Invalid viewstate for ScriptResource.axd?

Question

The Script Resource and the Web Resource files are generating intermittent errors in my application. I have been trying to chase the cause of the problem but to no avail. I notice that the “d” parameter that is passed is some how corrupted and I can’t for the life of me figure out what’s causing this parameter to be corrupted. I noticed that JavaScript code that in my application is some how getting intertwined with the hash code that’s generated for the “d” parameter.

Exception genereated on Monday, January 26, 2009, at 2:20 AM
Page location: /ScriptResource.axd?d=y9_dUwBeGqLlRpT5Dml1zhoQvfa7NKdj69EYuV771kzSsa5KOOXBfJZjk%20%20%20%20%20%20%20%20%20%20%20%20if%20(cat_gallery%20!=
Requested Url : http://garmn.factoryoutletstore.com/ScriptResource.axd?d=y9_dUwBeGqLlRpT5Dml1zhoQvfa7NKdj69EYuV771kzSsa5KOOXBfJZjk if (cat_gallery !=
Message: Exception has been thrown by the target of an invocation.
Source: mscorlib
Method: System.Object _InvokeMethodFast(System.Object, System.Object[], System.SignatureStruct ByRef, System.Reflection.MethodAttributes, System.RuntimeTypeHandle)
Stack Trace: at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) at System.Web.Handlers.ScriptResourceHandler.DecryptString(String s) at System.Web.Handlers.ScriptResourceHandler.DecryptParameter(NameValueCollection queryString) at System.Web.Handlers.ScriptResourceHandler.ProcessRequest(HttpContext context) at System.Web.Handlers.ScriptResourceHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Inner Exception: System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType) at System.Web.UI.Page.DecryptString(String s)
User IP: 74.34.62.187

BaseMessage : Exception genereated on Monday, January 26, 2009, at 2:20 AM
Page location: /ScriptResource.axd?d=y9_dUwBeGqLlRpT5Dml1zhoQvfa7NKdj69EYuV771kzSsa5KOOXBfJZjk%20%20%20%20%20%20%20%20%20%20%20%20if%20(cat_gallery%20!=
Requested Url : http://garmn.factoryoutletstore.com/ScriptResource.axd?d=y9_dUwBeGqLlRpT5Dml1zhoQvfa7NKdj69EYuV771kzSsa5KOOXBfJZjk if (cat_gallery !=
Message: Invalid viewstate.
Source: System.Web
Method: System.String DecryptStringWithIV(System.String, System.Web.Configuration.IVType)
Stack Trace: at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType) at System.Web.UI.Page.DecryptString(String s)
User IP: 74.34.62.187
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 1.1.4322; Zune 3.0)

Answer 1

We've experienced the same and it appears to be related to a bug in IE8's rendering engine.

Take a look at the following resources: http://blogs.msdn.com/ieinternals/archive/2009/07/27/Bugs-in-the-IE8-Lookahead-Downloader.aspx http://connect.microsoft.com/IE/feedback/ViewFeedback.aspx?FeedbackID=467062

Basically there are a few tags on the page that are causing a "parser restart" which causes 4K of the HTML in the page to be omitted. This means that the browser is putting HTML on to the ScriptResource.axd that occurs 4096 bytes later in the page.