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# Copyright (c) 2013 OpenStack Foundation
#
# 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.
# This stuff can't live in test/unit/__init__.py due to its swob dependency.
from copy import deepcopy
from hashlib import md5
from swift.common import swob
from swift.common.utils import split_path
from swift.common.request_helpers import is_sys_meta
class FakeSwift(object):
"""
A good-enough fake Swift proxy server to use in testing middleware.
"""
def __init__(self, s3_acl=False):
self._calls = []
self.req_method_paths = []
self.swift_sources = []
self.uploaded = {}
# mapping of (method, path) --> (response class, headers, body)
self._responses = {}
self.s3_acl = s3_acl
def _fake_auth_middleware(self, env):
if 'swift.authorize_override' in env:
return
if 'HTTP_AUTHORIZATION' not in env:
return
_, authorization = env['HTTP_AUTHORIZATION'].split(' ')
tenant_user, sign = authorization.rsplit(':', 1)
tenant, user = tenant_user.rsplit(':', 1)
path = env['PATH_INFO']
env['PATH_INFO'] = path.replace(tenant_user, 'AUTH_' + tenant)
env['REMOTE_USER'] = 'authorized'
if env['REQUEST_METHOD'] == 'TEST':
# AccessDenied by default at s3acl authenticate
env['swift.authorize'] = \
lambda req: swob.HTTPForbidden(request=req)
else:
env['swift.authorize'] = lambda req: None
def __call__(self, env, start_response):
if self.s3_acl:
self._fake_auth_middleware(env)
req = swob.Request(env)
method = env['REQUEST_METHOD']
path = env['PATH_INFO']
_, acc, cont, obj = split_path(env['PATH_INFO'], 0, 4,
rest_with_last=True)
if env.get('QUERY_STRING'):
path += '?' + env['QUERY_STRING']
if 'swift.authorize' in env:
resp = env['swift.authorize'](req)
if resp:
return resp(env, start_response)
headers = req.headers
self._calls.append((method, path, headers))
self.swift_sources.append(env.get('swift.source'))
try:
resp_class, raw_headers, body = self._responses[(method, path)]
headers = swob.HeaderKeyDict(raw_headers)
except KeyError:
# FIXME: suppress print state error for python3 compatibility.
# pylint: disable-msg=E1601
if (env.get('QUERY_STRING')
and (method, env['PATH_INFO']) in self._responses):
resp_class, raw_headers, body = self._responses[
(method, env['PATH_INFO'])]
headers = swob.HeaderKeyDict(raw_headers)
elif method == 'HEAD' and ('GET', path) in self._responses:
resp_class, raw_headers, _ = self._responses[('GET', path)]
body = None
headers = swob.HeaderKeyDict(raw_headers)
elif method == 'GET' and obj and path in self.uploaded:
resp_class = swob.HTTPOk
headers, body = self.uploaded[path]
else:
print("Didn't find %r in allowed responses" %
((method, path),))
raise
# simulate object PUT
if method == 'PUT' and obj:
input = env['wsgi.input'].read()
etag = md5(input).hexdigest()
headers.setdefault('Etag', etag)
headers.setdefault('Content-Length', len(input))
# keep it for subsequent GET requests later
self.uploaded[path] = (deepcopy(headers), input)
if "CONTENT_TYPE" in env:
self.uploaded[path][0]['Content-Type'] = env["CONTENT_TYPE"]
# range requests ought to work, but copies are special
support_range_and_conditional = not (
method == 'PUT' and
'X-Copy-From' in req.headers and
'Range' in req.headers)
resp = resp_class(req=req, headers=headers, body=body,
conditional_response=support_range_and_conditional)
return resp(env, start_response)
@property
def calls(self):
return [(method, path) for method, path, headers in self._calls]
@property
def calls_with_headers(self):
return self._calls
@property
def call_count(self):
return len(self._calls)
def register(self, method, path, response_class, headers, body):
# assuming the path format like /v1/account/container/object
resource_map = ['account', 'container', 'object']
acos = filter(None, split_path(path, 0, 4, True)[1:])
index = len(acos) - 1
resource = resource_map[index]
if (method, path) in self._responses:
old_headers = self._responses[(method, path)][1]
headers = headers.copy()
for key, value in old_headers.iteritems():
if is_sys_meta(resource, key) and key not in headers:
# keep old sysmeta for s3acl
headers.update({key: value})
self._responses[(method, path)] = (response_class, headers, body)
def register_unconditionally(self, method, path, response_class, headers,
body):
# register() keeps old sysmeta around, but
# register_unconditionally() keeps nothing.
self._responses[(method, path)] = (response_class, headers, body)
def clear_calls(self):
del self._calls[:]
class UnreadableInput(object):
# Some clients will send neither a Content-Length nor a Transfer-Encoding
# header, which will cause (some versions of?) eventlet to bomb out on
# reads. This class helps us simulate that behavior.
def __init__(self, test_case):
self.calls = 0
self.test_case = test_case
def read(self, *a, **kw):
self.calls += 1
# Calling wsgi.input.read with neither a Content-Length nor
# a Transfer-Encoding header will raise TypeError (See
# https://bugs.launchpad.net/swift3/+bug/1593870 in detail)
# This unreadable class emulates the behavior
raise TypeError
def __enter__(self):
return self
def __exit__(self, *args):
self.test_case.assertEqual(0, self.calls)
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