mcs/class/System.Web/System.Web.UI/TemplateParser.cs

   1 //
   2 // System.Web.UI.TemplateParser
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) 2002,2003 Ximian, Inc. (http://www.ximian.com)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31 using System;
  32 using System.CodeDom.Compiler;
  33 using System.Collections;
  34 using System.IO;
  35 using System.Reflection;
  36 using System.Web;
  37 using System.Web.Compilation;
  38 using System.Web.Configuration;
  39 using System.Web.Util;
  40
  41 namespace System.Web.UI
  42 {
  43         public abstract class TemplateParser : BaseParser
  44         {
  45                 string inputFile;
  46                 string text;
  47                 string privateBinPath;
  48                 Hashtable mainAttributes;
  49                 ArrayList dependencies;
  50                 ArrayList assemblies;
  51                 Hashtable anames;
  52                 ArrayList imports;
  53                 ArrayList interfaces;
  54                 ArrayList scripts;
  55                 Type baseType;
  56                 string className;
  57                 RootBuilder rootBuilder;
  58                 bool debug;
  59                 string compilerOptions;
  60                 string language;
  61                 bool strictOn = false;
  62                 bool explicitOn = false;
  63                 bool output_cache;
  64                 int oc_duration;
  65                 string oc_header, oc_custom, oc_param, oc_controls;
  66                 bool oc_shared;
  67                 OutputCacheLocation oc_location;
  68                 Assembly srcAssembly;
  69                 int appAssemblyIndex = -1;
  70
  71                 internal TemplateParser ()
  72                 {
  73                         imports = new ArrayList ();
  74                         imports.Add ("System");
  75                         imports.Add ("System.Collections");
  76                         imports.Add ("System.Collections.Specialized");
  77                         imports.Add ("System.Configuration");
  78                         imports.Add ("System.Text");
  79                         imports.Add ("System.Text.RegularExpressions");
  80                         imports.Add ("System.Web");
  81                         imports.Add ("System.Web.Caching");
  82                         imports.Add ("System.Web.Security");
  83                         imports.Add ("System.Web.SessionState");
  84                         imports.Add ("System.Web.UI");
  85                         imports.Add ("System.Web.UI.WebControls");
  86                         imports.Add ("System.Web.UI.HtmlControls");
  87
  88                         assemblies = new ArrayList ();
  89                         foreach (string a in CompilationConfig.Assemblies)
  90                                 AddAssemblyByName (a);
  91                         if (CompilationConfig.AssembliesInBin)
  92                                 AddAssembliesInBin ();
  93
  94                         language = CompilationConfig.DefaultLanguage;
  95                 }
  96
  97                 internal void AddApplicationAssembly ()
  98                 {
  99                         string location = Context.ApplicationInstance.AssemblyLocation;
 100                         if (location != typeof (TemplateParser).Assembly.Location) {
 101                                 appAssemblyIndex = assemblies.Add (location);
 102                         }
 103                 }
 104
 105                 protected abstract Type CompileIntoType ();
 106
 107                 internal virtual void HandleOptions (object obj)
 108                 {
 109                 }
 110
 111                 internal static string GetOneKey (Hashtable tbl)
 112                 {
 113                         foreach (object key in tbl.Keys)
 114                                 return key.ToString ();
 115
 116                         return null;
 117                 }
 118
 119                 internal virtual void AddDirective (string directive, Hashtable atts)
 120                 {
 121                         if (String.Compare (directive, DefaultDirectiveName, true) == 0) {
 122                                 if (mainAttributes != null)
 123                                         ThrowParseException ("Only 1 " + DefaultDirectiveName + " is allowed");
 124
 125                                 mainAttributes = atts;
 126                                 ProcessMainAttributes (mainAttributes);
 127                                 return;
 128                         }
 129
 130                         int cmp = String.Compare ("Assembly", directive, true);
 131                         if (cmp == 0) {
 132                                 string name = GetString (atts, "Name", null);
 133                                 string src = GetString (atts, "Src", null);
 134
 135                                 if (atts.Count > 0)
 136                                         ThrowParseException ("Attribute " + GetOneKey (atts) + " unknown.");
 137
 138                                 if (name == null && src == null)
 139                                         ThrowParseException ("You gotta specify Src or Name");
 140
 141                                 if (name != null && src != null)
 142                                         ThrowParseException ("Src and Name cannot be used together");
 143
 144                                 if (name != null) {
 145                                         AddAssemblyByName (name);
 146                                 } else {
 147                                         GetAssemblyFromSource (src);
 148                                 }
 149
 150                                 return;
 151                         }
 152
 153                         cmp = String.Compare ("Import", directive, true);
 154                         if (cmp == 0) {
 155                                 string namesp = GetString (atts, "Namespace", null);
 156                                 if (atts.Count > 0)
 157                                         ThrowParseException ("Attribute " + GetOneKey (atts) + " unknown.");
 158
 159                                 if (namesp != null && namesp != "")
 160                                         AddImport (namesp);
 161                                 return;
 162                         }
 163
 164                         cmp = String.Compare ("Implements", directive, true);
 165                         if (cmp == 0) {
 166                                 string ifacename = GetString (atts, "Interface", "");
 167
 168                                 if (atts.Count > 0)
 169                                         ThrowParseException ("Attribute " + GetOneKey (atts) + " unknown.");
 170
 171                                 Type iface = LoadType (ifacename);
 172                                 if (iface == null)
 173                                         ThrowParseException ("Cannot find type " + ifacename);
 174
 175                                 if (!iface.IsInterface)
 176                                         ThrowParseException (iface + " is not an interface");
 177
 178                                 AddInterface (iface.FullName);
 179                                 return;
 180                         }
 181
 182                         cmp = String.Compare ("OutputCache", directive, true);
 183                         if (cmp == 0) {
 184                                 output_cache = true;
 185
 186                                 if (atts ["Duration"] == null)
 187                                         ThrowParseException ("The directive is missing a 'duration' attribute.");
 188                                 if (atts ["VaryByParam"] == null)
 189                                         ThrowParseException ("This directive is missing a 'VaryByParam' " +
 190                                                         "attribute, which should be set to \"none\", \"*\", " +
 191                                                         "or a list of name/value pairs.");
 192
 193                                 foreach (DictionaryEntry entry in atts) {
 194                                         string key = (string) entry.Key;
 195                                         switch (key.ToLower ()) {
 196                                         case "duration":
 197                                                 oc_duration = Int32.Parse ((string) entry.Value);
 198                                                 if (oc_duration < 1)
 199                                                         ThrowParseException ("The 'duration' attribute must be set " +
 200                                                                         "to a positive integer value");
 201                                                 break;
 202                                         case "varybyparam":
 203                                                 oc_param = (string) entry.Value;
 204                                                 if (String.Compare (oc_param, "none") == 0)
 205                                                         oc_param = null;
 206                                                 break;
 207                                         case "varybyheader":
 208                                                 oc_header = (string) entry.Value;
 209                                                 break;
 210                                         case "varybycustom":
 211                                                 oc_custom = (string) entry.Value;
 212                                                 break;
 213                                         case "location":
 214                                                 if (!(this is PageParser))
 215                                                         goto default;
 216
 217                                                 try {
 218                                                         oc_location = (OutputCacheLocation) Enum.Parse (
 219                                                                 typeof (OutputCacheLocation), (string) entry.Value, true);
 220                                                 } catch {
 221                                                         ThrowParseException ("The 'location' attribute is case sensitive and " +
 222                                                                         "must be one of the following values: Any, Client, " +
 223                                                                         "Downstream, Server, None, ServerAndClient.");
 224                                                 }
 225                                                 break;
 226                                         case "varybycontrol":
 227                                                 if (this is PageParser)
 228                                                         goto default;
 229
 230                                                 oc_controls = (string) entry.Value;
 231                                                 break;
 232                                         case "shared":
 233                                                 if (this is PageParser)
 234                                                         goto default;
 235
 236                                                 try {
 237                                                         oc_shared = Boolean.Parse ((string) entry.Value);
 238                                                 } catch {
 239                                                         ThrowParseException ("The 'shared' attribute is case sensitive" +
 240                                                                         " and must be set to 'true' or 'false'.");
 241                                                 }
 242                                                 break;
 243                                         default:
 244                                                 ThrowParseException ("The '" + key + "' attribute is not " +
 245                                                                 "supported by the 'Outputcache' directive.");
 246                                                 break;
 247                                         }
 248
 249                                 }
 250
 251                                 return;
 252                         }
 253
 254                         ThrowParseException ("Unknown directive: " + directive);
 255                 }
 256
 257                 internal Type LoadType (string typeName)
 258                 {
 259                         // First try loaded assemblies, then try assemblies in Bin directory.
 260                         Type type = null;
 261                         bool seenBin = false;
 262                         Assembly [] assemblies = AppDomain.CurrentDomain.GetAssemblies ();
 263                         foreach (Assembly ass in assemblies) {
 264                                 type = ass.GetType (typeName);
 265                                 if (type == null)
 266                                         continue;
 267
 268                                 if (Path.GetDirectoryName (ass.Location) != PrivateBinPath) {
 269                                         AddAssembly (ass, true);
 270                                 } else {
 271                                         seenBin = true;
 272                                 }
 273
 274                                 AddDependency (ass.Location);
 275                                 return type;
 276                         }
 277
 278                         if (seenBin)
 279                                 return null;
 280
 281                         // Load from bin
 282                         if (!Directory.Exists (PrivateBinPath))
 283                                 return null;
 284
 285                         string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
 286                         foreach (string s in binDlls) {
 287                                 Assembly binA = Assembly.LoadFrom (s);
 288                                 type = binA.GetType (typeName);
 289                                 if (type == null)
 290                                         continue;
 291
 292                                 AddDependency (binA.Location);
 293                                 return type;
 294                         }
 295
 296                         return null;
 297                 }
 298
 299                 void AddAssembliesInBin ()
 300                 {
 301                         if (!Directory.Exists (PrivateBinPath))
 302                                 return;
 303
 304                         string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
 305                         foreach (string s in binDlls) {
 306                                 assemblies.Add (s);
 307                         }
 308                 }
 309
 310                 internal virtual void AddInterface (string iface)
 311                 {
 312                         if (interfaces == null)
 313                                 interfaces = new ArrayList ();
 314
 315                         if (!interfaces.Contains (iface))
 316                                 interfaces.Add (iface);
 317                 }
 318
 319                 internal virtual void AddImport (string namesp)
 320                 {
 321                         if (imports == null)
 322                                 imports = new ArrayList ();
 323
 324                         if (!imports.Contains (namesp))
 325                                 imports.Add (namesp);
 326                 }
 327
 328                 internal virtual void AddSourceDependency (string filename)
 329                 {
 330                         if (dependencies != null && dependencies.Contains (filename)) {
 331                                 ThrowParseException ("Circular file references are not allowed. File: " + filename);
 332                         }
 333
 334                         AddDependency (filename);
 335                 }
 336
 337                 internal virtual void AddDependency (string filename)
 338                 {
 339                         if (filename == "")
 340                                 return;
 341
 342                         if (dependencies == null)
 343                                 dependencies = new ArrayList ();
 344
 345                         if (!dependencies.Contains (filename))
 346                                 dependencies.Add (filename);
 347                 }
 348
 349                 internal virtual void AddAssembly (Assembly assembly, bool fullPath)
 350                 {
 351                         if (assembly.Location == "")
 352                                 return;
 353
 354                         if (anames == null)
 355                                 anames = new Hashtable ();
 356
 357                         string name = assembly.GetName ().Name;
 358                         string loc = assembly.Location;
 359                         if (fullPath) {
 360                                 if (!assemblies.Contains (loc)) {
 361                                         assemblies.Add (loc);
 362                                 }
 363
 364                                 anames [name] = loc;
 365                                 anames [loc] = assembly;
 366                         } else {
 367                                 if (!assemblies.Contains (name)) {
 368                                         assemblies.Add (name);
 369                                 }
 370
 371                                 anames [name] = assembly;
 372                         }
 373                 }
 374
 375                 internal virtual Assembly AddAssemblyByName (string name)
 376                 {
 377                         if (anames == null)
 378                                 anames = new Hashtable ();
 379
 380                         if (anames.Contains (name)) {
 381                                 object o = anames [name];
 382                                 if (o is string)
 383                                         o = anames [o];
 384
 385                                 return (Assembly) o;
 386                         }
 387
 388                         Assembly assembly = null;
 389                         try {
 390                                 assembly = Assembly.Load (name);
 391                         } catch (Exception) {
 392                                 try {
 393                                         assembly = Assembly.LoadWithPartialName (name);
 394                                 } catch (Exception e) {
 395                                         ThrowParseException ("Assembly " + name + " not found", e);
 396                                 }
 397
 398                                 if (assembly == null)
 399                                         ThrowParseException ("Assembly " + name + " not found", null);
 400                         }
 401
 402                         AddAssembly (assembly, true);
 403                         return assembly;
 404                 }
 405
 406                 internal virtual void ProcessMainAttributes (Hashtable atts)
 407                 {
 408                         atts.Remove ("Description"); // ignored
 409                         atts.Remove ("CodeBehind");  // ignored
 410                         atts.Remove ("AspCompat"); // ignored
 411
 412 #if NET_2_0
 413                         atts.Remove ("CodeFile"); // ignored
 414 #endif
 415
 416                         debug = GetBool (atts, "Debug", true);
 417                         compilerOptions = GetString (atts, "CompilerOptions", "");
 418                         language = GetString (atts, "Language", CompilationConfig.DefaultLanguage);
 419                         strictOn = GetBool (atts, "Strict", CompilationConfig.Strict);
 420                         explicitOn = GetBool (atts, "Explicit", CompilationConfig.Explicit);
 421                         string src = GetString (atts, "Src", null);
 422                         if (src != null)
 423                                 srcAssembly = GetAssemblyFromSource (src);
 424
 425                         string inherits = GetString (atts, "Inherits", null);
 426                         if (inherits != null)
 427                                 SetBaseType (inherits);
 428
 429                         className = GetString (atts, "ClassName", null);
 430                         if (className != null && !CodeGenerator.IsValidLanguageIndependentIdentifier (className))
 431                                 ThrowParseException (String.Format ("'{0}' is not valid for 'className'", className));
 432
 433                         if (atts.Count > 0)
 434                                 ThrowParseException ("Unknown attribute: " + GetOneKey (atts));
 435                 }
 436
 437                 internal void SetBaseType (string type)
 438                 {
 439                         if (type == DefaultBaseTypeName)
 440                                 return;
 441
 442                         Type parent = null;
 443                         if (srcAssembly != null)
 444                                 parent = srcAssembly.GetType (type);
 445
 446                         if (parent == null)
 447                                 parent = LoadType (type);
 448
 449                         if (parent == null)
 450                                 ThrowParseException ("Cannot find type " + type);
 451
 452                         if (!DefaultBaseType.IsAssignableFrom (parent))
 453                                 ThrowParseException ("The parent type does not derive from " + DefaultBaseType);
 454
 455                         baseType = parent;
 456                 }
 457
 458                 Assembly GetAssemblyFromSource (string vpath)
 459                 {
 460                         vpath = UrlUtils.Combine (BaseVirtualDir, vpath);
 461                         string realPath = MapPath (vpath, false);
 462                         if (!File.Exists (realPath))
 463                                 ThrowParseException ("File " + vpath + " not found");
 464
 465                         AddSourceDependency (realPath);
 466
 467                         CompilerResults result = CachingCompiler.Compile (language, realPath, realPath, assemblies);
 468                         if (result.NativeCompilerReturnValue != 0) {
 469                                 StreamReader reader = new StreamReader (realPath);
 470                                 throw new CompilationException (realPath, result.Errors, reader.ReadToEnd ());
 471                         }
 472
 473                         AddAssembly (result.CompiledAssembly, true);
 474                         return result.CompiledAssembly;
 475                 }
 476
 477                 internal abstract Type DefaultBaseType { get; }
 478                 internal abstract string DefaultBaseTypeName { get; }
 479                 internal abstract string DefaultDirectiveName { get; }
 480
 481                 internal string InputFile
 482                 {
 483                         get { return inputFile; }
 484                         set { inputFile = value; }
 485                 }
 486
 487                 internal string Text
 488                 {
 489                         get { return text; }
 490                         set { text = value; }
 491                 }
 492
 493                 internal Type BaseType
 494                 {
 495                         get {
 496                                 if (baseType == null)
 497                                         baseType = DefaultBaseType;
 498
 499                                 return baseType;
 500                         }
 501                 }
 502
 503                 internal string ClassName {
 504                         get {
 505                                 if (className != null)
 506                                         return className;
 507
 508                                 className = Path.GetFileName (inputFile).Replace ('.', '_');
 509                                 className = className.Replace ('-', '_');
 510                                 className = className.Replace (' ', '_');
 511
 512                                 if (Char.IsDigit(className[0])) {
 513                                         className = "_" + className;
 514                                 }
 515
 516                                 return className;
 517                         }
 518                 }
 519
 520                 internal string PrivateBinPath {
 521                         get {
 522                                 if (privateBinPath != null)
 523                                         return privateBinPath;
 524
 525                                 AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
 526                                 privateBinPath = Path.Combine (setup.ApplicationBase, setup.PrivateBinPath);
 527
 528                                 return privateBinPath;
 529                         }
 530                 }
 531
 532                 internal ArrayList Scripts {
 533                         get {
 534                                 if (scripts == null)
 535                                         scripts = new ArrayList ();
 536
 537                                 return scripts;
 538                         }
 539                 }
 540
 541                 internal ArrayList Imports {
 542                         get { return imports; }
 543                 }
 544
 545                 internal ArrayList Assemblies {
 546                         get {
 547                                 if (appAssemblyIndex != -1) {
 548                                         object o = assemblies [appAssemblyIndex];
 549                                         assemblies.RemoveAt (appAssemblyIndex);
 550                                         assemblies.Add (o);
 551                                         appAssemblyIndex = -1;
 552                                 }
 553
 554                                 return assemblies;
 555                         }
 556                 }
 557
 558                 internal ArrayList Interfaces {
 559                         get { return interfaces; }
 560                 }
 561
 562                 internal RootBuilder RootBuilder {
 563                         get { return rootBuilder; }
 564                         set { rootBuilder = value; }
 565                 }
 566
 567                 internal ArrayList Dependencies {
 568                         get { return dependencies; }
 569                         set { dependencies = value; }
 570                 }
 571
 572                 internal string CompilerOptions {
 573                         get { return compilerOptions; }
 574                 }
 575
 576                 internal string Language {
 577                         get { return language; }
 578                 }
 579
 580                 internal bool StrictOn {
 581                         get { return strictOn; }
 582                 }
 583
 584                 internal bool ExplicitOn {
 585                         get { return explicitOn; }
 586                 }
 587
 588                 internal bool Debug {
 589                         get { return debug; }
 590                 }
 591
 592                 internal bool OutputCache {
 593                         get { return output_cache; }
 594                 }
 595
 596                 internal int OutputCacheDuration {
 597                         get { return oc_duration; }
 598                 }
 599
 600                 internal string OutputCacheVaryByHeader {
 601                         get { return oc_header; }
 602                 }
 603
 604                 internal string OutputCacheVaryByCustom {
 605                         get { return oc_custom; }
 606                 }
 607
 608                 internal string OutputCacheVaryByControls {
 609                         get { return oc_controls; }
 610                 }
 611
 612                 internal bool OutputCacheShared {
 613                         get { return oc_shared; }
 614                 }
 615
 616                 internal OutputCacheLocation OutputCacheLocation {
 617                         get { return oc_location; }
 618                 }
 619
 620                 internal string OutputCacheVaryByParam {
 621                         get { return oc_param; }
 622                 }
 623
 624                 internal PagesConfiguration PagesConfig {
 625                         get { return PagesConfiguration.GetInstance (Context); }
 626                 }
 627         }
 628 }
 629