def gettmpdir(prefix='tmp/', suffix='', bucket='bodylabs-temp', uuid_generator=None): # pylint: disable=redefined-outer-name
'''
Make a directory on S3 with a known unique name. The prefix for the directory will be
``s3://<bucket>/<prefix><UUID><suffix>/``
Note that there _is_ a race condition in this code; if two clients happen to be trying to create a tmpdir and
somehow come up with the same uuid exactly simultaniously, they could both get the same dir. But in practice this
is sufficiently one in a billion that we'll not worry about it for now.
'''
from boto.s3.key import Key
from baiji.connection import S3Connection
if uuid_generator is None:
from uuid import uuid4 as uuid_generator # pragma: no cover
#s3.ls and s3.path.parse generated one with leading slash so remove it in case
prefix = prefix.lstrip('/')
b = S3Connection()._bucket(bucket) # pylint: disable=protected-access
done = False
while not done:
tmppath = "%s%s%s" % (prefix, uuid_generator(), suffix)
existin_files_at_tmppath = [x for x in b.list(prefix=tmppath)]
if not existin_files_at_tmppath:
k = Key(b)
k.key = "%s/.tempdir" % (tmppath)
k.set_contents_from_string('')
done = True
return "s3://%s/%s/" % (bucket, tmppath)
def __init__(self,
key,
mode='r',
connection=None,
encrypt=True,
version_id=None):
from baiji.connection import S3Connection
self.encrypt = encrypt
self.key = key
if path.islocal(key):
self.should_upload_on_close = False
self.mode = FileMode(mode, allowed_modes='arwxb+t')
from six.moves import builtins
local_path = path.parse(key).path
if self.mode.is_output and not os.path.exists(
os.path.dirname(local_path)):
from baiji.util.shutillib import mkdir_p
mkdir_p(os.path.dirname(local_path))
try:
# Use os.open to catch exclusive access to the file, but use open to get a nice, useful file object
self.fd = os.open(local_path, self.mode.flags)
self.f = builtins.open(local_path,
self.mode.mode.replace('x', 'w'))
os.close(self.fd)
except OSError as e:
import errno
if e.errno is errno.EEXIST:
raise KeyExists("Local file exists: %s" % local_path)
elif e.errno is errno.ENOENT:
raise KeyNotFound("Local file does not exist: %s" %
local_path)
else:
raise IOError(e.errno, "%s: %s" % (e.strerror, e.filename))
else:
if connection is None:
connection = S3Connection()
self.connection = connection
self.mode = FileMode(mode, allowed_modes='rwxbt')
self.should_upload_on_close = self.mode.is_output
if self.mode.creating_exclusively:
if self.connection.exists(self.key):
raise KeyExists("Key exists in bucket: %s" % self.key)
else:
self.connection.touch(self.key, encrypt=self.encrypt)
# Use w+ so we can read back the contents in upload()
new_mode = ('w+' + (self.mode.binary and 'b' or '') +
(self.mode.text and 't' or ''))
from baiji.util import tempfile
self.f = tempfile.NamedTemporaryFile(
mode=new_mode,
suffix=os.path.splitext(path.parse(self.key).path)[1])
self.name = self.f.name
self.remotename = key # Used by some serialization code to find files which sit along side the file in question, like textures which sit next to a mesh file
if self.mode.reading:
self.connection.cp(self.key,
self.name,
force=True,
version_id=version_id)
def __init__(self, kwargs_for_cp):
from baiji.connection import S3Connection
self.connection = S3Connection(cache_buckets=True)
self.kwargs_for_cp = kwargs_for_cp
self.verbose = self.kwargs_for_cp.get('progress', False)
if 'progress' in self.kwargs_for_cp:
self.kwargs_for_cp['progress'] = False
super(MultifileCopyWorker, self).__init__()
def isfile(key):
'''
Return true if key is file; local or s3.
'''
from baiji.connection import S3Connection
from baiji.exceptions import InvalidSchemeException
k = parse(key)
if islocal(key): #This really only ensures that scheme == 'file'
return os.path.isfile(k.path)
if isremote(key): # scheme == 'S3'
# exists currently only works for files on s3 because
# directories don't exist on s3, only files.
return S3Connection().exists(key)
else:
raise InvalidSchemeException("URI Scheme {} is not implemented".format(k.scheme))
def isdir(key):
'''
Return true if key is directory-ish. That is, it ends with a path
separator, or is a local directory that actually exists.
On S3 a "directory" is considered to exist if one or more files exist
that have the "directory" (ending with sep) as a prefix.
'''
from baiji.connection import S3Connection
from baiji.exceptions import InvalidSchemeException
k = parse(key)
if islocal(key): #This really only ensures that scheme == 'file'
return os.path.isdir(k.path)
if isremote(key): # scheme == 'S3'
if not k.path.endswith(sep):
k = parse(key + sep)
try:
next(S3Connection().ls(k.geturl()))
return True
except StopIteration:
return False
else:
raise InvalidSchemeException("URI Scheme {} is not implemented".format(k.scheme))
def etag_matches(*args, **kwargs):
return S3Connection().etag_matches(*args, **kwargs)
def etag(*args, **kwargs):
return S3Connection().etag(*args, **kwargs)
def size(*args, **kwargs):
return S3Connection().size(*args, **kwargs)
def list_buckets(*args, **kwargs):
return S3Connection().list_buckets(*args, **kwargs)
def put_string(*args, **kwargs):
return S3Connection().put_string(*args, **kwargs)
def touch(*args, **kwargs):
return S3Connection().touch(*args, **kwargs)
def ls(*args, **kwargs):
return S3Connection().ls(*args, **kwargs)
def rm_r(*args, **kwargs):
return S3Connection().rm_r(*args, **kwargs)
def cp_many(*args, **kwargs):
return S3Connection().cp_many(*args, **kwargs)
def disable_versioning(*args, **kwargs):
return S3Connection().disable_versioning(*args, **kwargs)
def enable_versioning(*args, **kwargs):
return S3Connection().enable_versioning(*args, **kwargs)
def create_bucket(*args, **kwargs):
return S3Connection().create_bucket(*args, **kwargs)
def bucket_info(*args, **kwargs):
return S3Connection().bucket_info(*args, **kwargs)
def encrypt_at_rest(*args, **kwargs):
return S3Connection().encrypt_at_rest(*args, **kwargs)
def mv(*args, **kwargs):
return S3Connection().mv(*args, **kwargs)
def glob(*args, **kwargs):
return S3Connection().glob(*args, **kwargs)
def sync(*args, **kwargs):
return S3Connection().sync(*args, **kwargs)
def get_url(*args, **kwargs):
return S3Connection().get_url(*args, **kwargs)
def restore(*args, **kwargs):
return S3Connection().restore(*args, **kwargs)
def exists(*args, **kwargs):
return S3Connection().exists(*args, **kwargs)
def info(*args, **kwargs):
return S3Connection().info(*args, **kwargs)
def get_string(*args, **kwargs):
return S3Connection().get_string(*args, **kwargs)
