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# Copyright 2014 Rackspace Australia
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import hmac
from hashlib import sha1
import logging
from time import time
import os
import random
import six
import string
import urlparse
class Swift(object):
log = logging.getLogger("zuul.lib.swift")
def __init__(self, config):
self.config = config
self.connection = False
if self.config.has_option('swift', 'X-Account-Meta-Temp-Url-Key'):
self.secure_key = self.config.get('swift',
'X-Account-Meta-Temp-Url-Key')
else:
self.secure_key = ''.join(
random.choice(string.ascii_uppercase + string.digits)
for x in range(20)
)
self.storage_url = ''
if self.config.has_option('swift', 'X-Storage-Url'):
self.storage_url = self.config.get('swift', 'X-Storage-Url')
try:
if self.config.has_section('swift'):
if (not self.config.has_option('swift', 'Send-Temp-Url-Key')
or self.config.getboolean('swift',
'Send-Temp-Url-Key')):
self.connect()
# Tell swift of our key
headers = {}
headers['X-Account-Meta-Temp-Url-Key'] = self.secure_key
self.connection.post_account(headers)
if not self.config.has_option('swift', 'X-Storage-Url'):
self.connect()
self.storage_url = self.connection.get_auth()[0]
except Exception as e:
self.log.warning("Unable to set up swift. Signed storage URL is "
"likely to be wrong. %s" % e)
def connect(self):
if not self.connection:
authurl = self.config.get('swift', 'authurl')
user = (self.config.get('swift', 'user')
if self.config.has_option('swift', 'user') else None)
key = (self.config.get('swift', 'key')
if self.config.has_option('swift', 'key') else None)
retries = (self.config.get('swift', 'retries')
if self.config.has_option('swift', 'retries') else 5)
preauthurl = (self.config.get('swift', 'preauthurl')
if self.config.has_option('swift', 'preauthurl')
else None)
preauthtoken = (self.config.get('swift', 'preauthtoken')
if self.config.has_option('swift', 'preauthtoken')
else None)
snet = (self.config.get('swift', 'snet')
if self.config.has_option('swift', 'snet') else False)
starting_backoff = (self.config.get('swift', 'starting_backoff')
if self.config.has_option('swift',
'starting_backoff')
else 1)
max_backoff = (self.config.get('swift', 'max_backoff')
if self.config.has_option('swift', 'max_backoff')
else 64)
tenant_name = (self.config.get('swift', 'tenant_name')
if self.config.has_option('swift', 'tenant_name')
else None)
auth_version = (self.config.get('swift', 'auth_version')
if self.config.has_option('swift', 'auth_version')
else 2.0)
cacert = (self.config.get('swift', 'cacert')
if self.config.has_option('swift', 'cacert') else None)
insecure = (self.config.get('swift', 'insecure')
if self.config.has_option('swift', 'insecure')
else False)
ssl_compression = (self.config.get('swift', 'ssl_compression')
if self.config.has_option('swift',
'ssl_compression')
else True)
available_os_options = ['tenant_id', 'auth_token', 'service_type',
'endpoint_type', 'tenant_name',
'object_storage_url', 'region_name']
os_options = {}
for os_option in available_os_options:
if self.config.has_option('swift', os_option):
os_options[os_option] = self.config.get('swift', os_option)
import swiftclient
self.connection = swiftclient.client.Connection(
authurl=authurl, user=user, key=key, retries=retries,
preauthurl=preauthurl, preauthtoken=preauthtoken, snet=snet,
starting_backoff=starting_backoff, max_backoff=max_backoff,
tenant_name=tenant_name, os_options=os_options,
auth_version=auth_version, cacert=cacert, insecure=insecure,
ssl_compression=ssl_compression)
def generate_form_post_middleware_params(self, destination_prefix='',
**kwargs):
"""Generate the FormPost middleware params for the given settings"""
# Define the available settings and their defaults
settings = {
'container': '',
'expiry': 7200,
'max_file_size': 104857600,
'max_file_count': 10,
'file_path_prefix': ''
}
for key, default in six.iteritems(settings):
# TODO(jeblair): Remove the following two lines after a
# deprecation period for the underscore variants of the
# settings in YAML.
if key in kwargs:
settings[key] = kwargs[key]
# Since we prefer '-' rather than '_' in YAML, look up
# keys there using hyphens. Continue to use underscores
# everywhere else.
altkey = key.replace('_', '-')
if altkey in kwargs:
settings[key] = kwargs[altkey]
elif self.config.has_option('swift', 'default_' + key):
settings[key] = self.config.get('swift', 'default_' + key)
expires = int(time() + settings['expiry'])
redirect = ''
url = os.path.join(self.storage_url, settings['container'],
settings['file_path_prefix'],
destination_prefix)
u = urlparse.urlparse(url)
hmac_body = '%s\n%s\n%s\n%s\n%s' % (u.path, redirect,
settings['max_file_size'],
settings['max_file_count'],
expires)
signature = hmac.new(self.secure_key, hmac_body, sha1).hexdigest()
return url, hmac_body, signature
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