HttpClientStudy/HttpClientStudy.Core/CustomHttpClient/TokenDelegatingHandler.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Microsoft.Net.Http.Headers;

namespace HttpClientStudy.Core.CustomHttpClient
{
    /// <summary>
    /// oken管理中间件
    /// </summary>
    public class TokenDelegatingHandler : DelegatingHandler 
    {
        protected override HttpResponseMessage Send(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            Console.WriteLine("TokenDelegatingHandler -> Send -> Added Token");

            if (request.Headers.Authorization is null) 
            {
                request.Headers.Add(HeaderNames.Authorization, "Bearer " + "a.b.c");
            }

            HttpResponseMessage response = base.Send(request, cancellationToken);

            Console.WriteLine("TokenDelegatingHandler -> Send -> After");

            return response;
        }

        protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            Console.WriteLine("TokenDelegatingHandler -> SendAsync -> Before");

            HttpResponseMessage response = await base.SendAsync(request, cancellationToken);

            Console.WriteLine("TokenDelegatingHandler -> SendAsync -> After");

            return response;
        }
    }
}