Visual FoxPro

Access a Part in a Multipart MIME Entity

Demonstrates the Chilkat Mime.PartAt method, which provides live access to the direct child at a zero-based index. The first argument is the index and the second is a Mime object that will reference the child. Modifying it modifies the child stored in the parent tree.

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

Background: This is how you reach into a multipart message to inspect or edit an individual part — read a part's Content-Type, extract an attachment's body, or change a part in place. The key point is that the returned Mime is a live reference, not a copy, so edits to it flow back into the parent tree. Loop from 0 to NumParts - 1 to visit every direct child.

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LOCAL lnSuccess
LOCAL loMime
LOCAL n
LOCAL loPart
LOCAL i

lnSuccess = 0

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

*  PartAt provides LIVE access to a direct child part.  The 1st argument is the zero-based index
*  and the 2nd is a Mime object that will reference the child.  Modifying it modifies the child in
*  the parent tree.
n = loMime.NumParts
? "Number of parts: " + STR(n)

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

    ? "Part " + STR(i) + " Content-Type: " + loPart.ContentType
NEXT

RELEASE loMime
RELEASE loPart