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AWS Lambda: Determine Event Source from event object. Note that this is an approximation as anybody can send a payload that resembles the real thing.
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function getLambdaEventSource(event) { | |
if (event.Records && event.Records[0].cf) return 'isCloudfront'; | |
if (event.configRuleId && event.configRuleName && event.configRuleArn) return 'isAwsConfig'; | |
if (event.Records && (event.Records[0].eventSource === 'aws:codecommit')) return 'isCodeCommit'; | |
if (event.authorizationToken === "incoming-client-token") return 'isApiGatewayAuthorizer'; | |
if (event.StackId && event.RequestType && event.ResourceType) return 'isCloudFormation'; | |
if (event.Records && (event.Records[0].eventSource === 'aws:ses')) return 'isSes'; | |
if (event.pathParameters && event.pathParameters.proxy) return 'isApiGatewayAwsProxy'; | |
if (event.source === 'aws.events') return 'isScheduledEvent'; | |
if (event.awslogs && event.awslogs.data) return 'isCloudWatchLogs'; | |
if (event.Records && (event.Records[0].EventSource === 'aws:sns')) return 'isSns'; | |
if (event.Records && (event.Records[0].eventSource === 'aws:dynamodb')) return 'isDynamoDb'; | |
if (event.records && event.records[0].approximateArrivalTimestamp) return 'isKinesisFirehose'; | |
if (event.records && event.deliveryStreamArn && event.deliveryStreamArn.startsWith('arn:aws:kinesis:')) return 'isKinesisFirehose'; | |
if (event.eventType === 'SyncTrigger' && event.identityId && event.identityPoolId) return 'isCognitoSyncTrigger'; | |
if (event.Records && event.Records[0].eventSource === 'aws:kinesis') return 'isKinesis'; | |
if (event.Records && event.Records[0].eventSource === 'aws:s3') return 'isS3'; | |
if (event.operation && event.message) return 'isMobileBackend'; | |
if (event.Records && (event.Records[0].eventSource === 'aws:sqs')) return 'isSqs'; | |
} |
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if (event.source === 'aws.scheduler') return 'isScheduler';