about summary refs log tree commit
path: root/lib/PublicInbox/WwwStream.pm
blob: d79770ed1d82b8dbd484ca84dbf445962116bef8 (plain)
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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
# Copyright (C) 2016-2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# HTML body stream for which yields getline+close methods for
# generic PSGI servers and callbacks for public-inbox-httpd.
#
# See PublicInbox::GzipFilter parent class for more info.
package PublicInbox::WwwStream;
use strict;
use parent qw(Exporter PublicInbox::GzipFilter);
our @EXPORT_OK = qw(html_oneshot);
use bytes (); # length
use PublicInbox::Hval qw(ascii_html prurl);
our $TOR_URL = 'https://www.torproject.org/';
our $CODE_URL = 'https://public-inbox.org/public-inbox.git';

sub base_url ($) {
	my $ctx = shift;
	my $base_url = $ctx->{-inbox}->base_url($ctx->{env});
	chop $base_url; # no trailing slash for clone
	$base_url;
}

sub init {
	my ($ctx, $cb) = @_;
	$ctx->{cb} = $cb;
	$ctx->{base_url} = base_url($ctx);
	bless $ctx, __PACKAGE__;
}

sub async_eml { # for async_blob_cb
	my ($ctx, $eml) = @_;
	$ctx->{http_out}->write($ctx->translate($ctx->{cb}->($ctx, $eml)));
}

sub html_top ($) {
	my ($ctx) = @_;
	my $ibx = $ctx->{-inbox};
	my $desc = ascii_html($ibx->description);
	my $title = delete($ctx->{-title_html}) // $desc;
	my $upfx = $ctx->{-upfx} || '';
	my $help = $upfx.'_/text/help';
	my $color = $upfx.'_/text/color';
	my $atom = $ctx->{-atom} || $upfx.'new.atom';
	my $top = "<b>$desc</b>";
	my $links = "<a\nhref=\"$help\">help</a> / ".
			"<a\nhref=\"$color\">color</a> / ".
			"<a\nhref=\"$atom\">Atom feed</a>";
	if ($ibx->search) {
		my $q_val = delete($ctx->{-q_value_html}) // '';
		$q_val = qq(\nvalue="$q_val") if $q_val ne '';
		# XXX gross, for SearchView.pm
		my $extra = delete($ctx->{-extra_form_html}) // '';
		my $action = $upfx eq '' ? './' : $upfx;
		$top = qq{<form\naction="$action"><pre>$top} .
			  qq{\n<input\nname=q\ntype=text$q_val />} .
			  $extra .
			  qq{<input\ntype=submit\nvalue=search />} .
			  ' ' . $links .
			  q{</pre></form>}
	} else {
		$top = '<pre>' . $top . "\n" . $links . '</pre>';
	}
	"<html><head><title>$title</title>" .
		qq(<link\nrel=alternate\ntitle="Atom feed"\n).
		qq(href="$atom"\ntype="application/atom+xml"/>) .
	        $ctx->{www}->style($upfx) .
		'</head><body>'. $top . (delete($ctx->{-html_tip}) // '');
}

sub code_footer ($) {
	my ($env) = @_;
	my $u = prurl($env, $CODE_URL);
	qq(AGPL code for this site: git clone <a\nhref="$u">$u</a>)
}

sub _html_end {
	my ($ctx) = @_;
	my $urls = 'Archives are clonable:';
	my $ibx = $ctx->{-inbox};
	my $desc = ascii_html($ibx->description);

	my @urls;
	my $http = $ctx->{base_url};
	my $max = $ibx->max_git_epoch;
	my $dir = (split(m!/!, $http))[-1];
	my %seen = ($http => 1);
	if (defined($max)) { # v2
		for my $i (0..$max) {
			# old parts my be deleted:
			-d "$ibx->{inboxdir}/git/$i.git" or next;
			my $url = "$http/$i";
			$seen{$url} = 1;
			push @urls, "$url $dir/git/$i.git";
		}
	} else { # v1
		push @urls, $http;
	}

	# FIXME: epoch splits can be different in other repositories,
	# use the "cloneurl" file as-is for now:
	foreach my $u (@{$ibx->cloneurl}) {
		next if $seen{$u}++;
		push @urls, $u =~ /\Ahttps?:/ ? qq(<a\nhref="$u">$u</a>) : $u;
	}

	if (defined($max) || scalar(@urls) > 1) {
		$urls .= "\n" .
			join("\n", map { "\tgit clone --mirror $_" } @urls);
	} else {
		$urls .= " git clone --mirror $urls[0]";
	}
	if (defined $max) {
		my $addrs = $ibx->{address};
		$addrs = join(' ', @$addrs) if ref($addrs) eq 'ARRAY';
		$urls .=  <<EOF


	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 $ibx->{name} $dir/ $http \\
		$addrs
	public-inbox-index $dir
EOF
	} else { # v1
		$urls .= "\n";
	}

	my $cfg_link = ($ctx->{-upfx} // '').'_/text/config/raw';
	$urls .= qq(\nExample <a\nhref="$cfg_link">config snippet</a> for mirrors\n);
	my @nntp = map { qq(<a\nhref="$_">$_</a>) } @{$ibx->nntp_url};
	if (@nntp) {
		$urls .= "\n";
		$urls .= @nntp == 1 ? 'Newsgroup' : 'Newsgroups are';
		$urls .= ' available over NNTP:';
		$urls .= "\n\t" . join("\n\t", @nntp) . "\n";
	}
	if ($urls =~ m!\b[^:]+://\w+\.onion/!) {
		$urls .= "\n note: .onion URLs require Tor: ";
		$urls .= qq[<a\nhref="$TOR_URL">$TOR_URL</a>];
	}
	'<hr><pre>'.join("\n\n",
		$desc,
		$urls,
		code_footer($ctx->{env})
	).'</pre></body></html>';
}

# callback for HTTP.pm (and any other PSGI servers)
sub getline {
	my ($ctx) = @_;
	my $cb = $ctx->{cb} or return;
	while (defined(my $x = $cb->($ctx))) { # x = smsg or scalar non-ref
		if (ref($x)) { # smsg
			my $eml = $ctx->{-inbox}->smsg_eml($x) or next;
			$ctx->{smsg} = $x;
			return $ctx->translate($cb->($ctx, $eml));
		} else { # scalar
			return $ctx->translate($x);
		}
	}
	delete $ctx->{cb};
	$ctx->zflush(_html_end($ctx));
}

sub html_oneshot ($$;$) {
	my ($ctx, $code, $sref) = @_;
	my $res_hdr = [ 'Content-Type' => 'text/html; charset=UTF-8',
		'Content-Length' => undef ];
	bless $ctx, __PACKAGE__;
	$ctx->{gz} = PublicInbox::GzipFilter::gz_or_noop($res_hdr, $ctx->{env});
	$ctx->{base_url} //= do {
		$ctx->zmore(html_top($ctx));
		base_url($ctx);
	};
	$ctx->zmore($$sref) if $sref;
	my $bdy = $ctx->zflush(_html_end($ctx));
	$res_hdr->[3] = bytes::length($bdy);
	[ $code, $res_hdr, [ $bdy ] ]
}

sub async_next ($) {
	my ($http) = @_; # PublicInbox::HTTP
	my $ctx = $http->{forward} or return;
	eval {
		if (my $smsg = $ctx->{smsg} = $ctx->{cb}->($ctx)) {
			$ctx->smsg_blob($smsg);
		} else {
			$ctx->{http_out}->write(
					$ctx->translate(_html_end($ctx)));
			$ctx->close; # GzipFilter->close
		}
	};
	warn "E: $@" if $@;
}

sub aresponse {
	my ($ctx, $code, $cb) = @_;
	my $res_hdr = [ 'Content-Type' => 'text/html; charset=UTF-8' ];
	init($ctx, $cb);
	$ctx->psgi_response($code, $res_hdr);
}

1;