private static SaveTempDataContext GetTempDataContext(HttpContext httpContext)
{
SaveTempDataContext saveTempDataContext = null;
if (httpContext.Items.TryGetValue(SaveTempDataFilterContextKey, out var value))
{
saveTempDataContext = (SaveTempDataContext)value;
}
return(saveTempDataContext);
}
/// <inheritdoc />
public void OnResourceExecuting(ResourceExecutingContext context)
{
if (!context.HttpContext.Items.ContainsKey(SaveTempDataFilterContextKey))
{
var tempDataContext = new SaveTempDataContext()
{
Filters = context.Filters,
TempDataDictionaryFactory = _factory
};
context.HttpContext.Items.Add(SaveTempDataFilterContextKey, tempDataContext);
}
if (!context.HttpContext.Response.HasStarted)
{
context.HttpContext.Response.OnStarting((state) =>
{
var httpContext = (HttpContext)state;
var saveTempDataContext = GetTempDataContext(context.HttpContext);
if (saveTempDataContext.RequestHasUnhandledException)
{
return(Task.CompletedTask);
}
// If temp data was already saved, skip trying to save again as the calls here would potentially fail
// because the session feature might not be available at this point.
// Example: An action returns NoContentResult and since NoContentResult does not write anything to
// the body of the response, this delegate would get executed way late in the pipeline at which point
// the session feature would have been removed.
if (saveTempDataContext.TempDataSaved)
{
return(Task.CompletedTask);
}
SaveTempData(
result: null,
factory: saveTempDataContext.TempDataDictionaryFactory,
filters: saveTempDataContext.Filters,
httpContext: httpContext);
return(Task.CompletedTask);
},
state: context.HttpContext);
}
}
/// <inheritdoc />
public void OnResourceExecuting(ResourceExecutingContext context)
{
if (!context.HttpContext.Items.ContainsKey(SaveTempDataFilterContextKey))
{
var tempDataContext = new SaveTempDataContext()
{
Filters = context.Filters,
TempDataDictionaryFactory = _factory
};
context.HttpContext.Items.Add(SaveTempDataFilterContextKey, tempDataContext);
}
if (!context.HttpContext.Response.HasStarted)
{
context.HttpContext.Response.OnStarting(
callback: OnStartingCallback,
state: context.HttpContext);
}
}
