Delphi ActiveX

URL-Encode a MIME Body

Demonstrates the Chilkat Mime.UrlEncodeBody method, which replaces the current body with an application/x-www-form-urlencoded-style representation using the named charset. The only argument is the charset; it is a void method.

Background: This transforms the body into the form-encoding used by HTML form submissions — spaces to +, reserved characters to percent-escapes — interpreting the text through the given charset first so non-ASCII characters encode correctly. It is a niche operation for constructing form-style payloads within a MIME part.

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

begin
success := 0;

//  Demonstrates the Mime.UrlEncodeBody method, which replaces the current body with an
//  application/x-www-form-urlencoded representation using the named charset.  The only argument is
//  the charset.  It is a void method.

mime := TChilkatMime.Create(Self);

success := mime.SetBodyFromPlainText('name=John Doe & city=New York');
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

//  URL-encode the body: spaces become "+", reserved characters become %-escapes.
mime.UrlEncodeBody('utf-8');

encodedBody := mime.GetBodyDecoded();
if (mime.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(encodedBody);