Unicode C

Check if a MIME Part is an Attachment

Demonstrates the Chilkat Mime.IsAttachment method, which returns whether the current part's Content-Disposition is attachment (matched case-insensitively). It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Whether a part is an attachment is about disposition, not content type — an image can be inline (Content-Disposition: inline) or an attachment. This predicate keys off that header, which is the right basis for deciding what to list as a downloadable attachment versus what to render within the message body.

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Unicode C

#include <C_CkMimeW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMimeW mime;
    int n;
    HCkMimeW part;
    int i;

    success = FALSE;

    //  Demonstrates the Mime.IsAttachment method, which returns whether the part's Content-Disposition is attachment.  It takes no arguments and applies to the current
    //  part.  This example iterates the parts of a multipart message and reports which ones match.

    mime = CkMimeW_Create();
    success = CkMimeW_LoadMimeFile(mime,L"qa_data/multipart_message.eml");
    if (success == FALSE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        return;
    }

    n = CkMimeW_getNumParts(mime);
    part = CkMimeW_Create();

    for (i = 0; i <= n - 1; i++) {
        success = CkMimeW_PartAt(mime,i,part);
        if (success == FALSE) {
            wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
            CkMimeW_Dispose(mime);
            CkMimeW_Dispose(part);
            return;
        }

        if (CkMimeW_IsAttachment(part)) {
            wprintf(L"Part %d (%s) is an attachment.\n",i,CkMimeW_contentType(part));
        }

    }



    CkMimeW_Dispose(mime);
    CkMimeW_Dispose(part);

    }