(Delphi DLL) StringBuilder to Bytes (in BinData)

Demonstrates converting a string to bytes of a particular character encoding.

Note: This example requires Chilkat v9.5.0.64 or later.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, BinData, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
sbJson: HCkStringBuilder;
success: Boolean;
sbGreek: HCkStringBuilder;
json: HCkJsonObject;
greekAlphabet: PWideChar;
binWindows1253: HCkBinData;
binUtf8: HCkBinData;
binUtf16: HCkBinData;

begin
// This initial step gets string data to be used in this example from a live URL.
// It assumes Chilkat HTTP API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := CkHttp_Create();
CkHttp_putVerboseLogging(http,True);
sbJson := CkStringBuilder_Create();
success := CkHttp_QuickGetSb(http,'https://www.chilkatsoft.com/exampleData/greekAlphabet.json',sbJson);
if (not success) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbGreek := CkStringBuilder_Create();
json := CkJsonObject_Create();
CkJsonObject_LoadSb(json,sbJson);

// The JSON contains this:

// 	{ 
// 	  "greekAlphabet": "                                                "
// 	} 

greekAlphabet := CkJsonObject__stringOf(json,'greekAlphabet');
CkStringBuilder_Append(sbGreek,greekAlphabet);

// Append the Windows-1253 represention of the string..
// In this encoding, each Greek char is one byte per char.
binWindows1253 := CkBinData_Create();
CkBinData_AppendSb(binWindows1253,sbGreek,'windows-1253');
// Save to a Windows-1253 text file:
CkBinData_WriteFile(binWindows1253,'qa_output/greek_win1253.txt');

// Show the bytes in the quoted-printable format so we can easily see the Windows-1253 byte values.
Memo1.Lines.Add(CkBinData__getEncoded(binWindows1253,'qp'));
Memo1.Lines.Add('--------------------------------');

// The result is shown here:
// 	=C1 =E1 =C2 =E2 =C3 =E3 =C4 =E4 =C5 =E5 =C6 =E6 =C7 =E7 =C8 =E8 =C9 =E9 =CA=
// 	 =EA =CB =EB =CC =EC =CD =ED =CE =EE =CF =EF =D0 =F0 =D1 =F1 =D3 =F3 =F2 =
// 	=D4 =F4 =D5 =F5 =D6 =F6 =D7 =F7 =D8 =F8 =D9 =F9

// Append the utf-8 represention of the string..
binUtf8 := CkBinData_Create();
CkBinData_AppendBom(binUtf8,'utf-8');
CkBinData_AppendSb(binUtf8,sbGreek,'utf-8');
// Save to a utf-8 text file:
CkBinData_WriteFile(binUtf8,'qa_output/greek_utf8.txt');
// Show the bytes in the quoted-printable format so we can easily see the utf-8 char representations.
Memo1.Lines.Add(CkBinData__getEncoded(binUtf8,'qp'));

Memo1.Lines.Add('--------------------------------');

// These are the utf-8 bytes shown in quoted-printable encoding:
// 	=EF=BB=BF=CE=91 =CE=B1 =CE=92 =CE=B2 =CE=93 =CE=B3 =CE=94 =CE=B4 =CE=95 =CE=
// 	=B5 =CE=96 =CE=B6 =CE=97 =CE=B7 =CE=98 =CE=B8 =CE=99 =CE=B9 =CE=9A =CE=BA =
// 	=CE=9B =CE=BB =CE=9C =CE=BC =CE=9D =CE=BD =CE=9E =CE=BE =CE=9F =CE=BF =CE=
// 	=A0 =CF=80 =CE=A1 =CF=81 =CE=A3 =CF=83 =CF=82 =CE=A4 =CF=84 =CE=A5 =CF=85 =
// 	=CE=A6 =CF=86 =CE=A7 =CF=87 =CE=A8 =CF=88 =CE=A9 =CF=89

// Append the utf-16 (little endian) represention of the string..
binUtf16 := CkBinData_Create();
CkBinData_AppendBom(binUtf16,'utf-16');
CkBinData_AppendSb(binUtf16,sbGreek,'utf-16');
// Save to a utf-16 text file:
CkBinData_WriteFile(binUtf16,'qa_output/greek_utf16.txt');
Memo1.Lines.Add(CkBinData__getEncoded(binUtf16,'qp'));

// These are the utf-16 bytes shown in quoted-printable encoding:
// 	=FF=FE=91=03 =00=B1=03 =00=92=03 =00=B2=03 =00=93=03 =00=B3=03 =00=94=03 =
// 	=00=B4=03 =00=95=03 =00=B5=03 =00=96=03 =00=B6=03 =00=97=03 =00=B7=03 =00=
// 	=98=03 =00=B8=03 =00=99=03 =00=B9=03 =00=9A=03 =00=BA=03 =00=9B=03 =00=BB=
// 	=03 =00=9C=03 =00=BC=03 =00=9D=03 =00=BD=03 =00=9E=03 =00=BE=03 =00=9F=03 =
// 	=00=BF=03 =00=A0=03 =00=C0=03 =00=A1=03 =00=C1=03 =00=A3=03 =00=C3=03 =00=
// 	=C2=03 =00=A4=03 =00=C4=03 =00=A5=03 =00=C5=03 =00=A6=03 =00=C6=03 =00=A7=
// 	=03 =00=C7=03 =00=A8=03 =00=C8=03 =00=A9=03 =00=C9=03

CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbJson);
CkStringBuilder_Dispose(sbGreek);
CkJsonObject_Dispose(json);
CkBinData_Dispose(binWindows1253);
CkBinData_Dispose(binUtf8);
CkBinData_Dispose(binUtf16);

end;