Delphi ActiveX

Send UTF-16 on TCP or TLS Socket

See more Socket/SSL/TLS Examples

Demonstrates how to send a string on a connected TCP or SSL/TLS socket such that it is the utf-16 byte representation that is sent. Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
socket: TChilkatSocket;
tls: Integer;
maxWaitMs: Integer;
domainOrIpAddr: WideString;
port: Integer;
sbXml: TChilkatStringBuilder;

begin
success := 0;

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

socket := TChilkatSocket.Create(Self);

tls := 0;
maxWaitMs := 20000;
domainOrIpAddr := 'example.com';
port := 1234;

// Connect to the whatever is expecting our connection...
success := socket.Connect(domainOrIpAddr,port,tls,maxWaitMs);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// Let's say we have an XML file saved in the utf-16 byte representation,
// and we want to send it over the connection using the utf-16 byte representation...

// First the file into a Chilkat StringBuilder.
// Tell the LoadFile method that we are reading utf-16 bytes..
sbXml := TChilkatStringBuilder.Create(Self);
success := sbXml.LoadFile('qa_data/xml/myUtf16.xml','utf-16');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load utf-16 XML file..');
    Exit;
  end;

// Tell the socket object that we wish to send the utf-16 byte representation of the string.
socket.StringCharset := 'utf-16';

// Send the string as utf-16 bytes.
success := socket.SendSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// Let's say we wanted to instead send the string as utf-8 bytes.
// Just tell the socket object...
socket.StringCharset := 'utf-8';

// Send the string as utf-8 bytes.
success := socket.SendSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// If our XML file was utf-8, then just tell the StringBuilder that we're reading utf-8.
// Once the text is properly contained in the StringBuilder, we can send the contents in any other charset (windows-1252, utf-16, utf-8, etc.) 
// as long as it make sense (i.e. we obviously can't send Japanese text using a single-byte charset such as Windows-1252).
success := sbXml.LoadFile('qa_data/xml/myUtf8.xml','utf-8');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load utf-8 XML file..');
    Exit;
  end;

// Send as utf-16
socket.StringCharset := 'utf-16';

// Send the string as utf-16 bytes.
success := socket.SendSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// ...
// ...
end;