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# Copyright (C) 2014 Codethink Limited
#
# 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; version 2 of the License.
#
# 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 json
import os
import urllib
import urllib2
def setup_proxy(config_filename):
"""Tell urllib2 to use a proxy for http action by lorry-controller.
Load the proxy information from the JSON file given by proxy_def, then
set urllib2's url opener to open urls via an authenticated proxy.
"""
if not os.path.exists(config_filename):
return
with open(config_filename, 'r') as f:
proxy = json.load(f)
# set the required environment variables
hostname = urllib.quote(proxy['hostname'])
user = '%s:%s' % (proxy['username'], proxy['password'])
url = '%s:%s' % (hostname, proxy['port'])
os.environ['http_proxy'] = 'http://%s@%s' % (user, url)
os.environ['https_proxy'] = 'https://%s@%s' % (user, url)
# create a ProxyHandler
proxies = {'http_proxy': 'http://%s@%s' % (user, url),
'https_proxy': 'https://%s@%s' % (user, url)}
proxy_handler = urllib2.ProxyHandler(proxies)
# install an opener to use the proxy
opener = urllib2.build_opener(proxy_handler)
urllib2.install_opener(opener)
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