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

   1 //
   2 // System.Web.UI.SimpleWebHandlerParser
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2002,2003 Ximian, Inc (http://www.ximian.com)
   8 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.CodeDom.Compiler;
  31 using System.Collections;
  32 using System.IO;
  33 using System.Reflection;
  34 using System.Security.Permissions;
  35 using System.Text;
  36 using System.Web.Compilation;
  37 using System.Web.Configuration;
  38 using System.Web.Util;
  39
  40 namespace System.Web.UI
  41 {
  42         // CAS
  43         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  44         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  45         public abstract class SimpleWebHandlerParser
  46         {
  47                 HttpContext context;
  48                 string vPath;
  49                 string physPath;
  50                 string className;
  51                 bool debug;
  52                 string language;
  53                 string program;
  54                 bool gotDefault;
  55                 ArrayList assemblies;
  56                 ArrayList dependencies;
  57                 Hashtable anames;
  58                 string privateBinPath;
  59                 string baseDir;
  60                 string baseVDir;
  61 #if !NET_2_0
  62                 CompilationConfiguration compilationConfig;
  63 #else
  64                 TextReader reader;
  65 #endif
  66                 int appAssemblyIndex = -1;
  67                 Type cachedType;
  68
  69                 protected SimpleWebHandlerParser (HttpContext context, string virtualPath, string physicalPath)
  70                 {
  71                         cachedType = CachingCompiler.GetTypeFromCache (physicalPath);
  72                         if (cachedType != null)
  73                                 return; // We don't need anything else.
  74
  75                         this.context = context;
  76                         this.vPath = virtualPath;
  77                         this.physPath = physicalPath;
  78                         AddDependency (physicalPath);
  79
  80                         assemblies = new ArrayList ();
  81                         string location = Context.ApplicationInstance.AssemblyLocation;
  82                         if (location != typeof (TemplateParser).Assembly.Location)
  83                                 appAssemblyIndex = assemblies.Add (location);
  84
  85 #if NET_2_0
  86                         bool addAssembliesInBin = false;
  87                         foreach (AssemblyInfo info in CompilationConfig.Assemblies) {
  88                                 if (info.Assembly == "*")
  89                                         addAssembliesInBin = true;
  90                                 else
  91                                         AddAssemblyByName (info.Assembly, null);
  92                         }
  93                         if (addAssembliesInBin)
  94                                 AddAssembliesInBin ();
  95 #else
  96                         assemblies.AddRange (CompilationConfig.Assemblies);
  97                         if (CompilationConfig.AssembliesInBin)
  98                                 AddAssembliesInBin ();
  99 #endif
 100
 101                         language = CompilationConfig.DefaultLanguage;
 102
 103                         GetDirectivesAndContent ();
 104                 }
 105 #if NET_2_0
 106                 internal SimpleWebHandlerParser (HttpContext context, string virtualPath, string physicalPath, TextReader reader)
 107                         : this (context, virtualPath, physicalPath)
 108                 {
 109                         this.reader = reader;
 110                 }
 111 #endif
 112
 113                 protected Type GetCompiledTypeFromCache ()
 114                 {
 115                         return cachedType;
 116                 }
 117
 118                 void GetDirectivesAndContent ()
 119                 {
 120                         string line;
 121                         bool directiveFound = false;
 122                         StringBuilder content = new StringBuilder ();
 123                         using (StreamReader reader = new StreamReader (File.OpenRead (physPath))) {
 124                                 while ((line = reader.ReadLine ()) != null && cachedType == null) {
 125                                         string trimmed = line.Trim ();
 126                                         if (!directiveFound && trimmed == String.Empty)
 127                                                 continue;
 128
 129                                         if (trimmed.StartsWith ("<")) {
 130                                                 ParseDirective (trimmed);
 131                                                 directiveFound = true;
 132                                                 if (gotDefault) {
 133                                                         cachedType = CachingCompiler.GetTypeFromCache (physPath);
 134                                                         if (cachedType != null)
 135                                                                 break;
 136                                                 }
 137
 138                                                 continue;
 139                                         }
 140
 141                                         content.Append (line + "\n");
 142                                         content.Append (reader.ReadToEnd ());
 143                                 }
 144                         }
 145
 146                         if (!gotDefault)
 147                                 throw new ParseException (null, "No @" + DefaultDirectiveName +
 148                                                         " directive found");
 149
 150                         if (cachedType == null)
 151                                 this.program = content.ToString ();
 152                 }
 153
 154                 void TagParsed (ILocation location, System.Web.Compilation.TagType tagtype, string tagid, TagAttributes attributes)
 155                 {
 156                         if (tagtype != System.Web.Compilation.TagType.Directive)
 157                                 throw new ParseException (location, "Unexpected tag");
 158
 159                         if (String.Compare (tagid, DefaultDirectiveName, true) == 0) {
 160                                 AddDefaultDirective (location, attributes);
 161                         } else if (String.Compare (tagid, "Assembly", true) == 0) {
 162                                 AddAssemblyDirective (location, attributes);
 163                         } else {
 164                                 throw new ParseException (location, "Unexpected directive: " + tagid);
 165                         }
 166                 }
 167
 168                 void TextParsed (ILocation location, string text)
 169                 {
 170                         if (text.Trim () != "")
 171                                 throw new ParseException (location, "Text not allowed here");
 172                 }
 173
 174                 void ParseError (ILocation location, string message)
 175                 {
 176                         throw new ParseException (location, message);
 177                 }
 178
 179                 static string GetAndRemove (Hashtable table, string key)
 180                 {
 181                         string o = table [key] as string;
 182                         table.Remove (key);
 183                         return o;
 184                 }
 185
 186                 void ParseDirective (string line)
 187                 {
 188                         AspParser parser = new AspParser (physPath, new StringReader (line));
 189                         parser.Error += new ParseErrorHandler (ParseError);
 190                         parser.TagParsed += new TagParsedHandler (TagParsed);
 191                         parser.TextParsed += new TextParsedHandler (TextParsed);
 192
 193                         parser.Parse ();
 194                 }
 195
 196                 internal virtual void AddDefaultDirective (ILocation location, TagAttributes attrs)
 197                 {
 198                         if (gotDefault)
 199                                 throw new ParseException (location, "duplicate " + DefaultDirectiveName + " directive");
 200
 201                         gotDefault = true;
 202                         Hashtable attributes = attrs.GetDictionary (null);
 203                         className = GetAndRemove (attributes, "class");
 204                         if (className == null)
 205                                 throw new ParseException (null, "No Class attribute found.");
 206
 207                         string d = GetAndRemove (attributes, "debug");
 208                         if (d != null) {
 209                                 debug = (String.Compare (d, "true", true) == 0);
 210                                 if (debug == false && String.Compare (d, "false", true) != 0)
 211                                         throw new ParseException (null, "Invalid value for Debug attribute");
 212                         }
 213
 214                         language = GetAndRemove (attributes, "language");
 215                         if (language == null)
 216                                 language = CompilationConfig.DefaultLanguage;
 217
 218                         GetAndRemove (attributes, "codebehind");
 219                         if (attributes.Count > 0)
 220                                 throw new ParseException (location, "Unrecognized attribute in " +
 221                                                           DefaultDirectiveName + " directive");
 222                 }
 223
 224                 internal virtual void AddAssemblyDirective (ILocation location, TagAttributes attrs)
 225                 {
 226                         Hashtable tbl = attrs.GetDictionary (null);
 227                         string name = GetAndRemove (tbl, "Name");
 228                         string src = GetAndRemove (tbl, "Src");
 229                         if (name == null && src == null)
 230                                 throw new ParseException (location, "You gotta specify Src or Name");
 231
 232                         if (name != null && src != null)
 233                                 throw new ParseException (location, "Src and Name cannot be used together");
 234
 235                         if (name != null) {
 236                                 AddAssemblyByName (name, location);
 237                         } else {
 238                                 GetAssemblyFromSource (src, location);
 239                         }
 240
 241                         if (tbl.Count > 0)
 242                                 throw new ParseException (location, "Unrecognized attribute in Assembly directive");
 243                 }
 244
 245                 internal virtual void AddAssembly (Assembly assembly, bool fullPath)
 246                 {
 247                         if (anames == null)
 248                                 anames = new Hashtable ();
 249
 250                         string name = assembly.GetName ().Name;
 251                         string loc = assembly.Location;
 252                         if (fullPath) {
 253                                 if (!assemblies.Contains (loc)) {
 254                                         assemblies.Add (loc);
 255                                 }
 256
 257                                 anames [name] = loc;
 258                                 anames [loc] = assembly;
 259                         } else {
 260                                 if (!assemblies.Contains (name)) {
 261                                         assemblies.Add (name);
 262                                 }
 263
 264                                 anames [name] = assembly;
 265                         }
 266                 }
 267
 268                 internal virtual Assembly AddAssemblyByName (string name, ILocation location)
 269                 {
 270                         if (anames == null)
 271                                 anames = new Hashtable ();
 272
 273                         if (anames.Contains (name)) {
 274                                 object o = anames [name];
 275                                 if (o is string)
 276                                         o = anames [o];
 277
 278                                 return (Assembly) o;
 279                         }
 280
 281                         Assembly assembly = LoadAssemblyFromBin (name);
 282                         if (assembly != null) {
 283                                 AddAssembly (assembly, true);
 284                                 return assembly;
 285                         }
 286
 287                         try {
 288                                 assembly = Assembly.LoadWithPartialName (name);
 289                         } catch (Exception e) {
 290                                 throw new ParseException (location, "Assembly " + name + " not found", e);
 291                         }
 292
 293                         AddAssembly (assembly, true);
 294                         return assembly;
 295                 }
 296
 297                 void AddAssembliesInBin ()
 298                 {
 299                         if (!Directory.Exists (PrivateBinPath))
 300                                 return;
 301
 302                         string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
 303                         foreach (string dll in binDlls) {
 304                                 try {
 305                                         Assembly assembly = Assembly.LoadFrom (dll);
 306                                         AddAssembly (assembly, true);
 307                                 } catch (Exception e) {
 308                                         throw new Exception ("Error while loading " + dll, e);
 309                                 }
 310                         }
 311                 }
 312
 313                 Assembly LoadAssemblyFromBin (string name)
 314                 {
 315                         Assembly assembly;
 316                         if (!Directory.Exists (PrivateBinPath))
 317                                 return null;
 318
 319                         string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
 320                         foreach (string dll in binDlls) {
 321                                 string fn = Path.GetFileName (dll);
 322                                 fn = Path.ChangeExtension (fn, null);
 323                                 if (fn != name)
 324                                         continue;
 325
 326                                 assembly = Assembly.LoadFrom (dll);
 327                                 return assembly;
 328                         }
 329
 330                         return null;
 331                 }
 332
 333                 Assembly GetAssemblyFromSource (string vpath, ILocation location)
 334                 {
 335                         vpath = UrlUtils.Combine (BaseVirtualDir, vpath);
 336                         string realPath = context.Request.MapPath (vpath);
 337                         if (!File.Exists (realPath))
 338                                 throw new ParseException (location, "File " + vpath + " not found");
 339
 340                         AddDependency (realPath);
 341
 342                         CompilerResults result = CachingCompiler.Compile (language, realPath, realPath, assemblies);
 343                         if (result.NativeCompilerReturnValue != 0) {
 344                                 StreamReader reader = new StreamReader (realPath);
 345                                 throw new CompilationException (realPath, result.Errors, reader.ReadToEnd ());
 346                         }
 347
 348                         AddAssembly (result.CompiledAssembly, true);
 349                         return result.CompiledAssembly;
 350                 }
 351
 352                 internal Type GetTypeFromBin (string typeName)
 353                 {
 354                         Type result = null;
 355 #if NET_2_0
 356                         IList toplevelAssemblies = BuildManager.TopLevelAssemblies;
 357                         if (toplevelAssemblies != null && toplevelAssemblies.Count > 0) {
 358                                 foreach (Assembly asm in toplevelAssemblies) {
 359                                         Type type = asm.GetType (typeName, false);
 360                                         if (type != null) {
 361                                                 if (result != null)
 362                                                         throw new HttpException (String.Format ("Type {0} is not unique.", typeName));
 363                                         }
 364                                         result = type;
 365                                 }
 366                         }
 367 #endif
 368                         if (!Directory.Exists (PrivateBinPath))
 369                                 if (result == null)
 370                                         throw new HttpException (String.Format ("Type {0} not found.", typeName));
 371                                 else
 372                                         return result;
 373
 374                         string [] binDlls = Directory.GetFiles (PrivateBinPath, "*.dll");
 375                         foreach (string dll in binDlls) {
 376                                 Assembly assembly = Assembly.LoadFrom (dll);
 377                                 Type type = assembly.GetType (typeName, false);
 378                                 if (type != null) {
 379                                         if (result != null)
 380                                                 throw new HttpException (String.Format ("Type {0} is not unique.", typeName));
 381
 382                                         result = type;
 383                                 }
 384                         }
 385
 386                         if (result == null)
 387                                 throw new HttpException (String.Format ("Type {0} not found.", typeName));
 388
 389                         return result;
 390                 }
 391
 392                 internal virtual void AddDependency (string filename)
 393                 {
 394                         if (dependencies == null)
 395                                 dependencies = new ArrayList ();
 396
 397                         if (!dependencies.Contains (filename))
 398                                 dependencies.Add (filename);
 399                 }
 400
 401                 // Properties
 402                 protected abstract string DefaultDirectiveName { get; }
 403
 404                 internal HttpContext Context {
 405                         get { return context; }
 406                 }
 407
 408                 internal string VirtualPath {
 409                         get { return vPath; }
 410                 }
 411
 412                 internal string PhysicalPath {
 413                         get { return physPath; }
 414                 }
 415
 416                 internal string ClassName {
 417                         get { return className; }
 418                 }
 419
 420                 internal bool Debug {
 421                         get { return debug; }
 422                 }
 423
 424                 internal string Language {
 425                         get { return language; }
 426                 }
 427
 428                 internal string Program {
 429                         get { return program; }
 430                 }
 431
 432                 internal ArrayList Assemblies {
 433                         get {
 434                                 if (appAssemblyIndex != -1) {
 435                                         object o = assemblies [appAssemblyIndex];
 436                                         assemblies.RemoveAt (appAssemblyIndex);
 437                                         assemblies.Add (o);
 438                                         appAssemblyIndex = -1;
 439                                 }
 440
 441                                 return assemblies;
 442                         }
 443                 }
 444
 445                 internal ArrayList Dependencies {
 446                         get { return dependencies; }
 447                 }
 448
 449                 internal string PrivateBinPath {
 450                         get {
 451                                 if (privateBinPath != null)
 452                                         return privateBinPath;
 453
 454                                 AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
 455                                 privateBinPath = setup.PrivateBinPath;
 456
 457                                 if (!Path.IsPathRooted (privateBinPath)) {
 458                                         string appbase = setup.ApplicationBase;
 459                                         if (appbase.StartsWith ("file://")) {
 460                                                 appbase = appbase.Substring (7);
 461                                                 if (Path.DirectorySeparatorChar != '/')
 462                                                         appbase = appbase.Replace ('/', Path.DirectorySeparatorChar);
 463                                         }
 464                                         privateBinPath = Path.Combine (appbase, privateBinPath);
 465                                 }
 466
 467                                 return privateBinPath;
 468                         }
 469                 }
 470
 471                 internal string BaseDir {
 472                         get {
 473                                 if (baseDir == null)
 474                                         baseDir = context.Request.MapPath (BaseVirtualDir);
 475
 476                                 return baseDir;
 477                         }
 478                 }
 479
 480                 internal virtual string BaseVirtualDir {
 481                         get {
 482                                 if (baseVDir == null)
 483                                         baseVDir = UrlUtils.GetDirectory (context.Request.FilePath);
 484
 485                                 return baseVDir;
 486                         }
 487                 }
 488
 489 #if NET_2_0
 490                 CompilationSection CompilationConfig {
 491                         get {
 492                                 return (CompilationSection)WebConfigurationManager.GetSection ("system.web/compilation");
 493                         }
 494                 }
 495
 496                 internal TextReader Reader {
 497                         get { return reader; }
 498                         set { reader = value; }
 499                 }
 500 #else
 501                 internal CompilationConfiguration CompilationConfig {
 502                         get {
 503                                 if (compilationConfig == null)
 504                                         compilationConfig = CompilationConfiguration.GetInstance (context);
 505
 506                                 return compilationConfig;
 507                         }
 508                 }
 509 #endif
 510         }
 511 }
 512