263 lines
8.3 KiB
C#
263 lines
8.3 KiB
C#
//
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// Route.cs
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//
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// Author:
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2008 Novell Inc. http://novell.com
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Runtime.CompilerServices;
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using System.Security.Permissions;
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using System.Text.RegularExpressions;
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using System.Web;
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using System.Globalization;
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namespace System.Web.Routing
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{
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[TypeForwardedFrom ("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
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[AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public class Route : RouteBase
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{
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static readonly Type httpRequestBaseType = typeof (HttpRequestBase);
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PatternParser url;
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public RouteValueDictionary Constraints { get; set; }
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public RouteValueDictionary DataTokens { get; set; }
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public RouteValueDictionary Defaults { get; set; }
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public IRouteHandler RouteHandler { get; set; }
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public string Url {
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get { return url != null ? url.Url : String.Empty; }
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set { url = value != null ? new PatternParser (value) : new PatternParser (String.Empty); }
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}
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public Route (string url, IRouteHandler routeHandler)
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: this (url, null, routeHandler)
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{
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}
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public Route (string url, RouteValueDictionary defaults, IRouteHandler routeHandler)
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: this (url, defaults, null, routeHandler)
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{
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}
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public Route (string url, RouteValueDictionary defaults, RouteValueDictionary constraints, IRouteHandler routeHandler)
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: this (url, defaults, constraints, null, routeHandler)
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{
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}
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public Route (string url, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary dataTokens, IRouteHandler routeHandler)
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{
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Url = url;
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Defaults = defaults;
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Constraints = constraints;
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DataTokens = dataTokens;
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RouteHandler = routeHandler;
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}
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public override RouteData GetRouteData (HttpContextBase httpContext)
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{
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var path = httpContext.Request.AppRelativeCurrentExecutionFilePath;
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var pathInfo = httpContext.Request.PathInfo;
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if (!String.IsNullOrEmpty (pathInfo))
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path += pathInfo;
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// probably code like this causes ArgumentOutOfRangeException under .NET.
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// It somehow allows such path that is completely equivalent to the Url. Dunno why.
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if (Url != path && path.Substring (0, 2) != "~/")
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return null;
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path = path.Substring (2);
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var values = url.Match (path, Defaults);
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if (values == null)
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return null;
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if (!ProcessConstraints (httpContext, values, RouteDirection.IncomingRequest))
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return null;
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var rd = new RouteData (this, RouteHandler);
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RouteValueDictionary rdValues = rd.Values;
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foreach (var p in values)
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rdValues.Add (p.Key, p.Value);
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RouteValueDictionary dataTokens = DataTokens;
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if (dataTokens != null) {
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RouteValueDictionary rdDataTokens = rd.DataTokens;
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foreach (var token in dataTokens)
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rdDataTokens.Add (token.Key, token.Value);
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}
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return rd;
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}
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public override VirtualPathData GetVirtualPath (RequestContext requestContext, RouteValueDictionary values)
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{
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if (requestContext == null)
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throw new ArgumentNullException ("requestContext");
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if (url == null)
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return new VirtualPathData (this, String.Empty);
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// null values is allowed.
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// if (values == null)
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// values = requestContext.RouteData.Values;
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RouteValueDictionary usedValues;
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string resultUrl = url.BuildUrl (this, requestContext, values, Constraints, out usedValues);
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if (resultUrl == null)
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return null;
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if (!ProcessConstraints (requestContext.HttpContext, usedValues, RouteDirection.UrlGeneration))
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return null;
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var result = new VirtualPathData (this, resultUrl);
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RouteValueDictionary dataTokens = DataTokens;
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if (dataTokens != null) {
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foreach (var item in dataTokens)
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result.DataTokens[item.Key] = item.Value;
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}
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return result;
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}
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private bool ProcessConstraintInternal (HttpContextBase httpContext, Route route, object constraint, string parameterName,
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RouteValueDictionary values, RouteDirection routeDirection, RequestContext reqContext,
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out bool invalidConstraint)
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{
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invalidConstraint = false;
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IRouteConstraint irc = constraint as IRouteConstraint;
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if (irc != null)
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return irc.Match (httpContext, route, parameterName, values, routeDirection);
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string s = constraint as string;
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if (s != null) {
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string v = null;
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object o;
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// NOTE: If constraint was not an IRouteConstraint, is is asumed
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// to be an object 'convertible' to string, or at least this is how
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// ASP.NET seems to work by the tests i've done latelly. (pruiz)
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if (values != null && values.TryGetValue (parameterName, out o))
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v = Convert.ToString (o, CultureInfo.InvariantCulture);
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if (!String.IsNullOrEmpty (v))
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return MatchConstraintRegex (v, s);
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else if (reqContext != null) {
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RouteData rd = reqContext != null ? reqContext.RouteData : null;
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RouteValueDictionary rdValues = rd != null ? rd.Values : null;
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if (rdValues == null || rdValues.Count == 0)
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return false;
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if (!rdValues.TryGetValue (parameterName, out o))
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return false;
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v = Convert.ToString (o, CultureInfo.InvariantCulture);
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if (String.IsNullOrEmpty (v))
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return false;
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return MatchConstraintRegex (v, s);
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}
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return false;
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}
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invalidConstraint = true;
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return false;
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}
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static bool MatchConstraintRegex (string value, string constraint)
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{
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int len = constraint.Length;
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if (len > 0) {
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// Bug #651966 - regexp constraints must be treated
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// as absolute expressions
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if (constraint [0] != '^') {
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constraint = "^" + constraint;
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len++;
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}
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if (constraint [len - 1] != '$')
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constraint += "$";
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}
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return Regex.IsMatch (value, constraint, RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Compiled);
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}
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protected virtual bool ProcessConstraint (HttpContextBase httpContext, object constraint, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
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{
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if (parameterName == null)
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throw new ArgumentNullException ("parameterName");
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// .NET "compatibility"
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if (values == null)
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throw new NullReferenceException ();
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RequestContext reqContext;
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reqContext = SafeGetContext (httpContext != null ? httpContext.Request : null);
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bool invalidConstraint;
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bool ret = ProcessConstraintInternal (httpContext, this, constraint, parameterName, values, routeDirection, reqContext, out invalidConstraint);
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if (invalidConstraint)
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throw new InvalidOperationException (
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String.Format (
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"Constraint parameter '{0}' on the route with URL '{1}' must have a string value type or be a type which implements IRouteConstraint",
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parameterName, Url
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)
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);
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return ret;
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}
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private bool ProcessConstraints (HttpContextBase httpContext, RouteValueDictionary values, RouteDirection routeDirection)
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{
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var constraints = Constraints;
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if (Constraints != null) {
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foreach (var p in constraints)
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if (!ProcessConstraint (httpContext, p.Value, p.Key, values, routeDirection))
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return false;
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}
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return true;
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}
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RequestContext SafeGetContext (HttpRequestBase req)
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{
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if (req == null || req.GetType () != httpRequestBaseType)
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return null;
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return req.RequestContext;
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}
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}
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}
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