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-rw-r--r--lib/PublicInbox/ContentId.pm17
1 files changed, 8 insertions, 9 deletions
diff --git a/lib/PublicInbox/ContentId.pm b/lib/PublicInbox/ContentId.pm
index 7ec638ca..d1a009e7 100644
--- a/lib/PublicInbox/ContentId.pm
+++ b/lib/PublicInbox/ContentId.pm
@@ -6,6 +6,7 @@ use strict;
 use warnings;
 use base qw/Exporter/;
 our @EXPORT_OK = qw/content_id/;
+use PublicInbox::MID qw(mids references);
 
 # not sure if less-widely supported hash families are worth bothering with
 use Digest::SHA;
@@ -22,20 +23,18 @@ sub content_id ($;$) {
         # 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:
-        my @mid = $hdr->header_raw('Message-ID');
-        @mid = (join(' ', @mid) =~ /<([^>]+)>/g);
-        my $refs = join(' ', $hdr->header_raw('References'),
-                        $hdr->header_raw('In-Reply-To'));
-        my @refs = ($refs =~ /<([^>]+)>/g);
         my %seen;
-        foreach my $mid (@mid, @refs) {
-                next if $seen{$mid};
-                $dig->add($mid);
+        foreach my $mid (@{mids($hdr)}) {
+                $dig->add('mid: '.$mid);
                 $seen{$mid} = 1;
         }
+        foreach my $mid (@{references($hdr)}) {
+                next if $seen{$mid};
+                $dig->add('ref: '.$mid);
+        }
         foreach my $h (@ID_HEADERS) {
                 my @v = $hdr->header_raw($h);
-                $dig->add($_) foreach @v;
+                $dig->add("$h: $_") foreach @v;
         }
         $dig->add($mime->body_raw);
         'SHA-' . $dig->algorithm . ':' . $dig->hexdigest;