From: Magnus Hagander <magnus@hagander.net>
Date: Thu, 21 Feb 2013 15:57:29 +0000 (+0100)
Subject: Add varnish purger trigger
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=c6344ebe1c5956be287b80351f1d849d65076983;p=pggit.git

Add varnish purger trigger
---

diff --git a/triggers.py b/triggers.py
index 97a347e..c4cf334 100644
--- a/triggers.py
+++ b/triggers.py
@@ -4,3 +4,42 @@ class test(object):
 
 	def pushtrigger(self, reponame, username):
 		print "Firing push trigger for repository '%s', due to push by %s" % (reponame, username)
+
+
+import httplib
+
+class varnishpurger(object):
+	"""
+	Push trigger that purges repositories from varnish. The idea being that
+	the repositories follow a standard gitweb url structure, and we purge
+	all pages related to that repository.
+
+	Requires the config variable "host" set in the section "varnishpurge".
+	This can be an IP address (typically 127.0.0.1) or IP address + port
+	(typically 127.0.0.1:81). The trigger will always post to the URL
+	"/varnish-purge-url", and will include the URL to purge in the form of
+	a regular expression in the custom header X-Purge-URL.
+	"""
+	def __init__(self, cfg):
+		self.host = cfg.get('varnishpurge', 'host')
+
+	def pushtrigger(self, reponame, username):
+		# Make a callback to a local varnish server to purge a repository
+		# from it. Assumes gitweb style URLs.
+		for u in ['^/gitweb$', '^/gitweb/?p=%s.git' % reponame]:
+			if not self._internal_purge(u):
+				print "Varnish purge failed, website may become slightly out of date"
+				return
+
+
+	def _internal_purge(self, url):
+		try:
+			conn = httplib.HTTPConnection(self.host)
+			conn.request("GET", "/varnish-purge-url", '', {'X-Purge-URL': url})
+			resp = conn.getresponse()
+			conn.close()
+			if resp.status == 200:
+				return True
+			return False
+		except Exception, ex:
+			return False