(Swift 3,4,5...) S3 - Upload to Bucket in a Region

Demonstrates how to upload a file to an S3 bucket that was created in a particular region.

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

    // When usig the REST class to access an S3 bucket that has been created in a particular region,
    // there are three important things to remember:
    // 
    // 1) Connect to the domain that includes the region.  For example, instead of connecting to
    //    "s3.amazonaws.com", connect to "s3.eu-central-1.amazonaws.com" if your bucket is in the EU Frankfurt region.
    //    See http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region   for a list of S3 region domains (endpoints)
    // 
    // 2) Set the AuthAws.Region property equal to the region, such as "eu-central-1".
    // 
    // 3) Include the region in request's Host header.
    // 

    // This example will upload to a bucket in the eu-central-1 region.
    // 
    let rest = CkoRest()!

    // Connect to the Amazon AWS REST server.
    var bTls: Bool = true
    var port: Int = 443
    var bAutoReconnect: Bool = true
    var success: Bool = rest.connect("s3.eu-central-1.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"
    authAws.serviceName = "s3"
    authAws.region = "eu-central-1"
    success = rest.setAuthAws(authAws)

    // Set the bucket name via the HOST header.
    // In this case, the bucket name is "chilkateufrankfurt" (which was created in the eu-central-1 region)
    rest.host = "chilkateufrankfurt.s3.eu-central-1.amazonaws.com"

    let fileData = CkoBinData()!
    success = fileData.loadFile("qa_data/jpg/penguins.jpg")

    // Upload the file to Amazon S3.
    let responseBody = CkoStringBuilder()!
    success = rest.fullRequestBd("PUT", uriPath: "/penguins.jpg", binData: fileData, responseBody: responseBody)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // Did we get a 200 response indicating success?
    var statusCode: Int = rest.responseStatusCode.intValue
    if statusCode != 200 {
        print("Error response: \(responseBody.getAsString()!)")
        print("Status code: \(statusCode), Status text: \(rest.responseStatusText!)")
        return
    }

    print("File successfully uploaded.")

}