1 files changed, 19 insertions, 11 deletions
diff --git a/synapse/http/client.py b/synapse/http/client.py
index c34b086eb9..dea61ba1e0 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -23,6 +23,7 @@ from twisted.web.http_headers import Headers
 
 from synapse.http.endpoint import matrix_endpoint
 from synapse.util.async import sleep
+from synapse.util.logcontext import PreserveLoggingContext
 
 from syutil.jsonutil import encode_canonical_json
 
@@ -108,16 +109,17 @@ class BaseHttpClient(object):
                 producer = body_callback(method, url_bytes, headers_dict)
 
             try:
-                response = yield self.agent.request(
-                    destination,
-                    endpoint,
-                    method,
-                    path_bytes,
-                    param_bytes,
-                    query_bytes,
-                    Headers(headers_dict),
-                    producer
-                )
+                with PreserveLoggingContext():
+                    response = yield self.agent.request(
+                        destination,
+                        endpoint,
+                        method,
+                        path_bytes,
+                        param_bytes,
+                        query_bytes,
+                        Headers(headers_dict),
+                        producer
+                    )
 
                 logger.debug("Got response to %s", method)
                 break
@@ -258,7 +260,13 @@ class MatrixHttpClient(BaseHttpClient):
         """
         logger.debug("get_json args: %s", args)
 
-        query_bytes = urllib.urlencode(args, True)
+        encoded_args = {}
+        for k, vs in args.items():
+            if isinstance(vs, basestring):
+                vs = [vs]
+            encoded_args[k] = [v.encode("UTF-8") for v in vs]
+
+        query_bytes = urllib.urlencode(encoded_args, True)
         logger.debug("Query bytes: %s Retry DNS: %s", args, retry_on_dns_fail)
 
         def body_callback(method, url_bytes, headers_dict):