def download(url, filename, hash=None):
"""
Downloads `url` to `filename`, a tempfile.
"""
global download_url
global download_file
download_url = url
download_file = _friendly(filename)
filename = _path(filename)
if hash is not None:
if _check_hash(filename, hash):
return
progress_time = time.time()
try:
response = requests.get(url, stream=True)
response.raise_for_status()
total_size = int(response.headers.get('content-length', 1))
downloaded = 0
with open(filename, "wb") as f:
for i in response.iter_content(65536):
f.write(i)
downloaded += len(i)
if time.time() - progress_time > 0.1:
progress_time = time.time()
if not quiet:
interface.processing(
_("Downloading [installer.download_file]..."),
complete=downloaded,
total=total_size)
except requests.HTTPError as e:
if not quiet:
raise
interface.error(
_("Could not download [installer.download_file] from [installer.download_url]:\n{b}[installer.download_error]"
))
if hash is not None:
if not quiet:
raise Exception("Hash check failed.")
if not _check_hash(filename, hash):
interface.error(
_("The downloaded file [installer.download_file] from [installer.download_url] is not correct."
))
def unpack(archive, destination):
"""
Unpacks `archive` to `destination`. `archive` should be the name of
a zip or (perhaps compressed) tar file. `destination` should be a
directory that the contents are unpacked into.
"""
global unpack_archive
unpack_archive = _friendly(archive)
if not quiet:
interface.processing(_("Unpacking [installer.unpack_archive]..."))
archive = _path(archive)
destination = _path(destination)
if not os.path.exists(destination):
os.makedirs(destination)
old_cwd = os.getcwd()
try:
os.chdir(destination)
if tarfile.is_tarfile(archive):
tar = tarfile.open(archive)
tar.extractall(".")
tar.close()
elif zipfile.is_zipfile(archive):
zip = _FixedZipFile(archive)
zip.extractall(".")
zip.close()
else:
raise Exception("Unknown file type.")
finally:
os.chdir(old_cwd)
def processing(message, **kwargs):
"""
Displays `message` to the user, without waiting.
"""
interface.processing(message, **kwargs)