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package Plack::Handler::Uwsgi;
use strict;
use warnings;
use IO::Socket::INET;
use HTTP::Status;
use Plack::Util;
sub new {
my $class = shift;
my $self = bless {@_}, $class;
$self;
}
sub run {
my ($self, $app) = @_;
my $server;
if (exists($ENV{'UWSGI_FD'})) {
$server = IO::Socket::UNIX->new_from_fd($ENV{'UWSGI_FD'}, '+<');
}
else {
$server = IO::Socket::INET->new(LocalPort => $self->{port}, LocalAddr => $self->{host}, Listen => 100, ReuseAddr => 1);
}
while ( my $client = $server->accept ) {
my $head = '';
my $remains = 4;
while($remains) {
$client->recv(my $buf, $remains);
last unless $buf;
$head.=$buf;
$remains -= length($buf);
}
if (length($head) != 4) {
$client->close;
next;
}
my ($mod1, $envsize, $mod2) = unpack('CvC', $head);
unless ($envsize) {
$client->close;
next;
}
$remains = $envsize;
my $envbuf = '';
while($remains) {
my $buf;
if ($remains >= 4096) {
$client->recv($buf, 4096);
}
else {
$client->recv($buf, $remains);
}
unless($buf) {
$client->close;
next;
}
$envbuf.=$buf;
$remains -= length($buf);
}
if (length($envbuf) != $envsize ) {
$client->close;
next;
}
my %env;
my $i = 0;
while($i < $envsize) {
my $kl = unpack('v', substr($envbuf, $i, 2)); $i+=2;
my $key = substr($envbuf, $i, $kl); $i+=$kl;
my $vl = unpack('v', substr($envbuf, $i, 2)); $i+=2;
$env{$key} = substr($envbuf, $i, $vl); $i+=$vl;
}
my $env = {
%env,
'psgi.version' => [1,1],
'psgi.url_scheme' => ($env{HTTPS}||'off') =~ /^(?:on|1)$/i ? 'https' : 'http',
'psgi.input' => $client,
'psgi.errors' => *STDERR,
'psgi.multithread' => Plack::Util::FALSE,
'psgi.multiprocess' => Plack::Util::TRUE,
'psgi.run_once' => Plack::Util::FALSE,
'psgi.streaming' => Plack::Util::TRUE,
'psgi.nonblocking' => Plack::Util::FALSE,
};
my $res = Plack::Util::run_app $app, $env;
if (ref $res eq 'ARRAY') {
$self->_handle_response($client, $env{'SERVER_PROTOCOL'}, $res);
}
elsif (ref $res eq 'CODE') {
$res->(sub {
$self->_handle_response($client, $env{'SERVER_PROTOCOL'}, $_[0]);
});
}
else {
die "Bad response $res";
}
$client->close;
}
}
sub _handle_response {
my ($self, $client, $protocol, $res) = @_;
$client->send($protocol.' '.$res->[0].' '.HTTP::Status::status_message( $res->[0] )."\r\n");
my $headers = $res->[1];
my $hdrs = '';
while (my ($k, $v) = splice @$headers, 0, 2) {
$hdrs .= "$k: $v\r\n";
}
$hdrs .= "\r\n";
$client->send($hdrs);
my $cb = sub { $client->send($_[0]) };
my $body = $res->[2];
if (defined $body) {
Plack::Util::foreach($body, $cb);
}
else {
return Plack::Util::inline_object write => $cb,close => sub { };
}
}
1;
|
