OpenTween.ShortUrl.ShortenByUxnuAsync C# (CSharp) Метод

        private async Task<Uri> ShortenByUxnuAsync(Uri srcUri)
        {
            // 明らかに長くなると推測できる場合は短縮しない
            if ("http://ux.nx/xxxxxx".Length > srcUri.OriginalString.Length)
                return srcUri;

            var query = new Dictionary<string, string>
            {
                ["format"] = "plain",
                ["url"] = srcUri.OriginalString,
            };

            var uri = new Uri("http://ux.nu/api/short?" + MyCommon.BuildQueryString(query));
            using (var response = await this.http.GetAsync(uri).ConfigureAwait(false))
            {
                response.EnsureSuccessStatusCode();

                var result = await response.Content.ReadAsStringAsync()
                    .ConfigureAwait(false);

                if (!Regex.IsMatch(result, @"^https?://"))
                    throw new WebApiException("Failed to create URL.", result);

                return new Uri(result.TrimEnd());
            }
        }