.NET Framework拦截HTTP请求的实现

public class HTTPInterceptortHandler : DelegatingHandler
{
    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        // 根据需求调试，获取更多数据
        string requestIP = HttpContext.Current?.Request?.UserHostAddress;
        string requestContent = request.Content?.ReadAsStringAsync()?.Result;
        string requestUri = request.RequestUri.AbsoluteUri;

        return base.SendAsync(request, cancellationToken).ContinueWith<HttpResponseMessage>(
            (task) =>
            {
                string responseContent = task.Result.Content.ReadAsStringAsync().Result;
                string responseCode = task.Result.StatusCode.ToString();

                // 记录日志、加工一下结果等都可以在这里处理

                return task.Result;
            }
        );
    }
}

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        // 在 Application_Start 方法添加这一行
        GlobalConfiguration.Configuration.MessageHandlers.Add(new HTTPInterceptortHandler()); 
    }
}