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[英]How to 'clone' an incoming ASP.NET MVC Multipart request to send to a Web API controller
[英]Reading every incoming request (URL) in ASP.NET WEB API
我使用的是ASP.NET MVC
框架。 在此框架中,我们检查了某些密钥的每个传入请求(url)并将其分配给属性。 我们创建了一个派生自Controller
类的自定义类,我们重写 OnActionExecuting()
以提供我们的自定义逻辑。
我们如何在ASP.NET WEB API中实现相同的目标?
//Implementation from ASP.NET MVC
public class ApplicationController : Controller
{
public string UserID { get; set; }
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (!string.IsNullOrEmpty(Request.Params["uid"]))
UserID = Request.Params["uid"];
base.OnActionExecuting(filterContext);
}
}
我在ASP.NET WEB API中尝试过的: - 虽然这是有效的,但我想知道这是否是正确的方法?
创建了一个基本控制器
public class BaseApiController : ApiController
{
public string UserID { get; set; }
}
创建了另一个继承ActionFilterAttribute类的类,我重写了OnActionExecuting()
public class TokenFilterAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
{
var queryString = actionContext.Request.RequestUri.Query;
var items = HttpUtility.ParseQueryString(queryString);
var userId = items["uid"];
((MyApi.Data.Controllers.BaseApiController)(actionContext.ControllerContext.Controller)).UserID = userId;
}
}
现在注册这个课程
public static void Register(HttpConfiguration config)
{
config.Filters.Add(new TokenFilterAttribute());
}
您可以使用ASP.NET Web API中的消息处理程序。 当您需要从查询字符串,URL或HTTP标头获取一些用户令牌时,这是一种典型的安全方案
http://www.asp.net/web-api/overview/advanced/http-message-handlers
1.当您只需从URL中提取userId时,请将其用作Api方法的参数,ASP.NET WebAPI将为您工作,如
[HttpGet, Route("{userId}/roles")]
public UserRoles GetUserRoles(string userId, [FromUri] bool isExternalUser = true)
它适用于此类请求
http://.../15222/roles?isExternalUser=false
2.如果是安全方案,请参考http://www.asp.net/web-api/overview/security/authentication-and-authorization-in-aspnet-web-api基本上你需要一些MessageHandler或者你也可以使用过滤器属性,它是ASP.NET Web API中拦截每个调用的机制。
如果您需要处理每个请求,那么MessageHandler就是您的方式。 您需要实现MessageHanler然后注册它。
简单地说,典型的MessageHandler是从MessageHandler派生的类或者使用SendAsync方法覆盖的DelegatingHandler:
class AuthenticationHandler : DelegatingHandler
{
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
// Your code here
return base.SendAsync(request, cancellationToken);
}
}
And you need register it
static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Other code for WebAPI registerations here
config.MessageHandlers.Add(new AuthenticationHandler());
}
}
并从Global.asax.cs调用它
WebApiConfig.Register(GlobalConfiguration.Configuration);
这种处理程序的虚拟hypotetical实现的一些示例(这里你需要从IPrincipal和IIdentity的UidIdentity中补充你的UidPrincipal)
public class AuthenticationHandler : DelegatingHandler
{
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
try
{
var queryString = actionContext.Request.RequestUri.Query;
var items = HttpUtility.ParseQueryString(queryString);
var userId = items["uid"];
// Here check your UID and maybe some token, just dummy logic
if (userId == "D8CD2165-52C0-41E1-937F-054F24266B65")
{
IPrincipal principal = new UidPrincipal(new UidIdentity(uid), null);
// HttpContext exist only when hosting as asp.net web application in IIS or IISExpress
if (HttpContext.Current != null)
{
HttpContext.Current.User = principal;
}
else
{
Thread.CurrentPrincipal = principal;
}
return base.SendAsync(request, cancellationToken);
}
catch (Exception ex)
{
this.Log().Warn(ex.ToString());
return this.SendUnauthorizedResponse(ex.Message);
}
}
else
{
return this.SendUnauthorizedResponse();
}
}
catch (SecurityTokenValidationException)
{
return this.SendUnauthorizedResponse();
}
}
}
并允许从一些ASP.NET WebApi方法或WebAPI类中的某些属性访问它
var uid = ((UidIdentity)User.Identity).Uid
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