Question

我正在使用this从输入流中获取请求参数。 POST在请求正文中使用JSON。在我的onAuthorize函数中，它覆盖了AuthorizeAttribute。它确实给了我请求体参数，但是它会清空流，因此控制器不会收到任何请求参数：

 public override void OnAuthorization(AuthorizationContext filterContext)
    {
        filterContext.HttpContext.Request.InputStream.Length() //17 here
        string jsonPostData;
        using (var stream = filterContext.HttpContext.Request.InputStream)
        {
            stream.Position = 0;
            using (var reader = new System.IO.StreamReader(stream))
            {
                jsonPostData = reader.ReadToEnd();
            }
        }
        filterContext.HttpContext.InputStream.Length() //0 here
        filterContext.HttpContext.Request.InputStream.Position = 0; // still 0

  base.OnAuthorization(filterContext); //so when the request reaches controller its empty
}

我想我基本上要问的是如何在读取后重置输入流

Answer 1

阅读完流后，您可以在开头重置其位置：

stream.Position = 0;

在开始阅读流之前你已经这样做了，所以在阅读之后尝试以相同的方式重置它。

Answer 2

将代码更改为此内容并开始工作

public override void OnAuthorization(AuthorizationContext filterContext)
    {
        filterContext.HttpContext.Request.InputStream.Length() //17 here
        string jsonPostData;
        var stream = request.InputStream;
        var reader = new System.IO.StreamReader(stream);
        jsonPostData = reader.ReadToEnd();
        filterContext.HttpContext.InputStream.Length() //17 here
        filterContext.HttpContext.Request.InputStream.Position = 0; //17 here

  base.OnAuthorization(filterContext); //so when the request reaches controller its empty
}

在自定义AuthorizeAttribute中获取Post请求参数

2 个答案: