зеркало из https://github.com/Azure/blobxfer.git
Support stdin
This commit is contained in:
Fred Park
Родитель
e8ab378064
Коммит
53d0beb8d9
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@ -22,6 +22,7 @@
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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import sys
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from .version import __version__ # noqa
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# monkeypatch User-Agent string
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@ -31,3 +32,13 @@ azure.storage._constants.USER_AGENT_STRING = 'blobxfer/{} {}'.format(
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# monkeypatch SOCKET_TIMEOUT value in Azure Storage SDK
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azure.storage._constants.SOCKET_TIMEOUT = (5, 300)
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# set stdin source
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if sys.version_info >= (3, 0):
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STDIN = sys.stdin.buffer
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else:
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# set stdin to binary mode on Windows
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if sys.platform == 'win32':
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import os, msvcrt # noqa
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msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
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STDIN = sys.stdin
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@ -53,7 +53,7 @@ import blobxfer.util
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logger = logging.getLogger(__name__)
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# global defines
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_MAX_BLOCK_BLOB_ONESHOT_BYTES = 268435456
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_MAX_BLOCK_BLOB_CHUNKSIZE_BYTES = 268435456
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_MAX_BLOCK_BLOB_CHUNKSIZE_BYTES = 104857600
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_MAX_NONBLOCK_BLOB_CHUNKSIZE_BYTES = 4194304
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_MAX_NUM_CHUNKS = 50000
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_DEFAULT_AUTO_CHUNKSIZE_BYTES = 16777216
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@ -93,17 +93,29 @@ class VectoredIoDistributionMode(enum.Enum):
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class LocalPath(object):
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"""Local Path"""
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def __init__(self, parent_path, relative_path, view=None):
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# type: (LocalPath, pathlib.Path, pathlib.Path, LocalPathView) -> None
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def __init__(self, parent_path, relative_path, use_stdin=False, view=None):
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# type: (LocalPath, pathlib.Path, pathlib.Path, bool,
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# LocalPathView) -> None
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"""Ctor for LocalPath
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:param LocalPath self: this
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:param pathlib.Path parent_path: parent path
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:param pathlib.Path relative_path: relative path
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:param bool use_stdin: use stdin
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:param LocalPathView view: local path view
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"""
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self.parent_path = parent_path
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self.relative_path = relative_path
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self.use_stdin = use_stdin
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# populate properties
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if self.use_stdin:
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# create dummy stat object
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self._stat = type('stat', (object,), {})
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self._stat.st_size = 0
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self._stat.st_mtime = 0
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self._stat.st_mode = 0
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self._stat.st_uid = 0
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self._stat.st_gid = 0
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else:
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self._stat = self.absolute_path.stat()
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if view is None:
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self.view = LocalPathView(
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@ -194,13 +206,25 @@ class LocalSourcePath(blobxfer.models._BaseSourcePaths):
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def can_rename(self):
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# type: (LocalSourcePaths) -> bool
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"""Check if ource can be renamed
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"""Check if source can be renamed
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:param LocalSourcePath self: this
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:rtype: bool
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:return: if rename possible
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"""
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return len(self._paths) == 1 and self._paths[0].is_file()
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@staticmethod
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def is_stdin(path):
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# type: (str) -> bool
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"""Check if path is stdin
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:param str path: path to check
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:rtype: bool
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:return: if path is stdin
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"""
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if path == '-' or path == '/dev/stdin':
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return True
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return False
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def files(self):
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# type: (LocalSourcePaths) -> LocalPath
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"""Generator for files in paths
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@ -210,6 +234,15 @@ class LocalSourcePath(blobxfer.models._BaseSourcePaths):
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"""
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for _path in self._paths:
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_ppath = os.path.expandvars(os.path.expanduser(str(_path)))
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# check of path is stdin
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if blobxfer.models.upload.LocalSourcePath.is_stdin(_ppath):
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yield LocalPath(
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parent_path=pathlib.Path(),
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relative_path=pathlib.Path('stdin'),
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use_stdin=True,
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)
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continue
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# resolve path
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_expath = pathlib.Path(_ppath).resolve()
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# check if path is a single file
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tmp = pathlib.Path(_ppath)
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@ -217,7 +250,8 @@ class LocalSourcePath(blobxfer.models._BaseSourcePaths):
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if self._inclusion_check(tmp.name):
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yield LocalPath(
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parent_path=tmp.parent,
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relative_path=pathlib.Path(tmp.name)
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relative_path=pathlib.Path(tmp.name),
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use_stdin=False,
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)
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continue
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del tmp
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@ -225,7 +259,11 @@ class LocalSourcePath(blobxfer.models._BaseSourcePaths):
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_rpath = pathlib.Path(entry.path).relative_to(_ppath)
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if not self._inclusion_check(_rpath):
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continue
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yield LocalPath(parent_path=_expath, relative_path=_rpath)
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yield LocalPath(
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parent_path=_expath,
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relative_path=_rpath,
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use_stdin=False,
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)
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class Specification(object):
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@ -523,6 +561,11 @@ class Descriptor(object):
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logger.debug(
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'auto-selected chunk size of {} for {}'.format(
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chunk_size, self.local_path.absolute_path))
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if self.local_path.use_stdin:
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self._chunk_size = max(
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(chunk_size, _MAX_NONBLOCK_BLOB_CHUNKSIZE_BYTES)
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)
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else:
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self._chunk_size = min((chunk_size, self._ase.size))
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# ensure chunk sizes are compatible with mode
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if self._ase.mode == blobxfer.models.azure.StorageModes.Append:
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@ -533,7 +576,8 @@ class Descriptor(object):
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'from {}').format(
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self._chunk_size, self.local_path.absolute_path))
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elif self._ase.mode == blobxfer.models.azure.StorageModes.Block:
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if self._ase.size <= options.one_shot_bytes:
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if (not self.local_path.use_stdin and
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self._ase.size <= options.one_shot_bytes):
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self._chunk_size = min(
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(self._ase.size, options.one_shot_bytes)
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)
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@ -569,6 +613,8 @@ class Descriptor(object):
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chunks = int(math.ceil(self._ase.size / chunk_size))
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except ZeroDivisionError:
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chunks = 1
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if self.local_path.use_stdin and chunks == 0:
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chunks = 1
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if chunks > 50000:
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max_vector = False
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if self._ase.mode == blobxfer.models.azure.StorageModes.Block:
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@ -645,15 +691,17 @@ class Descriptor(object):
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), resume_bytes
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def read_data(self, offsets):
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# type: (Descriptor, Offsets) -> bytes
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# type: (Descriptor, Offsets) -> Tuple[bytes, Offsets]
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"""Read data from file
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:param Descriptor self: this
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:param Offsets offsets: offsets
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:rtype: bytes
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:return: file data
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:rtype: tuple
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:return: (file data bytes, new Offsets if stdin)
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"""
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newoffset = None
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if not self.local_path.use_stdin:
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if offsets.num_bytes == 0:
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return None
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return None, None
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# compute start from view
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start = self.local_path.view.fd_start + offsets.range_start
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# encrypted offsets will read past the end of the file due
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@ -661,10 +709,31 @@ class Descriptor(object):
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with self.local_path.absolute_path.open('rb') as fd:
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fd.seek(start, 0)
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data = fd.read(offsets.num_bytes)
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if self.must_compute_md5:
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else:
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data = blobxfer.STDIN.read(self._chunk_size)
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if not data:
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with self._meta_lock:
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self._total_chunks -= 1
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self._chunk_num -= 1
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self._outstanding_ops -= 1
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else:
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num_bytes = len(data)
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with self._meta_lock:
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newoffset = Offsets(
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chunk_num=self._chunk_num - 1,
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num_bytes=num_bytes,
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range_start=self._offset,
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range_end=self._offset + num_bytes - 1,
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pad=False,
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)
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self._total_chunks += 1
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self._outstanding_ops += 1
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self._offset += num_bytes
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self._ase.size += num_bytes
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if self.must_compute_md5 and data:
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with self._hasher_lock:
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self.md5.update(data)
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return data
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return data, newoffset
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def generate_metadata(self):
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# type: (Descriptor) -> dict
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@ -690,7 +759,7 @@ class Descriptor(object):
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encmeta = self._ase.encryption_metadata.convert_to_json_with_mac(
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md5digest, hmacdigest)
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# generate file attribute metadata
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if self._store_file_attr:
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if self._store_file_attr and not self.local_path.use_stdin:
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merged = blobxfer.models.metadata.generate_fileattr_metadata(
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self.local_path, genmeta)
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if merged is not None:
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@ -48,9 +48,9 @@ logger = logging.getLogger(__name__)
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def update_progress_bar(
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go, optext, start, total_files, files_sofar, total_bytes,
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bytes_sofar):
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bytes_sofar, stdin_upload=False):
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# type: (blobxfer.models.options.General, str, datetime.datetime, int,
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# int, int, int) -> None
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# int, int, int, bool) -> None
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"""Update the progress bar
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:param blobxfer.models.options.General go: general options
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:param str optext: operation prefix text
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@ -59,6 +59,7 @@ def update_progress_bar(
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:param int files_sofar: files transfered so far
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:param int total_bytes: total number of bytes
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:param int bytes_sofar: bytes transferred so far
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:param bool stdin_upload: stdin upload
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"""
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if (not go.progress_bar or blobxfer.util.is_none_or_empty(go.log_file) or
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start is None):
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@ -80,6 +81,13 @@ def update_progress_bar(
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fprog = 'n/a'
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else:
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fprog = '{}/{}'.format(files_sofar, total_files)
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if stdin_upload:
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sys.stdout.write(
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('\r{0} progress: [{1:30s}] n/a % {2:12.3f} MiB/sec, '
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'{3} {4}').format(
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optext, '>' * int(total_bytes % 30), rate, fprog, rtext)
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)
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else:
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sys.stdout.write(
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('\r{0} progress: [{1:30s}] {2:.2f}% {3:12.3f} MiB/sec, '
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'{4} {5}').format(
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@ -191,10 +191,11 @@ class Uploader(object):
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"""
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return '{}.bxslice-{}'.format(name, slice)
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def _update_progress_bar(self):
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# type: (Uploader) -> None
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def _update_progress_bar(self, stdin=False):
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# type: (Uploader, bool) -> None
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"""Update progress bar
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:param Uploader self: this
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:param bool stdin: stdin upload
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"""
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if not self._all_files_processed:
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return
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@ -206,6 +207,7 @@ class Uploader(object):
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self._upload_sofar,
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self._upload_bytes_total,
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self._upload_bytes_sofar,
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stdin_upload=stdin,
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)
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def _pre_md5_skip_on_check(self, src, rfile):
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@ -370,7 +372,9 @@ class Uploader(object):
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self._put_data(ud, ase, offsets, data)
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# accounting
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with self._transfer_lock:
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if offsets.chunk_num == 0:
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if ud.local_path.use_stdin:
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self._upload_bytes_total += offsets.num_bytes
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elif offsets.chunk_num == 0:
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self._upload_bytes_total += ase.size
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self._upload_bytes_sofar += offsets.num_bytes
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self._transfer_set.remove(
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@ -378,7 +382,7 @@ class Uploader(object):
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ud.local_path, ase, offsets))
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ud.complete_offset_upload()
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# update progress bar
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self._update_progress_bar()
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self._update_progress_bar(stdin=ud.local_path.use_stdin)
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def _put_data(self, ud, ase, offsets, data):
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# type: (Uploader, blobxfer.models.upload.Descriptor,
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@ -462,7 +466,15 @@ class Uploader(object):
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:param blobxfer.models.azure.StorageEntity ase: Storage entity
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:param blobxfer.models.upload.Offsets offsets: offsets
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"""
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if ase.mode == blobxfer.models.azure.StorageModes.Block:
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if ase.mode == blobxfer.models.azure.StorageModes.Append:
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# create container if necessary
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blobxfer.operations.azure.blob.create_container(
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ase, self._containers_created,
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timeout=self._general_options.timeout_sec)
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# create remote blob
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blobxfer.operations.azure.blob.append.create_blob(
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ase, timeout=self._general_options.timeout_sec)
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elif ase.mode == blobxfer.models.azure.StorageModes.Block:
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# create container if necessary
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blobxfer.operations.azure.blob.create_container(
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ase, self._containers_created,
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@ -496,7 +508,7 @@ class Uploader(object):
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:param Uploader self: this
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:param blobxfer.models.upload.Descriptor: upload descriptor
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"""
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# get download offsets
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# get upload offsets
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offsets, resume_bytes = ud.next_offsets()
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# add resume bytes to counter
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if resume_bytes is not None:
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@ -531,7 +543,7 @@ class Uploader(object):
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# encrypt data
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if self._crypto_offload is None:
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# read data from file and encrypt
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data = ud.read_data(offsets)
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data, _ = ud.read_data(offsets)
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encdata = blobxfer.operations.crypto.aes_cbc_encrypt_data(
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ud.entity.encryption_metadata.symmetric_key,
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ud.current_iv, data, offsets.pad)
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@ -552,9 +564,15 @@ class Uploader(object):
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# retrieved from crypto queue
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# return_early = True
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else:
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data = ud.read_data(offsets)
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data, newoffset = ud.read_data(offsets)
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# set new offset if stdin
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if newoffset is not None:
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offsets = newoffset
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# re-enqueue for other threads to upload
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self._upload_queue.put(ud)
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# no data can be returned on stdin uploads
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if not data:
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return
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# add data to transfer queue
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with self._transfer_lock:
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self._transfer_set.add(
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@ -713,7 +731,7 @@ class Uploader(object):
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"""
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lpath = local_path.absolute_path
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# check if local file still exists
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if not lpath.exists():
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if not local_path.use_stdin and not lpath.exists():
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return UploadAction.Skip
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# if remote file doesn't exist, upload
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if rfile is None:
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@ -849,7 +867,8 @@ class Uploader(object):
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:return: action, LocalPath, ase
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"""
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if (self._spec.options.vectored_io.distribution_mode ==
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blobxfer.models.upload.VectoredIoDistributionMode.Stripe):
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blobxfer.models.upload.VectoredIoDistributionMode.Stripe and
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not local_path.use_stdin):
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# compute total number of slices
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slices = int(math.ceil(
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local_path.total_size /
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@ -897,6 +916,7 @@ class Uploader(object):
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lp_slice = blobxfer.models.upload.LocalPath(
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parent_path=local_path.parent_path,
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relative_path=local_path.relative_path,
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use_stdin=False,
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view=blobxfer.models.upload.LocalPathView(
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fd_start=start,
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fd_end=end,
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