//
// System.Web.Compilation.CachingCompiler
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002 Ximian, Inc (http://www.ximian.com)
// (c) Copyright Novell, Inc. (http://www.novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.CodeDom.Compiler;
using System.Collections;
using System.Collections.Specialized;
using System.IO;
using System.Reflection;
using System.Threading;
using System.Web.UI;
using System.Web.Caching;
using System.Web.Configuration;
namespace System.Web.Compilation{
class CachingCompiler
{
static string dynamicBase = AppDomain.CurrentDomain.SetupInformation.DynamicBase;
static Hashtable compilationTickets = new Hashtable ();
const string cachePrefix = "@@Assembly";
const string cacheTypePrefix = "@@@Type";
static Hashtable assemblyCache = new Hashtable ();
public static void InsertTypeFileDep (Type type, string filename)
{
CacheDependency dep = new CacheDependency (filename);
HttpRuntime.InternalCache.Insert (cacheTypePrefix + filename, type, dep);
}
public static void InsertType (Type type, string filename)
{
string [] cacheKeys = new string [] { cachePrefix + filename };
CacheDependency dep = new CacheDependency (null, cacheKeys);
HttpRuntime.InternalCache.Insert (cacheTypePrefix + filename, type, dep);
}
public static Type GetTypeFromCache (string filename)
{
return (Type) HttpRuntime.InternalCache [cacheTypePrefix + filename];
}
public static CompilerResults Compile (BaseCompiler compiler)
{
Cache cache = HttpRuntime.InternalCache;
string key = cachePrefix + compiler.Parser.InputFile;
CompilerResults results = (CompilerResults) cache [key];
if (!compiler.IsRebuildingPartial)
if (results != null)
return results;
object ticket;
bool acquired = AcquireCompilationTicket (key, out ticket);
try {
Monitor.Enter (ticket);
results = (CompilerResults) cache [key];
if (!compiler.IsRebuildingPartial)
if (results != null)
return results;
CodeDomProvider comp = compiler.Provider;
CompilerParameters options = compiler.CompilerParameters;
GetExtraAssemblies (options);
results = comp.CompileAssemblyFromDom (options, compiler.CompileUnit);
ArrayList dependencies = compiler.Parser.Dependencies;
if (dependencies != null && dependencies.Count > 0) {
string [] deps = (string []) dependencies.ToArray (typeof (string));
HttpContext ctx = HttpContext.Current;
HttpRequest req = ctx != null ? ctx.Request : null;
if (req == null)
throw new HttpException ("No current context, cannot compile.");
for (int i = 0; i < deps.Length; i++)
deps [i] = req.MapPath (deps [i]);
cache.Insert (key, results, new CacheDependency (deps));
}
} finally {
Monitor.Exit (ticket);
if (acquired)
ReleaseCompilationTicket (key);
}
return results;
}
public static CompilerResults Compile (WebServiceCompiler compiler)
{
string key = cachePrefix + compiler.Parser.PhysicalPath;
Cache cache = HttpRuntime.InternalCache;
CompilerResults results = (CompilerResults) cache [key];
if (results != null)
return results;
object ticket;
bool acquired = AcquireCompilationTicket (key, out ticket);
try {
Monitor.Enter (ticket);
results = (CompilerResults) cache [key];
if (results != null)
return results;
CodeDomProvider comp = compiler.Provider;
CompilerParameters options = compiler.CompilerParameters;
GetExtraAssemblies (options);
results = comp.CompileAssemblyFromFile (options, compiler.InputFile);
string [] deps = (string []) compiler.Parser.Dependencies.ToArray (typeof (string));
cache.Insert (key, results, new CacheDependency (deps));
} finally {
Monitor.Exit (ticket);
if (acquired)
ReleaseCompilationTicket (key);
}
return results;
}
internal static CompilerParameters GetOptions (ICollection assemblies)
{
CompilerParameters options = new CompilerParameters ();
if (assemblies != null) {
StringCollection coll = options.ReferencedAssemblies;
foreach (string str in assemblies)
coll.Add (str);
}
GetExtraAssemblies (options);
return options;
}
public static CompilerResults Compile (string language, string key, string file, ArrayList assemblies)
{
return Compile (language, key, file, assemblies, false);
}
public static CompilerResults Compile (string language, string key, string file, ArrayList assemblies, bool debug)
{
Cache cache = HttpRuntime.InternalCache;
CompilerResults results = (CompilerResults) cache [cachePrefix + key];
if (results != null)
return results;
if (!Directory.Exists (dynamicBase))
Directory.CreateDirectory (dynamicBase);
object ticket;
bool acquired = AcquireCompilationTicket (cachePrefix + key, out ticket);
try {
Monitor.Enter (ticket);
results = (CompilerResults) cache [cachePrefix + key];
if (results != null)
return results;
CodeDomProvider provider = null;
int warningLevel;
string compilerOptions;
string tempdir;
provider = BaseCompiler.CreateProvider (language, out compilerOptions, out warningLevel, out tempdir);
if (provider == null)
throw new HttpException ("Configuration error. Language not supported: " +
language, 500);
CodeDomProvider compiler = provider;
CompilerParameters options = GetOptions (assemblies);
options.IncludeDebugInformation = debug;
options.WarningLevel = warningLevel;
options.CompilerOptions = compilerOptions;
TempFileCollection tempcoll = new TempFileCollection (tempdir, true);
string dllfilename = Path.GetFileName (tempcoll.AddExtension ("dll", true));
options.OutputAssembly = Path.Combine (dynamicBase, dllfilename);
results = compiler.CompileAssemblyFromFile (options, file);
ArrayList realdeps = new ArrayList (assemblies.Count + 1);
realdeps.Add (file);
for (int i = assemblies.Count - 1; i >= 0; i--) {
string current = (string) assemblies [i];
if (Path.IsPathRooted (current))
realdeps.Add (current);
}
string [] deps = (string []) realdeps.ToArray (typeof (string));
cache.Insert (cachePrefix + key, results, new CacheDependency (deps));
} finally {
Monitor.Exit (ticket);
if (acquired)
ReleaseCompilationTicket (cachePrefix + key);
}
return results;
}
public static Type CompileAndGetType (string typename, string language, string key,
string file, ArrayList assemblies)
{
CompilerResults result = CachingCompiler.Compile (language, key, file, assemblies);
if (result.NativeCompilerReturnValue != 0) {
using (StreamReader reader = new StreamReader (file)) {
throw new CompilationException (file, result.Errors, reader.ReadToEnd ());
}
}
Assembly assembly = result.CompiledAssembly;
if (assembly == null) {
using (StreamReader reader = new StreamReader (file)) {
throw new CompilationException (file, result.Errors, reader.ReadToEnd ());
}
}
Type type = assembly.GetType (typename, true);
InsertType (type, file);
return type;
}
static void GetExtraAssemblies (CompilerParameters options)
{
StringCollection refAsm = options.ReferencedAssemblies;
string asmLocation;
string asmName;
ArrayList al = WebConfigurationManager.ExtraAssemblies;
if (al != null && al.Count > 0) {
foreach (object o in al) {
asmName = o as string;
if (asmName != null && !refAsm.Contains (asmName))
refAsm.Add (asmName);
}
}
Assembly asm;
IList list = BuildManager.CodeAssemblies;
if (list != null && list.Count > 0) {
foreach (object o in list) {
asm = o as Assembly;
if (asm == null)
continue;
asmName = asm.Location;
if (asmName != null && !refAsm.Contains (asmName))
refAsm.Add (asmName);
}
}
list = BuildManager.TopLevelAssemblies;
if (list != null && list.Count > 0) {
foreach (object o in list) {
asm = o as Assembly;
if (o == null)
continue;
asmName = asm.Location;
if (!refAsm.Contains (asmName))
refAsm.Add (asmName);
}
}
CompilationSection cfg = WebConfigurationManager.GetWebApplicationSection ("system.web/compilation") as CompilationSection;
AssemblyCollection asmcoll = cfg != null ? cfg.Assemblies : null;
if (asmcoll == null)
return;
foreach (AssemblyInfo ai in asmcoll) {
asmLocation = GetAssemblyLocationFromName (ai.Assembly);
if (asmLocation == null || refAsm.Contains (asmLocation))
continue;
refAsm.Add (asmLocation);
}
}
static string GetAssemblyLocationFromName (string name)
{
Assembly asm = assemblyCache [name] as Assembly;
if (asm != null)
return asm.Location;
try {
asm = Assembly.Load (name);
} catch {
}
if (asm == null)
return null;
assemblyCache [name] = asm;
return asm.Location;
}
static bool AcquireCompilationTicket (string key, out object ticket)
{
lock (compilationTickets.SyncRoot) {
ticket = compilationTickets [key];
if (ticket == null) {
ticket = new object ();
compilationTickets [key] = ticket;
return true;
}
}
return false;
}
static void ReleaseCompilationTicket (string key)
{
lock (compilationTickets.SyncRoot) {
compilationTickets.Remove (key);
}
}
}
}
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