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AssemblyTable.NetFramework.cs
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145 lines (123 loc) · 5.47 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System;
using System.Collections.Concurrent;
using System.IO;
using System.Reflection;
using System.Runtime.Serialization.Formatters.Binary;
using Microsoft.Win32;
namespace Microsoft.ClearScript.Util
{
internal static class AssemblyTable
{
public static string GetFullAssemblyName(string name)
{
return HostSettings.UseAssemblyTable ? AssemblyTableImpl.GetFullAssemblyNameImpl(name) : AssemblyHelpers.GetFullAssemblyName(name);
}
#region Nested type: AssemblyTableImpl
internal static class AssemblyTableImpl
{
private static ConcurrentDictionary<string, string> table;
static AssemblyTableImpl()
{
// ReSharper disable ConditionIsAlwaysTrueOrFalse
// ReSharper disable HeuristicUnreachableCode
LoadAssemblyTable();
if (table != null)
{
AppDomain.CurrentDomain.AssemblyLoad += (sender, args) => table.TryAdd(args.LoadedAssembly.GetName().Name, args.LoadedAssembly.FullName);
AppDomain.CurrentDomain.GetAssemblies().ForEach(assembly => table.TryAdd(assembly.GetName().Name, assembly.FullName));
}
// ReSharper restore HeuristicUnreachableCode
// ReSharper restore ConditionIsAlwaysTrueOrFalse
}
public static string GetFullAssemblyNameImpl(string name)
{
return ((table != null) && table.TryGetValue(name, out var fullName)) ? fullName : AssemblyHelpers.GetFullAssemblyName(name);
}
private static void LoadAssemblyTable()
{
if (!ReadAssemblyTable() && BuildAssemblyTable())
{
WriteAssemblyTable();
}
}
private static bool ReadAssemblyTable()
{
if (ReadAssemblyTable(MiscHelpers.GetLocalDataRootPath(out var usingAppPath)))
{
return true;
}
return !usingAppPath && ReadAssemblyTable(MiscHelpers.GetLocalDataRootPath(AppDomain.CurrentDomain.BaseDirectory));
}
private static bool ReadAssemblyTable(string rootPath)
{
var succeeded = MiscHelpers.Try(() =>
{
var filePath = GetFilePath(rootPath);
if (File.Exists(filePath))
{
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var formatter = new BinaryFormatter();
table = (ConcurrentDictionary<string, string>)formatter.Deserialize(stream);
}
}
});
return succeeded && (table != null);
}
private static bool BuildAssemblyTable()
{
var succeeded = MiscHelpers.Try(() =>
{
var key = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\.NETFramework");
if (key != null)
{
var dirPath = Path.Combine((string)key.GetValue("InstallRoot"), GetRuntimeVersionDirectoryName());
table = new ConcurrentDictionary<string, string>();
foreach (var filePath in Directory.EnumerateFiles(dirPath, "*.dll", SearchOption.AllDirectories))
{
var path = filePath;
MiscHelpers.Try(() =>
{
var assemblyName = Assembly.ReflectionOnlyLoadFrom(path).GetName();
table.TryAdd(assemblyName.Name, assemblyName.FullName);
});
}
}
});
return succeeded && (table != null);
}
private static void WriteAssemblyTable()
{
if (!WriteAssemblyTable(MiscHelpers.GetLocalDataRootPath(out var usingAppPath)) && !usingAppPath)
{
WriteAssemblyTable(MiscHelpers.GetLocalDataRootPath(AppDomain.CurrentDomain.BaseDirectory));
}
}
private static bool WriteAssemblyTable(string rootPath)
{
return MiscHelpers.Try(() =>
{
var filePath = GetFilePath(rootPath);
using (var stream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None))
{
var formatter = new BinaryFormatter();
formatter.Serialize(stream, table);
}
});
}
private static string GetFilePath(string rootPath)
{
var dirPath = Path.Combine(rootPath, GetRuntimeVersionDirectoryName());
Directory.CreateDirectory(dirPath);
return Path.Combine(dirPath, "AssemblyTable.bin");
}
private static string GetRuntimeVersionDirectoryName()
{
return MiscHelpers.FormatInvariant("v{0}", Environment.Version.ToString(3));
}
}
#endregion
}
}