+
−from logilab.common.testlib import TestCase, unittest_main, tag, Tags
+
−
+
−from cubicweb.web import StatusResponse
+
−from cubicweb.devtools.fake import FakeRequest
+
−
+
−
+
−def _test_cache(hin, hout, method='GET'):
+
−    """forge and process a request
+
−
+
−    return status code and the request object
+
−
+
−    status is None is no cache is involved
+
−    """
+
−    # forge request
+
−    req = FakeRequest(method=method)
+
−    for key, value in hin:
+
−        req._headers_in.addRawHeader(key, str(value))
+
−    for key, value in hout:
+
−        req.headers_out.addRawHeader(key, str(value))
+
−    # process
+
−    status = None
+
−    try:
+
−        req.validate_cache()
+
−    except StatusResponse as ex:
+
−        status = ex.status
+
−    return status, req
+
−
+
−class HTTPCache(TestCase):
+
−    """Check that the http cache logiac work as expected
+
−    (as far as we understood the RFC)
+
−
+
−    """
+
−    tags = TestCase.tags | Tags('http', 'cache')
+
−
+
−
+
−    def assertCache(self, expected, status, situation=''):
+
−        """simple assert for nicer message"""
+
−        if expected != status:
+
−            if expected is None:
+
−                expected = "MODIFIED"
+
−            if status is None:
+
−                status = "MODIFIED"
+
−            msg = 'expected %r got %r' % (expected, status)
+
−            if situation:
+
−                msg = "%s - when: %s" % (msg, situation)
+
−            self.fail(msg)
+
−
+
−    def test_IN_none_OUT_none(self):
+
−        #: test that no caching is requested when not data is available
+
−        #: on any side
+
−        status, req =_test_cache((),())
+
−        self.assertIsNone(status)
+
−
+
−    def test_IN_Some_OUT_none(self):
+
−        #: test that no caching is requested when no data is available
+
−        #: server (origin) side
+
−        hin = [('if-modified-since','Sat, 14 Apr 2012 14:39:32 GM'),
+
−              ]
+
−        status, req = _test_cache(hin, ())
+
−        self.assertIsNone(status)
+
−        hin = [('if-none-match','babar/huitre'),
+
−              ]
+
−        status, req = _test_cache(hin, ())
+
−        self.assertIsNone(status)
+
−        hin = [('if-modified-since','Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ('if-none-match','babar/huitre'),
+
−              ]
+
−        status, req = _test_cache(hin, ())
+
−        self.assertIsNone(status)
+
−
+
−    def test_IN_none_OUT_Some(self):
+
−        #: test that no caching is requested when no data is provided
+
−        #: by the client
+
−        hout = [('last-modified','Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache((), hout)
+
−        self.assertIsNone(status)
+
−        hout = [('etag','babar/huitre'),
+
−               ]
+
−        status, req = _test_cache((), hout)
+
−        self.assertIsNone(status)
+
−        hout = [('last-modified', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−                ('etag','babar/huitre'),
+
−               ]
+
−        status, req = _test_cache((), hout)
+
−        self.assertIsNone(status)
+
−
+
−    @tag('last_modified')
+
−    def test_last_modified_newer(self):
+
−        #: test the proper behavior of modification date only
+
−        # newer
+
−        hin  = [('if-modified-since', 'Sat, 13 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('last-modified', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'origin is newer than client')
+
−
+
−    @tag('last_modified')
+
−    def test_last_modified_older(self):
+
−        # older
+
−        hin  = [('if-modified-since', 'Sat, 15 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('last-modified', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'origin is older than client')
+
−
+
−    @tag('last_modified')
+
−    def test_last_modified_same(self):
+
−        # same
+
−        hin  = [('if-modified-since', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('last-modified', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'origin is equal to client')
+
−
+
−    @tag('etag')
+
−    def test_etag_mismatch(self):
+
−        #: test the proper behavior of etag only
+
−        # etag mismatch
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'celestine'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'etag mismatch')
+
−
+
−    @tag('etag')
+
−    def test_etag_match(self):
+
−        # etag match
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'etag match')
+
−        # etag match in multiple
+
−        hin  = [('if-none-match', 'loutre'),
+
−                ('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'etag match in multiple')
+
−        # client use "*" as etag
+
−        hin  = [('if-none-match', '*'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'client use "*" as etag')
+
−
+
−    @tag('etag', 'last_modified')
+
−    def test_both(self):
+
−        #: test the proper behavior of etag only
+
−        # both wrong
+
−        hin  = [('if-none-match', 'babar'),
+
−                ('if-modified-since', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('etag', 'loutre'),
+
−                ('last-modified', 'Sat, 15 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'both wrong')
+
−
+
−    @tag('etag', 'last_modified')
+
−    def test_both_etag_mismatch(self):
+
−        # both etag mismatch
+
−        hin  = [('if-none-match', 'babar'),
+
−                ('if-modified-since', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('etag', 'loutre'),
+
−                ('last-modified', 'Sat, 13 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'both  but etag mismatch')
+
−
+
−    @tag('etag', 'last_modified')
+
−    def test_both_but_modified(self):
+
−        # both but modified
+
−        hin  = [('if-none-match', 'babar'),
+
−                ('if-modified-since', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−                ('last-modified', 'Sat, 15 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'both  but modified')
+
−
+
−    @tag('etag', 'last_modified')
+
−    def test_both_ok(self):
+
−        # both ok
+
−        hin  = [('if-none-match', 'babar'),
+
−                ('if-modified-since', 'Sat, 14 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−                ('last-modified', 'Sat, 13 Apr 2012 14:39:32 GM'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'both ok')
+
−
+
−    @tag('etag', 'HEAD')
+
−    def test_head_verb(self):
+
−        #: check than FOUND 200 is properly raise without content on HEAD request
+
−        #: This logic does not really belong here :-/
+
−        # modified
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'rhino/really-not-babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout, method='HEAD')
+
−        self.assertCache(200, status, 'modifier HEAD verb')
+
−        # not modified
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout, method='HEAD')
+
−        self.assertCache(304, status, 'not modifier HEAD verb')
+
−
+
−    @tag('etag', 'POST')
+
−    def test_post_verb(self):
+
−        # modified
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'rhino/really-not-babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout, method='POST')
+
−        self.assertCache(None, status, 'modifier HEAD verb')
+
−        # not modified
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout, method='POST')
+
−        self.assertCache(412, status, 'not modifier HEAD verb')
+
−
+
−    @tag('expires')
+
−    def test_expires_added(self):
+
−        #: Check that Expires header is added:
+
−        #: - when the page is modified
+
−        #: - when none was already present
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'rhino/really-not-babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'modifier HEAD verb')
+
−        value = req.headers_out.getHeader('expires')
+
−        self.assertIsNotNone(value)
+
−
+
−    @tag('expires')
+
−    def test_expires_not_added(self):
+
−        #: Check that Expires header is not added if NOT-MODIFIED
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        hout = [('etag', 'babar'),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(304, status, 'not modifier HEAD verb')
+
−        value = req.headers_out.getHeader('expires')
+
−        self.assertIsNone(value)
+
−
+
−    @tag('expires')
+
−    def test_expires_no_overwrite(self):
+
−        #: Check that cache does not overwrite existing Expires header
+
−        hin  = [('if-none-match', 'babar'),
+
−               ]
+
−        DATE = 'Sat, 13 Apr 2012 14:39:32 GM'
+
−        hout = [('etag', 'rhino/really-not-babar'),
+
−                ('expires', DATE),
+
−               ]
+
−        status, req = _test_cache(hin, hout)
+
−        self.assertCache(None, status, 'not modifier HEAD verb')
+
−        value = req.headers_out.getRawHeaders('expires')
+
−        self.assertEqual(value, [DATE])
+
−
+
−
+
−if __name__ == '__main__':
+
−    unittest_main()