Add an admin APIs to allow server admins to list users' pushers (#8610)

Add an admin API `GET /_synapse/admin/v1/users/<user_id>/pushers` like https://matrix.org/docs/spec/client_server/latest#get-matrix-client-r0-pushers

changelog.d/8610.feature

@@ -0,0 +1 @@
+Add an admin APIs to allow server admins to list users' pushers. Contributed by @dklimpel.

docs/admin_api/user_admin_api.rst

@@ -611,3 +611,82 @@ The following parameters should be set in the URL:
 
 - ``user_id`` - fully qualified: for example, ``@user:server.com``.
 - ``device_id`` - The device to delete.
+
+List all pushers
+================
+Gets information about all pushers for a specific ``user_id``.
+
+The API is::
+
+  GET /_synapse/admin/v1/users/<user_id>/pushers
+
+To use it, you will need to authenticate by providing an ``access_token`` for a
+server admin: see `README.rst <README.rst>`_.
+
+A response body like the following is returned:
+
+.. code:: json
+
+    {
+      "pushers": [
+        {
+          "app_display_name":"HTTP Push Notifications",
+          "app_id":"m.http",
+          "data": {
+            "url":"example.com"
+          },
+          "device_display_name":"pushy push",
+          "kind":"http",
+          "lang":"None",
+          "profile_tag":"",
+          "pushkey":"a@example.com"
+        }
+      ],
+      "total": 1
+    }
+
+**Parameters**
+
+The following parameters should be set in the URL:
+
+- ``user_id`` - fully qualified: for example, ``@user:server.com``.
+
+**Response**
+
+The following fields are returned in the JSON response body:
+
+- ``pushers`` - An array containing the current pushers for the user
+
+  - ``app_display_name`` - string - A string that will allow the user to identify
+    what application owns this pusher.
+
+  - ``app_id`` - string - This is a reverse-DNS style identifier for the application.
+    Max length, 64 chars.
+
+  - ``data`` - A dictionary of information for the pusher implementation itself.
+
+    - ``url`` - string - Required if ``kind`` is ``http``. The URL to use to send
+      notifications to.
+
+    - ``format`` - string - The format to use when sending notifications to the
+      Push Gateway.
+
+  - ``device_display_name`` - string -  A string that will allow the user to identify
+    what device owns this pusher.
+
+  - ``profile_tag`` - string - This string determines which set of device specific rules
+    this pusher executes.
+
+  - ``kind`` - string -  The kind of pusher. "http" is a pusher that sends HTTP pokes.
+  - ``lang`` - string - The preferred language for receiving notifications
+    (e.g. 'en' or 'en-US')
+
+  - ``profile_tag`` - string - This string determines which set of device specific rules
+    this pusher executes.
+
+  - ``pushkey`` - string - This is a unique identifier for this pusher.
+    Max length, 512 bytes.
+
+- ``total`` - integer - Number of pushers.
+
+See also `Client-Server API Spec <https://matrix.org/docs/spec/client_server/latest#get-matrix-client-r0-pushers>`_

synapse/rest/admin/__init__.py

@@ -50,6 +50,7 @@ from synapse.rest.admin.server_notice_servlet import SendServerNoticeServlet
 from synapse.rest.admin.users import (
     AccountValidityRenewServlet,
     DeactivateAccountRestServlet,
+    PushersRestServlet,
     ResetPasswordRestServlet,
     SearchUsersRestServlet,
     UserAdminServlet,
@@ -226,8 +227,9 @@ def register_servlets(hs, http_server):
     DeviceRestServlet(hs).register(http_server)
     DevicesRestServlet(hs).register(http_server)
     DeleteDevicesRestServlet(hs).register(http_server)
-    EventReportsRestServlet(hs).register(http_server)
     EventReportDetailRestServlet(hs).register(http_server)
+    EventReportsRestServlet(hs).register(http_server)
+    PushersRestServlet(hs).register(http_server)
 
 
 def register_servlets_for_client_rest_resource(hs, http_server):

synapse/rest/admin/users.py

@@ -39,6 +39,17 @@ from synapse.types import JsonDict, UserID
 
 logger = logging.getLogger(__name__)
 
+_GET_PUSHERS_ALLOWED_KEYS = {
+    "app_display_name",
+    "app_id",
+    "data",
+    "device_display_name",
+    "kind",
+    "lang",
+    "profile_tag",
+    "pushkey",
+}
+
 
 class UsersRestServlet(RestServlet):
     PATTERNS = historical_admin_path_patterns("/users/(?P<user_id>[^/]*)$")
@@ -713,6 +724,47 @@ class UserMembershipRestServlet(RestServlet):
         return 200, ret
 
 
+class PushersRestServlet(RestServlet):
+    """
+    Gets information about all pushers for a specific `user_id`.
+
+    Example:
+        http://localhost:8008/_synapse/admin/v1/users/
+        @user:server/pushers
+
+    Returns:
+        pushers: Dictionary containing pushers information.
+        total: Number of pushers in dictonary `pushers`.
+    """
+
+    PATTERNS = admin_patterns("/users/(?P<user_id>[^/]*)/pushers$")
+
+    def __init__(self, hs):
+        self.is_mine = hs.is_mine
+        self.store = hs.get_datastore()
+        self.auth = hs.get_auth()
+
+    async def on_GET(
+        self, request: SynapseRequest, user_id: str
+    ) -> Tuple[int, JsonDict]:
+        await assert_requester_is_admin(self.auth, request)
+
+        if not self.is_mine(UserID.from_string(user_id)):
+            raise SynapseError(400, "Can only lookup local users")
+
+        if not await self.store.get_user_by_id(user_id):
+            raise NotFoundError("User not found")
+
+        pushers = await self.store.get_pushers_by_user_id(user_id)
+
+        filtered_pushers = [
+            {k: v for k, v in p.items() if k in _GET_PUSHERS_ALLOWED_KEYS}
+            for p in pushers
+        ]
+
+        return 200, {"pushers": filtered_pushers, "total": len(filtered_pushers)}
+
+
 class UserMediaRestServlet(RestServlet):
     """
     Gets information about all uploaded local media for a specific `user_id`.

tests/rest/admin/test_user.py

@@ -1118,6 +1118,130 @@ class UserMembershipRestTestCase(unittest.HomeserverTestCase):
         self.assertEqual(number_rooms, len(channel.json_body["joined_rooms"]))
 
 
+class PushersRestTestCase(unittest.HomeserverTestCase):
+
+    servlets = [
+        synapse.rest.admin.register_servlets,
+        login.register_servlets,
+    ]
+
+    def prepare(self, reactor, clock, hs):
+        self.store = hs.get_datastore()
+
+        self.admin_user = self.register_user("admin", "pass", admin=True)
+        self.admin_user_tok = self.login("admin", "pass")
+
+        self.other_user = self.register_user("user", "pass")
+        self.url = "/_synapse/admin/v1/users/%s/pushers" % urllib.parse.quote(
+            self.other_user
+        )
+
+    def test_no_auth(self):
+        """
+        Try to list pushers of an user without authentication.
+        """
+        request, channel = self.make_request("GET", self.url, b"{}")
+        self.render(request)
+
+        self.assertEqual(401, int(channel.result["code"]), msg=channel.result["body"])
+        self.assertEqual(Codes.MISSING_TOKEN, channel.json_body["errcode"])
+
+    def test_requester_is_no_admin(self):
+        """
+        If the user is not a server admin, an error is returned.
+        """
+        other_user_token = self.login("user", "pass")
+
+        request, channel = self.make_request(
+            "GET", self.url, access_token=other_user_token,
+        )
+        self.render(request)
+
+        self.assertEqual(403, int(channel.result["code"]), msg=channel.result["body"])
+        self.assertEqual(Codes.FORBIDDEN, channel.json_body["errcode"])
+
+    def test_user_does_not_exist(self):
+        """
+        Tests that a lookup for a user that does not exist returns a 404
+        """
+        url = "/_synapse/admin/v1/users/@unknown_person:test/pushers"
+        request, channel = self.make_request(
+            "GET", url, access_token=self.admin_user_tok,
+        )
+        self.render(request)
+
+        self.assertEqual(404, channel.code, msg=channel.json_body)
+        self.assertEqual(Codes.NOT_FOUND, channel.json_body["errcode"])
+
+    def test_user_is_not_local(self):
+        """
+        Tests that a lookup for a user that is not a local returns a 400
+        """
+        url = "/_synapse/admin/v1/users/@unknown_person:unknown_domain/pushers"
+
+        request, channel = self.make_request(
+            "GET", url, access_token=self.admin_user_tok,
+        )
+        self.render(request)
+
+        self.assertEqual(400, channel.code, msg=channel.json_body)
+        self.assertEqual("Can only lookup local users", channel.json_body["error"])
+
+    def test_get_pushers(self):
+        """
+        Tests that a normal lookup for pushers is successfully
+        """
+
+        # Get pushers
+        request, channel = self.make_request(
+            "GET", self.url, access_token=self.admin_user_tok,
+        )
+        self.render(request)
+
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(0, channel.json_body["total"])
+
+        # Register the pusher
+        other_user_token = self.login("user", "pass")
+        user_tuple = self.get_success(
+            self.store.get_user_by_access_token(other_user_token)
+        )
+        token_id = user_tuple["token_id"]
+
+        self.get_success(
+            self.hs.get_pusherpool().add_pusher(
+                user_id=self.other_user,
+                access_token=token_id,
+                kind="http",
+                app_id="m.http",
+                app_display_name="HTTP Push Notifications",
+                device_display_name="pushy push",
+                pushkey="a@example.com",
+                lang=None,
+                data={"url": "example.com"},
+            )
+        )
+
+        # Get pushers
+        request, channel = self.make_request(
+            "GET", self.url, access_token=self.admin_user_tok,
+        )
+        self.render(request)
+
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(1, channel.json_body["total"])
+
+        for p in channel.json_body["pushers"]:
+            self.assertIn("pushkey", p)
+            self.assertIn("kind", p)
+            self.assertIn("app_id", p)
+            self.assertIn("app_display_name", p)
+            self.assertIn("device_display_name", p)
+            self.assertIn("profile_tag", p)
+            self.assertIn("lang", p)
+            self.assertIn("url", p["data"])
+
+
 class UserMediaRestTestCase(unittest.HomeserverTestCase):
 
     servlets = [