More regex fixes

Author: danielwaterworth

pusher/util.py

@@ -8,10 +8,10 @@
 import six
 import sys
 
-channel_name_re = re.compile('^[-a-zA-Z0-9_=@,.;]+$')
-app_id_re       = re.compile('^[0-9]+$')
-pusher_url_re   = re.compile('(http|https)://(.*):(.*)@(.*)/apps/([0-9]+)$')
-socket_id_re    = re.compile('\d+\.\d+$')
+channel_name_re = re.compile('\A[-a-zA-Z0-9_=@,.;]+\Z')
+app_id_re       = re.compile('\A[0-9]+\Z')
+pusher_url_re   = re.compile('\A(http|https)://(.*):(.*)@(.*)/apps/([0-9]+)\Z')
+socket_id_re    = re.compile('\A\d+\.\d+\Z')
 
 if sys.version_info < (3,):
     text = 'a unicode string'