openstack/swift
Code Issues Proposed changes

Add more doc and test for cors_expose_headers option

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In follow-up to the related change, mention the new
cors_expose_headers option (and other proxy-server.conf
options) in the CORS doc.

Add a test for the cors options being loaded into the
proxy server.

Improve CORS comments in docs.

Change-Id: I647d8f9e9cbd98de05443638628414b1e87d1a76
Related-Change: I5ca90a052f27c98a514a96ee2299bfa1b6d46334
This commit is contained in:
Alistair Coles 2017-03-13 17:12:13 +00:00 committed by Tim Burke
parent 956172623c
commit 904e7c97f1
5 changed files with 73 additions and 18 deletions
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9
doc/manpages/proxy-server.conf.5
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@ -142,11 +142,14 @@ This optional suffix (default is empty) that would be appended to the swift tran
id allows one to easily figure out from which cluster that X-Trans-Id belongs to.
This is very useful when one is managing more than one swift cluster.
.IP \fBcors_allow_origin\fR
Use a comma separated list of full URL (http://foo.bar:1234,https://foo.bar)
List of origin hosts that are allowed for CORS requests in addition to what
the container has set. Use a comma separated list of full URL (http://foo.bar:1234,https://foo.bar)
.IP \fBstrict_cors_mode\fR
The default is true.
If True (default) then CORS requests are only allowed if their Origin header
matches an allowed origin. Otherwise, any Origin is allowed.
.IP \fBcors_expose_headers\fR
Comma separated list of headers to expose through Access-Control-Expose-Headers
Comma separated list of headers to expose through Access-Control-Expose-Headers,
in addition to the defaults and any headers set in container metadata.
.IP \fBnice_priority\fR
Modify scheduling priority of server processes. Niceness values range from -20
(most favorable to the process) to 19 (least favorable to the process).

7
doc/source/cors.rst
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@ -28,6 +28,11 @@ The supported headers are,
| | Space separated. |
+------------------------------------------------+------------------------------+
In addition the the values set in container metadata, some cluster-wide values
may also be configured using the ``strict_cors_mode``, ``cors_allow_origin``
and ``cors_expose_headers`` in ``proxy-server.conf``. See
``proxy-server.conf-sample`` for more information.
Before a browser issues an actual request it may issue a `preflight request`_.
The preflight request is an OPTIONS call to verify the Origin is allowed to
make the request. The sequence of events are,
@ -48,6 +53,8 @@ returns the following values for this header,
* all metadata headers (``X-Container-Meta-*`` for containers and
``X-Object-Meta-*`` for objects)
* headers listed in ``X-Container-Meta-Access-Control-Expose-Headers``
* headers configured using the ``cors_expose_headers`` option in
``proxy-server.conf``
.. note::
An OPTIONS request to a symlink object will respond with the options for

14
doc/source/deployment_guide.rst
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@ -1765,14 +1765,14 @@ cert_file Path to the ssl
key_file Path to the ssl .key. This
should be enabled for testing
purposes only.
cors_allow_origin This is a list of hosts that
are included with any CORS
request by default and
returned with the
Access-Control-Allow-Origin
header in addition to what
cors_allow_origin List of origin hosts that are allowed
for CORS requests in addition to what
the container has set.
strict_cors_mode True
strict_cors_mode True If True (default) then CORS
requests are only allowed if their
Origin header matches an allowed
origin. Otherwise, any Origin is
allowed.
cors_expose_headers This is a list of headers that
are included in the header
Access-Control-Expose-Headers

9
etc/proxy-server.conf-sample
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@ -70,11 +70,18 @@ bind_port = 8080
# log_statsd_sample_rate_factor = 1.0
# log_statsd_metric_prefix =
#
# List of origin hosts that are allowed for CORS requests in addition to what
# the container has set.
# Use a comma separated list of full URL (http://foo.bar:1234,https://foo.bar)
# cors_allow_origin =
# If True (default) then CORS requests are only allowed if their Origin header
# matches an allowed origin. Otherwise, any Origin is allowed.
# strict_cors_mode = True
#
# Comma separated list of headers to expose through Access-Control-Expose-Headers
# Comma separated list of headers to expose through Access-Control-Expose-Headers,
# in addition to the defaults and any headers set in container metadata (see
# CORS documentation).
# cors_expose_headers =
#
# client_timeout = 60

52
test/unit/proxy/test_server.py
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@ -562,18 +562,48 @@ class TestController(unittest.TestCase):
@patch_policies([StoragePolicy(0, 'zero', True, object_ring=FakeRing())])
class TestProxyServer(unittest.TestCase):
def test_creation(self):
# later config should be extended to assert more config options
app = proxy_server.Application({'node_timeout': '3.5',
'recoverable_node_timeout': '1.5'},
FakeMemcache(),
class TestProxyServerConfiguration(unittest.TestCase):
def _make_app(self, conf):
# helper function to instantiate a proxy server instance
return proxy_server.Application(conf, FakeMemcache(),
container_ring=FakeRing(),
account_ring=FakeRing())
def test_node_timeout(self):
# later config should be extended to assert more config options
app = self._make_app({'node_timeout': '3.5',
'recoverable_node_timeout': '1.5'})
self.assertEqual(app.node_timeout, 3.5)
self.assertEqual(app.recoverable_node_timeout, 1.5)
def test_cors_options(self):
# check defaults
app = self._make_app({})
self.assertFalse(app.cors_allow_origin)
self.assertFalse(app.cors_expose_headers)
self.assertTrue(app.strict_cors_mode)
# check custom configs
app = self._make_app({
'cors_allow_origin': '',
'cors_expose_headers': '',
'strict_cors_mode': 'True'})
self.assertTrue(app.strict_cors_mode)
app = self._make_app({
'cors_allow_origin': ' http://X.com,http://Y.com ,, http://Z.com',
'cors_expose_headers': ' custom1,,, custom2,custom3,,',
'strict_cors_mode': 'False'})
self.assertEqual({'http://X.com', 'http://Y.com', 'http://Z.com'},
set(app.cors_allow_origin))
self.assertEqual({'custom1', 'custom2', 'custom3'},
set(app.cors_expose_headers))
self.assertFalse(app.strict_cors_mode)
@patch_policies([StoragePolicy(0, 'zero', True, object_ring=FakeRing())])
class TestProxyServer(unittest.TestCase):
def test_get_object_ring(self):
baseapp = proxy_server.Application({},
FakeMemcache(),
@ -5280,6 +5310,14 @@ class TestReplicatedObjectController(
self.assertNotIn('access-control-expose-headers', resp.headers)
self.assertNotIn('access-control-allow-origin', resp.headers)
# test proxy server cors_allow_origin option
self.app.cors_allow_origin = ['http://foo.bar']
resp = self._get_CORS_response(
container_cors=container_cors, strict_mode=True)
self.assertEqual('http://foo.bar',
resp.headers['access-control-allow-origin'])
self.assertEqual(expected_exposed, exposed)
def test_CORS_valid_with_obj_headers(self):
container_cors = {'allow_origin': 'http://foo.bar'}