Source code for openquake.server.utils

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (C) 2015-2020 GEM Foundation
# OpenQuake 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.
# OpenQuake is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with OpenQuake. If not, see <>.

import getpass
import requests
import logging
import django
import numpy

from time import sleep
from django.conf import settings
from openquake.engine import __version__ as oqversion

if settings.LOCKDOWN:
    from django.contrib.auth.models import User

[docs]def is_superuser(request): if settings.LOCKDOWN and hasattr(request, 'user'): if request.user.is_superuser: return True return False
[docs]def get_user(request): """ Returns the users from `request` if authentication is enabled, otherwise returns the default user (from settings, or as reported by the OS). """ if settings.LOCKDOWN and hasattr(request, 'user'): if request.user.is_authenticated: user = request.user.username else: # This may happen with crafted requests user = '' else: user = getattr(settings, 'DEFAULT_USER', getpass.getuser()) return user
[docs]def get_valid_users(request): """" Returns a list of `users` based on groups membership. Returns a list made of a single user when it is not member of any group. """ users = [get_user(request)] if settings.LOCKDOWN and hasattr(request, 'user'): if request.user.is_authenticated: groups = request.user.groups.all() if groups: users = list(User.objects.filter(groups__in=groups) .values_list('username', flat=True)) else: # This may happen with crafted requests users = [] return users
[docs]def get_acl_on(request): """ Returns `True` if ACL should be honorated, returns otherwise `False`. """ acl_on = settings.ACL_ON if is_superuser(request): # ACL is always disabled for superusers acl_on = False return acl_on
[docs]def user_has_permission(request, owner): """ Returns `True` if user coming from the request has the permission to view a resource, returns `false` otherwise. """ return owner in get_valid_users(request) or not get_acl_on(request)
[docs]def oq_server_context_processor(request): """ A custom context processor which allows injection of additional context variables. """ context = {} context['oq_engine_server_url'] = ('//' + request.META.get('HTTP_HOST', 'localhost:8800')) # this context var is also evaluated by the STANDALONE_APPS to identify # the running environment. Keep it as it is context['oq_engine_version'] = oqversion context['server_name'] = settings.SERVER_NAME return context
[docs]def check_webserver_running(url="http://localhost:8800", max_retries=30): """ Returns True if a given URL is responding within a given timeout. """ retry = 0 response = '' success = False while response != and retry < max_retries: try: response = requests.head(url, allow_redirects=True).status_code success = True except Exception: sleep(1) retry += 1 if not success: logging.warning('Unable to connect to %s within %s retries' % (url, max_retries)) return success
[docs]def array_of_strings_to_bytes(arr, key): """ :param arr: array or array-like object :param key: string associated to the error (appear in the error message) If `arr` is a numpy array with dtype object containing strings, convert it into a numpy array containing bytes, unless it has more than 2 dimensions or contains non-strings (these are errors). Return `arr` unchanged in the other cases. """ if arr is None: return () if not isinstance(arr, numpy.ndarray) or arr.dtype != numpy.dtype('O'): return arr if arr.ndim == 1: return numpy.array([s.encode('utf8') for s in arr]) elif arr.ndim == 2: return numpy.array([[col.encode('utf8') for col in row] for row in arr]) else: raise NotImplementedError('The array for %s has shape %s' % (key, arr.shape)) return arr