diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/fsspec/implementations/ftp.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/fsspec/implementations/ftp.py | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/fsspec/implementations/ftp.py b/.venv/lib/python3.12/site-packages/fsspec/implementations/ftp.py new file mode 100644 index 00000000..4186b6ce --- /dev/null +++ b/.venv/lib/python3.12/site-packages/fsspec/implementations/ftp.py @@ -0,0 +1,395 @@ +import os +import sys +import uuid +import warnings +from ftplib import FTP, FTP_TLS, Error, error_perm +from typing import Any + +from ..spec import AbstractBufferedFile, AbstractFileSystem +from ..utils import infer_storage_options, isfilelike + + +class FTPFileSystem(AbstractFileSystem): + """A filesystem over classic FTP""" + + root_marker = "/" + cachable = False + protocol = "ftp" + + def __init__( + self, + host, + port=21, + username=None, + password=None, + acct=None, + block_size=None, + tempdir=None, + timeout=30, + encoding="utf-8", + tls=False, + **kwargs, + ): + """ + You can use _get_kwargs_from_urls to get some kwargs from + a reasonable FTP url. + + Authentication will be anonymous if username/password are not + given. + + Parameters + ---------- + host: str + The remote server name/ip to connect to + port: int + Port to connect with + username: str or None + If authenticating, the user's identifier + password: str of None + User's password on the server, if using + acct: str or None + Some servers also need an "account" string for auth + block_size: int or None + If given, the read-ahead or write buffer size. + tempdir: str + Directory on remote to put temporary files when in a transaction + timeout: int + Timeout of the ftp connection in seconds + encoding: str + Encoding to use for directories and filenames in FTP connection + tls: bool + Use FTP-TLS, by default False + """ + super().__init__(**kwargs) + self.host = host + self.port = port + self.tempdir = tempdir or "/tmp" + self.cred = username or "", password or "", acct or "" + self.timeout = timeout + self.encoding = encoding + if block_size is not None: + self.blocksize = block_size + else: + self.blocksize = 2**16 + self.tls = tls + self._connect() + if self.tls: + self.ftp.prot_p() + + def _connect(self): + if self.tls: + ftp_cls = FTP_TLS + else: + ftp_cls = FTP + if sys.version_info >= (3, 9): + self.ftp = ftp_cls(timeout=self.timeout, encoding=self.encoding) + elif self.encoding: + warnings.warn("`encoding` not supported for python<3.9, ignoring") + self.ftp = ftp_cls(timeout=self.timeout) + else: + self.ftp = ftp_cls(timeout=self.timeout) + self.ftp.connect(self.host, self.port) + self.ftp.login(*self.cred) + + @classmethod + def _strip_protocol(cls, path): + return "/" + infer_storage_options(path)["path"].lstrip("/").rstrip("/") + + @staticmethod + def _get_kwargs_from_urls(urlpath): + out = infer_storage_options(urlpath) + out.pop("path", None) + out.pop("protocol", None) + return out + + def ls(self, path, detail=True, **kwargs): + path = self._strip_protocol(path) + out = [] + if path not in self.dircache: + try: + try: + out = [ + (fn, details) + for (fn, details) in self.ftp.mlsd(path) + if fn not in [".", ".."] + and details["type"] not in ["pdir", "cdir"] + ] + except error_perm: + out = _mlsd2(self.ftp, path) # Not platform independent + for fn, details in out: + details["name"] = "/".join( + ["" if path == "/" else path, fn.lstrip("/")] + ) + if details["type"] == "file": + details["size"] = int(details["size"]) + else: + details["size"] = 0 + if details["type"] == "dir": + details["type"] = "directory" + self.dircache[path] = out + except Error: + try: + info = self.info(path) + if info["type"] == "file": + out = [(path, info)] + except (Error, IndexError) as exc: + raise FileNotFoundError(path) from exc + files = self.dircache.get(path, out) + if not detail: + return sorted([fn for fn, details in files]) + return [details for fn, details in files] + + def info(self, path, **kwargs): + # implement with direct method + path = self._strip_protocol(path) + if path == "/": + # special case, since this dir has no real entry + return {"name": "/", "size": 0, "type": "directory"} + files = self.ls(self._parent(path).lstrip("/"), True) + try: + out = next(f for f in files if f["name"] == path) + except StopIteration as exc: + raise FileNotFoundError(path) from exc + return out + + def get_file(self, rpath, lpath, **kwargs): + if self.isdir(rpath): + if not os.path.exists(lpath): + os.mkdir(lpath) + return + if isfilelike(lpath): + outfile = lpath + else: + outfile = open(lpath, "wb") + + def cb(x): + outfile.write(x) + + self.ftp.retrbinary( + f"RETR {rpath}", + blocksize=self.blocksize, + callback=cb, + ) + if not isfilelike(lpath): + outfile.close() + + def cat_file(self, path, start=None, end=None, **kwargs): + if end is not None: + return super().cat_file(path, start, end, **kwargs) + out = [] + + def cb(x): + out.append(x) + + try: + self.ftp.retrbinary( + f"RETR {path}", + blocksize=self.blocksize, + rest=start, + callback=cb, + ) + except (Error, error_perm) as orig_exc: + raise FileNotFoundError(path) from orig_exc + return b"".join(out) + + def _open( + self, + path, + mode="rb", + block_size=None, + cache_options=None, + autocommit=True, + **kwargs, + ): + path = self._strip_protocol(path) + block_size = block_size or self.blocksize + return FTPFile( + self, + path, + mode=mode, + block_size=block_size, + tempdir=self.tempdir, + autocommit=autocommit, + cache_options=cache_options, + ) + + def _rm(self, path): + path = self._strip_protocol(path) + self.ftp.delete(path) + self.invalidate_cache(self._parent(path)) + + def rm(self, path, recursive=False, maxdepth=None): + paths = self.expand_path(path, recursive=recursive, maxdepth=maxdepth) + for p in reversed(paths): + if self.isfile(p): + self.rm_file(p) + else: + self.rmdir(p) + + def mkdir(self, path: str, create_parents: bool = True, **kwargs: Any) -> None: + path = self._strip_protocol(path) + parent = self._parent(path) + if parent != self.root_marker and not self.exists(parent) and create_parents: + self.mkdir(parent, create_parents=create_parents) + + self.ftp.mkd(path) + self.invalidate_cache(self._parent(path)) + + def makedirs(self, path: str, exist_ok: bool = False) -> None: + path = self._strip_protocol(path) + if self.exists(path): + # NB: "/" does not "exist" as it has no directory entry + if not exist_ok: + raise FileExistsError(f"{path} exists without `exist_ok`") + # exists_ok=True -> no-op + else: + self.mkdir(path, create_parents=True) + + def rmdir(self, path): + path = self._strip_protocol(path) + self.ftp.rmd(path) + self.invalidate_cache(self._parent(path)) + + def mv(self, path1, path2, **kwargs): + path1 = self._strip_protocol(path1) + path2 = self._strip_protocol(path2) + self.ftp.rename(path1, path2) + self.invalidate_cache(self._parent(path1)) + self.invalidate_cache(self._parent(path2)) + + def __del__(self): + self.ftp.close() + + def invalidate_cache(self, path=None): + if path is None: + self.dircache.clear() + else: + self.dircache.pop(path, None) + super().invalidate_cache(path) + + +class TransferDone(Exception): + """Internal exception to break out of transfer""" + + pass + + +class FTPFile(AbstractBufferedFile): + """Interact with a remote FTP file with read/write buffering""" + + def __init__( + self, + fs, + path, + mode="rb", + block_size="default", + autocommit=True, + cache_type="readahead", + cache_options=None, + **kwargs, + ): + super().__init__( + fs, + path, + mode=mode, + block_size=block_size, + autocommit=autocommit, + cache_type=cache_type, + cache_options=cache_options, + **kwargs, + ) + if not autocommit: + self.target = self.path + self.path = "/".join([kwargs["tempdir"], str(uuid.uuid4())]) + + def commit(self): + self.fs.mv(self.path, self.target) + + def discard(self): + self.fs.rm(self.path) + + def _fetch_range(self, start, end): + """Get bytes between given byte limits + + Implemented by raising an exception in the fetch callback when the + number of bytes received reaches the requested amount. + + Will fail if the server does not respect the REST command on + retrieve requests. + """ + out = [] + total = [0] + + def callback(x): + total[0] += len(x) + if total[0] > end - start: + out.append(x[: (end - start) - total[0]]) + if end < self.size: + raise TransferDone + else: + out.append(x) + + if total[0] == end - start and end < self.size: + raise TransferDone + + try: + self.fs.ftp.retrbinary( + f"RETR {self.path}", + blocksize=self.blocksize, + rest=start, + callback=callback, + ) + except TransferDone: + try: + # stop transfer, we got enough bytes for this block + self.fs.ftp.abort() + self.fs.ftp.getmultiline() + except Error: + self.fs._connect() + + return b"".join(out) + + def _upload_chunk(self, final=False): + self.buffer.seek(0) + self.fs.ftp.storbinary( + f"STOR {self.path}", self.buffer, blocksize=self.blocksize, rest=self.offset + ) + return True + + +def _mlsd2(ftp, path="."): + """ + Fall back to using `dir` instead of `mlsd` if not supported. + + This parses a Linux style `ls -l` response to `dir`, but the response may + be platform dependent. + + Parameters + ---------- + ftp: ftplib.FTP + path: str + Expects to be given path, but defaults to ".". + """ + lines = [] + minfo = [] + ftp.dir(path, lines.append) + for line in lines: + split_line = line.split() + if len(split_line) < 9: + continue + this = ( + split_line[-1], + { + "modify": " ".join(split_line[5:8]), + "unix.owner": split_line[2], + "unix.group": split_line[3], + "unix.mode": split_line[0], + "size": split_line[4], + }, + ) + if this[1]["unix.mode"][0] == "d": + this[1]["type"] = "dir" + else: + this[1]["type"] = "file" + minfo.append(this) + return minfo |