/usr/lib/python3/dist-packages/rosdistro/loader.py is in python3-rosdistro 0.6.6-1.
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#
# Copyright (c) 2013, Open Source Robotics Foundation, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Open Source Robotics Foundation, Inc. nor
# the names of its contributors may be used to endorse or promote
# products derived from this software without specific prior
# written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import socket
import time
try:
from urllib.request import urlopen
from urllib.error import HTTPError
from urllib.error import URLError
except ImportError:
from urllib2 import urlopen
from urllib2 import HTTPError
from urllib2 import URLError
def load_url(url, retry=2, retry_period=1, timeout=10, skip_decode=False):
try:
fh = urlopen(url, timeout=timeout)
except HTTPError as e:
if e.code in [500, 502, 503] and retry:
time.sleep(retry_period)
return load_url(url, retry=retry - 1, retry_period=retry_period, timeout=timeout)
e.msg += ' (%s)' % url
raise
except URLError as e:
if isinstance(e.reason, socket.timeout) and retry:
time.sleep(retry_period)
return load_url(url, retry=retry - 1, retry_period=retry_period, timeout=timeout)
raise URLError(str(e) + ' (%s)' % url)
except socket.timeout as e:
raise socket.timeout(str(e) + ' (%s)' % url)
# Python 2/3 Compatibility
contents = fh.read()
if isinstance(contents, str) or skip_decode:
return contents
else:
return contents.decode('utf-8')
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