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#
# Copyright (c) 2016 ThoughtWorks, Inc.
#
# Pixelated 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.
#
# Pixelated 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 Pixelated. If not, see <http://www.gnu.org/licenses/>.
import os
from xml.sax import SAXParseException
from pixelated.authentication import Authenticator
from pixelated.config.leap import BootstrapUserServices
from pixelated.resources import BaseResource, UnAuthorizedResource, IPixelatedSession
from pixelated.resources import handle_error_deferred
from twisted.internet import defer
from twisted.logger import Logger
from twisted.python.filepath import FilePath
from twisted.web import util
from twisted.web.http import UNAUTHORIZED, OK
from twisted.web.resource import NoResource
from twisted.web.server import NOT_DONE_YET
from twisted.web.static import File
from twisted.web.template import Element, XMLFile, renderElement, renderer
log = Logger()
def _get_startup_folder():
path = os.path.dirname(os.path.abspath(__file__))
return os.path.join(path, '..', 'assets')
def _get_static_folder():
static_folder = os.path.abspath(os.path.join(os.path.abspath(__file__), "..", "..", "..", "web-ui", "dist"))
# this is a workaround for packaging
if not os.path.exists(static_folder):
static_folder = os.path.abspath(
os.path.join(os.path.abspath(__file__), "..", "..", "..", "..", "web-ui", "dist"))
if not os.path.exists(static_folder):
static_folder = os.path.join('/', 'usr', 'share', 'pixelated-user-agent')
return static_folder
def parse_accept_language(all_headers):
accepted_languages = ['pt-BR', 'en-US']
languages = all_headers.get('accept-language', '').split(';')[0]
for language in accepted_languages:
if language in languages:
return language
return 'pt-BR'
class DisclaimerElement(Element):
loader = XMLFile(FilePath(os.path.join(_get_startup_folder(), '_login_disclaimer_banner.html')))
def __init__(self, banner):
super(DisclaimerElement, self).__init__()
self._set_loader(banner)
self._banner_filename = banner or "_login_disclaimer_banner.html"
def _set_loader(self, banner):
if banner:
current_path = os.path.dirname(os.path.abspath(__file__))
banner_file_path = os.path.join(current_path, "..", "..", "..", banner)
self.loader = XMLFile(FilePath(banner_file_path))
def render(self, request):
try:
return super(DisclaimerElement, self).render(request)
except SAXParseException:
return ["Invalid XML template format for %s." % self._banner_filename]
except IOError:
return ["Disclaimer banner file %s could not be read or does not exit." % self._banner_filename]
class LoginWebSite(Element):
loader = XMLFile(FilePath(os.path.join(_get_startup_folder(), 'login.html')))
def __init__(self, error_msg=None, disclaimer_banner_file=None):
super(LoginWebSite, self).__init__()
self._error_msg = error_msg
self.disclaimer_banner_file = disclaimer_banner_file
@renderer
def error_msg(self, request, tag):
if self._error_msg is not None:
return tag(self._error_msg)
return tag('')
@renderer
def disclaimer(self, request, tag):
return DisclaimerElement(self.disclaimer_banner_file).render(request)
class LoginResource(BaseResource):
BASE_URL = 'login'
def __init__(self, services_factory, provider=None, disclaimer_banner=None, authenticator=None):
BaseResource.__init__(self, services_factory)
self._static_folder = _get_static_folder()
self._startup_folder = _get_startup_folder()
self._disclaimer_banner = disclaimer_banner
self._provider = provider
self._authenticator = authenticator or Authenticator(provider)
self._bootstrap_user_services = BootstrapUserServices(services_factory, provider)
self.putChild('startup-assets', File(self._startup_folder))
with open(os.path.join(self._startup_folder, 'Interstitial.html')) as f:
self.interstitial = f.read()
def getChild(self, path, request):
if path == '':
return self
if path == 'login':
return self
if not self.is_logged_in(request):
return UnAuthorizedResource()
return NoResource()
def render_GET(self, request):
request.setResponseCode(OK)
return self._render_template(request)
def _render_template(self, request, error_msg=None):
site = LoginWebSite(error_msg=error_msg, disclaimer_banner_file=self._disclaimer_banner)
return renderElement(request, site)
def render_POST(self, request):
if self.is_logged_in(request):
return util.redirectTo("/", request)
def render_response(user_auth):
request.setResponseCode(OK)
request.write(self.interstitial)
request.finish()
self._complete_bootstrap(user_auth, request)
def render_error(error):
log.info('Login error for %s' % request.args['username'][0])
log.info('%s' % error)
request.setResponseCode(UNAUTHORIZED)
return self._render_template(request, 'Invalid username or password')
d = self._handle_login(request)
d.addCallbacks(render_response, render_error)
d.addErrback(handle_error_deferred, request)
return NOT_DONE_YET
@defer.inlineCallbacks
def _handle_login(self, request):
username = request.args['username'][0]
password = request.args['password'][0]
user_auth = yield self._authenticator.authenticate(username, password)
defer.returnValue(user_auth)
def _complete_bootstrap(self, user_auth, request):
def log_error(error):
log.error('Login error during %s services setup: %s \n %s' % (user_auth.username, error.getErrorMessage(), error.getTraceback()))
def set_session_cookies(_):
session = IPixelatedSession(request.getSession())
session.user_uuid = user_auth.uuid
language = parse_accept_language(request.getAllHeaders())
password = request.args['password'][0]
d = self._bootstrap_user_services.setup(user_auth, password, language)
d.addCallback(set_session_cookies)
d.addErrback(log_error)
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