Add nullable int32, int64 json converters

pull/3951/head
crobibero 4 years ago
parent cd49beb7ad
commit 384a62dc08

@ -0,0 +1,55 @@
using System;
using System.Buffers;
using System.Buffers.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace MediaBrowser.Common.Json.Converters
{
/// <summary>
/// Converts a GUID object or value to/from JSON.
/// </summary>
public class JsonNullableInt32Converter : JsonConverter<int?>
{
/// <inheritdoc />
public override int? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
if (reader.TokenType == JsonTokenType.String)
{
ReadOnlySpan<byte> span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
if (Utf8Parser.TryParse(span, out int number, out int bytesConsumed) && span.Length == bytesConsumed)
{
return number;
}
var stringValue = reader.GetString().AsSpan();
// value is null or empty, just return null.
if (stringValue.IsEmpty)
{
return null;
}
if (int.TryParse(stringValue, out number))
{
return number;
}
}
return reader.GetInt32();
}
/// <inheritdoc />
public override void Write(Utf8JsonWriter writer, int? value, JsonSerializerOptions options)
{
if (value is null)
{
writer.WriteNullValue();
}
else
{
writer.WriteNumberValue(value.Value);
}
}
}
}

@ -0,0 +1,70 @@
using System;
using System.Buffers;
using System.Buffers.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace MediaBrowser.Common.Json.Converters
{
/// <summary>
/// Parse JSON string as nullable long.
/// Javascript does not support 64-bit integers.
/// </summary>
public class JsonNullableInt64Converter : 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;
}
var stringValue = reader.GetString().AsSpan();
// value is null or empty, just return null.
if (stringValue.IsEmpty)
{
return null;
}
// try to parse from a string if the above failed, this covers cases with other escaped/UTF characters
if (long.TryParse(stringValue, out number))
{
return number;
}
}
// fallback to default handling
return reader.GetInt64();
}
/// <summary>
/// Write long to JSON long.
/// </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)
{
if (value is null)
{
writer.WriteNullValue();
}
else
{
writer.WriteNumberValue(value.Value);
}
}
}
}

@ -29,9 +29,11 @@ namespace MediaBrowser.Common.Json
options.Converters.Add(new JsonGuidConverter()); options.Converters.Add(new JsonGuidConverter());
options.Converters.Add(new JsonInt32Converter()); options.Converters.Add(new JsonInt32Converter());
options.Converters.Add(new JsonNullableInt32Converter());
options.Converters.Add(new JsonStringEnumConverter()); options.Converters.Add(new JsonStringEnumConverter());
options.Converters.Add(new JsonNonStringKeyDictionaryConverterFactory()); options.Converters.Add(new JsonNonStringKeyDictionaryConverterFactory());
options.Converters.Add(new JsonInt64Converter()); options.Converters.Add(new JsonInt64Converter());
options.Converters.Add(new JsonNullableInt64Converter());
options.Converters.Add(new JsonDoubleConverter()); options.Converters.Add(new JsonDoubleConverter());
return options; return options;

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