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Check if a MIME Part is Application Data

Demonstrates the Chilkat Mime.IsApplicationData method, which returns whether the Content-Type begins with application/. 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: The application/ family covers everything that is not plain media or text — PDFs, Office documents, ZIP archives, JSON, and the S/MIME application/pkcs7-* types. This broad check is a quick way to flag "binary document" parts, though you will usually look at the specific subtype to decide how to handle each.

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llSuccess = .F.

//  Demonstrates the Mime.IsApplicationData method, which returns whether the Content-Type begins with application/.  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("CkMime")
llSuccess = loMime.LoadMimeFile("qa_data/multipart_message.eml")
if (llSuccess = .F.) then
    ? loMime.LastErrorText
    release loMime
    return
endif

n = loMime.NumParts
loPart = createobject("CkMime")

for i = 0 to n - 1
    llSuccess = loMime.PartAt(i,loPart)
    if (llSuccess = .F.) then
        ? loMime.LastErrorText
        release loMime
        release loPart
        return
    endif

    if (loPart.IsApplicationData()) then
        ? "Part " + str(i) + " (" + loPart.ContentType + ") is application data."
    endif

next


release loMime
release loPart