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

   1 //
   2 // Route.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.Security.Permissions;
  32 using System.Text.RegularExpressions;
  33 using System.Web;
  34
  35 namespace System.Web.Routing
  36 {
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         public class Route : RouteBase
  40         {
  41                 UrlPattern url;
  42
  43                 public RouteValueDictionary Constraints { get; set; }
  44
  45                 public RouteValueDictionary DataTokens { get; set; }
  46
  47                 public RouteValueDictionary Defaults { get; set; }
  48
  49                 public IRouteHandler RouteHandler { get; set; }
  50
  51                 public string Url {
  52                         get { return url != null ? url.Url : String.Empty; }
  53                         set { url = value != null ? new UrlPattern (value) : null; }
  54                 }
  55
  56                 public Route (string url, IRouteHandler routeHandler)
  57                         : this (url, null, routeHandler)
  58                 {
  59                 }
  60
  61                 public Route (string url, RouteValueDictionary defaults, IRouteHandler routeHandler)
  62                         : this (url, defaults, null, routeHandler)
  63                 {
  64                 }
  65
  66                 public Route (string url, RouteValueDictionary defaults, RouteValueDictionary constraints, IRouteHandler routeHandler)
  67                         : this (url, defaults, constraints, null, routeHandler)
  68                 {
  69                 }
  70
  71                 public Route (string url, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary dataTokens, IRouteHandler routeHandler)
  72                 {
  73                         Url = url;
  74                         Defaults = defaults;
  75                         Constraints = constraints;
  76                         DataTokens = dataTokens;
  77                         RouteHandler = routeHandler;
  78                 }
  79
  80                 public override RouteData GetRouteData (HttpContextBase httpContext)
  81                 {
  82                         var path = httpContext.Request.AppRelativeCurrentExecutionFilePath;
  83                         var pathInfo = httpContext.Request.PathInfo;
  84
  85                         if (pathInfo != String.Empty)
  86                                 throw new NotImplementedException ();
  87
  88                         // probably code like this causes ArgumentOutOfRangeException under .NET.
  89                         // It somehow allows such path that is completely equivalent to the Url. Dunno why.
  90                         if (Url != path && path.Substring (0, 2) != "~/")
  91                                 return null;
  92                         path = path.Substring (2);
  93
  94                         var values = url.Match (path, Defaults);
  95                         if (values == null)
  96                                 return null;
  97
  98                         if (Constraints != null)
  99                                 foreach (var p in Constraints)
 100                                         if (!ProcessConstraint (httpContext, p.Value, p.Key, values, RouteDirection.IncomingRequest))
 101                                                 return null;
 102
 103                         var rd = new RouteData (this, RouteHandler);
 104                         RouteValueDictionary rdValues = rd.Values;
 105
 106                         foreach (var p in values)
 107                                 rdValues.Add (p.Key, p.Value);
 108
 109                         return rd;
 110                 }
 111
 112                 public override VirtualPathData GetVirtualPath (RequestContext requestContext, RouteValueDictionary values)
 113                 {
 114                         if (requestContext == null)
 115                                 throw new ArgumentNullException ("requestContext");
 116                         if (url == null)
 117                                 return new VirtualPathData (this, String.Empty);
 118
 119                         // null values is allowed.
 120                         if (values == null)
 121                                 values = requestContext.RouteData.Values;
 122
 123                         string s;
 124                         if (!url.TrySubstitute (values, Defaults, out s))
 125                                 return null;
 126
 127                         return new VirtualPathData (this, s);
 128                 }
 129
 130                 protected virtual bool ProcessConstraint (HttpContextBase httpContext, object constraint, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
 131                 {
 132                         IRouteConstraint irc = constraint as IRouteConstraint;
 133                         if (irc != null)
 134                                 return irc.Match (httpContext, this, parameterName, values, routeDirection);
 135
 136                         string s = constraint as string;
 137                         if (s != null) {
 138                                 string v = values [parameterName] as string;
 139                                 return Regex.Match (v, s).Success;
 140                         }
 141
 142                         throw new InvalidOperationException (String.Format ("Constraint parameter '{0}' must be either a string or an IRouteConstraint instance", parameterName));
 143                 }
 144         }
 145 }