234 lines
10 KiB
Python
234 lines
10 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import copy
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from openstack.object_store import object_store_service
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from openstack.object_store.v1 import _base
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from openstack import resource
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class Object(_base.BaseResource):
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_custom_metadata_prefix = "X-Object-Meta-"
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_system_metadata = {
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"content_disposition": "content-disposition",
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"content_encoding": "content-encoding",
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"content_type": "content-type",
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"delete_after": "x-delete-after",
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"delete_at": "x-delete-at",
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"is_content_type_detected": "x-detect-content-type",
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}
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base_path = "/%(container)s"
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service = object_store_service.ObjectStoreService()
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id_attribute = "name"
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allow_create = True
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allow_retrieve = True
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allow_update = True
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allow_delete = True
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allow_list = True
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allow_head = True
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# Data to be passed during a POST call to create an object on the server.
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data = None
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# URL parameters
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#: The unique name for the container.
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container = resource.prop("container")
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#: The unique name for the object.
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name = resource.prop("name")
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# Object details
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hash = resource.prop("hash")
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bytes = resource.prop("bytes")
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# Headers for HEAD and GET requests
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#: If set to True, Object Storage queries all replicas to return
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#: the most recent one. If you omit this header, Object Storage
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#: responds faster after it finds one valid replica. Because
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#: setting this header to True is more expensive for the back end,
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#: use it only when it is absolutely needed. *Type: bool*
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is_newest = resource.header("x-newest", type=bool)
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#: TODO(briancurtin) there's a lot of content here...
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range = resource.header("range", type=dict)
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#: See http://www.ietf.org/rfc/rfc2616.txt.
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if_match = resource.header("if-match", type=dict)
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#: In combination with Expect: 100-Continue, specify an
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#: "If-None-Match: \*" header to query whether the server already
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#: has a copy of the object before any data is sent.
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if_none_match = resource.header("if-none-match", type=dict)
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#: See http://www.ietf.org/rfc/rfc2616.txt.
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if_modified_since = resource.header("if-modified-since", type=dict)
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#: See http://www.ietf.org/rfc/rfc2616.txt.
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if_unmodified_since = resource.header("if-unmodified-since", type=dict)
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# Query parameters
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#: Used with temporary URLs to sign the request. For more
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#: information about temporary URLs, see OpenStack Object Storage
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#: API v1 Reference.
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signature = resource.header("signature")
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#: Used with temporary URLs to specify the expiry time of the
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#: signature. For more information about temporary URLs, see
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#: OpenStack Object Storage API v1 Reference.
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expires_at = resource.header("expires")
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#: If you include the multipart-manifest=get query parameter and
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#: the object is a large object, the object contents are not
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#: returned. Instead, the manifest is returned in the
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#: X-Object-Manifest response header for dynamic large objects
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#: or in the response body for static large objects.
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multipart_manifest = resource.header("multipart-manifest")
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# Response headers from HEAD and GET
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#: HEAD operations do not return content. However, in this
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#: operation the value in the Content-Length header is not the
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#: size of the response body. Instead it contains the size of
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#: the object, in bytes.
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content_length = resource.header("content-length")
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#: The MIME type of the object.
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content_type = resource.header("content-type")
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#: The type of ranges that the object accepts.
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accept_ranges = resource.header("accept-ranges")
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#: For objects smaller than 5 GB, this value is the MD5 checksum
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#: of the object content. The value is not quoted.
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#: For manifest objects, this value is the MD5 checksum of the
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#: concatenated string of MD5 checksums and ETags for each of
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#: the segments in the manifest, and not the MD5 checksum of
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#: the content that was downloaded. Also the value is enclosed
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#: in double-quote characters.
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#: You are strongly recommended to compute the MD5 checksum of
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#: the response body as it is received and compare this value
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#: with the one in the ETag header. If they differ, the content
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#: was corrupted, so retry the operation.
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etag = resource.header("etag")
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#: Set to True if this object is a static large object manifest object.
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#: *Type: bool*
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is_static_large_object = resource.header("x-static-large-object",
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type=bool)
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#: If set, the value of the Content-Encoding metadata.
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#: If not set, this header is not returned by this operation.
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content_encoding = resource.header("content-encoding")
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#: If set, specifies the override behavior for the browser.
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#: For example, this header might specify that the browser use
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#: a download program to save this file rather than show the file,
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#: which is the default.
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#: If not set, this header is not returned by this operation.
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content_disposition = resource.header("content-disposition")
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#: Specifies the number of seconds after which the object is
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#: removed. Internally, the Object Storage system stores this
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#: value in the X-Delete-At metadata item.
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delete_after = resource.header("x-delete-after", type=int)
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#: If set, the time when the object will be deleted by the system
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#: in the format of a UNIX Epoch timestamp.
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#: If not set, this header is not returned by this operation.
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delete_at = resource.header("x-delete-at")
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#: If set, to this is a dynamic large object manifest object.
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#: The value is the container and object name prefix of the
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#: segment objects in the form container/prefix.
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object_manifest = resource.header("x-object-manifest")
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#: The timestamp of the transaction.
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timestamp = resource.header("x-timestamp")
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#: The date and time that the object was created or the last
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#: time that the metadata was changed.
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last_modified_at = resource.header("last_modified", alias="last-modified")
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# Headers for PUT and POST requests
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#: Set to chunked to enable chunked transfer encoding. If used,
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#: do not set the Content-Length header to a non-zero value.
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transfer_encoding = resource.header("transfer-encoding")
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#: If set to true, Object Storage guesses the content type based
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#: on the file extension and ignores the value sent in the
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#: Content-Type header, if present. *Type: bool*
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is_content_type_detected = resource.header("x-detect-content-type",
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type=bool)
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#: If set, this is the name of an object used to create the new
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#: object by copying the X-Copy-From object. The value is in form
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#: {container}/{object}. You must UTF-8-encode and then URL-encode
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#: the names of the container and object before you include them
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#: in the header.
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#: Using PUT with X-Copy-From has the same effect as using the
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#: COPY operation to copy an object.
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copy_from = resource.header("x-copy-from")
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# The Object Store treats the metadata for its resources inconsistently so
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# Object.set_metadata must override the BaseResource.set_metadata to
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# account for it.
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def set_metadata(self, session, metadata):
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# Filter out items with empty values so the create metadata behaviour
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# is the same as account and container
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filtered_metadata = \
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{key: value for key, value in metadata.items() if value}
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# Get a copy of the original metadata so it doesn't get erased on POST
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# and update it with the new metadata values.
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obj = self.head(session)
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metadata2 = copy.deepcopy(obj.metadata)
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metadata2.update(filtered_metadata)
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# Include any original system metadata so it doesn't get erased on POST
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for key in self._system_metadata:
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value = getattr(obj, key)
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if value and key not in metadata2:
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metadata2[key] = value
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super(Object, self).set_metadata(session, metadata2)
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# The Object Store treats the metadata for its resources inconsistently so
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# Object.delete_metadata must override the BaseResource.delete_metadata to
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# account for it.
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def delete_metadata(self, session, keys):
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# Get a copy of the original metadata so it doesn't get erased on POST
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# and update it with the new metadata values.
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obj = self.head(session)
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metadata = copy.deepcopy(obj.metadata)
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# Include any original system metadata so it doesn't get erased on POST
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for key in self._system_metadata:
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value = getattr(obj, key)
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if value:
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metadata[key] = value
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# Remove the metadata
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for key in keys:
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if key == 'delete_after':
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del(metadata['delete_at'])
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else:
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del(metadata[key])
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url = self._get_url(self, self.id)
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session.post(url, endpoint_filter=self.service,
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headers=self._calculate_headers(metadata))
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def get(self, session, include_headers=False, args=None):
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url = self._get_url(self, self.id)
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headers = {'Accept': 'bytes'}
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resp = session.get(url, endpoint_filter=self.service, headers=headers)
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resp = resp.content
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self._set_metadata()
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return resp
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def create(self, session):
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url = self._get_url(self, self.id)
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headers = self.get_headers()
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headers['Accept'] = ''
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if self.data is not None:
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resp = session.put(url, endpoint_filter=self.service,
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data=self.data,
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headers=headers).headers
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else:
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resp = session.post(url, endpoint_filter=self.service, data=None,
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headers=headers).headers
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self.set_headers(resp)
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return self
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