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# Copyright (c) 2010-2012 OpenStack, LLC.
#
# 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 unittest
from nose import SkipTest
from webob import Request
try:
# this test requires the dnspython package to be installed
import dns.resolver
except ImportError:
skip = True
else: # executed if the try has no errors
skip = False
from swift.common.middleware import cname_lookup
class FakeApp(object):
def __call__(self, env, start_response):
return "FAKE APP"
def start_response(*args):
pass
class TestCNAMELookup(unittest.TestCase):
def setUp(self):
if skip:
raise SkipTest
self.app = cname_lookup.CNAMELookupMiddleware(FakeApp(),
{'lookup_depth': 2})
def test_passthrough(self):
def my_lookup(d):
return 0, d
cname_lookup.lookup_cname = my_lookup
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'foo.example.com'})
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'foo.example.com:8080'})
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
def test_good_lookup(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, '%s.example.com' % d
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com:8080'})
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
def test_lookup_chain_too_long(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
if d == 'mysite.com':
site = 'level1.foo.com'
elif d == 'level1.foo.com':
site = 'level2.foo.com'
elif d == 'level2.foo.com':
site = 'bar.example.com'
return 0, site
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEquals(resp, ['CNAME lookup failed after 2 tries'])
def test_lookup_chain_bad_target(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, 'some.invalid.site.com'
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEquals(resp,
['CNAME lookup failed to resolve to a valid domain'])
def test_something_weird(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, None
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEquals(resp,
['CNAME lookup failed to resolve to a valid domain'])
def test_with_memcache(self):
def my_lookup(d):
return 0, '%s.example.com' % d
cname_lookup.lookup_cname = my_lookup
class memcache_stub(object):
def __init__(self):
self.cache = {}
def get(self, key):
return self.cache.get(key, None)
def set(self, key, value, *a, **kw):
self.cache[key] = value
memcache = memcache_stub()
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET',
'swift.cache': memcache},
headers={'Host': 'mysite.com'})
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET',
'swift.cache': memcache},
headers={'Host': 'mysite.com'})
resp = self.app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
def test_cname_matching_ending_not_domain(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'foo.com'})
def my_lookup(d):
return 0, 'c.aexample.com'
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEquals(resp,
['CNAME lookup failed to resolve to a valid domain'])
def test_cname_configured_with_empty_storage_domain(self):
app = cname_lookup.CNAMELookupMiddleware(FakeApp(),
{'storage_domain': '',
'lookup_depth': 2})
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'c.a.example.com'})
def my_lookup(d):
return 0, None
cname_lookup.lookup_cname = my_lookup
resp = app(req.environ, start_response)
self.assertEquals(resp, 'FAKE APP')
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