Delphi DLL

Serialize MIME to BinData

Demonstrates the Chilkat Mime.GetMimeBd method, which serializes the complete MIME entity and appends its bytes to a BinData. The only argument is the BinData; existing bytes are preserved.

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 is the byte-exact serializer — the right choice when the MIME carries binary content such as an image or an 8-bit-encoded part, where routing the output through a text string could corrupt it. The result is a faithful byte stream you can write to a file, transmit, or hash. It pairs with LoadMimeBd for lossless round-tripping of binary MIME.

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var
success: Boolean;
mime: HCkMime;
bd: HCkBinData;

begin
success := False;

//  Demonstrates the Mime.GetMimeBd method, which serializes the complete MIME entity and appends
//  its bytes to a BinData.  The only argument is the BinData.  Use this when arbitrary binary body
//  bytes must not pass through a text string.

mime := CkMime_Create();

success := CkMime_SetBodyFromFile(mime,'qa_data/photo.jpg');
if (success = False) then
  begin
    Memo1.Lines.Add(CkMime__lastErrorText(mime));
    Exit;
  end;

//  Append the serialized MIME bytes to a BinData.  Existing bytes are preserved.
bd := CkBinData_Create();
success := CkMime_GetMimeBd(mime,bd);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMime__lastErrorText(mime));
    Exit;
  end;

Memo1.Lines.Add('Serialized ' + IntToStr(CkBinData_getNumBytes(bd)) + ' bytes.');

CkMime_Dispose(mime);
CkBinData_Dispose(bd);