Visual FoxPro

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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LOCAL lnSuccess
LOCAL loMime
LOCAL n
LOCAL loPart
LOCAL i

lnSuccess = 0

*  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.

loMime = CreateObject('Chilkat.Mime')
lnSuccess = loMime.LoadMimeFile("qa_data/multipart_message.eml")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

n = loMime.NumParts
loPart = CreateObject('Chilkat.Mime')

FOR i = 0 TO n - 1
    lnSuccess = loMime.PartAt(i,loPart)
    IF (lnSuccess = 0) THEN
        ? loMime.LastErrorText
        RELEASE loMime
        RELEASE loPart
        CANCEL
    ENDIF

    IF (loPart.IsAttachment()) THEN
        ? "Part " + STR(i) + " (" + loPart.ContentType + ") is an attachment."
    ENDIF

NEXT

RELEASE loMime
RELEASE loPart