1 # Copyright (C) all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Main web interface for mailing list archives
6 # We focus on the lowest common denominators here:
7 # - targeted at text-only console browsers (w3m, links, etc..)
8 # - Only basic HTML, CSS only for line-wrapping <pre> text content for GUIs
9 # and diff/syntax-highlighting (optional)
10 # - No JavaScript, graphics or icons allowed.
11 # - Must not rely on static content
12 # - UTF-8 is only for user-content, 7-bit US-ASCII for us
13 package PublicInbox::WWW;
16 use PublicInbox::Config;
17 use PublicInbox::Hval;
18 use URI::Escape qw(uri_unescape);
19 use PublicInbox::MID qw(mid_escape);
20 use PublicInbox::GitHTTPBackend;
21 use PublicInbox::UserContent;
22 use PublicInbox::WwwStatic qw(r path_info_raw);
25 # TODO: consider a routing tree now that we have more endpoints:
26 our $INBOX_RE = qr!\A/([\w\-][\w\.\-]*)!;
27 our $MID_RE = qr!([^/]+)!;
28 our $END_RE = qr!(T/|t/|t\.mbox(?:\.gz)?|t\.atom|raw|)!;
29 our $ATTACH_RE = qr!([0-9][0-9\.]*)-($PublicInbox::Hval::FN)!;
30 our $OID_RE = qr![a-f0-9]{7,}!;
33 my ($class, $pi_cfg) = @_;
34 bless { pi_cfg => $pi_cfg // PublicInbox::Config->new }, $class;
37 # backwards compatibility, do not use
39 my ($req, $method) = @_;
40 PublicInbox::WWW->new->call($req->env);
44 my ($self, $env) = @_;
45 my $ctx = { env => $env, www => $self };
47 # we don't care about multi-value
51 my ($k, $v) = split(/=/, $_, 2);
52 # none of the keys we care about will need escaping
53 ($k // '', uri_unescape($v // ''))
54 } split(/[&;]+/, $env->{QUERY_STRING});
56 my $path_info = path_info_raw($env);
57 my $method = $env->{REQUEST_METHOD};
59 if ($method eq 'POST') {
60 if ($path_info =~ m!$INBOX_RE/(?:(?:git/)?([0-9]+)(?:\.git)?/)?
61 (git-upload-pack)\z!x) {
62 my ($epoch, $path) = ($2, $3);
63 return invalid_inbox($ctx, $1) ||
64 serve_git($ctx, $epoch, $path);
65 } elsif ($path_info =~ m!$INBOX_RE/(\w+)\.sql\.gz\z!o) {
66 return get_altid_dump($ctx, $1, $2);
67 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/$ATTACH_RE\z!o) {
68 my ($idx, $fn) = ($3, $4);
69 return invalid_inbox_mid($ctx, $1, $2) ||
70 get_attach($ctx, $idx, $fn);
71 } elsif ($path_info =~ m!$INBOX_RE/!o) {
72 return invalid_inbox($ctx, $1) || mbox_results($ctx);
75 elsif ($method !~ /\A(?:GET|HEAD)\z/) {
79 # top-level indices and feeds
80 if ($path_info eq '/') {
81 require PublicInbox::WwwListing;
82 PublicInbox::WwwListing->response($ctx);
83 } elsif ($path_info eq '/manifest.js.gz') {
84 require PublicInbox::ManifestJsGz;
85 PublicInbox::ManifestJsGz->response($ctx);
86 } elsif ($path_info =~ m!$INBOX_RE\z!o) {
87 invalid_inbox($ctx, $1) || r301($ctx, $1);
88 } elsif ($path_info =~ m!$INBOX_RE(?:/|/index\.html)?\z!o) {
89 invalid_inbox($ctx, $1) || get_index($ctx);
90 } elsif ($path_info =~ m!$INBOX_RE/(?:atom\.xml|new\.atom)\z!o) {
91 invalid_inbox($ctx, $1) || get_atom($ctx);
92 } elsif ($path_info =~ m!$INBOX_RE/new\.html\z!o) {
93 invalid_inbox($ctx, $1) || get_new($ctx);
94 } elsif ($path_info =~ m!$INBOX_RE/description\z!o) {
95 get_description($ctx, $1);
96 } elsif ($path_info =~ m!$INBOX_RE/(?:(?:git/)?([0-9]+)(?:\.git)?/)?
97 ($PublicInbox::GitHTTPBackend::ANY)\z!ox) {
98 my ($epoch, $path) = ($2, $3);
99 invalid_inbox($ctx, $1) || serve_git($ctx, $epoch, $path);
100 } elsif ($path_info =~ m!$INBOX_RE/([a-zA-Z0-9_\-]+).mbox\.gz\z!o) {
101 serve_mbox_range($ctx, $1, $2);
102 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/$END_RE\z!o) {
103 msg_page($ctx, $1, $2, $3);
105 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/$ATTACH_RE\z!o) {
106 my ($idx, $fn) = ($3, $4);
107 invalid_inbox_mid($ctx, $1, $2) || get_attach($ctx, $idx, $fn);
108 # in case people leave off the trailing slash:
109 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/(T|t)\z!o) {
110 my ($inbox, $mid_ue, $suffix) = ($1, $2, $3);
111 $suffix .= $suffix =~ /\A[tT]\z/ ? '/#u' : '/';
112 r301($ctx, $inbox, $mid_ue, $suffix);
114 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/R/?\z!o) {
115 my ($inbox, $mid_ue) = ($1, $2);
116 r301($ctx, $inbox, $mid_ue, '#R');
118 } elsif ($path_info =~ m!$INBOX_RE/$MID_RE/f/?\z!o) {
120 } elsif ($path_info =~ m!$INBOX_RE/_/text(?:/(.*))?\z!o) {
121 get_text($ctx, $1, $2);
122 } elsif ($path_info =~ m!$INBOX_RE/([a-zA-Z0-9_\-\.]+)\.css\z!o) {
123 get_css($ctx, $1, $2);
124 } elsif ($path_info =~ m!$INBOX_RE/manifest\.js\.gz\z!o) {
125 get_inbox_manifest($ctx, $1, $2);
126 } elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s/\z!o) {
127 get_vcs_object($ctx, $1, $2);
128 } elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s/
129 ($PublicInbox::Hval::FN)\z!ox) {
130 get_vcs_object($ctx, $1, $2, $3);
131 } elsif ($path_info =~ m!$INBOX_RE/($OID_RE)/s\z!o) {
132 r301($ctx, $1, $2, 's/');
133 } elsif ($path_info =~ m!$INBOX_RE/(\w+)\.sql\.gz\z!o) {
134 get_altid_dump($ctx, $1, $2);
135 # convenience redirects order matters
136 } elsif ($path_info =~ m!$INBOX_RE/([^/]{2,})\z!o) {
138 } elsif ($path_info =~ m!\A/\+/([a-zA-Z0-9_\-\.]+)\.css\z!) {
139 get_css($ctx, undef, $1); # for WwwListing
141 legacy_redirects($ctx, $path_info);
145 # for CoW-friendliness, MOOOOO! Even for single-process setups,
146 # we want to get all immortal allocations done early to avoid heap
147 # fragmentation since common allocators favor a large contiguous heap.
151 # populate caches used by Encode internally, since emails
152 # may show up with any encoding.
154 Encode::find_encoding($_) for Encode->encodings(':all');
156 require PublicInbox::ExtMsg;
157 require PublicInbox::Feed;
158 require PublicInbox::View;
159 require PublicInbox::SearchThread;
160 require PublicInbox::Eml;
161 require PublicInbox::Mbox;
162 require PublicInbox::ViewVCS;
163 require PublicInbox::WwwText;
164 require PublicInbox::WwwAttach;
166 require PublicInbox::Search;
167 PublicInbox::Search::load_xapian();
169 for (qw(SearchView MboxGz WwwAltId)) {
170 eval "require PublicInbox::$_;";
173 my $pi_cfg = $self->{pi_cfg};
174 if (defined($pi_cfg->{'publicinbox.cgitrc'})) {
175 $pi_cfg->limiter('-cgit');
177 $pi_cfg->ALL and require PublicInbox::Isearch;
179 $self->stylesheets_prepare($_) for ('', '../', '../../');
184 # private functions below
188 if ($ctx && $ctx->{mid}) {
189 require PublicInbox::ExtMsg;
190 return PublicInbox::ExtMsg::ext_msg($ctx);
195 sub news_cgit_fallback ($) {
197 my $www = $ctx->{www};
198 my $env = $ctx->{env};
199 my $res = $www->news_www->call($env);
200 $res->[0] == 404 ? $www->cgit->call($env) : $res;
203 # returns undef if valid, array ref response if invalid
204 sub invalid_inbox ($$) {
205 my ($ctx, $inbox) = @_;
206 my $ibx = $ctx->{www}->{pi_cfg}->lookup_name($inbox) //
207 $ctx->{www}->{pi_cfg}->lookup_ei($inbox);
213 # sometimes linkifiers (not ours!) screw up automatic link
214 # generation and link things intended for nntp:// to https?://,
215 # so try to infer links and redirect them to the appropriate
217 news_cgit_fallback($ctx);
220 # returns undef if valid, array ref response if invalid
221 sub invalid_inbox_mid {
222 my ($ctx, $inbox, $mid_ue) = @_;
223 my $ret = invalid_inbox($ctx, $inbox);
226 my $mid = $ctx->{mid} = uri_unescape($mid_ue);
227 my $ibx = $ctx->{ibx};
228 if ($mid =~ m!\A([a-f0-9]{2})([a-f0-9]{38})\z!) {
229 my ($x2, $x38) = ($1, $2);
230 # this is horrifically wasteful for legacy URLs:
231 my $str = $ctx->{ibx}->msg_by_path("$x2/$x38") or return;
232 my $s = PublicInbox::Eml->new($str);
233 $mid = PublicInbox::MID::mid_clean($s->header_raw('Message-ID'));
234 return r301($ctx, $inbox, mid_escape($mid));
239 # /$INBOX/new.atom -> Atom feed, includes replies
242 require PublicInbox::Feed;
243 PublicInbox::Feed::generate($ctx);
246 # /$INBOX/new.html -> HTML only
249 require PublicInbox::Feed;
250 PublicInbox::Feed::new_html($ctx);
253 # /$INBOX/?r=$GIT_COMMIT -> HTML only
256 require PublicInbox::Feed;
257 if ($ctx->{env}->{QUERY_STRING} =~ /(?:\A|[&;])q=/) {
258 require PublicInbox::SearchView;
259 PublicInbox::SearchView::sres_top_html($ctx);
261 PublicInbox::Feed::generate_html_index($ctx);
265 # /$INBOX/$MESSAGE_ID/raw -> raw mbox
268 require PublicInbox::Mbox;
269 PublicInbox::Mbox::emit_raw($ctx) || r(404);
272 # /$INBOX/$MESSAGE_ID/ -> HTML content (short quotes)
275 require PublicInbox::View;
276 PublicInbox::View::msg_page($ctx) || r404($ctx);
279 # /$INBOX/$MESSAGE_ID/t/
281 my ($ctx, $flat) = @_;
282 $ctx->{ibx}->over or return need($ctx, 'Overview');
283 $ctx->{flat} = $flat;
284 require PublicInbox::View;
285 PublicInbox::View::thread_html($ctx);
288 # /$INBOX/_/text/$KEY/
289 # /$INBOX/_/text/$KEY/raw
290 # KEY may contain slashes
292 my ($ctx, $inbox, $key) = @_;
293 my $r404 = invalid_inbox($ctx, $inbox);
294 return $r404 if $r404;
296 require PublicInbox::WwwText;
297 PublicInbox::WwwText::get_text($ctx, $key);
300 # show git objects (blobs and commits)
301 # /$INBOX/$GIT_OBJECT_ID/s/
302 # /$INBOX/$GIT_OBJECT_ID/s/$FILENAME
303 sub get_vcs_object ($$$;$) {
304 my ($ctx, $inbox, $oid, $filename) = @_;
305 my $r404 = invalid_inbox($ctx, $inbox);
306 return $r404 if $r404 || !$ctx->{www}->{pi_cfg}->repo_objs($ctx->{ibx});
307 require PublicInbox::ViewVCS;
308 PublicInbox::ViewVCS::show($ctx, $oid, $filename);
312 my ($ctx, $inbox, $altid_pfx) =@_;
313 my $r404 = invalid_inbox($ctx, $inbox);
314 return $r404 if $r404;
315 eval { require PublicInbox::WwwAltId } or return need($ctx, 'sqlite3');
316 PublicInbox::WwwAltId::sqldump($ctx, $altid_pfx);
320 my ($ctx, $extra) = @_;
321 require PublicInbox::WwwStream;
322 PublicInbox::WwwStream::html_oneshot($ctx, 501, \<<EOF);
323 <pre>$extra is not available for this public-inbox
324 <a\nhref="../">Return to index</a></pre>
328 # /$INBOX/$MESSAGE_ID/t.mbox -> thread as mbox
329 # /$INBOX/$MESSAGE_ID/t.mbox.gz -> thread as gzipped mbox
330 # note: I'm not a big fan of other compression formats since they're
331 # significantly more expensive on CPU than gzip and less-widely available,
332 # especially on older systems. Stick to zlib since that's what git uses.
333 sub get_thread_mbox {
334 my ($ctx, $sfx) = @_;
335 my $over = $ctx->{ibx}->over or return need($ctx, 'Overview');
336 require PublicInbox::Mbox;
337 PublicInbox::Mbox::thread_mbox($ctx, $over, $sfx);
341 # /$INBOX/$MESSAGE_ID/t.atom -> thread as Atom feed
342 sub get_thread_atom {
344 $ctx->{ibx}->over or return need($ctx, 'Overview');
345 require PublicInbox::Feed;
346 PublicInbox::Feed::generate_thread_atom($ctx);
349 sub legacy_redirects {
350 my ($ctx, $path_info) = @_;
352 # single-message pages
353 if ($path_info =~ m!$INBOX_RE/m/(\S+)/\z!o) {
355 } elsif ($path_info =~ m!$INBOX_RE/m/(\S+)/raw\z!o) {
356 r301($ctx, $1, $2, 'raw');
358 } elsif ($path_info =~ m!$INBOX_RE/f/(\S+)/\z!o) {
362 } elsif ($path_info =~ m!$INBOX_RE/t/(\S+)/\z!o) {
363 r301($ctx, $1, $2, 't/#u');
365 } elsif ($path_info =~ m!$INBOX_RE/t/(\S+)/mbox(\.gz)?\z!o) {
366 r301($ctx, $1, $2, "t.mbox$3");
368 # even older legacy redirects
369 } elsif ($path_info =~ m!$INBOX_RE/m/(\S+)\.html\z!o) {
372 } elsif ($path_info =~ m!$INBOX_RE/t/(\S+)\.html\z!o) {
373 r301($ctx, $1, $2, 't/#u');
375 } elsif ($path_info =~ m!$INBOX_RE/f/(\S+)\.html\z!o) {
378 } elsif ($path_info =~ m!$INBOX_RE/(?:m|f)/(\S+)\.txt\z!o) {
379 r301($ctx, $1, $2, 'raw');
381 } elsif ($path_info =~ m!$INBOX_RE/t/(\S+)(\.mbox(?:\.gz)?)\z!o) {
382 r301($ctx, $1, $2, "t$3");
384 # legacy convenience redirects, order still matters
385 } elsif ($path_info =~ m!$INBOX_RE/m/(\S+)\z!o) {
387 } elsif ($path_info =~ m!$INBOX_RE/t/(\S+)\z!o) {
388 r301($ctx, $1, $2, 't/#u');
389 } elsif ($path_info =~ m!$INBOX_RE/f/(\S+)\z!o) {
392 # some Message-IDs have slashes in them and the HTTP server
393 # may try to be clever and unescape them :<
394 } elsif ($path_info =~ m!$INBOX_RE/(\S+/\S+)/$END_RE\z!o) {
395 msg_page($ctx, $1, $2, $3);
397 # in case people leave off the trailing slash:
398 } elsif ($path_info =~ m!$INBOX_RE/(\S+/\S+)/(T|t)\z!o) {
399 r301($ctx, $1, $2, $3 eq 't' ? 't/#u' : $3);
400 } elsif ($path_info =~ m!$INBOX_RE/(\S+/\S+)/f\z!o) {
403 news_cgit_fallback($ctx);
408 my ($ctx, $inbox, $mid_ue, $suffix) = @_;
409 my $ibx = $ctx->{ibx};
411 my $r404 = invalid_inbox($ctx, $inbox);
412 return $r404 if $r404;
415 my $url = $ibx->base_url($ctx->{env});
416 my $qs = $ctx->{env}->{QUERY_STRING};
417 if (defined $mid_ue) {
418 # common, and much nicer as '@' than '%40':
419 $mid_ue =~ s/%40/@/g;
420 $url .= $mid_ue . '/';
422 $url .= $suffix if (defined $suffix);
423 $url .= "?$qs" if $qs ne '';
426 [ Location => $url, 'Content-Type' => 'text/plain' ],
427 [ "Redirecting to $url\n" ] ]
431 my ($ctx, $inbox, $mid_ue, $e) = @_;
433 $ret = invalid_inbox_mid($ctx, $inbox, $mid_ue) and return $ret;
434 '' eq $e and return get_mid_html($ctx);
435 'T/' eq $e and return get_thread($ctx, 1);
436 't/' eq $e and return get_thread($ctx);
437 't.atom' eq $e and return get_thread_atom($ctx);
438 't.mbox' eq $e and return get_thread_mbox($ctx);
439 't.mbox.gz' eq $e and return get_thread_mbox($ctx, '.gz');
440 'raw' eq $e and return get_mid_txt($ctx);
442 # legacy, but no redirect for compatibility:
443 'f/' eq $e and return get_mid_html($ctx);
448 my ($ctx, $epoch, $path) = @_;
449 my $env = $ctx->{env};
450 my $ibx = $ctx->{ibx};
451 my $git = defined $epoch ? $ibx->git_epoch($epoch) : $ibx->git;
452 $git ? PublicInbox::GitHTTPBackend::serve($env, $git, $path) : r404();
457 if ($ctx->{env}->{QUERY_STRING} =~ /(?:\A|[&;])q=/) {
458 $ctx->{ibx}->isrch or return need($ctx, 'search');
459 require PublicInbox::SearchView;
460 return PublicInbox::SearchView::mbox_results($ctx);
465 sub serve_mbox_range {
466 my ($ctx, $inbox, $range) = @_;
467 invalid_inbox($ctx, $inbox) || eval {
468 require PublicInbox::Mbox;
469 PublicInbox::Mbox::emit_range($ctx, $range);
475 $self->{news_www} //= do {
476 require PublicInbox::NewsWWW;
477 PublicInbox::NewsWWW->new($self->{pi_cfg});
483 $self->{cgit} //= do {
484 my $pi_cfg = $self->{pi_cfg};
486 if (defined($pi_cfg->{'publicinbox.cgitrc'})) {
487 require PublicInbox::Cgit;
488 PublicInbox::Cgit->new($pi_cfg);
491 Plack::Util::inline_object(call => sub { r404() });
496 # GET $INBOX/manifest.js.gz
497 sub get_inbox_manifest ($$$) {
498 my ($ctx, $inbox, $key) = @_;
499 my $r404 = invalid_inbox($ctx, $inbox);
500 return $r404 if $r404;
501 require PublicInbox::ManifestJsGz;
502 PublicInbox::ManifestJsGz::per_inbox($ctx);
506 my ($ctx, $idx, $fn) = @_;
507 require PublicInbox::WwwAttach;
508 PublicInbox::WwwAttach::get_attach($ctx, $idx, $fn);
511 # User-generated content (UGC) may have excessively long lines
512 # and screw up rendering on some browsers, so we use pre-wrap.
514 # We also force everything to the same scaled font-size because GUI
515 # browsers (tested both Firefox and surf (webkit)) uses a larger font
516 # for the Search <form> element than the rest of the page. Font size
517 # uniformity is important to people who rely on gigantic fonts.
518 # Finally, we use monospace to ensure the Search field and button
519 # has the same size and spacing as everything else which is
520 # <pre>-formatted anyways.
521 our $STYLE = 'pre{white-space:pre-wrap}*{font-size:100%;font-family:monospace}';
523 sub stylesheets_prepare ($$) {
524 my ($self, $upfx) = @_;
526 require CSS::Minifier;
527 sub { CSS::Minifier::minify(input => $_[0]) };
529 require CSS::Minifier::XS;
530 sub { CSS::Minifier::XS::minify($_[0]) };
534 my $stylesheets = $self->{pi_cfg}->{css} || [];
538 foreach my $s (@$stylesheets) {
541 foreach my $k (qw(media title href)) {
542 if (s/\s*$k='([^']+)'// || s/\s*$k=(\S+)//) {
547 if (defined $attr->{href}) {
551 my ($key) = (m!([^/]+?)(?:\.css)?\z!i);
552 if ($key !~ /\A[a-zA-Z0-9_\-\.]+\z/) {
553 warn "ignoring $fn, non-ASCII word character\n";
556 open(my $fh, '<', $fn) or do {
557 warn "failed to open $fn: $!\n";
561 my $local = do { local $/; <$fh> };
562 if ($local =~ /\S/) {
563 $ctime = sprintf('%x',(stat($fh))[10]);
564 $local = $mini->($local);
567 # do not let BOFHs override userContent.css:
568 if ($local =~ /!\s*important\b/i) {
569 warn "ignoring $fn since it uses `!important'\n";
573 $css_map->{$key} = $local;
574 $attr->{href} = "$upfx$key.css?$ctime";
575 if (defined($attr->{title})) {
577 } elsif (($attr->{media}||'screen') eq 'screen') {
578 $attr->{-inline} = $local;
584 my $buf = "<style>$STYLE";
586 my @ext; # for media=print and whatnot
587 foreach my $attr (@$links) {
588 if (defined(my $str = delete $attr->{-inline})) {
599 foreach my $attr (@$links) {
600 delete $attr->{-inline};
601 $buf .= "<link\ntype=text/css\nrel=stylesheet";
602 while (my ($k, $v) = each %$attr) {
603 $v = qq{"$v"} if $v =~ /[\s=]/;
608 $self->{"-style-$upfx"} = $buf;
610 $self->{-style_inline} = $buf;
612 $self->{-css_map} = $css_map;
615 # returns an HTML fragment with <style> or <link> tags in them
616 # Called by WwwStream by nearly every HTML page
618 my ($self, $upfx) = @_;
619 $self->{-style_inline} || $self->{"-style-$upfx"} || do {
620 stylesheets_prepare($self, $upfx);
621 $self->{-style_inline} || $self->{"-style-$upfx"}
625 # /$INBOX/$KEY.css and /+/$KEY.css endpoints
626 # CSS is configured globally for all inboxes, but we access them on
627 # a per-inbox basis. This allows administrators to setup per-inbox
628 # static routes to intercept the request before it hits PSGI
629 # inbox == undef => top-level WwwListing
631 my ($ctx, $inbox, $key) = @_;
632 my $r404 = defined($inbox) ? invalid_inbox($ctx, $inbox) : undef;
633 return $r404 if $r404;
634 my $self = $ctx->{www};
635 my $css_map = $self->{-css_map} ||
636 stylesheets_prepare($self, defined($inbox) ? '' : '+/');
637 my $css = $css_map->{$key};
638 if (!defined($css) && defined($inbox) && $key eq 'userContent') {
639 my $env = $ctx->{env};
640 $css = PublicInbox::UserContent::sample($ctx->{ibx}, $env);
642 defined $css or return r404();
643 my $h = [ 'Content-Length', length($css), 'Content-Type', 'text/css' ];
644 PublicInbox::GitHTTPBackend::cache_one_year($h);
645 [ 200, $h, [ $css ] ];
648 sub get_description {
649 my ($ctx, $inbox) = @_;
650 invalid_inbox($ctx, $inbox) || do {
651 my $d = $ctx->{ibx}->description . "\n";
653 [ 200, [ 'Content-Length', length($d),
654 'Content-Type', 'text/plain' ], [ $d ] ];
658 sub event_step { # called via requeue
660 # gzf = PublicInbox::GzipFilter == $ctx
661 my $gzf = shift(@{$self->{-low_prio_q}}) // return;
662 PublicInbox::DS::requeue($self) if scalar(@{$self->{-low_prio_q}});
663 my $http = $gzf->{env}->{'psgix.io'}; # PublicInbox::HTTP
664 $http->next_step($gzf->can('async_next'));