(Swift 3,4,5...) Send JSON REST Request, Get JSON Response

Demonstrates sending a RESTful JSON request, and receiving a JSON response. This example will create a bucket in Google Cloud Storage (which involves sending and receiving JSON).

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func chilkatTest() {
    // This example will create a bucket in Google Cloud Storage.
    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 JSON request body for creating a bucket.
    // The only required property is the "name", but we'll add more
    // to make a better example..
    let jsonReqBody = CkoJsonObject()!
    success = jsonReqBody.addString(at: -1, name: "name", value: "chilkat-bucket-c")
    success = jsonReqBody.addString(at: -1, name: "kind", value: "storage#bucket")
    success = jsonReqBody.addString(at: -1, name: "location", value: "US")
    success = jsonReqBody.add(at: -1, name: "versioning")

    var pObjVersioning: CkoJsonObject? = jsonReqBody.object(of: "versioning")
    success = pObjVersioning!.addBool(at: -1, name: "enabled", value: true)
    pObjVersioning = nil

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

    // Add the required query parameter.
    // See https://cloud.google.com/storage/docs/json_api/v1/buckets/insert
    success = rest.addQueryParam("project", value: "chilkattest-1050")

    // Add the Content-Type HTTP request header.
    success = rest.addHeader("Content-Type", value: "application/json; charset=UTF-8")

    var jsonResponseStr: String? = rest.fullRequest("POST", uriPath: "/storage/v1/b", bodyText: jsonReqBody.emit())
    if rest.lastMethodSuccess != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // Show the JSON response.  (See below for a sample JSON response.)
    print("Json Response: \(jsonResponseStr!)")

    // {
    //  "kind": "storage#bucket",
    //  "id": "chilkat-bucket-c",
    //  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket-c",
    //  "projectNumber": "999992999999",
    //  "name": "chilkat-bucket-c",
    //  "timeCreated": "2016-04-29T21:08:10.451Z",
    //  "updated": "2016-04-29T21:08:10.451Z",
    //  "metageneration": "1",
    //  "owner": {
    //   "entity": "project-owners-999992999999"
    //  },
    //  "location": "US",
    //  "versioning": {
    //   "enabled": true
    //  },
    //  "storageClass": "STANDARD",
    //  "etag": "CAE="
    // }
    // 

}