private ResultExecutedContext InvokeActionResultFilterRecursive(IList <IResultFilter> filters, int filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
{
// Performance-sensitive
// For compatbility, the following behavior must be maintained
// The OnResultExecuting events must fire in forward order
// The InvokeActionResult must then fire
// The OnResultExecuted events must fire in reverse order
// Earlier filters can process the results and exceptions from the handling of later filters
// This is achieved by calling recursively and moving through the filter list forwards
// If there are no more filters to recurse over, create the main result
if (filterIndex > filters.Count - 1)
{
InvokeActionResult(controllerContext, actionResult);
return(new ResultExecutedContext(controllerContext, actionResult, canceled: false, exception: null));
}
// Otherwise process the filters recursively
IResultFilter filter = filters[filterIndex];
filter.OnResultExecuting(preContext);
if (preContext.Cancel)
{
return(new ResultExecutedContext(preContext, preContext.Result, canceled: true, exception: null));
}
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
// Use the filters in forward direction
int nextFilterIndex = filterIndex + 1;
postContext = InvokeActionResultFilterRecursive(filters, nextFilterIndex, preContext, controllerContext, actionResult);
}
catch (ThreadAbortException)
{
// This type of exception occurs as a result of Response.Redirect(), but we special-case so that
// the filters don't see this as an error.
postContext = new ResultExecutedContext(preContext, preContext.Result, canceled: false, exception: null);
filter.OnResultExecuted(postContext);
throw;
}
catch (Exception ex)
{
wasError = true;
postContext = new ResultExecutedContext(preContext, preContext.Result, canceled: false, exception: ex);
filter.OnResultExecuted(postContext);
if (!postContext.ExceptionHandled)
{
throw;
}
}
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return(postContext);
}
private static ResultExecutedContext InvokeActionResultFilter(IResultFilter filter,
ResultExecutionContext context, Func <ResultExecutedContext> continuation)
{
filter.OnResultExecuting(context);
if (context.Cancel)
{
return(new ResultExecutedContext(context, null));
}
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
postContext = continuation();
}
catch (ThreadAbortException)
{
// This type of exception occurs as a result of Response.Redirect(), but we special-case so that
// the filters don't see this as an error.
postContext = new ResultExecutedContext(context, null);
filter.OnResultExecuted(postContext);
throw;
}
catch (Exception ex)
{
wasError = true;
postContext = new ResultExecutedContext(context, ex);
filter.OnResultExecuted(postContext);
if (!postContext.ExceptionHandled)
{
throw;
}
}
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return(postContext);
}
private static async Task ExecuteSyncFilter(
ResultExecutingContext context,
ResultExecutionDelegate next,
IResultFilter resultFilter)
{
resultFilter.OnResultExecuting(context);
if (!context.Cancel)
{
resultFilter.OnResultExecuted(await next());
}
}
/// <summary>
/// Execute the prefilter result, the actionResult and the postfilter result
/// </summary>
/// <param name="filter">The result filter</param>
/// <param name="preContext">The builded preContext</param>
/// <param name="continuation">The lambda expression wich execute the actionResult and the post filter result attribute</param>
/// <returns>The result of the execution of the post filter result attribute</returns>
private ResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func <ResultExecutedContext> continuation)
{
//Executing the filter
filter.OnResultExecuting(preContext);
//If the execution is cancelled
if (preContext.Cancel)
{
return(new ResultExecutedContext(preContext.Controller, preContext.Result, true /* canceled */, null /* exception */));
}
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
//Creating the ResultExecutedContext by executing the actionResult
postContext = continuation();
}
catch (Exception ex)
{
wasError = true;
//Creating the context
postContext = new ResultExecutedContext(preContext.Controller, preContext.Result, false /* canceled */, ex);
filter.OnResultExecuted(postContext);
//If the exception is !handled we throw it
if (!postContext.ExceptionHandled)
{
throw;
}
}
//Everything is executed well
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return(postContext);
}
internal static ModuleResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func <ModuleResultExecutedContext> continuation)
{
filter.OnResultExecuting(preContext);
if (preContext.Cancel)
{
return(new ModuleResultExecutedContext(preContext, preContext.Result, true /* canceled */, null /* exception */, ""));
}
bool wasError = false;
ModuleResultExecutedContext postContext = null;
try
{
postContext = continuation();
}
catch (ThreadAbortException)
{
// This type of exception occurs as a result of Response.Redirect(), but we special-case so that
// the filters don't see this as an error.
postContext = new ModuleResultExecutedContext(preContext, preContext.Result, false /* canceled */, null /* exception */, "");
filter.OnResultExecuted(postContext);
throw;
}
catch (Exception ex)
{
wasError = true;
postContext = new ModuleResultExecutedContext(preContext, preContext.Result, false /* canceled */, ex, "");
filter.OnResultExecuted(postContext);
if (!postContext.ExceptionHandled)
{
throw;
}
}
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return(postContext);
}
/// <summary>
/// 执行请求结果的筛选器
/// </summary>
/// <param name="filter"></param>
/// <param name="preContext"></param>
/// <param name="continuation"></param>
/// <returns></returns>
internal static ResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func <ResultExecutedContext> continuation)
{
filter.OnResultExecuting(preContext);
if (preContext.Cancel)
{
return(new ResultExecutedContext(preContext, preContext.Result, true, null));
}
bool flag = false;
ResultExecutedContext resultExecutedContext = null;
try
{
resultExecutedContext = continuation();
}
catch (ThreadAbortException)
{
resultExecutedContext = new ResultExecutedContext(preContext, preContext.Result, false, null);
filter.OnResultExecuted(resultExecutedContext);
throw;
}
catch (Exception exception)
{
flag = true;
resultExecutedContext = new ResultExecutedContext(preContext, preContext.Result, false, exception);
filter.OnResultExecuted(resultExecutedContext);
if (!resultExecutedContext.ExceptionHandled)
{
throw;
}
}
if (!flag)
{
filter.OnResultExecuted(resultExecutedContext);
}
return(resultExecutedContext);
}
void ProcessExceptionWhenInvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Exception ex)
{
//Creating the context
var postContext = new ResultExecutedContext(preContext.Result, false /* canceled */, ex)
{
Controller = preContext.Controller,
ActionParameters = preContext.ActionParameters,
ActionMethod = _actionMethod
};
filter.OnResultExecuted(postContext);
//If the exception is !handled we throw it
if (!postContext.ExceptionHandled)
{
throw ex;
}
}
/// <summary>
/// Execute the prefilter result, the actionResult and the postfilter result
/// </summary>
/// <param name="filter">The result filter</param>
/// <param name="preContext">The builded preContext</param>
/// <param name="continuation">The lambda expression wich execute the actionResult and the post filter result attribute</param>
/// <returns>The result of the execution of the post filter result attribute</returns>
ResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Delegates.Func <ResultExecutedContext> continuation)
{
//Executing the filter
filter.OnResultExecuting(preContext);
//If the execution is cancelled
if (preContext.Cancel)
{
return(new ResultExecutedContext(preContext.Result, true /* canceled */, null /* exception */)
{
Controller = preContext.Controller,
ActionParameters = preContext.ActionParameters,
ActionMethod = _actionMethod
});
}
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
//Creating the ResultExecutedContext by executing the actionResult
postContext = continuation();
}
catch (TargetInvocationException ex)
{
wasError = true;
ProcessExceptionWhenInvokeActionResultFilter(filter, preContext, ex.InnerException ?? ex);
}
catch (Exception ex)
{
wasError = true;
ProcessExceptionWhenInvokeActionResultFilter(filter, preContext, ex);
}
//Everything is executed well
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return(postContext);
}
internal static ResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func<ResultExecutedContext> continuation)
{
filter.OnResultExecuting(preContext);
if (preContext.Cancel)
{
return new ResultExecutedContext(preContext, preContext.Result, true /* canceled */, null /* exception */);
}
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
postContext = continuation();
}
catch (ThreadAbortException)
{
// This type of exception occurs as a result of Response.Redirect(), but we special-case so that
// the filters don't see this as an error.
postContext = new ResultExecutedContext(preContext, preContext.Result, false /* canceled */, null /* exception */);
filter.OnResultExecuted(postContext);
throw;
}
catch (Exception ex)
{
wasError = true;
postContext = new ResultExecutedContext(preContext, preContext.Result, false /* canceled */, ex);
filter.OnResultExecuted(postContext);
if (!postContext.ExceptionHandled)
{
throw;
}
}
if (!wasError)
{
filter.OnResultExecuted(postContext);
}
return postContext;
}
public void OnResultExecuted(ResultExecutedContext filterContext)
{
_wrappedFilter.OnResultExecuted(filterContext);
}
private static ResultExecutedContext InvokeActionResultFilter(IResultFilter filter,
ResultExecutionContext context, Func<ResultExecutedContext> continuation)
{
filter.OnResultExecuting(context);
if (context.Cancel)
return new ResultExecutedContext(context, null);
bool wasError = false;
ResultExecutedContext postContext = null;
try
{
postContext = continuation();
}
catch (ThreadAbortException)
{
// This type of exception occurs as a result of Response.Redirect(), but we special-case so that
// the filters don't see this as an error.
postContext = new ResultExecutedContext(context, null);
filter.OnResultExecuted(postContext);
throw;
}
catch (Exception ex)
{
wasError = true;
postContext = new ResultExecutedContext(context, ex);
filter.OnResultExecuted(postContext);
if (!postContext.ExceptionHandled)
throw;
}
if (!wasError)
filter.OnResultExecuted(postContext);
return postContext;
}