mcs/class/System.Web/System.Web.Configuration_2.0/HttpHandlerAction.cs

   1 //
   2 // System.Web.Configuration.HttpHandlerAction
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.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
  31 #if NET_2_0
  32
  33 using System;
  34 using System.ComponentModel;
  35 using System.Configuration;
  36 using System.Text.RegularExpressions;
  37 using System.Web.Util;
  38
  39 namespace System.Web.Configuration
  40 {
  41         public sealed class HttpHandlerAction: ConfigurationElement
  42         {
  43                 static ConfigurationPropertyCollection _properties;
  44                 static ConfigurationProperty pathProp;
  45                 static ConfigurationProperty typeProp;
  46                 static ConfigurationProperty validateProp;
  47                 static ConfigurationProperty verbProp;
  48
  49                 static HttpHandlerAction ()
  50                 {
  51                         pathProp = new ConfigurationProperty ("path", typeof (string), null,
  52                                                               TypeDescriptor.GetConverter (typeof (string)),
  53                                                               PropertyHelper.NonEmptyStringValidator,
  54                                                               ConfigurationPropertyOptions.IsRequired | ConfigurationPropertyOptions.IsKey);
  55                         typeProp = new ConfigurationProperty ("type", typeof (string), null,
  56                                                               TypeDescriptor.GetConverter (typeof (string)),
  57                                                               PropertyHelper.NonEmptyStringValidator,
  58                                                               ConfigurationPropertyOptions.IsRequired);
  59                         validateProp = new ConfigurationProperty ("validate", typeof (bool), true);
  60                         verbProp = new ConfigurationProperty ("verb", typeof (string), null,
  61                                                               TypeDescriptor.GetConverter (typeof (string)),
  62                                                               PropertyHelper.NonEmptyStringValidator,
  63                                                               ConfigurationPropertyOptions.IsRequired);
  64
  65                         _properties = new ConfigurationPropertyCollection ();
  66                         _properties.Add (pathProp);
  67                         _properties.Add (typeProp);
  68                         _properties.Add (validateProp);
  69                         _properties.Add (verbProp);
  70                 }
  71
  72                 internal HttpHandlerAction ()
  73                 { }
  74
  75                 public HttpHandlerAction (string path, string type, string verb)
  76                         : this (path, type, verb, true)
  77                 { }
  78
  79                 public HttpHandlerAction (string path, string type, string verb, bool validate)
  80                 {
  81                         Path = path;
  82                         Type = type;
  83                         Verb = verb;
  84                         Validate = validate;
  85                 }
  86
  87                 [ConfigurationProperty ("path", Options = ConfigurationPropertyOptions.IsRequired | ConfigurationPropertyOptions.IsKey)]
  88                 // LAMESPEC: MS lists no validator here but provides one in Properties.
  89                 public string Path {
  90                         get { return (string) base[pathProp]; }
  91                         set { base[pathProp] = value; }
  92                 }
  93
  94                 [ConfigurationProperty ("type", Options = ConfigurationPropertyOptions.IsRequired)]
  95                 // LAMESPEC: MS lists no validator here but provides one in Properties.
  96                 public string Type {
  97                         get { return (string) base[typeProp]; }
  98                         set { base[typeProp] = value; }
  99                 }
 100
 101                 [ConfigurationProperty ("validate", DefaultValue = true)]
 102                 public bool Validate {
 103                         get { return (bool) base[validateProp]; }
 104                         set { base[validateProp] = value; }
 105                 }
 106
 107                 [ConfigurationProperty ("verb", Options = ConfigurationPropertyOptions.IsRequired | ConfigurationPropertyOptions.IsKey)]
 108                 // LAMESPEC: MS lists no validator here but provides one in Properties.
 109                 public string Verb {
 110                         get { return (string) base[verbProp]; }
 111                         set { base[verbProp] = value; }
 112                 }
 113
 114                 protected override ConfigurationPropertyCollection Properties {
 115                         get { return _properties; }
 116                 }
 117
 118 #region CompatabilityCode
 119                 object instance;
 120                 Type type;
 121
 122                 string cached_verb = null;
 123                 string[] cached_verbs;
 124
 125                 string cached_path = null;
 126                 FileMatchingInfo[] cached_files;
 127
 128                 FileMatchingInfo[] SplitPaths ()
 129                 {
 130                         string [] paths = Path.Split (',');
 131                         cached_files = new FileMatchingInfo [paths.Length];
 132
 133                         int i = 0;
 134                         foreach (string s in paths)
 135                                 cached_files [i++] = new FileMatchingInfo (s);
 136
 137                         return cached_files;
 138                 }
 139
 140                 string[] SplitVerbs ()
 141                 {
 142                         if (Verb == "*")
 143                                 cached_verbs = null;
 144                         else
 145                                 cached_verbs = Verb.Split (',');
 146
 147                         return cached_verbs;
 148                 }
 149
 150                 internal string[] Verbs {
 151                         get {
 152                                 if (cached_verb != Verb) {
 153                                         cached_verbs = SplitVerbs();
 154                                         cached_verb = Verb;
 155                                 }
 156
 157                                 return cached_verbs;
 158                         }
 159                 }
 160
 161                 FileMatchingInfo[] Paths {
 162                         get {
 163                                 if (cached_path != Path) {
 164                                         cached_files = SplitPaths ();
 165                                         cached_path = Path;
 166                                 }
 167
 168                                 return cached_files;
 169                         }
 170                 }
 171
 172                 //
 173                 // Loads the a type by name and verifies that it implements
 174                 // IHttpHandler or IHttpHandlerFactory
 175                 //
 176                 internal static Type LoadType (string type_name)
 177                 {
 178                         Type t;
 179
 180                         try {
 181                                 t = System.Type.GetType (type_name, true);
 182                         } catch (Exception e) {
 183                                 throw new HttpException (String.Format ("Failed to load httpHandler type `{0}'", type_name));
 184                         }
 185
 186                         if (typeof (IHttpHandler).IsAssignableFrom (t) ||
 187                             typeof (IHttpHandlerFactory).IsAssignableFrom (t))
 188                                 return t;
 189
 190                         throw new HttpException (String.Format ("Type {0} does not implement IHttpHandler or IHttpHandlerFactory", type_name));
 191                 }
 192
 193                 internal bool PathMatches (string p)
 194                 {
 195                         int slash = p.LastIndexOf ('/');
 196                         string orig = p;
 197                         if (slash != -1)
 198                                 p = p.Substring (slash);
 199
 200                         for (int j = Paths.Length; j > 0; ){
 201                                 j--;
 202                                 FileMatchingInfo fm = Paths [j];
 203
 204                                 if (fm.MatchExact != null)
 205                                         return fm.MatchExact.Length == p.Length && StrUtils.EndsWith (p, fm.MatchExact);
 206
 207                                 if (fm.EndsWith != null)
 208                                         return StrUtils.EndsWith (p, fm.EndsWith);
 209
 210                                 if (fm.MatchExpr == "*")
 211                                         return true;
 212
 213                                 /* convert to regexp */
 214                                 return fm.RegExp.IsMatch (orig);
 215                         }
 216                         return false;
 217                 }
 218
 219                 // Loads the handler, possibly delay-loaded.
 220                 internal object GetHandlerInstance ()
 221                 {
 222                         IHttpHandler ihh = instance as IHttpHandler;
 223
 224                         if (instance == null || (ihh != null && !ihh.IsReusable)){
 225                                 if (type == null)
 226                                         type = LoadType (Type);
 227
 228                                 instance = Activator.CreateInstance (type);
 229                         }
 230
 231                         return instance;
 232                 }
 233
 234                 class FileMatchingInfo {
 235                         public string MatchExact;
 236                         public string MatchExpr;
 237
 238                         // If set, we can fast-path the patch with string.EndsWith (FMI.EndsWith)
 239                         public string EndsWith;
 240                         public Regex RegExp;
 241
 242                         public FileMatchingInfo (string s)
 243                         {
 244                                 MatchExpr = s;
 245
 246                                 if (s[0] == '*' && (s.IndexOf ('*', 1) == -1))
 247                                         EndsWith = s.Substring (1);
 248
 249                                 if (s.IndexOf ('*') == -1)
 250                                         MatchExact = "/" + s;
 251
 252                                 if (MatchExpr != "*") {
 253                                         string expr = MatchExpr.Replace(".", "\\.").Replace("?", "\\?").Replace("*", ".*");
 254                                         if (expr.Length > 0 && expr [0] =='/')
 255                                                 expr = expr.Substring (1);
 256
 257                                         expr += "\\z";
 258                                         RegExp = new Regex (expr);
 259                                 }
 260                         }
 261                 }
 262 #endregion
 263
 264         }
 265
 266 }
 267
 268 #endif