Delphi DLL Requires Chilkat v11.0.0+

Accept Connection on Socket

See more Socket/SSL/TLS Examples

Demonstrates how to create a TCP/IP socket, listen on a port, accept an incoming connection, and send a "Hello World" message to the client. Delphi DLL

var
success: Boolean;
listenSocket: HCkSocket;
connectedSocket: HCkSocket;

begin
success := False;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

listenSocket := CkSocket_Create();

//  Bind to a port and listen for incoming connections:
//  This example will listen at port 5555 and allows for a backlog
//  of 25 pending connection requests.
success := CkSocket_BindAndListen(listenSocket,5555,25);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(listenSocket));
    Exit;
  end;

//  Get the next incoming connection
//  Wait a maximum of 20 seconds (20000 millisec)
connectedSocket := CkSocket_Create();
success := CkSocket_AcceptNext(listenSocket,20000,connectedSocket);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(listenSocket));
    Exit;
  end;

//  Set maximum timeouts for reading an writing (in millisec)
CkSocket_putMaxReadIdleMs(connectedSocket,10000);
CkSocket_putMaxSendIdleMs(connectedSocket,10000);

//  Send a "Hello World!" message to the client:
success := CkSocket_SendString(connectedSocket,'Hello World!');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(connectedSocket));
    Exit;
  end;

//  Close the connection with the client.
//  Wait a max of 20 seconds (20000 millsec)
success := CkSocket_Close(connectedSocket,20000);

Memo1.Lines.Add('success!');

CkSocket_Dispose(listenSocket);
CkSocket_Dispose(connectedSocket);