+
+ def get_cached_server_version(self, server):
+ # check local cache first
+ cache = None
+ version = None
+ cache_file = os.path.join(self.options.sfi_dir,'sfi_cache.dat')
+ cache_key = server.url + "-version"
+ try:
+ cache = Cache(cache_file)
+ except IOError:
+ cache = Cache()
+ self.logger.info("Local cache not found at: %s" % cache_file)
+
+ if cache:
+ version = cache.get(cache_key)
+
+ if not version:
+ version = server.GetVersion()
+ # cache version for 24 hours
+ cache.add(cache_key, version, ttl= 60*60*24)
+ self.logger.info("Updating cache file %s" % cache_file)
+ cache.save_to_file(cache_file)
+
+
+ return version
+
+
+ def server_supports_call_id_arg(self, server):
+ """
+ Returns true if server support the optional call_id arg, false otherwise.
+ """
+ server_version = self.get_cached_server_version(server)
+ if 'sfa' in server_version and 'code_tag' in server_version:
+ code_tag = server_version['code_tag']
+ code_tag_parts = code_tag.split("-")
+
+ version_parts = code_tag_parts[0].split(".")
+ major, minor = version_parts[0], version_parts[1]
+ rev = code_tag_parts[1]
+ if int(major) > 1:
+ if int(minor) > 0 or int(rev) > 20:
+ return True
+ return False
+