public override string GetTriggerReason(IDictionary <string, string> arguments)
{
string invokeString = null;
if (arguments != null && arguments.TryGetValue(Name, out invokeString))
{
HttpRequestMessage request = WebHookTriggerBinding.FromInvokeString(invokeString);
return(string.Format("WebHook triggered by request to '{0}'", request.RequestUri));
}
return(null);
}
public Task <ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
ParameterInfo parameter = context.Parameter;
WebHookTriggerAttribute attribute = parameter.GetCustomAttribute <WebHookTriggerAttribute>(inherit: false);
if (attribute == null)
{
return(Task.FromResult <ITriggerBinding>(null));
}
// Can bind to user types, HttpRequestMessage, WebHookContext, and all the Read
// Types supported by StreamValueBinder
IEnumerable <Type> supportedTypes = StreamValueBinder.GetSupportedTypes(FileAccess.Read)
.Union(new Type[] { typeof(HttpRequestMessage), typeof(WebHookContext) });
bool isSupportedTypeBinding = ValueBinder.MatchParameterType(parameter, supportedTypes);
bool isUserTypeBinding = !isSupportedTypeBinding && WebHookTriggerBinding.IsValidUserType(parameter.ParameterType);
if (!isSupportedTypeBinding && !isUserTypeBinding)
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture,
"Can't bind WebHookTriggerAttribute to type '{0}'.", parameter.ParameterType));
}
if (!isUserTypeBinding && attribute.FromUri)
{
throw new InvalidOperationException("'FromUri' can only be set to True when binding to custom Types.");
}
// Validate route format
if (!string.IsNullOrEmpty(attribute.Route))
{
string[] routeSegements = attribute.Route.Split('/');
if (routeSegements.Length > 2)
{
throw new InvalidOperationException("WebHook routes can only have a maximum of two segments.");
}
}
return(Task.FromResult <ITriggerBinding>(new WebHookTriggerBinding(_dispatcher, context.Parameter, isUserTypeBinding, attribute)));
}
