Big5 Url Decoder

Big5UrlDecoder.cs

// MIT License
// 
// Copyright © 2023 Orlys (Orlys Ma)
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.


using System.Text;
using System.Web;

internal static class Big5UrlDecoder
{
    private static readonly Encoding s_big5;

    static Big5UrlDecoder()
    {
        // install nuget package: 'System.Text.Encoding.CodePages'
        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
        s_big5 = Encoding.GetEncoding("big5");
    }
    public static string Decode(string urlEncoded, Encoding outputEncoding = null)
    {
        outputEncoding ??= Encoding.Unicode;
        var sourceBytes = HttpUtility.UrlDecodeToBytes(urlEncoded, s_big5);
        var convertedBytes = Encoding.Convert(s_big5, outputEncoding, sourceBytes);
        var str = outputEncoding.GetString(convertedBytes);

        return str;
    }
}