(Swift) SNS Publish (Send Message)

Sends a message to all of a topic's subscribed endpoints.

See SNS Publish for more information.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let rest = CkoRest()!

    // Connect to the Amazon AWS REST server.
    // such as https://sns.us-west-2.amazonaws.com/
    var bTls: Bool = true
    var port: Int = 443
    var bAutoReconnect: Bool = true
    var success: Bool = rest.connect("sns.us-west-2.amazonaws.com", port: port, tls: bTls, autoReconnect: bAutoReconnect)

    // Provide AWS credentials for the REST call.
    let authAws = CkoAuthAws()!
    authAws.accessKey = "AWS_ACCESS_KEY"
    authAws.secretKey = "AWS_SECRET_KEY"
    // the region should match our URL above..
    authAws.region = "us-west-2"
    authAws.serviceName = "sns"

    rest.setAuthAws(authAws)

    rest.addQueryParam("Action", value: "Publish")
    rest.addQueryParam("TopicArn", value: "arn:aws:sns:us-west-2:957491831129:chilkat")
    // For subscribed email addresses, this is the subject of the email.
    rest.addQueryParam("Subject", value: "Test Message from Amazon SNS")
    rest.addQueryParam("Message", value: "This is a test message from Amazon SNS")

    var responseXml: String? = rest.fullRequestNoBody("GET", uriPath: "/")
    if rest.lastMethodSuccess != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.responseStatusCode.intValue != 200 {
        print("response status code = \(rest.responseStatusCode.intValue)")
        print("response status text = \(rest.responseStatusText!)")
        print("response header: \(rest.responseHeader!)")
        print("response body: \(responseXml!)")
        return
    }

    // Examine the successful XML response.
    let xml = CkoXml()!
    xml.load(responseXml)
    print("\(xml.getXml()!)")

    // To get the MessageId
    print("MessageId: \(xml.chilkatPath("PublishResult|MessageId|*")!)")

    // A sample successful response:
    // <?xml version="1.0" encoding="utf-8" ?>
    // <PublishResponse xmlns="http://sns.amazonaws.com/doc/2010-03-31/">
    //     <PublishResult>
    //         <MessageId>5e135f2e-898d-5006-940a-0f43829c764b</MessageId>
    //     </PublishResult>
    //     <ResponseMetadata>
    //         <RequestId>9adbf47d-9e07-5981-bb7f-a4609a167fcc</RequestId>
    //     </ResponseMetadata>
    // </PublishResponse>

}