Delphi ActiveX

Get a Summary of the MIME Structure

Demonstrates the Chilkat Mime.GetStructure method, which returns a concise summary of the MIME tree. The only argument selects the format: xml for XML, or text (the default for any other value) for a plain-text outline.

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: A real message can nest multipart containers several levels deep — a multipart/mixed holding a multipart/alternative of text and HTML plus attachments — and GetStructure renders that hierarchy at a glance without the full content. It is the fast way to understand or debug an unfamiliar message's layout, in either a readable text outline or machine-parseable XML.

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var
success: Integer;
mime: TChilkatMime;
structure: WideString;

begin
success := 0;

//  Demonstrates the Mime.GetStructure method, which returns a concise summary of the MIME tree.
//  The only argument selects the output format: "xml" for XML, or "text" (the default) for a
//  plain-text outline.

mime := TChilkatMime.Create(Self);

success := mime.LoadMimeFile('qa_data/multipart_message.eml');
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

//  Get a human-readable text outline of the MIME structure.
structure := mime.GetStructure('text');
if (mime.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(structure);