(Delphi ActiveX) URL Decode

Demonstrates how to URL decode a string.

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

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
sb: TChilkatStringBuilder;
success: Integer;

begin
sb := TChilkatStringBuilder.Create(Self);

// Here we wish to URL decode the following string:
success := sb.Append('%D7%9E%D7%95%D7%A6%D7%A81.jpg');

// Notice the above string contains Hebrew chars using the utf-8 byte representation.
// See https://www.loc.gov/marc/specifications/codetables/BasicHebrew.html
// For example:  D79E is the HEBREW LETTER MEM

// Therefore, when we decode to binary bytes, we must interpret the bytes as utf-8
// to get characters.

// Tell Chilkat to URL decode like this:
success := sb.Decode('url','utf-8');

// sb now contains the decoded string.
Memo1.Lines.Add(sb.GetAsString());
end;