godaddy上使用MySQL和实体框架的安全异常

在godaddy上使用实体框架时，我们得到了一个

SecurityException

。该实体已针对MySQL存储配置。（6.1.2节）有点奇怪，但有个例外。。。从异常堆栈来看，这似乎意味着如果我们在站点的任何地方打开到MySQL的连接，那么我们应该得到相同的异常；然而，直接打开MySQL连接似乎在站点的另一部分起作用

以下是验证：

using (MySqlConnection connection = new MySqlConnection(ConnectionString))
{
  connection.Open();
  ...
}

有人遇到过类似的问题吗

完整的错误堆栈跟踪如下所示：

[SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
   System.Reflection.MethodBase.PerformSecurityCheck(Object obj, RuntimeMethodHandle method, IntPtr parent, UInt32 invocationFlags) +0
   System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +470
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +1051
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +111
   System.Resources.ResourceManager.CreateResourceSet(Stream store, Assembly assembly) +357
   System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents) +471
   System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents) +583
   System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents) +583
   System.Resources.ResourceManager.GetString(String name, CultureInfo culture) +74
   MySql.Data.MySqlClient.Resources.get_PerfMonCategoryName() +40
   MySql.Data.MySqlClient.PerformanceMonitor..ctor(MySqlConnection connection) +43
   MySql.Data.MySqlClient.MySqlConnection.Open() +434
   System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure) +173
   System.Data.EntityClient.EntityConnection.Open() +96
   System.Data.Objects.ObjectContext.EnsureConnection() +81
   System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +46
   System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() +44
   jet.Controllers.WorkOrder.WorkOrderView..ctor() +219
   jet.Controllers.WorkOrder.WorkOrderView.get_Instance() +29
   jet.Controllers.WorkItemController.Index() +11
   lambda_method(ExecutionScope , ControllerBase , Object[] ) +39
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +178
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +24
   System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +53
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +258
   System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +20
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +193
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +382
   System.Web.Mvc.Controller.ExecuteCore() +123
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +23
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +144
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +54
   System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +7
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

[安全例外：请求'System.Security.Permissions.SecurityPermission，mscorlib，版本=2.0.0.0，区域性=neutral，PublicKeyToken=b77a5c561934e089'类型的权限失败。]
System.Reflection.MethodBase.PerformSecurityCheck（对象obj、RuntimeMethodHandle方法、IntPtr父级、UInt32调用标志）+0
System.Reflection.RuntimeConstructorInfo.Invoke（BindingFlags invokeAttr，Binder Binder，Object[]参数，CultureInfo区域性）+470
System.RuntimeType.CreateInstanceImpl（BindingFlags bindingAttr、Binder Binder、Object[]args、CultureInfo区域性、Object[]activationAttributes）+1051
System.Activator.CreateInstance（类型类型、BindingFlags bindingAttr、Binder Binder、对象[]参数、CultureInfo区域性、对象[]activationAttributes）+111
System.Resources.ResourceManager.CreateResourceSet（流存储、程序集）+357
System.Resources.ResourceManager.InternalGetResourceSet（CultureInfo区域性，布尔createIfNotExists，布尔tryParents）+471
System.Resources.ResourceManager.InternalGetResourceSet（CultureInfo区域性，布尔createIfNotExists，布尔tryParents）+583
System.Resources.ResourceManager.InternalGetResourceSet（CultureInfo区域性，布尔createIfNotExists，布尔tryParents）+583
System.Resources.ResourceManager.GetString（字符串名称，CultureInfo区域性）+74
MySql.Data.MySqlClient.Resources.get_PerfMonCategoryName（）+40
MySql.Data.MySqlClient.PerformanceMonitor..ctor（MySqlConnection）+43
MySql.Data.MySqlClient.MySqlConnection.Open（）+434
System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf（布尔openCondition、DbConnection StoreConnectionOpen、DbConnection originalConnection、字符串例外代码、字符串尝试操作、布尔和closeStoreConnectionOnFailure）+173
System.Data.EntityClient.EntityConnection.Open（）+96
System.Data.Objects.ObjectContext.EnsureReconnection（）+81
System.Data.Objects.ObjectQuery`1.GetResults（可为null`1 forMergeOption）+46
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable.GetEnumerator（）+44
jet.Controller.WorkOrder.WorkOrderView..ctor（）+219
jet.Controllers.WorkOrder.WorkOrderView.get_Instance（）+29
jet.Controllers.WorkItemController.Index（）+11
lambda_方法（ExecutionScope，ControllerBase，Object[]）+39
System.Web.Mvc.ActionMethodDispatcher.Execute（ControllerBase控制器，对象[]参数）+17
System.Web.Mvc.ReflectedActionDescriptor.Execute（ControllerContext ControllerContext，IDictionary`2参数）+178
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext ControllerContext，ActionDescriptor ActionDescriptor，IDictionary`2参数）+24
System.Web.Mvc.c__显示ClassA.b__7（）+53
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter（IActionFilter筛选器、ActionExecutingContext预文本、Func`1 continuation）+258
System.Web.Mvc.c__显示类c.b__9（）+20
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters（ControllerContext ControllerContext，IList`1筛选器，ActionDescriptor ActionDescriptor，IDictionary`2参数）+193
System.Web.Mvc.ControllerActionInvoker.InvokeAction（ControllerContext ControllerContext，String actionName）+382
System.Web.Mvc.Controller.ExecuteCore（）+123
System.Web.Mvc.ControllerBase.Execute（RequestContext-RequestContext）+23
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute（RequestContext RequestContext）+7
ProcessRequest（HttpContextBase httpContext）+144
ProcessRequest（HttpContext HttpContext）+54
System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest（HttpContext HttpContext）+7
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+181
System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+75

奇怪的一个。GoDaddy共享托管ASP.NET应用程序在中等信任下执行，并且性能计数器创建可能需要完全信任，但性能计数器创建并不是这里失败的地方。（如果失败，它将不会传播出去，因为perf coutner创建异常会被mySQL客户端代码吞没）

相反，它在创建性能计数器之前尝试访问字符串资源失败。MySQL客户端的Resources.Designer.cs中的这行代码失败：

return ResourceManager.GetString("PerfMonCategoryName", resourceCulture)

按照难度递增的顺序，尝试以下几件事：

确保你的应用程序的BIN目录中有MySQL客户端DLL，并且你没有试图从GoDaddy的GAC中加载客户端DLL。如果可以避免的话，永远不要依赖GoDaddy提供的二进制文件

切换到EN-US区域性，这样客户端就不必去寻找另一个资源DLL，看看问题是否消失了

从源代码构建.NET客户端，而不是将DLL从二进制发行版复制到应用程序的BIN目录中。这将使类似这样的问题更容易调试，因为mySQL代码不会是一个黑盒。而且，在紧急情况下，将允许您更改有问题的资源获取调用（或硬编码区域设置）！：-）

顺便说一句，如果您试图在连接字符串中设置“Use Performance Monitor=false”以试图回避问题，请不要费心。问题

    public PerformanceMonitor(MySqlConnection connection)
    {
        this.connection = connection;

        //// this line is where it bombs
        string categoryName = Resources.PerfMonCategoryName;

        //// this line is affected by connection string setting
        if (connection.Settings.UsePerformanceMonitor && procedureHardQueries == null)
        {
            try
            {
                procedureHardQueries = new PerformanceCounter(categoryName,
                                                              "HardProcedureQueries", false);
                procedureSoftQueries = new PerformanceCounter(categoryName,
                                                              "SoftProcedureQueries", false);
            }
            catch (Exception ex)
            {
                Logger.LogException(ex);
            }
        }
    }

<configuration>
  ...
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d"/>
        <bindingRedirect oldVersion="5.0.7.0" newVersion="6.1.2.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  ...
</configuration>