private void ProcessRequest(Socket socket)
{
var buffer = new byte[1024];
var bytesCount = socket.Receive(buffer);
var headersText = Encoding.ASCII.GetString(buffer, 0, bytesCount);
try {
var parsedHeaders = ParsedHttpHeaders.Parse(headersText);
if (!parsedHeaders.IsNTRIP)
{
var response = "HTTP/1.0 200 OK\r\nServer: NTRIPCaster\r\nContent-Type: text/plain\r\n\r\nThis is a NTRIP Caster";
SendToSocket(socket, response);
socket.Close();
}
else if (parsedHeaders.Mountpoint == "")
{
// Send Sourcetable
SendSourcetable(socket);
socket.Close();
}
else if (parsedHeaders.IsSource)
{
ProcessSource(socket, parsedHeaders);
}
else
{
ProcessClient(socket, parsedHeaders);
}
} catch (Exception) {
// TODO: error handling
socket.Close();
}
}
private void ProcessClient(Socket socket, ParsedHttpHeaders parsedHeaders)
{
// Check Mountpoint
var source = Config.Sources.FirstOrDefault(x => x.Mountpoint == parsedHeaders.Mountpoint);
if (source == null)
{
SendSourcetable(socket);
socket.Close();
return;
}
// Check Login
var user = Config.Users.FirstOrDefault(x => x.Name.Equals(parsedHeaders.Username, StringComparison.OrdinalIgnoreCase));
if (!source.AuthRequired ||
(user != null && user.Password.Equals(parsedHeaders.Password, StringComparison.OrdinalIgnoreCase) && user.Mountpoints.Contains(parsedHeaders.Mountpoint)))
{
socket.Send(Encoding.ASCII.GetBytes("ICY 200 OK\r\n"));
socket.SendTimeout = 1000;
var client = new ClientConnection(socket, parsedHeaders.Mountpoint, parsedHeaders.Username);
client.StrartProcessing();
AddClient(client);
}
else
{
SendToSocket(socket, "ERROR - Bad Password");
socket.Close();
}
}
private void ProcessSource(Socket socket, ParsedHttpHeaders parsedHeaders)
{
// Check Mountpoint
var source = Config.Sources.FirstOrDefault(x => x.Mountpoint == parsedHeaders.Mountpoint);
if (source == null)
{
SendSourcetable(socket);
socket.Close();
return;
}
//// Check if there is another Server
//if (Servers[parsedHeaders.Mountpoint] != null) {
// SendToSocket(socket, "ERROR - Mountpoint already in use"); // Check behavior
// socket.Close();
// return;
//}
// Check Login
if (!source.Password.Equals(parsedHeaders.Password, StringComparison.OrdinalIgnoreCase))
{
SendToSocket(socket, "ERROR - Bad Password");
socket.Close();
return;
}
// Read Data
socket.Send(Encoding.ASCII.GetBytes("ICY 200 OK\r\n"));
Console.WriteLine($"New Server: {socket.RemoteEndPoint}");
var server = new ServerConnection(socket, parsedHeaders.Mountpoint, this);
server.StartProcessing();
}
public static ParsedHttpHeaders Parse(string headers)
{
var parsedHeaders = new ParsedHttpHeaders();
foreach (var header in headers.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries))
{
if (header.StartsWith("GET ", StringComparison.Ordinal))
{
// HTTP GET
parsedHeaders.Mountpoint = NormalizeMountpoint(header.Split(new char[] { ' ' })[1]);
}
else if (header.StartsWith("Authorization:", StringComparison.Ordinal))
{
// Basic Auth
var authorizationParts = header.Split(new char[] { ' ' });
if (authorizationParts.Length == 2 && authorizationParts[0].Equals("Basic", StringComparison.OrdinalIgnoreCase))
{
var usernamePassword = DecodeBase64(authorizationParts[1]).Split(new char[] { ':' });
if (usernamePassword.Length == 2)
{
parsedHeaders.Username = usernamePassword[0];
parsedHeaders.Password = usernamePassword[1];
}
}
}
else if (header.StartsWith("SOURCE", StringComparison.Ordinal))
{
// Source
parsedHeaders.IsSource = true;
var sourceParts = header.Split(new char[] { ' ' });
if (sourceParts.Length == 3)
{
parsedHeaders.Password = sourceParts[1];
parsedHeaders.Mountpoint = NormalizeMountpoint(sourceParts[2]);
}
}
else if (header.StartsWith("User-Agent:", StringComparison.Ordinal))
{
parsedHeaders.Agent = header.Substring("User-Agent:".Length).TrimStart();
}
else if (header.StartsWith("Source-Agent:", StringComparison.Ordinal))
{
parsedHeaders.Agent = header.Substring("Source-Agent:".Length).TrimStart();
}
else
{
Console.WriteLine("ignore header: " + header);
}
}
return(parsedHeaders);
}
