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1517 lines (1251 loc) · 57.4 KB
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# -*- coding: utf-8 -*-
# Minio Python Library for Amazon S3 Compatible Cloud Storage, (C) 2015 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 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 os
import hashlib
# Dependencies
import urllib3
import certifi
import pytz
# Internal imports
from . import __title__, __version__
from .compat import urlsplit, range
from .error import ResponseError, InvalidArgumentError, InvalidSizeError
from .definitions import Object, UploadPart
from .parsers import (parse_list_buckets,
parse_list_objects,
parse_list_parts,
parse_list_multipart_uploads,
parse_new_multipart_upload,
parse_location_constraint,
parse_multipart_upload_result)
from .helpers import (get_target_url, is_non_empty_string,
is_valid_endpoint,
get_sha256, encode_to_base64, get_md5,
optimal_part_info, encode_to_hex,
is_valid_bucket_name, parts_manager,
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)
from .limited_reader import LimitedReader
# 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'
headers = {}
# Set user agent once before the request.
headers['User-Agent'] = self._user_agent
content = ''
if location and location != 'us-east-1':
content = xml_marshal_bucket_constraint(location)
headers['Content-Length'] = str(len(content))
content_sha256_hex = encode_to_hex(get_sha256(content))
if content.strip():
content_md5_base64 = encode_to_base64(get_md5(content))
headers['Content-MD5'] = content_md5_base64
# 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'
headers = {}
url = get_target_url(self._endpoint_url)
# Set user agent once before the request.
headers['User-Agent'] = self._user_agent
# default for all requests.
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)
method = 'HEAD'
headers = {}
try:
self._url_open(method, bucket_name=bucket_name,
headers=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
8
return T
10BC8
rue
def remove_bucket(self, bucket_name):
"""
Remove a bucket.
:param bucket_name: Bucket to remove
"""
is_valid_bucket_name(bucket_name)
method = 'DELETE'
headers = {}
self._url_open(method, bucket_name=bucket_name,
headers=headers)
# Make sure to purge bucket_name from region cache.
self._delete_bucket_region(bucket_name)
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 the upload id is requested for.
: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)
upload_id = None
# Default to '0'th epoch.
latest_initiated_time = datetime.fromtimestamp(0, pytz.utc)
for upload in current_uploads:
if object_name == upload.object_name:
latest_initiated_time = max((upload.initiated,
latest_initiated_time))
upload_id = upload.upload_id
# If upload_id is None its a new multipart upload.
if not upload_id:
upload_id = self._new_multipart_upload(bucket_name,
object_name,
content_type)
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:
data = file_data.read(file_size)
md5_base64 = encode_to_base64(get_md5(data))
sha256_hex = encode_to_hex(get_sha256(data))
return self._do_put_object(bucket_name, object_name,
io.BytesIO(data),
md5_base64,
sha256_hex,
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 = hashlib.md5()
sha256hasher = hashlib.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 = total_read + len(current_data)
part_md5_hex = encode_to_hex(md5hasher.digest())
# 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
# Save hexlified sha256.
part_sha256_hex = encode_to_hex(sha256hasher.digest())
# Save base64 md5sum.
part_md5_base64 = encode_to_base64(md5hasher.digest())
# 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)
# Initiate multipart put.
etag = self._do_put_multipart_object(bucket_name, object_name,
part, part_md5_base64,
part_sha256_hex, total_read,
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)
file_is_dir = os.path.isdir(file_path)
if file_is_dir:
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-py" 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)
# Close the file.
file_part_data.close()
# 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)
response = self._get_partial_object(bucket_name,
object_name)
return response
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)
response = self._get_partial_object(bucket_name,
object_name,
offset, length)
return response
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)
data_md5_base64 = encode_to_base64(get_md5(current_data))
data_sha256_hex = encode_to_hex(get_sha256(current_data))
return self._do_put_object(bucket_name, object_name,
io.BytesIO(current_data),
data_md5_base64,
data_sha256_hex,
length,
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 = {}
query['max-keys'] = 1000
# Add if prefix present.
if prefix:
query['prefix'] = prefix
# Delimited by default.
query['delimiter'] = '/'
if recursive:
del 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 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)
method = 'HEAD'
headers = {}
response = self._url_open(method, bucket_name=bucket_name,
object_name=object_name,
headers=headers)
http_time_format = "%a, %d %b %Y %H:%M:%S GMT"
etag = ''
size = 0
content_type = ''
last_modified = None
if 'etag' in response.headers:
etag = response.headers['etag'].replace('"', '')
if 'content-length' in response.headers:
size = int(response.headers['content-length'])
if 'content-type' in response.headers:
content_type = response.headers['content-type']
if 'last-modified' in response.headers:
last_modified = mktime(strptime(response.headers['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)
method = 'DELETE'
headers = {}
# No reason to store successful response, for errors
# relevant exceptions are thrown.
self._url_open(method, bucket_name=bucket_name,
object_name=object_name,
headers=headers)
def list_incomplete_uploads(self, bucket_name, prefix=None,
recursive=False):
"""
List all in-complete uploads for a given bucket.
Examples:
incomplete_uploads = minio.list_incomplete_uploads('foo')
for current_upload in incomplete_uploads:
print(current_upload)
# hello
# hello/
# hello/
# world/
incomplete_uploads = minio.list_incomplete_uploads('foo',
prefix='hello/')
for current_upload in incomplete_uploads:
print(current_upload)
# hello/world/
incomplete_uploads = minio.list_incomplete_uploads('foo',
recursive=True)
for current_upload in incomplete_uploads:
print(current_upload)
# hello/world/1
# world/world/2
# ...
incomplete_uploads = minio.list_incomplete_uploads('foo',
prefix='hello/',
recursive=True)
for current_upload in incomplete_uploads:
print(current_upload)
# hello/world/1
# hello/world/2
:param bucket_name: Bucket to list incomplete uploads
:param prefix: String specifying objects returned must begin with.
:param recursive: If yes, returns all incomplete uploads for
a specified prefix.
:return: An generator of incomplete uploads in alphabetical order.
"""
is_valid_bucket_name(bucket_name)
return self._list_incomplete_uploads(bucket_name, prefix, recursive)
def _list_incomplete_uploads(self, bucket_name, prefix=None, recursive=False, is_aggregate_size=True):
"""
List incomplete uploads list all previously uploaded incomplete multipart objects.
:param bucket_name: Bucket name to list uploaded objects.
:param prefix: String specifying objects returned must begin with.
:param recursive: If yes, returns all incomplete objects for a specified prefix.
:return: An generator of incomplete uploads in alphabetical order.
"""
is_valid_bucket_name(bucket_name)
method = 'GET'
# Initialize query parameters.
query = {
'uploads': None
}
query['max-uploads'] = 1000
if prefix:
query['prefix'] = prefix
# Default is delimited.
query['delimiter'] = '/'
if recursive:
del query['delimiter']
key_marker = ''
upload_id_marker = ''
is_truncated = True
while is_truncated:
headers = {}
if key_marker:
query['key-marker'] = key_marker
if upload_id_marker:
query['upload-id-marker'] = upload_id_marker
response = self._url_open(method,
bucket_name=bucket_name,
query=query,
headers=headers)
uploads, is_truncated, key_marker, upload_id_marker = parse_list_multipart_uploads(response.data,
bucket_name=bucket_name)
for upload in uploads:
if is_aggregate_size:
upload.size = self._get_total_multipart_upload_size(upload.bucket_name,
upload.object_name,
upload.upload_id)
yield upload
def _get_total_multipart_upload_size(self, bucket_name, object_name, upload_id):
"""
Get total multipart upload size.
:param bucket_name: Bucket name to list parts for.
:param object_name: Object name to list parts for.
:param upload_id: Upload id of the previously uploaded object name.
"""
total_part_size = 0
for part in self._list_object_parts(bucket_name, object_name, upload_id):
total_part_size += part.size
return total_part_size
def _list_object_parts(self, bucket_name, object_name, upload_id):
"""
List all parts.
:param bucket_name: Bucket name to list parts for.
:param object_name: Object name to list parts for.
:param upload_id: Upload id of the previously uploaded object name.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
is_non_empty_string(upload_id)
method = 'GET'
query = {
'uploadId': upload_id
}
query['max-parts'] = 1000
is_truncated = True
part_number_marker = None
while is_truncated:
headers = {}
if part_number_marker:
query['part-number-marker'] = part_number_marker
response = self._url_open(method,
bucket_name=bucket_name,
object_name=object_name,
query=query,
headers=headers)
parts, is_truncated, part_number_marker = parse_list_parts(response.data,
bucket_name=bucket_name,
object_name=object_name,
upload_id=upload_id)
for part in parts:
yield part
def remove_incomplete_upload(self, bucket_name, object_name):
"""
Remove all in-complete uploads for a given bucket_name and object_name.
:param bucket_name: Bucket to drop incomplete uploads
:param object_name: Name of object to remove incomplete uploads
:return: None
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
recursive = True
uploads = self._list_incomplete_uploads(bucket_name, object_name,
recursive,
is_aggregate_size=False)
for upload in uploads:
if object_name == upload.object_name:
self._remove_incomplete_upload(bucket_name, object_name,
upload.upload_id)
return
def presigned_get_object(self, bucket_name, object_name,
expires=timedelta(days=7)):
"""
Presigns a get object request and provides a url
Example:
from datetime import timedelta
presignedURL = presigned_get_object('bucket_name',
'object_name',
timedelta(days=7))
print(presignedURL)
:param bucket_name: Bucket for the presigned url.
:param object_name: Object for which presigned url is generated.
:param expires: Optional expires argument to specify timedelta.
Defaults to 7days.
:return: Presigned url.
"""
if expires.total_seconds() < 1 or \
expires.total_seconds() > _SEVEN_DAYS_SECONDS:
raise InvalidArgumentError('Expires param valid values'
' are between 1 secs to'
' {0} secs'.format(_SEVEN_DAYS_SECONDS))
return self._presigned_get_partial_object(bucket_name,
object_name,
expires)
def presigned_put_object(self, bucket_name, object_name,
expires=timedelta(days=7)):
"""
Presigns a put object request and provides a url
Example:
from datetime import timedelta
presignedURL = presigned_put_object('bucket_name',
'object_name',
timedelta(days=7))
print(presignedURL)
:param bucket_name: Bucket for the presigned url.
:param object_name: Object for which presigned url is generated.
:param expires: optional expires argument to specify timedelta.
Defaults to 7days.
:return: Presigned put object url.
"""
is_valid_bucket_name(bucket_name)
is_non_empty_string(object_name)
if expires.total_seconds() < 1 or \
expires.total_seconds() > _SEVEN_DAYS_SECONDS:
raise InvalidArgumentError('Expires param valid values'
' are between 1 secs to'
' {0} secs'.format(_SEVEN_DAYS_SECONDS))
region = self._get_bucket_region(bucket_name)
url = get_target_url(self._endpoint_url,
bucket_name=bucket_name,
object_name=object_name,
bucket_region=region)
headers = {}
method = 'PUT'
presign_url = presign_v4(method, url,
self._access_key,
self._secret_key,
region=region,
headers=headers,
expires=int(expires.total_seconds()))
return presign_url
def presigned_post_policy(self, policy):
"""
Provides a POST form data that can be used for object uploads.
Example:
policy = PostPolicy()
policy.set_bucket_name('bucket_name')
policy.set_key_startswith('objectPrefix/')
expires_date = datetime.utcnow()+timedelta(days=10)