httpmessagehandler - 阅读内容(httpmessagehandler - re

我创建一个消息处理程序，其将记录请求和响应。最好我想

public class LoggingMessageHandler : DelegatingHandler
{
    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        LogRequest(request);

        return base.SendAsync(request, cancellationToken).ContinueWith(task =>
        {
            var response = task.Result;

            LogResponse(response);

            return response;
        });
    }

    private void LogRequest(HttpRequestMessage request)
    {
        var writer = request.GetConfiguration().Services.GetTraceWriter();
        var content = request.Content;

        (content ?? new StringContent("")).ReadAsStringAsync().ContinueWith(x =>
        {
            writer.Trace(request, "request", System.Web.Http.Tracing.TraceLevel.Info, t =>
            {
                t.Message = x.Result;
            });
        });
    }

    private void LogResponse(HttpResponseMessage response)
    {
        var request = response.RequestMessage;
        var writer = request.GetConfiguration().Services.GetTraceWriter();
        var content = response.Content;

        (content ?? new StringContent("")).ReadAsStringAsync().ContinueWith(x =>
        {
            writer.Trace(request, "response", System.Web.Http.Tracing.TraceLevel.Info, t => 
            {
                t.Status = response.StatusCode;
                t.Message = x.Result;
            });
        });
    }
}

这里是我的客户端代码。

public ActionResult Index()
{
    var profile = Client.GetAsync("Vendor").Result.EnsureSuccessStatusCode().Content.ReadAsAsync<VendorProfileModel>().Result;
    return View(profile);
}

记录似乎是工作。然而，当这个处理程序注册我的客户端代码返回一个空的对象。如果我删除此处理的模型成功从响应读取并显示在屏幕上。

有没有办法阅读的内容，并显示在客户端上的结果？

几天上网上周围挖后，我终于找到了问题的根源和解决方案。首先的问题：