mcs/class/System.Web.Routing/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 #if NET_4_0
  40         [TypeForwardedFrom ("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
  41 #endif
  42         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  43         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  44         public class HttpMethodConstraint : IRouteConstraint
  45         {
  46                 public HttpMethodConstraint (params string[] allowedMethods)
  47                 {
  48                         if (allowedMethods == null)
  49                                 throw new ArgumentNullException ("allowedMethods");
  50                         AllowedMethods = allowedMethods;
  51                 }
  52
  53                 public ICollection<string> AllowedMethods { get; private set; }
  54
  55                 bool IRouteConstraint.Match (HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
  56                 {
  57                         return Match (httpContext, route, parameterName, values, routeDirection);
  58                 }
  59
  60                 protected virtual bool Match (HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
  61                 {
  62                         if (httpContext == null)
  63                                 throw new ArgumentNullException ("httpContext");
  64                         if (route == null)
  65                                 throw new ArgumentNullException ("route");
  66                         if (parameterName == null)
  67                                 throw new ArgumentNullException ("parameterName");
  68                         if (values == null)
  69                                 throw new ArgumentNullException ("values");
  70
  71                         foreach (string allowed in AllowedMethods)
  72                                 // LAMESPEC: .NET allows case-insensitive comparison, which violates RFC 2616
  73                                 if (httpContext.Request.HttpMethod == allowed)
  74                                         return true;
  75
  76                         return false;
  77                 }
  78         }
  79 }