Will service stack take me?? Still missing some PCL stuff, but I don't think this can be done PCL anyway..or if it can it's alot harder and I don't know how

HttpUtilExtensions.cs

 public static class HttpUtilExtensions
    {
        public static Task<string> PostJsonToUrlAsync(this string url, object data,
          Action<HttpWebRequest> requestFilter = null, Action<HttpWebResponse> responseFilter = null,
            Action<string> callback = null)
        {
            return SendStringToUrlAsync(url, method: "POST", requestBody: data.ToJson(), contentType: MimeTypes.Json, accept: MimeTypes.Json,
                requestFilter: requestFilter, responseFilter: responseFilter, callback: callback);
        }


        public static Task<string> SendStringToUrlAsync(this string url, string method = null, string requestBody = null,
            string contentType = null, string accept= "*/*", Action<HttpWebRequest> requestFilter = null,
            Action<HttpWebResponse> responseFilter = null, Action<string> callback = null)
        {
            var webReq = (HttpWebRequest)WebRequest.Create(url);
            if (method != null)
                webReq.Method = method;
            if (contentType != null)
                webReq.ContentType = contentType;

            webReq.Accept = accept;

            if (requestFilter != null)
            {
                requestFilter(webReq);
            }

            if (requestBody != null)
            {
                using (var reqStream = webReq.GetRequestStream())
                using (var writer = new StreamWriter(reqStream))
                {
                   writer.Write(requestBody); 
                }
            }
            
            var taskWebRes = webReq.GetResponseAsync();

            return taskWebRes.ContinueWith(task =>
            {
                var webResp = task.Result;

                using (var stream = webResp.GetResponseStream())
                using (var reader = new StreamReader(stream))
                {
                    return reader.ReadToEnd();
                }
            });
        }
    }