CkPython

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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import sys
import chilkat

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 = chilkat.CkMime()
success = mime.LoadMimeFile("qa_data/multipart_message.eml")
if (success == False):
    print(mime.lastErrorText())
    sys.exit()

n = mime.get_NumParts()
part = chilkat.CkMime()

for i in range(0,n):
    success = mime.PartAt(i,part)
    if (success == False):
        print(mime.lastErrorText())
        sys.exit()

    if (part.IsAttachment()):
        print("Part " + str(i) + " (" + part.contentType() + ") is an attachment.")