def verify(self, path: Path, *, with_sig: bool = False) -> None:
"""
Raises:
MissingFileError - path or associated sha256path doesn't exist
IntegrityError - paths exists with bad hash
"""
hash_path = integrity.path_append_hash_suffix(path)
common.vprint("[verify] {}".format(path))
integrity.verify(path, hash_path)
if with_sig:
sig_path = signature.path_append_sig_suffix(path)
self.sig_verify(path, sig_path)
def download_verify(self,
dest_url: str,
dest_path: Path,
*,
cached: bool = True,
assume_ok: bool = False,
with_sig: bool = False) -> None:
hash_path = integrity.path_append_hash_suffix(dest_path)
sig_path = signature.path_append_sig_suffix(dest_path)
if cached:
if (assume_ok and dest_path.is_file() and hash_path.is_file()
and (not with_sig or sig_path.is_file())):
common.vvprint("[assuming OK] {}".format(dest_path))
return
try:
integrity.verify(dest_path, hash_path)
if with_sig:
self.sig_verify(dest_path, sig_path)
common.vprint("[cached file] {}".format(dest_path))
return
except (error.MissingFileError, error.IntegrityError):
pass
common.vprint("[downloading] {}".format(dest_path))
# Download the (small) hash and signature files first.
hash_url = integrity.append_hash_suffix(dest_url)
self.download(hash_url, hash_path)
if with_sig:
sig_url = signature.append_sig_suffix(dest_url)
self.download(sig_url, sig_path)
# If dest_path exists and has the correct hash, bypass the downloading
# step to save download time.
download_required = True
if dest_path.is_file():
try:
integrity.verify(dest_path, hash_path)
download_required = False
except (error.MissingFileError, error.IntegrityError):
pass
if download_required:
self.download(dest_url, dest_path)
integrity.verify(dest_path, hash_path)
if with_sig:
self.sig_verify(dest_path, sig_path)