Add support for resuming downloads (#654 from nikita-skakun/support-partial-downloads)

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oobabooga 2023-03-31 22:55:55 -03:00 committed by GitHub
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@ -9,6 +9,7 @@ python download-model.py facebook/opt-1.3b
import argparse
import base64
import datetime
import hashlib
import json
import re
import sys
@ -24,11 +25,28 @@ parser.add_argument('--branch', type=str, default='main', help='Name of the Git
parser.add_argument('--threads', type=int, default=1, help='Number of files to download simultaneously.')
parser.add_argument('--text-only', action='store_true', help='Only download text files (txt/json).')
parser.add_argument('--output', type=str, default=None, help='The folder where the model should be saved.')
parser.add_argument('--clean', action='store_true', help='Does not resume the previous download.')
parser.add_argument('--check', action='store_true', help='Validates the checksums of model files.')
args = parser.parse_args()
def get_file(url, output_folder):
r = requests.get(url, stream=True)
with open(output_folder / Path(url.rsplit('/', 1)[1]), 'wb') as f:
filename = Path(url.rsplit('/', 1)[1])
output_path = output_folder / filename
if output_path.exists() and not args.clean:
# Check if the file has already been downloaded completely
r = requests.get(url, stream=True)
total_size = int(r.headers.get('content-length', 0))
if output_path.stat().st_size >= total_size:
return
# Otherwise, resume the download from where it left off
headers = {'Range': f'bytes={output_path.stat().st_size}-'}
mode = 'ab'
else:
headers = {}
mode = 'wb'
r = requests.get(url, stream=True, headers=headers)
with open(output_path, mode) as f:
total_size = int(r.headers.get('content-length', 0))
block_size = 1024
with tqdm.tqdm(total=total_size, unit='iB', unit_scale=True, bar_format='{l_bar}{bar}| {n_fmt:6}/{total_fmt:6} {rate_fmt:6}') as t:
@ -154,7 +172,7 @@ def get_download_links_from_huggingface(model, branch):
return links, sha256, is_lora
def download_files(file_list, output_folder, num_threads=8):
thread_map(lambda url: get_file(url, output_folder), file_list, max_workers=num_threads)
thread_map(lambda url: get_file(url, output_folder), file_list, max_workers=num_threads, disable=True)
if __name__ == '__main__':
model = args.MODEL
@ -184,22 +202,48 @@ if __name__ == '__main__':
output_folder = f"{'_'.join(model.split('/')[-2:])}"
if branch != 'main':
output_folder += f'_{branch}'
# Creating the folder and writing the metadata
output_folder = Path(base_folder) / output_folder
if not output_folder.exists():
output_folder.mkdir()
with open(output_folder / 'huggingface-metadata.txt', 'w') as f:
f.write(f'url: https://huggingface.co/{model}\n')
f.write(f'branch: {branch}\n')
f.write(f'download date: {str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))}\n')
sha256_str = ''
for i in range(len(sha256)):
sha256_str += f' {sha256[i][1]} {sha256[i][0]}\n'
if sha256_str != '':
f.write(f'sha256sum:\n{sha256_str}')
# Downloading the files
print(f"Downloading the model to {output_folder}")
download_files(links, output_folder, args.threads)
print()
if args.check:
# Validate the checksums
validated = True
for i in range(len(sha256)):
fpath = (output_folder / sha256[i][0])
if not fpath.exists():
print(f"The following file is missing: {fpath}")
validated = False
continue
with open(output_folder / sha256[i][0], "rb") as f:
bytes = f.read()
file_hash = hashlib.sha256(bytes).hexdigest()
if file_hash != sha256[i][1]:
print(f'Checksum failed: {sha256[i][0]} {sha256[i][1]}')
validated = False
else:
print(f'Checksum validated: {sha256[i][0]} {sha256[i][1]}')
if validated:
print('[+] Validated checksums of all model files!')
else:
print('[-] Invalid checksums. Rerun download-model.py with the --clean flag.')
else:
# Creating the folder and writing the metadata
if not output_folder.exists():
output_folder.mkdir()
with open(output_folder / 'huggingface-metadata.txt', 'w') as f:
f.write(f'url: https://huggingface.co/{model}\n')
f.write(f'branch: {branch}\n')
f.write(f'download date: {str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))}\n')
sha256_str = ''
for i in range(len(sha256)):
sha256_str += f' {sha256[i][1]} {sha256[i][0]}\n'
if sha256_str != '':
f.write(f'sha256sum:\n{sha256_str}')
# Downloading the files
print(f"Downloading the model to {output_folder}")
download_files(links, output_folder, args.threads)