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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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;
namespace RoutingWebSite.HelloExtension
{
public class HelloMiddleware
{
private readonly RequestDelegate _next;
private readonly HelloOptions _helloOptions;
private readonly byte[] _helloPayload;
public HelloMiddleware(RequestDelegate next, IOptions<HelloOptions> helloOptions)
{
_next = next;
_helloOptions = helloOptions.Value;
var payload = new List<byte>();
payload.AddRange(Encoding.UTF8.GetBytes("Hello"));
if (!string.IsNullOrEmpty(_helloOptions.Greeter))
{
payload.Add((byte)' ');
payload.AddRange(Encoding.UTF8.GetBytes(_helloOptions.Greeter));
}
_helloPayload = payload.ToArray();
}
public Task InvokeAsync(HttpContext context)
{
var response = context.Response;
var payloadLength = _helloPayload.Length;
response.StatusCode = 200;
response.ContentType = "text/plain";
response.ContentLength = payloadLength;
return response.Body.WriteAsync(_helloPayload, 0, payloadLength);
}
}
}
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