1 # Copyright (C) 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 HTTP::Date qw(time2str);
12 use URI::Escape qw(uri_escape_utf8);
13 use PublicInbox::GzipFilter qw(gzf_maybe);
14 our $QP_URL = 'https://xapian.org/docs/queryparser.html';
15 our $WIKI_URL = 'https://en.wikipedia.org/wiki';
17 require PublicInbox::HlMod;
18 PublicInbox::HlMod->new
21 # /$INBOX/_/text/$KEY/ # KEY may contain slashes
22 # For now, "help" is the only supported $KEY
27 $key //= 'help'; # this 302s to _/text/help/
29 # get the raw text the same way we get mboxrds
30 my $raw = ($key =~ s!/raw\z!!);
31 my $have_tslash = ($key =~ s!/\z!!) if !$raw;
34 my $hdr = [ 'Content-Type', 'text/plain', 'Content-Length', undef ];
35 if (!_default_text($ctx, $key, $hdr, \$txt)) {
37 $txt = "404 Not Found ($key)\n";
39 my $env = $ctx->{env};
42 my $gzf = gzf_maybe($hdr, $env);
43 $txt = $gzf->translate($txt);
46 $hdr->[3] = length($txt);
47 return [ $code, $hdr, [ $txt ] ]
50 # enforce trailing slash for "wget -r" compatibility
51 if (!$have_tslash && $code == 200) {
52 my $url = $ctx->{ibx}->base_url($env);
53 $url .= "_/text/$key/";
55 return [ 302, [ 'Content-Type', 'text/plain',
57 [ "Redirecting to $url\n" ] ];
60 # Follow git commit message conventions,
61 # first line is the Subject/title
62 my ($title) = ($txt =~ /\A([^\n]*)/s);
63 $ctx->{-title_html} = ascii_html($title);
64 my $nslash = ($key =~ tr!/!/!);
65 $ctx->{-upfx} = '../../../' . ('../' x $nslash);
66 my $l = PublicInbox::Linkify->new;
69 $hl->do_hl_text(\$txt);
71 $txt = ascii_html($txt);
73 $txt = '<pre>' . $l->linkify_2($txt) . '</pre>';
74 PublicInbox::WwwStream::html_oneshot($ctx, $code, \$txt);
77 sub _srch_prefix ($$) {
81 my $help = $ibx->isrch->help;
83 for ($i = 0; $i < @$help; $i += 2) {
84 my $pfx = $help->[$i];
86 $pad = $n if $n > $pad;
88 $htxt .= $help->[$i + 1];
92 my $padding = ' ' x ($pad + 4);
93 $htxt =~ s/^/$padding/gms;
94 $htxt =~ s/^$padding(\S+)\0/" $1".(' ' x ($pad - length($1)))/egms;
95 $htxt =~ s/\f\n/\n/gs;
100 sub _colors_help ($$) {
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 $t = eval { $ibx->mm->created_at };
175 push(@$hdr, 'Last-Modified', time2str($t)) if $t;
176 my $name = dq_escape($ibx->{name});
177 my $inboxdir = '/path/to/top-level-inbox';
178 my $base_url = $ibx->base_url($ctx->{env});
180 ; Example public-inbox config snippet for a mirror of
182 ; See public-inbox-config(5) manpage for more details:
183 ; https://public-inbox.org/public-inbox-config.html
184 [publicinbox "$name"]
186 ; note: public-inbox before v1.2.0 used `mainrepo' instead of
187 ; `inboxdir', both remain supported after 1.2
189 url = https://example.com/$name/
190 url = http://example.onion/$name/
192 for my $k (qw(address listid infourl watchheader)) {
193 defined(my $v = $ibx->{$k}) or next;
194 $$txt .= "\t$k = $_\n" for @$v;
196 if (my $altid = $ibx->{altid}) {
197 my $altid_map = $ibx->altid_map;
199 ; altid DBs may be used to provide numeric article ID lookup from
200 ; old, pre-existing sources. You can recreate them via curl(1),
201 ; gzip(1), and sqlite3(1) as documented:
203 for (sort keys %$altid_map) {
204 $$txt .= "\t;\tcurl -d '' $base_url$_.sql.gz | \\\n" .
205 "\t;\tgzip -dc | \\\n" .
206 "\t;\tsqlite3 $inboxdir/$_.sqlite3\n";
207 $$txt .= "\taltid = serial:$_:file=$_.sqlite3\n";
211 for my $k (qw(filter newsgroup obfuscate replyto)) {
212 defined(my $v = $ibx->{$k}) or next;
213 $$txt .= "\t$k = $v\n";
215 $$txt .= "\timapmirror = $_\n" for (@{$ibx->imap_url($ctx)});
216 $$txt .= "\tnntpmirror = $_\n" for (@{$ibx->nntp_url($ctx)});
217 _coderepo_config($ctx, $txt);
221 # n.b. this is a perfect candidate for memoization
222 sub extindex_config ($$$) {
223 my ($ctx, $hdr, $txt) = @_;
224 my $ibx = $ctx->{ibx};
225 push @$hdr, 'Content-Disposition', 'inline; filename=extindex.config';
226 my $name = dq_escape($ibx->{name});
227 my $base_url = $ibx->base_url($ctx->{env});
229 ; Example public-inbox config snippet for the external index (extindex) at:
231 ; See public-inbox-config(5)manpage for more details:
232 ; https://public-inbox.org/public-inbox-config.html
234 topdir = /path/to/extindex-topdir
235 url = https://example.com/$name/
236 url = http://example.onion/$name/
238 for my $k (qw(infourl)) {
239 defined(my $v = $ibx->{$k}) or next;
240 $$txt .= "\t$k = $v\n";
242 _coderepo_config($ctx, $txt);
246 sub coderepos_raw ($$) {
247 my ($ctx, $top_url) = @_;
248 my $cr = $ctx->{ibx}->{coderepo} // return ();
249 my $cfg = $ctx->{www}->{pi_cfg};
251 for my $cr_name (@$cr) {
253 my $thing = $ctx->{ibx}->can('cloneurl') ?
254 'public inbox' : 'external index';
256 Code repositories for project(s) associated with this $thing
259 my $urls = $cfg->get_all("coderepo.$cr_name.cgiturl");
262 # relative or absolute URL?, prefix relative
263 # "foo.git" with appropriate number of "../"
264 my $u = m!\A(?:[a-z\+]+:)?//!i ? $_ :
266 $ret[0] .= "\n\t" . prurl($ctx->{env}, $u);
269 $ret[0] .= qq[\n\t$cr_name.git (no URL configured)];
272 @ret; # may be empty, this sub is called as an arg for join()
275 sub _add_non_http_urls ($$) {
276 my ($ctx, $txt) = @_;
277 $ctx->{ibx}->can('nntp_url') or return; # TODO extindex can have IMAP
278 my $urls = $ctx->{ibx}->imap_url($ctx);
280 $$txt .= "\nIMAP subfolder(s) are available under:";
281 $$txt .= "\n " . join("\n ", @$urls);
284 # each subfolder (starting with `0') holds 50K messages at most
287 $urls = $ctx->{ibx}->nntp_url($ctx);
289 $$txt .= @$urls == 1 ? "\nNewsgroup" : "\nNewsgroups are";
290 $$txt .= ' available over NNTP:';
291 $$txt .= "\n " . join("\n ", @$urls) . "\n";
293 $urls = $ctx->{ibx}->pop3_url($ctx);
295 $urls = join("\n ", @$urls);
298 POP3 access is available:
301 The password is: anonymous
302 The username is: \$(uuidgen)\@$ctx->{ibx}->{newsgroup}
303 where \$(uuidgen) in the output of the `uuidgen' command on your system.
304 The UUID in the username functions as a private cookie (don't share it).
305 Idle accounts will expire periodically.
310 sub _add_onion_note ($) {
312 $$txt =~ m!\b[^:]+://\w+\.onion/!i and $$txt .= <<EOM
314 note: .onion URLs require Tor: https://www.torproject.org/
319 sub _mirror_help ($$) {
320 my ($ctx, $txt) = @_;
321 my $ibx = $ctx->{ibx};
322 my $base_url = $ibx->base_url($ctx->{env});
323 chop $base_url; # no trailing slash for "git clone"
324 my $dir = (split(m!/!, $base_url))[-1];
325 my %seen = ($base_url => 1);
326 my $top_url = $base_url;
327 $top_url =~ s!/[^/]+\z!/!;
328 $$txt .= "public-inbox mirroring instructions\n\n";
329 if ($ibx->can('cloneurl')) { # PublicInbox::Inbox
331 "This public inbox may be cloned and mirrored by anyone:\n";
333 my $max = $ibx->max_git_epoch;
334 # TODO: some of these URLs may be too long and we may need to
335 # do something like code_footer() above, but these are local
337 if (defined($max)) { # v2
338 for my $i (0..$max) {
339 # old epochs my be deleted:
340 -d "$ibx->{inboxdir}/git/$i.git" or next;
341 my $url = "$base_url/$i";
343 push @urls, "$url $dir/git/$i.git";
345 my $nr = scalar(@urls);
347 chomp($$txt .= <<EOM);
349 # this inbox consists of $nr epochs: (no need to clone all of them)
351 $urls[0] .= " # oldest";
352 $urls[-1] .= " # newest";
355 push @urls, $base_url;
357 # FIXME: epoch splits can be different in other repositories,
358 # use the "cloneurl" file as-is for now:
359 for my $u (@{$ibx->cloneurl}) {
364 $$txt .= join('', map { " git clone --mirror $_\n" } @urls);
365 my $addrs = $ibx->{address} // 'inbox@example.com';
366 my $ng = $ibx->{newsgroup} // '';
367 substr($ng, 0, 0, ' --ng ') if $ng;
368 $addrs = join(' ', @$addrs) if ref($addrs) eq 'ARRAY';
369 my $v = defined $max ? '-V2' : '-V1';
372 # If you have public-inbox 1.1+ installed, you may
373 # initialize and index your mirror using the following commands:
374 public-inbox-init $v$ng \\
375 $ibx->{name} ./$dir $base_url \\
377 public-inbox-index ./$dir
379 } else { # PublicInbox::ExtSearch
381 This is an external index which is an amalgamation of several public inboxes.
382 Each public inbox needs to be mirrored individually.
384 my $v = $ctx->{www}->{pi_cfg}->{lc('publicInbox.wwwListing')};
385 if (($v // '') =~ /\A(?:all|match=domain)\z/) {
387 A list of them is available at $top_url
391 my $cfg_link = "$base_url/_/text/config/raw";
394 Example config snippet for mirrors: $cfg_link
396 _add_non_http_urls($ctx, $txt);
397 _add_onion_note($txt);
399 my $code_url = prurl($ctx->{env}, $PublicInbox::WwwStream::CODE_URL);
400 $$txt .= join("\n\n",
401 coderepos_raw($ctx, $top_url), # may be empty
402 "AGPL code for this site:\n git clone $code_url");
406 sub _default_text ($$$$) {
407 my ($ctx, $key, $hdr, $txt) = @_;
408 if ($key eq 'mirror') {
409 return _mirror_help($ctx, $txt);
410 } elsif ($key eq 'color') {
411 return _colors_help($ctx, $txt);
412 } elsif ($key eq 'config') {
413 return $ctx->{ibx}->can('cloneurl') ?
414 inbox_config($ctx, $hdr, $txt) :
415 extindex_config($ctx, $hdr, $txt);
417 return if $key ne 'help'; # TODO more keys?
419 my $ibx = $ctx->{ibx};
420 my $base_url = $ibx->base_url($ctx->{env});
422 public-inbox help for $base_url
427 public-inbox uses Message-ID identifiers in URLs.
428 One may look up messages by substituting Message-IDs
429 (without the leading '<' or trailing '>') into the URL.
430 Forward slash ('/') characters in the Message-IDs
431 need to be escaped as "%2F" (without quotes).
433 Thus, it is possible to retrieve any message by its
434 Message-ID by going to:
436 $base_url<Message-ID>/
437 (without the '<' or '>')
439 Message-IDs are described at:
445 # n.b. we use the Xapian DB for any regeneratable,
446 # order-of-arrival-independent data.
452 This public-inbox has search functionality provided by Xapian.
454 It supports typical AND, OR, NOT, '+', '-' queries present
455 in other search engines.
457 We also support search prefixes to limit the scope of the
458 search to certain fields.
460 Prefixes supported in this installation include:
463 _srch_prefix($ibx, $txt);
466 Most prefixes are probabilistic, meaning they support stemming
467 and wildcards ('*'). Ranges (such as 'd:') and boolean prefixes
468 do not support stemming or wildcards.
469 The upstream Xapian query parser documentation fully explains
481 Message threading is enabled for this public-inbox,
482 additional endpoints for message threads are available:
484 * $base_url<Message-ID>/T/#u
486 Loads the thread belonging to the given <Message-ID>
487 in flat chronological order. The "#u" anchor
488 focuses the browser on the given <Message-ID>.
490 * $base_url<Message-ID>/t/#u
492 Loads the thread belonging to the given <Message-ID>
493 in threaded order with nesting. For deep threads,
494 this requires a wide display or horizontal scrolling.
496 Both of these HTML endpoints are suitable for offline reading
497 using the thread overview at the bottom of each page.
499 The gzipped mbox for a thread is available for downloading and
500 importing into your favorite mail client:
502 * $base_url<Message-ID>/t.mbox.gz
504 We use the mboxrd variant of the mbox format described at:
508 Users of feed readers may follow a particular thread using:
510 * $base_url<Message-ID>/t.atom
512 Which loads the thread in Atom Syndication Standard
513 described at Wikipedia and RFC4287:
515 $WIKI_URL/Atom_(standard)
516 https://tools.ietf.org/html/rfc4287
518 Atom Threading Extensions (RFC4685) are supported:
520 https://tools.ietf.org/html/rfc4685
525 _add_non_http_urls($ctx, \(my $note = ''));
526 $note and $note =~ s/^/ /gms and $$txt .= <<EOF;
535 This help text is maintained by public-inbox developers
536 reachable via plain-text email at: meta\@public-inbox.org
537 Their inbox is archived at: https://public-inbox.org/meta/
539 # TODO: support admin contact info in ~/.public-inbox/config