diff --git a/changelog.d/8106.bugfix b/changelog.d/8106.bugfix
new file mode 100644
index 0000000000..c46c60448f
--- /dev/null
+++ b/changelog.d/8106.bugfix
@@ -0,0 +1 @@
+Fix a long-standing bug where invalid JSON would be accepted by Synapse.
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index 6e40630ab6..a3f314118a 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -21,10 +21,10 @@ import typing
from http import HTTPStatus
from typing import Dict, List, Optional, Union
-from canonicaljson import json
-
from twisted.web import http
+from synapse.util import json_decoder
+
if typing.TYPE_CHECKING:
from synapse.types import JsonDict
@@ -593,7 +593,7 @@ class HttpResponseException(CodeMessageException):
# try to parse the body as json, to get better errcode/msg, but
# default to M_UNKNOWN with the HTTP status as the error text
try:
- j = json.loads(self.response.decode("utf-8"))
+ j = json_decoder.decode(self.response.decode("utf-8"))
except ValueError:
j = {}
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 11c5d63298..630f571cd4 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -28,7 +28,6 @@ from typing import (
Union,
)
-from canonicaljson import json
from prometheus_client import Counter, Histogram
from twisted.internet import defer
@@ -63,7 +62,7 @@ from synapse.replication.http.federation import (
ReplicationGetQueryRestServlet,
)
from synapse.types import JsonDict, get_domain_from_id
-from synapse.util import glob_to_regex, unwrapFirstError
+from synapse.util import glob_to_regex, json_decoder, unwrapFirstError
from synapse.util.async_helpers import Linearizer, concurrently_execute
from synapse.util.caches.response_cache import ResponseCache
@@ -551,7 +550,7 @@ class FederationServer(FederationBase):
for device_id, keys in device_keys.items():
for key_id, json_str in keys.items():
json_result.setdefault(user_id, {})[device_id] = {
- key_id: json.loads(json_str)
+ key_id: json_decoder.decode(json_str)
}
logger.info(
diff --git a/synapse/federation/sender/transaction_manager.py b/synapse/federation/sender/transaction_manager.py
index c7f6cb3d73..9bd534a313 100644
--- a/synapse/federation/sender/transaction_manager.py
+++ b/synapse/federation/sender/transaction_manager.py
@@ -15,8 +15,6 @@
import logging
from typing import TYPE_CHECKING, List, Tuple
-from canonicaljson import json
-
from synapse.api.errors import HttpResponseException
from synapse.events import EventBase
from synapse.federation.persistence import TransactionActions
@@ -28,6 +26,7 @@ from synapse.logging.opentracing import (
tags,
whitelisted_homeserver,
)
+from synapse.util import json_decoder
from synapse.util.metrics import measure_func
if TYPE_CHECKING:
@@ -71,7 +70,7 @@ class TransactionManager(object):
for edu in pending_edus:
context = edu.get_context()
if context:
- span_contexts.append(extract_text_map(json.loads(context)))
+ span_contexts.append(extract_text_map(json_decoder.decode(context)))
if keep_destination:
edu.strip_context()
diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py
index 84169c1022..d8def45e38 100644
--- a/synapse/handlers/e2e_keys.py
+++ b/synapse/handlers/e2e_keys.py
@@ -19,7 +19,7 @@ import logging
from typing import Dict, List, Optional, Tuple
import attr
-from canonicaljson import encode_canonical_json, json
+from canonicaljson import encode_canonical_json
from signedjson.key import VerifyKey, decode_verify_key_bytes
from signedjson.sign import SignatureVerifyException, verify_signed_json
from unpaddedbase64 import decode_base64
@@ -35,7 +35,7 @@ from synapse.types import (
get_domain_from_id,
get_verify_key_from_cross_signing_key,
)
-from synapse.util import unwrapFirstError
+from synapse.util import json_decoder, unwrapFirstError
from synapse.util.async_helpers import Linearizer
from synapse.util.caches.expiringcache import ExpiringCache
from synapse.util.retryutils import NotRetryingDestination
@@ -404,7 +404,7 @@ class E2eKeysHandler(object):
for device_id, keys in device_keys.items():
for key_id, json_bytes in keys.items():
json_result.setdefault(user_id, {})[device_id] = {
- key_id: json.loads(json_bytes)
+ key_id: json_decoder.decode(json_bytes)
}
@trace
@@ -1186,7 +1186,7 @@ def _exception_to_failure(e):
def _one_time_keys_match(old_key_json, new_key):
- old_key = json.loads(old_key_json)
+ old_key = json_decoder.decode(old_key_json)
# if either is a string rather than an object, they must match exactly
if not isinstance(old_key, dict) or not isinstance(new_key, dict):
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py
index 92b7404706..0ce6ddfbe4 100644
--- a/synapse/handlers/identity.py
+++ b/synapse/handlers/identity.py
@@ -21,8 +21,6 @@ import logging
import urllib.parse
from typing import Awaitable, Callable, Dict, List, Optional, Tuple
-from canonicaljson import json
-
from twisted.internet.error import TimeoutError
from synapse.api.errors import (
@@ -34,6 +32,7 @@ from synapse.api.errors import (
from synapse.config.emailconfig import ThreepidBehaviour
from synapse.http.client import SimpleHttpClient
from synapse.types import JsonDict, Requester
+from synapse.util import json_decoder
from synapse.util.hash import sha256_and_url_safe_base64
from synapse.util.stringutils import assert_valid_client_secret, random_string
@@ -177,7 +176,7 @@ class IdentityHandler(BaseHandler):
except TimeoutError:
raise SynapseError(500, "Timed out contacting identity server")
except CodeMessageException as e:
- data = json.loads(e.msg) # XXX WAT?
+ data = json_decoder.decode(e.msg) # XXX WAT?
return data
logger.info("Got 404 when POSTing JSON %s, falling back to v1 URL", bind_url)
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index b999d91d1a..c955a86be0 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -17,7 +17,7 @@
import logging
from typing import TYPE_CHECKING, Dict, List, Optional, Tuple
-from canonicaljson import encode_canonical_json, json
+from canonicaljson import encode_canonical_json
from twisted.internet.interfaces import IDelayedCall
@@ -55,6 +55,7 @@ from synapse.types import (
UserID,
create_requester,
)
+from synapse.util import json_decoder
from synapse.util.async_helpers import Linearizer
from synapse.util.frozenutils import frozendict_json_encoder
from synapse.util.metrics import measure_func
@@ -864,7 +865,7 @@ class EventCreationHandler(object):
# Ensure that we can round trip before trying to persist in db
try:
dump = frozendict_json_encoder.encode(event.content)
- json.loads(dump)
+ json_decoder.decode(dump)
except Exception:
logger.exception("Failed to encode content: %r", event.content)
raise
diff --git a/synapse/handlers/oidc_handler.py b/synapse/handlers/oidc_handler.py
index 87d28a7ae9..dd3703cbd2 100644
--- a/synapse/handlers/oidc_handler.py
+++ b/synapse/handlers/oidc_handler.py
@@ -12,7 +12,6 @@
# 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 json
import logging
from typing import TYPE_CHECKING, Dict, Generic, List, Optional, Tuple, TypeVar
from urllib.parse import urlencode
@@ -39,6 +38,7 @@ from synapse.http.server import respond_with_html
from synapse.http.site import SynapseRequest
from synapse.logging.context import make_deferred_yieldable
from synapse.types import UserID, map_username_to_mxid_localpart
+from synapse.util import json_decoder
if TYPE_CHECKING:
from synapse.server import HomeServer
@@ -367,7 +367,7 @@ class OidcHandler:
# and check for an error field. If not, we respond with a generic
# error message.
try:
- resp = json.loads(resp_body.decode("utf-8"))
+ resp = json_decoder.decode(resp_body.decode("utf-8"))
error = resp["error"]
description = resp.get("error_description", error)
except (ValueError, KeyError):
@@ -384,7 +384,7 @@ class OidcHandler:
# Since it is a not a 5xx code, body should be a valid JSON. It will
# raise if not.
- resp = json.loads(resp_body.decode("utf-8"))
+ resp = json_decoder.decode(resp_body.decode("utf-8"))
if "error" in resp:
error = resp["error"]
diff --git a/synapse/handlers/ui_auth/checkers.py b/synapse/handlers/ui_auth/checkers.py
index a011e9fe29..9146dc1a3b 100644
--- a/synapse/handlers/ui_auth/checkers.py
+++ b/synapse/handlers/ui_auth/checkers.py
@@ -16,13 +16,12 @@
import logging
from typing import Any
-from canonicaljson import json
-
from twisted.web.client import PartialDownloadError
from synapse.api.constants import LoginType
from synapse.api.errors import Codes, LoginError, SynapseError
from synapse.config.emailconfig import ThreepidBehaviour
+from synapse.util import json_decoder
logger = logging.getLogger(__name__)
@@ -117,7 +116,7 @@ class RecaptchaAuthChecker(UserInteractiveAuthChecker):
except PartialDownloadError as pde:
# Twisted is silly
data = pde.response
- resp_body = json.loads(data.decode("utf-8"))
+ resp_body = json_decoder.decode(data.decode("utf-8"))
if "success" in resp_body:
# Note that we do NOT check the hostname here: we explicitly
diff --git a/synapse/http/client.py b/synapse/http/client.py
index 8aeb70cdec..dad01a8e56 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -19,7 +19,7 @@ import urllib
from io import BytesIO
import treq
-from canonicaljson import encode_canonical_json, json
+from canonicaljson import encode_canonical_json
from netaddr import IPAddress
from prometheus_client import Counter
from zope.interface import implementer, provider
@@ -47,6 +47,7 @@ from synapse.http import (
from synapse.http.proxyagent import ProxyAgent
from synapse.logging.context import make_deferred_yieldable
from synapse.logging.opentracing import set_tag, start_active_span, tags
+from synapse.util import json_decoder
from synapse.util.async_helpers import timeout_deferred
logger = logging.getLogger(__name__)
@@ -391,7 +392,7 @@ class SimpleHttpClient(object):
body = await make_deferred_yieldable(readBody(response))
if 200 <= response.code < 300:
- return json.loads(body.decode("utf-8"))
+ return json_decoder.decode(body.decode("utf-8"))
else:
raise HttpResponseException(
response.code, response.phrase.decode("ascii", errors="replace"), body
@@ -433,7 +434,7 @@ class SimpleHttpClient(object):
body = await make_deferred_yieldable(readBody(response))
if 200 <= response.code < 300:
- return json.loads(body.decode("utf-8"))
+ return json_decoder.decode(body.decode("utf-8"))
else:
raise HttpResponseException(
response.code, response.phrase.decode("ascii", errors="replace"), body
@@ -463,7 +464,7 @@ class SimpleHttpClient(object):
actual_headers.update(headers)
body = await self.get_raw(uri, args, headers=headers)
- return json.loads(body.decode("utf-8"))
+ return json_decoder.decode(body.decode("utf-8"))
async def put_json(self, uri, json_body, args={}, headers=None):
""" Puts some json to the given URI.
@@ -506,7 +507,7 @@ class SimpleHttpClient(object):
body = await make_deferred_yieldable(readBody(response))
if 200 <= response.code < 300:
- return json.loads(body.decode("utf-8"))
+ return json_decoder.decode(body.decode("utf-8"))
else:
raise HttpResponseException(
response.code, response.phrase.decode("ascii", errors="replace"), body
diff --git a/synapse/http/federation/well_known_resolver.py b/synapse/http/federation/well_known_resolver.py
index 89a3b041ce..f794315deb 100644
--- a/synapse/http/federation/well_known_resolver.py
+++ b/synapse/http/federation/well_known_resolver.py
@@ -13,7 +13,6 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-import json
import logging
import random
import time
@@ -26,7 +25,7 @@ from twisted.web.http import stringToDatetime
from twisted.web.http_headers import Headers
from synapse.logging.context import make_deferred_yieldable
-from synapse.util import Clock
+from synapse.util import Clock, json_decoder
from synapse.util.caches.ttlcache import TTLCache
from synapse.util.metrics import Measure
@@ -181,7 +180,7 @@ class WellKnownResolver(object):
if response.code != 200:
raise Exception("Non-200 response %s" % (response.code,))
- parsed_body = json.loads(body.decode("utf-8"))
+ parsed_body = json_decoder.decode(body.decode("utf-8"))
logger.info("Response from .well-known: %s", parsed_body)
result = parsed_body["m.server"].encode("ascii")
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py
index a34e5ead88..53acba56cb 100644
--- a/synapse/http/servlet.py
+++ b/synapse/http/servlet.py
@@ -17,9 +17,8 @@
import logging
-from canonicaljson import json
-
from synapse.api.errors import Codes, SynapseError
+from synapse.util import json_decoder
logger = logging.getLogger(__name__)
@@ -215,7 +214,7 @@ def parse_json_value_from_request(request, allow_empty_body=False):
return None
try:
- content = json.loads(content_bytes.decode("utf-8"))
+ content = json_decoder.decode(content_bytes.decode("utf-8"))
except Exception as e:
logger.warning("Unable to parse JSON: %s", e)
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
diff --git a/synapse/logging/opentracing.py b/synapse/logging/opentracing.py
index 21dbd9f415..abe532d350 100644
--- a/synapse/logging/opentracing.py
+++ b/synapse/logging/opentracing.py
@@ -177,6 +177,7 @@ from canonicaljson import json
from twisted.internet import defer
from synapse.config import ConfigError
+from synapse.util import json_decoder
if TYPE_CHECKING:
from synapse.http.site import SynapseRequest
@@ -499,7 +500,9 @@ def start_active_span_from_edu(
if opentracing is None:
return _noop_context_manager()
- carrier = json.loads(edu_content.get("context", "{}")).get("opentracing", {})
+ carrier = json_decoder.decode(edu_content.get("context", "{}")).get(
+ "opentracing", {}
+ )
context = opentracing.tracer.extract(opentracing.Format.TEXT_MAP, carrier)
_references = [
opentracing.child_of(span_context_from_string(x))
@@ -699,7 +702,7 @@ def span_context_from_string(carrier):
Returns:
The active span context decoded from a string.
"""
- carrier = json.loads(carrier)
+ carrier = json_decoder.decode(carrier)
return opentracing.tracer.extract(opentracing.Format.TEXT_MAP, carrier)
diff --git a/synapse/replication/tcp/commands.py b/synapse/replication/tcp/commands.py
index d853e4447e..8cd47770c1 100644
--- a/synapse/replication/tcp/commands.py
+++ b/synapse/replication/tcp/commands.py
@@ -21,9 +21,7 @@ import abc
import logging
from typing import Tuple, Type
-from canonicaljson import json
-
-from synapse.util import json_encoder as _json_encoder
+from synapse.util import json_decoder, json_encoder
logger = logging.getLogger(__name__)
@@ -125,7 +123,7 @@ class RdataCommand(Command):
stream_name,
instance_name,
None if token == "batch" else int(token),
- json.loads(row_json),
+ json_decoder.decode(row_json),
)
def to_line(self):
@@ -134,7 +132,7 @@ class RdataCommand(Command):
self.stream_name,
self.instance_name,
str(self.token) if self.token is not None else "batch",
- _json_encoder.encode(self.row),
+ json_encoder.encode(self.row),
)
)
@@ -359,7 +357,7 @@ class UserIpCommand(Command):
def from_line(cls, line):
user_id, jsn = line.split(" ", 1)
- access_token, ip, user_agent, device_id, last_seen = json.loads(jsn)
+ access_token, ip, user_agent, device_id, last_seen = json_decoder.decode(jsn)
return cls(user_id, access_token, ip, user_agent, device_id, last_seen)
@@ -367,7 +365,7 @@ class UserIpCommand(Command):
return (
self.user_id
+ " "
- + _json_encoder.encode(
+ + json_encoder.encode(
(
self.access_token,
self.ip,
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index 2ab30ce897..f216382636 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -21,8 +21,6 @@ import re
from typing import List, Optional
from urllib import parse as urlparse
-from canonicaljson import json
-
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import (
AuthError,
@@ -46,6 +44,7 @@ from synapse.rest.client.v2_alpha._base import client_patterns
from synapse.storage.state import StateFilter
from synapse.streams.config import PaginationConfig
from synapse.types import RoomAlias, RoomID, StreamToken, ThirdPartyInstanceID, UserID
+from synapse.util import json_decoder
MYPY = False
if MYPY:
@@ -519,7 +518,9 @@ class RoomMessageListRestServlet(RestServlet):
filter_str = parse_string(request, b"filter", encoding="utf-8")
if filter_str:
filter_json = urlparse.unquote(filter_str)
- event_filter = Filter(json.loads(filter_json)) # type: Optional[Filter]
+ event_filter = Filter(
+ json_decoder.decode(filter_json)
+ ) # type: Optional[Filter]
if (
event_filter
and event_filter.filter_json.get("event_format", "client")
@@ -631,7 +632,9 @@ class RoomEventContextServlet(RestServlet):
filter_str = parse_string(request, b"filter", encoding="utf-8")
if filter_str:
filter_json = urlparse.unquote(filter_str)
- event_filter = Filter(json.loads(filter_json)) # type: Optional[Filter]
+ event_filter = Filter(
+ json_decoder.decode(filter_json)
+ ) # type: Optional[Filter]
else:
event_filter = None
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index a5c24fbd63..96488b131a 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -16,8 +16,6 @@
import itertools
import logging
-from canonicaljson import json
-
from synapse.api.constants import PresenceState
from synapse.api.errors import Codes, StoreError, SynapseError
from synapse.api.filtering import DEFAULT_FILTER_COLLECTION, FilterCollection
@@ -29,6 +27,7 @@ from synapse.handlers.presence import format_user_presence_state
from synapse.handlers.sync import SyncConfig
from synapse.http.servlet import RestServlet, parse_boolean, parse_integer, parse_string
from synapse.types import StreamToken
+from synapse.util import json_decoder
from ._base import client_patterns, set_timeline_upper_limit
@@ -125,7 +124,7 @@ class SyncRestServlet(RestServlet):
filter_collection = DEFAULT_FILTER_COLLECTION
elif filter_id.startswith("{"):
try:
- filter_object = json.loads(filter_id)
+ filter_object = json_decoder.decode(filter_id)
set_timeline_upper_limit(
filter_object, self.hs.config.filter_timeline_limit
)
diff --git a/synapse/rest/key/v2/remote_key_resource.py b/synapse/rest/key/v2/remote_key_resource.py
index e266204f95..5db7f81c2d 100644
--- a/synapse/rest/key/v2/remote_key_resource.py
+++ b/synapse/rest/key/v2/remote_key_resource.py
@@ -15,19 +15,19 @@
import logging
from typing import Dict, Set
-from canonicaljson import json
from signedjson.sign import sign_json
from synapse.api.errors import Codes, SynapseError
from synapse.crypto.keyring import ServerKeyFetcher
from synapse.http.server import DirectServeJsonResource, respond_with_json
from synapse.http.servlet import parse_integer, parse_json_object_from_request
+from synapse.util import json_decoder
logger = logging.getLogger(__name__)
class RemoteKey(DirectServeJsonResource):
- """HTTP resource for retreiving the TLS certificate and NACL signature
+ """HTTP resource for retrieving the TLS certificate and NACL signature
verification keys for a collection of servers. Checks that the reported
X.509 TLS certificate matches the one used in the HTTPS connection. Checks
that the NACL signature for the remote server is valid. Returns a dict of
@@ -209,13 +209,15 @@ class RemoteKey(DirectServeJsonResource):
# Cast to bytes since postgresql returns a memoryview.
json_results.add(bytes(result["key_json"]))
+ # If there is a cache miss, request the missing keys, then recurse (and
+ # ensure the result is sent).
if cache_misses and query_remote_on_cache_miss:
await self.fetcher.get_keys(cache_misses)
await self.query_keys(request, query, query_remote_on_cache_miss=False)
else:
signed_keys = []
for key_json in json_results:
- key_json = json.loads(key_json.decode("utf-8"))
+ key_json = json_decoder.decode(key_json.decode("utf-8"))
for signing_key in self.config.key_server_signing_keys:
key_json = sign_json(key_json, self.config.server_name, signing_key)
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 6814bf5fcf..ab49d227de 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -19,12 +19,11 @@ import random
from abc import ABCMeta
from typing import Any, Optional
-from canonicaljson import json
-
from synapse.storage.database import LoggingTransaction # noqa: F401
from synapse.storage.database import make_in_list_sql_clause # noqa: F401
from synapse.storage.database import DatabasePool
from synapse.types import Collection, get_domain_from_id
+from synapse.util import json_decoder
logger = logging.getLogger(__name__)
@@ -99,13 +98,13 @@ def db_to_json(db_content):
if isinstance(db_content, memoryview):
db_content = db_content.tobytes()
- # Decode it to a Unicode string before feeding it to json.loads, since
+ # Decode it to a Unicode string before feeding it to the JSON decoder, since
# Python 3.5 does not support deserializing bytes.
if isinstance(db_content, (bytes, bytearray)):
db_content = db_content.decode("utf8")
try:
- return json.loads(db_content)
+ return json_decoder.decode(db_content)
except Exception:
logging.warning("Tried to decode '%r' as JSON and failed", db_content)
raise
diff --git a/synapse/storage/databases/main/events_worker.py b/synapse/storage/databases/main/events_worker.py
index e3a154a527..4a3333c0db 100644
--- a/synapse/storage/databases/main/events_worker.py
+++ b/synapse/storage/databases/main/events_worker.py
@@ -596,8 +596,20 @@ class EventsWorkerStore(SQLBaseStore):
if not allow_rejected and rejected_reason:
continue
- d = db_to_json(row["json"])
- internal_metadata = db_to_json(row["internal_metadata"])
+ # If the event or metadata cannot be parsed, log the error and act
+ # as if the event is unknown.
+ try:
+ d = db_to_json(row["json"])
+ except ValueError:
+ logger.error("Unable to parse json from event: %s", event_id)
+ continue
+ try:
+ internal_metadata = db_to_json(row["internal_metadata"])
+ except ValueError:
+ logger.error(
+ "Unable to parse internal_metadata from event: %s", event_id
+ )
+ continue
format_version = row["format_version"]
if format_version is None:
diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index b3f76428b6..b2a22dbd5c 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -25,8 +25,18 @@ from synapse.logging import context
logger = logging.getLogger(__name__)
-# Create a custom encoder to reduce the whitespace produced by JSON encoding.
-json_encoder = json.JSONEncoder(separators=(",", ":"))
+
+def _reject_invalid_json(val):
+ """Do not allow Infinity, -Infinity, or NaN values in JSON."""
+ raise json.JSONDecodeError("Invalid JSON value: '%s'" % val)
+
+
+# Create a custom encoder to reduce the whitespace produced by JSON encoding and
+# ensure that valid JSON is produced.
+json_encoder = json.JSONEncoder(allow_nan=False, separators=(",", ":"))
+
+# Create a custom decoder to reject Python extensions to JSON.
+json_decoder = json.JSONDecoder(parse_constant=_reject_invalid_json)
def unwrapFirstError(failure):
|
