* [PATCH] examples/unsubscribe.milter: RFC 8058 (List-Unsubscribe=One-Click)
@ 2022-04-02 1:56 Eric Wong
0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2022-04-02 1:56 UTC (permalink / raw)
To: meta
This allows unambiguous signaling to some MUAs and webmail clients
that th List-Unsubscribe header contains an instantaneous
unsubscribe option.
---
Documentation/standards.perl | 4 ++++
examples/unsubscribe.milter | 7 ++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/Documentation/standards.perl b/Documentation/standards.perl
index 32003c91..69568ceb 100755
--- a/Documentation/standards.perl
+++ b/Documentation/standards.perl
@@ -62,6 +62,10 @@ my $rfcs = [
# 8621 => JSON Meta Application Protocol (JMAP) for Mail
# ...
+ # examples/unsubscribe.milter and PublicInbox::Unsubscribe
+ 2369 => 'URLs as Meta-Syntax for Core Mail List Commands',
+ 8058 => 'Signaling One-Click Functionality for List Email Headers',
+
# TODO: flesh this out
];
diff --git a/examples/unsubscribe.milter b/examples/unsubscribe.milter
index 04a39761..216b0ddd 100644
--- a/examples/unsubscribe.milter
+++ b/examples/unsubscribe.milter
@@ -1,5 +1,5 @@
#!/usr/bin/perl -w
-# Copyright (C) 2016-2021 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>
use strict;
use Sendmail::PMilter qw(:all);
@@ -96,6 +96,7 @@ $cbs{eom} = sub {
my $unsub = $priv->{header}->{'list-unsubscribe'} || [];
my $n = 0;
+ my $added;
foreach my $u (@$unsub) {
# Milter indices are 1-based,
# not 0-based like Perl arrays
@@ -114,7 +115,11 @@ $cbs{eom} = sub {
$v .= ",\n <https://$domain/u/$u/$list>";
$ctx->chgheader($k, $index, $v);
+ $added = 1;
}
+ # RFC 8058
+ $added and $ctx->addheader('List-Unsubscribe-Post',
+ 'List-Unsubscribe=One-Click');
};
warn $@ if $@;
SMFIS_CONTINUE;
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2022-04-02 1:56 [PATCH] examples/unsubscribe.milter: RFC 8058 (List-Unsubscribe=One-Click) Eric Wong
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