Delphi DLL

Send BinData Contents over a Socket

Demonstrates Socket.SendBd, which sends bytes from a BinData beginning at an offset. A numBytes of 0 sends from the offset through the end of the data.

Background. The BinData receive methods accumulate raw bytes in a BinData object. A single receive returns only what is currently available, whereas the counted receive waits for an exact number of bytes.

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Delphi DLL

var
success: Boolean;
socket: HCkSocket;
bTls: Boolean;
maxWaitMs: Integer;
bd: HCkBinData;

begin
success := False;

socket := CkSocket_Create();

//  Connect to the server using TLS.
bTls := True;
maxWaitMs := 5000;
success := CkSocket_Connect(socket,'example.com',5000,bTls,maxWaitMs);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

//  Place some bytes into a BinData to be sent.
bd := CkBinData_Create();
CkBinData_AppendString(bd,'message payload','utf-8');

//  Send bytes from the BinData starting at the given offset.  A numBytes of 0 sends from the offset
//  through the end of the data.
success := CkSocket_SendBd(socket,bd,0,0);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;
Memo1.Lines.Add('Sent ' + IntToStr(CkBinData_getNumBytes(bd)) + ' bytes.');

CkSocket_Dispose(socket);
CkBinData_Dispose(bd);