307 lines
8.4 KiB
Python
307 lines
8.4 KiB
Python
|
import errno
|
||
|
|
import io
|
||
|
|
import os
|
||
|
|
import secrets
|
||
|
|
import shutil
|
||
|
|
from contextlib import suppress
|
||
|
|
from functools import cached_property, wraps
|
||
|
|
from urllib.parse import parse_qs
|
||
|
|
|
||
|
|
from fsspec.spec import AbstractFileSystem
|
||
|
|
from fsspec.utils import (
|
||
|
|
get_package_version_without_import,
|
||
|
|
infer_storage_options,
|
||
|
|
mirror_from,
|
||
|
|
tokenize,
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def wrap_exceptions(func):
|
||
|
|
@wraps(func)
|
||
|
|
def wrapper(*args, **kwargs):
|
||
|
|
try:
|
||
|
|
return func(*args, **kwargs)
|
||
|
|
except OSError as exception:
|
||
|
|
if not exception.args:
|
||
|
|
raise
|
||
|
|
|
||
|
|
message, *args = exception.args
|
||
|
|
if isinstance(message, str) and "does not exist" in message:
|
||
|
|
raise FileNotFoundError(errno.ENOENT, message) from exception
|
||
|
|
else:
|
||
|
|
raise
|
||
|
|
|
||
|
|
return wrapper
|
||
|
|
|
||
|
|
|
||
|
|
PYARROW_VERSION = None
|
||
|
|
|
||
|
|
|
||
|
|
class ArrowFSWrapper(AbstractFileSystem):
|
||
|
|
"""FSSpec-compatible wrapper of pyarrow.fs.FileSystem.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
fs : pyarrow.fs.FileSystem
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
root_marker = "/"
|
||
|
|
|
||
|
|
def __init__(self, fs, **kwargs):
|
||
|
|
global PYARROW_VERSION
|
||
|
|
PYARROW_VERSION = get_package_version_without_import("pyarrow")
|
||
|
|
self.fs = fs
|
||
|
|
super().__init__(**kwargs)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def protocol(self):
|
||
|
|
return self.fs.type_name
|
||
|
|
|
||
|
|
@cached_property
|
||
|
|
def fsid(self):
|
||
|
|
return "hdfs_" + tokenize(self.fs.host, self.fs.port)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _strip_protocol(cls, path):
|
||
|
|
ops = infer_storage_options(path)
|
||
|
|
path = ops["path"]
|
||
|
|
if path.startswith("//"):
|
||
|
|
# special case for "hdfs://path" (without the triple slash)
|
||
|
|
path = path[1:]
|
||
|
|
return path
|
||
|
|
|
||
|
|
def ls(self, path, detail=False, **kwargs):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
from pyarrow.fs import FileSelector
|
||
|
|
|
||
|
|
entries = [
|
||
|
|
self._make_entry(entry)
|
||
|
|
for entry in self.fs.get_file_info(FileSelector(path))
|
||
|
|
]
|
||
|
|
if detail:
|
||
|
|
return entries
|
||
|
|
else:
|
||
|
|
return [entry["name"] for entry in entries]
|
||
|
|
|
||
|
|
def info(self, path, **kwargs):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
[info] = self.fs.get_file_info([path])
|
||
|
|
return self._make_entry(info)
|
||
|
|
|
||
|
|
def exists(self, path):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
try:
|
||
|
|
self.info(path)
|
||
|
|
except FileNotFoundError:
|
||
|
|
return False
|
||
|
|
else:
|
||
|
|
return True
|
||
|
|
|
||
|
|
def _make_entry(self, info):
|
||
|
|
from pyarrow.fs import FileType
|
||
|
|
|
||
|
|
if info.type is FileType.Directory:
|
||
|
|
kind = "directory"
|
||
|
|
elif info.type is FileType.File:
|
||
|
|
kind = "file"
|
||
|
|
elif info.type is FileType.NotFound:
|
||
|
|
raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), info.path)
|
||
|
|
else:
|
||
|
|
kind = "other"
|
||
|
|
|
||
|
|
return {
|
||
|
|
"name": info.path,
|
||
|
|
"size": info.size,
|
||
|
|
"type": kind,
|
||
|
|
"mtime": info.mtime,
|
||
|
|
}
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def cp_file(self, path1, path2, **kwargs):
|
||
|
|
path1 = self._strip_protocol(path1).rstrip("/")
|
||
|
|
path2 = self._strip_protocol(path2).rstrip("/")
|
||
|
|
|
||
|
|
with self._open(path1, "rb") as lstream:
|
||
|
|
tmp_fname = f"{path2}.tmp.{secrets.token_hex(6)}"
|
||
|
|
try:
|
||
|
|
with self.open(tmp_fname, "wb") as rstream:
|
||
|
|
shutil.copyfileobj(lstream, rstream)
|
||
|
|
self.fs.move(tmp_fname, path2)
|
||
|
|
except BaseException: # noqa
|
||
|
|
with suppress(FileNotFoundError):
|
||
|
|
self.fs.delete_file(tmp_fname)
|
||
|
|
raise
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def mv(self, path1, path2, **kwargs):
|
||
|
|
path1 = self._strip_protocol(path1).rstrip("/")
|
||
|
|
path2 = self._strip_protocol(path2).rstrip("/")
|
||
|
|
self.fs.move(path1, path2)
|
||
|
|
|
||
|
|
mv_file = mv
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def rm_file(self, path):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
self.fs.delete_file(path)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def rm(self, path, recursive=False, maxdepth=None):
|
||
|
|
path = self._strip_protocol(path).rstrip("/")
|
||
|
|
if self.isdir(path):
|
||
|
|
if recursive:
|
||
|
|
self.fs.delete_dir(path)
|
||
|
|
else:
|
||
|
|
raise ValueError("Can't delete directories without recursive=False")
|
||
|
|
else:
|
||
|
|
self.fs.delete_file(path)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def _open(self, path, mode="rb", block_size=None, seekable=True, **kwargs):
|
||
|
|
if mode == "rb":
|
||
|
|
if seekable:
|
||
|
|
method = self.fs.open_input_file
|
||
|
|
else:
|
||
|
|
method = self.fs.open_input_stream
|
||
|
|
elif mode == "wb":
|
||
|
|
method = self.fs.open_output_stream
|
||
|
|
elif mode == "ab":
|
||
|
|
method = self.fs.open_append_stream
|
||
|
|
else:
|
||
|
|
raise ValueError(f"unsupported mode for Arrow filesystem: {mode!r}")
|
||
|
|
|
||
|
|
_kwargs = {}
|
||
|
|
if mode != "rb" or not seekable:
|
||
|
|
if int(PYARROW_VERSION.split(".")[0]) >= 4:
|
||
|
|
# disable compression auto-detection
|
||
|
|
_kwargs["compression"] = None
|
||
|
|
stream = method(path, **_kwargs)
|
||
|
|
|
||
|
|
return ArrowFile(self, stream, path, mode, block_size, **kwargs)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def mkdir(self, path, create_parents=True, **kwargs):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
if create_parents:
|
||
|
|
self.makedirs(path, exist_ok=True)
|
||
|
|
else:
|
||
|
|
self.fs.create_dir(path, recursive=False)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def makedirs(self, path, exist_ok=False):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
self.fs.create_dir(path, recursive=True)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def rmdir(self, path):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
self.fs.delete_dir(path)
|
||
|
|
|
||
|
|
@wrap_exceptions
|
||
|
|
def modified(self, path):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
return self.fs.get_file_info(path).mtime
|
||
|
|
|
||
|
|
def cat_file(self, path, start=None, end=None, **kwargs):
|
||
|
|
kwargs["seekable"] = start not in [None, 0]
|
||
|
|
return super().cat_file(path, start=None, end=None, **kwargs)
|
||
|
|
|
||
|
|
def get_file(self, rpath, lpath, **kwargs):
|
||
|
|
kwargs["seekable"] = False
|
||
|
|
super().get_file(rpath, lpath, **kwargs)
|
||
|
|
|
||
|
|
|
||
|
|
@mirror_from(
|
||
|
|
"stream",
|
||
|
|
[
|
||
|
|
"read",
|
||
|
|
"seek",
|
||
|
|
"tell",
|
||
|
|
"write",
|
||
|
|
"readable",
|
||
|
|
"writable",
|
||
|
|
"close",
|
||
|
|
"size",
|
||
|
|
"seekable",
|
||
|
|
],
|
||
|
|
)
|
||
|
|
class ArrowFile(io.IOBase):
|
||
|
|
def __init__(self, fs, stream, path, mode, block_size=None, **kwargs):
|
||
|
|
self.path = path
|
||
|
|
self.mode = mode
|
||
|
|
|
||
|
|
self.fs = fs
|
||
|
|
self.stream = stream
|
||
|
|
|
||
|
|
self.blocksize = self.block_size = block_size
|
||
|
|
self.kwargs = kwargs
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, *args):
|
||
|
|
return self.close()
|
||
|
|
|
||
|
|
|
||
|
|
class HadoopFileSystem(ArrowFSWrapper):
|
||
|
|
"""A wrapper on top of the pyarrow.fs.HadoopFileSystem
|
||
|
|
to connect it's interface with fsspec"""
|
||
|
|
|
||
|
|
protocol = "hdfs"
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self,
|
||
|
|
host="default",
|
||
|
|
port=0,
|
||
|
|
user=None,
|
||
|
|
kerb_ticket=None,
|
||
|
|
replication=3,
|
||
|
|
extra_conf=None,
|
||
|
|
**kwargs,
|
||
|
|
):
|
||
|
|
"""
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
host: str
|
||
|
|
Hostname, IP or "default" to try to read from Hadoop config
|
||
|
|
port: int
|
||
|
|
Port to connect on, or default from Hadoop config if 0
|
||
|
|
user: str or None
|
||
|
|
If given, connect as this username
|
||
|
|
kerb_ticket: str or None
|
||
|
|
If given, use this ticket for authentication
|
||
|
|
replication: int
|
||
|
|
set replication factor of file for write operations. default value is 3.
|
||
|
|
extra_conf: None or dict
|
||
|
|
Passed on to HadoopFileSystem
|
||
|
|
"""
|
||
|
|
from pyarrow.fs import HadoopFileSystem
|
||
|
|
|
||
|
|
fs = HadoopFileSystem(
|
||
|
|
host=host,
|
||
|
|
port=port,
|
||
|
|
user=user,
|
||
|
|
kerb_ticket=kerb_ticket,
|
||
|
|
replication=replication,
|
||
|
|
extra_conf=extra_conf,
|
||
|
|
)
|
||
|
|
super().__init__(fs=fs, **kwargs)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _get_kwargs_from_urls(path):
|
||
|
|
ops = infer_storage_options(path)
|
||
|
|
out = {}
|
||
|
|
if ops.get("host", None):
|
||
|
|
out["host"] = ops["host"]
|
||
|
|
if ops.get("username", None):
|
||
|
|
out["user"] = ops["username"]
|
||
|
|
if ops.get("port", None):
|
||
|
|
out["port"] = ops["port"]
|
||
|
|
if ops.get("url_query", None):
|
||
|
|
queries = parse_qs(ops["url_query"])
|
||
|
|
if queries.get("replication", None):
|
||
|
|
out["replication"] = int(queries["replication"][0])
|
||
|
|
return out
|