mcs/class/System.Web/System.Web.Compilation/CachingCompiler.cs

   1 //
   2 // System.Web.Compilation.CachingCompiler
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2002 Ximian, Inc (http://www.ximian.com)
   8 // (c) Copyright Novell, Inc. (http://www.novell.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.Collections.Specialized;
  35 using System.IO;
  36 using System.Reflection;
  37 using System.Web.UI;
  38 using System.Web.Caching;
  39 using System.Web.Configuration;
  40
  41 namespace System.Web.Compilation
  42 {
  43         class CachingCompiler
  44         {
  45                 static object compilationLock = new object ();
  46                 const string cachePrefix = "@@Assembly";
  47                 const string cacheTypePrefix = "@@@Type";
  48
  49                 public static void InsertType (Type type, string filename)
  50                 {
  51                         string [] cacheKeys = new string [] { cachePrefix + filename };
  52                         CacheDependency dep = new CacheDependency (null, cacheKeys);
  53                         HttpRuntime.Cache.Insert (cacheTypePrefix + filename, type, dep);
  54                 }
  55
  56                 public static Type GetTypeFromCache (string filename)
  57                 {
  58                         return (Type) HttpRuntime.Cache [cacheTypePrefix + filename];
  59                 }
  60
  61                 public static CompilerResults Compile (BaseCompiler compiler)
  62                 {
  63                         Cache cache = HttpRuntime.Cache;
  64                         string key = cachePrefix + compiler.Parser.InputFile;
  65                         CompilerResults results = (CompilerResults) cache [key];
  66                         if (results != null)
  67                                 return results;
  68
  69                         lock (compilationLock) {
  70                                 results = (CompilerResults) cache [key];
  71                                 if (results != null)
  72                                         return results;
  73
  74                                 ICodeCompiler comp = compiler.Compiler;
  75                                 results = comp.CompileAssemblyFromDom (compiler.CompilerParameters, compiler.Unit);
  76                                 string [] deps = (string []) compiler.Parser.Dependencies.ToArray (typeof (string));
  77                                 cache.Insert (key, results, new CacheDependency (deps));
  78                         }
  79
  80                         return results;
  81                 }
  82
  83                 public static CompilerResults Compile (WebServiceCompiler compiler)
  84                 {
  85                         string key = cachePrefix + compiler.Parser.PhysicalPath;
  86                         Cache cache = HttpRuntime.Cache;
  87                         CompilerResults results = (CompilerResults) cache [key];
  88                         if (results != null)
  89                                 return results;
  90
  91                         lock (compilationLock) {
  92                                 results = (CompilerResults) cache [key];
  93                                 if (results != null)
  94                                         return results;
  95
  96                                 SimpleWebHandlerParser parser = compiler.Parser;
  97                                 CompilerParameters options = compiler.CompilerOptions;
  98                                 options.IncludeDebugInformation = parser.Debug;
  99                                 results = compiler.Compiler.CompileAssemblyFromFile (options, compiler.InputFile);
 100                                 string [] deps = (string []) parser.Dependencies.ToArray (typeof (string));
 101                                 cache.Insert (key, results, new CacheDependency (deps));
 102                         }
 103
 104                         return results;
 105                 }
 106
 107                 internal static CompilerParameters GetOptions (ICollection assemblies)
 108                 {
 109                         CompilerParameters options = new CompilerParameters ();
 110                         if (assemblies != null) {
 111                                 StringCollection coll = options.ReferencedAssemblies;
 112                                 foreach (string str in assemblies)
 113                                         coll.Add (str);
 114                         }
 115
 116                         return options;
 117                 }
 118
 119                 public static CompilerResults Compile (string language, string key, string file,
 120                                                         ArrayList assemblies)
 121                 {
 122                         Cache cache = HttpRuntime.Cache;
 123                         CompilerResults results = (CompilerResults) cache [cachePrefix + key];
 124                         if (results != null)
 125                                 return results;
 126
 127                         lock (compilationLock) {
 128                                 results = (CompilerResults) cache [cachePrefix + key];
 129                                 if (results != null)
 130                                         return results;
 131
 132                                 CompilationConfiguration config;
 133                                 config = CompilationConfiguration.GetInstance (HttpContext.Current);
 134                                 CodeDomProvider provider = config.GetProvider (language);
 135                                 if (provider == null)
 136                                         throw new HttpException ("Configuration error. Language not supported: " +
 137                                                                   language, 500);
 138
 139                                 ICodeCompiler compiler = provider.CreateCompiler ();
 140                                 CompilerParameters options = GetOptions (assemblies);
 141                                 results = compiler.CompileAssemblyFromFile (options, file);
 142                                 ArrayList realdeps = new ArrayList (assemblies.Count + 1);
 143                                 realdeps.Add (file);
 144                                 for (int i = assemblies.Count - 1; i >= 0; i--) {
 145                                         string current = (string) assemblies [i];
 146                                         if (Path.IsPathRooted (current))
 147                                                 realdeps.Add (current);
 148                                 }
 149
 150                                 string [] deps = (string []) realdeps.ToArray (typeof (string));
 151                                 cache.Insert (cachePrefix + key, results, new CacheDependency (deps));
 152                         }
 153
 154                         return results;
 155                 }
 156
 157                 public static Type CompileAndGetType (string typename, string language, string key,
 158                                                 string file, ArrayList assemblies)
 159                 {
 160                         CompilerResults result = CachingCompiler.Compile (language, key, file, assemblies);
 161                         if (result.NativeCompilerReturnValue != 0) {
 162                                 StreamReader reader = new StreamReader (file);
 163                                 throw new CompilationException (file, result.Errors, reader.ReadToEnd ());
 164                         }
 165
 166                         Assembly assembly = result.CompiledAssembly;
 167                         if (assembly == null) {
 168                                 StreamReader reader = new StreamReader (file);
 169                                 throw new CompilationException (file, result.Errors, reader.ReadToEnd ());
 170                         }
 171
 172                         Type type = assembly.GetType (typename, true);
 173                         InsertType (type, file);
 174                         return type;
 175                 }
 176         }
 177 }
 178