private DynamicScriptExecuteResult <T> ExecuteUntrustedCode <T>(Type type, MethodInfo methodInfo, int millisecondsTimeout, params object[] parameters)
{
string errorMessage = string.Format("[Assembly:{0},Method:{1},Timeout:{2}, execution timed out.", type.Assembly.FullName, methodInfo.Name, millisecondsTimeout);
DynamicScriptExecuteResult <T> result = DynamicScriptExecuteResult <T> .Error(errorMessage);
var tokenSource = new CancellationTokenSource();
var token = tokenSource.Token;
var t = Task.Factory.StartNew(() =>
{
result = ExecuteTrustedCode <T>(type, methodInfo, parameters);
}, token);
if (!t.Wait(millisecondsTimeout, token))
{
tokenSource.Cancel();
_logger.LogError(errorMessage);
return(DynamicScriptExecuteResult <T> .Error("execution timed out!"));
}
return(result);
//这里用不同的应用程序域重构，增强沙箱支持
//Note:.NET Core 3.0 Preview 5 start support
//暂时不支持沙箱环境
//if (SettingsConfig.Instance.SandboxEnable)
//{
// object obj = null;
// var sandBoxer = new SandBoxer();
// obj = sandBoxer.ExecuteUntrustedCode(type, functionName, 0, parameters);
// sandBoxer.UnloadSandBoxer();
// return (T)obj;
//}
}
private DynamicScriptExecuteResult <T> CallFunction <T>(DynamicScript dynamicScript)
{
if (dynamicScript.FunctionName.IsNullOrEmpty())
{
return(DynamicScriptExecuteResult <T> .Error($"function name can not be null."));
}
if (_scriptHash.IsNullOrEmpty() || !_scriptTypeDict.ContainsKey(_scriptHash))
{
return(DynamicScriptExecuteResult <T> .Error($"type not found."));
}
var type = _scriptTypeDict[_scriptHash];
var methodInfo = type.Method(dynamicScript.FunctionName);
if (methodInfo == null)
{
return(DynamicScriptExecuteResult <T> .Error($"function name can not be null."));
}
if (dynamicScript.IsTrustedScript)
{
return(ExecuteTrustedCode <T>(type, methodInfo, dynamicScript.Parameters));
}
else
{
if (dynamicScript.MillisecondsTimeout <= 0)
{
return(DynamicScriptExecuteResult <T> .Error("if execute untrusted code,please setting the milliseconds timeout!"));
}
return(ExecuteUntrustedCode <T>(type, methodInfo, dynamicScript.MillisecondsTimeout, dynamicScript.Parameters));
}
}
private DynamicScriptExecuteResult <T> ExecuteTrustedCode <T>(Type type, MethodInfo methodInfo, params object[] parameters)
{
object result = null;
var parms = methodInfo.GetParameters();
var safeParameters = SafeTypeConvertParameters(methodInfo.Name, parms, parameters);
if (methodInfo.IsStatic)
{
result = type.TryCallMethod(methodInfo.Name, true, parms.Select(t => t.Name).ToArray(), parms.Select(t => t.ParameterType).ToArray(), safeParameters);
}
else
{
result = Activator.CreateInstance(type).TryCallMethod(methodInfo.Name, true, parms.Select(t => t.Name).ToArray(), parms.Select(t => t.ParameterType).ToArray(), safeParameters);
}
return(DynamicScriptExecuteResult <T> .Success(data : (T)result));
}
private DynamicScriptExecuteResult <T> RunningDynamicScript <T>(DynamicScript dynamicScript)
{
//检查编译
if (!BuildDynamicScript(dynamicScript, out string errorMessage))
{
_logger.LogError($"Build Script Error ! Script Info:{JsonConvert.SerializeObject(dynamicScript)}");
return(DynamicScriptExecuteResult <T> .Error(errorMessage));
}
try
{
//是否开启执行分析,统计非常耗时且会带来更多GC开销，正常运行过程请关闭！
if (dynamicScript.IsExecutionStatistics)
{
Stopwatch stopwatch = new Stopwatch(); //程序执行时间
var startMemory = GC.GetTotalMemory(true); //方法调用内存占用
stopwatch.Start();
var result = CallFunction <T>(dynamicScript);
stopwatch.Stop();
result.TotalMemoryAllocated = GC.GetTotalMemory(true) - startMemory;
result.ProcessorTime = stopwatch.ElapsedMilliseconds;
return(result);
}
return(CallFunction <T>(dynamicScript));
}
catch (MissingMethodException missingMethod)
{
_logger.LogError(missingMethod, string.Format("TenantId:{0},FunctionName:{1},Language:{2},AppName:{3},ScriptHash:{4},ParameterCount:{5},ErrorMsg: {6}", _tenantId, dynamicScript.FunctionName, "CSharp", _currentAppName, _scriptHash, dynamicScript.Parameters?.Length, missingMethod.Message));
return(DynamicScriptExecuteResult <T> .Error($"function name can not be null."));
}
catch (Exception ex)
{
_logger.LogError(ex, string.Format("Script objectId:{0},tenantId:{1},appName:{2},functionName:{3},errorMsg:{4}", null, dynamicScript.TenantId, _currentAppName, dynamicScript.FunctionName, ex.Message));
return(DynamicScriptExecuteResult <T> .Error(ex.Message + ",innerEx:" + ex.InnerException?.Message));
}
}
public DynamicScriptExecuteResult CheckScript(DynamicScript dynamicScript)
{
ArgumentsCheck(dynamicScript);
PreProcessing(dynamicScript);
return(BuildDynamicScript(dynamicScript, out string errorMsg) ? DynamicScriptExecuteResult.Success() : DynamicScriptExecuteResult.Error(errorMsg));
}
