I need to write a couple of program Telnet Client and Telnet Server.
I have created both a Delphi Telnet Client and Telnet server using Indy
components. I know how to read in data sent to the Client by using the
OnDataAvailable event and send data to the server by using the SendCh
method but how do you send and receive data at the Telnet Server. There
is no method like the OnDataAvailable event?
The telnet server is more structured than that. Remember that Indy uses *a lot* of inheritance in its design. TIdTelnetServer doesn't introduce much at all, but it inherits all sorts of methods and properties from TIdTCPServer. In particular, it has a CommandHandlers property, which you can use to define the commands you want to accept and the event handlers you want to run when you receive those commands. You can use the server's OnAfterCommandHandler and OnBeforeCommandHandler events to to general preparation and cleanup for commands. And you can use the OnNoCommandHandler event to take care of anything that the CommandHandlers collection doesn't recognize.
I suggest you test your server using an established telnet client, not the one you wrote yourself. That way, you can isolate errors in your server instead of working around them in your client.
-- Rob
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