private long GetDependenciesCombinedHash()
{
DateTimeCombiner dateTimeCombiner = new DateTimeCombiner();
// Sort the source dependencies to make the hash code predictable
ArrayList sortedSourceDependencies = new ArrayList(SourceDependencies.Keys);
sortedSourceDependencies.Sort(InvariantComparer.Default);
foreach (string sourceDependency in sortedSourceDependencies)
{
dateTimeCombiner.AddFile(sourceDependency);
}
return(dateTimeCombiner.CombinedHash);
}
/*
* Perform initialization work that should only be done once (per app domain).
*/
private static void DoFirstTimeInit(HttpContext context)
{
// Find out how many recompilations we allow before restarting the appdomain
s_maxRecompilations = CompilationConfiguration.GetRecompilationsBeforeAppRestarts(context);
// Create the temp files directory if it's not already there
string tempFilePath = HttpRuntime.CodegenDirInternal;
if (!FileUtil.DirectoryExists(tempFilePath))
{
try {
Directory.CreateDirectory(tempFilePath);
}
catch (IOException e) {
throw new HttpException(HttpRuntime.FormatResourceString(SR.Failed_to_create_temp_dir, HttpRuntime.GetSafePath(tempFilePath)), e);
}
}
long specialFilesCombinedHash = ReadPreservedSpecialFilesCombinedHash();
Debug.Trace("PreservedAssemblyEntry", "specialFilesCombinedHash=" + specialFilesCombinedHash);
// Delete all the non essential files left over in the codegen dir, unless
// specialFilesCombinedHash is 0, in which case we delete *everything* further down
if (specialFilesCombinedHash != 0)
{
RemoveOldTempFiles();
}
// Use a DateTimeCombiner object to handle the time stamps of all the 'special'
// files that all compilations depend on:
// - The config files (excluding the ones from subdirectories)
// - global.asax
// - System.Web.dll (in case there is a newer version of ASP.NET)
DateTimeCombiner specialFilesDateTimeCombiner = new DateTimeCombiner();
// Add a check for the app's physical path, in case it changes (ASURT 12975)
specialFilesDateTimeCombiner.AddObject(context.Request.PhysicalApplicationPath);
// Process the config files. Note that this only includes the top level ones,
// namely the machine one, and the one in the root of the app. The others are
// handled as regular dependencies.
string appPath = context.Request.ApplicationPath;
string[] configFiles = context.GetConfigurationDependencies(appPath);
_numTopLevelConfigFiles = configFiles.Length;
for (int i = 0; i < _numTopLevelConfigFiles; i++)
{
specialFilesDateTimeCombiner.AddFile(configFiles[i]);
}
// Process global.asax
string appFileName = HttpApplicationFactory.GetApplicationFile(context);
specialFilesDateTimeCombiner.AddFile(appFileName);
// Process System.Web.dll
string aspBinaryFileName = typeof(HttpRuntime).Module.FullyQualifiedName;
specialFilesDateTimeCombiner.AddFile(aspBinaryFileName);
// If they don't match, cleanup everything and write the new hash file
if (specialFilesDateTimeCombiner.CombinedHash != specialFilesCombinedHash)
{
Debug.Trace("PreservedAssemblyEntry", "EnsureFirstTimeInit: hash codes don't match. Old=" +
specialFilesCombinedHash + " New=" + specialFilesDateTimeCombiner.CombinedHash);
RemoveAllCodeGenFiles();
WritePreservedSpecialFilesCombinedHash(specialFilesDateTimeCombiner.CombinedHash);
}
else
{
Debug.Trace("PreservedAssemblyEntry", "PreservedAssemblyEntry: the special files are up to date");
}
}