json-canonicalizer/JsonCanonicalizer/Program.cs

using System.Text.Json;

namespace JsonCanonicalizer
{
    class Program
    {
        static int Main(string[] args)
        {
            try
            {
                using var inputStream = Console.OpenStandardInput();
                using var doc = JsonDocument.Parse(inputStream);

                var writerOptions = new JsonWriterOptions
                {
                    Indented = true,
                    Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
                };

                using var outputStream = Console.OpenStandardOutput();
                using var writer = new Utf8JsonWriter(outputStream, writerOptions);

                BL.Canonicalizer.WriteSorted(writer, doc.RootElement);
                writer.Flush();

                Console.Out.WriteLine();
                return 0;
            }
            catch (JsonException ex)
            {
                Console.Error.WriteLine($"Invalid JSON: {ex.Message}");
                return 1;
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine($"Error: {ex.Message}");
                return 1;
            }
        }
    }
}