Unicode C++

Parse MIME Header Fields

See more MIME Examples

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";
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--------------080707010302060306060800--

Unicode C++

#include <CkMimeW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkMimeW mime;

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

    success = mime.LoadMimeFile(L"sampleMime2.txt");
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        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.
    CkMimeW part2;
    success = mime.PartAt(1,part2);
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    // -------------------------------
    // 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.
    const wchar_t *filename = part2.getHeaderFieldAttribute(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",part2.filename());

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

    // To get the full value of the Content-Disposition header field,
    // call GetHeaderField.
    wprintf(L"Content-Disposition: %s\n",part2.getHeaderField(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
    const wchar_t *name = part2.getHeaderFieldAttribute(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",part2.name());

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

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

    wprintf(L"Finished.\n");
    }