500 Custom Error Pages - sitecore

Question

I want to implement 500 error page for multi-sites/multi-languages, i am following this article.
But Application_Error in Global.asax is not firing. Here is my code:
<%# Application Language='C#' Inherits="Sitecore.ContentSearch.SolrProvider.CastleWindsorIntegration.WindsorApplication" %>
<script RunAt="server">
private void Application_Error(object sender, EventArgs e)
{
var customErrorsSection = (System.Web.Configuration.CustomErrorsSection)ConfigurationManager.GetSection("system.web/customErrors");
var lastException = Server.GetLastError();
if (customErrorsSection.Mode != System.Web.Configuration.CustomErrorsMode.Off)
{
try
{
// Log.Error( "There was an error in the application", lastException);
Server.ClearError();
HttpContext.Current.Response.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
Server.Transfer(string.Format("/Error/{0}_500.html", GetSafeLanguage()));
}
catch
{
}
}
}
private string GetSafeLanguage()
{
try
{
return Sitecore.Context.Language.CultureInfo.TwoLetterISOLanguageName;
}
catch
{
}
return string.Empty;
}
</script>

Answer 1

Since I am using SOLR, It needs WindsorApplication in Global.asax and this class not inherited from System.Web.HttpApplication, i follow these links to handle 500 page error :
https://sitecorecommerce.wordpress.com/2015/10/15/500-error-page-in-your-sitecore-application/
http://www.partechit.nl/en/blog/2014/01/sitecore-mvc-applications-and-the-application-error-event
Connfiguation :
<pipelines>
<mvc.exception>
<processor type="Sitecore.Mvc.Pipelines.MvcEvents.Exception.ShowAspNetErrorMessage, Sitecore.Mvc">
<patch:attribute name="type">MyWebsite.Web.Pipelines.HandleMvcException, MyWebsite.Web</patch:attribute>
</processor>
</mvc.exception>
</pipelines>
My Class
public class HandleMvcException : ExceptionProcessor
{
public override void Process(ExceptionArgs args)
{
var customErrorsSection = (CustomErrorsSection)ConfigurationManager.GetSection("system.web/customErrors");
var context = args.ExceptionContext;
var httpContext = context.HttpContext;
var exception = context.Exception;
if (customErrorsSection.Mode != CustomErrorsMode.Off)
{
if (context.ExceptionHandled || httpContext == null || exception == null)
{
return;
}
// Create a report with exception details.
string exceptionInfo = this.GetExceptionInfo(httpContext, exception);
// Store the report in a session variable so we can access it from the custom error page.
Log.Error(string.Format("There was an error in {0} : {1}", Sitecore.Context.Site.Name, exceptionInfo),this);
// Return a 500 status code and execute the custom error page.
httpContext.Server.ClearError();
httpContext.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
httpContext.Server.Execute((Sitecore.Context.Site.ErrorPage(GetSafeLanguage())));
}
}
private string GetExceptionInfo(HttpContextBase httpContext, Exception exception)
{
// Generate an error report.
var errorInfo = new StringBuilder();
errorInfo.AppendLine(string.Concat("URL: ", httpContext.Request.Url));
/* Snipped additional lines of report generation */
errorInfo.AppendLine(string.Concat("Source: ", exception.Source));
errorInfo.AppendLine(string.Concat("Message: ", exception.Message));
errorInfo.AppendLine(string.Concat("Stacktrace: ", exception.StackTrace));
return errorInfo.ToString();
}
private string GetSafeLanguage()
{
try
{
return Sitecore.Context.Language.CultureInfo.TwoLetterISOLanguageName;
}
catch
{
}
return string.Empty;
}
}
and in site definition i added custom attribute for error page :
<site name="mywebsite" patch:before="site[#name='website']" xdt:Transform="Replace" xdt:Locator="Match(name)"
hostName ="mywebsite.local"
virtualFolder="/"
physicalFolder="/"
rootPath="/sitecore/content/mywebsite"
startItem="/home"
database="web"
domain="extranet"
allowDebug="true"
cacheHtml="true"
htmlCacheSize="50MB"
enablePreview="true"
enableWebEdit="true"
enableDebugger="true"
disableClientData="false"
errorPage="/assets/error/mywebsite/{0}_500.html"/>
and I created extended method to read the errorPage attribute :
public static class SiteExtension
{
/// <summary>
/// Retrun the site unique ID
/// </summary>
/// <returns></returns>
public static string ErrorPage(this SiteContext site, string language)
{
try
{
string errorPage = site.Properties["errorPage"];
if (!String.IsNullOrEmpty(errorPage))
return string.Format(errorPage, language);
else
return string.Empty;
}
catch (Exception)
{
return string.Empty;
}
}
}