remail: Use email.utils.get_addresses()

Replace more historical homebrewn parsing

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

remail/mail.py

@@ -5,7 +5,7 @@
 # Mail message related code
 
 from email.utils import make_msgid, formatdate, parseaddr
-from email.header import Header, decode_header
+from email.header import Header
 from email import message_from_string, message_from_bytes
 from email.generator import Generator
 from email.message import Message, EmailMessage
@@ -152,37 +152,6 @@ def get_raw_email_addr(addr):
     '''
     return parseaddr(addr)[1]
 
-re_compress_space = re.compile('\s+')
-
-def decode_hdr(hdr):
-    '''
-    Decode a mail header with encoding
-    '''
-    elm = decode_header(hdr.strip())
-    res = ''
-    for txt, enc in elm:
-        # Groan ....
-        if enc:
-            res += ' ' + txt.decode(enc)
-        elif isinstance(txt, str):
-            res += ' ' + txt
-        else:
-            res += ' ' + txt.decode('ascii')
-    return re_compress_space.sub(' ', res).strip()
-
-def decode_addrs(hdr):
-    '''
-    Decode mail addresses from a header and handle encondings
-    '''
-    addrs = []
-    if not hdr:
-        return addrs
-    parts = re_compress_space.sub(' ', hdr).split(',')
-    for p in parts:
-        addr = decode_hdr(p)
-        addrs.append(addr)
-    return addrs
-
 re_noquote = re.compile('[a-zA-Z0-9_\- ]+')
 
 def encode_addr(fulladdr):

remail/maillist.py

@@ -6,15 +6,15 @@
 
 from remail.mail import msg_set_header, msg_force_msg_id, send_mail
 from remail.mail import msg_sanitize_incoming, msg_is_autoreply
-from remail.mail import get_raw_email_addr, decode_addrs
 from remail.mail import msg_from_string, sender_info
+from remail.mail import get_raw_email_addr
 
 from remail.smime import smime_crypt, RemailSmimeException
 from remail.gpg import gpg_crypt, RemailGPGException
 from remail.tracking import account_tracking
 from remail.config import accounts_config, gpg_config, smime_config
 
-from email.utils import make_msgid, formatdate
+from email.utils import make_msgid, formatdate, getaddresses
 from email.policy import EmailPolicy
 from flufl.bounce import all_failures
 
@@ -303,10 +303,8 @@ class maillist(object):
 
     def get_destination(self, msg):
         # Handle the case where someone put several addresses on To:
-        addrs = decode_addrs(msg['To'])
 
-        for addr in addrs:
-            to = get_raw_email_addr(addr)
+        for name, to in getaddresses(msg.get_all('To', [])):
             dest = self.config.listaddrs.get_destination(to, self.config.admins,
                                                          self.config.subscribers)
             if dest: