Delphi ActiveX

Fetch an IMAP Message's MIME into a BinData

Demonstrates the Chilkat Imap.FetchSingleBd method, which downloads one message's MIME bytes into a BinData object. If the second argument (bUid) is true, the first argument is a UID; otherwise it is a sequence number. This example downloads message 1's MIME into a BinData and prints the byte count.

Background: This is the binary counterpart to FetchSingleAsMime (which returns a string). A BinData holds raw bytes, so it preserves the message exactly — the right choice when you plan to write the MIME straight to a file, hash it, or hand it to an API expecting a byte buffer, with no charset conversion that could alter binary content.

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var
success: Integer;
imap: TChilkatImap;
bdMime: TChilkatBinData;

begin
success := 0;

//  Demonstrates the Imap.FetchSingleBd method, which downloads one message's MIME bytes into a
//  BinData object.  If the 2nd argument (bUid) is 1, the 1st argument is a UID; otherwise
//  it is a sequence number.

imap := TChilkatImap.Create(Self);

imap.Ssl := 1;
imap.Port := 993;

success := imap.Connect('imap.example.com');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;
success := imap.Login('user@example.com','myPassword');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

success := imap.SelectMailbox('Inbox');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

//  Download message sequence number 1's MIME bytes into a BinData.  bUid = 0.
bdMime := TChilkatBinData.Create(Self);
success := imap.FetchSingleBd(1,0,bdMime.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('MIME size (bytes) = ' + IntToStr(bdMime.NumBytes));

success := imap.Disconnect();
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;