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# -------------------------------------------------------------------------
# Copyright (c) Microsoft. All rights reserved.
#
# 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.
# --------------------------------------------------------------------------
from ..common.sharedaccesssignature import (
SharedAccessSignature,
_SharedAccessHelper,
)
from ..common._common_conversion import (
_to_str,
)
from ._constants import X_MS_VERSION
class FileSharedAccessSignature(SharedAccessSignature):
'''
Provides a factory for creating file and share access
signature tokens with a common account name and account key. Users can either
use the factory or can construct the appropriate service and use the
generate_*_shared_access_signature method directly.
'''
def __init__(self, account_name, account_key):
'''
:param str account_name:
The storage account name used to generate the shared access signatures.
:param str account_key:
The access key to generate the shares access signatures.
'''
super(FileSharedAccessSignature, self).__init__(account_name, account_key, x_ms_version=X_MS_VERSION)
def generate_file(self, share_name, directory_name=None, file_name=None,
permission=None, expiry=None, start=None, id=None,
ip=None, protocol=None, cache_control=None,
content_disposition=None, content_encoding=None,
content_language=None, content_type=None):
'''
Generates a shared access signature for the file.
Use the returned signature with the sas_token parameter of FileService.
:param str share_name:
Name of share.
:param str directory_name:
Name of directory. SAS tokens cannot be created for directories, so
this parameter should only be present if file_name is provided.
:param str file_name:
Name of file.
:param FilePermissions permission:
The permissions associated with the shared access signature. The
user is restricted to operations allowed by the permissions.
Permissions must be ordered read, create, write, delete, list.
Required unless an id is given referencing a stored access policy
which contains this field. This field must be omitted if it has been
specified in an associated stored access policy.
:param expiry:
The time at which the shared access signature becomes invalid.
Required unless an id is given referencing a stored access policy
which contains this field. This field must be omitted if it has
been specified in an associated stored access policy. Azure will always
convert values to UTC. If a date is passed in without timezone info, it
is assumed to be UTC.
:type expiry: datetime or str
:param start:
The time at which the shared access signature becomes valid. If
omitted, start time for this call is assumed to be the time when the
storage service receives the request. Azure will always convert values
to UTC. If a date is passed in without timezone info, it is assumed to
be UTC.
:type start: datetime or str
:param str id:
A unique value up to 64 characters in length that correlates to a
stored access policy. To create a stored access policy, use
set_file_service_properties.
:param str ip:
Specifies an IP address or a range of IP addresses from which to accept requests.
If the IP address from which the request originates does not match the IP address
or address range specified on the SAS token, the request is not authenticated.
For example, specifying sip=168.1.5.65 or sip=168.1.5.60-168.1.5.70 on the SAS
restricts the request to those IP addresses.
:param str protocol:
Specifies the protocol permitted for a request made. The default value
is https,http. See :class:`~azure.storage.common.models.Protocol` for possible values.
:param str cache_control:
Response header value for Cache-Control when resource is accessed
using this shared access signature.
:param str content_disposition:
Response header value for Content-Disposition when resource is accessed
using this shared access signature.
:param str content_encoding:
Response header value for Content-Encoding when resource is accessed
using this shared access signature.
:param str content_language:
Response header value for Content-Language when resource is accessed
using this shared access signature.
:param str content_type:
Response header value for Content-Type when resource is accessed
using this shared access signature.
'''
resource_path = share_name
if directory_name is not None:
resource_path += '/' + _to_str(directory_name)
resource_path += '/' + _to_str(file_name)
sas = _SharedAccessHelper()
sas.add_base(permission, expiry, start, ip, protocol, self.x_ms_version)
sas.add_id(id)
sas.add_resource('f')
sas.add_override_response_headers(cache_control, content_disposition,
content_encoding, content_language,
content_type)
sas.add_resource_signature(self.account_name, self.account_key, 'file', resource_path)
return sas.get_token()
def generate_share(self, share_name, permission=None, expiry=None,
start=None, id=None, ip=None, protocol=None,
cache_control=None, content_disposition=None,
content_encoding=None, content_language=None,
content_type=None):
'''
Generates a shared access signature for the share.
Use the returned signature with the sas_token parameter of FileService.
:param str share_name:
Name of share.
:param SharePermissions permission:
The permissions associated with the shared access signature. The
user is restricted to operations allowed by the permissions.
Permissions must be ordered read, create, write, delete, list.
Required unless an id is given referencing a stored access policy
which contains this field. This field must be omitted if it has been
specified in an associated stored access policy.
:param expiry:
The time at which the shared access signature becomes invalid.
Required unless an id is given referencing a stored access policy
which contains this field. This field must be omitted if it has
been specified in an associated stored access policy. Azure will always
convert values to UTC. If a date is passed in without timezone info, it
is assumed to be UTC.
:type expiry: datetime or str
:param start:
The time at which the shared access signature becomes valid. If
omitted, start time for this call is assumed to be the time when the
storage service receives the request. Azure will always convert values
to UTC. If a date is passed in without timezone info, it is assumed to
be UTC.
:type start: datetime or str
:param str id:
A unique value up to 64 characters in length that correlates to a
stored access policy. To create a stored access policy, use
set_file_service_properties.
:param str ip:
Specifies an IP address or a range of IP addresses from which to accept requests.
If the IP address from which the request originates does not match the IP address
or address range specified on the SAS token, the request is not authenticated.
For example, specifying sip=168.1.5.65 or sip=168.1.5.60-168.1.5.70 on the SAS
restricts the request to those IP addresses.
:param str protocol:
Specifies the protocol permitted for a request made. The default value
is https,http. See :class:`~azure.storage.common.models.Protocol` for possible values.
:param str cache_control:
Response header value for Cache-Control when resource is accessed
using this shared access signature.
:param str content_disposition:
Response header value for Content-Disposition when resource is accessed
using this shared access signature.
:param str content_encoding:
Response header value for Content-Encoding when resource is accessed
using this shared access signature.
:param str content_language:
Response header value for Content-Language when resource is accessed
using this shared access signature.
:param str content_type:
Response header value for Content-Type when resource is accessed
using this shared access signature.
'''
sas = _SharedAccessHelper()
sas.add_base(permission, expiry, start, ip, protocol, self.x_ms_version)
sas.add_id(id)
sas.add_resource('s')
sas.add_override_response_headers(cache_control, content_disposition,
content_encoding, content_language,
content_type)
sas.add_resource_signature(self.account_name, self.account_key, 'file', share_name)
return sas.get_token()
|
