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JsonMiddleware.cs
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JsonMiddleware.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.IO;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;
using Benchmarks.Configuration;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;
using Microsoft.AspNetCore.Http.Json;
using System.Text.Json.Serialization.Metadata;
namespace Benchmarks.Middleware
{
public class JsonMiddleware
{
private static readonly PathString _path = new PathString(Scenarios.GetPath(s => s.Json));
private const int _bufferSize = 27;
private readonly RequestDelegate _next;
public JsonMiddleware(RequestDelegate next)
{
_next = next;
}
public Task Invoke(HttpContext httpContext)
{
if (httpContext.Request.Path.StartsWithSegments(_path, StringComparison.Ordinal))
{
httpContext.Response.StatusCode = 200;
httpContext.Response.ContentLength = _bufferSize;
return httpContext.Response.WriteAsJsonAsync(new JsonMessage { message = "Hello, World!" }, CustomJsonContext.Default.JsonMessage);
}
return _next(httpContext);
}
}
public static class JsonMiddlewareExtensions
{
public static IApplicationBuilder UseJson(this IApplicationBuilder builder) => builder.UseMiddleware<JsonMiddleware>();
}
#if NET8_0_OR_GREATER
[JsonSourceGenerationOptions(JsonSerializerDefaults.Web)]
#else
[JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase)]
#endif
[JsonSerializable(typeof(JsonMessage))]
internal partial class CustomJsonContext : JsonSerializerContext
{
}
public struct JsonMessage
{
public string message { get; set; }
}
}