Check if a MIME Part is an Image

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Demonstrates the Chilkat Mime.IsImage method, which returns whether the Content-Type begins with image/. It takes no arguments and applies to the current part.

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: This locates image parts — inline graphics in a multipart/related message, or image attachments — so your code can preview thumbnails, extract them, or handle them differently from documents. It matches any image/ subtype, including image/svg+xml.

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#include <C_CkMime.h>

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

    success = FALSE;

    //  Demonstrates the Mime.IsImage method, which returns whether the Content-Type begins with image/.  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 = CkMime_Create();
    success = CkMime_LoadMimeFile(mime,"qa_data/multipart_message.eml");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        return;
    }

    n = CkMime_getNumParts(mime);
    part = CkMime_Create();

    for (i = 0; i <= n - 1; i++) {
        success = CkMime_PartAt(mime,i,part);
        if (success == FALSE) {
            printf("%s\n",CkMime_lastErrorText(mime));
            CkMime_Dispose(mime);
            CkMime_Dispose(part);
            return;
        }

        if (CkMime_IsImage(part)) {
            printf("Part %d (%s) is an image.\n",i,CkMime_contentType(part));
        }

    }



    CkMime_Dispose(mime);
    CkMime_Dispose(part);

    }