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# |
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# -*- Perl -*- |
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# $Id: mailnews.pl,v 1.2 2001/11/04 01:17:42 wakaba Exp $ |
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# Copyright (C) 1997-2000 Satoru Takabayashi , |
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# 1999 NOKUBI Takatsugu All rights reserved. |
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# This is free software with ABSOLUTELY NO WARRANTY. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either versions 2, or (at your option) |
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# any later version. |
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# |
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# This program is distributed in the hope that it will be useful |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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# 02111-1307, USA |
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# |
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# This file must be encoded in EUC-JP encoding |
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# |
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|
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package mailnews; |
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use strict; |
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require 'util.pl'; |
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require 'gfilter.pl'; |
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|
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sub mediatype() { |
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return ('message/rfc822', 'message/news'); |
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} |
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|
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sub status() { |
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return 'yes'; |
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} |
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|
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sub recursive() { |
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return 0; |
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} |
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|
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sub pre_codeconv() { |
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return 1; |
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} |
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|
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sub post_codeconv () { |
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return 0; |
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} |
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|
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sub add_magic ($) { |
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my ($magic) = @_; |
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$magic->addFileExts('\\.822$' => 'message/rfc822'); |
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return; |
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} |
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|
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sub filter ($$$$$) { |
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my ($orig_cfile, $cont, $weighted_str, $headings, $fields) |
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= @_; |
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my $cfile = defined $orig_cfile ? $$orig_cfile : ''; |
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|
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util::vprint("Processing mail/news file ...\n"); |
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|
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uuencode_filter($cont); |
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mailnews_filter($cont, $weighted_str, $fields); |
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mailnews_citation_filter($cont, $weighted_str); |
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|
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gfilter::line_adjust_filter($cont); |
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gfilter::line_adjust_filter($weighted_str); |
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gfilter::white_space_adjust_filter($cont); |
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gfilter::white_space_adjust_filter($weighted_str); |
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gfilter::show_filter_debug_info($cont, $weighted_str, |
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$fields, $headings); |
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return undef; |
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} |
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|
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# Original of this code was contributed by <furukawa@tcp-ip.or.jp>. |
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sub mailnews_filter ($$$) { |
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my ($contref, $weighted_str, $fields) = @_; |
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|
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my $boundary = ""; |
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my $line = ""; |
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my $partial = 0; |
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|
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$$contref =~ s/^\s+//; |
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# Don't handle if first like doesn't seem like a mail/news header. |
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return unless $$contref =~ /(^\S+:|^from )/i; |
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|
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my @tmp = split(/\n/, $$contref); |
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HEADER_PROCESSING: |
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while (@tmp) { |
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$line = shift @tmp; |
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last if ($line =~ /^$/); # if an empty line, header is over |
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# Connect the two lines if next line has leading spaces |
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while (defined($tmp[0]) && $tmp[0] =~ /^\s+/) { |
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# if connection is Japanese character, remove spaces |
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# from Furukawa-san's idea [1998-09-22] |
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my $nextline = shift @tmp; |
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$line =~ s/([\xa1-\xfe])\s+$/$1/; |
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$nextline =~ s/^\s+([\xa1-\xfe])/$1/; |
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$line .= $nextline; |
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} |
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|
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# Handle fields. |
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if ($line =~ s/^subject:\s*//i){ |
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$fields->{'title'} = $line; |
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# Skip [foobar-ML:000] for a typical mailing list subject. |
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# Practically skip first [...] for simple implementation. |
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$line =~ s/^\[.*?\]\s*//; |
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|
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# Skip 'Re:' |
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$line =~ s/\bre:\s*//gi; |
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|
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my $weight = $conf::Weight{'html'}->{'title'}; |
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$$weighted_str .= "\x7f$weight\x7f$line\x7f/$weight\x7f\n"; |
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} elsif ($line =~ s/^content-type:\s*//i) { |
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if ($line =~ /multipart.*boundary="(.*)"/i){ |
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$boundary = $1; |
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util::dprint("((boundary: $boundary))\n"); |
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} elsif ($line =~ m!message/partial;\s*(.*)!i) { |
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# The Message/Partial subtype routine [1998-10-12] |
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# contributed by Hiroshi Kato <tumibito@mm.rd.nttdata.co.jp> |
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$partial = $1; |
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util::dprint("((partial: $partial))\n"); |
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} |
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} elsif ($line =~ /^(\S+):\s*(.*)/i) { |
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my $name = $1; |
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my $value = $2; |
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$fields->{lc($name)} = $value; |
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if ($name =~ /^($conf::REMAIN_HEADER)$/io) { |
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# keep some fields specified REMAIN_HEADER for search keyword |
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my $weight = $conf::Weight{'headers'}; |
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$$weighted_str .= |
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"\x7f$weight\x7f$value\x7f/$weight\x7f\n"; |
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} |
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} |
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} |
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if ($partial) { |
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# MHonARC makes several empty lines between header and body, |
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# so remove them. |
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while(@tmp) { |
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last if (! $line =~ /^\s*$/); |
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$line = shift @tmp; |
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} |
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undef $partial; |
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goto HEADER_PROCESSING; |
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} |
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$$contref = join("\n", @tmp); |
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|
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# Handle MIME multipart message. |
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if ($boundary) { |
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$boundary =~ s/(\W)/\\$1/g; |
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$$contref =~ s/This is multipart message.\n//i; |
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|
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|
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# MIME multipart processing, |
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# modified by Furukawa-san's patch on [1998/08/27] |
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$$contref =~ s/--$boundary(--)?\n?/\xff/g; |
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my (@parts) = split(/\xff/, $$contref); |
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$$contref = ''; |
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for $_ (@parts){ |
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if (s/^(.*?\n\n)//s){ |
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my ($head) = $1; |
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$$contref .= $_ if $head =~ m!^content-type:.*text/plain!mi; |
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} |
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} |
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} |
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} |
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|
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# Make mail/news citation marks not to be indexed. |
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# And a greeting message at the beginning. |
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# And a meaningless message such as "foo wrote:". |
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# Thanks to Akira Yamada for great idea. |
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sub mailnews_citation_filter ($$) { |
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my ($contref, $weighted_str) = @_; |
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|
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my $omake = ""; |
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$$contref =~ s/^\s+//; |
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my @tmp = split(/\n/, $$contref); |
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$$contref = ""; |
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|
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# Greeting at the beginning (first one or two lines) |
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for (my $i = 0; $i < 2 && defined($tmp[$i]); $i++) { |
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if ($tmp[$i] =~ /(^\s*((([\xa1-\xfe][\xa1-\xfe]){1,8}|([\x21-\x7e]{1,16}))\s*(。|．|\.|，|,|、|\@|＠|の)\s*){0,2}\s*(([\xa1-\xfe][\xa1-\xfe]){1,8}|([\x21-\x7e]{1,16}))\s*(です|と申します|ともうします|といいます)(.{0,2})?\s*$)/) { |
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# for searching debug info by perl -n00e 'print if /^<<<</' |
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util::dprint("\n\n<<<<$tmp[$i]>>>>\n\n"); |
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$omake .= $tmp[$i] . "\n"; |
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$tmp[$i] = ""; |
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} |
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} |
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|
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# Isolate citation parts. |
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for my $line (@tmp) { |
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# Don't do that if there is an HTML tag at first. |
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if ($line !~ /^[^>]*</ && |
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$line =~ s/^((\S{1,10}>)|(\s*[\>\|\:\#]+\s*))+//) { |
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$omake .= $line . "\n"; |
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$$contref .= "\n"; # Insert LF. |
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next; |
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} |
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$$contref .= $line. "\n"; |
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} |
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|
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# Process text as chunks of paragraphs. |
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# Isolate meaningless message such as "foo wrote:". |
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@tmp = split(/\n\n+/, $$contref); |
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$$contref = ""; |
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my $i = 0; |
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for my $line (@tmp) { |
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# Complete excluding is impossible. I tnink it's good enough. |
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# Process only first five paragrahs. |
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# And don't handle the paragrah which has five or longer lines. |
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# Hmm, this regex looks very hairly. |
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if ($i < 5 && ($line =~ tr/\n/\n/) <= 5 && $line =~ /(^\s*(Date:|Subject:|Message-ID:|From:|件名|差出人|日時))|(^.+(返事です|reply\s*です|曰く|いわく|書きました|言いました|話で|wrote|said|writes|says)(.{0,2})?\s*$)|(^.*In .*(article|message))|(<\S+\@([\w\-.]\.)+\w+>)/im) { |
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util::dprint("\n\n<<<<$line>>>>\n\n"); |
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$omake .= $line . "\n"; |
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$line = ""; |
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next; |
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} |
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$$contref .= $line. "\n\n"; |
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$i++; |
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} |
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$$weighted_str .= "\x7f1\x7f$omake\x7f/1\x7f\n"; |
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} |
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|
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# Skip uuencode and BinHex texts. |
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# Original of this code was contributed by <furukawa@tcp-ip.or.jp>. |
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sub uuencode_filter ($) { |
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my ($content) = @_; |
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my @tmp = split(/\n/, $$content); |
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$$content = ""; |
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|
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my $uuin = 0; |
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while (@tmp) { |
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my $line = shift @tmp; |
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$line .= "\n"; |
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|
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# Skip BinHex texts. |
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# All lines will be skipped. |
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last if $line =~ /^\(This file must be converted with BinHex/; #) |
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|
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# Skip uuencode texts. |
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# References : SunOS 4.1.4: man 5 uuencode |
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# FreeBSD 2.2: uuencode.c |
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# For avoiding accidental matching, check a format. |
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# |
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# There are many netnews messages which is separated into several |
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# files. This kind of files has usually no "begin" line. |
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# This function handle them as well. |
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# |
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# There are two fashion for line length 62 and 63. |
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# This function handle both. |
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# |
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# In the case of following the specification strictly, |
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# int((ord($line) - ord(' ') + 2) / 3) |
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# != (length($line) - 2) / 4 |
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# but it can be transformed into a simple equation. |
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# 4 * int(ord($line) / 3) != length($line) + $uunumb; |
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|
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# Hey, SunOS's uuencode use SPACE for encoding. |
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# But allowing SPACE is dangerous for misrecognizing. |
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# For compromise, only the following case are acceptable. |
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# 1. inside of begin - end |
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# 2. previous line is recognized as uuencoded line |
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# and ord is identical with previous one. |
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|
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# a line consists of only characters of 0x20-0x60 is recognized |
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# as uuencoded line. v1.1.2.3 (bug fix) |
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|
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$uuin = 1, next if $line =~ /^begin [0-7]{3,4} \S+$/; |
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if ($line =~ /^end$/){ |
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$uuin = 0,next if $uuin; |
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} else { |
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# Restrict ord value in range of 32-95. |
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my $uuord = ord($line); |
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$uuord = 32 if $uuord == 96; |
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|
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# if the line of uunumb = 38 is over this loop, |
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# a normal line of 63 length can be ruined accidentaly. |
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my $uunumb = (length($line)==63)? 37: 38; |
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|
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if ((32 <= $uuord && $uuord < 96) && |
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length($line) <= 63 && |
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(4 * int($uuord / 3) == length($line) + $uunumb)){ |
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|
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if ($uuin == 1 || $uuin == $uuord){ |
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next if $line =~ /^[\x20-\x60]+$/; |
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} else { |
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# Be strict for files which doesn't begin with "begin". |
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$uuin = $uuord, next if $line =~ /^M[\x21-\x60]+$/; |
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} |
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} |
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} |
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$uuin = 0; |
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$$content .= $line; |
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} |
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} |
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|
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