Pascal (Lazarus/Delphi)
Get the Value of a MIME Header Field

Demonstrates how to get the value of a MIME header field. If the header field is not in the top-level MIME header, we must first navigate to the correct MIME part.
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Pascal (Lazarus/Delphi)
program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Mime;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  mime: TMime;
  mpRelated: TMime;
  pJpg: TMime;

begin
  success := False;

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

  mime := TMime.Create;

  //  The contents of this MIME file are shown below, 
  //  and is also available at https://www.chilkatsoft.com/sampleMime.txt
  success := mime.LoadMimeFile('qa_data/mime/sampleMime.txt');
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  //  The MIME used in this example has the following nested structure
  //  
  //  multipart/alternative
  //      text/plain
  //      multipart/related
  //          text/html
  //          image/jpeg
  //  

  //  Getting the content of a top-level MIME header is easy.
  //  MIME header fields are case insensitive.
  WriteLn('Subject = ' + mime.GetHeaderField('subject'));
  WriteLn('MIME-Version = ' + mime.GetHeaderField('mime-version'));

  //  To get a MIME header in a sub-part, first navigate to it..

  mpRelated := TMime.Create;
  success := mime.PartAt(1,mpRelated);
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  pJpg := TMime.Create;
  success := mpRelated.PartAt(1,pJpg);
  if (success = False) then
    begin
      WriteLn(mpRelated.LastErrorText);
      Exit;
    end;

  WriteLn('JPG Content-ID = ' + pJpg.GetHeaderField('content-id'));
  WriteLn('JPG Content-Type = ' + pJpg.GetHeaderField('content-type'));

  //  --------------------------------------------------------------
  //  --------------------------------------------------------------
  //  The MIME sample file loaded at the beginning of this example
  //  contains the following MIME:

  //  Subject: Test email.
  //  Content-Type: multipart/alternative;
  //  	boundary="------------DB171738719FB06D67DEBAA0"
  //  MIME-Version: 1.0
  //  
  //  --------------DB171738719FB06D67DEBAA0
  //  Content-Type: text/plain; charset="utf-8"; format=flowed
  //  Content-Transfer-Encoding: 7bit
  //  
  //  This is a test.
  //  
  //  --------------DB171738719FB06D67DEBAA0
  //  Content-Type: multipart/related;
  //  	boundary="------------A940F1230E6F0105F03DB2CB"
  //  
  //  --------------A940F1230E6F0105F03DB2CB
  //  Content-Type: text/html; charset="utf-8"
  //  Content-Transfer-Encoding: 8bit
  //  
  //  <html><head>
  //  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  //    </head>
  //    <body bgcolor="#FFFFFF" text="#000000">
  //      <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
  //    </body>
  //  </html>
  //  
  //  --------------A940F1230E6F0105F03DB2CB
  //  Content-Type: image/jpeg; name="starfish20.jpg"
  //  Content-Transfer-Encoding: base64
  //  Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
  //  Content-Disposition: inline; filename="starfish20.jpg"
  //  
  //  /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
  //  NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
  //  YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
  //  Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
  //  AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
  //  NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
  //  pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
  //  Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
  //  enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
  //  xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
  //  DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
  //  AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
  //  QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
  //  EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
  //  
  //  --------------A940F1230E6F0105F03DB2CB--
  //  
  //  --------------DB171738719FB06D67DEBAA0--
  //  


  mime.Free;
  mpRelated.Free;
  pJpg.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.