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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
using System.Text.Json.Serialization;
using Microsoft.AspNetCore.Mvc;
namespace Microsoft.AspNetCore.Http;
internal sealed class ProblemDetailsJsonConverter : JsonConverter<ProblemDetails>
{
private static readonly JsonEncodedText Type = JsonEncodedText.Encode("type");
private static readonly JsonEncodedText Title = JsonEncodedText.Encode("title");
private static readonly JsonEncodedText Status = JsonEncodedText.Encode("status");
private static readonly JsonEncodedText Detail = JsonEncodedText.Encode("detail");
private static readonly JsonEncodedText Instance = JsonEncodedText.Encode("instance");
[UnconditionalSuppressMessage("Trimmer", "IL2026", Justification = "Trimmer does not allow annotating overriden methods with annotations different from the ones in base type.")]
public override ProblemDetails Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var problemDetails = new ProblemDetails();
if (reader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException("Unexpected end when reading JSON.");
}
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
ReadValue(ref reader, problemDetails, options);
}
if (reader.TokenType != JsonTokenType.EndObject)
{
throw new JsonException("Unexpected end when reading JSON.");
}
return problemDetails;
}
[UnconditionalSuppressMessage("Trimmer", "IL2026", Justification = "Trimmer does not allow annotating overriden methods with annotations different from the ones in base type.")]
public override void Write(Utf8JsonWriter writer, ProblemDetails value, JsonSerializerOptions options)
{
writer.WriteStartObject();
WriteProblemDetails(writer, value, options);
writer.WriteEndObject();
}
[RequiresUnreferencedCode("JSON serialization and deserialization of ProblemDetails.Extensions might require types that cannot be statically analyzed.")]
internal static void ReadValue(ref Utf8JsonReader reader, ProblemDetails value, JsonSerializerOptions options)
{
if (TryReadStringProperty(ref reader, Type, out var propertyValue))
{
value.Type = propertyValue;
}
else if (TryReadStringProperty(ref reader, Title, out propertyValue))
{
value.Title = propertyValue;
}
else if (TryReadStringProperty(ref reader, Detail, out propertyValue))
{
value.Detail = propertyValue;
}
else if (TryReadStringProperty(ref reader, Instance, out propertyValue))
{
value.Instance = propertyValue;
}
else if (reader.ValueTextEquals(Status.EncodedUtf8Bytes))
{
reader.Read();
if (reader.TokenType == JsonTokenType.Null)
{
// Nothing to do here.
}
else
{
value.Status = reader.GetInt32();
}
}
else
{
var key = reader.GetString()!;
reader.Read();
value.Extensions[key] = JsonSerializer.Deserialize(ref reader, typeof(object), options);
}
}
internal static bool TryReadStringProperty(ref Utf8JsonReader reader, JsonEncodedText propertyName, [NotNullWhen(true)] out string? value)
{
if (!reader.ValueTextEquals(propertyName.EncodedUtf8Bytes))
{
value = default;
return false;
}
reader.Read();
value = reader.GetString()!;
return true;
}
[RequiresUnreferencedCode("JSON serialization and deserialization of ProblemDetails.Extensions might require types that cannot be statically analyzed.")]
internal static void WriteProblemDetails(Utf8JsonWriter writer, ProblemDetails value, JsonSerializerOptions options)
{
if (value.Type != null)
{
writer.WriteString(Type, value.Type);
}
if (value.Title != null)
{
writer.WriteString(Title, value.Title);
}
if (value.Status != null)
{
writer.WriteNumber(Status, value.Status.Value);
}
if (value.Detail != null)
{
writer.WriteString(Detail, value.Detail);
}
if (value.Instance != null)
{
writer.WriteString(Instance, value.Instance);
}
foreach (var kvp in value.Extensions)
{
writer.WritePropertyName(kvp.Key);
JsonSerializer.Serialize(writer, kvp.Value, kvp.Value?.GetType() ?? typeof(object), options);
}
}
}
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