public DnsApplication(IDnsServer dnsServer, string name)
{
_dnsServer = dnsServer;
_name = name;
_appContext = new DnsApplicationAssemblyLoadContext(_dnsServer.ApplicationFolder);
//load app assemblies
Assembly[] loadedAssemblies = AppDomain.CurrentDomain.GetAssemblies();
List <Assembly> appAssemblies = new List <Assembly>();
foreach (string dllFile in Directory.GetFiles(_dnsServer.ApplicationFolder, "*.dll", SearchOption.TopDirectoryOnly))
{
string dllFileName = Path.GetFileNameWithoutExtension(dllFile);
bool isLoaded = false;
foreach (Assembly loadedAssembly in loadedAssemblies)
{
AssemblyName assemblyName = loadedAssembly.GetName();
if (assemblyName.CodeBase != null)
{
if (Path.GetFileNameWithoutExtension(assemblyName.CodeBase).Equals(dllFileName, StringComparison.OrdinalIgnoreCase))
{
isLoaded = true;
break;
}
}
else if ((assemblyName.Name != null) && assemblyName.Name.Equals(dllFileName, StringComparison.OrdinalIgnoreCase))
{
isLoaded = true;
break;
}
}
if (isLoaded)
{
continue;
}
try
{
string pdbFile = Path.Combine(_dnsServer.ApplicationFolder, Path.GetFileNameWithoutExtension(dllFile) + ".pdb");
if (File.Exists(pdbFile))
{
using (FileStream dllStream = new FileStream(dllFile, FileMode.Open, FileAccess.Read))
{
using (FileStream pdbStream = new FileStream(pdbFile, FileMode.Open, FileAccess.Read))
{
appAssemblies.Add(_appContext.LoadFromStream(dllStream, pdbStream));
}
}
}
else
{
using (FileStream dllStream = new FileStream(dllFile, FileMode.Open, FileAccess.Read))
{
appAssemblies.Add(_appContext.LoadFromStream(dllStream));
}
}
}
catch (Exception ex)
{
_dnsServer.WriteLog(ex);
}
}
//load apps
Dictionary <string, IDnsApplication> dnsApplications = new Dictionary <string, IDnsApplication>();
Dictionary <string, IDnsAppRecordRequestHandler> dnsAppRecordRequestHandlers = new Dictionary <string, IDnsAppRecordRequestHandler>(2);
Dictionary <string, IDnsRequestController> dnsRequestControllers = new Dictionary <string, IDnsRequestController>(1);
Dictionary <string, IDnsAuthoritativeRequestHandler> dnsAuthoritativeRequestHandlers = new Dictionary <string, IDnsAuthoritativeRequestHandler>(1);
Dictionary <string, IDnsQueryLogger> dnsQueryLoggers = new Dictionary <string, IDnsQueryLogger>(1);
Type dnsApplicationInterface = typeof(IDnsApplication);
foreach (Assembly appAssembly in appAssemblies)
{
try
{
foreach (Type classType in appAssembly.ExportedTypes)
{
bool isDnsApp = false;
foreach (Type interfaceType in classType.GetInterfaces())
{
if (interfaceType == dnsApplicationInterface)
{
isDnsApp = true;
break;
}
}
if (isDnsApp)
{
try
{
IDnsApplication app = Activator.CreateInstance(classType) as IDnsApplication;
dnsApplications.Add(classType.FullName, app);
if (app is IDnsAppRecordRequestHandler appRecordHandler)
{
dnsAppRecordRequestHandlers.Add(classType.FullName, appRecordHandler);
}
if (app is IDnsRequestController requestController)
{
dnsRequestControllers.Add(classType.FullName, requestController);
}
if (app is IDnsAuthoritativeRequestHandler requestHandler)
{
dnsAuthoritativeRequestHandlers.Add(classType.FullName, requestHandler);
}
if (app is IDnsQueryLogger logger)
{
dnsQueryLoggers.Add(classType.FullName, logger);
}
if (_version is null)
{
_version = appAssembly.GetName().Version;
}
}
catch (Exception ex)
{
_dnsServer.WriteLog(ex);
}
}
}
}
catch (Exception ex)
{
_dnsServer.WriteLog(ex);
}
}
if (_version is null)
{
if (dnsApplications.Count > 0)
{
_version = new Version(1, 0);
}
else
{
_version = new Version(0, 0);
}
}
_dnsApplications = dnsApplications;
_dnsAppRecordRequestHandlers = dnsAppRecordRequestHandlers;
_dnsRequestControllers = dnsRequestControllers;
_dnsAuthoritativeRequestHandlers = dnsAuthoritativeRequestHandlers;
_dnsQueryLoggers = dnsQueryLoggers;
}