Source code for swh.objstorage.backends.seaweedfs.objstorage

# Copyright (C) 2019-2023  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information

from datetime import timedelta
import io
from itertools import islice
import logging
from typing import Iterator, Optional
from urllib.parse import urlparse

from typing_extensions import Literal

from swh.model import hashutil
from swh.objstorage.backends.pathslicing import PathSlicer
from swh.objstorage.exc import Error, ObjNotFoundError
from swh.objstorage.interface import CompositeObjId, ObjId
from swh.objstorage.objstorage import (

from .http import HttpFiler

LOGGER = logging.getLogger(__name__)

[docs]class SeaweedFilerObjStorage(ObjStorage): """ObjStorage with seaweedfs abilities, using the Filer API. """ PRIMARY_HASH: Literal["sha1"] = "sha1" def __init__(self, url, compression=None, slicing="", pool_maxsize=100, **kwargs): super().__init__(**kwargs) = HttpFiler(url, pool_maxsize=pool_maxsize) self.root_path = urlparse(url).path if not self.root_path.endswith("/"): self.root_path += "/" self.slicer = PathSlicer(self.root_path, slicing) self.compression = compression
[docs] def check_config(self, *, check_write): """Check the configuration for this object storage""" # FIXME: hopefully this blew up during instantiation return True
def __contains__(self, obj_id: ObjId) -> bool: return def __iter__(self) -> Iterator[CompositeObjId]: """Iterate over the objects present in the storage Warning: Iteration over the contents of a cloud-based object storage may have bad efficiency: due to the very high amount of objects in it and the fact that it is remote, get all the contents of the current object storage may result in a lot of network requests. You almost certainly don't want to use this method in production. """ for obj_id in self.list_content(limit=None): assert obj_id yield obj_id def __len__(self): """Compute the number of objects in the current object storage. Warning: this currently uses `__iter__`, its warning about bad performance applies. Returns: number of objects contained in the storage. """ return sum(1 for i in self)
[docs] def add(self, content: bytes, obj_id: ObjId, check_presence: bool = True) -> None: if check_presence and obj_id in self: return def compressor(data): comp = compressors[self.compression]() yield comp.compress(data) yield comp.flush() assert isinstance( content, bytes ), "list of content chunks is not supported anymore""".join(compressor(content))), self._path(obj_id))
[docs] def restore(self, content: bytes, obj_id: ObjId) -> None: return self.add(content, obj_id, check_presence=False)
[docs] def get(self, obj_id: ObjId) -> bytes: try: obj = except Exception as exc:"Failed to get object %s: %r", self._path(obj_id), exc) raise ObjNotFoundError(obj_id) d = decompressors[self.compression]() ret = d.decompress(obj) if d.unused_data: hex_obj_id = objid_to_default_hex(obj_id) raise Error("Corrupt object %s: trailing data found" % hex_obj_id) return ret
[docs] def download_url( self, obj_id: ObjId, content_disposition: Optional[str] = None, expiry: Optional[timedelta] = None, ) -> Optional[str]: path = self._path(obj_id) if not raise ObjNotFoundError(obj_id) return
[docs] def check(self, obj_id: ObjId) -> None: # Check the content integrity obj_content = self.get(obj_id) content_obj_id = compute_hash(obj_content) if isinstance(obj_id, dict): obj_id = obj_id[self.PRIMARY_HASH] if content_obj_id != obj_id: raise Error(obj_id)
[docs] def delete(self, obj_id: ObjId): super().delete(obj_id) # Check delete permission if obj_id not in self: raise ObjNotFoundError(obj_id) return True
[docs] def list_content( self, last_obj_id: Optional[ObjId] = None, limit: Optional[int] = DEFAULT_LIMIT, ) -> Iterator[CompositeObjId]: if last_obj_id: objpath = self._path(last_obj_id) startdir, lastfilename = objpath.rsplit("/", 1) else: startdir = self.root_path lastfilename = None for fname in islice(, last_file_name=lastfilename), limit ): bytehex = fname.rsplit("/", 1)[-1] yield {self.PRIMARY_HASH: hashutil.hash_to_bytes(bytehex)}
# internal methods def _path(self, obj_id: ObjId): """Compute the backend path for the given obj id Given an object is, return the path part of the url to query the backend seaweedfs filer service with, according the configured path slicing. """ return self.slicer.get_path(objid_to_default_hex(obj_id))