text stringlengths 1 93.6k |
|---|
resume_download=False,
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user_agent=None,
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local_files_only=False,
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):
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if cache_dir is None:
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cache_dir = TRANSFORMERS_CACHE
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if isinstance(cache_dir, Path):
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cache_dir = str(cache_dir)
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os.makedirs(cache_dir, exist_ok=True)
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etag = None
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if not local_files_only:
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try:
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response = requests.head(url, allow_redirects=True, proxies=proxies, timeout=etag_timeout)
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if response.status_code == 200:
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etag = response.headers.get("ETag")
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except (EnvironmentError, requests.exceptions.Timeout):
|
# etag is already None
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pass
|
filename = url_to_filename(url, etag)
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# get cache path to put the file
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cache_path = os.path.join(cache_dir, filename)
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# etag is None = we don't have a connection, or url doesn't exist, or is otherwise inaccessible.
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# try to get the last downloaded one
|
if etag is None:
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if os.path.exists(cache_path):
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return cache_path
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else:
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matching_files = [
|
file
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for file in fnmatch.filter(os.listdir(cache_dir), filename + ".*")
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if not file.endswith(".json") and not file.endswith(".lock")
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]
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if len(matching_files) > 0:
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return os.path.join(cache_dir, matching_files[-1])
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else:
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# If files cannot be found and local_files_only=True,
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# the models might've been found if local_files_only=False
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# Notify the user about that
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if local_files_only:
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raise ValueError(
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"Cannot find the requested files in the cached path and outgoing traffic has been"
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" disabled. To enable model look-ups and downloads online, set 'local_files_only'"
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" to False."
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)
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return None
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# From now on, etag is not None.
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if os.path.exists(cache_path) and not force_download:
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return cache_path
|
# Prevent parallel downloads of the same file with a lock.
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lock_path = cache_path + ".lock"
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with FileLock(lock_path):
|
# If the download just completed while the lock was activated.
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if os.path.exists(cache_path) and not force_download:
|
# Even if returning early like here, the lock will be released.
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return cache_path
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if resume_download:
|
incomplete_path = cache_path + ".incomplete"
|
@contextmanager
|
def _resumable_file_manager():
|
with open(incomplete_path, "a+b") as f:
|
yield f
|
temp_file_manager = _resumable_file_manager
|
if os.path.exists(incomplete_path):
|
resume_size = os.stat(incomplete_path).st_size
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else:
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resume_size = 0
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else:
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temp_file_manager = partial(tempfile.NamedTemporaryFile, dir=cache_dir, delete=False)
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resume_size = 0
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# Download to temporary file, then copy to cache dir once finished.
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# Otherwise you get corrupt cache entries if the download gets interrupted.
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with temp_file_manager() as temp_file:
|
print(
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"%s not found in cache or force_download set to True, downloading to %s",
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url,
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temp_file.name,
|
)
|
http_get(
|
url,
|
temp_file,
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proxies=proxies,
|
resume_size=resume_size,
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user_agent=user_agent,
|
)
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os.replace(temp_file.name, cache_path)
|
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