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import dbus
def is_address_valid(addr):
"""
Validate e-mail addresses based on lexical rules set forth in RFC 822
Ported from Recipe 3.9 in Secure Programming Cookbook for C and C++ by
John Viega and Matt Messier (O'Reilly 2003)
"""
# Mail variables
rfc822_specials = '()<>@,;:\\"[]'
c = 0
while c < len(addr):
if addr[c] == '"' and (not c or addr[c - 1] == '.' or addr[c - - 1] == '"'):
c = c + 1
while c < len(addr):
if addr[c] == '"': break
if addr[c] == '\\' and addr[c + 1] == ' ':
c = c + 2
continue
if ord(addr[c]) < 32 or ord(addr[c]) >= 127: return 0
c = c + 1
else: return 0
if addr[c] == '@': break
if addr[c] != '.': return 0
c = c + 1
continue
if addr[c] == '@': break
if ord(addr[c]) <= 32 or ord(addr[c]) >= 127: return 0
if addr[c] in rfc822_specials: return 0
c = c + 1
if not c or addr[c - 1] == '.': return 0
# Next we validate the domain portion (name at domain)
domain = c = c + 1
if domain >= len(addr): return 0
count = 0
while c < len(addr):
if addr[c] == '.':
if c == domain or addr[c - 1] == '.': return 0
count = count + 1
if ord(addr[c]) <= 32 or ord(addr[c]) >= 127: return 0
if addr[c] in rfc822_specials: return 0
c = c + 1
return count >= 1
def flatten(msg):
from email.generator import Generator
from cStringIO import StringIO
fp = StringIO()
g = Generator(fp, mangle_from_=False, maxheaderlen=60)
g.flatten(msg)
flattened_msg = fp.getvalue()
return flattened_msg
def check_online():
'returns True if active network connection, False otherwise'
bus = dbus.SystemBus()
proxy = bus.get_object('org.freedesktop.NetworkManager', '/org/freedesktop/NetworkManager')
return (proxy.state()==3)
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