private void ProcessActionException(IContext context, PageAction action, Exception ex)
{
XrcUrl errorPage = context.Page.GetPageUrl(action.CatchException.Url.ToLower());
var errorContent = Page(errorPage, new { Exception = ex }, context);
// TODO If there is already some content on the stream? An exception can occurs when some content is already written... Think if this is acceptable.
context.Response.Write(errorContent.Content);
}
private void RenderLayout(IContext childContext, PageAction childAction, Dictionary<string, object> childModules)
{
XrcResponse currentResponse = childContext.Response;
// If a parent is defined call first it using the current response
// and defining a SlotCallback event that output the current slot inline.
// The event will be called from the layout action by using Cms.Slot().
// Parameters will be also copied from slot to layout.
XrcUrl layoutPage = childContext.Page.GetPageUrl(childAction.Layout.ToLower());
Context layoutContext = new Context(new XrcRequest(layoutPage, parentRequest: childContext.Request), currentResponse);
layoutContext.CallerContext = childContext;
foreach (var item in childContext.Parameters)
layoutContext.Parameters.Add(new ContextParameter(item.Name, item.Type, item.Value));
layoutContext.SlotCallback = (s, e) =>
{
var childResult = new StringResult();
using (MemoryStream stream = new MemoryStream())
{
XrcResponse response = new XrcResponse(stream, parentResponse: currentResponse);
childContext.Response = response;
ViewDefinition viewDefinition = childAction.Views[e.Name];
if (viewDefinition != null)
ExecuteView(childContext, childAction, viewDefinition, childModules);
else
throw new ApplicationException(string.Format("Slot '{0}' not found.", e.Name));
childResult.ContentEncoding = response.ContentEncoding;
childResult.ContentType = response.ContentType;
response.Flush();
stream.Seek(0, SeekOrigin.Begin);
using (StreamReader reader = new StreamReader(stream, response.ContentEncoding))
{
childResult.Content = reader.ReadToEnd();
}
}
e.Result = childResult;
};
try
{
ProcessRequest(layoutContext);
layoutContext.CheckResponse();
}
catch (Exception ex)
{
// Set a generic status code. We don't want to expose directly parent StatusCode like redirect
// otherwise the client is redirected to a wrong page (the parent page).
currentResponse.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
throw new PageException(layoutPage.ToString(), ex);
}
}
private void ExecuteView(IContext context, PageAction action, ViewDefinition viewDefinition, Dictionary<string, object> modules)
{
IView view = _viewFactory.Get(viewDefinition.Component, context);
try
{
foreach (var property in viewDefinition.Properties)
{
object value = _scriptService.Eval(property.Value, modules, context.Parameters);
property.PropertyInfo.SetValue(view, value, null);
}
view.Execute(context);
}
catch (Exception ex)
{
if (action.CatchException != null)
ProcessActionException(context, action, ex);
else
throw;
}
finally
{
_viewFactory.Release(view);
}
}