Get a Header Field of an Attachment

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Demonstrates the Chilkat Email.GetAttachmentHeader method, which returns the value of a named header field of an attachment. The first argument is the zero-based attachment index and the second is the MIME header-field name. This example reads the Content-Disposition header of the first attachment.

Background: Each attachment is a MIME part with its own header block. Where GetAttachmentAttr extracts a single named parameter, GetAttachmentHeader returns the entire value of a header field — for example the full Content-Disposition: attachment; filename="notes.txt" line. That is useful for inspecting or debugging exactly how a part is described, including any custom X- headers a sender may have added.

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    //  Demonstrates the GetAttachmentHeader method, which returns the value of a header field
    //  (by name) of an attachment.  The first argument is the zero-based attachment index and the second is the
    //  MIME header-field name.

    email := chilkat.NewEmail()
    email.SetSubject("Attachment header field")

    email.AddStringAttachment("notes.txt","Some notes.")

    //  Get the Content-Disposition header of the first attachment (index 0).
    disp := email.GetAttachmentHeader(0,"Content-Disposition")
    fmt.Println("Attachment 0 Content-Disposition: ", *disp)

    email.DisposeEmail()