(Unicode C) Parse MIME Header Fields

Demonstrates how to parse MIME header fields, including Content-Type, Content-Disposition, and Content-Transfer-Encoding.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
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RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080707010302060306060800--

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#include <C_CkMimeW.h>

void ChilkatSample(void)
    {
    HCkMimeW mime;
    BOOL success;
    HCkMimeW part2;
    const wchar_t *filename;
    const wchar_t *name;

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

    mime = CkMimeW_Create();

    // Load the sampleMime2.txt file into the MIME object.
    // (This file is available at http://www.chilkatsoft.com/testData/sampleMime2.txt )

    success = CkMimeW_LoadMimeFile(mime,L"sampleMime2.txt");
    if (success == FALSE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        return;
    }

    // The GIF image is the 2nd sub-part located directly under the
    // top-level MIME node.  Indexing begins at 0, therefore the 2nd
    // sub-part is at index 1.

    part2 = CkMimeW_GetPart(mime,1);

    // -------------------------------
    // Content-Disposition
    // -------------------------------
    // In this example, the Content-Disposition header field
    // contains this value:
    // attachment; filename="starfish.gif"

    // To get the "filename", call GetHeaderFieldAttribute
    // Header field names and attribute names are case insensitive.
    filename = CkMimeW_getHeaderFieldAttribute(part2,L"Content-Disposition",L"filename");
    wprintf(L"Filename: %s\n",filename);

    // Because the "filename" is so often accessed, it is also available
    // by accessing the "Filename" property:
    wprintf(L"Filename: %s\n",CkMimeW_filename(part2));

    // The disposition (without attributes) which in this case 
    // is the string "attachment" is accessed via the Disposition property:
    wprintf(L"Disposition: %s\n",CkMimeW_disposition(part2));

    // To get the full value of the Content-Disposition header field,
    // call GetHeaderField.
    wprintf(L"Content-Disposition: %s\n",CkMimeW_getHeaderField(part2,L"Content-Disposition"));

    // -------------------------------
    // Content-Type
    // -------------------------------
    // In this example, the Content-Type header field
    // contains this value:
    // image/gif; name="starfish.gif"

    // To get the "name", call GetHeaderFieldAttribute
    name = CkMimeW_getHeaderFieldAttribute(part2,L"Content-Type",L"name");
    wprintf(L"Content-Type name: %s\n",name);

    // Because the "name" is so often accessed, it is also available
    // by accessing the "Name" property:
    wprintf(L"Content-Type name: %s\n",CkMimeW_name(part2));

    // The content-type without attributes is available in the
    // ContentType property:
    wprintf(L"Content-Type: %s\n",CkMimeW_contentType(part2));

    // To get the full value of the Content-Type header field,
    // call GetHeaderField.
    wprintf(L"Content-Type: %s\n",CkMimeW_getHeaderField(part2,L"Content-Type"));

    // -------------------------------
    // Content-Transfer-Encoding
    // -------------------------------

    // The Encoding property contains the value of the
    // Content-Transfer-Encoding property. 
    // Calling GetHeaderField("Content-Transfer-Encoding") is
    // equivalent to accessing the Encoding property:
    wprintf(L"Content-Transfer-Encoding: %s\n",CkMimeW_encoding(part2));
    wprintf(L"Content-Transfer-Encoding: %s\n",CkMimeW_getHeaderField(part2,L"Content-Transfer-Encoding"));

    CkMimeW_Dispose(part2);

    wprintf(L"Finished.\n");


    CkMimeW_Dispose(mime);

    }