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(Delphi DLL) Convert MIME to XML

Demonstrates how to convert MIME to XML, and how to access the MIME parts and data from XML.

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Mime, Xml, CkByteData;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mime: HCkMime;
success: Boolean;
xmlStr: PWideChar;
xml: HCkXml;
htmlContent: PWideChar;
notUsed: PWideChar;
jpgBytes: HCkByteData;

begin
//  This example assumes Chilkat Mime to have been previously unlocked.
//  See Unlock Mime for sample code.

mime := CkMime_Create();

//  The contents of this MIME file are shown below,
//  and is also available at https://www.chilkatsoft.com/sampleMime.txt
success := CkMime_LoadMimeFile(mime,'qa_data/mime/sampleMime.txt');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkMime__lastErrorText(mime));
    Exit;
  end;

//  The MIME used in this example has the following nested structure
// 
//  multipart/alternative
//      text/plain
//      multipart/related
//          text/html
//          image/jpeg
// 

//  Convert to XML.
xmlStr := CkMime__getXml(mime);

//  Load into a Chilkat XML object so we can emit in indented format.
//  (and also to demonstrate how to access the MIME content from XML).
xml := CkXml_Create();
CkXml_LoadXml(xml,xmlStr);
//  The XML emitted by this statement is shown below, following the remainder of sample code.
Memo1.Lines.Add(CkXml__getXml(xml));

//  To get the top-level Subject header field:
Memo1.Lines.Add('Subject = ' + CkXml__chilkatPath(xml,'header|subject|*'));

//  Another way of getting the Subject:
CkXml_FirstChild2(xml);
Memo1.Lines.Add('Subject = ' + CkXml__getChildContent(xml,'subject'));
CkXml_GetRoot2(xml);

//  Using the Chilkat XML API, there are many different ways of accomplishing a goal.
//  This example shows only a few possibilities...

//  Let's go to the <body> tag containing the HTML.
//  First we find the XML node where the content-type is text/html.
//  (XML methods ending in "2" update the internal reference to the XML node.)
success := CkXml_SearchForContent2(xml,xml,'content-type','text/html');
if (success = True) then
  begin
    //  From this point, we know the HTML content is two levels up (to the <mime_message> node),
    //  and one level down (to the <body> node).  We can get the HTML content from here:
    htmlContent := CkXml__chilkatPath(xml,'..|..|body|*');
    Memo1.Lines.Add(htmlContent);
    Memo1.Lines.Add('-');
  end;

//  Back to the root...
CkXml_GetRoot2(xml);

//  How to iterate over all image/jpeg bodies and access the bytes of each?
success := CkXml_SearchForContent2(xml,xml,'content-type','image/jpeg');
while success = True do
  begin
    //  "$" in the Chilkat path indicates to update the internal reference of the caller
    //  if the path could be traversed.
    notUsed := CkXml__chilkatPath(xml,'..|..|body|$');
    if (CkXml_getLastMethodSuccess(xml) = True) then
      begin
        jpgBytes := CkByteData_Create();
        success := CkXml_GetBinaryContent(xml,False,False,'',jpgBytes);

        Memo1.Lines.Add('Found JPG image!');

        //  Find the next JPG image.
        success := CkXml_SearchForContent2(xml,xml,'content-type','image/jpeg');
      end
    else
      begin
        success := False;
      end;
  end;

//  --------------------------------------------------------------
//  --------------------------------------------------------------
//  The MIME converted to XML:

//  <?xml version="1.0" encoding="utf-8" ?>
//  <mime_message>
//      <header>
//          <subject>Test email.</subject>
//          <content-type boundary="------------DB171738719FB06D67DEBAA0">multipart/alternative</content-type>
//          <mime-version>1.0</mime-version>
//      </header>
//      <body>
//          <subpart>
//              <mime_message>
//                  <header>
//                      <content-type charset="utf-8" format="flowed">text/plain</content-type>
//                      <content-transfer-encoding>7bit</content-transfer-encoding>
//                  </header>
//                  <body><![CDATA[This is a test.
//  ]]></body>
//              </mime_message>
//          </subpart>
//          <subpart>
//              <mime_message>
//                  <header>
//                      <content-type boundary="------------A940F1230E6F0105F03DB2CB">multipart/related</content-type>
//                  </header>
//                  <body>
//                      <subpart>
//                          <mime_message>
//                              <header>
//                                  <content-type charset="utf-8">text/html</content-type>
//                                  <content-transfer-encoding>8bit</content-transfer-encoding>
//                              </header>
//                              <body><![CDATA[<html><head>
//  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
//    </head>
//    <body bgcolor="#FFFFFF" text="#000000">
//      <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
//    </body>
//  </html>
//  ]]></body>
//                          </mime_message>
//                      </subpart>
//                      <subpart>
//                          <mime_message>
//                              <header>
//                                  <content-type name="starfish20.jpg">image/jpeg</content-type>
//                                  <content-transfer-encoding>base64</content-transfer-encoding>
//                                  <content-id>&lt;part1.E16AE3B4.1505C436@chilkatsoft.com&gt;</content-id>
//                                  <content-disposition filename="starfish20.jpg">inline</content-disposition>
//                              </header>
//                              <body>/9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
//  NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
//  YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
//  Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
//  AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
//  NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
//  pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
//  Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
//  enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
//  xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
//  DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
//  AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
//  QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
//  EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==</body>
//                          </mime_message>
//                      </subpart>
//                  </body>
//              </mime_message>
//          </subpart>
//      </body>
//  </mime_message>
// 

//  --------------------------------------------------------------
//  --------------------------------------------------------------
//  The MIME sample file loaded at the beginning of this example
//  contains the following MIME:

//  Subject: Test email.
//  Content-Type: multipart/alternative;
//  	boundary="------------DB171738719FB06D67DEBAA0"
//  MIME-Version: 1.0
// 
//  --------------DB171738719FB06D67DEBAA0
//  Content-Type: text/plain; charset="utf-8"; format=flowed
//  Content-Transfer-Encoding: 7bit
// 
//  This is a test.
// 
//  --------------DB171738719FB06D67DEBAA0
//  Content-Type: multipart/related;
//  	boundary="------------A940F1230E6F0105F03DB2CB"
// 
//  --------------A940F1230E6F0105F03DB2CB
//  Content-Type: text/html; charset="utf-8"
//  Content-Transfer-Encoding: 8bit
// 
//  <html><head>
//  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
//    </head>
//    <body bgcolor="#FFFFFF" text="#000000">
//      <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
//    </body>
//  </html>
// 
//  --------------A940F1230E6F0105F03DB2CB
//  Content-Type: image/jpeg; name="starfish20.jpg"
//  Content-Transfer-Encoding: base64
//  Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
//  Content-Disposition: inline; filename="starfish20.jpg"
// 
//  /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
//  NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
//  YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
//  Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
//  AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
//  NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
//  pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
//  Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
//  enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
//  xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
//  DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
//  AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
//  QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
//  EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
// 
//  --------------A940F1230E6F0105F03DB2CB--
// 
//  --------------DB171738719FB06D67DEBAA0--
// 

CkMime_Dispose(mime);
CkXml_Dispose(xml);
        CkByteData_Dispose(jpgBytes);

end;

 

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