mcs/class/System.Web/System.Web/CapabilitiesLoader.cs

   1 //
   2 // System.Web.CapabilitiesLoader
   3 //
   4 // Loads data from browscap.ini file provided by Gary J. Keith from
   5 // http://www.GaryKeith.com/browsers. Please don't abuse the
   6 // site when updating browscap.ini file. Use the update-browscap.exe tool.
   7 //
   8 // Authors:
   9 //   Gonzalo Paniagua Javier (gonzalo@ximian.com)
  10 //
  11 // (c) 2003 Novell, Inc. (http://www.novell.com)
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Collections;
  37 using System.Collections.Specialized;
  38 using System.Globalization;
  39 using System.IO;
  40 using System.Text.RegularExpressions;
  41 using System.Web.Configuration;
  42 using System.Web.Util;
  43
  44 namespace System.Web
  45 {
  46         sealed class BrowserData
  47         {
  48                 static char [] wildchars = new char [] {'*', '?'};
  49
  50                 object this_lock = new object ();
  51                 BrowserData parent;
  52                 string text;
  53                 string pattern;
  54 #if TARGET_JVM
  55                 java.util.regex.Pattern regex;
  56 #else
  57                 Regex regex;
  58 #endif
  59                 ListDictionary data;
  60
  61                 public BrowserData (string pattern)
  62                 {
  63                         int norx = pattern.IndexOfAny (wildchars);
  64                         if (norx == -1) {
  65                                 text = pattern;
  66                         } else {
  67                                 this.pattern = pattern.Substring (norx);
  68                                 text = pattern.Substring (0, norx);
  69                                 if (text.Length == 0)
  70                                         text = null;
  71
  72                                 this.pattern = this.pattern.Replace (".", "\\.");
  73                                 this.pattern = this.pattern.Replace ("(", "\\(");
  74                                 this.pattern = this.pattern.Replace (")", "\\)");
  75                                 this.pattern = this.pattern.Replace ("[", "\\[");
  76                                 this.pattern = this.pattern.Replace ("]", "\\]");
  77                                 this.pattern = this.pattern.Replace ('?', '.');
  78                                 this.pattern = this.pattern.Replace ("*", ".*");
  79                         }
  80                 }
  81
  82                 public BrowserData Parent {
  83                         get { return parent; }
  84                         set { parent = value; }
  85                 }
  86
  87                 public void Add (string key, string value)
  88                 {
  89                         if (data == null)
  90                                 data = new ListDictionary ();
  91
  92                         data.Add (key, value);
  93                 }
  94
  95                 public Hashtable GetProperties (Hashtable tbl)
  96                 {
  97                         if (parent != null)
  98                                 parent.GetProperties (tbl);
  99
 100                         if (data ["browser"] != null) { // Last one (most derived) will win.
 101                                 tbl ["browser"] = data ["browser"];
 102                         } else if (tbl ["browser"] == null) { // If none so far defined value set to *
 103                                 tbl ["browser"] = "*";
 104                         }
 105
 106                         if (!tbl.ContainsKey ("browsers")) {
 107                                 tbl ["browsers"] = new ArrayList ();
 108                         }
 109
 110                         ((ArrayList) tbl ["browsers"]).Add (tbl["browser"]);
 111
 112                         foreach (string key in data.Keys)
 113                                 tbl [key.ToLower (Helpers.InvariantCulture).Trim ()] = data [key];
 114
 115                         return tbl;
 116                 }
 117
 118                 public string GetParentName ()
 119                 {
 120                         return (string)(data.Contains("parent")? data ["parent"] : null);
 121                 }
 122
 123                 public string GetAlternateBrowser ()
 124                 {
 125                         return (pattern == null) ? text : null;
 126                 }
 127
 128                 public string GetBrowser ()
 129                 {
 130                         if (pattern == null)
 131                                 return text;
 132
 133                         return (string) data ["browser"];
 134                 }
 135
 136                 public bool IsMatch (string expression)
 137                 {
 138                         if (expression == null || expression.Length == 0)
 139                                 return false;
 140
 141                         if (text != null) {
 142                                 if (text [0] != expression [0] ||
 143                                     String.Compare (text, 1, expression, 1,
 144                                                     text.Length - 1, false,
 145                                                     Helpers.InvariantCulture) != 0) {
 146                                         return false;
 147                                 }
 148                                 expression = expression.Substring (text.Length);
 149                         }
 150
 151                         if (pattern == null)
 152                                 return expression.Length == 0;
 153
 154                         lock (this_lock) {
 155                                 if (regex == null)
 156 #if TARGET_JVM
 157                                         regex = java.util.regex.Pattern.compile (pattern);
 158 #else
 159                                 regex = new Regex (pattern);
 160 #endif
 161                         }
 162 #if TARGET_JVM
 163                         return regex.matcher ((java.lang.CharSequence) (object) expression).matches ();
 164 #else
 165                         return regex.Match (expression).Success;
 166 #endif
 167                 }
 168         }
 169
 170         sealed class CapabilitiesLoader : MarshalByRefObject
 171         {
 172                 const int userAgentsCacheSize = 3000;
 173                 static Hashtable defaultCaps;
 174                 static readonly object lockobj = new object ();
 175
 176 #if TARGET_JVM
 177                 static bool loaded {
 178                         get {
 179                                 return alldata != null;
 180                         }
 181                         set {
 182                                 if (alldata == null)
 183                                         alldata = new ArrayList ();
 184                         }
 185                 }
 186
 187                 const string alldataKey = "System.Web.CapabilitiesLoader.alldata";
 188                 static ICollection alldata {
 189                         get {
 190                                 return (ICollection) AppDomain.CurrentDomain.GetData (alldataKey);
 191                         }
 192                         set {
 193                                 AppDomain.CurrentDomain.SetData (alldataKey, value);
 194                         }
 195                 }
 196
 197                 const string userAgentsCacheKey = "System.Web.CapabilitiesLoader.userAgentsCache";
 198                 static Hashtable userAgentsCache {
 199                         get {
 200                                 lock (typeof (CapabilitiesLoader)) {
 201                                         Hashtable agentsCache = (Hashtable) AppDomain.CurrentDomain.GetData (userAgentsCacheKey);
 202                                         if (agentsCache == null) {
 203                                                 agentsCache = Hashtable.Synchronized (new Hashtable (userAgentsCacheSize + 10));
 204                                                 AppDomain.CurrentDomain.SetData (userAgentsCacheKey, agentsCache);
 205                                         }
 206
 207                                         return agentsCache;
 208                                 }
 209                         }
 210                 }
 211 #else
 212                 static volatile bool loaded;
 213                 static ICollection alldata;
 214                 static Hashtable userAgentsCache = Hashtable.Synchronized(new Hashtable(userAgentsCacheSize+10));
 215 #endif
 216
 217                 CapabilitiesLoader () {}
 218
 219                 static CapabilitiesLoader ()
 220                 {
 221                         defaultCaps = new Hashtable ();
 222                         defaultCaps.Add ("activexcontrols", "False");
 223                         defaultCaps.Add ("alpha", "False");
 224                         defaultCaps.Add ("aol", "False");
 225                         defaultCaps.Add ("aolversion", "0");
 226                         defaultCaps.Add ("authenticodeupdate", "");
 227                         defaultCaps.Add ("backgroundsounds", "False");
 228                         defaultCaps.Add ("beta", "False");
 229                         defaultCaps.Add ("browser", "*");
 230                         defaultCaps.Add ("browsers", new ArrayList ());
 231                         defaultCaps.Add ("cdf", "False");
 232                         defaultCaps.Add ("clrversion", "0");
 233                         defaultCaps.Add ("cookies", "False");
 234                         defaultCaps.Add ("crawler", "False");
 235                         defaultCaps.Add ("css", "0");
 236                         defaultCaps.Add ("cssversion", "0");
 237                         defaultCaps.Add ("ecmascriptversion", "0.0");
 238                         defaultCaps.Add ("frames", "False");
 239                         defaultCaps.Add ("iframes", "False");
 240                         defaultCaps.Add ("isbanned", "False");
 241                         defaultCaps.Add ("ismobiledevice", "False");
 242                         defaultCaps.Add ("issyndicationreader", "False");
 243                         defaultCaps.Add ("javaapplets", "False");
 244                         defaultCaps.Add ("javascript", "False");
 245                         defaultCaps.Add ("majorver", "0");
 246                         defaultCaps.Add ("minorver", "0");
 247                         defaultCaps.Add ("msdomversion", "0.0");
 248                         defaultCaps.Add ("netclr", "False");
 249                         defaultCaps.Add ("platform", "unknown");
 250                         defaultCaps.Add ("stripper", "False");
 251                         defaultCaps.Add ("supportscss", "False");
 252                         defaultCaps.Add ("tables", "False");
 253                         defaultCaps.Add ("vbscript", "False");
 254                         defaultCaps.Add ("version", "0");
 255                         defaultCaps.Add ("w3cdomversion", "0.0");
 256                         defaultCaps.Add ("wap", "False");
 257                         defaultCaps.Add ("win16", "False");
 258                         defaultCaps.Add ("win32", "False");
 259                         defaultCaps.Add ("win64", "False");
 260
 261 #if NET_2_0
 262                         defaultCaps.Add ("adapters", new Hashtable ());
 263                         defaultCaps.Add ("cancombineformsindeck", "False");
 264                         defaultCaps.Add ("caninitiatevoicecall", "False");
 265                         defaultCaps.Add ("canrenderafterinputorselectelement", "False");
 266                         defaultCaps.Add ("canrenderemptyselects", "False");
 267                         defaultCaps.Add ("canrenderinputandselectelementstogether", "False");
 268                         defaultCaps.Add ("canrendermixedselects", "False");
 269                         defaultCaps.Add ("canrenderoneventandprevelementstogether", "False");
 270                         defaultCaps.Add ("canrenderpostbackcards", "False");
 271                         defaultCaps.Add ("canrendersetvarzerowithmultiselectionlist", "False");
 272                         defaultCaps.Add ("cansendmail", "False");
 273                         defaultCaps.Add ("defaultsubmitbuttonlimit", "0");
 274                         defaultCaps.Add ("gatewayminorversion", "0");
 275                         defaultCaps.Add ("gatewaymajorversion", "0");
 276                         defaultCaps.Add ("gatewayversion", "None");
 277                         defaultCaps.Add ("hasbackbutton", "True");
 278                         defaultCaps.Add ("hidesrightalignedmultiselectscrollbars", "False");
 279                         defaultCaps.Add ("inputtype", "telephoneKeypad");
 280                         defaultCaps.Add ("iscolor", "False");
 281                         defaultCaps.Add ("jscriptversion", "0.0");
 282                         defaultCaps.Add ("maximumhreflength", "0");
 283                         defaultCaps.Add ("maximumrenderedpagesize", "2000");
 284                         defaultCaps.Add ("maximumsoftkeylabellength", "5");
 285                         defaultCaps.Add ("minorversionstring", "0.0");
 286                         defaultCaps.Add ("mobiledevicemanufacturer", "Unknown");
 287                         defaultCaps.Add ("mobiledevicemodel", "Unknown");
 288                         defaultCaps.Add ("numberofsoftkeys", "0");
 289                         defaultCaps.Add ("preferredimagemime", "image/gif");
 290                         defaultCaps.Add ("preferredrenderingmime", "text/html");
 291                         defaultCaps.Add ("preferredrenderingtype", "html32");
 292                         defaultCaps.Add ("preferredrequestencoding", "");
 293                         defaultCaps.Add ("preferredresponseencoding", "");
 294                         defaultCaps.Add ("rendersbreakbeforewmlselectandinput", "False");
 295                         defaultCaps.Add ("rendersbreaksafterhtmllists", "True");
 296                         defaultCaps.Add ("rendersbreaksafterwmlanchor", "False");
 297                         defaultCaps.Add ("rendersbreaksafterwmlinput", "False");
 298                         defaultCaps.Add ("renderswmldoacceptsinline", "True");
 299                         defaultCaps.Add ("renderswmlselectsasmenucards", "False");
 300                         defaultCaps.Add ("requiredmetatagnamevalue", "");
 301                         defaultCaps.Add ("requiresattributecolonsubstitution", "False");
 302                         defaultCaps.Add ("requirescontenttypemetatag", "False");
 303                         defaultCaps.Add ("requirescontrolstateinsession", "False");
 304                         defaultCaps.Add ("requiresdbcscharacter", "False");
 305                         defaultCaps.Add ("requireshtmladaptiveerrorreporting", "False");
 306                         defaultCaps.Add ("requiresleadingpagebreak", "False");
 307                         defaultCaps.Add ("requiresnobreakinformatting", "False");
 308                         defaultCaps.Add ("requiresoutputoptimization", "False");
 309                         defaultCaps.Add ("requiresphonenumbersasplaintext", "False");
 310                         defaultCaps.Add ("requiresspecialviewstateencoding", "False");
 311                         defaultCaps.Add ("requiresuniquefilepathsuffix", "False");
 312                         defaultCaps.Add ("requiresuniquehtmlcheckboxnames", "False");
 313                         defaultCaps.Add ("requiresuniquehtmlinputnames", "False");
 314                         defaultCaps.Add ("requiresurlencodedpostfieldvalues", "False");
 315                         defaultCaps.Add ("screenbitdepth", "1");
 316                         defaultCaps.Add ("screencharactersheight", "6");
 317                         defaultCaps.Add ("screencharacterswidth", "12");
 318                         defaultCaps.Add ("screenpixelsheight", "72");
 319                         defaultCaps.Add ("screenpixelswidth", "96");
 320                         defaultCaps.Add ("supportsaccesskeyattribute", "False");
 321                         defaultCaps.Add ("supportsbodycolor", "True");
 322                         defaultCaps.Add ("supportsbold", "False");
 323                         defaultCaps.Add ("supportscachecontrolmetatag", "True");
 324                         defaultCaps.Add ("supportscallback", "False");
 325                         defaultCaps.Add ("supportsdivalign", "True");
 326                         defaultCaps.Add ("supportsdivnowrap", "False");
 327                         defaultCaps.Add ("supportsemptystringincookievalue", "False");
 328                         defaultCaps.Add ("supportsfontcolor", "True");
 329                         defaultCaps.Add ("supportsfontname", "False");
 330                         defaultCaps.Add ("supportsfontsize", "False");
 331                         defaultCaps.Add ("supportsimagesubmit", "False");
 332                         defaultCaps.Add ("supportsimodesymbols", "False");
 333                         defaultCaps.Add ("supportsinputistyle", "False");
 334                         defaultCaps.Add ("supportsinputmode", "False");
 335                         defaultCaps.Add ("supportsitalic", "False");
 336                         defaultCaps.Add ("supportsjphonemultimediaattributes", "False");
 337                         defaultCaps.Add ("supportsjphonesymbols", "False");
 338                         defaultCaps.Add ("supportsquerystringinformaction", "True");
 339                         defaultCaps.Add ("supportsredirectwithcookie", "True");
 340                         defaultCaps.Add ("supportsselectmultiple", "True");
 341                         defaultCaps.Add ("supportsuncheck", "True");
 342                         defaultCaps.Add ("supportsxmlhttp", "False");
 343                         defaultCaps.Add ("type", "Unknown");
 344 #endif
 345                 }
 346
 347                 public static Hashtable GetCapabilities (string userAgent)
 348                 {
 349                         Init ();
 350                         if (userAgent != null)
 351                                 userAgent = userAgent.Trim ();
 352
 353                         if (alldata == null || userAgent == null || userAgent.Length == 0)
 354                                 return defaultCaps;
 355
 356                         Hashtable userBrowserCaps = (Hashtable) (userAgentsCache.Contains(userAgent)? userAgentsCache [userAgent] : null);
 357                         if (userBrowserCaps == null) {
 358                                 foreach (BrowserData bd in alldata) {
 359                                         if (bd.IsMatch (userAgent)) {
 360                                                 Hashtable tbl;
 361                                                 tbl = new Hashtable (defaultCaps);
 362                                                 userBrowserCaps = bd.GetProperties (tbl);
 363                                                 break;
 364                                         }
 365                                 }
 366
 367                                 if (userBrowserCaps == null)
 368                                         userBrowserCaps = defaultCaps;
 369
 370                                 lock (lockobj) {
 371                                         if (userAgentsCache.Count >= userAgentsCacheSize)
 372                                                 userAgentsCache.Clear ();
 373                                 }
 374                                 userAgentsCache [userAgent] = userBrowserCaps;
 375                         }
 376                         return userBrowserCaps;
 377                 }
 378
 379                 static void Init ()
 380                 {
 381                         if (loaded)
 382                                 return;
 383
 384                         lock (lockobj) {
 385                                 if (loaded)
 386                                         return;
 387 #if TARGET_J2EE
 388                                 string filepath = "browscap.ini";
 389 #else
 390                                 string dir = HttpRuntime.MachineConfigurationDirectory;
 391                                 string filepath = Path.Combine (dir, "browscap.ini");
 392                                 if (!File.Exists (filepath)) {
 393                                         // try removing the trailing version directory
 394                                         dir = Path.GetDirectoryName (dir);
 395                                         filepath = Path.Combine (dir, "browscap.ini");
 396                                 }
 397 #endif
 398                                 try {
 399                                         LoadFile (filepath);
 400                                 } catch (Exception) {}
 401
 402                                 loaded = true;
 403                         }
 404                 }
 405
 406 #if TARGET_J2EE
 407                 static TextReader GetJavaTextReader(string filename)
 408                 {
 409                         try
 410                         {
 411                                 java.lang.ClassLoader cl = (java.lang.ClassLoader)
 412                                         AppDomain.CurrentDomain.GetData("GH_ContextClassLoader");
 413                                 if (cl == null)
 414                                         return null;
 415
 416                                 string custom = String.Concat("browscap/", filename);
 417
 418                                 java.io.InputStream inputStream = cl.getResourceAsStream(custom);
 419                                 if (inputStream == null)
 420                                         inputStream = cl.getResourceAsStream(filename);
 421
 422                                 if (inputStream == null)
 423                                         return null;
 424
 425                                 return new StreamReader (new System.Web.J2EE.J2EEUtils.InputStreamWrapper (inputStream));
 426                         }
 427                         catch (Exception e)
 428                         {
 429                                 return null;
 430                         }
 431                 }
 432 #endif
 433
 434                 static void LoadFile (string filename)
 435                 {
 436 #if TARGET_J2EE
 437                         TextReader input = GetJavaTextReader(filename);
 438                         if(input == null)
 439                                 return;
 440 #else
 441                         if (!File.Exists (filename))
 442                                 return;
 443
 444                         TextReader input = new StreamReader (File.OpenRead (filename));
 445 #endif
 446                         using (input) {
 447                         string str;
 448                         Hashtable allhash = new Hashtable ();
 449                         int aux = 0;
 450                         ArrayList browserData = new ArrayList ();
 451                         while ((str = input.ReadLine ()) != null) {
 452                                 if (str.Length == 0 || str [0] == ';')
 453                                         continue;
 454
 455                                 string userAgent = str.Substring (1, str.Length - 2);
 456                                 BrowserData data = new BrowserData (userAgent);
 457                                 ReadCapabilities (input, data);
 458
 459                                 /* Ignore default browser and file version information */
 460                                 if (userAgent == "*" || userAgent == "GJK_Browscap_Version")
 461                                         continue;
 462
 463                                 string key = data.GetBrowser ();
 464                                 if (key == null || allhash.ContainsKey (key)) {
 465                                         allhash.Add (aux++, data);
 466                                         browserData.Add (data);
 467                                 } else {
 468                                         allhash.Add (key, data);
 469                                         browserData.Add (data);
 470                                 }
 471                         }
 472
 473                         alldata = browserData;
 474                         foreach (BrowserData data in alldata) {
 475                                 string pname = data.GetParentName ();
 476                                 if (pname == null)
 477                                         continue;
 478
 479                                 data.Parent = (BrowserData) allhash [pname];
 480                         }
 481                         }
 482                 }
 483
 484                 static char [] eq = new char []{'='};
 485                 static void ReadCapabilities (TextReader input, BrowserData data)
 486                 {
 487                         string str, key;
 488                         string [] keyvalue;
 489
 490                         while ((str = input.ReadLine ()) != null && str.Length != 0) {
 491                                 keyvalue = str.Split (eq, 2);
 492                                 key = keyvalue [0].ToLower (Helpers.InvariantCulture).Trim ();
 493                                 if (key.Length == 0)
 494                                         continue;
 495                                 data.Add (key, keyvalue [1]);
 496                         }
 497                 }
 498         }
 499 }