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|
#! @PERL@ -w
# RFCs important for this script:
#
# RFC 2822 - Internet Message Format
# RFC 2047 - MIME (Multipurpose Internet Mail Extensions) Part Three:
# Message Header Extensions for Non-ASCII Text
use Getopt::Long;
use strict;
# This ugly trick lets the script work even if gettext support is missing.
# We did so because Locale::gettext doesn't ship with the standard perl
# distribution.
BEGIN {
if (eval { require Locale::gettext }) {
import Locale::gettext;
require POSIX;
import POSIX, qw(setlocale);
} else {
eval '
use constant LC_MESSAGES => 0;
sub setlocale($$) { }
sub bindtextdomain($$) { }
sub textdomain($) { }
sub gettext($) { shift }
'
}
}
setlocale(LC_MESSAGES, "");
bindtextdomain("quilt", "@LOCALEDIR@");
textdomain("quilt");
sub _($) {
return gettext(shift);
}
my $special = '()<>\[\]:;@\\,"'; # special characters
my $special_dot = "$special."; # special characters + dot
sub check_recipient($);
my (%append_name, %append_value, $remove_empty_headers, %remove_header,
%extract_recipients_from, %replace_name, %replace_value, $charset);
GetOptions('add-recipient=s%' =>
sub {
$append_name{lc $_[1]} = $_[1];
$append_value{lc $_[1]} .= ",\n " . $_[2];
},
'add-good-recipient=s%' =>
sub {
eval { check_recipient($_[2]) };
if ($@) {
chomp $@;
print STDERR "$@; skipping\n";
} else {
$append_name{lc $_[1]} = $_[1];
$append_value{lc $_[1]} .= ",\n " . $_[2];
}
},
'remove-header=s' => sub { $remove_header{lc $_[1]}++ },
'remove-empty-headers' => \$remove_empty_headers,
'replace-header=s%' =>
sub {
$replace_name{lc $_[1]} = $_[1];
$replace_value{lc $_[1]} = $_[2];
},
'extract-recipients=s' => sub { $extract_recipients_from{lc $_[1]} = 1 },
'charset=s' => \$charset)
or exit 1;
my %recipient_headers = map {lc $_ => 1} (@ARGV, keys %append_name);
sub encode_header($) {
my ($word) = @_;
$word =~ s{[^\t\41-\76\100-\176]}{sprintf "=%02X", ord($&)}ge;
return "=?$charset?q?$word?=";
}
# Check for a valid display name
sub check_display_name($) {
my ($display) = @_;
if ($display =~ /^"((?:[^"\\]|\\[^\n\r])*)"/) {
my $quoted = $1;
if ($quoted =~ /[^\t\40-\176]/) {
$display = $quoted;
$display =~ s/\\//;
return encode_header($display);
}
} else {
local $_ = $display;
# The value is not (properly) quoted. Check for invalid characters.
while (/\(/ or /\)/) {
die sprintf(
_("Display name `%s' contains unpaired parentheses\n"), $display)
unless s/\(([^()]*)\)/$1/;
}
if ($display =~ /[^\t\40-\176]/ || $display =~ /[$special_dot]/) {
if ($display =~ /[^\1-\10\13\14\16-\37\40\41\43-\133\135-\177]/) {
return encode_header($display);
} elsif ($display =~ /[$special_dot]/) {
return "\"$display\"";
}
}
}
return $display;
}
# Check for a valid delivery address
sub check_delivery_address($) {
my ($deliver) = @_;
die sprintf(_("Delivery address `%s' is invalid\n"), $deliver)
if $deliver =~ /[ \t]/ or
$deliver =~ /[^ \t\40-\176]/ or
$deliver !~ /^[^$special]+@(\[?)[^$special_dot]+(?:\.[^$special_dot]+)*(\]?)$/ or
(!$1) != (!$2);
return $deliver;
}
sub check_recipient($) {
my ($recipient) = @_;
if ($recipient =~ /^(.*?)\s*<(.+)>$/) {
my $deliver = check_delivery_address($2);
return ( check_display_name($1) . " <" . $deliver . ">", $deliver );
} elsif ($recipient =~ /^(\S*)\s*\((.*)\)$/) {
my $deliver = check_delivery_address($1);
return ( $deliver . " (" . check_display_name($2) . ")", $deliver );
} else {
my $deliver = check_delivery_address($recipient);
return ( $deliver, $deliver );
}
}
sub split_recipients($) {
my ($recipients) = @_;
my @list = ();
while ($recipients !~ /^\s*$/) {
my $recipient;
if ($recipients =~ s/^\s*,?\s*((?:"(?:[^"]+)"|[^",])*)//) {
$recipient = $1;
} else {
$recipient = $recipients;
$recipients = "";
}
$recipient =~ s/\s*$//;
push @list, $recipient;
}
return @list;
}
my %recipients;
sub process_header($) {
local ($_) = @_;
my ($name, $value);
return unless defined $_;
unless (($name, $value) = /^([\41-\176]+):\s*(.*)/s) {
print;
return
}
if (%extract_recipients_from) {
if (exists $extract_recipients_from{lc $name}) {
$value =~ s/^\s*//; $value =~ s/\s*$//;
foreach my $recipient (split_recipients($value)) {
my $deliver;
($recipient, $deliver) = check_recipient($recipient);
print "$deliver\n";
}
}
return;
}
return if exists $remove_header{lc $name};
if (exists $replace_name{lc $name}) {
if (exists $replace_value{lc $name}) {
print "$replace_name{lc $name}: $replace_value{lc $name}\n";
delete $replace_value{lc $name};
}
return;
}
if (exists $recipient_headers{lc $1}) {
if (exists $append_name{lc $name}) {
$value .= $append_value{lc $name};
delete $append_name{lc $name};
}
my @recipients;
# This is a recipients field. Split out all the recipients and
# check the addresses. Suppress duplicate recipients.
foreach my $recipient (split_recipients($value)) {
my $deliver;
($recipient, $deliver) = check_recipient($recipient);
unless (exists $recipients{$deliver}) {
push @recipients, $recipient;
$recipients{$deliver} = $deliver;
}
}
print "$name: ", join(",\n ", @recipients), "\n"
if @recipients || !$remove_empty_headers;
} else {
print if $value ne "" || !$remove_empty_headers;
}
}
my $header;
while (<STDIN>) {
last if (/^$/);
if (/^\S/) {
process_header $header;
undef $header;
}
$header .= $_;
}
process_header $header;
foreach my $name (keys %append_name) {
process_header $append_name{$name} . ': ' . $append_value{$name};
}
unless (%extract_recipients_from) {
# Copy the message body to standard output
# FIXME check for 7-bit clean, else assume $charset
# FIXME if UTF-8, check for invalid characters!
# FIXME must make sure that all messages are written in
# either 7-bit or $charset => mbox !!!
# Content-Transfer-Encoding: 7bit
# Content-Transfer-Encoding: 8bit
# Content-Type: text/plain; charset=ISO-8859-15
# Content-Type: text/plain; charset=UTF-8
undef $/;
print "\n", <STDIN>;
}
|
