PureBasic

Unzip an Email's Zip Attachments

Demonstrates the Chilkat Email.UnzipAttachments method, which unzips and replaces any Zip file attachments with their expanded contents. For example, if an email contains a single Zip holding three files, that Zip attachment is replaced by the three files as individual attachments. This example loads an email and expands its Zip attachments.

Background: Senders often bundle several files into one .zip to keep a message tidy or to compress large content. UnzipAttachments reverses that automatically, so downstream processing can work with the individual files directly rather than having to detect, extract, and re-inject archive contents. It is the inverse of ZipAttachments.

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IncludeFile "CkEmail.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the UnzipAttachments method, which unzips and replaces any Zip file
    ;  attachments with their expanded contents.  For example, a single Zip containing 3 files
    ;  is replaced by those 3 files as individual attachments.

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkEmail::ckLoadEml(email,"qa_data/eml/with_zip_attachment.eml")
    If success = 0
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    Debug "NumAttachments before = " + Str(CkEmail::ckNumAttachments(email))

    ;  Expand any Zip attachments in place.
    success = CkEmail::ckUnzipAttachments(email)
    If success = 0
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    Debug "NumAttachments after = " + Str(CkEmail::ckNumAttachments(email))

    ;  Note: The path "qa_data/..." is a relative local filesystem path,
    ;  relative to the current working directory of the running application.


    CkEmail::ckDispose(email)


    ProcedureReturn
EndProcedure