109 lines
4.5 KiB
Python
109 lines
4.5 KiB
Python
# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
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"""
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Download utils
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"""
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import logging
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import os
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import subprocess
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import urllib
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from pathlib import Path
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import requests
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import torch
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def is_url(url, check=True):
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# Check if string is URL and check if URL exists
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try:
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url = str(url)
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result = urllib.parse.urlparse(url)
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assert all([result.scheme, result.netloc]) # check if is url
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return (urllib.request.urlopen(url).getcode() == 200) if check else True # check if exists online
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except (AssertionError, urllib.request.HTTPError):
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return False
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def gsutil_getsize(url=''):
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# gs://bucket/file size https://cloud.google.com/storage/docs/gsutil/commands/du
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s = subprocess.check_output(f'gsutil du {url}', shell=True).decode('utf-8')
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return eval(s.split(' ')[0]) if len(s) else 0 # bytes
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def url_getsize(url='https://ultralytics.com/images/bus.jpg'):
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# Return downloadable file size in bytes
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response = requests.head(url, allow_redirects=True)
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return int(response.headers.get('content-length', -1))
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def safe_download(file, url, url2=None, min_bytes=1E0, error_msg=''):
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# Attempts to download file from url or url2, checks and removes incomplete downloads < min_bytes
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from utils.general import LOGGER
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file = Path(file)
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assert_msg = f"Downloaded file '{file}' does not exist or size is < min_bytes={min_bytes}"
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try: # url1
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LOGGER.info(f'Downloading {url} to {file}...')
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torch.hub.download_url_to_file(url, str(file), progress=LOGGER.level <= logging.INFO)
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assert file.exists() and file.stat().st_size > min_bytes, assert_msg # check
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except Exception as e: # url2
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if file.exists():
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file.unlink() # remove partial downloads
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LOGGER.info(f'ERROR: {e}\nRe-attempting {url2 or url} to {file}...')
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os.system(f"curl -# -L '{url2 or url}' -o '{file}' --retry 3 -C -") # curl download, retry and resume on fail
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finally:
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if not file.exists() or file.stat().st_size < min_bytes: # check
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if file.exists():
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file.unlink() # remove partial downloads
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LOGGER.info(f"ERROR: {assert_msg}\n{error_msg}")
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LOGGER.info('')
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def attempt_download(file, repo='ultralytics/yolov5', release='v7.0'):
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# Attempt file download from GitHub release assets if not found locally. release = 'latest', 'v7.0', etc.
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from utils.general import LOGGER
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def github_assets(repository, version='latest'):
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# Return GitHub repo tag (i.e. 'v7.0') and assets (i.e. ['yolov5s.pt', 'yolov5m.pt', ...])
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if version != 'latest':
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version = f'tags/{version}' # i.e. tags/v7.0
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response = requests.get(f'https://api.github.com/repos/{repository}/releases/{version}').json() # github api
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return response['tag_name'], [x['name'] for x in response['assets']] # tag, assets
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file = Path(str(file).strip().replace("'", ''))
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if not file.exists():
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# URL specified
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name = Path(urllib.parse.unquote(str(file))).name # decode '%2F' to '/' etc.
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if str(file).startswith(('http:/', 'https:/')): # download
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url = str(file).replace(':/', '://') # Pathlib turns :// -> :/
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file = name.split('?')[0] # parse authentication https://url.com/file.txt?auth...
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if Path(file).is_file():
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LOGGER.info(f'Found {url} locally at {file}') # file already exists
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else:
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safe_download(file=file, url=url, min_bytes=1E5)
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return file
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# GitHub assets
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assets = [f'yolov5{size}{suffix}.pt' for size in 'nsmlx' for suffix in ('', '6', '-cls', '-seg')] # default
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try:
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tag, assets = github_assets(repo, release)
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except Exception:
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try:
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tag, assets = github_assets(repo) # latest release
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except Exception:
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try:
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tag = subprocess.check_output('git tag', shell=True, stderr=subprocess.STDOUT).decode().split()[-1]
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except Exception:
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tag = release
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file.parent.mkdir(parents=True, exist_ok=True) # make parent dir (if required)
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if name in assets:
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url3 = 'https://drive.google.com/drive/folders/1EFQTEUeXWSFww0luse2jB9M1QNZQGwNl' # backup gdrive mirror
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safe_download(
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file,
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url=f'https://github.com/{repo}/releases/download/{tag}/{name}',
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min_bytes=1E5,
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error_msg=f'{file} missing, try downloading from https://github.com/{repo}/releases/{tag} or {url3}')
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return str(file)
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