From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 2 Apr 2017 01:29:42 +0000 (+0100)
Subject: filter out twisted stuff
X-Git-Tag: hippotat/1.0.0~55^2~138
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=hippotat.git;a=commitdiff_plain;h=b83d422a15ee072d89643a85832400cb09e353ac;ds=sidebyside

filter out twisted stuff
---

diff --git a/hippotat/__init__.py b/hippotat/__init__.py
index b6a84d9..0b827c9 100644
--- a/hippotat/__init__.py
+++ b/hippotat/__init__.py
@@ -5,6 +5,8 @@ signal.signal(signal.SIGINT, signal.SIG_DFL)
 
 import sys
 
+from zope.interface import implementer
+
 import twisted
 from twisted.internet import reactor
 import twisted.internet.endpoints
@@ -47,6 +49,10 @@ class DBG(twisted.python.constants.Names):
 
 _hex_codec = codecs.getencoder('hex_codec')
 
+#---------- logging ----------
+
+org_stderr = sys.stderr
+
 log = twisted.logger.Logger()
 
 debug_set = set([x for x in DBG.iterconstants() if x <= DBG.HTTP])
@@ -62,6 +68,25 @@ def log_debug(dflag, msg, idof=None, d=None):
     msg += ' ' + d
   log.info('{dflag} {msgcore}', dflag=dflag, msgcore=msg)
 
+@implementer(twisted.logger.ILogFilterPredicate)
+class LogNotBoringTwisted:
+  def __call__(self, event):
+    yes = twisted.logger.PredicateResult.yes
+    no  = twisted.logger.PredicateResult.no
+    try:
+      if event.get('log_level') != LogLevel.info:
+        return yes
+      try:
+        dflag = event.get('dflag')
+      except KeyError:
+        dflag = DBG.TWISTED
+      return yes if (dflag in debug_set) else no
+    except Exception:
+      print(traceback.format_exc(), file=org_stderr)
+      return yes
+
+#---------- default config ----------
+
 defcfg = '''
 [DEFAULT]
 #[<client>] overrides
@@ -376,9 +401,13 @@ def common_startup():
   stdout_obs = twisted.logger.FileLogObserver(sys.stdout, log_formatter)
   stderr_obs = twisted.logger.FileLogObserver(sys.stderr, log_formatter)
   pred = twisted.logger.LogLevelFilterPredicate(LogLevel.error)
-  log_observer = twisted.logger.FilteringLogObserver(
+  stdsomething_obs = twisted.logger.FilteringLogObserver(
     stderr_obs, [pred], stdout_obs
   )
+  log_observer = twisted.logger.FilteringLogObserver(
+    stdsomething_obs, [LogNotBoringTwisted()]
+  )
+  #log_observer = stdsomething_obs
   twisted.logger.globalLogBeginner.beginLoggingTo(
     [ log_observer, crash_on_critical ]
     )