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# Copyright (C) 2011 Linaro Limited
#
# Author: Michael Hudson-Doyle <michael.hudson@linaro.org>
#
# This file is part of lava-tool.
#
# lava-tool is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation
#
# lava-tool 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 Lesser General Public License
# along with lava-tool. If not, see <http://www.gnu.org/licenses/>.
import base64
import errno
import ConfigParser as configparser
import urllib
import urllib2
import os
import xmlrpclib
from lava_tool.interface import LavaCommandError
DEFAULT_KEYRING_FILE = "%s/.local/share/lava-tool/keyring.cfg" % (
os.path.expanduser("~"))
class TokenDeleteError(Exception):
""" Raise when token cannot be deleted. """
def normalize_xmlrpc_url(uri):
if '://' not in uri:
uri = 'http://' + uri
if not uri.endswith('/'):
uri += '/'
if not uri.endswith('/RPC2/'):
uri += 'RPC2/'
return uri
class AuthBackend(object):
def add_token(self, username, endpoint_url, token):
raise NotImplementedError
def get_token_for_endpoint(self, user, endpoint_url):
raise NotImplementedError
class KeyringAuthBackend(AuthBackend):
def __init__(self, config_file=None):
if not config_file:
config_file = DEFAULT_KEYRING_FILE
self.config_file = config_file
self.config = configparser.RawConfigParser()
try:
os.makedirs(os.path.dirname(self.config_file))
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
self.config.read(self.config_file)
def add_token(self, username, endpoint_url, token):
# update the keyring with the token
if not self.config.has_section(endpoint_url):
self.config.add_section(endpoint_url)
self.config.set(endpoint_url, username, token)
# save the config back to the file
with open(self.config_file, 'w') as config_file:
self.config.write(config_file)
def get_token_for_endpoint(self, username, endpoint_url):
# fetch the token
try:
token = self.config.get(endpoint_url, username)
except (configparser.NoOptionError, configparser.NoSectionError):
token = None
return token
def remove_token(self, username, endpoint_url):
try:
if not self.config.remove_option(endpoint_url, username):
raise TokenDeleteError("Username not found")
if not self.config.items(endpoint_url):
self.config.remove_section(endpoint_url)
except configparser.NoSectionError:
raise TokenDeleteError("Endpoint URL not found")
with open(self.config_file, 'w') as config_file:
self.config.write(config_file)
def get_all_tokens_uri(self, endpoint_url):
items = []
try:
items = self.config.items(endpoint_url)
except configparser.NoSectionError:
pass
return [item[0] for item in items]
def get_all_tokens(self):
items = {}
for section in self.config.sections():
if section not in items.keys():
items[section] = [item[0] for item in
self.config.items(section)]
return items
class MemoryAuthBackend(AuthBackend):
def __init__(self, user_endpoint_token_list):
self._tokens = {}
for user, endpoint, token in user_endpoint_token_list:
self._tokens[(user, endpoint)] = token
def add_token(self, username, endpoint_url, token):
self._tokens[(username, endpoint_url)] = token
def get_token_for_endpoint(self, username, endpoint_url):
return self._tokens.get((username, endpoint_url))
class XMLRPCTransport(xmlrpclib.Transport):
def __init__(self, scheme, auth_backend):
xmlrpclib.Transport.__init__(self)
self._scheme = scheme
self.auth_backend = auth_backend
self._opener = urllib2.build_opener()
self.verbose = 0
def request(self, host, handler, request_body, verbose=0):
self.verbose = verbose
request = self.build_http_request(host, handler, request_body)
try:
response = self._opener.open(request)
except urllib2.HTTPError as e:
raise xmlrpclib.ProtocolError(
host + handler, e.code, e.msg, e.info())
return self.parse_response(response)
def build_http_request(self, host, handler, request_body):
token = None
user = None
auth, host = urllib.splituser(host)
if auth:
user, token = urllib.splitpasswd(auth)
url = self._scheme + "://" + host + handler
if user is not None and token is None:
token = self.auth_backend.get_token_for_endpoint(user, url)
if token is None:
raise LavaCommandError(
"Username provided but no token found.")
request = urllib2.Request(url, request_body)
request.add_header("Content-Type", "text/xml")
if token:
auth = base64.b64encode(urllib.unquote(user + ':' + token))
request.add_header("Authorization", "Basic " + auth)
return request
class AuthenticatingServerProxy(xmlrpclib.ServerProxy):
def __init__(self, uri, transport=None, encoding=None, verbose=0,
allow_none=0, use_datetime=0, auth_backend=None):
uri = normalize_xmlrpc_url(uri)
if transport is None:
scheme = urllib.splittype(uri)[0]
transport = XMLRPCTransport(scheme, auth_backend=auth_backend)
xmlrpclib.ServerProxy.__init__(
self, uri, transport, encoding, verbose, allow_none, use_datetime)
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