UdcxRemediation.Console.SharePointContext.GetSPHostUrl C# (CSharp) Method

        public static Uri GetSPHostUrl(HttpRequestBase httpRequest)
        {
            if (httpRequest == null)
            {
                throw new ArgumentNullException("httpRequest");
            }

            string spHostUrlString = TokenHelper.EnsureTrailingSlash(httpRequest.QueryString[SPHostUrlKey]);
            Uri spHostUrl;
            if (Uri.TryCreate(spHostUrlString, UriKind.Absolute, out spHostUrl) &&
                (spHostUrl.Scheme == Uri.UriSchemeHttp || spHostUrl.Scheme == Uri.UriSchemeHttps))
            {
                return spHostUrl;
            }

            return null;
        }