/// <summary>
/// Allows overriding of DisplayError
/// </summary>
/// <param name="error"></param>
/// <param name="model"></param>
protected virtual void OnDisplayError(WebErrorHandler error, ErrorViewModel model)
{
if (DisplayError != null)
{
DisplayError(error, model);
}
}
/// <summary>
/// Semi generic Application_Error handler method that can be used
/// to handle errors without additional code. You should implement
/// the DisplayError event and LogError Event methods to display
/// a message when ErrorHandlingModes is not Default
/// </summary>
/// <param name="errorHandlingMode"></param>
public void HandleError(ErrorHandlingModes errorHandlingMode = ErrorHandlingModes.Default)
{
var context = HttpContext.Current;
var Response = context.Response;
var Server = context.Server;
if (Response.Filter != null)
{
var f = Response.Filter;
f = null; // REQUIRED! - w/o this null setting doesn't work
Response.Filter = null;
}
var ex = Server.GetLastError().GetBaseException();
OriginalHttpStatusCode = 500;
if (ex is HttpException)
{
var httpException = (HttpException)ex;
OriginalHttpStatusCode = httpException.GetHttpCode();
}
var errorHandler = new WebErrorHandler(ex);
errorHandler.RetrieveSourceLines = this.RetrieveSourceLines;
errorHandler.Parse();
if (LogManagerConfiguration.Current.LogErrors &&
// don't log URL link errors
OriginalHttpStatusCode < 400 || OriginalHttpStatusCode > 410)
{
OnLogError(errorHandler, LastException);
}
var model = new ErrorViewModel();
model.Title = Resources.AnErrorOccurredInYourApplication;
model.Message = errorHandler.ErrorMessage;
model.WebErrorHandler = errorHandler;
model.ErrorHandlingMode = errorHandlingMode;
if (errorHandlingMode == ErrorHandlingModes.Default)
{
// return default ASP.NET error screen behavior
// Yellow Screen of Death or ASP.NET DisplayErrors form
Response.TrySkipIisCustomErrors = true;
return;
}
Response.ClearContent();
Response.ClearHeaders();
Server.ClearError();
Response.TrySkipIisCustomErrors = true;
Response.ContentType = "text/html";
Response.StatusCode = 500;
OnDisplayError(errorHandler, model);
}
/// <summary>
/// Allows overriding for logging error information in a subclass
/// </summary>
/// <param name="error"></param>
/// <param name="ex"></param>
protected virtual void OnLogError(WebErrorHandler error, Exception ex)
{
if (LogError != null)
{
LogError(error, ex);
}
}
void context_Error(object sender, EventArgs e)
{
var handler = new WebErrorHandler();
handler.LogError += OnLogError;
handler.DisplayError += OnDisplayError;
handler.HandleError(ErrorHandlingMode);
}
void context_Error(object sender, EventArgs e)
{
var handler = new WebErrorHandler();
handler.LogError += OnLogError;
handler.DisplayError += OnDisplayError;
handler.HandleError(ErrorHandlingMode);
}
public string ErrorHandler()
{
try
{
string x = null;
x.ToString();
}
catch (Exception ex)
{
var eh = new WebErrorHandler(ex);
return eh.ToString();
}
return null;
}
/// <summary>
/// Override this method to handle logging of errors. Gets passed
/// the WebErrorHandler instance that is fully parsed and filled
/// with the error and Http request data.
/// </summary>
/// <param name="errorHandler">Contains formatted error and request information</param>
/// <param name="ex">The original exception that caused the error</param>
protected virtual void OnLogError(WebErrorHandler errorHandler, Exception ex)
{
}
/// <summary>
/// Override this method to handle displaying of error information.
/// You can write to the HTTP output stream. If using MVC you can
/// use the Westwind.Web.ViewRenderer class to easily display an
/// MVC view.
/// </summary>
/// <param name="errorHandler">Contains error and request information</param>
/// <param name="model">
/// Model that contains a few simple properties like title and message
/// as well as an instance of the errorHandler object passed in to allow
/// for error pages that can provide a wealth of detail if desired.
/// </param>
protected virtual void OnDisplayError(WebErrorHandler errorHandler, ErrorViewModel model)
{
}
/// <summary>
/// Semi generic Application_Error handler method that can be used
/// to handle errors without additional code. You should implement
/// the DisplayError event and LogError Event methods to display
/// a message when ErrorHandlingModes is not Default
/// </summary>
/// <param name="errorHandlingMode"></param>
public void HandleError(ErrorHandlingModes errorHandlingMode = ErrorHandlingModes.Default)
{
var context = HttpContext.Current;
var Response = context.Response;
var Server = context.Server;
if (Response.Filter != null)
{
var f = Response.Filter;
f = null; // REQUIRED - w/o this null setting doesn't work
Response.Filter = null;
}
var ex = Server.GetLastError().GetBaseException();
OriginalHttpStatusCode = 500;
if (ex is HttpException)
{
var httpException = (HttpException)ex;
OriginalHttpStatusCode = httpException.GetHttpCode();
}
var errorHandler = new WebErrorHandler(ex);
errorHandler.Parse();
if (LogManagerConfiguration.Current.LogErrors &&
OriginalHttpStatusCode < 400 || OriginalHttpStatusCode > 410)
{
OnLogError(errorHandler, LastException);
}
var model = new ErrorViewModel();
model.WebErrorHandler = this;
model.ErrorHandlingMode = errorHandlingMode;
if (errorHandlingMode == ErrorHandlingModes.Default)
{
// return default ASP.NET error screen behavior
// Yellow Screen of Death or ASP.NET DisplayErrors form
Response.TrySkipIisCustomErrors = true;
return;
}
//if (errorHandlingMode == ErrorHandlingModes.DeveloperErrorMessage)
//{
// model.Message = errorHandler.ToString();
// model.MessageIsHtml = true;
//}
//else if (errorHandlingMode == ErrorHandlingModes.ApplicationErrorMessage)
//{
// // do nothing - already got our message
//}
Response.ClearContent();
Response.ClearHeaders();
Server.ClearError();
Response.TrySkipIisCustomErrors = true;
Response.ContentType = "text/html";
Response.StatusCode = 500;
OnDisplayError(errorHandler, model);
}
/// <summary>
/// Allows overriding of DisplayError
/// </summary>
/// <param name="error"></param>
/// <param name="model"></param>
protected virtual void OnDisplayError(WebErrorHandler error, ErrorViewModel model)
{
if (DisplayError != null)
DisplayError(error, model);
}
/// <summary>
/// Allows overriding for logging error information in a subclass
/// </summary>
/// <param name="error"></param>
/// <param name="ex"></param>
protected virtual void OnLogError(WebErrorHandler error, Exception ex)
{
if (LogError != null)
LogError(error, ex);
}
/// <summary>
/// Semi generic Application_Error handler method that can be used
/// to handle errors without additional code. You should implement
/// the DisplayError event and LogError Event methods to display
/// a message when ErrorHandlingModes is not Default
/// </summary>
/// <param name="errorHandlingMode"></param>
public void HandleError(ErrorHandlingModes errorHandlingMode = ErrorHandlingModes.Default)
{
var context = HttpContext.Current;
var Response = context.Response;
var Server = context.Server;
if (Response.Filter != null)
{
var f = Response.Filter;
f = null; // REQUIRED! - w/o this null setting doesn't work
Response.Filter = null;
}
var ex = Server.GetLastError().GetBaseException();
OriginalHttpStatusCode = 500;
if (ex is HttpException)
{
var httpException = (HttpException)ex;
OriginalHttpStatusCode = httpException.GetHttpCode();
}
var errorHandler = new WebErrorHandler(ex);
errorHandler.RetrieveSourceLines = this.RetrieveSourceLines;
errorHandler.Parse();
if (LogManagerConfiguration.Current.LogErrors &&
// don't log URL link errors
OriginalHttpStatusCode < 400 || OriginalHttpStatusCode > 410)
{
OnLogError(errorHandler, LastException);
}
var model = new ErrorViewModel();
model.Title = Resources.AnErrorOccurredInYourApplication;
model.Message = errorHandler.ErrorMessage;
model.WebErrorHandler = errorHandler;
model.ErrorHandlingMode = errorHandlingMode;
if (errorHandlingMode == ErrorHandlingModes.Default)
{
// return default ASP.NET error screen behavior
// Yellow Screen of Death or ASP.NET DisplayErrors form
Response.TrySkipIisCustomErrors = true;
return;
}
Response.ClearContent();
Response.ClearHeaders();
Server.ClearError();
Response.TrySkipIisCustomErrors = true;
Response.ContentType = "text/html";
Response.StatusCode = 500;
OnDisplayError(errorHandler, model);
}
/// <summary>
/// Override this method to handle logging of errors. Gets passed
/// the WebErrorHandler instance that is fully parsed and filled
/// with the error and Http request data.
/// </summary>
/// <param name="errorHandler">Contains formatted error and request information</param>
/// <param name="ex">The original exception that caused the error</param>
protected virtual void OnLogError(WebErrorHandler errorHandler, Exception ex)
{
}
/// <summary>
/// Override this method to handle displaying of error information.
/// You can write to the HTTP output stream. If using MVC you can
/// use the Westwind.Web.ViewRenderer class to easily display an
/// MVC view.
/// </summary>
/// <param name="errorHandler">Contains error and request information</param>
/// <param name="model">
/// Model that contains a few simple properties like title and message
/// as well as an instance of the errorHandler object passed in to allow
/// for error pages that can provide a wealth of detail if desired.
/// </param>
protected virtual void OnDisplayError(WebErrorHandler errorHandler, ErrorViewModel model)
{
}
protected void Application_Error()
{
try
{
Exception serverException = Server.GetLastError();
WebErrorHandler errorHandler;
// Try to log the inner Exception since that's what
// contains the 'real' error.
if (serverException.InnerException != null)
serverException = serverException.InnerException;
errorHandler = new WebErrorHandler(serverException);
// MUST clear out any previous response in case error occurred in a view
// that already started rendering
Response.Clear();
// Log the error if specified
if (LogManagerConfiguration.Current.LogErrors)
{
errorHandler.Parse();
//try
//{
WebLogEntry entry = new WebLogEntry(serverException, this.Context);
entry.Details = errorHandler.ToString();
LogManager.Current.WriteEntry(entry);
//}
//catch { /* Log Error shouldn't kill the error handler */ }
}
// Retrieve the detailed String information of the Error
string ErrorDetail = errorHandler.ToString();
// Optionally email it to the Admin contacts set up in WebStoreConfig
if (!string.IsNullOrEmpty(App.Configuration.ErrorEmailAddress))
AppWebUtils.SendAdminEmail(App.Configuration.ApplicationTitle + "Error: " + Request.RawUrl, ErrorDetail, "",
App.Configuration.ErrorEmailAddress);
// Debug modes handle different error display mechanisms
// Default - default ASP.Net - depends on web.config settings
// Developer - display a generic application error message with no error info
// User - display a detailed error message with full error info independent of web.config setting
if (App.Configuration.DebugMode == DebugModes.DeveloperErrorMessage)
{
Server.ClearError();
Response.TrySkipIisCustomErrors = true;
ErrorController.ShowErrorPage("Application Error", "<div class='codedisplay'><pre id='Code'>" + HttpUtility.HtmlEncode(ErrorDetail) + "</pre></div>");
return;
}
else if (App.Configuration.DebugMode == DebugModes.ApplicationErrorMessage)
{
string StockMessage =
"The Server Administrator has been notified and the error logged.<p>" +
"Please continue by either clicking the back button or by returning to the home page.</p>" +
"<p><b><a href='" + Request.ApplicationPath + "'>Click here to continue...</a></b></p>";
// Handle some stock errors that may require special error pages
HttpException httpException = serverException as HttpException;
if (httpException != null)
{
int HttpCode = httpException.GetHttpCode();
Server.ClearError();
if (HttpCode == 404) // Page Not Found
{
Response.StatusCode = 404;
ErrorController.ShowErrorPage("Page not found",
"You've accessed an invalid page on this Web server. " +
StockMessage,null);
return;
}
if (HttpCode == 401) // Access Denied
{
Response.StatusCode = 401;
ErrorController.ShowErrorPage("Access Denied",
"You've accessed a resource that requires a valid login. " +
StockMessage);
return;
}
}
// Display a generic error message
Server.ClearError();
Response.StatusCode = 500;
Response.TrySkipIisCustomErrors = true;
ErrorController.ShowErrorPage("Application Error",
"We're sorry, but an unhandled error occurred on the server. " +
StockMessage);
return;
}
return;
}
catch (Exception ex)
{
// Failure in the attempt to report failure - try to email
if (!string.IsNullOrEmpty(App.Configuration.ErrorEmailAddress))
{
AppWebUtils.SendAdminEmail(App.Configuration.ApplicationTitle + "Error: " + Request.RawUrl,
"Application_Error failed!\r\n\r\n" +
ex.ToString(), "",App.Configuration.ErrorEmailAddress);
}
// and display an error message
Server.ClearError();
Response.StatusCode = 500;
Response.TrySkipIisCustomErrors = true;
ErrorController.ShowErrorPage("Application Error Handler Failed",
"The application Error Handler failed with an exception." +
(App.Configuration.DebugMode == DebugModes.DeveloperErrorMessage ? "<pre>" + ex.ToString() + "</pre>" : ""),null);
}
}
