zulip/zephyr/middleware.py

171 lines
7.6 KiB
Python

from __future__ import absolute_import
from django.conf import settings
from zephyr.decorator import RequestVariableMissingError, RequestVariableConversionError
from zephyr.lib.response import json_error
from django.db import connection
from zephyr.lib.utils import statsd
from zephyr.lib.cache import get_memcached_time, get_memcached_requests
from zephyr.lib.bugdown import get_bugdown_time, get_bugdown_requests
import logging
import time
logger = logging.getLogger('humbug.requests')
def async_request_stop(request):
request._time_stopped = time.time()
request._memcached_time_stopped = get_memcached_time()
request._memcached_requests_stopped = get_memcached_requests()
request._bugdown_time_stopped = get_bugdown_time()
request._bugdown_requests_stopped = get_bugdown_requests()
def async_request_restart(request):
request._time_restarted = time.time()
request._memcached_time_restarted = get_memcached_time()
request._memcached_requests_restarted = get_memcached_requests()
request._bugdown_time_restarted = get_bugdown_time()
request._bugdown_requests_restarted = get_bugdown_requests()
class LogRequests(object):
def process_request(self, request):
request._time_started = time.time()
request._memcached_time_start = get_memcached_time()
request._memcached_requests_start = get_memcached_requests()
request._bugdown_time_start = get_bugdown_time()
request._bugdown_requests_start = get_bugdown_requests()
def process_response(self, request, response):
def timedelta_ms(timedelta):
return timedelta * 1000
def format_timedelta(timedelta):
if (timedelta >= 1):
return "%.1fs" % (timedelta)
return "%.0fms" % (timedelta_ms(timedelta),)
# For statsd timer name
if request.path == '/':
statsd_path = 'webreq'
else:
statsd_path = "webreq.%s" % (request.path[1:].replace('/', '.'),)
# The reverse proxy might have sent us the real external IP
remote_ip = request.META.get('HTTP_X_REAL_IP')
if remote_ip is None:
remote_ip = request.META['REMOTE_ADDR']
time_delta = -1
# A time duration of -1 means the StartLogRequests middleware
# didn't run for some reason
optional_orig_delta = ""
if hasattr(request, '_time_started'):
time_delta = time.time() - request._time_started
if hasattr(request, "_time_stopped"):
orig_time_delta = time_delta
time_delta = ((request._time_stopped - request._time_started) +
(time.time() - request._time_restarted))
optional_orig_delta = " (lp: %s)" % (format_timedelta(orig_time_delta),)
memcached_output = ""
if hasattr(request, '_memcached_time_start'):
memcached_time_delta = get_memcached_time() - request._memcached_time_start
memcached_count_delta = get_memcached_requests() - request._memcached_requests_start
if hasattr(request, "_memcached_requests_stopped"):
# (now - restarted) + (stopped - start) = (now - start) + (stopped - restarted)
memcached_time_delta += (request._memcached_time_stopped -
request._memcached_time_restarted)
memcached_count_delta += (request._memcached_requests_stopped -
request._memcached_requests_restarted)
if (memcached_time_delta > 0.005):
memcached_output = " (mem: %s/%s)" % (format_timedelta(memcached_time_delta),
memcached_count_delta)
statsd.timing("%s.memcached.time" % (statsd_path,), timedelta_ms(memcached_time_delta))
statsd.incr("%s.memcached.querycount" % (statsd_path,), memcached_count_delta)
bugdown_output = ""
if hasattr(request, '_bugdown_time_start'):
bugdown_time_delta = get_bugdown_time() - request._bugdown_time_start
bugdown_count_delta = get_bugdown_requests() - request._bugdown_requests_start
if hasattr(request, "_bugdown_requests_stopped"):
# (now - restarted) + (stopped - start) = (now - start) + (stopped - restarted)
bugdown_time_delta += (request._bugdown_time_stopped -
request._bugdown_time_restarted)
bugdown_count_delta += (request._bugdown_requests_stopped -
request._bugdown_requests_restarted)
if (bugdown_time_delta > 0.005):
bugdown_output = " (md: %s/%s)" % (format_timedelta(bugdown_time_delta),
bugdown_count_delta)
statsd.timing("%s.markdown.time" % (statsd_path,), timedelta_ms(bugdown_time_delta))
statsd.incr("%s.markdown.count" % (statsd_path,), bugdown_count_delta)
# Get the amount of time spent doing database queries
db_time_output = ""
if len(connection.queries) > 0:
query_time = sum(float(query.get('time', 0)) for query in connection.queries)
db_time_output = " (db: %s/%sq)" % (format_timedelta(query_time),
len(connection.queries))
# Log ms, db ms, and num queries to statsd
statsd.timing("%s.dbtime" % (statsd_path,), timedelta_ms(query_time))
statsd.incr("%s.dbq" % (statsd_path, ), len(connection.queries))
statsd.timing("%s.total" % (statsd_path,), timedelta_ms(time_delta))
# Get the requestor's email address and client, if available.
try:
email = request._email
except Exception:
email = "unauth"
try:
client = request.client.name
except Exception:
client = "?"
logger.info('%-15s %-7s %3d %5s%s%s%s%s %s (%s via %s)' %
(remote_ip, request.method, response.status_code,
format_timedelta(time_delta), optional_orig_delta,
memcached_output, bugdown_output,
db_time_output, request.get_full_path(), email, client))
# Log some additional data whenever we return certain 40x errors
if 400 <= response.status_code < 500 and response.status_code not in [401, 404, 405]:
content = response.content
if len(content) > 100:
content = "[content more than 100 characters]"
logger.info('status=%3d, data=%s, uid=%s' % (response.status_code, content, email))
return response
class JsonErrorHandler(object):
def process_exception(self, request, exception):
if hasattr(exception, 'to_json_error_msg') and callable(exception.to_json_error_msg):
return json_error(exception.to_json_error_msg())
return None
# Monkeypatch in time tracking to the Django non-debug cursor
# Code comes from CursorDebugWrapper
def wrapper_execute(self, action, sql, params=()):
self.set_dirty()
start = time.time()
try:
return action(sql, params)
finally:
stop = time.time()
duration = stop - start
self.db.queries.append({
'time': "%.3f" % duration,
})
from django.db.backends.util import CursorWrapper
def cursor_execute(self, sql, params=()):
return wrapper_execute(self, self.cursor.execute, sql, params)
CursorWrapper.execute = cursor_execute
def cursor_executemany(self, sql, params=()):
return wrapper_execute(self, self.cursor.executemany, sql, params)
CursorWrapper.executemany = cursor_executemany