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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 test.unit import FakeLogger, FakeRing
class FakeSwift(object):
"""
A good-enough fake Swift proxy server to use in testing middleware.
"""
def __init__(self):
self._calls = []
self.req_method_paths = []
self.swift_sources = []
self.uploaded = {}
# mapping of (method, path) --> (response class, headers, body)
self._responses = {}
self.logger = FakeLogger('fake-swift')
self.account_ring = FakeRing()
self.container_ring = FakeRing()
self.get_object_ring = lambda policy_index: FakeRing()
def _get_response(self, method, path):
resp = self._responses[(method, path)]
if isinstance(resp, list):
try:
resp = resp.pop(0)
except IndexError:
raise IndexError("Didn't find any more %r "
"in allowed responses" % (
(method, path),))
return resp
def __call__(self, env, start_response):
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']()
if resp:
return resp(env, start_response)
req_headers = swob.Request(env).headers
self.swift_sources.append(env.get('swift.source'))
try:
resp_class, raw_headers, body = self._get_response(method, path)
headers = swob.HeaderKeyDict(raw_headers)
except KeyError:
if (env.get('QUERY_STRING')
and (method, env['PATH_INFO']) in self._responses):
resp_class, raw_headers, body = self._get_response(
method, env['PATH_INFO'])
headers = swob.HeaderKeyDict(raw_headers)
elif method == 'HEAD' and ('GET', path) in self._responses:
resp_class, raw_headers, body = self._get_response('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:
raise KeyError("Didn't find %r in allowed responses" % (
(method, path),))
self._calls.append((method, path, req_headers))
# 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, hence conditional_response=True
req = swob.Request(env)
resp = resp_class(req=req, headers=headers, body=body,
conditional_response=True)
return resp(env, start_response)
@property
def calls(self):
return [(method, path) for method, path, headers in self._calls]
@property
def headers(self):
return [headers 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=''):
self._responses[(method, path)] = (response_class, headers, body)
def register_responses(self, method, path, responses):
self._responses[(method, path)] = list(responses)
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