Fix encoding for account validity HTML files on Python 2

synapse/rest/client/v2_alpha/account_validity.py

@@ -15,6 +15,8 @@
 
 import logging
 
+from six import ensure_binary
+
 from twisted.internet import defer
 
 from synapse.api.errors import AuthError, SynapseError
@@ -63,7 +65,7 @@ class AccountValidityRenewServlet(RestServlet):
         request.setResponseCode(status_code)
         request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
         request.setHeader(b"Content-Length", b"%d" % (len(response),))
-        request.write(response.encode("utf8"))
+        request.write(ensure_binary(response))
         finish_request(request)
         defer.returnValue(None)
 

tests/rest/client/v2_alpha/test_register.py

@@ -20,6 +20,7 @@ import json
 import os
 
 from mock import Mock
+from six import ensure_binary
 
 import pkg_resources
 
@@ -437,7 +438,7 @@ class AccountValidityRenewalByEmailTestCase(unittest.HomeserverTestCase):
         # Check that the HTML we're getting is the one we expect on a successful renewal.
         expected_html = self.hs.config.account_validity.account_renewed_html_content
         self.assertEqual(
-            channel.result["body"], expected_html.encode("utf8"), channel.result
+            channel.result["body"], ensure_binary(expected_html), channel.result
         )
 
         # Move 3 days forward. If the renewal failed, every authed request with
@@ -467,7 +468,7 @@ class AccountValidityRenewalByEmailTestCase(unittest.HomeserverTestCase):
         # invalid/unknown token.
         expected_html = self.hs.config.account_validity.invalid_token_html_content
         self.assertEqual(
-            channel.result["body"], expected_html.encode("utf8"), channel.result
+            channel.result["body"], ensure_binary(expected_html), channel.result
         )
 
     def test_manual_email_send(self):