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# coding=utf-8
# Copyright 2019-present, the HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import io
import os
from os.path import expanduser
from typing import List
import requests
from tqdm import tqdm
ENDPOINT = "https://huggingface.co"
class S3Obj:
def __init__(self, filename: str, LastModified: str, ETag: str, Size: int, **kwargs):
self.filename = filename
self.LastModified = LastModified
self.ETag = ETag
self.Size = Size
class PresignedUrl:
def __init__(self, write: str, access: str, type: str, **kwargs):
self.write = write
self.access = access
self.type = type # mime-type to send to S3.
class HfApi:
def __init__(self, endpoint=None):
self.endpoint = endpoint if endpoint is not None else ENDPOINT
def login(self, username: str, password: str) -> str:
"""
Call HF API to sign in a user and get a token if credentials are valid.
Outputs:
token if credentials are valid
Throws:
requests.exceptions.HTTPError if credentials are invalid
"""
path = "{}/api/login".format(self.endpoint)
r = requests.post(path, json={"username": username, "password": password})
r.raise_for_status()
d = r.json()
return d["token"]
def whoami(self, token: str) -> str:
"""
Call HF API to know "whoami"
"""
path = "{}/api/whoami".format(self.endpoint)
r = requests.get(path, headers={"authorization": "Bearer {}".format(token)})
r.raise_for_status()
d = r.json()
return d["user"]
def logout(self, token: str) -> None:
"""
Call HF API to log out.
"""
path = "{}/api/logout".format(self.endpoint)
r = requests.post(path, headers={"authorization": "Bearer {}".format(token)})
r.raise_for_status()
def presign(self, token: str, filename: str) -> PresignedUrl:
"""
Call HF API to get a presigned url to upload `filename` to S3.
"""
path = "{}/api/presign".format(self.endpoint)
r = requests.post(path, headers={"authorization": "Bearer {}".format(token)}, json={"filename": filename})
r.raise_for_status()
d = r.json()
return PresignedUrl(**d)
def presign_and_upload(self, token: str, filename: str, filepath: str) -> str:
"""
Get a presigned url, then upload file to S3.
Outputs:
url: Read-only url for the stored file on S3.
"""
urls = self.presign(token, filename=filename)
# streaming upload:
# https://2.python-requests.org/en/master/user/advanced/#streaming-uploads
#
# Even though we presign with the correct content-type,
# the client still has to specify it when uploading the file.
with open(filepath, "rb") as f:
pf = TqdmProgressFileReader(f)
data = f if pf.total_size > 0 else ""
r = requests.put(urls.write, data=data, headers={"content-type": urls.type})
r.raise_for_status()
pf.close()
return urls.access
def list_objs(self, token: str) -> List[S3Obj]:
"""
Call HF API to list all stored files for user.
"""
path = "{}/api/listObjs".format(self.endpoint)
r = requests.get(path, headers={"authorization": "Bearer {}".format(token)})
r.raise_for_status()
d = r.json()
return [S3Obj(**x) for x in d]
def delete_obj(self, token: str, filename: str):
"""
Call HF API to delete a file stored by user
"""
path = "{}/api/deleteObj".format(self.endpoint)
r = requests.delete(path, headers={"authorization": "Bearer {}".format(token)}, json={"filename": filename})
r.raise_for_status()
class TqdmProgressFileReader:
"""
Wrap an io.BufferedReader `f` (such as the output of `open(…, "rb")`)
and override `f.read()` so as to display a tqdm progress bar.
see github.com/huggingface/transformers/pull/2078#discussion_r354739608
for implementation details.
"""
def __init__(self, f: io.BufferedReader):
self.f = f
self.total_size = os.fstat(f.fileno()).st_size
self.pbar = tqdm(total=self.total_size, leave=False)
self.read = f.read
f.read = self._read
def _read(self, n=-1):
self.pbar.update(n)
return self.read(n)
def close(self):
self.pbar.close()
class HfFolder:
path_token = expanduser("~/.huggingface/token")
@classmethod
def save_token(cls, token):
"""
Save token, creating folder as needed.
"""
os.makedirs(os.path.dirname(cls.path_token), exist_ok=True)
with open(cls.path_token, "w+") as f:
f.write(token)
@classmethod
def get_token(cls):
"""
Get token or None if not existent.
"""
try:
with open(cls.path_token, "r") as f:
return f.read()
except FileNotFoundError:
pass
@classmethod
def delete_token(cls):
"""
Delete token.
Do not fail if token does not exist.
"""
try:
os.remove(cls.path_token)
except FileNotFoundError:
pass
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