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拦截C#HttpClient GetAsync

我有一个Web项目(C#,MVC5但没有WebAPI)和一个简单的HTTP REST客户端,它调用外部REST服务并获取accessToken etcing.

我想检查我的所有Get/PostAsync调用对statusCode 401的响应,但我发现我只能SendAsync在实现时覆盖该方法DelegatingHandler.

class CustomDelegatingHandler : DelegatingHandler
{
    async protected override Task<HttpResponseMessage> SendAsync(
        HttpRequestMessage request, CancellationToken cancellationToken)
    {
        HttpResponseMessage response = await base.SendAsync(request, cancellationToken);

        if (response.StatusCode == HttpStatusCode.Unauthorized)
        {
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我还能做些什么,以免改变我所有的异步调用的实现SendAsync吗?

(我真正想要做的是刷新accessToken.)

c# httpclient sendasync

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