/// <summary>
/// This method is called for every Lambda invocation. This method takes in an S3 event object and can be used
/// to respond to S3 notifications.
/// </summary>
/// <param name="s3Event"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <string> FunctionHandler(S3Event s3Event, ILambdaContext context)
{
context.Logger.LogLine("S3 Event Function Handler");
var s3CurrentEvent = s3Event.Records?[0].S3;
if (s3CurrentEvent == null)
{
return(null);
}
try
{
string eventMessage;
context.Logger.LogLine("Handler: Trying to GetObjectAsync from Amazon S3 Client");
// Get the S3 object that trigger the event
var response = await _amazonS3Client.GetObjectAsync(s3CurrentEvent.Bucket.Name, s3CurrentEvent.Object.Key);
// read the response stream and write your business logic what you want to do with event trigerred and data received.
using (var stream = response.ResponseStream)
{
var reader = new StreamReader(stream);
var s3Document = reader.ReadToEnd();
reader.Dispose();
var jsonDoc = JsonConvert.DeserializeObject(s3Document);
var items = JObject.Parse(jsonDoc.ToString());
eventMessage =
($"Handler: Got Data from Key {s3CurrentEvent.Object.Key} for {items.SelectToken("event").Value<string>()}" +
$" with description {items.SelectToken("description").Value<string>()}");
context.Logger.LogLine(eventMessage);
}
// you can modify the SlackMessage message here, before sending it.
await _slackClient.SendMessageAsync(_message, _webHookUri);
context.Logger.LogLine($"Handler: Sent notification to channel {_message.Channel}");
return(eventMessage);
}
catch (Exception e)
{
context.Logger.LogLine($"Error getting object {s3CurrentEvent.Object.Key} from bucket {s3CurrentEvent.Bucket.Name}. Make sure they exist and your bucket is in the same region as this function.");
context.Logger.LogLine(e.Message);
context.Logger.LogLine(e.StackTrace);
throw;
}
}
public async Task Log(LogType logType, string message)
{
await _client.SendMessageAsync(message);
}
public async Task AddAsync(T payload, CancellationToken cancellationToken = new CancellationToken())
{
await _slackClient.SendMessageAsync(payload);
}
