From c1d73107c7a492f261c6b3786427546387e25507 Mon Sep 17 00:00:00 2001
From: Arun Raghavan <ford_prefect@gentoo.org>
Date: Sun, 21 Dec 2008 14:00:55 +0530
Subject: Factor out distfiles/releases checking code. Portage checker en
 route.

---
 check.py | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 check.py

diff --git a/check.py b/check.py
new file mode 100644
index 0000000..1540627
--- /dev/null
+++ b/check.py
@@ -0,0 +1,90 @@
+#!/usr/bin/python
+
+import os
+import urllib2
+import time
+import rfc822
+
+class GardCheck:
+	# Base class which provides some helper functions
+	def __init__(self, url):
+		self.url = url
+
+	# Overridde in child classes
+	def check(self):
+		return True
+
+	def humanize_time(self, secs):
+		mins, secs = divmod(secs, 60)
+		hours, mins = divmod(mins, 60)
+		days, hours = divmod(hours, 24)
+    		return '%02d d %02dh %02d m %02d s' % (days, hours, mins, secs)
+
+	def timestamp_to_secs(self, ts):
+		return rfc822.mktime_tz(rfc822.parsedate_tz(ts))
+
+class DistCheck(GardCheck):
+	# can only be used from Python 2.6 onwards
+	HTTP_TIMEOUT = 30
+
+	# Takes the URL to a timestamp.{chk|x} file and returns the
+	# corresponding time stamp in seconds
+	def _get_timestamp_from_url(self, url):
+		try:
+			f = urllib2.urlopen(url)
+			date = f.read()
+			f.close()
+			if date is None or len(date) == 0:
+				raise ValueError
+			try:
+				# timestamp.chk format
+				ts = self.timestamp_to_secs(date)
+			except:
+				# timestamp.x format?
+				ts = float(date.split(' ')[0])
+		except:
+			print 'ERROR: Could not get timestamp from ' + url
+			return None
+
+		return ts
+
+	def _check_file_exists(self, url):
+		ret = True
+		try:
+			f = urllib2.urlopen(url)
+			if len(f.read()) == 0:
+				raise IOError
+		except:
+			ret = False
+
+		return ret
+
+	def check(self, maxdlag, maxrlag, verbose=False):
+		# XXX: Replace 'verbose' with a logger object
+		ret = True
+
+		# Verify that distfiles aren't lagging
+		now = time.mktime(time.gmtime())
+		ts = self._get_timestamp_from_url(self.url+'/distfiles/timestamp.chk')
+		if ts is not None and ((now - ts) > maxdlag or (now - ts) < 0):
+			if verbose is True:
+				print 'ERROR: distfiles at %s is lagging by %s' \
+						% (self.url, self.humanize_time(now - ts))
+			ret = False
+
+		# Verify that releases aren't lagging
+		ts = self._get_timestamp_from_url(self.url+'/releases/.test/timestamp.x')
+		if ts is not None and ((now - ts) > maxrlag or (now - ts) < 0):
+			if verbose is True:
+				print 'ERROR: releases at %s is lagging by %s seconds' \
+						% (self.url, self.humanize_time(now - ts))
+			ret = False
+
+		# Verify that releases/.test/THIS-FILE-SHOULD-NOT-BE-PUBLIC.txt
+		# is not world readable
+		if self._check_file_exists(self.url+'releases/.test/THIS-FILE-SHOULD-NOT-BE-PUBLIC.txt'):
+			if verbose is True:
+				print 'ERROR: THIS-FILE-SHOULD-NOT-BE-PUBLIC.txt is visible to the outside world'
+			ret = False
+
+		return ret
-- 
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