private void AddReceiverFilters(ActionModel action, IList <IFilterMetadata> filters)
{
if (action.Properties.TryGetValue(typeof(IWebHookFilterMetadata), out var filterMetadataObject) &&
filterMetadataObject is IWebHookFilterMetadata filterMetadata)
{
var context = new WebHookFilterMetadataContext(action);
filterMetadata.AddFilters(context);
foreach (var filter in context.Results)
{
filters.Add(filter);
}
}
}
/// <inheritdoc />
public void OnProvidersExecuting(FilterProviderContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var actionContext = context.ActionContext;
if (!actionContext.RouteData.TryGetWebHookReceiverName(out var recieverName))
{
// Not a WebHook request.
return;
}
var actionDescriptor = actionContext.ActionDescriptor;
var bodyTypeMetadataObject = actionDescriptor.Properties[typeof(IWebHookBodyTypeMetadataService)];
if (bodyTypeMetadataObject is IWebHookBodyTypeMetadataService)
{
// Action is receiver-specific. WebHookFilterProvider already added the necessary filters.
return;
}
var filterMetadata = _metadataProvider.GetFilterMetadata(recieverName);
if (filterMetadata == null)
{
// No need for receiver-specific filters.
return;
}
var providerContext = new WebHookFilterMetadataContext(actionDescriptor);
filterMetadata.AddFilters(providerContext);
if (providerContext.Results.Count == 0)
{
// No receiver-specific filters to add.
return;
}
// Treat all WebHook filters as if they have FilterScope.Action. DefaultFilterProvider will fill in
// FilterItem.Filter, usually copying FilterDescriptor.Filter.
var newFilterItems = providerContext.Results
.Select(filter => new FilterItem(new FilterDescriptor(filter, FilterScope.Action))
{
IsReusable = false,
});
// MVC sorts context.Results before calling IFilterProvider implementations. Assume nothing has disturbed
// that order: Insert results and do not re-sort the whole collection.
var itemsList = context.Results as List <FilterItem> ?? new List <FilterItem>(context.Results);
context.Results = itemsList;
foreach (var newFilterItem in newFilterItems)
{
var position = itemsList.BinarySearch(newFilterItem, FilterItemComparer.Instance);
if (position >= 0)
{
// Insert after the match.
itemsList.Insert(position + 1, newFilterItem);
}
else
{
itemsList.Insert(~position, newFilterItem);
}
}
}
/// <summary>
/// Add <see cref="IFilterMetadata"/> instances to <see cref="WebHookFilterMetadataContext.Results"/> of <paramref name="context"/>.
/// </summary>
/// <param name="context">The <see cref="WebHookFilterMetadataContext"/> for the action.</param>
public void AddFilters(WebHookFilterMetadataContext context)
{
context.Results.Add(_securityFilter);
context.Results.Add(_intentVerificationFilter);
}
public void AddFilters(WebHookFilterMetadataContext context)
{
context.Results.Add(this.verifySignatureFilter);
}
/// <inheritdoc />
public void AddFilters(WebHookFilterMetadataContext context)
{
context.Results.Add(_fitbitVerifySubscriberFilter);
context.Results.Add(_fitbitVerifySignatureFilter);
context.Results.Add(_fitbitActionResultFilter);
}
