Pascal (Lazarus/Delphi)

Save All MIME Attachments to Files

Demonstrates the Chilkat Mime.PartsToFiles method, which recursively traverses the MIME tree and saves each part having a nonempty filename parameter to a directory. The first argument is the destination directory and the second is a StringTable that receives the saved filenames.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This extracts every named attachment from a message in one call, walking the whole tree so it finds attachments nested inside multipart containers. It saves only parts that declare a filename — inline body parts without one are skipped — and reports what it wrote via the StringTable, which is handy for logging or follow-up processing. The destination directory must already exist.

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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,
  Chilkat.StringTable;

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

procedure RunDemo;
var
  success: Boolean;
  mime: TMime;
  savedFiles: TStringTable;
  n: Integer;
  i: Integer;
  name: string;

begin
  success := False;

  mime := TMime.Create;
  success := mime.LoadMimeFile('qa_data/multipart_message.eml');
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  //  Recursively traverse the MIME tree and save each part that has a nonempty "filename" parameter
  //  to a directory.  The 1st argument is the destination directory and the 2nd is a StringTable
  //  that receives the saved filenames.
  savedFiles := TStringTable.Create;
  success := mime.PartsToFiles('qa_output/attachments',savedFiles);
  if (success = False) then
    begin
      WriteLn(mime.LastErrorText);
      Exit;
    end;

  n := savedFiles.Count;
  WriteLn('Saved ' + n + ' files:');

  for i := 0 to n - 1 do
    begin
      name := savedFiles.StringAt(i);
      if (savedFiles.LastMethodSuccess = False) then
        begin
          WriteLn(savedFiles.LastErrorText);
          Exit;
        end;
      WriteLn(name);
    end;



  mime.Free;
  savedFiles.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.