public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = "tygerbytes/mailgun/webhook")] HttpRequest req,
[Queue("email-outbox")] IAsyncCollector <EmailMessage> emailQueue,
ILogger log)
{
var config = FuncConfig.Instance;
var context = new FuncContext
{
Config = config,
EmailQueue = emailQueue,
Logger = log,
SpamFilter = SpamFilter.GetInstance()
};
var payload = await DeserializeRequestPayload(req);
log.LogInformation(Utils.ToJson(payload));
if (!payload.Signature.IsValid(config.MailgunWebhookSigningKey))
{
return(new ObjectResult("Invalid signature")
{
// Mailgun will keep retrying unless we send a 406
StatusCode = 406
});
}
var responseStrategy = ResponseStrategyFactory.GetStrategy(payload.EventData.Event);
var result = await responseStrategy.Execute(context, payload);
return(result);
}
internal static SpamFilter GetInstance()
{
if (_filter == null)
{
_filter = new SpamFilter();
}
return(_filter);
}