(Unicode C) Convert MIME to XML

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

Chilkat C/C++ Library Downloads

MS Visual C/C++

Linux/CentOS C/C++

Alpine Linux C/C++

MAC OS X C/C++

armhf/aarch64 C/C++

C++ Builder

iOS C/C++

Android C/C++

Solaris C/C++

MinGW C/C++

#include <C_CkMimeW.h>
#include <C_CkXmlW.h>
#include <C_CkByteData.h>

void ChilkatSample(void)
    {
    HCkMimeW mime;
    BOOL success;
    const wchar_t *xmlStr;
    HCkXmlW xml;
    const wchar_t *htmlContent;
    const wchar_t *notUsed;
    HCkByteData jpgBytes;

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

    mime = CkMimeW_Create();

    // The contents of this MIME file are shown below, 
    // and is also available at https://www.chilkatsoft.com/sampleMime.txt
    success = CkMimeW_LoadMimeFile(mime,L"qa_data/mime/sampleMime.txt");
    if (success != TRUE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        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.
    xmlStr = CkMimeW_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 = CkXmlW_Create();
    CkXmlW_LoadXml(xml,xmlStr);
    // The XML emitted by this statement is shown below, following the remainder of sample code.
    wprintf(L"%s\n",CkXmlW_getXml(xml));

    // To get the top-level Subject header field:
    wprintf(L"Subject = %s\n",CkXmlW_chilkatPath(xml,L"header|subject|*"));

    // Another way of getting the Subject:
    CkXmlW_FirstChild2(xml);
    wprintf(L"Subject = %s\n",CkXmlW_getChildContent(xml,L"subject"));
    CkXmlW_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 = CkXmlW_SearchForContent2(xml,xml,L"content-type",L"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:
        htmlContent = CkXmlW_chilkatPath(xml,L"..|..|body|*");
        wprintf(L"%s\n",htmlContent);
        wprintf(L"-\n");
    }

    // Back to the root...
    CkXmlW_GetRoot2(xml);

    // How to iterate over all image/jpeg bodies and access the bytes of each?
    success = CkXmlW_SearchForContent2(xml,xml,L"content-type",L"image/jpeg");
    while (success == TRUE) {
        // "$" in the Chilkat path indicates to update the internal reference of the caller
        // if the path could be traversed.
        notUsed = CkXmlW_chilkatPath(xml,L"..|..|body|$");
        if (CkXmlW_getLastMethodSuccess(xml) == TRUE) {
            jpgBytes = CkByteData_Create();
            success = CkXmlW_GetBinaryContent(xml,FALSE,FALSE,L"",jpgBytes);

            wprintf(L"Found JPG image!\n");

            // Find the next JPG image.
            success = CkXmlW_SearchForContent2(xml,xml,L"content-type",L"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--
    // 


    CkMimeW_Dispose(mime);
    CkXmlW_Dispose(xml);
    CkByteData_Dispose(jpgBytes);

    }