(Swift 3,4,5...) Send XML REST Request, Get Response with No Body (Google Cloud Storage)

Demonstrates sending a RESTful XML request, and receiving a response where the expected response is a header with no body (Content-Length = 0). This example will create a bucket in Google Cloud Storage using the Google Cloud Storage XML API.

See Create a Bucket using the XML API for additional request options.

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func chilkatTest() {
    // This example will create a bucket in Google Cloud Storage using the XML API.
    var success: Bool

    // It requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let gAuth = CkoAuthGoogle()!
    // Obtain an access token as shown in one of the following examples:
    // See Get Access Token using a Service Account JSON Key
    // See Get Access Token using a P12 File

    let rest = CkoRest()!

    // Connect using TLS.
    var bAutoReconnect: Bool = true
    success = rest.connect("www.googleapis.com", port: 443, tls: true, autoReconnect: bAutoReconnect)

    // Provide the authentication credentials (i.e. the access key)
    success = rest.setAuthGoogle(gAuth)

    // Build the XML request body for creating a bucket.
    // See https://cloud.google.com/storage/docs/xml-api/put-bucket-create
    let xmlReqBody = CkoXml()!
    xmlReqBody.tag = "CreateBucketConfiguration"
    xmlReqBody.newChild2("LocationConstraint", content: "us")
    xmlReqBody.newChild2("StorageClass", content: "STANDARD")

    // Show the HTTP request body we'll be sending.
    print("\(xmlReqBody.getXml()!)")

    // There are no query parameters...

    // The HOST header must be specified, because it needs to be different than
    // the domain previously passed to the Connect method.
    // The name of the bucket is the 1st part of the HOST header.
    success = rest.addHeader("Host", value: "chilkat-example-bucket.storage.googleapis.com")

    // The project ID is specified in an HTTP request header
    success = rest.addHeader("x-goog-project-id", value: "chilkattest-1050")

    // In this case, the response body is expected to be empty.  We can still
    // call FullRequestString.  We expect an empty string to be returned.
    var responseStr: String? = rest.fullRequest("PUT", uriPath: "/", bodyText: xmlReqBody.getXml())
    if rest.lastMethodSuccess != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // Check the response status code to make sure it is 200.
    var responseStatus: Int = rest.responseStatusCode.intValue
    print("Response Status Code = \(responseStatus)")

}