"""
Cobbler DownloadManager
Copyright 2018, Jorgen Maas <jorgen.maas@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
"""
import logging
import requests
[docs]class DownloadManager:
def __init__(self, collection_mgr):
"""
Constructor
:param collection_mgr: This is the current collection manager instance which holds the settings.
"""
self.collection_mgr = collection_mgr
self.settings = collection_mgr.settings()
self.logger = logging.getLogger()
self.cert = ()
if self.settings.proxy_url_ext:
# requests wants a dict like: protocol: proxy_uri
self.proxies = self.settings.proxy_url_ext
else:
self.proxies = {}
[docs] def urlread(self, url, proxies=None, cert=None):
"""
Read the content of a given URL and pass the requests. Response object to the caller.
:param url: The URL the request.
:param proxies: Override the default Cobbler proxies.
:param cert: Override the default Cobbler certs.
:returns: The Python ``requests.Response`` object.
"""
if proxies is None:
proxies = self.proxies
if cert is None:
cert = self.cert
return requests.get(url, proxies=proxies, cert=cert)
[docs] def download_file(self, url, dst, proxies=None, cert=None):
"""
Donwload a file from a URL and save it to any disc location.
:param url: The URL the request.
:param dst: The destination file path.
:param proxies: Override the default Cobbler proxies.
:param cert: Override the default Cobbler certs.
"""
if proxies is None:
proxies = self.proxies
if cert is None:
cert = self.cert
response = requests.get(url, stream=True, proxies=proxies, cert=cert)
with open(dst, "wb") as handle:
for chunk in response.iter_content(chunk_size=512):
# filter out keep-alive new chunks
if chunk:
handle.write(chunk)