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| | # 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
#
# public-inbox-httpd favors "getline" response bodies to take a
# "pull"-based approach to feeding slow clients (as opposed to a
# more common "push" model)
package PublicInbox::WwwStream;
use strict;
use warnings;
use base qw(Exporter);
our @EXPORT_OK = qw(html_oneshot);
use bytes (); # length
use PublicInbox::Hval qw(ascii_html prurl);
use Compress::Raw::Zlib qw(Z_FINISH Z_OK);
use PublicInbox::GzipFilter qw(gzip_maybe);
our $TOR_URL = 'https://www.torproject.org/';
our $CODE_URL = 'https://public-inbox.org/public-inbox.git';
# noop for HTTP.pm (and any other PSGI servers)
sub close {}
sub base_url ($) {
my $ctx = shift;
my $base_url = $ctx->{-inbox}->base_url($ctx->{env});
chop $base_url; # no trailing slash for clone
$base_url;
}
sub new {
my ($class, $ctx, $cb) = @_;
bless {
nr => 0,
cb => $cb,
ctx => $ctx,
base_url => base_url($ctx),
}, $class;
}
sub response {
my ($class, $ctx, $code, $cb) = @_;
[ $code, [ 'Content-Type', 'text/html; charset=UTF-8' ],
$class->new($ctx, $cb) ]
}
sub _html_top ($) {
my ($self) = @_;
my $ctx = $self->{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">$u</a>)
}
sub _html_end {
my ($self) = @_;
my $urls = 'Archives are clonable:';
my $ctx = $self->{ctx};
my $ibx = $ctx->{-inbox};
my $desc = ascii_html($ibx->description);
my @urls;
my $http = $self->{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 ($self) = @_;
my $nr = $self->{nr}++;
return _html_top($self) if $nr == 0;
if (my $middle = $self->{cb}) {
$middle = $middle->($nr, $self->{ctx}) and return $middle;
}
delete $self->{cb} ? _html_end($self) : undef;
}
sub html_oneshot ($$;$) {
my ($ctx, $code, $sref) = @_;
my $self = bless {
ctx => $ctx,
base_url => base_url($ctx),
}, __PACKAGE__;
my @x;
my @h = ('Content-Type' => 'text/html; charset=UTF-8');
if (my $gz = gzip_maybe($ctx->{env})) {
my $err = $gz->deflate(_html_top($self), $x[0]);
die "gzip->deflate: $err" if $err != Z_OK;
if ($sref) {
$err = $gz->deflate($sref, $x[0]);
die "gzip->deflate: $err" if $err != Z_OK;
}
$err = $gz->deflate(_html_end($self), $x[0]);
die "gzip->deflate: $err" if $err != Z_OK;
$err = $gz->flush($x[0], Z_FINISH);
die "gzip->flush: $err" if $err != Z_OK;
push @h, qw(Vary Accept-Encoding Content-Encoding gzip);
} else {
@x = (_html_top($self), $sref ? $$sref : (), _html_end($self));
}
my $len = 0;
$len += bytes::length($_) for @x;
push @h, 'Content-Length', $len;
[ $code, \@h, \@x ]
}
1;
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