c# - WebApi 在过滤器中获取帖子原始正文

Question

我正在创建一个日志，我需要检索请求正文以保存在数据库中。我用 HttpActionContext 创建了一个过滤器。 我尝试通过 filterContext.Request.Content.ReadAsStringAsync().Result 进行恢复； 但它总是返回一个空字符串。

日志过滤器.cs

public override void OnActionExecuting(HttpActionContext filterContext)
    {
        try
        {
            Task<string> content = filterContext.Request.Content.ReadAsStringAsync();
            string body = content.Result;

            logModel.RequestLog rl = new logModel.RequestLog();
            rl.IP = ((HttpContextWrapper)filterContext.Request.Properties["MS_HttpContext"]).Request.UserHostAddress;
            rl.Type = filterContext.ControllerContext.RouteData.Values["controller"].ToString().ToUpper();
            rl.URL = filterContext.Request.RequestUri.OriginalString;
            rl.Operation = filterContext.Request.Method.Method;
            rl.RequestDate = DateTime.Now;


            filterContext.ControllerContext.RouteData.Values.Add("reqID", new deviceLog.RequestLog().Add(rl).ID.ToString());
        }
        catch { }
        //return new deviceLog.RequestLog().Add(rl);
        base.OnActionExecuting(filterContext);
    }

Answer 1

也许请求流已经结束。尝试将流位置重置为开头:

public class MyAttribute:ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionContext actionContext)
    {
        string rawRequest;
        using (var stream = new StreamReader(actionContext.Request.Content.ReadAsStreamAsync().Result))
        {
            stream.BaseStream.Position = 0;
            rawRequest = stream.ReadToEnd();
        }
    }
}