public-inbox.git  about / heads / tags
an "archives first" approach to mailing lists
blob 6cfc6c322295d2f6f3515de38db75e48e0dfff25 4709 bytes (raw)
$ git show repobrowse:lib/PublicInbox/ExtMsg.pm	# shows this blob on the CLI

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
 
# Copyright (C) 2015 all contributors <meta@public-inbox.org>
# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
#
# Used by the web interface to link to messages outside of the our
# public-inboxes.  Mail threads may cross projects/threads; so
# we should ensure users can find more easily find them on other
# sites.
package PublicInbox::ExtMsg;
use strict;
use warnings;
use PublicInbox::Hval;
use PublicInbox::MID qw/mid2path/;
use PublicInbox::WwwStream;

# TODO: user-configurable
our @EXT_URL = (
	# leading "//" denotes protocol-relative (http:// or https://)
	'//marc.info/?i=%s',
	'//www.mail-archive.com/search?l=mid&q=%s',
	'http://mid.gmane.org/%s',
	'https://lists.debian.org/msgid-search/%s',
	'//docs.FreeBSD.org/cgi/mid.cgi?db=mid&id=%s',
	'https://www.w3.org/mid/%s',
	'http://www.postgresql.org/message-id/%s',
	'https://lists.debconf.org/cgi-lurker/keyword.cgi?'.
		'doc-url=/lurker&format=en.html&query=id:%s'
);

sub ext_msg {
	my ($ctx) = @_;
	my $cur = $ctx->{-inbox};
	my $mid = $ctx->{mid};

	eval { require PublicInbox::Search };
	my $have_xap = $@ ? 0 : 1;
	my (@nox, @ibx, @found);

	$ctx->{www}->{pi_config}->each_inbox(sub {
		my ($other) = @_;
		return if $other->{name} eq $cur->{name} || !$other->base_url;

		my $s = $other->search;
		if (!$s) {
			push @nox, $other;
			return;
		}

		# try to find the URL with Xapian to avoid forking
		my $doc_id = eval { $s->find_unique_doc_id('mid', $mid) };
		if ($@) {
			# xapian not configured properly for this repo
			push @nox, $other;
			return;
		}

		# maybe we found it!
		if (defined $doc_id) {
			push @found, $other;
		} else {
			# no point in trying the fork fallback if we
			# know Xapian is up-to-date but missing the
			# message in the current repo
			push @ibx, $other;
		}
	});

	return exact($ctx, \@found, $mid) if @found;

	# Xapian not installed or configured for some repos,
	# do a full MID check (this is expensive...):
	if (@nox) {
		my $path = mid2path($mid);
		foreach my $other (@nox) {
			my (undef, $type, undef) = $other->path_check($path);

			if ($type && $type eq 'blob') {
				push @found, $other;
			}
		}
	}
	return exact($ctx, \@found, $mid) if @found;

	# fall back to partial MID matching
	my $n_partial = 0;
	my @partial;

	eval { require PublicInbox::Msgmap };
	my $have_mm = $@ ? 0 : 1;
	if ($have_mm) {
		my $tmp_mid = $mid;
again:
		unshift @ibx, $cur;
		foreach my $ibx (@ibx) {
			my $mm = $ibx->mm or next;
			if (my $res = $mm->mid_prefixes($tmp_mid)) {
				$n_partial += scalar(@$res);
				push @partial, [ $ibx, $res ];
			}
		}
		# fixup common errors:
		if (!$n_partial && $tmp_mid =~ s,/[tTf],,) {
			goto again;
		}
	}

	my $code = 404;
	my $h = PublicInbox::Hval->new_msgid($mid);
	my $href = $h->{href};
	my $html = $h->as_html;
	my $title = "&lt;$html&gt; not found";
	my $s = "<pre>Message-ID &lt;$html&gt;\nnot found\n";
	if ($n_partial) {
		$code = 300;
		my $es = $n_partial == 1 ? '' : 'es';
		$s .= "\n$n_partial partial match$es found:\n\n";
		my $cur_name = $cur->{name};
		foreach my $pair (@partial) {
			my ($ibx, $res) = @$pair;
			my $env = $ctx->{env} if $ibx->{name} eq $cur_name;
			my $u = $ibx->base_url($env) or next;
			foreach my $m (@$res) {
				my $p = PublicInbox::Hval->new_msgid($m);
				my $r = $p->{href};
				my $t = $p->as_html;
				$s .= qq{<a\nhref="$u$r/">$u$t/</a>\n};
			}
		}
	}
	my $ext = ext_urls($ctx, $mid, $href, $html);
	if ($ext ne '') {
		$s .= $ext;
		$code = 300;
	}
	$ctx->{-html_tip} = $s .= '</pre>';
	$ctx->{-title_html} = $title;
	$ctx->{-upfx} = '../';
	PublicInbox::WwwStream->response($ctx, $code);
}

sub ext_urls {
	my ($ctx, $mid, $href, $html) = @_;

	# Fall back to external repos if configured
	if (@EXT_URL && index($mid, '@') >= 0) {
		my $env = $ctx->{env};
		my $e = "\nPerhaps try an external site:\n\n";
		foreach my $url (@EXT_URL) {
			my $u = PublicInbox::Hval::prurl($env, $url);
			my $r = sprintf($u, $href);
			my $t = sprintf($u, $html);
			$e .= qq{<a\nhref="$r">$t</a>\n};
		}
		return $e;
	}
	''
}

sub exact {
	my ($ctx, $found, $mid) = @_;
	my $h = PublicInbox::Hval->new_msgid($mid);
	my $href = $h->{href};
	my $html = $h->as_html;
	my $title = "&lt;$html&gt; found in ";
	my $end = @$found == 1 ? 'another inbox' : 'other inboxes';
	$ctx->{-title_html} = $title . $end;
	$ctx->{-upfx} = '../';
	my $ext_urls = ext_urls($ctx, $mid, $href, $html);
	my $code = (@$found == 1 && $ext_urls eq '') ? 200 : 300;
	$ctx->{-html_tip} = join('',
			"<pre>Message-ID: &lt;$html&gt;\nfound in $end:\n\n",
				(map {
					my $u = $_->base_url;
					qq(<a\nhref="$u$href/">$u$html/</a>\n)
				} @$found),
			$ext_urls, '</pre>');
	PublicInbox::WwwStream->response($ctx, $code);
}

1;

git clone https://public-inbox.org/public-inbox.git
git clone http://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/public-inbox.git