mirror of
https://gitlab.com/fdroid/fdroidserver.git
synced 2024-11-15 03:20:10 +01:00
68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
#!/usr/bin/env python3
|
|
#
|
|
# net.py - part of the FDroid server tools
|
|
# Copyright (C) 2015 Hans-Christoph Steiner <hans@eds.org>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero General Public License as published by
|
|
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import os
|
|
import requests
|
|
|
|
HEADERS = {'User-Agent': 'F-Droid'}
|
|
|
|
|
|
def download_file(url, local_filename=None, dldir='tmp'):
|
|
filename = url.split('/')[-1]
|
|
if local_filename is None:
|
|
local_filename = os.path.join(dldir, filename)
|
|
# the stream=True parameter keeps memory usage low
|
|
r = requests.get(url, stream=True, allow_redirects=True, headers=HEADERS)
|
|
r.raise_for_status()
|
|
with open(local_filename, 'wb') as f:
|
|
for chunk in r.iter_content(chunk_size=1024):
|
|
if chunk: # filter out keep-alive new chunks
|
|
f.write(chunk)
|
|
f.flush()
|
|
return local_filename
|
|
|
|
|
|
def http_get(url, etag=None, timeout=600):
|
|
"""
|
|
Downloads the content from the given URL by making a GET request.
|
|
|
|
If an ETag is given, it will do a HEAD request first, to see if the content changed.
|
|
|
|
:param url: The URL to download from.
|
|
:param etag: The last ETag to be used for the request (optional).
|
|
:return: A tuple consisting of:
|
|
- The raw content that was downloaded or None if it did not change
|
|
- The new eTag as returned by the HTTP request
|
|
"""
|
|
# TODO disable TLS Session IDs and TLS Session Tickets
|
|
# (plain text cookie visible to anyone who can see the network traffic)
|
|
if etag:
|
|
r = requests.head(url, headers=HEADERS, timeout=timeout)
|
|
r.raise_for_status()
|
|
if 'ETag' in r.headers and etag == r.headers['ETag']:
|
|
return None, etag
|
|
|
|
r = requests.get(url, headers=HEADERS, timeout=timeout)
|
|
r.raise_for_status()
|
|
|
|
new_etag = None
|
|
if 'ETag' in r.headers:
|
|
new_etag = r.headers['ETag']
|
|
|
|
return r.content, new_etag
|