Source code for apache_beam.io.aws.clients.s3.boto3_client

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#    http://www.apache.org/licenses/LICENSE-2.0
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# pytype: skip-file

from __future__ import absolute_import

from apache_beam.io.aws.clients.s3 import messages

try:
  # pylint: disable=wrong-import-order, wrong-import-position
  # pylint: disable=ungrouped-imports
  import boto3

except ImportError:
  boto3 = None


[docs]class Client(object): """ Wrapper for boto3 library """ def __init__(self): assert boto3 is not None, 'Missing boto3 requirement' self.client = boto3.client('s3')
[docs] def get_object_metadata(self, request): r"""Retrieves an object's metadata. Args: request: (GetRequest) input message Returns: (Object) The response message. """ kwargs = {'Bucket': request.bucket, 'Key': request.object} try: boto_response = self.client.head_object(**kwargs) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code) item = messages.Item( boto_response['ETag'], request.object, boto_response['LastModified'], boto_response['ContentLength'], boto_response['ContentType']) return item
[docs] def get_range(self, request, start, end): r"""Retrieves an object's contents. Args: request: (GetRequest) request Returns: (bytes) The response message. """ try: boto_response = self.client.get_object( Bucket=request.bucket, Key=request.object, Range='bytes={}-{}'.format(start, end - 1)) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code) return boto_response['Body'].read() # A bytes object
[docs] def list(self, request): r"""Retrieves a list of objects matching the criteria. Args: request: (ListRequest) input message Returns: (ListResponse) The response message. """ kwargs = {'Bucket': request.bucket, 'Prefix': request.prefix} if request.continuation_token is not None: kwargs['ContinuationToken'] = request.continuation_token try: boto_response = self.client.list_objects_v2(**kwargs) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code) if boto_response['KeyCount'] == 0: message = 'Tried to list nonexistent S3 path: s3://%s/%s' % ( request.bucket, request.prefix) raise messages.S3ClientError(message, 404) items = [ messages.Item( etag=content['ETag'], key=content['Key'], last_modified=content['LastModified'], size=content['Size']) for content in boto_response['Contents'] ] try: next_token = boto_response['NextContinuationToken'] except KeyError: next_token = None response = messages.ListResponse(items, next_token) return response
[docs] def create_multipart_upload(self, request): r"""Initates a multipart upload to S3 for a given object Args: request: (UploadRequest) input message Returns: (UploadResponse) The response message. """ try: boto_response = self.client.create_multipart_upload( Bucket=request.bucket, Key=request.object, ContentType=request.mime_type) response = messages.UploadResponse(boto_response['UploadId']) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code) return response
[docs] def upload_part(self, request): r"""Uploads part of a file to S3 during a multipart upload Args: request: (UploadPartRequest) input message Returns: (UploadPartResponse) The response message. """ try: boto_response = self.client.upload_part( Body=request.bytes, Bucket=request.bucket, Key=request.object, PartNumber=request.part_number, UploadId=request.upload_id) response = messages.UploadPartResponse( boto_response['ETag'], request.part_number) return response except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code)
[docs] def complete_multipart_upload(self, request): r"""Completes a multipart upload to S3 Args: request: (UploadPartRequest) input message Returns: (Void) The response message. """ parts = {'Parts': request.parts} try: self.client.complete_multipart_upload( Bucket=request.bucket, Key=request.object, UploadId=request.upload_id, MultipartUpload=parts) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code)
[docs] def delete(self, request): r"""Deletes given object from bucket Args: request: (DeleteRequest) input message Returns: (void) Void, otherwise will raise if an error occurs """ try: self.client.delete_object(Bucket=request.bucket, Key=request.object) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code)
[docs] def delete_batch(self, request): aws_request = { 'Bucket': request.bucket, 'Delete': { 'Objects': [{ 'Key': object } for object in request.objects] } } try: aws_response = self.client.delete_objects(**aws_request) except Exception as e: message = e.response['Error']['Message'] code = int(e.response['ResponseMetadata']['HTTPStatusCode']) raise messages.S3ClientError(message, code) deleted = [obj['Key'] for obj in aws_response.get('Deleted', [])] failed = [obj['Key'] for obj in aws_response.get('Errors', [])] errors = [ messages.S3ClientError(obj['Message'], obj['Code']) for obj in aws_response.get('Errors', []) ] return messages.DeleteBatchResponse(deleted, failed, errors)
[docs] def copy(self, request): try: copy_src = {'Bucket': request.src_bucket, 'Key': request.src_key} self.client.copy(copy_src, request.dest_bucket, request.dest_key) except Exception as e: message = e.response['Error']['Message'] code = e.response['ResponseMetadata']['HTTPStatusCode'] raise messages.S3ClientError(message, code)