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-rw-r--r--synapse/rest/admin/__init__.py6
-rw-r--r--synapse/rest/admin/federation.py135
2 files changed, 141 insertions, 0 deletions
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index c51a029bf3..c499afd4be 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -40,6 +40,10 @@ from synapse.rest.admin.event_reports import (
     EventReportDetailRestServlet,
     EventReportsRestServlet,
 )
+from synapse.rest.admin.federation import (
+    DestinationsRestServlet,
+    ListDestinationsRestServlet,
+)
 from synapse.rest.admin.groups import DeleteGroupAdminRestServlet
 from synapse.rest.admin.media import ListMediaInRoom, register_servlets_for_media_repo
 from synapse.rest.admin.registration_tokens import (
@@ -261,6 +265,8 @@ def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
     ListRegistrationTokensRestServlet(hs).register(http_server)
     NewRegistrationTokenRestServlet(hs).register(http_server)
     RegistrationTokenRestServlet(hs).register(http_server)
+    DestinationsRestServlet(hs).register(http_server)
+    ListDestinationsRestServlet(hs).register(http_server)
 
     # Some servlets only get registered for the main process.
     if hs.config.worker.worker_app is None:
diff --git a/synapse/rest/admin/federation.py b/synapse/rest/admin/federation.py
new file mode 100644
index 0000000000..744687be35
--- /dev/null
+++ b/synapse/rest/admin/federation.py
@@ -0,0 +1,135 @@
+# Copyright 2021 The Matrix.org Foundation C.I.C.
+#
+# 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 logging
+from http import HTTPStatus
+from typing import TYPE_CHECKING, Tuple
+
+from synapse.api.errors import Codes, NotFoundError, SynapseError
+from synapse.http.servlet import RestServlet, parse_integer, parse_string
+from synapse.http.site import SynapseRequest
+from synapse.rest.admin._base import admin_patterns, assert_requester_is_admin
+from synapse.storage.databases.main.transactions import DestinationSortOrder
+from synapse.types import JsonDict
+
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
+logger = logging.getLogger(__name__)
+
+
+class ListDestinationsRestServlet(RestServlet):
+    """Get request to list all destinations.
+    This needs user to have administrator access in Synapse.
+
+    GET /_synapse/admin/v1/federation/destinations?from=0&limit=10
+
+    returns:
+        200 OK with list of destinations if success otherwise an error.
+
+    The parameters `from` and `limit` are required only for pagination.
+    By default, a `limit` of 100 is used.
+    The parameter `destination` can be used to filter by destination.
+    The parameter `order_by` can be used to order the result.
+    """
+
+    PATTERNS = admin_patterns("/federation/destinations$")
+
+    def __init__(self, hs: "HomeServer"):
+        self._auth = hs.get_auth()
+        self._store = hs.get_datastore()
+
+    async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
+        await assert_requester_is_admin(self._auth, request)
+
+        start = parse_integer(request, "from", default=0)
+        limit = parse_integer(request, "limit", default=100)
+
+        if start < 0:
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST,
+                "Query parameter from must be a string representing a positive integer.",
+                errcode=Codes.INVALID_PARAM,
+            )
+
+        if limit < 0:
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST,
+                "Query parameter limit must be a string representing a positive integer.",
+                errcode=Codes.INVALID_PARAM,
+            )
+
+        destination = parse_string(request, "destination")
+
+        order_by = parse_string(
+            request,
+            "order_by",
+            default=DestinationSortOrder.DESTINATION.value,
+            allowed_values=[dest.value for dest in DestinationSortOrder],
+        )
+
+        direction = parse_string(request, "dir", default="f", allowed_values=("f", "b"))
+
+        destinations, total = await self._store.get_destinations_paginate(
+            start, limit, destination, order_by, direction
+        )
+        response = {"destinations": destinations, "total": total}
+        if (start + limit) < total:
+            response["next_token"] = str(start + len(destinations))
+
+        return HTTPStatus.OK, response
+
+
+class DestinationsRestServlet(RestServlet):
+    """Get details of a destination.
+    This needs user to have administrator access in Synapse.
+
+    GET /_synapse/admin/v1/federation/destinations/<destination>
+
+    returns:
+        200 OK with details of a destination if success otherwise an error.
+    """
+
+    PATTERNS = admin_patterns("/federation/destinations/(?P<destination>[^/]+)$")
+
+    def __init__(self, hs: "HomeServer"):
+        self._auth = hs.get_auth()
+        self._store = hs.get_datastore()
+
+    async def on_GET(
+        self, request: SynapseRequest, destination: str
+    ) -> Tuple[int, JsonDict]:
+        await assert_requester_is_admin(self._auth, request)
+
+        destination_retry_timings = await self._store.get_destination_retry_timings(
+            destination
+        )
+
+        if not destination_retry_timings:
+            raise NotFoundError("Unknown destination")
+
+        last_successful_stream_ordering = (
+            await self._store.get_destination_last_successful_stream_ordering(
+                destination
+            )
+        )
+
+        response = {
+            "destination": destination,
+            "failure_ts": destination_retry_timings.failure_ts,
+            "retry_last_ts": destination_retry_timings.retry_last_ts,
+            "retry_interval": destination_retry_timings.retry_interval,
+            "last_successful_stream_ordering": last_successful_stream_ordering,
+        }
+
+        return HTTPStatus.OK, response