(Swift 3,4,5...) Parsing a Multipart/Digest Email

This example demonstrates how to parse a multipart/digest email. An email parsed by this sample could have a MIME structure as follows:

multipart/mixed
    text/plain
    text/plain
    multipart/digest
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
    text/plain

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // Note: This example requires Chilkat v9.5.0.66 or greater.

    var emlPath: String? = "qa_data/eml/multipart_digest.eml"

    let email = CkoEmail()!

    // For this example, we'll load the email from a .eml.
    // The email could alternatively be loaded as a result of downloading from an IMAP or POP3 server..

    var success: Bool = email.loadEml(emlPath)
    if success != true {
        print("\(email.lastErrorText!)")
        return
    }

    var numDigests: Int = email.numDigests.intValue
    print("num digests = \(numDigests)")

    var i: Int = 0
    while i < numDigests {
        var eDigest: CkoEmail? = email.getDigest(i)
        print("\(i):\(eDigest!.fromAddress!), \(eDigest!.subject!)")
        var m: String? = eDigest!.getHeaderField("Message")
        if eDigest!.lastMethodSuccess == true {
            print("    Message = \(m!)")
        }

        eDigest = nil
        i = i + 1
    }


}