocked = new List <IPAddress>();
List <string> allIPs = new List <string>();
List <int> gennedIDs = new List <int>();
while (true)
{
// obtain responses and stuff.
HttpListenerContext context = http.GetContext();
HttpListenerRequest request = context.Request;
HttpListenerResponse response = context.Response;
Stream output = response.OutputStream;
Stream input = request.InputStream;
response.ContentType = "application/x-www-form-urlencoded";
response.ContentEncoding = Encoding.UTF8;
response.StatusCode = (int)HttpStatusCode.OK;
// if blocked ip is trying again...
bool cont = false;
foreach (var endpoint in blocked)
{
if (endpoint.Equals(request.RemoteEndPoint.Address))
{
// update the RNG so it gets stronger.
rnd.Next();
Console.WriteLine("Blocked IP trying again huh... " + endpoint.ToString());
output.WriteString("status=success&reason=ok");
output.Close();
cont = true;
break;
}
}
if (cont)
{
continue;
}
switch (request.Url.AbsolutePath)
{
case "/register":
{
// get values.
var nvc = HttpUtility.ParseQueryString(input.ReadToEnd());
string employeename = nvc["username"];
string ipport = nvc["ipport"];
string iponly = ipport.Substring(0, ipport.IndexOf(':'));
bool stop = false;
foreach (string ip in allIPs)
{
if (iponly == ip)
{
// oh.
output.WriteString("status=denied&id=0");
output.Close();
stop = true;
Console.WriteLine("Access denied for " + ipport);
break;
}
}
if (stop)
{
continue;
}
Console.WriteLine("Adding " + iponly);
allIPs.Add(iponly);
// generate a totally unique random emp id.
int id = 0;
int bob = 100;
do
{
Console.WriteLine("Generating employee id...");
id = bob + rnd.Next(bob, int.MaxValue / bob);
}while (gennedIDs.IndexOf(id) != -1);
gennedIDs.Add(id);
// construct info struct
EmployeeInfo info = new EmployeeInfo(counter, id, employeename, ipport);
// return response
output.WriteString("status=success&id=" + id.ToString());
// send it to the ProgressChanged method.
self.ReportProgress(0, info);
counter++;
break;
}
case "/updatetime":
{
// update the RNG so it gets stronger.
rnd.Next();
// lol.
Console.WriteLine("Updating time...");
// parse client.
string query = input.ReadToEnd();
var nvc = HttpUtility.ParseQueryString(query);
if (nvc["time"] == "ABUSE") // abuse detection worked.
{
blocked.Add(request.RemoteEndPoint.Address);
Console.WriteLine("ABUSE DETECTED! " + request.RemoteEndPoint.ToString());
}
else
{
int _newtime = -1, _empid = -1;
if (!int.TryParse(nvc["time"], out _newtime))
{
output.WriteString("status=failure&reason=InvalidTime");
output.Close();
continue;
}
else if (!int.TryParse(nvc["employeeid"], out _empid))
{
output.WriteString("status=failure&reason=InvalidEmployeeId");
output.Close();
continue;
}
output.WriteString("status=success&reason=ok");
// construct update struct.
UpdateInfo uinfo = new UpdateInfo(_newtime, _empid);
// report to UI
self.ReportProgress(1, uinfo);
}
// we're done.
output.WriteString("status=success&reason=ok");
break;
}
case "/leaderboard":
{
Leaderboard lbret = (Leaderboard)MainListView.Invoke((Func <Leaderboard>) delegate
{
Leaderboard lb = new Leaderboard
{
employees = new Employee[MainListView.Items.Count]
};
int i = 0;
foreach (ListViewItem lvi in MainListView.Items)
{
if (lvi.SubItems[2].Text == "-1")
{
continue;
}
lb.employees[i] = new Employee
{
id = lvi.Text,
best_time = lvi.SubItems[2].Text
};
i++;
}
return(lb);
});
string lbstring = JsonConvert.SerializeObject(lbret);
byte[] lbrawstring = Encoding.UTF8.GetBytes(lbstring);
response.ContentType = "application/json";
response.ContentLength64 = lbrawstring.LongLength;
output.WriteString(lbstring);
break;
}
default:
{
Console.WriteLine("Unsupported method, ignoring...");
break;
}
}
output.Close();
}
}
