TWSocket.OnSessionAvailable

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Main page -> ICS component reference -> TWSocket -> OnSessionAvailable

Definition

event OnSessionAvailable (Sender: TObject; ErrCode: Word);

Description

OnSessionAvailable is raised everytime a client wants to connect to the IP and Port a certain TCP-Server is listening on.

For UDP-connections this is not needed and should not be used.

Example

The following example implements the OnSessionAvailable of a simple TCP-Server which transfers the accepted connection to another socket so that other incomming connections can be accepted as well. Since the socket the connection is transfered to is a global variable here only one connection can be accepted, but this example is simply for showing the basics.

 var socket:TMySocket; // a descendant of TWSocket with overwritten OnDataAvailable
 
 procedure TMyServer.MyOnSessionAvailable(Sender: TObject; ErrCode: Word);
 var NewS:TSocket;
 begin
   if ErrCode <> 0 then exit;
 
   NewS:=Accept;
   socket:=TMySocket.create(nil);
   socket.dup(NewS);
 end;

Best practices

How to