Source code for gcsfs.core

# -*- coding: utf-8 -*-
"""
Google Cloud Storage pythonic interface
"""
import asyncio
import fsspec

import io
import json
import logging
import os
import posixpath
import re
import warnings
import weakref

from fsspec.asyn import sync_wrapper, sync, AsyncFileSystem
from fsspec.utils import stringify_path, setup_logging
from fsspec.callbacks import NoOpCallback
from fsspec.implementations.http import get_client
from .retry import retry_request, validate_response
from .checkers import get_consistency_checker
from .credentials import GoogleCredentials
from . import __version__ as version
from urllib.parse import quote as quote_urllib
from urllib.parse import parse_qs, urlsplit

logger = logging.getLogger("gcsfs")


if "GCSFS_DEBUG" in os.environ:
    setup_logging(logger=logger, level=os.environ["GCSFS_DEBUG"])


# client created 2018-01-16
ACLs = {
    "authenticatedread",
    "bucketownerfullcontrol",
    "bucketownerread",
    "private",
    "projectprivate",
    "publicread",
}
bACLs = {
    "authenticatedRead",
    "private",
    "projectPrivate",
    "publicRead",
    "publicReadWrite",
}
DEFAULT_PROJECT = os.environ.get("GCSFS_DEFAULT_PROJECT", "")

GCS_MIN_BLOCK_SIZE = 2**18
GCS_MAX_BLOCK_SIZE = 2**28
DEFAULT_BLOCK_SIZE = 5 * 2**20

SUPPORTED_FIXED_KEY_METADATA = {
    "content_encoding": "contentEncoding",
    "cache_control": "cacheControl",
    "content_disposition": "contentDisposition",
    "content_language": "contentLanguage",
    "custom_time": "customTime",
}


def quote(s):
    """
    Quote characters to be safe for URL paths.
    Also quotes '/'.

    Parameters
    ----------
    s: input URL/portion

    Returns
    -------
    corrected URL
    """
    # Encode everything, including slashes
    return quote_urllib(s, safe="")


def norm_path(path):
    """
    Canonicalize path to '{bucket}/{name}' form.

    Used by petastorm, do not remove.
    """
    bucket, name, _ = GCSFileSystem._split_path(path)
    return "/".join((bucket, name))


async def _req_to_text(r):
    async with r:
        return (await r.read()).decode()


def _location():
    """
    Resolves GCS HTTP location as http[s]://host

    Enables storage emulation for integration tests.

    Returns
    -------
    valid http location
    """
    _emulator_location = os.environ.get("STORAGE_EMULATOR_HOST", None)
    return (
        _emulator_location if _emulator_location else "https://storage.googleapis.com"
    )


def _chunks(lst, n):
    """
    Yield evenly-sized chunks from a list.

    Implementation based on https://stackoverflow.com/a/312464.
    """
    for i in range(0, len(lst), n):
        yield lst[i : i + n]


def _coalesce_generation(*args):
    """Helper to coalesce a list of object generations down to one."""
    generations = set(args)
    if None in generations:
        generations.remove(None)
    if len(generations) > 1:
        raise ValueError(
            "Cannot coalesce generations where more than one are defined,"
            " {}".format(generations)
        )
    elif len(generations) == 0:
        return None
    else:
        return generations.pop()


[docs]class GCSFileSystem(AsyncFileSystem): r""" Connect to Google Cloud Storage. The following modes of authentication are supported: - ``token=None``, GCSFS will attempt to guess your credentials in the following order: gcloud CLI default, gcsfs cached token, google compute metadata service, anonymous. - ``token='google_default'``, your default gcloud credentials will be used, which are typically established by doing ``gcloud login`` in a terminal. - ``token=='cache'``, credentials from previously successful gcsfs authentication will be used (use this after "browser" auth succeeded) - ``token='anon'``, no authentication is performed, and you can only access data which is accessible to allUsers (in this case, the project and access level parameters are meaningless) - ``token='browser'``, you get an access code with which you can authenticate via a specially provided URL - if ``token='cloud'``, we assume we are running within google compute or google container engine, and query the internal metadata directly for a token. - you may supply a token generated by the [gcloud](https://cloud.google.com/sdk/docs/) utility; this is either a python dictionary, the name of a file containing the JSON returned by logging in with the gcloud CLI tool, or a Credentials object. gcloud typically stores its tokens in locations such as ``~/.config/gcloud/application_default_credentials.json``, `` ~/.config/gcloud/credentials``, or ``~\AppData\Roaming\gcloud\credentials``, etc. Specific methods, (eg. `ls`, `info`, ...) may return object details from GCS. These detailed listings include the [object resource](https://cloud.google.com/storage/docs/json_api/v1/objects#resource) GCS *does not* include "directory" objects but instead generates directories by splitting [object names](https://cloud.google.com/storage/docs/key-terms). This means that, for example, a directory does not need to exist for an object to be created within it. Creating an object implicitly creates it's parent directories, and removing all objects from a directory implicitly deletes the empty directory. `GCSFileSystem` generates listing entries for these implied directories in listing apis with the object properties: - "name" : string The "{bucket}/{name}" path of the dir, used in calls to GCSFileSystem or GCSFile. - "bucket" : string The name of the bucket containing this object. - "kind" : 'storage#object' - "size" : 0 - "storageClass" : 'DIRECTORY' - type: 'directory' (fsspec compat) GCSFileSystem maintains a per-implied-directory cache of object listings and fulfills all object information and listing requests from cache. This implied, for example, that objects created via other processes *will not* be visible to the GCSFileSystem until the cache refreshed. Calls to GCSFileSystem.open and calls to GCSFile are not effected by this cache. In the default case the cache is never expired. This may be controlled via the `cache_timeout` GCSFileSystem parameter or via explicit calls to `GCSFileSystem.invalidate_cache`. Parameters ---------- project : string project_id to work under. Note that this is not the same as, but often very similar to, the project name. This is required in order to list all the buckets you have access to within a project and to create/delete buckets, or update their access policies. If ``token='google_default'``, the value is overridden by the default, if ``token='anon'``, the value is ignored. access : one of {'read_only', 'read_write', 'full_control'} Full control implies read/write as well as modifying metadata, e.g., access control. token: None, dict or string (see description of authentication methods, above) consistency: 'none', 'size', 'md5' Check method when writing files. Can be overridden in open(). cache_timeout: float, seconds Cache expiration time in seconds for object metadata cache. Set cache_timeout <= 0 for no caching, None for no cache expiration. secure_serialize: bool (deprecated) requester_pays : bool, or str default False Whether to use requester-pays requests. This will include your project ID `project` in requests as the `userPorject`, and you'll be billed for accessing data from requester-pays buckets. Optionally, pass a project-id here as a string to use that as the `userProject`. session_kwargs: dict passed on to aiohttp.ClientSession; can contain, for example, proxy settings. endpoint_url: str If given, use this URL (format protocol://host:port , *without* any path part) for communication. If not given, defaults to the value of environment variable "STORAGE_EMULATOR_HOST"; if that is not set either, will use the standard Google endpoint. default_location: str Default location where buckets are created, like 'US' or 'EUROPE-WEST3'. You can find a list of all available locations here: https://cloud.google.com/storage/docs/locations#available-locations version_aware: bool Whether to support object versioning. If enabled this will require the user to have the necessary permissions for dealing with versioned objects. """ scopes = {"read_only", "read_write", "full_control"} retries = 6 # number of retries on http failure default_block_size = DEFAULT_BLOCK_SIZE protocol = "gcs", "gs" async_impl = True def __init__( self, project=DEFAULT_PROJECT, access="full_control", token=None, block_size=None, consistency="none", cache_timeout=None, secure_serialize=True, check_connection=None, requests_timeout=None, requester_pays=False, asynchronous=False, session_kwargs=None, loop=None, timeout=None, endpoint_url=None, default_location=None, version_aware=False, **kwargs, ): super().__init__( self, listings_expiry_time=cache_timeout, asynchronous=asynchronous, loop=loop, **kwargs, ) if access not in self.scopes: raise ValueError("access must be one of {}", self.scopes) if project is None: warnings.warn("GCS project not set - cannot list or create buckets") if block_size is not None: self.default_block_size = block_size self.requester_pays = requester_pays self.consistency = consistency self.cache_timeout = cache_timeout or kwargs.pop("listings_expiry_time", None) self.requests_timeout = requests_timeout self.timeout = timeout self._session = None self._endpoint = endpoint_url self.session_kwargs = session_kwargs or {} self.default_location = default_location self.version_aware = version_aware if check_connection: warnings.warn( "The `check_connection` argument is deprecated and will be removed in a future release.", DeprecationWarning, ) self.credentials = GoogleCredentials(project, access, token) if not self.asynchronous: self._session = sync( self.loop, get_client, timeout=self.timeout, **self.session_kwargs ) weakref.finalize(self, self.close_session, self.loop, self._session) @property def _location(self): return self._endpoint or _location() @property def base(self): return f"{self._location}/storage/v1/" @property def project(self): return self.credentials.project @staticmethod def close_session(loop, session): if loop is not None and session is not None: if loop.is_running(): try: sync(loop, session.close, timeout=0.1) except fsspec.FSTimeoutError: pass else: pass async def _set_session(self): if self._session is None: self._session = await get_client(**self.session_kwargs) return self._session @property def session(self): if self.asynchronous and self._session is None: raise RuntimeError("Please await _connect* before anything else") return self._session @classmethod def _strip_protocol(cls, path): if isinstance(path, list): return [cls._strip_protocol(p) for p in path] path = stringify_path(path) protos = (cls.protocol,) if isinstance(cls.protocol, str) else cls.protocol for protocol in protos: if path.startswith(protocol + "://"): path = path[len(protocol) + 3 :] elif path.startswith(protocol + "::"): path = path[len(protocol) + 2 :] # use of root_marker to make minimum required path, e.g., "/" return path or cls.root_marker @classmethod def _get_kwargs_from_urls(cls, path): _, _, generation = cls._split_path(path, version_aware=True) if generation is not None: return {"version_aware": True} return {} def _get_params(self, kwargs): params = {k: v for k, v in kwargs.items() if v is not None} # needed for requester pays buckets if self.requester_pays: if isinstance(self.requester_pays, str): user_project = self.requester_pays else: user_project = self.project params["userProject"] = user_project return params def _get_headers(self, headers): out = {} if headers is not None: out.update(headers) if "User-Agent" not in out: out["User-Agent"] = "python-gcsfs/" + version self.credentials.apply(out) return out def _format_path(self, path, args): if not path.startswith("http"): path = self.base + path if args: path = path.format(*[quote(p) for p in args]) return path @retry_request(retries=retries) async def _request( self, method, path, *args, headers=None, json=None, data=None, **kwargs ): await self._set_session() async with self.session.request( method=method, url=self._format_path(path, args), params=self._get_params(kwargs), json=json, headers=self._get_headers(headers), data=data, timeout=self.requests_timeout, ) as r: status = r.status headers = r.headers info = r.request_info # for debug only contents = await r.read() validate_response(status, contents, path, args) return status, headers, info, contents async def _call( self, method, path, *args, json_out=False, info_out=False, **kwargs ): logger.debug(f"{method.upper()}: {path}, {args}, {kwargs.get('headers')}") status, headers, info, contents = await self._request( method, path, *args, **kwargs ) if json_out: return json.loads(contents) elif info_out: return info else: return headers, contents call = sync_wrapper(_call) @property def buckets(self): """Return list of available project buckets.""" return [ b["name"] for b in sync(self.loop, self._list_buckets, timeout=self.timeout) ] def _process_object(self, bucket, object_metadata): """Process object resource into gcsfs object information format. Process GCS object resource via type casting and attribute updates to the cache-able gcsfs object information format. Returns an updated copy of the object resource. (See https://cloud.google.com/storage/docs/json_api/v1/objects#resource) """ result = dict(object_metadata) result["size"] = int(object_metadata.get("size", 0)) result["name"] = posixpath.join(bucket, object_metadata["name"]) result["type"] = "file" if "generation" in object_metadata or "metageneration" in object_metadata: result["generation"] = object_metadata.get("generation") result["metageneration"] = object_metadata.get("metageneration") return result async def _make_bucket_requester_pays(self, path, state=True): # this is really some form of setACL/chmod # perhaps should be automatic if gcs.requester_pays json = {"billing": {"requesterPays": state}} await self._call("PATCH", f"b/{path}", json=json) make_bucket_requester_pays = sync_wrapper(_make_bucket_requester_pays) async def _get_object(self, path): """Return object information at the given path.""" bucket, key, generation = self.split_path(path) # Check if parent dir is in listing cache listing = self._ls_from_cache(path) if listing: name = "/".join((bucket, key)) for file_details in listing: if ( file_details["type"] == "file" and file_details["name"] == name and (not generation or file_details.get("generation") == generation) ): return file_details else: raise FileNotFoundError(path) if not key: # Attempt to "get" the bucket root, return error instead of # listing. raise FileNotFoundError(path) res = None # Work around various permission settings. Prefer an object get (storage.objects.get), but # fall back to a bucket list + filter to object name (storage.objects.list). try: res = await self._call( "GET", "b/{}/o/{}", bucket, key, json_out=True, generation=generation ) except OSError as e: if not str(e).startswith("Forbidden"): raise resp = await self._call( "GET", "b/{}/o", bucket, json_out=True, prefix=key, maxResults=1 if not generation else None, versions="true" if generation else None, ) for item in resp.get("items", []): if item["name"] == key and ( not generation or item.get("generation") == generation ): res = item break if res is None: raise FileNotFoundError(path) return self._process_object(bucket, res) async def _list_objects(self, path, prefix="", versions=False): bucket, key, generation = self.split_path(path) path = path.rstrip("/") try: clisting = self._ls_from_cache(path) hassubdirs = clisting and any( c["name"].rstrip("/") == path and c["type"] == "directory" for c in clisting ) if clisting and not hassubdirs: return clisting except FileNotFoundError: # not finding a bucket in list of "my" buckets is OK if key: raise items, prefixes = await self._do_list_objects( path, prefix=prefix, versions=versions ) pseudodirs = [ { "bucket": bucket, "name": bucket + "/" + prefix.strip("/"), "size": 0, "storageClass": "DIRECTORY", "type": "directory", } for prefix in prefixes ] if not (items + pseudodirs): if key: return [await self._get_object(path)] else: return [] out = pseudodirs + items # Don't cache prefixed/partial listings if not prefix: self.dircache[path] = out return out async def _do_list_objects( self, path, max_results=None, delimiter="/", prefix="", versions=False ): """Object listing for the given {bucket}/{prefix}/ path.""" bucket, _path, generation = self.split_path(path) _path = "" if not _path else _path.rstrip("/") + "/" prefix = f"{_path}{prefix}" or None prefixes = [] items = [] page = await self._call( "GET", "b/{}/o", bucket, delimiter=delimiter, prefix=prefix, maxResults=max_results, json_out=True, versions="true" if versions or generation else None, ) prefixes.extend(page.get("prefixes", [])) items.extend(page.get("items", [])) next_page_token = page.get("nextPageToken", None) while next_page_token is not None: page = await self._call( "GET", "b/{}/o", bucket, delimiter=delimiter, prefix=prefix, maxResults=max_results, pageToken=next_page_token, json_out=True, versions="true" if generation else None, ) assert page["kind"] == "storage#objects" prefixes.extend(page.get("prefixes", [])) items.extend(page.get("items", [])) next_page_token = page.get("nextPageToken", None) items = [self._process_object(bucket, i) for i in items] return items, prefixes async def _list_buckets(self): """Return list of all buckets under the current project.""" if "" not in self.dircache: items = [] page = await self._call("GET", "b", project=self.project, json_out=True) assert page["kind"] == "storage#buckets" items.extend(page.get("items", [])) next_page_token = page.get("nextPageToken", None) while next_page_token is not None: page = await self._call( "GET", "b", project=self.project, pageToken=next_page_token, json_out=True, ) assert page["kind"] == "storage#buckets" items.extend(page.get("items", [])) next_page_token = page.get("nextPageToken", None) buckets = [ {**i, "name": i["name"] + "/", "size": 0, "type": "directory"} for i in items ] self.dircache[""] = buckets return buckets return self.dircache[""]
[docs] def invalidate_cache(self, path=None): """ Invalidate listing cache for given path, it is reloaded on next use. Parameters ---------- path: string or None If None, clear all listings cached else listings at or under given path. """ if path is None: logger.debug("invalidate_cache clearing cache") self.dircache.clear() else: path = self._strip_protocol(path).rstrip("/") while path: self.dircache.pop(path, None) path = self._parent(path)
async def _mkdir( self, path, acl="projectPrivate", default_acl="bucketOwnerFullControl", location=None, create_parents=True, enable_versioning=False, **kwargs, ): """ New bucket If path is more than just a bucket, will create bucket if create_parents=True; otherwise is a noop. If create_parents is False and bucket does not exist, will produce FileNotFFoundError. Parameters ---------- path: str bucket name. If contains '/' (i.e., looks like subdir), will have no effect because GCS doesn't have real directories. acl: string, one of bACLs access for the bucket itself default_acl: str, one of ACLs default ACL for objects created in this bucket location: Optional[str] Location where buckets are created, like 'US' or 'EUROPE-WEST3'. If not provided, defaults to `self.default_location`. You can find a list of all available locations here: https://cloud.google.com/storage/docs/locations#available-locations create_parents: bool If True, creates the bucket in question, if it doesn't already exist enable_versioning: bool If True, creates the bucket in question with object versioning enabled. """ bucket, object, generation = self.split_path(path) if bucket in ["", "/"]: raise ValueError("Cannot create root bucket") if "/" in path and create_parents and await self._exists(bucket): # nothing to do return if "/" in path and not create_parents: if await self._exists(bucket): return raise FileNotFoundError(bucket) json_data = {"name": bucket} location = location or self.default_location if location: json_data["location"] = location if enable_versioning: json_data["versioning"] = {"enabled": True} await self._call( method="POST", path="b", predefinedAcl=acl, project=self.project, predefinedDefaultObjectAcl=default_acl, json=json_data, json_out=True, ) self.invalidate_cache(bucket) mkdir = sync_wrapper(_mkdir) async def _rmdir(self, bucket): """Delete an empty bucket Parameters ---------- bucket: str bucket name. If contains '/' (i.e., looks like subdir), will have no effect because GCS doesn't have real directories. """ bucket = bucket.rstrip("/") if "/" in bucket: return await self._call("DELETE", "b/" + bucket, json_out=False) self.invalidate_cache(bucket) self.invalidate_cache("") rmdir = sync_wrapper(_rmdir) async def _info(self, path, generation=None, **kwargs): """File information about this path.""" path = self._strip_protocol(path) if "/" not in path: try: out = await self._call("GET", f"b/{path}", json_out=True) out.update(size=0, type="directory") except OSError: # GET bucket failed, try ls; will have no metadata exists = await self._ls(path) if exists: out = {"name": path, "size": 0, "type": "directory"} else: raise FileNotFoundError(path) return out # Check directory cache for parent dir parent_path = self._parent(path) parent_cache = self._ls_from_cache(parent_path) bucket, key, path_generation = self.split_path(path) generation = _coalesce_generation(generation, path_generation) if parent_cache: name = "/".join((bucket, key)) for o in parent_cache: if o["name"].rstrip("/") == name and ( not generation or o.get("generation") == generation ): return o if self._ls_from_cache(path): # this is a directory return { "bucket": bucket, "name": path.rstrip("/"), "size": 0, "storageClass": "DIRECTORY", "type": "directory", } # Check exact file path try: exact = await self._get_object(path) # this condition finds a "placeholder" - still need to check if it's a directory if exact["size"] or not exact["name"].endswith("/"): return exact except FileNotFoundError: pass kwargs["detail"] = True # Force to true for info out = await self._ls(path, **kwargs) out0 = [o for o in out if o["name"].rstrip("/") == path] if out0: # exact hit return out0[0] elif out: # other stuff - must be a directory return { "bucket": bucket, "name": path.rstrip("/"), "size": 0, "storageClass": "DIRECTORY", "type": "directory", } else: raise FileNotFoundError(path) async def _glob(self, path, prefix="", **kwargs): if not prefix: # Identify pattern prefixes. Ripped from fsspec.spec.AbstractFileSystem.glob and matches # the glob.has_magic patterns. indstar = path.find("*") if path.find("*") >= 0 else len(path) indques = path.find("?") if path.find("?") >= 0 else len(path) indbrace = path.find("[") if path.find("[") >= 0 else len(path) ind = min(indstar, indques, indbrace) prefix = path[:ind].split("/")[-1] return await super()._glob(path, prefix=prefix, **kwargs) async def _ls(self, path, detail=False, prefix="", versions=False, **kwargs): """List objects under the given '/{bucket}/{prefix} path.""" path = self._strip_protocol(path).rstrip("/") if path in ["/", ""]: out = await self._list_buckets() else: out = [] for entry in await self._list_objects( path, prefix=prefix, versions=versions ): if versions: out.append( { **entry, "name": f"{entry['name']}#{entry['generation']}", } ) else: out.append(entry) if detail: return out else: return sorted([o["name"] for o in out])
[docs] def url(self, path): """Get HTTP URL of the given path""" u = "{}/download/storage/v1/b/{}/o/{}?alt=media{}" bucket, object, generation = self.split_path(path) object = quote(object) return u.format( self._location, bucket, object, "&generation={}".format(generation) if generation else "", )
async def _cat_file(self, path, start=None, end=None, **kwargs): """Simple one-shot get of file data""" u2 = self.url(path) if start or end: head = {"Range": await self._process_limits(path, start, end)} else: head = {} headers, out = await self._call("GET", u2, headers=head) return out async def _getxattr(self, path, attr): """Get user-defined metadata attribute""" meta = (await self._info(path)).get("metadata", {}) return meta[attr] getxattr = sync_wrapper(_getxattr) async def _setxattrs( self, path, content_type=None, content_encoding=None, fixed_key_metadata=None, **kwargs, ): """Set/delete/add writable metadata attributes Note: uses PATCH method (update), leaving unedited keys alone. fake-gcs-server:latest does not seem to support this. Parameters --------- content_type: str If not None, set the content-type to this value content_encoding: str This parameter is deprecated, you may use fixed_key_metadata instead. If not None, set the content-encoding. See https://cloud.google.com/storage/docs/transcoding fixed_key_metadata: dict Google metadata, in key/value pairs, supported keys: - cache_control - content_disposition - content_encoding - content_language - custom_time More info: https://cloud.google.com/storage/docs/metadata#mutable kw_args: key-value pairs like field="value" or field=None value must be string to add or modify, or None to delete Returns ------- Entire metadata after update (even if only path is passed) """ i_json = {"metadata": kwargs} if content_type is not None: i_json["contentType"] = content_type if content_encoding is not None: logger.warn( "setxattrs: content_encoding parameter is now deprecated " "you may use `fixed_key_metadata` instead" ) i_json["contentEncoding"] = content_encoding i_json.update(_convert_fixed_key_metadata(fixed_key_metadata)) bucket, key, generation = self.split_path(path) o_json = await self._call( "PATCH", "b/{}/o/{}", bucket, key, fields="metadata", json=i_json, json_out=True, ) return o_json.get("metadata", {}) setxattrs = sync_wrapper(_setxattrs) async def _merge(self, path, paths, acl=None): """Concatenate objects within a single bucket""" bucket, key, generation = self.split_path(path) source = [{"name": self.split_path(p)[1]} for p in paths] await self._call( "POST", "b/{}/o/{}/compose", bucket, key, destinationPredefinedAcl=acl, headers={"Content-Type": "application/json"}, json={ "sourceObjects": source, "kind": "storage#composeRequest", "destination": {"name": key, "bucket": bucket}, }, ) merge = sync_wrapper(_merge) async def _cp_file(self, path1, path2, acl=None, **kwargs): """Duplicate remote file""" b1, k1, g1 = self.split_path(path1) b2, k2, g2 = self.split_path(path2) if g2: raise ValueError("Cannot write to specific object generation") out = await self._call( "POST", "b/{}/o/{}/rewriteTo/b/{}/o/{}", b1, k1, b2, k2, headers={"Content-Type": "application/json"}, destinationPredefinedAcl=acl, json_out=True, sourceGeneration=g1, ) while out["done"] is not True: out = await self._call( "POST", "b/{}/o/{}/rewriteTo/b/{}/o/{}", b1, k1, b2, k2, headers={"Content-Type": "application/json"}, rewriteToken=out["rewriteToken"], destinationPredefinedAcl=acl, json_out=True, sourceGeneration=g1, ) async def _rm_file(self, path, **kwargs): bucket, key, generation = self.split_path(path) if key: await self._call("DELETE", "b/{}/o/{}", bucket, key, generation=generation) self.invalidate_cache(posixpath.dirname(self._strip_protocol(path))) else: await self._rmdir(path) async def _rm_files(self, paths): template = ( "\n--===============7330845974216740156==\n" "Content-Type: application/http\n" "Content-Transfer-Encoding: binary\n" "Content-ID: <b29c5de2-0db4-490b-b421-6a51b598bd11+{i}>" "\n\nDELETE /storage/v1/b/{bucket}/o/{key}{query} HTTP/1.1\n" "Content-Type: application/json\n" "accept: application/json\ncontent-length: 0\n" ) errors = [] # Splitting requests into 100 chunk batches # See https://cloud.google.com/storage/docs/batch for chunk in _chunks(paths, 100): parts = [] for i, p in enumerate(chunk): bucket, key, generation = self.split_path(p) query = f"?generation={generation}" if generation else "" parts.append( template.format( i=i + 1, bucket=quote(bucket), key=quote(key), query=query, ) ) body = "".join(parts) headers, content = await self._call( "POST", f"{self._location}/batch/storage/v1", headers={ "Content-Type": 'multipart/mixed; boundary="==========' '=====7330845974216740156=="' }, data=body + "\n--===============7330845974216740156==--", ) boundary = headers["Content-Type"].split("=", 1)[1] parents = [self._parent(p) for p in paths] [self.invalidate_cache(parent) for parent in parents + list(paths)] txt = content.decode() if any( not ("200 OK" in c or "204 No Content" in c) for c in txt.split(boundary)[1:-1] ): pattern = '"message": "([^"]+)"' out = set(re.findall(pattern, txt)) errors.extend(out) if errors: raise OSError(errors) @property def on_google(self): return "torage.googleapis.com" in self._location async def _rm(self, path, recursive=False, maxdepth=None, batchsize=20): paths = await self._expand_path(path, recursive=recursive, maxdepth=maxdepth) files = [p for p in paths if self.split_path(p)[1]] dirs = [p for p in paths if not self.split_path(p)[1]] if self.on_google: # emulators do not support batch exs = await asyncio.gather( *( [ self._rm_files(files[i : i + batchsize]) for i in range(0, len(files), batchsize) ] ), return_exceptions=True, ) else: exs = await asyncio.gather( *([self._rm_file(f) for f in files]), return_exceptions=True, ) exs = [ ex for ex in exs if ex is not None and "No such object" not in str(ex) and not isinstance(ex, FileNotFoundError) ] if exs: raise exs[0] await asyncio.gather(*[self._rmdir(d) for d in dirs]) rm = sync_wrapper(_rm) async def _pipe_file( self, path, data, metadata=None, consistency=None, content_type="application/octet-stream", chunksize=50 * 2**20, ): # enforce blocksize should be a multiple of 2**18 consistency = consistency or self.consistency bucket, key, generation = self.split_path(path) size = len(data) out = None if size < 5 * 2**20: location = await simple_upload( self, bucket, key, data, metadata, consistency, content_type ) else: location = await initiate_upload(self, bucket, key, content_type, metadata) for offset in range(0, len(data), chunksize): bit = data[offset : offset + chunksize] out = await upload_chunk( self, location, bit, offset, size, content_type ) checker = get_consistency_checker(consistency) checker.update(data) checker.validate_json_response(out) self.invalidate_cache(self._parent(path)) return location async def _put_file( self, lpath, rpath, metadata=None, consistency=None, content_type="application/octet-stream", chunksize=50 * 2**20, callback=None, **kwargs, ): # enforce blocksize should be a multiple of 2**18 if os.path.isdir(lpath): return callback = callback or NoOpCallback() consistency = consistency or self.consistency checker = get_consistency_checker(consistency) bucket, key, generation = self.split_path(rpath) if generation: raise ValueError("Cannot write to specific object generation") with open(lpath, "rb") as f0: size = f0.seek(0, 2) f0.seek(0) callback.set_size(size) if size < 5 * 2**20: await simple_upload( self, bucket, key, f0.read(), consistency=consistency, metadatain=metadata, content_type=content_type, ) callback.absolute_update(size) else: location = await initiate_upload( self, bucket, key, content_type, metadata ) offset = 0 while True: bit = f0.read(chunksize) if not bit: break out = await upload_chunk( self, location, bit, offset, size, content_type ) offset += len(bit) callback.absolute_update(offset) checker.update(bit) checker.validate_json_response(out) self.invalidate_cache(self._parent(rpath)) async def _isdir(self, path): try: return (await self._info(path))["type"] == "directory" except IOError: return False async def _find( self, path, withdirs=False, detail=False, prefix="", versions=False, **kwargs ): path = self._strip_protocol(path) bucket, key, generation = self.split_path(path) if prefix: _path = "" if not key else key.rstrip("/") + "/" _prefix = f"{_path}{prefix}" else: _prefix = key objects, _ = await self._do_list_objects( bucket, delimiter="", prefix=_prefix, versions=versions ) dirs = {} cache_entries = {} for obj in objects: parent = self._parent(obj["name"]) previous = obj while parent: dir_key = self.split_path(parent)[1] if not dir_key or len(parent) < len(path): break dirs[parent] = { "Key": dir_key, "Size": 0, "name": parent, "StorageClass": "DIRECTORY", "type": "directory", "size": 0, } cache_entries.setdefault(parent, []).append(previous) previous = dirs[parent] parent = self._parent(parent) if not prefix: self.dircache.update(cache_entries) if withdirs: objects = sorted(objects + list(dirs.values()), key=lambda x: x["name"]) if detail: if versions: return {f"{o['name']}#{o['generation']}": o for o in objects} return {o["name"]: o for o in objects} if versions: return [f"{o['name']}#{o['generation']}" for o in objects] return [o["name"] for o in objects] @retry_request(retries=retries) async def _get_file_request( self, rpath, lpath, *args, headers=None, callback=None, **kwargs ): consistency = kwargs.pop("consistency", self.consistency) async with self.session.get( url=rpath, params=self._get_params(kwargs), headers=self._get_headers(headers), timeout=self.requests_timeout, ) as r: r.raise_for_status() try: size = int(r.headers["content-length"]) except (KeyError, ValueError): size = None callback.set_size(size) checker = get_consistency_checker(consistency) os.makedirs(os.path.dirname(lpath), exist_ok=True) with open(lpath, "wb") as f2: while True: data = await r.content.read(4096 * 32) if not data: break f2.write(data) checker.update(data) callback.relative_update(len(data)) validate_response(r.status, data, rpath) # validate http request checker.validate_http_response(r) # validate file consistency return r.status, r.headers, r.request_info, data async def _get_file(self, rpath, lpath, callback=None, **kwargs): u2 = self.url(rpath) if os.path.isdir(lpath): return callback = callback or NoOpCallback() await self._get_file_request(u2, lpath, callback=callback, **kwargs) def _open( self, path, mode="rb", block_size=None, cache_options=None, acl=None, consistency=None, metadata=None, autocommit=True, fixed_key_metadata=None, generation=None, **kwargs, ): """ See ``GCSFile``. consistency: None or str If None, use default for this instance """ if block_size is None: block_size = self.default_block_size const = consistency or self.consistency return GCSFile( self, path, mode, block_size, cache_options=cache_options, consistency=const, metadata=metadata, acl=acl, autocommit=autocommit, fixed_key_metadata=fixed_key_metadata, **kwargs, ) @classmethod def _split_path(cls, path, version_aware=False): """ Normalise GCS path string into bucket and key. Parameters ---------- path : string Input path, like `gcs://mybucket/path/to/file`. Path is of the form: '[gs|gcs://]bucket[/key][?querystring][#fragment]' GCS allows object generation (object version) to be specified in either the URL fragment or the `generation` query parameter. When provided, the fragment will take priority over the `generation` query paramenter. Returns ------- (bucket, key, generation) tuple """ path = cls._strip_protocol(path).lstrip("/") if "/" not in path: return path, "", None bucket, keypart = path.split("/", 1) key = keypart generation = None if version_aware: parts = urlsplit(keypart) try: if parts.fragment: generation = parts.fragment elif parts.query: parsed = parse_qs(parts.query) if "generation" in parsed: generation = parsed["generation"][0] # Sanity check whether this could be a valid generation ID. If # it is not, assume that # or ? characters are supposed to be # part of the object name. if generation is not None: int(generation) key = parts.path except ValueError: generation = None return ( bucket, key, generation, ) def split_path(self, path): return self._split_path(path, version_aware=self.version_aware)
[docs] def sign(self, path, expiration=100, **kwargs): """Create a signed URL representing the given path. Parameters ---------- path : str The path on the filesystem expiration : int Number of seconds to enable the URL for Returns ------- URL : str The signed URL """ from google.cloud import storage bucket, key = self.split_path(path) client = storage.Client( credentials=self.credentials.credentials, project=self.project ) bucket = client.bucket(bucket) blob = bucket.blob(key) return blob.generate_signed_url(expiration=expiration, **kwargs)
GoogleCredentials.load_tokens()
[docs]class GCSFile(fsspec.spec.AbstractBufferedFile): def __init__( self, gcsfs, path, mode="rb", block_size=DEFAULT_BLOCK_SIZE, autocommit=True, cache_type="readahead", cache_options=None, acl=None, consistency="md5", metadata=None, content_type=None, timeout=None, fixed_key_metadata=None, generation=None, **kwargs, ): """ Open a file. Parameters ---------- gcsfs: instance of GCSFileSystem path: str location in GCS, like 'bucket/path/to/file' mode: str Normal file modes. Currently only 'wb' amd 'rb'. block_size: int Buffer size for reading or writing acl: str ACL to apply, if any, one of ``ACLs``. New files are normally "bucketownerfullcontrol", but a default can be configured per bucket. consistency: str, 'none', 'size', 'md5', 'crc32c' Check for success in writing, applied at file close. 'size' ensures that the number of bytes reported by GCS matches the number we wrote; 'md5' does a full checksum. Any value other than 'size' or 'md5' or 'crc32c' is assumed to mean no checking. content_type: str default is `application/octet-stream`. See the list of available content types at https://www.iana.org/assignments/media-types/media-types.txt metadata: dict Custom metadata, in key/value pairs, added at file creation fixed_key_metadata: dict Google metadata, in key/value pairs, supported keys: - cache_control - content_disposition - content_encoding - content_language - custom_time More info: https://cloud.google.com/storage/docs/metadata#mutable timeout: int Timeout seconds for the asynchronous callback. generation: str Object generation. """ bucket, key, path_generation = gcsfs.split_path(path) if not key: raise OSError("Attempt to open a bucket") self.generation = _coalesce_generation(generation, path_generation) super().__init__( gcsfs, path, mode, block_size, autocommit=autocommit, cache_type=cache_type, cache_options=cache_options, **kwargs, ) self.gcsfs = gcsfs self.bucket = bucket self.key = key self.acl = acl self.checker = get_consistency_checker(consistency) if "r" in self.mode: det = self.details else: det = {} self.content_type = content_type or det.get( "contentType", "application/octet-stream" ) self.metadata = metadata or det.get("metadata", {}) self.fixed_key_metadata = _convert_fixed_key_metadata(det, from_google=True) self.fixed_key_metadata.update(fixed_key_metadata or {}) self.timeout = timeout if mode == "wb": if self.blocksize < GCS_MIN_BLOCK_SIZE: warnings.warn("Setting block size to minimum value, 2**18") self.blocksize = GCS_MIN_BLOCK_SIZE self.location = None @property def details(self): if self._details is None: self._details = self.fs.info(self.path, generation=self.generation) return self._details
[docs] def info(self): """File information about this path""" return self.details
[docs] def url(self): """HTTP link to this file's data""" return self.fs.url(self.path)
def _upload_chunk(self, final=False): """Write one part of a multi-block file upload Parameters ---------- final: bool Complete and commit upload """ while True: # shortfall splits blocks bigger than max allowed upload data = self.buffer.getvalue() head = {} l = len(data) if (l < GCS_MIN_BLOCK_SIZE) and not final: # either flush() was called, but we don't have enough to # push, or we split a big upload, and have less left than one # block. If this is the final part, OK to violate those # terms. return False # Select the biggest possible chunk of data to be uploaded chunk_length = min(l, GCS_MAX_BLOCK_SIZE) chunk = data[:chunk_length] if final and self.autocommit and chunk_length == l: if l: # last chunk head["Content-Range"] = "bytes %i-%i/%i" % ( self.offset, self.offset + chunk_length - 1, self.offset + l, ) else: # closing when buffer is empty head["Content-Range"] = "bytes */%i" % self.offset data = None else: head["Content-Range"] = "bytes %i-%i/*" % ( self.offset, self.offset + chunk_length - 1, ) head.update( {"Content-Type": self.content_type, "Content-Length": str(chunk_length)} ) headers, contents = self.gcsfs.call( "POST", self.location, headers=head, data=chunk ) if "Range" in headers: end = int(headers["Range"].split("-")[1]) shortfall = (self.offset + l - 1) - end if shortfall > 0: self.checker.update(data[:-shortfall]) self.buffer = io.BytesIO(data[-shortfall:]) self.buffer.seek(shortfall) self.offset += l - shortfall continue else: self.checker.update(data) else: assert final, "Response looks like upload is over" if l: j = json.loads(contents) self.checker.update(data) self.checker.validate_json_response(j) # Clear buffer and update offset when all is received self.buffer = io.BytesIO() self.offset += l break return True
[docs] def commit(self): """If not auto-committing, finalize file""" self.autocommit = True self._upload_chunk(final=True)
def _initiate_upload(self): """Create multi-upload""" self.location = sync( self.gcsfs.loop, initiate_upload, self.gcsfs, self.bucket, self.key, self.content_type, self.metadata, self.fixed_key_metadata, timeout=self.timeout, )
[docs] def discard(self): """Cancel in-progress multi-upload Should only happen during discarding this write-mode file """ if self.location is None: return uid = re.findall("upload_id=([^&=?]+)", self.location) self.gcsfs.call( "DELETE", f"{self.fs._location}/upload/storage/v1/b/{quote(self.bucket)}/o", params={"uploadType": "resumable", "upload_id": uid}, json_out=True, )
def _simple_upload(self): """One-shot upload, less than 5MB""" self.buffer.seek(0) data = self.buffer.read() sync( self.gcsfs.loop, simple_upload, self.gcsfs, self.bucket, self.key, data, self.metadata, self.consistency, self.content_type, self.fixed_key_metadata, timeout=self.timeout, ) def _fetch_range(self, start=None, end=None): """Get data from GCS start, end : None or integers if not both None, fetch only given range """ try: return self.gcsfs.cat_file(self.path, start=start, end=end) except RuntimeError as e: if "not satisfiable" in str(e): return b"" raise
def _convert_fixed_key_metadata(metadata, *, from_google=False): """ Convert fixed_key_metadata to/from GCS format. Google uses camelCase for its parameters, this function transform exposed fixed_key_metadata (snake_case) to or from GCS(google) format Parameters ---------- metadata: dict A key value pair of fixed_key_metadata, key can be either camel case or snake case. from_google: bool True means that the metadata come from google and thus should be converted to snake_case """ out = {} if metadata is None: return out for key, attribute_name in SUPPORTED_FIXED_KEY_METADATA.items(): src = key if not from_google else attribute_name dst = attribute_name if not from_google else key if src in metadata: out[dst] = metadata[src] return out async def upload_chunk(fs, location, data, offset, size, content_type): head = {} l = len(data) range = "bytes %i-%i/%i" % (offset, offset + l - 1, size) head["Content-Range"] = range head.update({"Content-Type": content_type, "Content-Length": str(l)}) headers, txt = await fs._call("POST", location, headers=head, data=data) if "Range" in headers: end = int(headers["Range"].split("-")[1]) shortfall = (offset + l - 1) - end if shortfall: return await upload_chunk( fs, location, data[-shortfall:], end, size, content_type ) return json.loads(txt) if txt else None async def initiate_upload( fs, bucket, key, content_type="application/octet-stream", metadata=None, fixed_key_metadata=None, ): j = {"name": key} if metadata: j["metadata"] = metadata j.update(_convert_fixed_key_metadata(fixed_key_metadata)) headers, _ = await fs._call( method="POST", path=f"{fs._location}/upload/storage/v1/b/{quote(bucket)}/o", uploadType="resumable", json=j, headers={"X-Upload-Content-Type": content_type}, ) loc = headers["Location"] out = loc[0] if isinstance(loc, list) else loc # <- for CVR responses if len(str(loc)) < 20: logger.error("Location failed: %s" % headers) return out async def simple_upload( fs, bucket, key, datain, metadatain=None, consistency=None, content_type="application/octet-stream", fixed_key_metadata=None, ): checker = get_consistency_checker(consistency) path = f"{fs._location}/upload/storage/v1/b/{quote(bucket)}/o" metadata = {"name": key} if metadatain is not None: metadata["metadata"] = metadatain metadata.update(_convert_fixed_key_metadata(fixed_key_metadata)) metadata = json.dumps(metadata) template = ( "--==0==" "\nContent-Type: application/json; charset=UTF-8" "\n\n" + metadata + "\n--==0==" + "\nContent-Type: {0}".format(content_type) + "\n\n" ) data = template.encode() + datain + b"\n--==0==--" j = await fs._call( "POST", path, uploadType="multipart", headers={"Content-Type": 'multipart/related; boundary="==0=="'}, data=data, json_out=True, ) checker.update(datain) checker.validate_json_response(j)