diff --git a/synapse/rest/media/v1/preview_url_resource.py b/synapse/rest/media/v1/preview_url_resource.py
index e12f65a206..cd8c246594 100644
--- a/synapse/rest/media/v1/preview_url_resource.py
+++ b/synapse/rest/media/v1/preview_url_resource.py
@@ -27,9 +27,7 @@ from typing import Dict, Optional
from urllib import parse as urlparse
import attr
-from canonicaljson import json
-from twisted.internet import defer
from twisted.internet.error import DNSLookupError
from synapse.api.errors import Codes, SynapseError
@@ -43,6 +41,7 @@ from synapse.http.servlet import parse_integer, parse_string
from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.rest.media.v1._base import get_filename_from_headers
+from synapse.util import json_encoder
from synapse.util.async_helpers import ObservableDeferred
from synapse.util.caches.expiringcache import ExpiringCache
from synapse.util.stringutils import random_string
@@ -228,7 +227,7 @@ class PreviewUrlResource(DirectServeJsonResource):
else:
logger.info("Returning cached response")
- og = await make_deferred_yieldable(defer.maybeDeferred(observable.observe))
+ og = await make_deferred_yieldable(observable.observe())
respond_with_json_bytes(request, 200, og, send_cors=True)
async def _do_preview(self, url: str, user: str, ts: int) -> bytes:
@@ -355,7 +354,7 @@ class PreviewUrlResource(DirectServeJsonResource):
logger.debug("Calculated OG for %s as %s", url, og)
- jsonog = json.dumps(og)
+ jsonog = json_encoder.encode(og)
# store OG in history-aware DB cache
await self.store.store_url_cache(
@@ -586,7 +585,7 @@ class PreviewUrlResource(DirectServeJsonResource):
logger.debug("Running url preview cache expiry")
- if not (await self.store.db.updates.has_completed_background_updates()):
+ if not (await self.store.db_pool.updates.has_completed_background_updates()):
logger.info("Still running DB updates; skipping expiry")
return
|
