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authorEric Wong <e@yhbt.net>2020-05-10 22:37:12 +0000
committerEric Wong <e@yhbt.net>2020-05-12 06:15:59 +0000
commit098fecd1fe516a00fbfd49622b82be382ebcdab6 (patch)
tree0b38bb0910e6f9b8c3600ba6ef105aac43bafed6 /lib/PublicInbox/ContentId.pm
parentcd8cda10c9687533949a8a358fd7b858f704da6e (diff)
downloadpublic-inbox-098fecd1fe516a00fbfd49622b82be382ebcdab6.tar.gz
The old name may be confused with "Content-ID" as described in
RFC 2392, so use an alternate name to avoid confusing future
readers.
Diffstat (limited to 'lib/PublicInbox/ContentId.pm')
-rw-r--r--lib/PublicInbox/ContentId.pm99
1 files changed, 0 insertions, 99 deletions
diff --git a/lib/PublicInbox/ContentId.pm b/lib/PublicInbox/ContentId.pm
deleted file mode 100644
index 8d77934f..00000000
--- a/lib/PublicInbox/ContentId.pm
+++ /dev/null
@@ -1,99 +0,0 @@
-# Copyright (C) 2018-2020 all contributors <meta@public-inbox.org>
-# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-
-# Unstable internal API.
-# Used for on-the-fly duplicate detection in V2 inboxes.
-# This is not stored in any database anywhere and may change
-# as changes in duplicate detection are needed.
-# See L<public-inbox-v2-format(5)> manpage for more details.
-package PublicInbox::ContentId;
-use strict;
-use warnings;
-use base qw/Exporter/;
-our @EXPORT_OK = qw/content_id content_digest/;
-use PublicInbox::MID qw(mids references);
-use PublicInbox::MsgIter;
-
-# not sure if less-widely supported hash families are worth bothering with
-use Digest::SHA;
-
-sub digest_addr ($$$) {
-        my ($dig, $h, $v) = @_;
-        $v =~ tr/"//d;
-        $v =~ s/@([a-z0-9\_\.\-\(\)]*([A-Z])\S*)/'@'.lc($1)/ge;
-        utf8::encode($v);
-        $dig->add("$h\0$v\0");
-}
-
-sub content_dig_i {
-        my ($dig) = $_[1];
-        my ($part, $depth, @idx) = @{$_[0]};
-        $dig->add("\0$depth:".join('.', @idx)."\0");
-        my $fn = $part->filename;
-        if (defined $fn) {
-                utf8::encode($fn);
-                $dig->add("fn\0$fn\0");
-        }
-        my @d = $part->header('Content-Description');
-        foreach my $d (@d) {
-                utf8::encode($d);
-                $dig->add("d\0$d\0");
-        }
-        $dig->add("b\0");
-        my $ct = $part->content_type || 'text/plain';
-        my ($s, undef) = msg_part_text($part, $ct);
-        if (defined $s) {
-                $s =~ s/\r\n/\n/gs;
-                $s =~ s/\s*\z//s;
-                utf8::encode($s);
-        } else {
-                $s = $part->body;
-        }
-        $dig->add($s);
-}
-
-sub content_digest ($) {
-        my ($mime) = @_;
-        my $dig = Digest::SHA->new(256);
-        my $hdr = $mime->header_obj;
-
-        # References: and In-Reply-To: get used interchangeably
-        # in some "duplicates" in LKML.  We treat them the same
-        # in SearchIdx, so treat them the same for this:
-        # do NOT consider the Message-ID as part of the content_id
-        # if we got here, we've already got Message-ID reuse
-        my %seen = map { $_ => 1 } @{mids($hdr)};
-        foreach my $mid (@{references($hdr)}) {
-                $dig->add("ref\0$mid\0") unless $seen{$mid}++;
-        }
-
-        # Only use Sender: if From is not present
-        foreach my $h (qw(From Sender)) {
-                my @v = $hdr->header($h);
-                if (@v) {
-                        digest_addr($dig, $h, $_) foreach @v;
-                }
-        }
-        foreach my $h (qw(Subject Date)) {
-                my @v = $hdr->header($h);
-                foreach my $v (@v) {
-                        utf8::encode($v);
-                        $dig->add("$h\0$v\0");
-                }
-        }
-        # Some mail processors will add " to unquoted names that were
-        # not in the original message.  For the purposes of deduplication,
-        # do not take it into account:
-        foreach my $h (qw(To Cc)) {
-                my @v = $hdr->header($h);
-                digest_addr($dig, $h, $_) foreach @v;
-        }
-        msg_iter($mime, \&content_dig_i, $dig);
-        $dig;
-}
-
-sub content_id ($) {
-        content_digest($_[0])->digest;
-}
-
-1;