From a8a27b2b8bac2995c3edd20518680366eb543ac9 Mon Sep 17 00:00:00 2001 From: Will Hunt Date: Thu, 5 Aug 2021 13:22:14 +0100 Subject: [PATCH] Only return an appservice protocol if it has a service providing it. (#10532) If there are no services providing a protocol, omit it completely instead of returning an empty dictionary. This fixes a long-standing spec compliance bug. --- changelog.d/10532.bugfix | 1 + synapse/handlers/appservice.py | 7 +- tests/handlers/test_appservice.py | 122 +++++++++++++++++++++++++++++- 3 files changed, 125 insertions(+), 5 deletions(-) create mode 100644 changelog.d/10532.bugfix diff --git a/changelog.d/10532.bugfix b/changelog.d/10532.bugfix new file mode 100644 index 000000000..d95e3d9b5 --- /dev/null +++ b/changelog.d/10532.bugfix @@ -0,0 +1 @@ +Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py index 21a17cd2e..4ab404665 100644 --- a/synapse/handlers/appservice.py +++ b/synapse/handlers/appservice.py @@ -392,9 +392,6 @@ class ApplicationServicesHandler: protocols[p].append(info) def _merge_instances(infos: List[JsonDict]) -> JsonDict: - if not infos: - return {} - # Merge the 'instances' lists of multiple results, but just take # the other fields from the first as they ought to be identical # copy the result so as not to corrupt the cached one @@ -406,7 +403,9 @@ class ApplicationServicesHandler: return combined - return {p: _merge_instances(protocols[p]) for p in protocols.keys()} + return { + p: _merge_instances(protocols[p]) for p in protocols.keys() if protocols[p] + } async def _get_services_for_event( self, event: EventBase diff --git a/tests/handlers/test_appservice.py b/tests/handlers/test_appservice.py index 024c5e963..43998020b 100644 --- a/tests/handlers/test_appservice.py +++ b/tests/handlers/test_appservice.py @@ -133,11 +133,131 @@ class AppServiceHandlerTestCase(unittest.TestCase): self.assertEquals(result.room_id, room_id) self.assertEquals(result.servers, servers) - def _mkservice(self, is_interested): + def test_get_3pe_protocols_no_appservices(self): + self.mock_store.get_app_services.return_value = [] + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols("my-protocol")) + ) + self.mock_as_api.get_3pe_protocol.assert_not_called() + self.assertEquals(response, {}) + + def test_get_3pe_protocols_no_protocols(self): + service = self._mkservice(False, []) + self.mock_store.get_app_services.return_value = [service] + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols()) + ) + self.mock_as_api.get_3pe_protocol.assert_not_called() + self.assertEquals(response, {}) + + def test_get_3pe_protocols_protocol_no_response(self): + service = self._mkservice(False, ["my-protocol"]) + self.mock_store.get_app_services.return_value = [service] + self.mock_as_api.get_3pe_protocol.return_value = make_awaitable(None) + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols()) + ) + self.mock_as_api.get_3pe_protocol.assert_called_once_with( + service, "my-protocol" + ) + self.assertEquals(response, {}) + + def test_get_3pe_protocols_select_one_protocol(self): + service = self._mkservice(False, ["my-protocol"]) + self.mock_store.get_app_services.return_value = [service] + self.mock_as_api.get_3pe_protocol.return_value = make_awaitable( + {"x-protocol-data": 42, "instances": []} + ) + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols("my-protocol")) + ) + self.mock_as_api.get_3pe_protocol.assert_called_once_with( + service, "my-protocol" + ) + self.assertEquals( + response, {"my-protocol": {"x-protocol-data": 42, "instances": []}} + ) + + def test_get_3pe_protocols_one_protocol(self): + service = self._mkservice(False, ["my-protocol"]) + self.mock_store.get_app_services.return_value = [service] + self.mock_as_api.get_3pe_protocol.return_value = make_awaitable( + {"x-protocol-data": 42, "instances": []} + ) + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols()) + ) + self.mock_as_api.get_3pe_protocol.assert_called_once_with( + service, "my-protocol" + ) + self.assertEquals( + response, {"my-protocol": {"x-protocol-data": 42, "instances": []}} + ) + + def test_get_3pe_protocols_multiple_protocol(self): + service_one = self._mkservice(False, ["my-protocol"]) + service_two = self._mkservice(False, ["other-protocol"]) + self.mock_store.get_app_services.return_value = [service_one, service_two] + self.mock_as_api.get_3pe_protocol.return_value = make_awaitable( + {"x-protocol-data": 42, "instances": []} + ) + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols()) + ) + self.mock_as_api.get_3pe_protocol.assert_called() + self.assertEquals( + response, + { + "my-protocol": {"x-protocol-data": 42, "instances": []}, + "other-protocol": {"x-protocol-data": 42, "instances": []}, + }, + ) + + def test_get_3pe_protocols_multiple_info(self): + service_one = self._mkservice(False, ["my-protocol"]) + service_two = self._mkservice(False, ["my-protocol"]) + + async def get_3pe_protocol(service, unusedProtocol): + if service == service_one: + return { + "x-protocol-data": 42, + "instances": [{"desc": "Alice's service"}], + } + if service == service_two: + return { + "x-protocol-data": 36, + "x-not-used": 45, + "instances": [{"desc": "Bob's service"}], + } + raise Exception("Unexpected service") + + self.mock_store.get_app_services.return_value = [service_one, service_two] + self.mock_as_api.get_3pe_protocol = get_3pe_protocol + response = self.successResultOf( + defer.ensureDeferred(self.handler.get_3pe_protocols()) + ) + # It's expected that the second service's data doesn't appear in the response + self.assertEquals( + response, + { + "my-protocol": { + "x-protocol-data": 42, + "instances": [ + { + "desc": "Alice's service", + }, + {"desc": "Bob's service"}, + ], + }, + }, + ) + + def _mkservice(self, is_interested, protocols=None): service = Mock() service.is_interested.return_value = make_awaitable(is_interested) service.token = "mock_service_token" service.url = "mock_service_url" + service.protocols = protocols return service def _mkservice_alias(self, is_interested_in_alias):