From 2a54e612382609495b50579c2a75cfb8999aaa8e Mon Sep 17 00:00:00 2001
From: sebres <serg.brester@sebres.de>
Date: Wed, 8 Oct 2014 15:44:32 +0200
Subject: [PATCH] config cache optimized - prevent to read the same config file
 inside different resources multiple times; test case: read jail file only
 once;

---
 fail2ban/client/configparserinc.py     | 40 ++++++++++++++++++++++++--
 fail2ban/tests/clientreadertestcase.py |  6 ++--
 2 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/fail2ban/client/configparserinc.py b/fail2ban/client/configparserinc.py
index ad0a255c..7aac111b 100644
--- a/fail2ban/client/configparserinc.py
+++ b/fail2ban/client/configparserinc.py
@@ -124,7 +124,7 @@ class SafeConfigParserWithIncludes(object):
 		else:
 			fileNamesFull = resource
 		# check cache
-		hashv = '///'.join(fileNamesFull)
+		hashv = '\x01'.join(fileNamesFull)
 		cr, ret, mtime = SCPWI.CFG_CACHE.get(hashv, (None, False, 0))
 		curmt = SCPWI._resource_mtime(fileNamesFull)
 		if cr is not None and mtime == curmt:
@@ -167,7 +167,7 @@ class SafeConfigParserWithIncludes(object):
 		parser = SCPWI()
 		try:
 			# read without includes
-			parser.read(resource, get_includes = False)
+			parser.read(resource, get_includes=False)
 		except UnicodeDecodeError, e:
 			logSys.error("Error decoding config file '%s': %s" % (resource, e))
 			return []
@@ -232,11 +232,45 @@ after = 1.conf
 			super(_SafeConfigParserWithIncludes, self).__init__(
 				*args, **kwargs)
 
+	def get_defaults(self):
+		return self._defaults
+
+	def get_sections(self):
+		return self._sections
 
 	def read(self, filenames):
 		if not isinstance(filenames, list):
 			filenames = [ filenames ]
-		logSys.debug("Reading files: %s", filenames)
+		if len(filenames) > 1:
+			# read multiple configs:
+			ret = []
+			alld = self.get_defaults()
+			alls = self.get_sections()
+			for filename in filenames:
+				# read single one, add to return list:
+				cfg = SafeConfigParserWithIncludes()
+				i = cfg.read(filename, get_includes=False)
+				if i:
+					ret += i
+					# merge defaults and all sections to self:
+					for (n, v) in cfg.get_defaults().items():
+						alld[n] = v
+					for (n, s) in cfg.get_sections().items():
+						if isinstance(s, dict):
+							s2 = alls.get(n)
+							if s2 is not None:
+								for (n, v) in s.items():
+									s2[n] = v
+							else:
+								s2 = s.copy()
+								alls[n] = s2
+						else:
+							alls[n] = s
+
+			return ret
+
+		# read one config :
+		logSys.debug("Reading file: %s", filenames[0])
 		if sys.version_info >= (3,2): # pragma: no cover
 			return SafeConfigParser.read(self, filenames, encoding='utf-8')
 		else:
diff --git a/fail2ban/tests/clientreadertestcase.py b/fail2ban/tests/clientreadertestcase.py
index 68de2e8b..5c5c75bc 100644
--- a/fail2ban/tests/clientreadertestcase.py
+++ b/fail2ban/tests/clientreadertestcase.py
@@ -365,11 +365,11 @@ class JailsReaderTestCache(LogCaptureTestCase):
 			self.assertTrue(configurator.getOptions(None))
 			cnt = 0
 			for s in self.getLog().rsplit('\n'):
-				if re.match(r"^Reading files: .*jail.local", s):
+				if re.match(r"^Reading files?: .*jail.local", s):
 					cnt += 1
-			# if cnt > 2:
+			# if cnt > 1:
 			# 	self.printLog()
-			self.assertFalse(cnt > 2, "Too many times reading of config files, cnt = %s" % cnt)
+			self.assertFalse(cnt > 1, "Too many times reading of config files, cnt = %s" % cnt)
 			self.assertFalse(cnt <= 0)
 		finally:
 			shutil.rmtree(basedir)