Do not use canonicaljson to magically handle decoding bytes from JSON. (#7802)

2 files changed, 9 insertions, 19 deletions

diff --git a/synapse/http/client.py b/synapse/http/client.py
index 8743e9839d..505872ee90 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -13,13 +13,13 @@
 # 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
 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
@@ -371,7 +371,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            return json.loads(body)
+            return json.loads(body.decode("utf-8"))
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -412,7 +412,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            return json.loads(body)
+            return json.loads(body.decode("utf-8"))
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -441,7 +441,7 @@ class SimpleHttpClient(object):
             actual_headers.update(headers)
 
         body = yield self.get_raw(uri, args, headers=headers)
-        return json.loads(body)
+        return json.loads(body.decode("utf-8"))
 
     @defer.inlineCallbacks
     def put_json(self, uri, json_body, args={}, headers=None):
@@ -485,7 +485,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            return json.loads(body)
+            return json.loads(body.decode("utf-8"))
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -503,7 +503,7 @@ class SimpleHttpClient(object):
                header name to a list of values for that header
         Returns:
             Deferred: Succeeds when we get *any* 2xx HTTP response, with the
-            HTTP body at text.
+            HTTP body as bytes.
         Raises:
             HttpResponseException on a non-2xx HTTP response.
         """
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py
index 13fcb408a6..3cabe9d02e 100644
--- a/synapse/http/servlet.py
+++ b/synapse/http/servlet.py
@@ -14,11 +14,9 @@
 # limitations under the License.
 
 """ This module contains base REST classes for constructing REST servlets. """
-
+import json
 import logging
 
-from canonicaljson import json
-
 from synapse.api.errors import Codes, SynapseError
 
 logger = logging.getLogger(__name__)
@@ -214,16 +212,8 @@ def parse_json_value_from_request(request, allow_empty_body=False):
     if not content_bytes and allow_empty_body:
         return None
 
-    # Decode to Unicode so that simplejson will return Unicode strings on
-    # Python 2
-    try:
-        content_unicode = content_bytes.decode("utf8")
-    except UnicodeDecodeError:
-        logger.warning("Unable to decode UTF-8")
-        raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
-
     try:
-        content = json.loads(content_unicode)
+        content = json.loads(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)