libcloud.storage package

Subpackages

• libcloud.storage.drivers package
  • Submodules
  • libcloud.storage.drivers.atmos module
  • libcloud.storage.drivers.auroraobjects module
  • libcloud.storage.drivers.azure_blobs module
  • libcloud.storage.drivers.cloudfiles module
  • libcloud.storage.drivers.dummy module
  • libcloud.storage.drivers.google_storage module
  • libcloud.storage.drivers.ktucloud module
  • libcloud.storage.drivers.local module
  • libcloud.storage.drivers.nimbus module
  • libcloud.storage.drivers.ninefold module
  • libcloud.storage.drivers.s3 module
  • Module contents

Submodules

libcloud.storage.base module

Provides base classes for working with storage

class libcloud.storage.base.Object(name, size, hash, extra, meta_data, container, driver)

Bases: object

Represents an object (BLOB).

Parameters:

• name (str) – Object name (must be unique per container).
• size (int) – Object size in bytes.
• hash (str) – Object hash.
• container (Container) – Object container.
• extra (dict) – Extra attributes.
• meta_data (dict) – Optional object meta data.
• driver (StorageDriver) – StorageDriver instance.

as_stream(chunk_size=None)

delete()

download(destination_path, overwrite_existing=False, delete_on_failure=True)

enable_cdn(**kwargs)

get_cdn_url()

class libcloud.storage.base.Container(name, extra, driver)

Bases: object

Represents a container (bucket) which can hold multiple objects.

Parameters:

• name (str) – Container name (must be unique).
• extra (dict) – Extra attributes.
• driver (StorageDriver) – StorageDriver instance.

delete()

delete_object(obj)

download_object(obj, destination_path, overwrite_existing=False, delete_on_failure=True)

download_object_as_stream(obj, chunk_size=None)

enable_cdn(**kwargs)

get_cdn_url()

get_object(object_name)

iterate_objects()

list_objects()

upload_object(file_path, object_name, extra=None, **kwargs)

upload_object_via_stream(iterator, object_name, extra=None, **kwargs)

class libcloud.storage.base.StorageDriver(key, secret=None, secure=True, host=None, port=None, **kwargs)

Bases: libcloud.common.base.BaseDriver

A base StorageDriver to derive from.

connectionCls

alias of ConnectionUserAndKey

create_container(container_name)

Create a new container.

Parameters:container_name (str) – Container name. Returns:Container instance on success. Return type:Container

delete_container(container)

Delete a container.

Parameters:container (Container) – Container instance Returns:True on success, False otherwise. Return type:bool

delete_object(obj)

Delete an object.

Parameters:obj (Object) – Object instance. Returns:bool True on success. Return type:bool

download_object(obj, destination_path, overwrite_existing=False, delete_on_failure=True)

Download an object to the specified destination path.

Parameters:

• obj (Object) – Object instance.
• destination_path (str) – Full path to a file or a directory where the incoming file will be saved.
• overwrite_existing (bool) – True to overwrite an existing file, defaults to False.
• delete_on_failure (bool) – True to delete a partially downloaded file if the download was not successful (hash mismatch / file size).

Returns:

True if an object has been successfully downloaded, False otherwise.

Return type:

bool

download_object_as_stream(obj, chunk_size=None)

Return a generator which yields object data.

Parameters:

• obj (Object) – Object instance
• chunk_size (int) – Optional chunk size (in bytes).

enable_container_cdn(container)

Enable container CDN.

Parameters:container (Container) – Container instance Return type:bool

enable_object_cdn(obj)

Enable object CDN.

Parameters:obj (Object) – Object instance Return type:bool

get_container(container_name)

Return a container instance.

Parameters:container_name (str) – Container name. Returns:Container instance. Return type:Container

get_container_cdn_url(container)

Return a container CDN URL.

Parameters:container (Container) – Container instance Returns:A CDN URL for this container. Return type:str

get_object(container_name, object_name)

Return an object instance.

Parameters:

• container_name (str) – Container name.
• object_name (str) – Object name.

Returns:

Object instance.

Return type:

Object

get_object_cdn_url(obj)

Return an object CDN URL.

Parameters:obj (Object) – Object instance Returns:A CDN URL for this object. Return type:str

hash_type = 'md5'

iterate_container_objects(container)

Return a generator of objects for the given container.

Parameters:container (Container) – Container instance Returns:A generator of Object instances. Return type:generator of Object

iterate_containers()

Return a generator of containers for the given account

Returns:A generator of Container instances. Return type:generator of Container

list_container_objects(container)

Return a list of objects for the given container.

Parameters:container (Container) – Container instance. Returns:A list of Object instances. Return type:list of Object

list_containers()

Return a list of containers.

Returns:A list of Container instances. Return type:list of Container

name = None

strict_mode = False

supports_chunked_encoding = False

upload_object(file_path, container, object_name, extra=None, verify_hash=True, headers=None)

Upload an object currently located on a disk.

Parameters:

• file_path (str) – Path to the object on disk.
• container (Container) – Destination container.
• object_name (str) – Object name.
• verify_hash (bool) – Verify hash
• extra (dict) – Extra attributes (driver specific). (optional)
• headers (dict) – (optional) Additional request headers, such as CORS headers. For example: headers = {‘Access-Control-Allow-Origin’: ‘http://mozilla.com‘}

Return type:

Object

upload_object_via_stream(iterator, container, object_name, extra=None, headers=None)

Upload an object using an iterator.

If a provider supports it, chunked transfer encoding is used and you don’t need to know in advance the amount of data to be uploaded.

Otherwise if a provider doesn’t support it, iterator will be exhausted so a total size for data to be uploaded can be determined.

Note: Exhausting the iterator means that the whole data must be buffered in memory which might result in memory exhausting when uploading a very large object.

If a file is located on a disk you are advised to use upload_object function which uses fs.stat function to determine the file size and it doesn’t need to buffer whole object in the memory.

Parameters:

• iterator (object) – An object which implements the iterator interface.
• container (Container) – Destination container.
• object_name (str) – Object name.
• extra (dict) – (optional) Extra attributes (driver specific). Note: This dictionary must contain a ‘content_type’ key which represents a content type of the stored object.
• headers (dict) – (optional) Additional request headers, such as CORS headers. For example: headers = {‘Access-Control-Allow-Origin’: ‘http://mozilla.com‘}

Return type:

object

libcloud.storage.providers module

libcloud.storage.providers.get_driver(provider)

libcloud.storage.providers.set_driver(provider, module, klass)

libcloud.storage.types module

class libcloud.storage.types.Provider

Bases: object

Defines for each of the supported providers

Variables:

• DUMMY – Example provider
• CLOUDFILES – CloudFiles
• S3 – Amazon S3 US
• S3_US_WEST – Amazon S3 US West (Northern California)
• S3_EU_WEST – Amazon S3 EU West (Ireland)
• S3_AP_SOUTHEAST_HOST – Amazon S3 Asia South East (Singapore)
• S3_AP_NORTHEAST_HOST – Amazon S3 Asia South East (Tokyo)
• NINEFOLD – Ninefold

:cvar GOOGLE_STORAGE Google Storage :cvar S3_US_WEST_OREGON: Amazon S3 US West 2 (Oregon) :cvar NIMBUS: Nimbus.io driver :cvar LOCAL: Local storage driver :cvar AURORAOBJECTS: AuroraObjects storage driver

AURORAOBJECTS = 'auroraobjects'

AZURE_BLOBS = 'azure_blobs'

CLOUDFILES = 'cloudfiles'

CLOUDFILES_SWIFT = 'cloudfiles_swift'

CLOUDFILES_UK = 'cloudfiles_uk'

CLOUDFILES_US = 'cloudfiles_us'

DUMMY = 'dummy'

GOOGLE_STORAGE = 'google_storage'

KTUCLOUD = 'ktucloud'

LOCAL = 'local'

NIMBUS = 'nimbus'

NINEFOLD = 'ninefold'

OPENSTACK_SWIFT = 'openstack_swift'

S3 = 's3'

S3_AP_NORTHEAST = 's3_ap_northeast'

S3_AP_SOUTHEAST = 's3_ap_southeast'

S3_EU_WEST = 's3_eu_west'

S3_US_WEST = 's3_us_west'

S3_US_WEST_OREGON = 's3_us_west_oregon'

exception libcloud.storage.types.ContainerError(value, driver, container_name)

Bases: libcloud.common.types.LibcloudError

error_type = 'ContainerError'

exception libcloud.storage.types.ObjectError(value, driver, object_name)

Bases: libcloud.common.types.LibcloudError

error_type = 'ContainerError'

exception libcloud.storage.types.ContainerAlreadyExistsError(value, driver, container_name)

Bases: libcloud.storage.types.ContainerError

error_type = 'ContainerAlreadyExistsError'

exception libcloud.storage.types.ContainerDoesNotExistError(value, driver, container_name)

Bases: libcloud.storage.types.ContainerError

error_type = 'ContainerDoesNotExistError'

exception libcloud.storage.types.ContainerIsNotEmptyError(value, driver, container_name)

Bases: libcloud.storage.types.ContainerError

error_type = 'ContainerIsNotEmptyError'

exception libcloud.storage.types.ObjectDoesNotExistError(value, driver, object_name)

Bases: libcloud.storage.types.ObjectError

error_type = 'ObjectDoesNotExistError'

exception libcloud.storage.types.ObjectHashMismatchError(value, driver, object_name)

Bases: libcloud.storage.types.ObjectError

error_type = 'ObjectHashMismatchError'

exception libcloud.storage.types.InvalidContainerNameError(value, driver, container_name)

Bases: libcloud.storage.types.ContainerError

error_type = 'InvalidContainerNameError'

Module contents

Module for working with Storage