Question

是否可以获取Web API控制器构造函数中的头信息？我想根据标题值设置变量，但我不想为每个方法执行此操作。我对自定义标头值特别感兴趣，但此时我会满足授权标准。我可以在AuthorizationFilterAttribute中使用它，但我也需要它在控制器级别。

[PolicyAuthorize]
public class PoliciesController : ApiController
{
    public PoliciesController()
    {
        var x = HttpContext.Current;  //will be null in constructor
    }

    public HttpResponseMessage Get()
    {
        var x = HttpContext.Current;  //will be available but too late
    }
}

public class PolicyAuthorizeAttribute : AuthorizationFilterAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        var authHeader = actionContext.Request.Headers.Authorization;  //can get at Authorization header here but no HTTPActionContext in controller
    }
}

Answer 1

以下是您可以考虑的一些选项...更喜欢1.而不是2.

将其他数据存储在当前请求消息的属性包HttpRequestMessage.Properties中，并在控制器中具有便捷属性，控制器中的所有操作都可以访问该属性。

[CustomAuthFilter]
public class ValuesController : ApiController
{
    public string Name
    {
        get
        {
            return Request.Properties["Name"].ToString();
        }
    }

    public string GetAll()
    {
        return this.Name;
    }
}

public class CustomAuthFilter : AuthorizationFilterAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        actionContext.Request.Properties["Name"] = "<your value from header>";
    }
}

您可以获取当前控制器的实例并设置属性值。例如：

[CustomAuthFilter]
public class ValuesController : ApiController
{
    public string Name { get; set; }

    public string GetAll()
    {
        return this.Name;
    }
}

public class CustomAuthFilter : AuthorizationFilterAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        ValuesController valuesCntlr = actionContext.ControllerContext.Controller as ValuesController;

        if (valuesCntlr != null)
        {
            valuesCntlr.Name = "<your value from header>";
        }
    }
}

Web API读取控制器构造函数中的标头值

1 个答案: