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Add initial support for S3 bucket notifications; fix subprocess32 ins…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| import re | ||
| import urlparse | ||
| import logging | ||
| import json | ||
| import xml.etree.ElementTree as ET | ||
| from requests.models import Response | ||
| from localstack.constants import * | ||
| from localstack.utils.aws import aws_stack | ||
| from localstack.utils.common import timestamp, TIMESTAMP_FORMAT_MILLIS | ||
|
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| # mappings for S3 bucket notifications | ||
| S3_NOTIFICATIONS = {} | ||
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| # set up logger | ||
| LOGGER = logging.getLogger(__name__) | ||
|
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| # XML namespace constants | ||
| XMLNS_S3 = 'http://s3.amazonaws.com/doc/2006-03-01/' | ||
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| def match_event(event, action, api_method): | ||
| regex = event.replace('*', '[^:]*') | ||
| action_string = 's3:%s:%s' % (action, api_method) | ||
| return re.match(regex, action_string) | ||
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| def get_event_message(event_name, bucket_name, file_name='testfile.txt', file_size=1024): | ||
| # Based on: http://docs.aws.amazon.com/AmazonS3/latest/dev/notification-content-structure.html | ||
| return { | ||
| 'Records': [{ | ||
| 'eventVersion': '2.0', | ||
| 'eventSource': 'aws:s3', | ||
| 'awsRegion': DEFAULT_REGION, | ||
| 'eventTime': timestamp(format=TIMESTAMP_FORMAT_MILLIS), | ||
| 'eventName': event_name, | ||
| 'userIdentity': { | ||
| 'principalId': 'AIDAJDPLRKLG7UEXAMPLE' | ||
| }, | ||
| 's3': { | ||
| 's3SchemaVersion': '1.0', | ||
| 'configurationId': 'testConfigRule', | ||
| 'bucket': { | ||
| 'name': bucket_name, | ||
| 'ownerIdentity': { | ||
| 'principalId': 'A3NL1KOZZKExample' | ||
| }, | ||
| 'arn': 'arn:aws:s3:::%s' % bucket_name | ||
| }, | ||
| 'object': { | ||
| 'key': file_name, | ||
| 'size': file_size, | ||
| 'eTag': 'd41d8cd98f00b204e9800998ecf8427e', | ||
| 'versionId': '096fKKXTRTtl3on89fVO.nfljtsv6qko', | ||
| 'sequencer': '0055AED6DCD90281E5' | ||
| } | ||
| } | ||
| }] | ||
| } | ||
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| def send_notifications(method, bucket_name, object_path): | ||
| for bucket, config in S3_NOTIFICATIONS.iteritems(): | ||
| if bucket == bucket_name: | ||
| action = {'PUT': 'ObjectCreated', 'DELETE': 'ObjectRemoved'}[method] | ||
| # TODO: support more detailed methods, e.g., DeleteMarkerCreated | ||
| # http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html | ||
| api_method = {'PUT': 'Put', 'DELETE': 'Delete'}[method] | ||
| event_name = '%s:%s' % (action, api_method) | ||
| if match_event(config['Event'], action, api_method): | ||
| # send notification | ||
| message = get_event_message(event_name=event_name, bucket_name=bucket_name) | ||
| message = json.dumps(message) | ||
| result = None | ||
| if config.get('Queue'): | ||
| sqs_client = aws_stack.connect_to_service('sqs') | ||
| sqs_client.send_message(QueueUrl=config['Queue'], MessageBody=message) | ||
| if config.get('Topic'): | ||
| sns_client = aws_stack.connect_to_service('sns') | ||
| sns_client.publish(TopicArn=config['Topic'], Message=message) | ||
| if config.get('CloudFunction'): | ||
| lambda_client = aws_stack.connect_to_service('lambda') | ||
| lambda_client.invoke(FunctionName=config['CloudFunction'], Payload=message) | ||
| if not filter(lambda x: config.get(x), ('Queue', 'Topic', 'CloudFunction')): | ||
| LOGGER.warn('Neither of Queue/Topic/CloudFunction defined for S3 notification.') | ||
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| def get_xml_text(node, name, ns=None, default=None): | ||
| if ns is not None: | ||
| name = '{%s}%s' % (ns, name) | ||
| child = node.find(name) | ||
| if child is None: | ||
| return default | ||
| return child.text | ||
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| def update_s3(method, path, data, headers, response=None, return_forward_info=False): | ||
| if return_forward_info: | ||
| parsed = urlparse.urlparse(path) | ||
| query = parsed.query | ||
| path = parsed.path | ||
| query_map = urlparse.parse_qs(query) | ||
| if method == 'PUT' and (query == 'notification' or 'notification' in query_map): | ||
| tree = ET.fromstring(data) | ||
| queue_config = tree.find('{%s}QueueConfiguration' % XMLNS_S3) | ||
| if len(queue_config): | ||
| bucket = path[1:] | ||
| S3_NOTIFICATIONS[bucket] = { | ||
| 'Id': get_xml_text(queue_config, 'Id'), | ||
| 'Event': get_xml_text(queue_config, 'Event', ns=XMLNS_S3), | ||
| 'Queue': get_xml_text(queue_config, 'Queue', ns=XMLNS_S3), | ||
| 'Topic': get_xml_text(queue_config, 'Topic', ns=XMLNS_S3), | ||
| 'CloudFunction': get_xml_text(queue_config, 'CloudFunction', ns=XMLNS_S3) | ||
| } | ||
| return True | ||
| if method in ('PUT', 'DELETE') and '/' in path[1:]: | ||
| parts = path[1:].split('/', 1) | ||
| bucket_name = parts[0] | ||
| object_path = '/%s' % parts[1] | ||
| send_notifications(method, bucket_name, object_path) |
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