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-rw-r--r--synapse/config/_base.py6
-rw-r--r--synapse/config/logger.py2
-rw-r--r--synapse/config/tls.py4
-rw-r--r--synapse/events/__init__.py18
-rw-r--r--synapse/federation/federation_client.py4
-rw-r--r--synapse/handlers/appservice.py14
-rw-r--r--synapse/handlers/federation.py6
-rw-r--r--synapse/handlers/room_list.py4
-rw-r--r--synapse/http/client.py4
-rw-r--r--synapse/push/httppusher.py4
-rw-r--r--synapse/push/pusher.py2
-rw-r--r--synapse/replication/tcp/protocol.py4
-rw-r--r--synapse/replication/tcp/resource.py4
-rw-r--r--synapse/storage/registration.py4
-rw-r--r--synapse/storage/schema/delta/30/as_users.py4
-rw-r--r--synapse/storage/stream.py4
-rw-r--r--synapse/storage/tags.py4
-rw-r--r--synapse/util/async.py6
-rw-r--r--synapse/util/logcontext.py8
-rw-r--r--synapse/util/logformatter.py2
-rw-r--r--synapse/util/stringutils.py5
-rw-r--r--synapse/util/wheel_timer.py4
22 files changed, 78 insertions, 39 deletions
diff --git a/synapse/config/_base.py b/synapse/config/_base.py
index 32b439d20a..b748ed2b0a 100644
--- a/synapse/config/_base.py
+++ b/synapse/config/_base.py
@@ -281,15 +281,15 @@ class Config(object):
                     )
                 if not cls.path_exists(config_dir_path):
                     os.makedirs(config_dir_path)
-                with open(config_path, "wb") as config_file:
-                    config_bytes, config = obj.generate_config(
+                with open(config_path, "w") as config_file:
+                    config_str, config = obj.generate_config(
                         config_dir_path=config_dir_path,
                         server_name=server_name,
                         report_stats=(config_args.report_stats == "yes"),
                         is_generating_file=True
                     )
                     obj.invoke_all("generate_files", config)
-                    config_file.write(config_bytes)
+                    config_file.write(config_str)
                 print((
                     "A config file has been generated in %r for server name"
                     " %r with corresponding SSL keys and self-signed"
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index 3f70039acd..6a7228dc2f 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -117,7 +117,7 @@ class LoggingConfig(Config):
         log_config = config.get("log_config")
         if log_config and not os.path.exists(log_config):
             log_file = self.abspath("homeserver.log")
-            with open(log_config, "wb") as log_config_file:
+            with open(log_config, "w") as log_config_file:
                 log_config_file.write(
                     DEFAULT_LOG_CONFIG.substitute(log_file=log_file)
                 )
diff --git a/synapse/config/tls.py b/synapse/config/tls.py
index 29eb012ddb..b66154bc7c 100644
--- a/synapse/config/tls.py
+++ b/synapse/config/tls.py
@@ -133,7 +133,7 @@ class TlsConfig(Config):
         tls_dh_params_path = config["tls_dh_params_path"]
 
         if not self.path_exists(tls_private_key_path):
-            with open(tls_private_key_path, "w") as private_key_file:
+            with open(tls_private_key_path, "wb") as private_key_file:
                 tls_private_key = crypto.PKey()
                 tls_private_key.generate_key(crypto.TYPE_RSA, 2048)
                 private_key_pem = crypto.dump_privatekey(
@@ -148,7 +148,7 @@ class TlsConfig(Config):
                 )
 
         if not self.path_exists(tls_certificate_path):
-            with open(tls_certificate_path, "w") as certificate_file:
+            with open(tls_certificate_path, "wb") as certificate_file:
                 cert = crypto.X509()
                 subject = cert.get_subject()
                 subject.CN = config["server_name"]
diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index e673e96cc0..c3ff85c49a 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -47,14 +47,26 @@ class _EventInternalMetadata(object):
 
 
 def _event_dict_property(key):
+    # We want to be able to use hasattr with the event dict properties.
+    # However, (on python3) hasattr expects AttributeError to be raised. Hence,
+    # we need to transform the KeyError into an AttributeError
     def getter(self):
-        return self._event_dict[key]
+        try:
+            return self._event_dict[key]
+        except KeyError:
+            raise AttributeError(key)
 
     def setter(self, v):
-        self._event_dict[key] = v
+        try:
+            self._event_dict[key] = v
+        except KeyError:
+            raise AttributeError(key)
 
     def delete(self):
-        del self._event_dict[key]
+        try:
+            del self._event_dict[key]
+        except KeyError:
+            raise AttributeError(key)
 
     return property(
         getter,
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index 8adc60863e..6163f7c466 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -19,6 +19,8 @@ import itertools
 import logging
 import random
 
+from six.moves import range
+
 from twisted.internet import defer
 
 from synapse.api.constants import Membership
@@ -413,7 +415,7 @@ class FederationClient(FederationBase):
 
         batch_size = 20
         missing_events = list(missing_events)
-        for i in xrange(0, len(missing_events), batch_size):
+        for i in range(0, len(missing_events), batch_size):
             batch = set(missing_events[i:i + batch_size])
 
             deferreds = [
diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py
index f6c7b89270..b596f098fd 100644
--- a/synapse/handlers/appservice.py
+++ b/synapse/handlers/appservice.py
@@ -260,11 +260,15 @@ class ApplicationServicesHandler(object):
             event based on the service regex.
         """
         services = self.store.get_app_services()
-        interested_list = [
-            s for s in services if (
-                yield s.is_interested(event, self.store)
-            )
-        ]
+
+        # we can't use a list comprehension here. Since python 3, list
+        # comprehensions use a generator internally. This means you can't yield
+        # inside of a list comprehension anymore.
+        interested_list = []
+        for s in services:
+            if (yield s.is_interested(event, self.store)):
+                interested_list.append(s)
+
         defer.returnValue(interested_list)
 
     def _get_services_for_user(self, user_id):
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index bab0db2904..f39233d846 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -16,7 +16,6 @@
 
 """Contains handlers for federation events."""
 
-import httplib
 import itertools
 import logging
 import sys
@@ -24,6 +23,7 @@ import sys
 from signedjson.key import decode_verify_key_bytes
 from signedjson.sign import verify_signed_json
 import six
+from six.moves import http_client
 from twisted.internet import defer
 from unpaddedbase64 import decode_base64
 
@@ -890,7 +890,7 @@ class FederationHandler(BaseHandler):
             logger.warn("Rejecting event %s which has %i prev_events",
                         ev.event_id, len(ev.prev_events))
             raise SynapseError(
-                httplib.BAD_REQUEST,
+                http_client.BAD_REQUEST,
                 "Too many prev_events",
             )
 
@@ -898,7 +898,7 @@ class FederationHandler(BaseHandler):
             logger.warn("Rejecting event %s which has %i auth_events",
                         ev.event_id, len(ev.auth_events))
             raise SynapseError(
-                httplib.BAD_REQUEST,
+                http_client.BAD_REQUEST,
                 "Too many auth_events",
             )
 
diff --git a/synapse/handlers/room_list.py b/synapse/handlers/room_list.py
index add3f9b009..5757bb7f8a 100644
--- a/synapse/handlers/room_list.py
+++ b/synapse/handlers/room_list.py
@@ -15,6 +15,8 @@
 
 from twisted.internet import defer
 
+from six.moves import range
+
 from ._base import BaseHandler
 
 from synapse.api.constants import (
@@ -200,7 +202,7 @@ class RoomListHandler(BaseHandler):
             step = len(rooms_to_scan) if len(rooms_to_scan) != 0 else 1
 
         chunk = []
-        for i in xrange(0, len(rooms_to_scan), step):
+        for i in range(0, len(rooms_to_scan), step):
             batch = rooms_to_scan[i:i + step]
             logger.info("Processing %i rooms for result", len(batch))
             yield concurrently_execute(
diff --git a/synapse/http/client.py b/synapse/http/client.py
index 62309c3365..70a19d9b74 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -40,7 +40,7 @@ from twisted.web.http import PotentialDataLoss
 from twisted.web.http_headers import Headers
 from twisted.web._newclient import ResponseDone
 
-from StringIO import StringIO
+from six import StringIO
 
 import simplejson as json
 import logging
@@ -507,7 +507,7 @@ class SpiderHttpClient(SimpleHttpClient):
                     reactor,
                     SpiderEndpointFactory(hs)
                 )
-            ), [('gzip', GzipDecoder)]
+            ), [(b'gzip', GzipDecoder)]
         )
         # We could look like Chrome:
         # self.user_agent = ("Mozilla/5.0 (%s) (KHTML, like Gecko)
diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index 1420d378ef..b077e1a446 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -18,8 +18,8 @@ import logging
 from twisted.internet import defer, reactor
 from twisted.internet.error import AlreadyCalled, AlreadyCancelled
 
-import push_rule_evaluator
-import push_tools
+from . import push_rule_evaluator
+from . import push_tools
 import synapse
 from synapse.push import PusherConfigException
 from synapse.util.logcontext import LoggingContext
diff --git a/synapse/push/pusher.py b/synapse/push/pusher.py
index 71576330a9..5aa6667e91 100644
--- a/synapse/push/pusher.py
+++ b/synapse/push/pusher.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from httppusher import HttpPusher
+from .httppusher import HttpPusher
 
 import logging
 logger = logging.getLogger(__name__)
diff --git a/synapse/replication/tcp/protocol.py b/synapse/replication/tcp/protocol.py
index 0a9a290af4..d7d38464b2 100644
--- a/synapse/replication/tcp/protocol.py
+++ b/synapse/replication/tcp/protocol.py
@@ -53,12 +53,12 @@ from twisted.internet import defer
 from twisted.protocols.basic import LineOnlyReceiver
 from twisted.python.failure import Failure
 
-from commands import (
+from .commands import (
     COMMAND_MAP, VALID_CLIENT_COMMANDS, VALID_SERVER_COMMANDS,
     ErrorCommand, ServerCommand, RdataCommand, PositionCommand, PingCommand,
     NameCommand, ReplicateCommand, UserSyncCommand, SyncCommand,
 )
-from streams import STREAMS_MAP
+from .streams import STREAMS_MAP
 
 from synapse.util.stringutils import random_string
 from synapse.metrics.metric import CounterMetric
diff --git a/synapse/replication/tcp/resource.py b/synapse/replication/tcp/resource.py
index 786c3fe864..a41af4fd6c 100644
--- a/synapse/replication/tcp/resource.py
+++ b/synapse/replication/tcp/resource.py
@@ -18,8 +18,8 @@
 from twisted.internet import defer, reactor
 from twisted.internet.protocol import Factory
 
-from streams import STREAMS_MAP, FederationStream
-from protocol import ServerReplicationStreamProtocol
+from .streams import STREAMS_MAP, FederationStream
+from .protocol import ServerReplicationStreamProtocol
 
 from synapse.util.metrics import Measure, measure_func
 
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 6b557ca0cf..a50717db2d 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -22,6 +22,8 @@ from synapse.storage import background_updates
 from synapse.storage._base import SQLBaseStore
 from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
 
+from six.moves import range
+
 
 class RegistrationWorkerStore(SQLBaseStore):
     @cached()
@@ -469,7 +471,7 @@ class RegistrationStore(RegistrationWorkerStore,
                 match = regex.search(user_id)
                 if match:
                     found.add(int(match.group(1)))
-            for i in xrange(len(found) + 1):
+            for i in range(len(found) + 1):
                 if i not in found:
                     return i
 
diff --git a/synapse/storage/schema/delta/30/as_users.py b/synapse/storage/schema/delta/30/as_users.py
index c53e53c94f..85bd1a2006 100644
--- a/synapse/storage/schema/delta/30/as_users.py
+++ b/synapse/storage/schema/delta/30/as_users.py
@@ -14,6 +14,8 @@
 import logging
 from synapse.config.appservice import load_appservices
 
+from six.moves import range
+
 
 logger = logging.getLogger(__name__)
 
@@ -58,7 +60,7 @@ def run_upgrade(cur, database_engine, config, *args, **kwargs):
 
     for as_id, user_ids in owned.items():
         n = 100
-        user_chunks = (user_ids[i:i + 100] for i in xrange(0, len(user_ids), n))
+        user_chunks = (user_ids[i:i + 100] for i in range(0, len(user_ids), n))
         for chunk in user_chunks:
             cur.execute(
                 database_engine.convert_param_style(
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 4a5481ae53..f0784ba137 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -47,6 +47,8 @@ from synapse.storage.engines import PostgresEngine, Sqlite3Engine
 import abc
 import logging
 
+from six.moves import range
+
 
 logger = logging.getLogger(__name__)
 
@@ -196,7 +198,7 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
 
         results = {}
         room_ids = list(room_ids)
-        for rm_ids in (room_ids[i:i + 20] for i in xrange(0, len(room_ids), 20)):
+        for rm_ids in (room_ids[i:i + 20] for i in range(0, len(room_ids), 20)):
             res = yield make_deferred_yieldable(defer.gatherResults([
                 run_in_background(
                     self.get_room_events_stream_for_room,
diff --git a/synapse/storage/tags.py b/synapse/storage/tags.py
index 13bff9f055..6671d3cfca 100644
--- a/synapse/storage/tags.py
+++ b/synapse/storage/tags.py
@@ -22,6 +22,8 @@ from twisted.internet import defer
 import simplejson as json
 import logging
 
+from six.moves import range
+
 logger = logging.getLogger(__name__)
 
 
@@ -98,7 +100,7 @@ class TagsWorkerStore(AccountDataWorkerStore):
 
         batch_size = 50
         results = []
-        for i in xrange(0, len(tag_ids), batch_size):
+        for i in range(0, len(tag_ids), batch_size):
             tags = yield self.runInteraction(
                 "get_all_updated_tag_content",
                 get_tag_content,
diff --git a/synapse/util/async.py b/synapse/util/async.py
index 4a762d1e72..9dd4e6b5bc 100644
--- a/synapse/util/async.py
+++ b/synapse/util/async.py
@@ -27,6 +27,8 @@ from contextlib import contextmanager
 
 import logging
 
+from six.moves import range
+
 logger = logging.getLogger(__name__)
 
 
@@ -158,13 +160,13 @@ def concurrently_execute(func, args, limit):
     def _concurrently_execute_inner():
         try:
             while True:
-                yield func(it.next())
+                yield func(next(it))
         except StopIteration:
             pass
 
     return logcontext.make_deferred_yieldable(defer.gatherResults([
         run_in_background(_concurrently_execute_inner)
-        for _ in xrange(limit)
+        for _ in range(limit)
     ], consumeErrors=True)).addErrback(unwrapFirstError)
 
 
diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py
index bbadeec922..01ac71e53e 100644
--- a/synapse/util/logcontext.py
+++ b/synapse/util/logcontext.py
@@ -313,7 +313,13 @@ def run_in_background(f, *args, **kwargs):
     indication about where it came from.
     """
     current = LoggingContext.current_context()
-    res = f(*args, **kwargs)
+    try:
+        res = f(*args, **kwargs)
+    except:   # noqa: E722
+        # the assumption here is that the caller doesn't want to be disturbed
+        # by synchronous exceptions, so let's turn them into Failures.
+        return defer.fail()
+
     if isinstance(res, defer.Deferred) and not res.called:
         # The function will have reset the context before returning, so
         # we need to restore it now.
diff --git a/synapse/util/logformatter.py b/synapse/util/logformatter.py
index cdbc4bffd7..59ab3c6968 100644
--- a/synapse/util/logformatter.py
+++ b/synapse/util/logformatter.py
@@ -14,7 +14,7 @@
 # limitations under the License.
 
 
-import StringIO
+from six import StringIO
 import logging
 import traceback
 
diff --git a/synapse/util/stringutils.py b/synapse/util/stringutils.py
index 95a6168e16..b98b9dc6e4 100644
--- a/synapse/util/stringutils.py
+++ b/synapse/util/stringutils.py
@@ -15,6 +15,7 @@
 
 import random
 import string
+from six.moves import range
 
 _string_with_symbols = (
     string.digits + string.ascii_letters + ".,;:^&*-_+=#~@"
@@ -22,12 +23,12 @@ _string_with_symbols = (
 
 
 def random_string(length):
-    return ''.join(random.choice(string.ascii_letters) for _ in xrange(length))
+    return ''.join(random.choice(string.ascii_letters) for _ in range(length))
 
 
 def random_string_with_symbols(length):
     return ''.join(
-        random.choice(_string_with_symbols) for _ in xrange(length)
+        random.choice(_string_with_symbols) for _ in range(length)
     )
 
 
diff --git a/synapse/util/wheel_timer.py b/synapse/util/wheel_timer.py
index b70f9a6b0a..7a9e45aca9 100644
--- a/synapse/util/wheel_timer.py
+++ b/synapse/util/wheel_timer.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from six.moves import range
+
 
 class _Entry(object):
     __slots__ = ["end_key", "queue"]
@@ -68,7 +70,7 @@ class WheelTimer(object):
         # Add empty entries between the end of the current list and when we want
         # to insert. This ensures there are no gaps.
         self.entries.extend(
-            _Entry(key) for key in xrange(last_key, then_key + 1)
+            _Entry(key) for key in range(last_key, then_key + 1)
         )
 
         self.entries[-1].queue.append(obj)