Object Storage Service:Use event notifications to process real-time object changes

{
    "events": [
      {
        "eventName": "",  // The event notification type.
        "eventSource": "", // The source of the event notification. This value is fixed as "acs:oss".
        "eventTime": "", // The time when the event occurred, in ISO 8601 format.
        "eventVersion": "", // The version of the event notification. The current version is "1.0".
        "oss": {
            "bucket": {
                "arn": "", // The Alibaba Cloud Resource Name (ARN) of the bucket, in the format of "acs:oss:region:uid:bucketname".
                "name": "", // The name of the destination bucket.
                "ownerIdentity": "" // The owner of the bucket.
            }, 
            "object": {
                "deltaSize": "", // The change in the object size. For example, when a new object is created, this value is the object size. When an object is overwritten, this value is the difference in size between the new object and the old object, which can be negative.
                "eTag": "", // The ETag of the object.
                "key": "", // The object key.
                "position": "", // The starting position for an append operation. This parameter applies only to the ObjectCreated:AppendObject event. The first AppendObject request for an object starts at byte 0.
                "readFrom": "", // The starting position for a read operation. This parameter applies only to the ObjectDownloaded:GetObject event. For a non-range request, this value is 0. For a range request, this value is the starting byte of the request.
                "readTo": "", // The ending position for a read operation. This parameter applies only to the ObjectDownloaded:GetObject event. For a non-range request, this value is the object size. For a range request, this value is the ending byte of the range request plus 1.
                "size": "" // The size of the object.
                }, 
        "ossSchemaVersion": "", // The version of this schema. The current version is "1.0".
        "ruleId": "GetObject", // The ID of the matching event notification rule.
        "region": "", // The bucket's region.
        "requestParameters": {
            "sourceIPAddress": "" // The source IP address of the request.
            }, 
        "responseElements": {
            "requestId": "" // The request ID.
            }, 
        "userIdentity": {
            "principalId": "" // The UID of the user who made the request.
            }, 
        "xVars": {  // Custom parameters in the OSS upload callback feature.
            "x:callback-var1":"value1",
            "x:callback-var2":"value2"
            }
        }        
     }
  ]
}

{"events": [
      {
        "eventName": "ObjectDownloaded:GetObject",
        "eventSource": "acs:oss",
        "eventTime": "2016-07-01T11:17:30.000Z",
        "eventVersion": "1.0",
        "oss": {
            "bucket": {
                "arn": "acs:oss:cn-shenzhen:114895646818****:event-notification-test-shenzhen",
                "name": "event-notification-test-shenzhen",
                "ownerIdentity": "114895646818****"},
            "object": {
                "deltaSize": 0,
                "eTag": "0CC175B9C0F1B6468E1199E269772661",
                "key": "test",
                "readFrom": 0,
                "readTo": 1,
                "size": 1
            },
        "ossSchemaVersion": "1.0",
        "ruleId": "GetObjectRule",
        "region": "cn-shenzhen",
        "requestParameters": {
            "sourceIPAddress": "198.51.100.1"
            },
        "responseElements": {
            "requestId": "5FF16B65F05BC932307A3C3C"
            },
        "userIdentity": {
            "principalId": "114895646818****"
            },
        "xVars": {
            "x:callback-var1":"value1",
            "x:callback-var2":"value2"
            }
        }        
     }
  ]
}