jellyfin/MediaBrowser.Common/Json/Converters/JsonInt64Converter.cs
2020-05-22 10:48:01 -06:00

57 lines
2.0 KiB
C#

using System;
using System.Buffers;
using System.Buffers.Text;
using System.Globalization;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace MediaBrowser.Common.Json.Converters
{
/// <summary>
/// Long to String JSON converter.
/// Javascript does not support 64-bit integers.
/// </summary>
public class JsonInt64Converter : JsonConverter<long>
{
/// <summary>
/// Read JSON string as int64.
/// </summary>
/// <param name="reader"><see cref="Utf8JsonReader"/>.</param>
/// <param name="type">Type.</param>
/// <param name="options">Options.</param>
/// <returns>Parsed value.</returns>
public override long Read(ref Utf8JsonReader reader, Type type, JsonSerializerOptions options)
{
if (reader.TokenType == JsonTokenType.String)
{
// try to parse number directly from bytes
var span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
if (Utf8Parser.TryParse(span, out long number, out var bytesConsumed) && span.Length == bytesConsumed)
{
return number;
}
// try to parse from a string if the above failed, this covers cases with other escaped/UTF characters
if (long.TryParse(reader.GetString(), out number))
{
return number;
}
}
// fallback to default handling
return reader.GetInt64();
}
/// <summary>
/// Write long to JSON string.
/// </summary>
/// <param name="writer"><see cref="Utf8JsonWriter"/>.</param>
/// <param name="value">Value to write.</param>
/// <param name="options">Options.</param>
public override void Write(Utf8JsonWriter writer, long value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToString(NumberFormatInfo.InvariantInfo));
}
}
}