mcs/class/System.Web/System.Web.Routing/HttpMethodConstraint.cs

   1 //
   2 // HttpMethodConstraint.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell Inc. http://novell.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 using System;
  31 using System.Collections;
  32 using System.Collections.Generic;
  33 using System.Runtime.CompilerServices;
  34 using System.Security.Permissions;
  35 using System.Web;
  36
  37 namespace System.Web.Routing
  38 {
  39         [TypeForwardedFrom ("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
  40         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  41         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  42         public class HttpMethodConstraint : IRouteConstraint
  43         {
  44                 public HttpMethodConstraint (params string[] allowedMethods)
  45                 {
  46                         if (allowedMethods == null)
  47                                 throw new ArgumentNullException ("allowedMethods");
  48                         AllowedMethods = allowedMethods;
  49                 }
  50
  51                 public ICollection<string> AllowedMethods { get; private set; }
  52
  53                 bool IRouteConstraint.Match (HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
  54                 {
  55                         return Match (httpContext, route, parameterName, values, routeDirection);
  56                 }
  57
  58                 protected virtual bool Match (HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
  59                 {
  60                         if (httpContext == null)
  61                                 throw new ArgumentNullException ("httpContext");
  62                         if (route == null)
  63                                 throw new ArgumentNullException ("route");
  64                         if (parameterName == null)
  65                                 throw new ArgumentNullException ("parameterName");
  66                         if (values == null)
  67                                 throw new ArgumentNullException ("values");
  68
  69                         switch (routeDirection) {
  70                         case RouteDirection.IncomingRequest:
  71                                 // LAMESPEC: .NET allows case-insensitive comparison, which violates RFC 2616
  72                                 return AllowedMethods.Contains (httpContext.Request.HttpMethod);
  73
  74                         case RouteDirection.UrlGeneration:
  75                                 // See: aspnetwebstack's WebAPI equivalent for details.
  76                                 object method;
  77
  78                                 if (!values.TryGetValue (parameterName, out method))
  79                                         return true;
  80
  81                                 // LAMESPEC: .NET allows case-insensitive comparison, which violates RFC 2616
  82                                 return AllowedMethods.Contains (Convert.ToString (method));
  83
  84                         default:
  85                                 throw new ArgumentException ("Invalid routeDirection: " + routeDirection);
  86                         }
  87                 }
  88         }
  89 }