1 # Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # used for displaying help texts and other non-mail content
5 package PublicInbox::WwwText;
8 use PublicInbox::Linkify;
9 use PublicInbox::WwwStream;
10 use PublicInbox::Hval qw(ascii_html prurl);
11 use URI::Escape qw(uri_escape_utf8);
12 use PublicInbox::GzipFilter qw(gzf_maybe);
13 our $QP_URL = 'https://xapian.org/docs/queryparser.html';
14 our $WIKI_URL = 'https://en.wikipedia.org/wiki';
16 require PublicInbox::HlMod;
17 PublicInbox::HlMod->new
20 # /$INBOX/_/text/$KEY/ # KEY may contain slashes
21 # For now, "help" is the only supported $KEY
26 $key //= 'help'; # this 302s to _/text/help/
28 # get the raw text the same way we get mboxrds
29 my $raw = ($key =~ s!/raw\z!!);
30 my $have_tslash = ($key =~ s!/\z!!) if !$raw;
33 my $hdr = [ 'Content-Type', 'text/plain', 'Content-Length', undef ];
34 if (!_default_text($ctx, $key, $hdr, \$txt)) {
36 $txt = "404 Not Found ($key)\n";
38 my $env = $ctx->{env};
41 my $gzf = gzf_maybe($hdr, $env);
42 $txt = $gzf->translate($txt);
45 $hdr->[3] = length($txt);
46 return [ $code, $hdr, [ $txt ] ]
49 # enforce trailing slash for "wget -r" compatibility
50 if (!$have_tslash && $code == 200) {
51 my $url = $ctx->{ibx}->base_url($env);
52 $url .= "_/text/$key/";
54 return [ 302, [ 'Content-Type', 'text/plain',
56 [ "Redirecting to $url\n" ] ];
59 # Follow git commit message conventions,
60 # first line is the Subject/title
61 my ($title) = ($txt =~ /\A([^\n]*)/s);
62 $ctx->{-title_html} = ascii_html($title);
63 my $nslash = ($key =~ tr!/!/!);
64 $ctx->{-upfx} = '../../../' . ('../' x $nslash);
65 my $l = PublicInbox::Linkify->new;
68 $hl->do_hl_text(\$txt);
70 $txt = ascii_html($txt);
72 $txt = '<pre>' . $l->linkify_2($txt) . '</pre>';
73 PublicInbox::WwwStream::html_oneshot($ctx, $code, \$txt);
76 sub _srch_prefix ($$) {
77 my ($srch, $txt) = @_;
80 my $help = $srch->help;
82 for ($i = 0; $i < @$help; $i += 2) {
83 my $pfx = $help->[$i];
85 $pad = $n if $n > $pad;
87 $htxt .= $help->[$i + 1];
91 my $padding = ' ' x ($pad + 8);
92 $htxt =~ s/^/$padding/gms;
93 $htxt =~ s/^$padding(\S+)\0/" $1".
94 (' ' x ($pad - length($1)))/egms;
95 $htxt =~ s/\f\n/\n/gs;
100 sub _colors_help ($$) {
101 my ($ctx, $txt) = @_;
102 my $ibx = $ctx->{ibx};
103 my $env = $ctx->{env};
104 my $base_url = $ibx->base_url($env);
105 $$txt .= "color customization for $base_url\n";
108 public-inbox provides a stable set of CSS classes for users to
109 customize colors for highlighting diffs and code.
111 Users of browsers such as dillo, Firefox, or some browser
112 extensions may start by downloading the following sample CSS file
113 to control the colors they see:
115 ${base_url}userContent.css
121 $$txt .= PublicInbox::UserContent::sample($ibx, $env) . "```\n";
124 # git-config section names are quoted in the config file, so escape them
127 $name =~ s/\\/\\\\/g;
132 sub _coderepo_config ($$) {
133 my ($ctx, $txt) = @_;
134 my $cr = $ctx->{ibx}->{coderepo} // return;
135 # note: this doesn't preserve cgitrc layout, since we parse cgitrc
136 # and drop the original structure
137 $$txt .= "\tcoderepo = $_\n" for @$cr;
140 ; `coderepo' entries allows blob reconstruction via patch emails if
141 ; the inbox is indexed with Xapian. `@@ <from-range> <to-range> @@'
142 ; line number ranges in `[PATCH]' emails link to /$INBOX_NAME/$OID/s/,
143 ; an HTTP endpoint which reconstructs git blobs via git-apply(1).
145 my $pi_cfg = $ctx->{www}->{pi_cfg};
146 for my $cr_name (@$cr) {
147 my $urls = $pi_cfg->get_all("coderepo.$cr_name.cgiturl");
148 my $path = "/path/to/$cr_name";
149 $cr_name = dq_escape($cr_name);
151 $$txt .= qq([coderepo "$cr_name"]\n);
152 if ($urls && scalar(@$urls)) {
154 $$txt .= join(" ||\n\t;\t", map {;
156 if ($path !~ m![a-z0-9_/\.\-]!i) {
157 $dst = '"'.dq_escape($dst).'"';
159 qq(git clone $_ $dst);
163 $$txt .= "\tdir = $path\n";
164 $$txt .= "\tcgiturl = https://example.com/";
165 $$txt .= uri_escape_utf8($cr_name, '^A-Za-z0-9\-\._~/')."\n";
169 # n.b. this is a perfect candidate for memoization
170 sub inbox_config ($$$) {
171 my ($ctx, $hdr, $txt) = @_;
172 my $ibx = $ctx->{ibx};
173 push @$hdr, 'Content-Disposition', 'inline; filename=inbox.config';
174 my $name = dq_escape($ibx->{name});
175 my $inboxdir = '/path/to/top-level-inbox';
176 my $base_url = $ibx->base_url($ctx->{env});
178 ; Example public-inbox config snippet for a mirror of
180 ; See public-inbox-config(5) manpage for more details:
181 ; https://public-inbox.org/public-inbox-config.html
182 [publicinbox "$name"]
184 ; note: public-inbox before v1.2.0 used `mainrepo' instead of
185 ; `inboxdir', both remain supported after 1.2
187 url = https://example.com/$name/
188 url = http://example.onion/$name/
190 for my $k (qw(address listid infourl watchheader)) {
191 defined(my $v = $ibx->{$k}) or next;
192 $$txt .= "\t$k = $_\n" for @$v;
194 if (my $altid = $ibx->{altid}) {
195 my $altid_map = $ibx->altid_map;
197 ; altid DBs may be used to provide numeric article ID lookup from
198 ; old, pre-existing sources. You can recreate them via curl(1),
199 ; gzip(1), and sqlite3(1) as documented:
201 for (sort keys %$altid_map) {
202 $$txt .= "\t;\tcurl -d '' $base_url$_.sql.gz | \\\n" .
203 "\t;\tgzip -dc | \\\n" .
204 "\t;\tsqlite3 $inboxdir/$_.sqlite3\n";
205 $$txt .= "\taltid = serial:$_:file=$_.sqlite3\n";
209 for my $k (qw(filter newsgroup obfuscate replyto)) {
210 defined(my $v = $ibx->{$k}) or next;
211 $$txt .= "\t$k = $v\n";
213 $$txt .= "\tnntpmirror = $_\n" for (@{$ibx->nntp_url});
214 _coderepo_config($ctx, $txt);
218 # n.b. this is a perfect candidate for memoization
219 sub extindex_config ($$$) {
220 my ($ctx, $hdr, $txt) = @_;
221 my $ibx = $ctx->{ibx};
222 push @$hdr, 'Content-Disposition', 'inline; filename=extindex.config';
223 my $name = dq_escape($ibx->{name});
224 my $base_url = $ibx->base_url($ctx->{env});
226 ; Example public-inbox config snippet for the external index (extindex) at:
228 ; See public-inbox-config(5)manpage for more details:
229 ; https://public-inbox.org/public-inbox-config.html
231 topdir = /path/to/extindex-topdir
232 url = https://example.com/$name/
233 url = http://example.onion/$name/
235 for my $k (qw(infourl)) {
236 defined(my $v = $ibx->{$k}) or next;
237 $$txt .= "\t$k = $v\n";
239 _coderepo_config($ctx, $txt);
243 sub coderepos_raw ($$) {
244 my ($ctx, $top_url) = @_;
245 my $cr = $ctx->{ibx}->{coderepo} // return ();
246 my $cfg = $ctx->{www}->{pi_cfg};
248 for my $cr_name (@$cr) {
250 code repositories for project(s) associated with this inbox:
252 my $urls = $cfg->get_all("coderepo.$cr_name.cgiturl");
255 # relative or absolute URL?, prefix relative
256 # "foo.git" with appropriate number of "../"
257 my $u = m!\A(?:[a-z\+]+:)?//!i ? $_ :
259 $ret[0] .= "\n\t" . prurl($ctx->{env}, $u);
262 $ret[0] .= qq[\n\t$cr_name.git (no URL configured)];
265 @ret; # may be empty, this sub is called as an arg for join()
268 sub _mirror_help ($$) {
269 my ($ctx, $txt) = @_;
270 my $ibx = $ctx->{ibx};
271 my $base_url = $ibx->base_url($ctx->{env});
272 chop $base_url; # no trailing slash for "git clone"
273 my $dir = (split(m!/!, $base_url))[-1];
274 my %seen = ($base_url => 1);
275 my $top_url = $base_url;
276 $top_url =~ s!/[^/]+\z!/!;
277 $$txt .= "public-inbox mirroring instructions\n\n";
278 if ($ibx->can('cloneurl')) { # PublicInbox::Inbox
279 $$txt .= "This inbox may be cloned and mirrored by anyone:\n";
281 my $max = $ibx->max_git_epoch;
282 # TODO: some of these URLs may be too long and we may need to
283 # do something like code_footer() above, but these are local
285 if (defined($max)) { # v2
286 for my $i (0..$max) {
287 # old epochs my be deleted:
288 -d "$ibx->{inboxdir}/git/$i.git" or next;
289 my $url = "$base_url/$i";
291 push @urls, "$url $dir/git/$i.git";
293 my $nr = scalar(@urls);
296 $$txt .= "# this inbox consists of $nr epochs:";
297 $urls[0] .= " # oldest";
298 $urls[-1] .= " # newest";
301 push @urls, $base_url;
303 # FIXME: epoch splits can be different in other repositories,
304 # use the "cloneurl" file as-is for now:
305 for my $u (@{$ibx->cloneurl}) {
310 $$txt .= join('', map { "\tgit clone --mirror $_\n" } @urls);
311 if (my $addrs = $ibx->{address}) {
312 $addrs = join(' ', @$addrs) if ref($addrs) eq 'ARRAY';
313 my $v = defined $max ? '-V2' : '-V1';
316 # If you have public-inbox 1.1+ installed, you may
317 # initialize and index your mirror using the following commands:
318 public-inbox-init $v $ibx->{name} $dir/ $base_url \\
320 public-inbox-index $dir
323 } else { # PublicInbox::ExtSearch
325 This is an extindex which is an amalgamation of several public-inboxes.
326 Each public-inbox needs to be mirrored individually.
328 my $v = $ctx->{www}->{pi_cfg}->{lc('publicInbox.wwwListing')};
329 if (($v // '') =~ /\A(?:all|match=domain)\z/) {
331 A list of them is available at $top_url
335 my $cfg_link = "$base_url/_/text/config/raw";
338 Example config snippet for mirrors: $cfg_link
340 if ($ibx->can('nntp_url')) {
341 my $nntp = $ibx->nntp_url;
344 $$txt .= @$nntp == 1 ? 'Newsgroup' : 'Newsgroups are';
345 $$txt .= ' available over NNTP:';
346 $$txt .= "\n\t" . join("\n\t", @$nntp) . "\n";
349 if ($$txt =~ m!\b[^:]+://\w+\.onion/!) {
352 note: .onion URLs require Tor: https://www.torproject.org/
356 my $code_url = prurl($ctx->{env}, $PublicInbox::WwwStream::CODE_URL);
357 $$txt .= join("\n\n",
358 coderepos_raw($ctx, $top_url), # may be empty
359 "AGPL code for this site:\n\tgit clone $code_url");
363 sub _default_text ($$$$) {
364 my ($ctx, $key, $hdr, $txt) = @_;
365 if ($key eq 'mirror') {
366 return _mirror_help($ctx, $txt);
367 } elsif ($key eq 'color') {
368 return _colors_help($ctx, $txt);
369 } elsif ($key eq 'config') {
370 return $ctx->{ibx}->can('cloneurl') ?
371 inbox_config($ctx, $hdr, $txt) :
372 extindex_config($ctx, $hdr, $txt);
375 return if $key ne 'help'; # TODO more keys?
377 my $ibx = $ctx->{ibx};
378 my $base_url = $ibx->base_url($ctx->{env});
379 $$txt .= "public-inbox help for $base_url\n";
385 public-inbox uses Message-ID identifiers in URLs.
386 One may look up messages by substituting Message-IDs
387 (without the leading '<' or trailing '>') into the URL.
388 Forward slash ('/') characters in the Message-IDs
389 need to be escaped as "%2F" (without quotes).
391 Thus, it is possible to retrieve any message by its
392 Message-ID by going to:
394 $base_url<Message-ID>/
396 (without the '<' or '>')
398 Message-IDs are described at:
404 # n.b. we use the Xapian DB for any regeneratable,
405 # order-of-arrival-independent data.
406 my $srch = $ibx->isrch;
412 This public-inbox has search functionality provided by Xapian.
414 It supports typical AND, OR, NOT, '+', '-' queries present
415 in other search engines.
417 We also support search prefixes to limit the scope of the
418 search to certain fields.
420 Prefixes supported in this installation include:
423 _srch_prefix($srch, $txt);
427 Most prefixes are probabilistic, meaning they support stemming
428 and wildcards ('*'). Ranges (such as 'd:') and boolean prefixes
429 do not support stemming or wildcards.
430 The upstream Xapian query parser documentation fully explains
437 my $over = $ibx->over;
443 Message threading is enabled for this public-inbox,
444 additional endpoints for message threads are available:
446 * $base_url<Message-ID>/T/#u
448 Loads the thread belonging to the given <Message-ID>
449 in flat chronological order. The "#u" anchor
450 focuses the browser on the given <Message-ID>.
452 * $base_url<Message-ID>/t/#u
454 Loads the thread belonging to the given <Message-ID>
455 in threaded order with nesting. For deep threads,
456 this requires a wide display or horizontal scrolling.
458 Both of these HTML endpoints are suitable for offline reading
459 using the thread overview at the bottom of each page.
461 Users of feed readers may follow a particular thread using:
463 * $base_url<Message-ID>/t.atom
465 Which loads the thread in Atom Syndication Standard
466 described at Wikipedia and RFC4287:
468 $WIKI_URL/Atom_(standard)
469 https://tools.ietf.org/html/rfc4287
471 Atom Threading Extensions (RFC4685) is supported:
473 https://tools.ietf.org/html/rfc4685
475 Finally, the gzipped mbox for a thread is available for
476 downloading and importing into your favorite mail client:
478 * $base_url<Message-ID>/t.mbox.gz
480 We use the mboxrd variant of the mbox format described
492 This help text is maintained by public-inbox developers
493 reachable via plain-text email at: meta\@public-inbox.org
494 Their inbox is archived at: https://public-inbox.org/meta/
497 # TODO: support admin contact info in ~/.public-inbox/config