CkPython

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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import sys
import chilkat

success = False

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

#  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 = mime.get_NumParts()
print("Number of parts: " + str(n))

part = chilkat.CkMime()

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

    print("Part " + str(i) + " Content-Type: " + part.contentType())