3 # AttachCheck -- A MTA wrapper to help check outgoing email for
4 # forgotten attachments.
6 # (c) 2004-2009 -- Benjamin Mako Hill <mako@atdot.cc>
7 # Software Homepage at: http://mako.cc/projects/attachcheck
9 # This program is free software: you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation, either version 3 of the License, or (at
12 # your option) any later version.
14 # This program is distributed in the hope that it will be useful, but
15 # WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 # General Public License for more details.
19 # You should have received a copy of the GNU General Public License
20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22 __copyright__ = "Copyright (c) 2004-2009 Benjamin Mako Hill"
23 __author__ = "Benjamin Mako Hill <mako@atdot.cc>"
25 ### Configuration Options
26 ###########################################
28 # location of the sendmail binary
29 sendmail = "/usr/sbin/sendmail"
31 # list of mimetype which are, for the sake of this program, not
33 ignored_types = ( "applica/pgp-signat", "application/pgp-signature" )
35 # list of regular expressions which we will view as being indicative
37 attachment_regexes = [ r'\battach(ed|ment|ing)?\b(?im)',
38 r'\balleg(o|at[oaie]|ando)(?im)' ]
40 # ignore quoted text (which might refer to attachments in previous emails)
41 attachment_regexes = [ r'(^|^[^\n>].*)' + x for x in attachment_regexes ]
43 ### No Edit Below This Line
44 ###########################################
56 # construct the sendmail pipe more safely (thanks iain murray!)
60 from subprocess import Popen, PIPE
61 mailpipe = Popen(cmd, stdin=PIPE).stdin
62 mailpipe.write( message_string )
63 sys.exit( mailpipe.close() )
65 ## SUB: print error message
68 """(Your message mentions attachments but does not include any.
72 (1) Add an attachment or add \"CONFIRM\" (in ALLCAPS to beginning of
73 the subject of the message and resend. \"CONFIRM\" will be
74 stripped from your message subject befor the message is sent.
77 (2) Add a \"X-AttachCheck-Override: Yes\" header the message.
79 Read the documentation for AttachCheck for more details."""
81 # get the mail from stdin
82 message_string = sys.stdin.read()
83 message = email.message_from_string( message_string )
85 attachment_expected = False
86 attachment_seen = False
89 for part in message.walk():
91 # check to see if this part is a plain text entry
92 if part.get_content_type() == "text/plain":
94 # if this is the second text block, we should interrate
97 attachment_seen = True
98 # otherwise, mark that we've now seen one text field
102 # search for the word "attach" or "attached" or "attachment"
103 # in the body of the message
104 for regex in attachment_regexes:
106 if re.search( regex, part.get_payload() ):
107 attachment_expected = True
109 # check to see if this mime-type is something we can ignore
110 elif ( re.match( r'message/(?m)', part.get_content_type() ) or
111 re.match( r'multipart/(?m)', part.get_content_type() ) or
112 part.get_content_type() in ignored_types ):
115 # if it's not text and it's an ignored type, it's a seen attachment
117 attachment_seen = True
119 # now check to see if we are expecting an attachment
120 if attachment_expected:
122 # if we are expecting an attachment and we've seen one, we should
123 # send the file and be done with things
127 # if we are expected have not seen it, we need to check to see if
128 # the mail has been confirmed
131 # check for the confirmation
133 if re.search( r'Subject: CONFIRM', message_string ):
134 message_string = re.sub( r'(Subject: )(CONFIRM )(.*?)\n',
135 r'\1\3\n', message_string )
138 elif message.get( 'X-AttachCheck-Override' ) == "Yes":
146 # if we are not expecting anything more, we should send the message