-# Copyright (C) 2018-2020 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# Unstable internal API.
# See L<public-inbox-v2-format(5)> manpage for more details.
package PublicInbox::ContentHash;
use strict;
-use warnings;
-use base qw/Exporter/;
-our @EXPORT_OK = qw/content_hash content_digest/;
+use v5.10.1;
+use parent qw(Exporter);
+our @EXPORT_OK = qw(content_hash content_digest git_sha);
use PublicInbox::MID qw(mids references);
use PublicInbox::MsgIter;
# not sure if less-widely supported hash families are worth bothering with
-use Digest::SHA;
+use PublicInbox::SHA; # faster, but no ->clone
+use Digest::SHA; # we still need this for ->clone
sub digest_addr ($$$) {
my ($dig, $h, $v) = @_;
$v =~ tr/"//d;
+ $v =~ tr/\r\n\t / /s;
$v =~ s/@([a-z0-9\_\.\-\(\)]*([A-Z])\S*)/'@'.lc($1)/ge;
utf8::encode($v);
$dig->add("$h\0$v\0");
$dig->add($s);
}
-sub content_digest ($) {
- my ($mime) = @_;
- my $dig = Digest::SHA->new(256);
- my $hdr = $mime->header_obj;
+sub content_digest ($;$) {
+ my ($eml, $dig) = @_;
+ $dig //= Digest::SHA->new(256);
# 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_hash
# 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}++;
+ my %seen = map { $_ => 1 } @{mids($eml)};
+ for (grep { !$seen{$_}++ } @{references($eml)}) {
+ utf8::encode($_);
+ $dig->add("ref\0$_\0");
}
# 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;
- }
+ my @v = $eml->header($h) or next;
+ digest_addr($dig, $h, $_) foreach @v;
+ last;
}
foreach my $h (qw(Subject Date)) {
- my @v = $hdr->header($h);
+ my @v = $eml->header($h);
foreach my $v (@v) {
utf8::encode($v);
$dig->add("$h\0$v\0");
# 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);
+ my @v = $eml->header($h);
digest_addr($dig, $h, $_) foreach @v;
}
- msg_iter($mime, \&content_dig_i, $dig);
+ msg_iter($eml, \&content_dig_i, $dig);
$dig;
}
sub content_hash ($) {
- content_digest($_[0])->digest;
+ content_digest($_[0], PublicInbox::SHA->new(256))->digest;
+}
+
+# don't clone the result of this
+sub git_sha ($$) {
+ my ($n, $eml) = @_;
+ my $dig = PublicInbox::SHA->new($n);
+ my $bref = ref($eml) eq 'SCALAR' ? $eml : \($eml->as_string);
+ $dig->add('blob '.length($$bref)."\0", $$bref);
+ $dig;
}
1;