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# -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# 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 logging
import os
import os.path
import shutil
import sys
import textwrap
from twisted.logger import Logger, eventAsText, eventsFromJSONLogFile
from synapse.config.logger import setup_logging
from synapse.logging._structured import setup_structured_logging
from synapse.logging.context import LoggingContext
from tests.unittest import DEBUG, HomeserverTestCase
class FakeBeginner:
def beginLoggingTo(self, observers, **kwargs):
self.observers = observers
class StructuredLoggingTestBase:
"""
Test base that registers a cleanup handler to reset the stdlib log handler
to 'unset'.
"""
def prepare(self, reactor, clock, hs):
def _cleanup():
logging.getLogger("synapse").setLevel(logging.NOTSET)
self.addCleanup(_cleanup)
class StructuredLoggingTestCase(StructuredLoggingTestBase, HomeserverTestCase):
"""
Tests for Synapse's structured logging support.
"""
def test_output_to_json_round_trip(self):
"""
Synapse logs can be outputted to JSON and then read back again.
"""
temp_dir = self.mktemp()
os.mkdir(temp_dir)
self.addCleanup(shutil.rmtree, temp_dir)
json_log_file = os.path.abspath(os.path.join(temp_dir, "out.json"))
log_config = {
"drains": {"jsonfile": {"type": "file_json", "location": json_log_file}}
}
# Begin the logger with our config
beginner = FakeBeginner()
setup_structured_logging(
self.hs, self.hs.config, log_config, logBeginner=beginner
)
# Make a logger and send an event
logger = Logger(
namespace="tests.logging.test_structured", observer=beginner.observers[0]
)
logger.info("Hello there, {name}!", name="wally")
# Read the log file and check it has the event we sent
with open(json_log_file, "r") as f:
logged_events = list(eventsFromJSONLogFile(f))
self.assertEqual(len(logged_events), 1)
# The event pulled from the file should render fine
self.assertEqual(
eventAsText(logged_events[0], includeTimestamp=False),
"[tests.logging.test_structured#info] Hello there, wally!",
)
def test_output_to_text(self):
"""
Synapse logs can be outputted to text.
"""
temp_dir = self.mktemp()
os.mkdir(temp_dir)
self.addCleanup(shutil.rmtree, temp_dir)
log_file = os.path.abspath(os.path.join(temp_dir, "out.log"))
log_config = {"drains": {"file": {"type": "file", "location": log_file}}}
# Begin the logger with our config
beginner = FakeBeginner()
setup_structured_logging(
self.hs, self.hs.config, log_config, logBeginner=beginner
)
# Make a logger and send an event
logger = Logger(
namespace="tests.logging.test_structured", observer=beginner.observers[0]
)
logger.info("Hello there, {name}!", name="wally")
# Read the log file and check it has the event we sent
with open(log_file, "r") as f:
logged_events = f.read().strip().split("\n")
self.assertEqual(len(logged_events), 1)
# The event pulled from the file should render fine
self.assertTrue(
logged_events[0].endswith(
" - tests.logging.test_structured - INFO - None - Hello there, wally!"
)
)
def test_collects_logcontext(self):
"""
Test that log outputs have the attached logging context.
"""
log_config = {"drains": {}}
# Begin the logger with our config
beginner = FakeBeginner()
publisher = setup_structured_logging(
self.hs, self.hs.config, log_config, logBeginner=beginner
)
logs = []
publisher.addObserver(logs.append)
# Make a logger and send an event
logger = Logger(
namespace="tests.logging.test_structured", observer=beginner.observers[0]
)
with LoggingContext("testcontext", request="somereq"):
logger.info("Hello there, {name}!", name="steve")
self.assertEqual(len(logs), 1)
self.assertEqual(logs[0]["request"], "somereq")
class StructuredLoggingConfigurationFileTestCase(
StructuredLoggingTestBase, HomeserverTestCase
):
def make_homeserver(self, reactor, clock):
tempdir = self.mktemp()
os.mkdir(tempdir)
log_config_file = os.path.abspath(os.path.join(tempdir, "log.config.yaml"))
self.homeserver_log = os.path.abspath(os.path.join(tempdir, "homeserver.log"))
config = self.default_config()
config["log_config"] = log_config_file
with open(log_config_file, "w") as f:
f.write(
textwrap.dedent(
"""\
structured: true
drains:
file:
type: file_json
location: %s
"""
% (self.homeserver_log,)
)
)
self.addCleanup(self._sys_cleanup)
return self.setup_test_homeserver(config=config)
def _sys_cleanup(self):
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
# Do not remove! We need the logging system to be set other than WARNING.
@DEBUG
def test_log_output(self):
"""
When a structured logging config is given, Synapse will use it.
"""
beginner = FakeBeginner()
publisher = setup_logging(self.hs, self.hs.config, logBeginner=beginner)
# Make a logger and send an event
logger = Logger(namespace="tests.logging.test_structured", observer=publisher)
with LoggingContext("testcontext", request="somereq"):
logger.info("Hello there, {name}!", name="steve")
with open(self.homeserver_log, "r") as f:
logged_events = [
eventAsText(x, includeTimestamp=False) for x in eventsFromJSONLogFile(f)
]
logs = "\n".join(logged_events)
self.assertTrue("***** STARTING SERVER *****" in logs)
self.assertTrue("Hello there, steve!" in logs)
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