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|
//
// System.Web.Compilation.BuildManager
//
// Authors:
// Chris Toshok (toshok@ximian.com)
// Gonzalo Paniagua Javier (gonzalo@novell.com)
// Marek Habersack (mhabersack@novell.com)
//
// (C) 2006-2008 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.
//
#if NET_2_0
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Web;
using System.Web.Caching;
using System.Web.Configuration;
using System.Web.Hosting;
using System.Web.Util;
namespace System.Web.Compilation {
public sealed class BuildManager {
class BuildItem
{
public BuildProvider buildProvider;
public AssemblyBuilder assemblyBuilder;
public Type codeDomProviderType;
public bool codeGenerated;
public Assembly compiledAssembly;
public CompilerParameters CompilerOptions {
get {
if (buildProvider == null)
throw new HttpException ("No build provider.");
return buildProvider.CodeCompilerType.CompilerParameters;
}
}
public string VirtualPath {
get {
if (buildProvider == null)
throw new HttpException ("No build provider.");
return buildProvider.VirtualPath;
}
}
public CodeCompileUnit CodeUnit {
get {
if (buildProvider == null)
throw new HttpException ("No build provider.");
return buildProvider.CodeUnit;
}
}
public BuildItem (BuildProvider provider)
{
this.buildProvider = provider;
if (provider != null)
codeDomProviderType = GetCodeDomProviderType (provider);
}
public void SetCompiledAssembly (AssemblyBuilder assemblyBuilder, Assembly compiledAssembly)
{
if (this.compiledAssembly != null || this.assemblyBuilder == null || this.assemblyBuilder != assemblyBuilder)
return;
this.compiledAssembly = compiledAssembly;
}
public CodeDomProvider CreateCodeDomProvider ()
{
if (codeDomProviderType == null)
throw new HttpException ("Unable to create compilation provider, no provider type given.");
CodeDomProvider ret;
try {
ret = Activator.CreateInstance (codeDomProviderType) as CodeDomProvider;
} catch (Exception ex) {
throw new HttpException ("Failed to create compilation provider.", ex);
}
if (ret == null)
throw new HttpException ("Unable to instantiate code DOM provider '" + codeDomProviderType + "'.");
return ret;
}
public void GenerateCode ()
{
if (buildProvider == null)
throw new HttpException ("Cannot generate code - missing build provider.");
buildProvider.GenerateCode ();
codeGenerated = true;
}
public void StoreCodeUnit ()
{
if (buildProvider == null)
throw new HttpException ("Cannot generate code - missing build provider.");
if (assemblyBuilder == null)
throw new HttpException ("Cannot generate code - missing assembly builder.");
buildProvider.GenerateCode (assemblyBuilder);
}
public override string ToString ()
{
string ret = "BuildItem [";
string virtualPath = VirtualPath;
if (!String.IsNullOrEmpty (virtualPath))
ret += virtualPath;
ret += "]";
return ret;
}
}
class BuildCacheItem
{
public string compiledCustomString;
public Assembly assembly;
public Type type;
public string virtualPath;
public BuildCacheItem (Assembly assembly, BuildProvider bp, CompilerResults results)
{
this.assembly = assembly;
this.compiledCustomString = bp.GetCustomString (results);
this.type = bp.GetGeneratedType (results);
this.virtualPath = bp.VirtualPath;
}
public override string ToString ()
{
StringBuilder sb = new StringBuilder ("BuildCacheItem [");
bool first = true;
if (!String.IsNullOrEmpty (compiledCustomString)) {
sb.Append ("compiledCustomString: " + compiledCustomString);
first = false;
}
if (assembly != null) {
sb.Append ((first ? "" : "; ") + "assembly: " + assembly.ToString ());
first = false;
}
if (type != null) {
sb.Append ((first ? "" : "; ") + "type: " + type.ToString ());
first = false;
}
if (!String.IsNullOrEmpty (virtualPath)) {
sb.Append ((first ? "" : "; ") + "virtualPath: " + virtualPath);
first = false;
}
sb.Append ("]");
return sb.ToString ();
}
}
enum BuildKind {
Unknown,
Pages,
NonPages,
Application,
Theme,
Fake
};
internal const string FAKE_VIRTUAL_PATH_PREFIX = "/@@MonoFakeVirtualPath@@";
const string BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX = "Build_Manager";
static int BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX_LENGTH = BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX.Length;
static object buildCacheLock = new object ();
static Stack <BuildKind> recursiveBuilds = new Stack <BuildKind> ();
//
// Disabled - see comment at the end of BuildAssembly below
//
// static object buildCountLock = new object ();
// static int buildCount = 0;
static List<Assembly> AppCode_Assemblies = new List<Assembly>();
static List<Assembly> TopLevel_Assemblies = new List<Assembly>();
static bool haveResources;
// The build cache which maps a virtual path to a build item with all the necessary
// bits.
static Dictionary <string, BuildCacheItem> buildCache;
// Maps the virtual path of a non-page build to the assembly that contains the
// compiled type.
static Dictionary <string, Assembly> nonPagesCache;
static List <Assembly> referencedAssemblies = new List <Assembly> ();
static Dictionary <string, object> compilationTickets;
static Assembly globalAsaxAssembly;
static Dictionary <string, BuildKind> knownFileTypes = new Dictionary <string, BuildKind> (StringComparer.OrdinalIgnoreCase) {
{".aspx", BuildKind.Pages},
{".asax", BuildKind.Application},
{".ashx", BuildKind.NonPages},
{".asmx", BuildKind.NonPages},
{".ascx", BuildKind.NonPages},
{".master", BuildKind.NonPages}
};
static BuildManager ()
{
IEqualityComparer <string> comparer;
if (HttpRuntime.CaseInsensitive)
comparer = StringComparer.CurrentCultureIgnoreCase;
else
comparer = StringComparer.CurrentCulture;
buildCache = new Dictionary <string, BuildCacheItem> (comparer);
nonPagesCache = new Dictionary <string, Assembly> (comparer);
compilationTickets = new Dictionary <string, object> (comparer);
}
internal static void ThrowNoProviderException (string extension)
{
string msg = "No registered provider for extension '{0}'.";
throw new HttpException (String.Format (msg, extension));
}
public static object CreateInstanceFromVirtualPath (string virtualPath, Type requiredBaseType)
{
// virtualPath + Exists done in GetCompiledType()
if (requiredBaseType == null)
throw new NullReferenceException (); // This is what MS does, but from somewhere else.
// Get the Type.
Type type = GetCompiledType (virtualPath);
if (type == null)
//throw new HttpException ("Instance creation failed for virtual
//path '" + virtualPath + "'.");
return null;
if (!requiredBaseType.IsAssignableFrom (type)) {
string msg = String.Format ("Type '{0}' does not inherit from '{1}'.",
type.FullName, requiredBaseType.FullName);
throw new HttpException (500, msg);
}
return Activator.CreateInstance (type, null);
}
public static ICollection GetReferencedAssemblies ()
{
List <Assembly> al = new List <Assembly> ();
CompilationSection compConfig = WebConfigurationManager.GetSection ("system.web/compilation") as CompilationSection;
if (compConfig == null)
return al;
bool addAssembliesInBin = false;
foreach (AssemblyInfo info in compConfig.Assemblies) {
if (info.Assembly == "*")
addAssembliesInBin = true;
else
LoadAssembly (info, al);
}
foreach (Assembly topLevelAssembly in TopLevel_Assemblies)
al.Add (topLevelAssembly);
foreach (string assLocation in WebConfigurationManager.ExtraAssemblies)
LoadAssembly (assLocation, al);
if (addAssembliesInBin)
foreach (string s in HttpApplication.BinDirectoryAssemblies)
LoadAssembly (s, al);
lock (buildCacheLock) {
foreach (Assembly asm in referencedAssemblies) {
if (!al.Contains (asm))
al.Add (asm);
}
if (globalAsaxAssembly != null)
al.Add (globalAsaxAssembly);
}
return al;
}
static void LoadAssembly (string path, List <Assembly> al)
{
AddAssembly (Assembly.LoadFrom (path), al);
}
static void LoadAssembly (AssemblyInfo info, List <Assembly> al)
{
AddAssembly (Assembly.Load (info.Assembly), al);
}
static void AddAssembly (Assembly asm, List <Assembly> al)
{
if (al.Contains (asm))
return;
al.Add (asm);
}
[MonoTODO ("Not implemented, always returns null")]
public static BuildDependencySet GetCachedBuildDependencySet (HttpContext context, string virtualPath)
{
return null; // null is ok here until we store the dependency set in the Cache.
}
internal static BuildProvider GetBuildProviderForPath (string virtualPath, bool throwOnMissing)
{
return GetBuildProviderForPath (virtualPath, null, throwOnMissing);
}
internal static BuildProvider GetBuildProviderForPath (string virtualPath, CompilationSection section, bool throwOnMissing)
{
string extension = VirtualPathUtility.GetExtension (virtualPath);
CompilationSection c = section;
if (c == null)
c = WebConfigurationManager.GetSection ("system.web/compilation", virtualPath) as CompilationSection;
if (c == null)
if (throwOnMissing)
ThrowNoProviderException (extension);
else
return null;
BuildProviderCollection coll = c.BuildProviders;
if (coll == null || coll.Count == 0)
ThrowNoProviderException (extension);
BuildProvider provider = coll.GetProviderForExtension (extension);
if (provider == null)
if (throwOnMissing)
ThrowNoProviderException (extension);
else
return null;
provider.SetVirtualPath (virtualPath);
return provider;
}
static string GetAbsoluteVirtualPath (string virtualPath)
{
string vp;
if (!VirtualPathUtility.IsRooted (virtualPath)) {
HttpContext ctx = HttpContext.Current;
HttpRequest req = ctx != null ? ctx.Request : null;
if (req != null)
vp = VirtualPathUtility.GetDirectory (req.FilePath) + virtualPath;
else
throw new HttpException ("No context, cannot map paths.");
} else
vp = virtualPath;
if (VirtualPathUtility.IsAppRelative (vp))
return VirtualPathUtility.ToAbsolute (vp);
else
return vp;
}
static BuildCacheItem GetCachedItem (string virtualPath)
{
BuildCacheItem ret;
lock (buildCacheLock) {
if (buildCache.TryGetValue (virtualPath, out ret))
return ret;
}
return null;
}
public static Assembly GetCompiledAssembly (string virtualPath)
{
string vp = GetAbsoluteVirtualPath (virtualPath);
BuildCacheItem ret = GetCachedItem (vp);
if (ret != null)
return ret.assembly;
BuildAssembly (vp);
ret = GetCachedItem (vp);
if (ret != null)
return ret.assembly;
return null;
}
public static Type GetCompiledType (string virtualPath)
{
string vp = GetAbsoluteVirtualPath (virtualPath);
BuildCacheItem ret = GetCachedItem (vp);
if (ret != null)
return ret.type;
BuildAssembly (vp);
ret = GetCachedItem (vp);
if (ret != null)
return ret.type;
return null;
}
public static string GetCompiledCustomString (string virtualPath)
{
string vp = GetAbsoluteVirtualPath (virtualPath);
BuildCacheItem ret = GetCachedItem (vp);
if (ret != null)
return ret.compiledCustomString;
BuildAssembly (vp);
ret = GetCachedItem (vp);
if (ret != null)
return ret.compiledCustomString;
return null;
}
static List <string> GetFilesForBuild (string virtualPath, string physicalDir, out BuildKind kind)
{
string extension = VirtualPathUtility.GetExtension (virtualPath);
List <string> ret = new List <string> ();
if (StrUtils.StartsWith (virtualPath, FAKE_VIRTUAL_PATH_PREFIX)) {
kind = BuildKind.Fake;
return ret;
}
if (!knownFileTypes.TryGetValue (extension, out kind)) {
string tmp;
if (VirtualPathUtility.IsAbsolute (virtualPath))
tmp = VirtualPathUtility.ToAppRelative (virtualPath);
else
tmp = virtualPath;
if (StrUtils.StartsWith (tmp, "~/App_Themes/"))
kind = BuildKind.Theme;
else
kind = BuildKind.Unknown;
}
if (kind == BuildKind.Theme || kind == BuildKind.Application)
return ret;
bool doBatch = BatchMode;
lock (buildCacheLock) {
if (recursiveBuilds.Count > 0 && recursiveBuilds.Peek () == kind)
doBatch = false;
recursiveBuilds.Push (kind);
}
if (doBatch) {
string[] files = Directory.GetFiles (physicalDir, "*.*");
BuildKind fileKind;
foreach (string file in files) {
if (!knownFileTypes.TryGetValue (Path.GetExtension (file), out fileKind))
continue;
if (kind == fileKind)
ret.Add (file);
}
} else
ret.Add (Path.Combine (physicalDir, VirtualPathUtility.GetFileName (virtualPath)));
return ret;
}
static Type GetCodeDomProviderType (BuildProvider provider)
{
CompilerType codeCompilerType;
Type codeDomProviderType = null;
codeCompilerType = provider.CodeCompilerType;
if (codeCompilerType != null)
codeDomProviderType = codeCompilerType.CodeDomProviderType;
if (codeDomProviderType == null)
throw new HttpException (String.Concat ("Provider '", provider, " 'fails to specify the compiler type."));
return codeDomProviderType;
}
static string GetVirtualPathDirectory (string virtualPath)
{
string vp;
if (!VirtualPathUtility.IsRooted (virtualPath))
vp = VirtualPathUtility.ToAbsolute ("~/" + virtualPath);
else {
if (VirtualPathUtility.IsAppRelative (virtualPath))
vp = VirtualPathUtility.ToAbsolute (virtualPath);
else
vp = virtualPath;
}
return VirtualPathUtility.GetDirectory (vp);
}
static List <BuildItem> LoadBuildProviders (string virtualPath, string virtualDir, Dictionary <string, bool> vpCache,
out BuildKind kind, out string assemblyBaseName)
{
HttpContext ctx = HttpContext.Current;
HttpRequest req = ctx != null ? ctx.Request : null;
if (req == null)
throw new HttpException ("No context available, cannot build.");
CompilationSection section = WebConfigurationManager.GetSection ("system.web/compilation", virtualPath) as CompilationSection;
string physicalDir = req.MapPath (virtualDir);
List <string> files;
try {
files = GetFilesForBuild (virtualPath, physicalDir, out kind);
} catch (Exception ex) {
throw new HttpException ("Error loading build providers for path '" + virtualDir + "'.", ex);
}
List <BuildItem> ret = new List <BuildItem> ();
BuildProvider provider = null;
switch (kind) {
case BuildKind.Theme:
assemblyBaseName = "App_Theme_";
provider = new ThemeDirectoryBuildProvider ();
provider.SetVirtualPath (virtualPath);
break;
case BuildKind.Application:
assemblyBaseName = "App_global.asax.";
provider = new ApplicationFileBuildProvider ();
provider.SetVirtualPath (virtualPath);
break;
case BuildKind.Fake:
provider = GetBuildProviderForPath (virtualPath, section, false);
assemblyBaseName = null;
break;
default:
assemblyBaseName = null;
break;
}
if (provider != null) {
ret.Add (new BuildItem (provider));
return ret;
}
string fileVirtualPath;
string fileName;
lock (buildCacheLock) {
foreach (string f in files) {
fileName = Path.GetFileName (f);
fileVirtualPath = VirtualPathUtility.Combine (virtualDir, fileName);
if (buildCache.ContainsKey (fileVirtualPath) || vpCache.ContainsKey (fileVirtualPath))
continue;
vpCache.Add (fileVirtualPath, true);
provider = GetBuildProviderForPath (fileVirtualPath, section, false);
if (provider == null)
continue;
ret.Add (new BuildItem (provider));
}
}
return ret;
}
static AssemblyBuilder CreateAssemblyBuilder (string assemblyBaseName, string virtualPath, BuildItem buildItem)
{
buildItem.assemblyBuilder = new AssemblyBuilder (virtualPath, buildItem.CreateCodeDomProvider (), assemblyBaseName);
buildItem.assemblyBuilder.CompilerOptions = buildItem.CompilerOptions;
return buildItem.assemblyBuilder;
}
static Dictionary <string, CompileUnitPartialType> GetUnitPartialTypes (CodeCompileUnit unit)
{
Dictionary <string, CompileUnitPartialType> ret = null;
CompileUnitPartialType pt;
foreach (CodeNamespace ns in unit.Namespaces) {
foreach (CodeTypeDeclaration type in ns.Types) {
if (type.IsPartial) {
pt = new CompileUnitPartialType (unit, ns, type);
if (ret == null)
ret = new Dictionary <string, CompileUnitPartialType> ();
ret.Add (pt.TypeName, pt);
}
}
}
return ret;
}
static bool TypeHasConflictingMember (CodeTypeDeclaration type, CodeMemberMethod member)
{
if (type == null || member == null)
return false;
CodeMemberMethod method;
string methodName = member.Name;
int count;
foreach (CodeTypeMember m in type.Members) {
if (m.Name != methodName)
continue;
method = m as CodeMemberMethod;
if (method == null)
continue;
if ((count = method.Parameters.Count) != member.Parameters.Count)
continue;
CodeParameterDeclarationExpressionCollection methodA = method.Parameters;
CodeParameterDeclarationExpressionCollection methodB = member.Parameters;
for (int i = 0; i < count; i++)
if (methodA [i].Type != methodB [i].Type)
continue;
return true;
}
return false;
}
static bool TypeHasConflictingMember (CodeTypeDeclaration type, CodeMemberField member)
{
if (type == null || member == null)
return false;
CodeMemberField field = FindMemberByName (type, member.Name) as CodeMemberField;
if (field == null)
return false;
if (field.Type == member.Type)
return false; // This will get "flattened" by AssemblyBuilder
return true;
}
static bool TypeHasConflictingMember (CodeTypeDeclaration type, CodeTypeMember member)
{
if (type == null || member == null)
return false;
return (FindMemberByName (type, member.Name) != null);
}
static CodeTypeMember FindMemberByName (CodeTypeDeclaration type, string name)
{
foreach (CodeTypeMember m in type.Members) {
if (m == null || m.Name != name)
continue;
return m;
}
return null;
}
static bool PartialTypesConflict (CodeTypeDeclaration typeA, CodeTypeDeclaration typeB)
{
bool conflict;
Type type;
foreach (CodeTypeMember member in typeB.Members) {
conflict = false;
type = member.GetType ();
if (type == typeof (CodeMemberMethod))
conflict = TypeHasConflictingMember (typeA, (CodeMemberMethod) member);
else if (type == typeof (CodeMemberField))
conflict = TypeHasConflictingMember (typeA, (CodeMemberField) member);
else
conflict = TypeHasConflictingMember (typeA, member);
if (conflict)
return true;
}
return false;
}
static bool CanAcceptCode (AssemblyBuilder assemblyBuilder, BuildItem buildItem)
{
CodeCompileUnit newUnit = buildItem.CodeUnit;
if (newUnit == null)
return true;
Dictionary <string, CompileUnitPartialType> unitPartialTypes = GetUnitPartialTypes (newUnit);
if (unitPartialTypes == null)
return true;
if (assemblyBuilder.Units.Count > CompilationConfig.MaxBatchSize)
return false;
CompileUnitPartialType pt;
foreach (List <CompileUnitPartialType> partialTypes in assemblyBuilder.PartialTypes.Values)
foreach (CompileUnitPartialType cupt in partialTypes)
if (unitPartialTypes.TryGetValue (cupt.TypeName, out pt) && PartialTypesConflict (cupt.PartialType, pt.PartialType))
return false;
return true;
}
static void AssignToAssemblyBuilder (string assemblyBaseName, string virtualPath, BuildItem buildItem,
Dictionary <Type, List <AssemblyBuilder>> assemblyBuilders)
{
if (!buildItem.codeGenerated)
buildItem.GenerateCode ();
List <AssemblyBuilder> builders;
if (!assemblyBuilders.TryGetValue (buildItem.codeDomProviderType, out builders)) {
builders = new List <AssemblyBuilder> ();
assemblyBuilders.Add (buildItem.codeDomProviderType, builders);
}
// Put it in the first assembly builder that doesn't have conflicting
// partial types
foreach (AssemblyBuilder assemblyBuilder in builders) {
if (CanAcceptCode (assemblyBuilder, buildItem)) {
buildItem.assemblyBuilder = assemblyBuilder;
buildItem.StoreCodeUnit ();
return;
}
}
// None of the existing builders can accept this unit, get it a new builder
builders.Add (CreateAssemblyBuilder (assemblyBaseName, virtualPath, buildItem));
buildItem.StoreCodeUnit ();
}
static void AssertVirtualPathExists (string virtualPath)
{
string realpath;
bool fakePath;
if (StrUtils.StartsWith (virtualPath, FAKE_VIRTUAL_PATH_PREFIX)) {
realpath = virtualPath.Substring (FAKE_VIRTUAL_PATH_PREFIX.Length);
fakePath = true;
} else {
HttpContext ctx = HttpContext.Current;
HttpRequest req = ctx != null ? ctx.Request : null;
if (req == null)
throw new HttpException ("Missing context, cannot continue.");
realpath = req.MapPath (virtualPath);
}
if (!File.Exists (realpath) && !Directory.Exists (realpath))
throw new HttpException (404,
"The file '" + virtualPath + "' does not exist.",
fakePath ? Path.GetFileName (realpath) : virtualPath);
}
static void BuildAssembly (string virtualPath)
{
AssertVirtualPathExists (virtualPath);
object ticket;
bool acquired;
string virtualDir = GetVirtualPathDirectory (virtualPath);
BuildKind buildKind = BuildKind.Unknown;
bool kindPushed = false;
acquired = AcquireCompilationTicket (virtualDir, out ticket);
try {
Monitor.Enter (ticket);
lock (buildCacheLock) {
if (buildCache.ContainsKey (virtualPath))
return;
}
string assemblyBaseName;
Dictionary <string, bool> vpCache = new Dictionary <string, bool> ();
List <BuildItem> buildItems = LoadBuildProviders (virtualPath, virtualDir, vpCache, out buildKind, out assemblyBaseName);
kindPushed = true;
if (buildItems.Count == 0)
return;
Dictionary <Type, List <AssemblyBuilder>> assemblyBuilders = new Dictionary <Type, List <AssemblyBuilder>> ();
bool checkForRecursion = buildKind == BuildKind.NonPages;
foreach (BuildItem buildItem in buildItems) {
if (checkForRecursion) {
// Expensive but, alas, necessary - the builder in
// our list might've been put into a different
// assembly in a recursive call.
lock (buildCacheLock) {
if (buildCache.ContainsKey (buildItem.VirtualPath))
continue;
}
}
if (buildItem.assemblyBuilder == null)
AssignToAssemblyBuilder (assemblyBaseName, virtualPath, buildItem, assemblyBuilders);
}
CompilerResults results;
Assembly compiledAssembly;
string vp;
BuildProvider bp;
foreach (List <AssemblyBuilder> abuilders in assemblyBuilders.Values) {
foreach (AssemblyBuilder abuilder in abuilders) {
abuilder.AddAssemblyReference (GetReferencedAssemblies () as List <Assembly>);
results = abuilder.BuildAssembly (virtualPath);
// No results is not an error - it is possible that the assembly builder contained only .asmx and
// .ashx files which had no body, just the directive. In such case, no code unit or code file is added
// to the assembly builder and, in effect, no assembly is produced but there are STILL types that need
// to be added to the cache.
compiledAssembly = results != null ? results.CompiledAssembly : null;
lock (buildCacheLock) {
switch (buildKind) {
case BuildKind.NonPages:
if (compiledAssembly != null && !referencedAssemblies.Contains (compiledAssembly))
referencedAssemblies.Add (compiledAssembly);
break;
case BuildKind.Application:
globalAsaxAssembly = compiledAssembly;
break;
}
foreach (BuildItem buildItem in buildItems) {
if (buildItem.assemblyBuilder != abuilder)
continue;
vp = buildItem.VirtualPath;
bp = buildItem.buildProvider;
buildItem.SetCompiledAssembly (abuilder, compiledAssembly);
if (!buildCache.ContainsKey (vp)) {
AddToCache (vp, bp);
buildCache.Add (vp, new BuildCacheItem (compiledAssembly, bp, results));
}
if (compiledAssembly != null && !nonPagesCache.ContainsKey (vp))
nonPagesCache.Add (vp, compiledAssembly);
}
}
}
}
// WARNING: enabling this code breaks the test suite - it stays
// disabled until I figure out what to do about it.
// See http://support.microsoft.com/kb/319947
// lock (buildCountLock) {
// buildCount++;
// if (buildCount > CompilationConfig.NumRecompilesBeforeAppRestart)
// HttpRuntime.UnloadAppDomain ();
// }
} finally {
if (kindPushed && buildKind == BuildKind.Pages || buildKind == BuildKind.NonPages) {
lock (buildCacheLock) {
recursiveBuilds.Pop ();
}
}
Monitor.Exit (ticket);
if (acquired)
ReleaseCompilationTicket (virtualDir);
}
}
internal static void AddToCache (string virtualPath, BuildProvider bp)
{
HttpContext ctx = HttpContext.Current;
HttpRequest req = ctx != null ? ctx.Request : null;
if (req == null)
throw new HttpException ("No current context.");
CacheItemRemovedCallback cb = new CacheItemRemovedCallback (OnVirtualPathChanged);
CacheDependency dep;
ICollection col = bp.VirtualPathDependencies;
int count;
if (col != null && (count = col.Count) > 0) {
string[] files = new string [count];
int fileCount = 0;
string file;
foreach (object o in col) {
file = o as string;
if (String.IsNullOrEmpty (file))
continue;
files [fileCount++] = req.MapPath (file);
}
dep = new CacheDependency (files);
} else
dep = null;
HttpRuntime.InternalCache.Add (BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX + virtualPath,
true,
dep,
Cache.NoAbsoluteExpiration,
Cache.NoSlidingExpiration,
CacheItemPriority.High,
cb);
}
static int RemoveVirtualPathFromCaches (string virtualPath)
{
lock (buildCacheLock) {
// This is expensive, but we must do it - we must not leave
// the assembly in which the invalidated type lived. At the same
// time, we must remove the virtual paths which were in that
// assembly from the other caches, so that they get recompiled.
BuildCacheItem item = GetCachedItem (virtualPath);
if (item == null)
return 0;
if (buildCache.ContainsKey (virtualPath))
buildCache.Remove (virtualPath);
Assembly asm;
if (nonPagesCache.TryGetValue (virtualPath, out asm)) {
nonPagesCache.Remove (virtualPath);
if (referencedAssemblies.Contains (asm))
referencedAssemblies.Remove (asm);
List <string> keysToRemove = new List <string> ();
foreach (KeyValuePair <string, Assembly> kvp in nonPagesCache)
if (kvp.Value == asm)
keysToRemove.Add (kvp.Key);
foreach (string key in keysToRemove) {
nonPagesCache.Remove (key);
if (buildCache.ContainsKey (key))
buildCache.Remove (key);
}
}
return 1;
}
}
static void OnVirtualPathChanged (string key, object value, CacheItemRemovedReason removedReason)
{
string virtualPath;
if (StrUtils.StartsWith (key, BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX))
virtualPath = key.Substring (BUILD_MANAGER_VIRTUAL_PATH_CACHE_PREFIX_LENGTH);
else
return;
RemoveVirtualPathFromCaches (virtualPath);
}
static bool AcquireCompilationTicket (string key, out object ticket)
{
lock (((ICollection)compilationTickets).SyncRoot) {
if (!compilationTickets.TryGetValue (key, out ticket)) {
ticket = new Mutex ();
compilationTickets.Add (key, ticket);
return true;
}
}
return false;
}
static void ReleaseCompilationTicket (string key)
{
lock (((ICollection)compilationTickets).SyncRoot) {
if (compilationTickets.ContainsKey (key))
compilationTickets.Remove (key);
}
}
// The 2 GetType() overloads work on the global.asax, App_GlobalResources, App_WebReferences or App_Browsers
public static Type GetType (string typeName, bool throwOnError)
{
return GetType (typeName, throwOnError, false);
}
public static Type GetType (string typeName, bool throwOnError, bool ignoreCase)
{
Type ret = null;
try {
foreach (Assembly asm in TopLevel_Assemblies) {
ret = asm.GetType (typeName, throwOnError, ignoreCase);
if (ret != null)
break;
}
} catch (Exception ex) {
throw new HttpException ("Failed to find the specified type.", ex);
}
return ret;
}
internal static ICollection GetVirtualPathDependencies (string virtualPath, BuildProvider bprovider)
{
BuildProvider provider = bprovider;
if (provider == null)
provider = GetBuildProviderForPath (virtualPath, false);
if (provider == null)
return null;
return provider.VirtualPathDependencies;
}
public static ICollection GetVirtualPathDependencies (string virtualPath)
{
return GetVirtualPathDependencies (virtualPath, null);
}
// Assemblies built from the App_Code directory
public static IList CodeAssemblies {
get { return AppCode_Assemblies; }
}
internal static IList TopLevelAssemblies {
get { return TopLevel_Assemblies; }
}
internal static bool HaveResources {
get { return haveResources; }
set { haveResources = value; }
}
internal static bool BatchMode {
get { return CompilationConfig.Batch; }
}
internal static CompilationSection CompilationConfig {
get { return WebConfigurationManager.GetSection ("system.web/compilation") as CompilationSection; }
}
}
}
#endif
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