public async Task <IActionResult> ReceiveCommand([FromForm] SlackSlashCommand form)
{
string body;
using (var ms = new MemoryStream())
{
Request.Body.Seek(0, SeekOrigin.Begin);
Request.Body.CopyTo(ms);
body = System.Text.Encoding.Default.GetString(ms.ToArray());
}
var timestamp = Request.Headers["X-Slack-Request-Timestamp"];
var signature = Request.Headers["X-Slack-Signature"];
if (!_verifier.IsValid(timestamp, "v0", body, _appSettings.Value.SigningSecret, signature))
{
_logger.LogCritical($"Signature verification failed. {_verifier.ErrorMessage}");
return(Ok());
}
var command = form.Command.Substring(1);
var sendRequest = new SendMessageRequest
{
QueueUrl = $"{_appSettings.Value.SqsUrlPrefix}slack_{command}",
MessageBody = JsonConvert.SerializeObject(form)
};
try
{
await _sqs.SendMessageAsync(sendRequest);
return(Ok("Request received"));
}
catch (AmazonSQSException e)
{
if (e.ErrorCode == "AWS.SimpleQueueService.NonExistentQueue")
{
// Queue does not exist, let's create it.
var createRequest = new CreateQueueRequest($"slack_{command}")
{
Attributes =
{
["MessageRetentionPeriod"] = _appSettings.Value.NewQueueMessageRetentionPeriod.ToString(),
["VisibilityTimeout"] = _appSettings.Value.NewQueueVisibilityTimeout.ToString()
}
};
await _sqs.CreateQueueAsync(createRequest);
return(Ok($"Command [{command}] was used for the first time and you caught me setting up the pipes. Please send it again."));
}
_logger.LogError(e.ToString());
throw;
}
catch (Exception e)
{
_logger.LogError(e.ToString());
throw;
}
}
