Showing "Spell Check Handler Server Error:500" in Firefox Browser

3 posts, 0 answers
  1. Karthik
    Karthik avatar
    2 posts
    Member since:
    Apr 2012

    Posted 17 Apr 2012 Link to this post

    I have using telerik spell checking. In the IE its working fine but in the firefox showing  error - "Spell Check Handler Server Error:500".

    The following step I have try.
    I have created RadSpell folder in App_Data

    I have included in Web.Config file
    <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" />
    <add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI" validate="false" />
    <add path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" validate="false"/>






    <modules runAllManagedModulesForAllRequests="true" />
    <validation validateIntegratedModeConfiguration="false" />
    <add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" />
    <add name="ChartImage.axd_*" path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler" preCondition="integratedMode" />
    <add name="Telerik.Web.UI.SpellCheckHandler.axd_*" path="Telerik.Web.UI.SpellCheckHandler.axd" verb="*" type="Telerik.Web.UI.SpellCheckHandler" preCondition="integratedMode" />
    <add name="Telerik.Web.UI.DialogHandler.aspx_*" path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler" preCondition="integratedMode" />
    <add name="Telerik.RadUploadProgressHandler.ashx_*" path="Telerik.RadUploadProgressHandler.ashx" verb="*" type="Telerik.Web.UI.Upload.RadUploadProgressHandler, Telerik.Web.UI" preCondition="integratedMode" />

    In the Bin folder I have included the following DLL

    Error Showing in alertbox:

    Spell Check Handler Server Error:500

            <title>A potentially dangerous Request.Form value was detected from the client (CommandArgument="...roke. sfd <br>").</title>
             body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;} 
             p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
             b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
             H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
             H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
             pre {font-family:"Lucida Console";font-size: .9em}
             .marker {font-weight: bold; color: black;text-decoration: none;}
             .version {color: gray;}
             .error {margin-bottom: 10px;}
             .expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }
        <body bgcolor="white">
                <span><H1>Server Error in '/EmailMarketing' Application.<hr width=100% size=1 color=silver></H1>
                <h2> <i>A potentially dangerous Request.Form value was detected from the client (CommandArgument="...roke. sfd <br>").</i> </h2></span>
                <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
                <b> Description: </b>Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted.  This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack.  To allow pages to override application request validation settings, set the requestValidationMode attribute in the httpRuntime configuration section to requestValidationMode="2.0". Example: <httpRuntime requestValidationMode="2.0" />. After setting this value, you can then disable request validation by setting validateRequest="false" in the Page directive or in the <pages> configuration section.  However, it is strongly recommended that your application explicitly check all inputs in this case.  For more information, see
                <b> Exception Details: </b>System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (CommandArgument="...roke. sfd <br>").<br><br>
                <b>Source Error:</b> <br><br>
                <table width=100% bgcolor="#ffffcc">
    An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>
                <b>Stack Trace:</b> <br><br>
                <table width=100% bgcolor="#ffffcc">
    [HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (CommandArgument="...roke. sfd <br>").]
       System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) +8730676
       System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, RequestValidationSource requestCollection) +122
       System.Web.HttpRequest.get_Form() +114
       Telerik.Web.UI.SpellCheckHandler.ProcessRequest(HttpContext context) +187
       System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100
       System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
                <hr width=100% size=1 color=silver>
                <b>Version Information:</b> Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
    [HttpRequestValidationException]: A potentially dangerous Request.Form value was detected from the client (CommandArgument="...roke. sfd <br>").
       at System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection)
       at System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, RequestValidationSource requestCollection)
       at System.Web.HttpRequest.get_Form()
       at Telerik.Web.UI.SpellCheckHandler.ProcessRequest(HttpContext context)
       at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
       at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
    This error page might contain sensitive information because ASP.NET is configured to show verbose error messages using <customErrors mode="Off"/>. Consider using <customErrors mode="On"/> or <customErrors mode="RemoteOnly"/> in production environments.-->
  2. Rumen
    Rumen avatar
    12788 posts

    Posted 19 Apr 2012 Link to this post


    You can see the following forum thread on the subject: Spell Check Handler Server Error: 500.

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  4. Karthik
    Karthik avatar
    2 posts
    Member since:
    Apr 2012

    Posted 30 Apr 2012 Link to this post

    Thanks for your reply

    I have fixed this problem. I have included below code in web.config file

    <httpRuntime requestValidationMode="2.0" />

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