X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FGitHTTPBackend.pm;h=ba3a8f208949aeac9a67a3bf5e8bfaf24b54e217;hb=96b0a14be7e62742ad06f0a37c3cba61fe6c51e7;hp=a2a81f8ea66a2dbe3ed81f885a5fda945e71bb38;hpb=e56b908c0e97c2f479b350dfb0868bc463413b89;p=public-inbox.git diff --git a/lib/PublicInbox/GitHTTPBackend.pm b/lib/PublicInbox/GitHTTPBackend.pm index a2a81f8e..ba3a8f20 100644 --- a/lib/PublicInbox/GitHTTPBackend.pm +++ b/lib/PublicInbox/GitHTTPBackend.pm @@ -1,17 +1,18 @@ -# Copyright (C) 2016-2018 all contributors +# Copyright (C) 2016-2021 all contributors # License: AGPL-3.0+ # 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); @@ -31,24 +32,9 @@ 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-[A-Za-z0-9_]+-pack\z/ || @@ -60,16 +46,7 @@ sub serve { 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; @@ -80,44 +57,6 @@ sub cache_one_year { '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, $path) = @_; @@ -134,53 +73,18 @@ sub serve_dumb { cache_one_year($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 @@ -192,6 +96,7 @@ sub serve_smart { foreach my $name (qw(QUERY_STRING REMOTE_USER REMOTE_ADDR HTTP_CONTENT_ENCODING + HTTP_GIT_PROTOCOL CONTENT_TYPE SERVER_PROTOCOL REQUEST_METHOD)) { @@ -203,11 +108,7 @@ sub serve_smart { $env{PATH_TRANSLATED} = "$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 { @@ -215,39 +116,19 @@ 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: $!"); - return; - } - } - } - unless (defined(sysseek($in, 0, SEEK_SET))) { - err($env, "error seeking temporary file: $!"); - return; + print $in $buf // return ucarp("print: $!"); } - { 0 => fileno($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 {