/// <summary>
/// Finds the and load assemblies.
/// </summary>
/// <param name="finderParams">The finder parameters.</param>
/// <returns>List<Assembly>.</returns>
private static List <Assembly> FindAndLoadAssemblies(AssemblyFinderParams finderParams)
{
if (Directory.Exists(finderParams.Path))
{
var files = new DirectoryInfo(finderParams.Path).GetFiles($"*{Constants.DllExtension}", finderParams.SearchOption)
.Where(p => p.Name.Contains(finderParams.AssemblyPatternMatch, StringComparison.OrdinalIgnoreCase) && !ExcludedAssemblies.Any(a => p.Name.Contains(a, StringComparison.OrdinalIgnoreCase))).OrderBy(p => p.Name).ToList();
var assemblies = new List <Assembly>();
var assemblyNames = new List <AssemblyName>();
foreach (var item in files)
{
assemblyNames.Add(new AssemblyName(Path.GetFileNameWithoutExtension(item.Name)));
}
foreach (var item in files)
{
if (!AssemblyLoadContext.Default.Assemblies.Any(p => p.GetName().Name.Equals(Path.GetFileNameWithoutExtension(item.Name), StringComparison.OrdinalIgnoreCase)))
{
var context = new SharedLoadContext(item.FullName);
context.AddSharedAssembly(assemblyNames.ToArray());
var assembly = context.LoadMainAssembly();
assemblies.Add(assembly);
}
else
{
var assembly = AssemblyLoadContext.Default.Assemblies.FirstOrDefault(p => p.GetName().Name.Equals(Path.GetFileNameWithoutExtension(item.Name), StringComparison.OrdinalIgnoreCase));
assemblies.Add(assembly);
}
}
return(assemblies);
}
return(new List <Assembly>());
}
/// <summary>
/// Validates the assemblies.
/// </summary>
/// <param name="assemblies">The assemblies.</param>
/// <param name="finderParams">The finder parameters.</param>
/// <exception cref="InvalidOperationException">Assembly {assembly.FullName} does not belong to {finderParams.Path}, application execution has been stopped due to security reasons.</exception>
private static void ValidateAssemblies(IEnumerable <Assembly> assemblies, AssemblyFinderParams finderParams)
{
var thisAssembly = Assembly.GetExecutingAssembly();
var thisAssemblyKey = Shared.ResourceReader.GetEmbeddedResource(finderParams.EmbededResourceKey, thisAssembly);
var thisStrongName = Readers.ResourceReader.GetStrongName(thisAssemblyKey, thisAssembly);
foreach (var assembly in assemblies)
{
var key = Readers.ResourceReader.GetPublicKey(assembly);
var strongName = Readers.ResourceReader.GetStrongName(key, assembly);
if (!strongName.PublicKey.Equals(thisStrongName.PublicKey))
{
throw new InvalidOperationException($"Assembly {assembly.FullName} does not belong to {finderParams.Path}, application execution has been stopped due to security reasons.");
}
}
}
/// <summary>
/// Finds the specified finder parameters.
/// </summary>
/// <param name="finderParams">The finder parameters.</param>
/// <returns>IEnumerable<Assembly>.</returns>
public static IEnumerable <Assembly> Find(AssemblyFinderParams finderParams)
{
var assemblies = FindAndLoadAssemblies(finderParams);
ValidateAssemblies(assemblies, finderParams);
var infos = new List <ModuleInfo>();
foreach (var item in assemblies)
{
infos.Add(GetModuleInfo(item));
}
var sorted = SortDependencies(infos);
return(sorted.Select(p => p.Assembly));
}
