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# Copyright 2010 Google Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
"""
Provides basic mocks of core storage service classes, for unit testing:
ACL, Key, Bucket, Connection, and StorageUri. We implement a subset of
the interfaces defined in the real boto classes, but don't handle most
of the optional params (which we indicate with the constant "NOT_IMPL").
"""
import copy
import boto
import base64
from boto.utils import compute_md5
try:
from hashlib import md5
except ImportError:
from md5 import md5
NOT_IMPL = None
class MockAcl(object):
def __init__(self, parent=NOT_IMPL):
pass
def startElement(self, name, attrs, connection):
pass
def endElement(self, name, value, connection):
pass
def to_xml(self):
return '<mock_ACL_XML/>'
class MockKey(object):
def __init__(self, bucket=None, name=None):
self.bucket = bucket
self.name = name
self.data = None
self.etag = None
self.size = None
self.content_encoding = None
self.content_type = None
self.last_modified = 'Wed, 06 Oct 2010 05:11:54 GMT'
self.BufferSize = 8192
def get_contents_as_string(self, headers=NOT_IMPL,
cb=NOT_IMPL, num_cb=NOT_IMPL,
torrent=NOT_IMPL,
version_id=NOT_IMPL):
return self.data
def get_contents_to_file(self, fp, headers=NOT_IMPL,
cb=NOT_IMPL, num_cb=NOT_IMPL,
torrent=NOT_IMPL,
version_id=NOT_IMPL,
res_download_handler=NOT_IMPL):
fp.write(self.data)
def get_file(self, fp, headers=NOT_IMPL, cb=NOT_IMPL, num_cb=NOT_IMPL,
torrent=NOT_IMPL, version_id=NOT_IMPL,
override_num_retries=NOT_IMPL):
fp.write(self.data)
def _handle_headers(self, headers):
if not headers:
return
if 'Content-Encoding' in headers:
self.content_encoding = headers['Content-Encoding']
if 'Content-Type' in headers:
self.content_type = headers['Content-Type']
def open_read(self, headers=NOT_IMPL, query_args=NOT_IMPL,
override_num_retries=NOT_IMPL):
pass
def set_contents_from_file(self, fp, headers=None, replace=NOT_IMPL,
cb=NOT_IMPL, num_cb=NOT_IMPL,
policy=NOT_IMPL, md5=NOT_IMPL,
res_upload_handler=NOT_IMPL):
self.data = fp.read()
self.set_etag()
self.size = len(self.data)
self._handle_headers(headers)
def set_contents_from_string(self, s, headers=NOT_IMPL, replace=NOT_IMPL,
cb=NOT_IMPL, num_cb=NOT_IMPL, policy=NOT_IMPL,
md5=NOT_IMPL, reduced_redundancy=NOT_IMPL):
self.data = copy.copy(s)
self.set_etag()
self.size = len(s)
self._handle_headers(headers)
def set_contents_from_filename(self, filename, headers=None, replace=NOT_IMPL,
cb=NOT_IMPL, num_cb=NOT_IMPL,
policy=NOT_IMPL, md5=NOT_IMPL,
res_upload_handler=NOT_IMPL):
fp = open(filename, 'rb')
self.set_contents_from_file(fp, headers, replace, cb, num_cb,
policy, md5, res_upload_handler)
fp.close()
def copy(self, dst_bucket_name, dst_key, metadata=NOT_IMPL,
reduced_redundancy=NOT_IMPL, preserve_acl=NOT_IMPL):
dst_bucket = self.bucket.connection.get_bucket(dst_bucket_name)
return dst_bucket.copy_key(dst_key, self.bucket.name,
self.name, metadata)
def set_etag(self):
"""
Set etag attribute by generating hex MD5 checksum on current
contents of mock key.
"""
m = md5()
m.update(self.data)
hex_md5 = m.hexdigest()
self.etag = hex_md5
def compute_md5(self, fp):
"""
:type fp: file
:param fp: File pointer to the file to MD5 hash. The file pointer
will be reset to the beginning of the file before the
method returns.
:rtype: tuple
:return: A tuple containing the hex digest version of the MD5 hash
as the first element and the base64 encoded version of the
plain digest as the second element.
"""
tup = compute_md5(fp)
# Returned values are MD5 hash, base64 encoded MD5 hash, and file size.
# The internal implementation of compute_md5() needs to return the
# file size but we don't want to return that value to the external
# caller because it changes the class interface (i.e. it might
# break some code) so we consume the third tuple value here and
# return the remainder of the tuple to the caller, thereby preserving
# the existing interface.
self.size = tup[2]
return tup[0:2]
class MockBucket(object):
def __init__(self, connection=None, name=None, key_class=NOT_IMPL):
self.name = name
self.keys = {}
self.acls = {name: MockAcl()}
# default object ACLs are one per bucket and not supported for keys
self.def_acl = MockAcl()
self.subresources = {}
self.connection = connection
self.logging = False
def copy_key(self, new_key_name, src_bucket_name,
src_key_name, metadata=NOT_IMPL, src_version_id=NOT_IMPL,
storage_class=NOT_IMPL, preserve_acl=NOT_IMPL):
new_key = self.new_key(key_name=new_key_name)
src_key = mock_connection.get_bucket(
src_bucket_name).get_key(src_key_name)
new_key.data = copy.copy(src_key.data)
new_key.size = len(new_key.data)
return new_key
def disable_logging(self):
self.logging = False
def enable_logging(self, target_bucket_prefix):
self.logging = True
def get_acl(self, key_name='', headers=NOT_IMPL, version_id=NOT_IMPL):
if key_name:
# Return ACL for the key.
return self.acls[key_name]
else:
# Return ACL for the bucket.
return self.acls[self.name]
def get_def_acl(self, key_name=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
# Return default ACL for the bucket.
return self.def_acl
def get_subresource(self, subresource, key_name=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
if subresource in self.subresources:
return self.subresources[subresource]
else:
return '<Subresource/>'
def new_key(self, key_name=None):
mock_key = MockKey(self, key_name)
self.keys[key_name] = mock_key
self.acls[key_name] = MockAcl()
return mock_key
def delete_key(self, key_name, headers=NOT_IMPL,
version_id=NOT_IMPL, mfa_token=NOT_IMPL):
if key_name not in self.keys:
raise boto.exception.StorageResponseError(404, 'Not Found')
del self.keys[key_name]
def get_all_keys(self, headers=NOT_IMPL):
return self.keys.itervalues()
def get_key(self, key_name, headers=NOT_IMPL, version_id=NOT_IMPL):
# Emulate behavior of boto when get_key called with non-existent key.
if key_name not in self.keys:
return None
return self.keys[key_name]
def list(self, prefix='', delimiter=NOT_IMPL, marker=NOT_IMPL,
headers=NOT_IMPL):
# Return list instead of using a generator so we don't get
# 'dictionary changed size during iteration' error when performing
# deletions while iterating (e.g., during test cleanup).
result = []
for k in self.keys.itervalues():
if not prefix:
result.append(k)
elif k.name.startswith(prefix):
result.append(k)
return result
def set_acl(self, acl_or_str, key_name='', headers=NOT_IMPL,
version_id=NOT_IMPL):
# We only handle setting ACL XML here; if you pass a canned ACL
# the get_acl call will just return that string name.
if key_name:
# Set ACL for the key.
self.acls[key_name] = acl_or_str
else:
# Set ACL for the bucket.
self.acls[self.name] = acl_or_str
def set_def_acl(self, acl_or_str, key_name=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
# We only handle setting ACL XML here; if you pass a canned ACL
# the get_acl call will just return that string name.
# Set default ACL for the bucket.
self.def_acl = acl_or_str
def set_subresource(self, subresource, value, key_name=NOT_IMPL,
headers=NOT_IMPL, version_id=NOT_IMPL):
self.subresources[subresource] = value
class MockConnection(object):
def __init__(self, aws_access_key_id=NOT_IMPL,
aws_secret_access_key=NOT_IMPL, is_secure=NOT_IMPL,
port=NOT_IMPL, proxy=NOT_IMPL, proxy_port=NOT_IMPL,
proxy_user=NOT_IMPL, proxy_pass=NOT_IMPL,
host=NOT_IMPL, debug=NOT_IMPL,
https_connection_factory=NOT_IMPL,
calling_format=NOT_IMPL,
path=NOT_IMPL, provider=NOT_IMPL,
bucket_class=NOT_IMPL):
self.buckets = {}
def create_bucket(self, bucket_name, headers=NOT_IMPL, location=NOT_IMPL,
policy=NOT_IMPL):
if bucket_name in self.buckets:
raise boto.exception.StorageCreateError(
409, 'BucketAlreadyOwnedByYou',
"<Message>Your previous request to create the named bucket "
"succeeded and you already own it.</Message>")
mock_bucket = MockBucket(name=bucket_name, connection=self)
self.buckets[bucket_name] = mock_bucket
return mock_bucket
def delete_bucket(self, bucket, headers=NOT_IMPL):
if bucket not in self.buckets:
raise boto.exception.StorageResponseError(
404, 'NoSuchBucket', '<Message>no such bucket</Message>')
del self.buckets[bucket]
def get_bucket(self, bucket_name, validate=NOT_IMPL, headers=NOT_IMPL):
if bucket_name not in self.buckets:
raise boto.exception.StorageResponseError(404, 'NoSuchBucket',
'Not Found')
return self.buckets[bucket_name]
def get_all_buckets(self, headers=NOT_IMPL):
return self.buckets.itervalues()
# We only mock a single provider/connection.
mock_connection = MockConnection()
class MockBucketStorageUri(object):
def __init__(self, scheme, bucket_name=None, object_name=None,
debug=NOT_IMPL, suppress_consec_slashes=NOT_IMPL):
self.scheme = scheme
self.bucket_name = bucket_name
self.object_name = object_name
if self.bucket_name and self.object_name:
self.uri = ('%s://%s/%s' % (self.scheme, self.bucket_name,
self.object_name))
elif self.bucket_name:
self.uri = ('%s://%s/' % (self.scheme, self.bucket_name))
else:
self.uri = ('%s://' % self.scheme)
def __repr__(self):
"""Returns string representation of URI."""
return self.uri
def acl_class(self):
return MockAcl
def canned_acls(self):
return boto.provider.Provider('aws').canned_acls
def clone_replace_name(self, new_name):
return MockBucketStorageUri(self.scheme, self.bucket_name, new_name)
def connect(self, access_key_id=NOT_IMPL, secret_access_key=NOT_IMPL):
return mock_connection
def create_bucket(self, headers=NOT_IMPL, location=NOT_IMPL,
policy=NOT_IMPL):
return self.connect().create_bucket(self.bucket_name)
def delete_bucket(self, headers=NOT_IMPL):
return self.connect().delete_bucket(self.bucket_name)
def delete_key(self, validate=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL, mfa_token=NOT_IMPL):
self.get_bucket().delete_key(self.object_name)
def disable_logging(self, validate=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
self.get_bucket().disable_logging()
def enable_logging(self, target_bucket, target_prefix, validate=NOT_IMPL,
headers=NOT_IMPL, version_id=NOT_IMPL):
self.get_bucket().enable_logging(target_bucket)
def equals(self, uri):
return self.uri == uri.uri
def get_acl(self, validate=NOT_IMPL, headers=NOT_IMPL, version_id=NOT_IMPL):
return self.get_bucket().get_acl(self.object_name)
def get_def_acl(self, validate=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
return self.get_bucket().get_def_acl(self.object_name)
def get_subresource(self, subresource, validate=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
return self.get_bucket().get_subresource(subresource, self.object_name)
def get_all_buckets(self, headers=NOT_IMPL):
return self.connect().get_all_buckets()
def get_all_keys(self, validate=NOT_IMPL, headers=NOT_IMPL):
return self.get_bucket().get_all_keys(self)
def get_bucket(self, validate=NOT_IMPL, headers=NOT_IMPL):
return self.connect().get_bucket(self.bucket_name)
def get_key(self, validate=NOT_IMPL, headers=NOT_IMPL,
version_id=NOT_IMPL):
return self.get_bucket().get_key(self.object_name)
def is_file_uri(self):
return False
def is_cloud_uri(self):
return True
def names_container(self):
return not self.object_name
def names_singleton(self):
return self.object_name
def new_key(self, validate=NOT_IMPL, headers=NOT_IMPL):
bucket = self.get_bucket()
return bucket.new_key(self.object_name)
def set_acl(self, acl_or_str, key_name='', validate=NOT_IMPL,
headers=NOT_IMPL, version_id=NOT_IMPL):
self.get_bucket().set_acl(acl_or_str, key_name)
def set_def_acl(self, acl_or_str, key_name=NOT_IMPL, validate=NOT_IMPL,
headers=NOT_IMPL, version_id=NOT_IMPL):
self.get_bucket().set_def_acl(acl_or_str)
def set_subresource(self, subresource, value, validate=NOT_IMPL,
headers=NOT_IMPL, version_id=NOT_IMPL):
self.get_bucket().set_subresource(subresource, value, self.object_name)
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