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1772 lines (1461 loc) · 66.2 KB
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# -*- coding: utf-8 -*-
# Minio Python Library for Amazon S3 Compatible Cloud Storage, (C)
# 2015, 2016 Minio, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
minio.api
~~~~~~~~~~~~
This module implements the API.
:copyright: (c) 2015, 2016 by Minio, Inc.
:license: Apache 2.0, see LICENSE for more details.
"""
# Standard python packages
from __future__ import absolute_import
import platform
from time import mktime, strptime
from datetime import datetime, timedelta
import io
import json
import os
import itertools
# Dependencies
import urllib3
import certifi
# Internal imports
from . import __title__, __version__
from .compat import urlsplit, range, urlencode, basestring
from .error import ResponseError, InvalidArgumentError, InvalidSizeError
from .definitions import Object, UploadPart
from .parsers import (parse_list_buckets,
parse_list_objects,
parse_list_objects_v2,
parse_list_parts,
parse_copy_object,
parse_list_multipart_uploads,
parse_new_multipart_upload,
parse_location_constraint,
parse_multipart_upload_result,
parse_get_bucket_notification,
parse_multi_object_delete_response)
from .helpers import (get_target_url, is_non_empty_string,
is_valid_endpoint,
get_sha256_hexdigest, get_md5_base64digest, Hasher,
optimal_part_info,
is_valid_bucket_name, PartMetadata, parts_manager,
is_valid_bucket_notification_config,
mkdir_p, dump_http)
from .helpers import (MAX_MULTIPART_OBJECT_SIZE,
MIN_OBJECT_SIZE)
from .signer import (sign_v4, presign_v4,
generate_credential_string,
post_presign_signature, _SIGN_V4_ALGORITHM)
from .xml_marshal import (xml_marshal_bucket_constraint,
xml_marshal_complete_multipart_upload,
xml_marshal_bucket_notifications,
xml_marshal_delete_objects)
from .limited_reader import LimitedReader
from . import policy
# Comment format.
_COMMENTS = '({0}; {1})'
# App info format.
_APP_INFO = '{0}/{1}'
# Minio (OS; ARCH) LIB/VER APP/VER .
_DEFAULT_USER_AGENT = 'Minio {0} {1}'.format(
_COMMENTS.format(platform.system(),
platform.machine()),
_APP_INFO.format(__title__,
__version__))
_SEVEN_DAYS_SECONDS = 604800 # 7days
class Minio(object):
"""
Constructs a :class:`Minio <Minio>`.
Examples:
client = Minio('play.minio.io:9000')
client = Minio('s3.amazonaws.com', 'ACCESS_KEY', 'SECRET_KEY')
:param endpoint: Hostname of the cloud storage server.
:param access_key: Access key to sign self._http.request with.
:param secret_key: Secret key to sign self._http.request with.
:param secure: Set this value if wish to make secure requests.
Default is True.
:return: :class:`Minio <Minio>` object
"""
def __init__(self, endpoint, access_key=None,
secret_key=None, secure=True):
# Validate endpoint.
is_valid_endpoint(endpoint)
# Default is a secured connection.
endpoint_url = 'https://' + endpoint
if not secure:
endpoint_url = 'http://' + endpoint
url_components = urlsplit(endpoint_url)
self._region_map = dict()
self._endpoint_url = url_components.geturl()
self._access_key = access_key
self._secret_key = secret_key
self._user_agent = _DEFAULT_USER_AGENT
self._trace_output_stream = None
self._http = urllib3.PoolManager(
cert_reqs='CERT_REQUIRED',
ca_certs=certifi.where()
)
# Set application information.
def set_app_info(self, app_name, app_version):
"""
Sets your application name and version to
default user agent in the following format.
Minio (OS; ARCH) LIB/VER APP/VER
Example:
client.set_app_info('my_app', '1.0.2')
:param app_name: application name.
:param app_version: application version.
"""
if not (app_name and app_version):
raise ValueError('app_name and app_version cannot be empty.')
app_info = _APP_INFO.format(app_name,
app_version)
self._user_agent = ' '.join([_DEFAULT_USER_AGENT, app_info])
# enable HTTP trace.
def trace_on(self, stream):
"""
Enable http trace.
:param output_stream: Stream where trace is written to.
"""
if not stream:
raise ValueError('Input stream for trace output is invalid.')
# Save new output stream.
self._trace_output_stream = stream
# disable HTTP trace.
def trace_off(self):
"""
Disable HTTP trace.
"""
self._trace_output_stream = None
# Bucket level
def make_bucket(self, bucket_name, location='us-east-1'):
"""
Make a new bucket on the server.
Optionally include Location.
['us-east-1', 'us-west-1', 'us-west-2', 'eu-west-1', 'eu-central-1',
'ap-southeast-1', 'ap-southeast-2', 'ap-northeast-1', 'sa-east-1',
'cn-north-1']
Examples:
minio.make_bucket('foo')
minio.make_bucket('foo', 'us-west-1')
:param bucket_name: Bucket to create on server
:param location: Location to create bucket on
"""
is_valid_bucket_name(bucket_name)
method = 'PUT'
# Set user agent once before the request.
headers = {'User-Agent': self._user_agent}
content = None
if location and location != 'us-east-1':
content = xml_marshal_bucket_constraint(location)
headers['Content-Length'] = str(len(content))
content_sha256_hex = get_sha256_hexdigest(content)
if content:
headers['Content-Md5'] = get_md5_base64digest(content)
# In case of Amazon S3. The make bucket issued on already
# existing bucket would fail with 'AuthorizationMalformed'
# error if virtual style is used. So we default to 'path
# style' as that is the preferred method here. The final
# location of the 'bucket' is provided through XML
# LocationConstraint data with the request.
# Construct target url.
url = self._endpoint_url + '/' + bucket_name + '/'
# Get signature headers if any.
headers = sign_v4(method, url, 'us-east-1',
headers, self._access_key,
self._secret_key, content_sha256_hex)
response = self._http.urlopen(method, url,
body=content,
headers=headers,
preload_content=False)
if response.status != 200:
response_error = ResponseError(response)
raise response_error.put(bucket_name)
self._set_bucket_region(bucket_name, region=location)
def list_buckets(self):
"""
List all buckets owned by the user.
Example:
bucket_list = minio.list_buckets()
for bucket in bucket_list:
print(bucket.name, bucket.created_date)
:return: An iterator of buckets owned by the current user.
"""
method = 'GET'
url = get_target_url(self._endpoint_url)
# Set user agent once before the request.
headers = {'User-Agent': self._user_agent}
# default for all r
8
equests.
10BC8
region = 'us-east-1'
# Get signature headers if any.
headers = sign_v4(method, url, region,
headers, self._access_key,
self._secret_key, None)
response = self._http.urlopen(method, url,
body=None,
headers=headers,
preload_content=False)
if self._trace_output_stream:
dump_http(method, url, headers, response,
self._trace_output_stream)
if response.status != 200:
response_error = ResponseError(response)
raise response_error.get()
return parse_list_buckets(response.data)
def bucket_exists(self, bucket_name):
"""
Check if the bucket exists and if the user has access to it.
:param bucket_name: To test the existence and user access.
:return: True on success.
"""
is_valid_bucket_name(bucket_name)
try:
self._url_open('HEAD', bucket_name=bucket_name, headers={})
# If the bucket has not been created yet, Minio will return a "NoSuchBucket" error.
except ResponseError as e:
if e.code == 'NoSuchBucket':
return False
raise
return True
def remove_bucket(self, bucket_name):
"""
Remove a bucket.
:param bucket_name: Bucket to remove
"""
is_valid_bucket_name(bucket_name)
self._url_open('DELETE', bucket_name=bucket_name, headers={})
# Make sure to purge bucket_name from region cache.
self._delete_bucket_region(bucket_name)
def _get_bucket_policy(self, bucket_name):
policy_dict = {}
try:
response = self._url_open("GET",
bucket_name=bucket_name,
query={"policy": ""},
headers={})
policy_dict = json.loads(response.read().decode('utf-8'))
except ResponseError as e:
# Ignore 'NoSuchBucketPolicy' error.
if e.code != 'NoSuchBucketPolicy':
raise
return policy_dict
def get_bucket_policy(self, bucket_name, prefix=""):
"""
Get bucket policy of given bucket name.
:param bucket_name: Bucket name.
:param prefix: Object prefix.
"""
is_valid_bucket_name(bucket_name)
policy_dict = self._get_bucket_policy(bucket_name)
# Normalize statements.
statements = []
policy.append_statements(statements, policy_dict.get('Statement', []))
return policy.get_policy(statements, bucket_name, prefix)
def set_bucket_policy(self, bucket_name, prefix, policy_access):
"""
Set bucket policy of given bucket name and object prefix.
:param bucket_name: Bucket name.
:param prefix: Object prefix.
"""
is_valid_bucket_name(bucket_name)
policy_dict = self._get_bucket_policy(bucket_name)
if policy_access == policy.Policy.NONE and not policy_dict:
return
if not policy_dict:
policy_dict = {'Statement': [],
"Version": "2012-10-17"}
# Normalize statements.
statements = []
policy.append_statements(statements, policy_dict['Statement'])
statements = policy.set_policy(statements, policy_access,
bucket_name, prefix)
if not statements:
self._url_open("DELETE",
bucket_name=bucket_name,
query={"policy": ""},
headers={})
else:
policy_dict['Statement'] = statements
content = json.dumps(policy_dict)
headers = {
'Content-Length': str(len(content)),
'Content-Md5': get_md5_base64digest(content)
}
content_sha256_hex = get_sha256_hexdigest(content)
self._url_open("PUT",
bucket_name=bucket_name,
query={"policy": ""},
headers=headers,
body=content,
content_sha256=content_sha256_hex)
def get_bucket_notification(self, bucket_name):
"""
Get notifications configured for the given bucket.
:param bucket_name: Bucket name.
"""
is_valid_bucket_name(bucket_name)
response = self._url_open(
"GET",
bucket_name=bucket_name,
query={"notification": ""},
headers={}
)
data = response.read().decode('utf-8')
return parse_get_bucket_notification(data)
def set_bucket_notification(self, bucket_name, notifications):
"""
Set the given notifications on the bucket.
:param bucket_name: Bucket name.
:param notifications: Notifications structure
"""
is_valid_bucket_name(bucket_name)
is_valid_bucket_notification_config(notifications)
content = xml_marshal_bucket_notifications(notifications)
headers = {
'Content-Length': str(len(content)),
'Content-Md5': get_md5_base64digest(content)
}
content_sha256_hex = get_sha256_hexdigest(content)
self._url_open(
'PUT',
bucket_name=bucket_name,
query={"notification": ""},
headers=headers,
body=content,
content_sha256=content_sha256_hex
)
def remove_all_bucket_notification(self, bucket_name):
"""
Removes all bucket notification configs configured
previously, this call disable event notifications
on a bucket. This operation cannot be undone, to
set notifications again you should use
``set_bucket_notification``
:param bucket_name: Bucket name.
"""
is_valid_bucket_name(bucket_name)
content_bytes = xml_marshal_bucket_notifications({})
headers = {
'Content-Length': str(len(content_bytes)),
'Content-Md5': get_md5_base64digest(content_bytes)
}
content_sha256_hex = get_sha256_hexdigest(content_bytes)
self._url_open(
'PUT',
bucket_name=bucket_name,
query={"notification": ""},
headers=headers,
body=content_bytes,
content_sha256=content_sha256_hex
)
def listen_bucket_notification(self, bucket_name, prefix, suffix, events):
"""
Yeilds new event notifications on a bucket, caller should iterate
to read new notifications.
NOTE: Notification is retried in case of `SyntaxError` otherwise
the function raises an exception.
:param bucket_name: Bucket name to listen event notifications from.
:param prefix: Object key prefix to filter notifications for.
:param suffix: Object key suffix to filter notifications for.
:param events: Enables notifications for specific event types.
of events.
"""
is_valid_bucket_name(bucket_name)
url_components = urlsplit(self._endpoint_url)
if url_components.hostname == 's3.amazonaws.com':
raise InvalidArgumentError(
'Listening for event notifications on a bucket is a Minio '
'specific extension to bucket notification API. It is not '
'supported by Amazon S3')
query = {
'prefix': prefix,
'suffix': suffix,
'events': events,
}
while True:
response = self._url_open('GET', bucket_name=bucket_name,
query=query, headers={})
try:
for line in response.stream():
event = json.loads(line)
if event['Records'] is not None:
yield event
except SyntaxError:
response.close()
continue
def _get_upload_id(self, bucket_name, object_name, content_type):
"""
Get previously uploaded upload id for object name or initiate a request
to fetch a new upload id.
:param bucket_name: Bucket name where the incomplete upload resides.
:param object_name: Object name for which upload id is requested.
:param content_type: Content type of the object.
"""
recursive = True
current_uploads = self._list_incomplete_uploads(bucket_name,
object_name,
recursive,
is_aggregate_size=False)
matching_uploads = [upload
for upload in current_uploads
if object_name == upload.object_name]
# If no matching uploads its a new multipart upload.
if not len(matching_uploads):
upload_id = self._new_multipart_upload(bucket_name,
object_name,
content_type)
else:
incomplete_upload = max(matching_uploads, key=lambda x: x.initiated)
upload_id = incomplete_upload.upload_id
return upload_id
def fput_object(self, bucket_name, object_name, file_path,
content_type='application/octet-stream'):
"""
Add a new object to the cloud storage server.
Examples:
minio.fput_object('foo', 'bar', 'filepath', 'text/plain')
:param bucket_name: Bucket to read object from.
:param object_name: Name of the object to read.
:param file_path: Local file path to be uploaded.
:param content_type: Content type of the object.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
is_non_empty_string(file_path)
# save file_size.
file_size = os.stat(file_path).st_size
if file_size > MAX_MULTIPART_OBJECT_SIZE:
raise InvalidArgumentError('Input content size is bigger '
' than allowed maximum of 5TiB.')
# Open file in 'read' mode.
file_data = io.open(file_path, mode='rb')
if file_size <= MIN_OBJECT_SIZE:
return self._do_put_object(bucket_name, object_name,
file_data.read(file_size),
content_type=content_type)
# Calculate optimal part info.
total_parts_count, part_size, last_part_size = optimal_part_info(file_size)
# get upload id.
upload_id = self._get_upload_id(bucket_name, object_name, content_type)
# Initialize variables
uploaded_parts = {}
total_uploaded = 0
# Iter over the uploaded parts.
parts_iter = self._list_object_parts(bucket_name,
object_name,
upload_id)
for part in parts_iter:
# Save uploaded parts for future verification.
uploaded_parts[part.part_number] = part
# Always start with first part number.
for part_number in range(1, total_parts_count + 1):
# Save the current part size that needs to be uploaded.
current_part_size = part_size
if part_number == total_parts_count:
current_part_size = last_part_size
# Save current offset as previous offset.
prev_offset = file_data.seek(0, 1)
# Calculate md5sum and sha256.
md5hasher = Hasher.md5()
sha256hasher = Hasher.sha256()
total_read = 0
# Save LimitedReader, read upto current_part_size for
# md5sum and sha256 calculation.
part = LimitedReader(file_data, current_part_size)
while total_read < current_part_size:
current_data = part.read() # Read in 64k chunks.
if not current_data or len(current_data) == 0:
break
md5hasher.update(current_data)
sha256hasher.update(current_data)
total_read += len(current_data)
part_md5_hex = md5hasher.hexdigest()
# Verify if current part number has been already
# uploaded. Verify if the size is same, further verify if
# we have matching md5sum as well.
if part_number in uploaded_parts:
previous_part = uploaded_parts[part_number]
if previous_part.size == current_part_size:
if previous_part.etag == part_md5_hex:
total_uploaded += previous_part.size
continue
# Seek back to previous offset position before checksum
# calculation.
file_data.seek(prev_offset, 0)
# Create the LimitedReader again for the http reader.
part = LimitedReader(file_data, current_part_size)
part_metadata = PartMetadata(part, md5hasher, sha256hasher,
current_part_size)
# Initiate multipart put.
etag = self._do_put_multipart_object(bucket_name, object_name,
part_metadata,
content_type, upload_id,
part_number)
# Save etags.
uploaded_parts[part_number] = UploadPart(bucket_name,
object_name,
upload_id,
part_number,
etag, None,
total_read)
# Total uploaded.
total_uploaded += total_read
if total_uploaded != file_size:
msg = 'Data uploaded {0} is not equal input size ' \
'{1}'.format(total_uploaded, file_size)
raise InvalidSizeError(msg)
# Complete all multipart transactions if possible.
return self._complete_multipart_upload(bucket_name, object_name,
upload_id, uploaded_parts)
def fget_object(self, bucket_name, object_name, file_path):
"""
Retrieves an object from a bucket and writes at file_path.
Examples:
minio.fget_object('foo', 'bar', 'localfile')
:param bucket_name: Bucket to read object from.
:param object_name: Name of the object to read.
:param file_path: Local file path to save the object.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
stat = self.stat_object(bucket_name, object_name)
if os.path.isdir(file_path):
raise OSError("file is a directory.")
# Create top level directory if needed.
top_level_dir = os.path.dirname(file_path)
if top_level_dir:
mkdir_p(top_level_dir)
# Write to a temporary file "file_path.part.minio" before saving.
file_part_path = file_path + stat.etag + '.part.minio'
# Open file in 'write+append' mode.
with open(file_part_path, 'ab') as file_part_data:
# Save current file_part statinfo.
file_statinfo = os.stat(file_part_path)
# Get partial object.
response = self._get_partial_object(bucket_name, object_name,
offset=file_statinfo.st_size,
length=0)
# Save content_size to verify if we wrote more data.
content_size = int(response.headers['content-length'])
# Save total_written.
total_written = 0
for data in response.stream(amt=1024*1024):
file_part_data.write(data)
total_written += len(data)
# Verify if we wrote data properly.
if total_written < content_size:
msg = 'Data written {0} bytes is smaller than the' \
'specified size {1} bytes'.format(total_written,
content_size)
raise InvalidSizeError(msg)
if total_written > content_size:
msg = 'Data written {0} bytes is in excess than the' \
'specified size {1} bytes'.format(total_written,
content_size)
raise InvalidSizeError(msg)
# Rename with destination file.
os.rename(file_part_path, file_path)
def get_object(self, bucket_name, object_name):
"""
Retrieves an object from a bucket.
Examples:
my_object = minio.get_partial_object('foo', 'bar')
:param bucket_name: Bucket to read object from
:param object_name: Name of object to read
:return: :class:`urllib3.response.HTTPResponse` object.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
return self._get_partial_object(bucket_name,
object_name)
def get_partial_object(self, bucket_name, object_name, offset=0, length=0):
"""
Retrieves an object from a bucket.
Optionally takes an offset and length of data to retrieve.
Examples:
partial_object = minio.get_partial_object('foo', 'bar', 2, 4)
:param bucket_name: Bucket to retrieve object from
:param object_name: Name of object to retrieve
:param offset: Optional offset to retrieve bytes from.
Must be >= 0.
:param length: Optional number of bytes to retrieve.
Must be an integer.
:return: :class:`urllib3.response.HTTPResponse` object.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
return self._get_partial_object(bucket_name,
object_name,
offset, length)
def copy_object(self, bucket_name, object_name, object_source,
conditions=None):
"""
Copy a source object on object storage server to a new object.
NOTE: Maximum object size supported by this API is 5GB.
Examples:
:param bucket_name: Bucket of new object.
:param object_name: Name of new object.
:param object_source: Source object to be copied.
:param conditions: :class:`CopyConditions` object. Collection of
supported CopyObject conditions.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
is_non_empty_string(object_source)
headers = {}
if conditions:
headers = {k: v for k, v in conditions.items()}
headers['X-Amz-Copy-Source'] = urlencode(object_source)
response = self._url_open('PUT',
bucket_name=bucket_name,
object_name=object_name,
headers=headers)
return parse_copy_object(bucket_name, object_name, response.data)
def put_object(self, bucket_name, object_name, data, length,
content_type='application/octet-stream'):
"""
Add a new object to the cloud storage server.
NOTE: Maximum object size supported by this API is 5TiB.
Examples:
file_stat = os.stat('hello.txt')
with open('hello.txt', 'rb') as data:
minio.put_object('foo', 'bar', data, file_stat.size, 'text/plain')
- For length lesser than 5MB put_object automatically
does single Put operation.
- For length larger than 5MB put_object automatically
does resumable multipart operation.
:param bucket_name: Bucket of new object.
:param object_name: Name of new object.
:param data: Contents to upload.
:param length: Total length of object.
:param content_type: mime type of object as a string.
:return: None
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
if not callable(getattr(data, 'read')):
raise ValueError('Invalid input data does not implement a callable read() method')
if length > MAX_MULTIPART_OBJECT_SIZE:
raise InvalidArgumentError('Input content size is bigger '
' than allowed maximum of 5TiB.')
if length > MIN_OBJECT_SIZE:
return self._stream_put_object(bucket_name, object_name,
data, length,
content_type=content_type)
current_data = data.read(length)
if len(current_data) != length:
raise InvalidArgumentError(
'Could not read {} bytes from data to upload'.format(length)
)
return self._do_put_object(bucket_name, object_name,
current_data,
content_type=content_type)
def list_objects(self, bucket_name, prefix=None, recursive=False):
"""
List objects in the given bucket.
Examples:
objects = minio.list_objects('foo')
for current_object in objects:
print(current_object)
# hello
# hello/
# hello/
# world/
objects = minio.list_objects('foo', prefix='hello/')
for current_object in objects:
print(current_object)
# hello/world/
objects = minio.list_objects('foo', recursive=True)
for current_object in objects:
print(current_object)
# hello/world/1
# world/world/2
# ...
objects = minio.list_objects('foo', prefix='hello/',
recursive=True)
for current_object in objects:
print(current_object)
# hello/world/1
# hello/world/2
:param bucket_name: Bucket to list objects from
:param prefix: String specifying objects returned must begin with
:param recursive: If yes, returns all objects for a specified prefix
:return: An iterator of objects in alphabetical order.
"""
is_valid_bucket_name(bucket_name)
method = 'GET'
# Initialize query parameters.
query = {
'max-keys': 1000
}
# Add if prefix present.
if prefix:
query['prefix'] = prefix
# Delimited by default.
if not recursive:
query['delimiter'] = '/'
marker = ''
is_truncated = True
while is_truncated:
if marker:
query['marker'] = marker
headers = {}
response = self._url_open(method,
bucket_name=bucket_name,
query=query,
headers=headers)
objects, is_truncated, marker = parse_list_objects(response.data,
bucket_name=bucket_name)
for obj in objects:
yield obj
def list_objects_v2(self, bucket_name, prefix=None, recursive=False):
"""
List objects in the given bucket using the List objects V2 API.
Examples:
objects = minio.list_objects_v2('foo')
for current_object in objects:
print(current_object)
# hello
# hello/
# hello/
# world/
objects = minio.list_objects_v2('foo', prefix='hello/')
for current_object in objects:
print(current_object)
# hello/world/
objects = minio.list_objects_v2('foo', recursive=True)
for current_object in objects:
print(current_object)
# hello/world/1
# world/world/2
# ...
objects = minio.list_objects_v2('foo', prefix='hello/',
recursive=True)
for current_object in objects:
print(current_object)
# hello/world/1
# hello/world/2
:param bucket_name: Bucket to list objects from
:param prefix: String specifying objects returned must begin with
:param recursive: If yes, returns all objects for a specified prefix
:return: An iterator of objects in alphabetical order.
"""
is_valid_bucket_name(bucket_name)
# Initialize query parameters.
query = {
'list-type': 2
}
# Add if prefix present.
if prefix:
query['prefix'] = prefix
# Delimited by default.
if not recursive:
query['delimiter'] = '/'
continuation_token = None
is_truncated = True
while is_truncated:
if continuation_token is not None:
query['continuation-token'] = continuation_token
response = self._url_open(method='GET',
bucket_name=bucket_name,
query=query,
headers={})
objects, is_truncated, continuation_token = parse_list_objects_v2(
response.data, bucket_name=bucket_name
)
for obj in objects:
yield obj
def stat_object(self, bucket_name, object_name):
"""
Check if an object exists.
:param bucket_name: Bucket of object.
:param object_name: Name of object
:return: Object metadata if object exists
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
response = self._url_open('HEAD', bucket_name=bucket_name,
object_name=object_name, headers={})
etag = response.headers.get('etag', '').replace('"', '')
size = int(response.headers.get('content-length', '0'))
content_type = response.headers.get('content-type', '')
last_modified = response.headers.get('last-modified')
if last_modified:
http_time_format = "%a, %d %b %Y %H:%M:%S GMT"
last_modified = mktime(strptime(last_modified, http_time_format))
return Object(bucket_name, object_name, content_type=content_type,
last_modified=last_modified, etag=etag, size=size)
def remove_object(self, bucket_name, object_name):
"""
Remove an object from the bucket.
:param bucket_name: Bucket of object to remove
:param object_name: Name of object to remove
:return: None
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
# No reason to store successful response, for errors
# relevant exceptions are thrown.
self._url_open('DELETE', bucket_name=bucket_name,
object_name=object_name, headers={})
def _process_remove_objects_batch(self, bucket_name, objects_batch):
"""
Requester and response parser for remove_objects
"""
# assemble request content for objects_batch
content = xml_marshal_delete_objects(objects_batch)
# compute headers