-# Copyright (C) 2016-2018 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# when no endpoints match, fallback to this and serve a static file
# or smart HTTP. This is our wrapper for git-http-backend(1)
package PublicInbox::GitHTTPBackend;
use strict;
-use warnings;
+use v5.10.1;
use Fcntl qw(:seek);
-use IO::Handle;
+use IO::Handle; # ->flush
use HTTP::Date qw(time2str);
-use HTTP::Status qw(status_message);
-use Plack::Util;
use PublicInbox::Qspawn;
+use PublicInbox::Tmpfile;
+use PublicInbox::WwwStatic qw(r @NO_CACHE);
+use Carp ();
# 32 is same as the git-daemon connection limit
my $default_limiter = PublicInbox::Qspawn::Limiter->new(32);
objects/info/(?:http-alternates|alternates|packs)
cloneurl description];
-my @binary = qw!
- objects/[a-f0-9]{2}/[a-f0-9]{38}
- objects/pack/pack-[a-f0-9]{40}\.(?:pack|idx)
- !;
+my @binary = ('objects/[a-f0-9]{2}/[a-f0-9]{38,62}',
+ 'objects/pack/pack-[a-f0-9]{40,64}\.(?:pack|idx)');
our $ANY = join('|', @binary, @text, 'git-upload-pack');
-my $BIN = join('|', @binary);
my $TEXT = join('|', @text);
-my @no_cache = ('Expires', 'Fri, 01 Jan 1980 00:00:00 GMT',
- 'Pragma', 'no-cache',
- 'Cache-Control', 'no-cache, max-age=0, must-revalidate');
-
-sub r ($;$) {
- my ($code, $msg) = @_;
- $msg ||= status_message($code);
- my $len = length($msg);
- [ $code, [qw(Content-Type text/plain Content-Length), $len, @no_cache],
- [$msg] ]
-}
-
sub serve {
my ($env, $git, $path) = @_;
- # XXX compatibility... ugh, can we stop supporting this?
- $git = PublicInbox::Git->new($git) unless ref($git);
-
# Documentation/technical/http-protocol.txt in git.git
# requires one and exactly one query parameter:
- if ($env->{QUERY_STRING} =~ /\Aservice=git-\w+-pack\z/ ||
- $path =~ /\Agit-\w+-pack\z/) {
+ if ($env->{QUERY_STRING} =~ /\Aservice=git-[A-Za-z0-9_]+-pack\z/ ||
+ $path =~ /\Agit-[A-Za-z0-9_]+-pack\z/) {
my $ok = serve_smart($env, $git, $path);
return $ok if $ok;
}
serve_dumb($env, $git, $path);
}
-sub err ($@) {
- my ($env, @msg) = @_;
- $env->{'psgi.errors'}->print(@msg, "\n");
-}
-
-sub drop_client ($) {
- if (my $io = $_[0]->{'psgix.io'}) {
- $io->close; # this is PublicInbox::DS::close
- }
-}
+sub ucarp { Carp::carp(@_); undef }
my $prev = 0;
my $exp;
'Cache-Control', 'public, max-age=31536000';
}
-sub static_result ($$$$) {
- my ($env, $h, $f, $type) = @_;
- return r(404) unless -f $f && -r _; # just in case it's a FIFO :P
-
- # TODO: If-Modified-Since and Last-Modified?
- open my $in, '<', $f or return r(404);
- my $size = -s $in;
- my $len = $size;
- my $code = 200;
- push @$h, 'Content-Type', $type;
- if (($env->{HTTP_RANGE} || '') =~ /\bbytes=([0-9]*)-([0-9]*)\z/) {
- ($code, $len) = prepare_range($env, $in, $h, $1, $2, $size);
- if ($code == 416) {
- push @$h, 'Content-Range', "bytes */$size";
- return [ 416, $h, [] ];
- }
- }
- push @$h, 'Content-Length', $len;
- my $n = 65536;
- [ $code, $h, Plack::Util::inline_object(close => sub { close $in },
- getline => sub {
- return if $len == 0;
- $n = $len if $len < $n;
- my $r = sysread($in, my $buf, $n);
- if (!defined $r) {
- err($env, "$f read error: $!");
- } elsif ($r <= 0) {
- err($env, "$f EOF with $len bytes left");
- } else {
- $len -= $r;
- $n = 8192;
- return $buf;
- }
- drop_client($env);
- return;
- })]
-}
-
sub serve_dumb {
my ($env, $git, $path) = @_;
my $h = [];
my $type;
- if ($path =~ m!\Aobjects/[a-f0-9]{2}/[a-f0-9]{38}\z!) {
+ if ($path =~ m!\Aobjects/[a-f0-9]{2}/[a-f0-9]{38,62}\z!) {
$type = 'application/x-git-loose-object';
cache_one_year($h);
- } elsif ($path =~ m!\Aobjects/pack/pack-[a-f0-9]{40}\.pack\z!) {
+ } elsif ($path =~ m!\Aobjects/pack/pack-[a-f0-9]{40,64}\.pack\z!) {
$type = 'application/x-git-packed-objects';
cache_one_year($h);
- } elsif ($path =~ m!\Aobjects/pack/pack-[a-f0-9]{40}\.idx\z!) {
+ } elsif ($path =~ m!\Aobjects/pack/pack-[a-f0-9]{40,64}\.idx\z!) {
$type = 'application/x-git-packed-objects-toc';
cache_one_year($h);
} elsif ($path =~ /\A(?:$TEXT)\z/o) {
$type = 'text/plain';
- push @$h, @no_cache;
+ push @$h, @NO_CACHE;
} else {
return r(404);
}
-
- static_result($env, $h, "$git->{git_dir}/$path", $type);
+ $path = "$git->{git_dir}/$path";
+ PublicInbox::WwwStatic::response($env, $h, $path, $type);
}
-sub prepare_range {
- my ($env, $in, $h, $beg, $end, $size) = @_;
- my $code = 200;
- my $len = $size;
- if ($beg eq '') {
- if ($end ne '') { # "bytes=-$end" => last N bytes
- $beg = $size - $end;
- $beg = 0 if $beg < 0;
- $end = $size - 1;
- $code = 206;
- } else {
- $code = 416;
- }
- } else {
- if ($beg > $size) {
- $code = 416;
- } elsif ($end eq '' || $end >= $size) {
- $end = $size - 1;
- $code = 206;
- } elsif ($end < $size) {
- $code = 206;
- } else {
- $code = 416;
- }
- }
- if ($code == 206) {
- $len = $end - $beg + 1;
- if ($len <= 0) {
- $code = 416;
- } else {
- sysseek($in, $beg, SEEK_SET) or return [ 500, [], [] ];
- push @$h, qw(Accept-Ranges bytes Content-Range);
- push @$h, "bytes $beg-$end/$size";
-
- # FIXME: Plack::Middleware::Deflater bug?
- $env->{'psgix.no-compress'} = 1;
- }
- }
- ($code, $len);
+sub git_parse_hdr { # {parse_hdr} for Qspawn
+ my ($r, $bref, $dumb_args) = @_;
+ my $res = parse_cgi_headers($r, $bref) or return; # incomplete
+ $res->[0] == 403 ? serve_dumb(@$dumb_args) : $res;
}
# returns undef if 403 so it falls back to dumb HTTP
foreach my $name (qw(QUERY_STRING
REMOTE_USER REMOTE_ADDR
HTTP_CONTENT_ENCODING
+ HTTP_GIT_PROTOCOL
CONTENT_TYPE
SERVER_PROTOCOL
REQUEST_METHOD)) {
$env{PATH_TRANSLATED} = "$git->{git_dir}/$path";
my $rdr = input_prepare($env) or return r(500);
my $qsp = PublicInbox::Qspawn->new([qw(git http-backend)], \%env, $rdr);
- $qsp->psgi_return($env, $limiter, sub {
- my ($r, $bref) = @_;
- my $res = parse_cgi_headers($r, $bref) or return; # incomplete
- $res->[0] == 403 ? serve_dumb($env, $git, $path) : $res;
- });
+ $qsp->psgi_return($env, $limiter, \&git_parse_hdr, [$env, $git, $path]);
}
sub input_prepare {
my $input = $env->{'psgi.input'};
my $fd = eval { fileno($input) };
- if (defined $fd && $fd >= 0) {
- return { 0 => $fd };
- }
- open(my $in, '+>', undef);
- unless (defined $in) {
- err($env, "could not open temporary file: $!");
- return;
- }
+ return { 0 => $fd } if (defined $fd && $fd >= 0);
+ my $id = "git-http.input.$env->{REMOTE_ADDR}:$env->{REMOTE_PORT}";
+ my $in = tmpfile($id) // return ucarp("tmpfile: $!");
my $buf;
while (1) {
- my $r = $input->read($buf, 8192);
- unless (defined $r) {
- err($env, "error reading input: $!");
- return;
- }
+ my $r = $input->read($buf, 8192) // return ucarp("read $!");
last if $r == 0;
- my $off = 0;
- while ($r > 0) {
- my $w = syswrite($in, $buf, $r, $off);
- if (defined $w) {
- $r -= $w;
- $off += $w;
- } else {
- err($env, "error writing temporary file: $!");
- return;
- }
- }
+ print $in $buf // return ucarp("print: $!");
}
- unless (defined(sysseek($in, 0, SEEK_SET))) {
- err($env, "error seeking temporary file: $!");
- return;
- }
- { 0 => fileno($in), -hold => $in };
+ # ensure it's visible to git-http-backend(1):
+ $in->flush // return ucarp("flush: $!");
+ sysseek($in, 0, SEEK_SET) // return ucarp($env, "seek: $!");
+ { 0 => $in };
}
-sub parse_cgi_headers {
- my ($r, $bref) = @_;
+sub parse_cgi_headers { # {parse_hdr} for Qspawn
+ my ($r, $bref, $ctx) = @_;
return r(500) unless defined $r && $r >= 0;
$$bref =~ s/\A(.*?)\r?\n\r?\n//s or return $r == 0 ? r(500) : undef;
my $h = $1;
push @h, $k, $v;
}
}
- [ $code, \@h ]
+
+ # fallback to WwwCoderepo if cgit 404s. Duplicating $ctx prevents
+ # ->finalize from the current Qspawn from using qspawn.wcb.
+ # This makes qspawn skip ->async_pass and causes
+ # PublicInbox::HTTPD::Async::event_step to close shortly after
+ if ($code == 404 && $ctx->{www} && !$ctx->{_coderepo_tried}++) {
+ my $wcb = delete $ctx->{env}->{'qspawn.wcb'};
+ $ctx->{env}->{'plack.skip-deflater'} = 1; # prevent 2x gzip
+ $ctx->{env}->{'qspawn.fallback'} = $code;
+ my $res = $ctx->{www}->coderepo->srv($ctx);
+ # for ->psgi_return_init_cb
+ $ctx->{env}->{'qspawn.wcb'} = $wcb;
+ $res; # CODE or ARRAY ref
+ } else {
+ [ $code, \@h ]
+ }
}
1;