如何用多个触发器触发同一个lambda函数?

1. 在前端,用户使用API网关触发一个lambda函数 将文件发送到s3。
2. 当文件到达s3时,触发相同的lambda函数来应用视频
3. 当SNS接收到消息时,触发同一lambda函数以获取消息 标记数据并使用API网关将数据返回给用户

注意:标签数据需要通过API返回给用户

应该是这样的:

rekognition = boto3.client("rekognition")
sns = boto3.client("sns")

def lambda_handler(event, context):
    # should be triggered when s3 recives file after API call
    response = rekognition.start_label_detection(
        Video = {
            "S3Object": {
                "Bucket": BUCKET,
                "Name": KEY
            }
        },
        NotificationChannel = {
            "SNSTopicArn": SNS_TOPIC_ARN,
            "RoleArn": ROLE_ARN
        }
    )

    # should be triggerd when sns message has arrived
    if "Records" in event:
        message = event["Records"][0]["Sns"]["Message"]
        #perform get lables here from jobId...



    # should return labels back to the user
    return {
        "statusCode": 200,
        "body": json.dumps(lables),
        "headers": {
        "Access-Control-Allow-Origin": "*",
        "Content-Type": "application/json"

        }
    }