(C++) Convert MIME to XML

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

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#include <CkMime.h>
#include <CkXml.h>
#include <CkByteData.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkMime mime;

    // The contents of this MIME file are shown below, 
    // and is also available at https://www.chilkatsoft.com/sampleMime.txt
    bool success = mime.LoadMimeFile("qa_data/mime/sampleMime.txt");
    if (success != true) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

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

    // Convert to XML.
    const char *xmlStr = mime.getXml();

    // 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).
    CkXml xml;
    xml.LoadXml(xmlStr);
    // The XML emitted by this statement is shown below, following the remainder of sample code.
    std::cout << xml.getXml() << "\r\n";

    // To get the top-level Subject header field:
    std::cout << "Subject = " << xml.chilkatPath("header|subject|*") << "\r\n";

    // Another way of getting the Subject:
    xml.FirstChild2();
    std::cout << "Subject = " << xml.getChildContent("subject") << "\r\n";
    xml.GetRoot2();

    // 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 = xml.SearchForContent2(xml,"content-type","text/html");
    if (success == true) {
        // 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:
        const char *htmlContent = xml.chilkatPath("..|..|body|*");
        std::cout << htmlContent << "\r\n";
        std::cout << "-" << "\r\n";
    }

    // Back to the root...
    xml.GetRoot2();

    // How to iterate over all image/jpeg bodies and access the bytes of each?
    success = xml.SearchForContent2(xml,"content-type","image/jpeg");
    while (success == true) {
        // "$" in the Chilkat path indicates to update the internal reference of the caller
        // if the path could be traversed.
        const char *notUsed = xml.chilkatPath("..|..|body|$");
        if (xml.get_LastMethodSuccess() == true) {
            CkByteData jpgBytes;
            success = xml.GetBinaryContent(false,false,"",jpgBytes);

            std::cout << "Found JPG image!" << "\r\n";

            // Find the next JPG image.
            success = xml.SearchForContent2(xml,"content-type","image/jpeg");
        }
        else {
            success = false;
        }

    }

    // --------------------------------------------------------------
    // --------------------------------------------------------------
    // 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--
    // 
    }