Swift

Get Delivery-Status Info as JSON

Demonstrates the Chilkat Email.GetDsnInfo method, which — when IsMultipartReport indicates the email is a multipart/report — obtains the delivery-status information as a JsonObject. This example loads a bounce message, confirms it is a report, and prints the extracted DSN details as JSON.

Background: A bounce (DSN) carries its key facts — which recipient failed, the status code, the reporting server — in a machine-readable message/delivery-status part. Rather than parsing those raw fields yourself, GetDsnInfo gathers them into a structured JSON document you can query with the JsonObject API, making it easy to automate bounce handling and prune failed addresses from a mailing list.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the GetDsnInfo method, which, for a multipart/report email, obtains the
    //  delivery-status information as a JSON object.

    let email = CkoEmail()!

    success = email.loadEml(mimePath: "qa_data/eml/dsn_bounce.eml")
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    //  Only meaningful for a multipart/report email.
    if email.isMultipartReport() == true {
        let json = CkoJsonObject()!
        success = email.getDsnInfo(json: json)
        if success == true {
            print("\(json.emit()!)")
        }

    }
    else {
        print("This email is not a multipart/report.")
    }

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

}