Swift

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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Swift


func chilkatTest() {
    var success: Bool = 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.

    let mime = CkoMime()!
    success = mime.loadFile(path: "qa_data/multipart_message.eml")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    var n: Int = mime.numParts.intValue
    let part = CkoMime()!
    var i: Int
    for i = 0; i <= n - 1; i++ {
        success = mime.part(at: i, subPart: part)
        if success == false {
            print("\(mime.lastErrorText!)")
            return
        }

        if part.isAttachment() {
            print("Part \(i) (\(part.contentType!)) is an attachment.")
        }

    }


}