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Apache2.pm
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Apache2.pm
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package Plack::Handler::Apache2;
use strict;
use warnings;
use Apache2::RequestRec;
use Apache2::RequestIO;
use Apache2::RequestUtil;
use Apache2::Response;
use Apache2::Const -compile => qw(OK);
use Apache2::Log;
use APR::Table;
use IO::Handle;
use Plack::Util;
use Scalar::Util;
use URI;
use URI::Escape;
my %apps; # psgi file to $app mapping
sub new { bless {}, shift }
sub preload {
my $class = shift;
for my $app (@_) {
$class->load_app($app);
}
}
sub load_app {
my($class, $app) = @_;
return $apps{$app} ||= do {
# Trick Catalyst, CGI.pm, CGI::Cookie and others that check
# for $ENV{MOD_PERL}.
#
# Note that we delete it instead of just localizing
# $ENV{MOD_PERL} because some users may check if the key
# exists, and we do it this way because "delete local" is new
# in 5.12:
# http://perldoc.perl.org/5.12.0/perldelta.html#delete-local
local $ENV{MOD_PERL};
delete $ENV{MOD_PERL};
Plack::Util::load_psgi $app;
};
}
sub call_app {
my ($class, $r, $app) = @_;
$r->subprocess_env; # let Apache create %ENV for us :)
my $env = {
%ENV,
'psgi.version' => [ 1, 1 ],
'psgi.url_scheme' => ($ENV{HTTPS}||'off') =~ /^(?:on|1)$/i ? 'https' : 'http',
'psgi.input' => $r,
'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,
'psgix.harakiri' => Plack::Util::TRUE,
'psgix.cleanup' => Plack::Util::TRUE,
'psgix.cleanup.handlers' => [],
};
if (defined(my $HTTP_AUTHORIZATION = $r->headers_in->{Authorization})) {
$env->{HTTP_AUTHORIZATION} = $HTTP_AUTHORIZATION;
}
# If you supply more than one Content-Length header Apache will
# happily concat the values with ", ", e.g. "72, 72". This
# violates the PSGI spec so fix this up and just take the first
# one.
if (exists $env->{CONTENT_LENGTH} && $env->{CONTENT_LENGTH} =~ /,/) {
no warnings qw(numeric);
$env->{CONTENT_LENGTH} = int $env->{CONTENT_LENGTH};
}
# Actually, we can not trust PATH_INFO from mod_perl because mod_perl squeezes multiple slashes into one slash.
my $uri = URI->new("http://".$r->hostname.$r->unparsed_uri);
$env->{PATH_INFO} = uri_unescape($uri->path);
$class->fixup_path($r, $env);
my $res = $app->($env);
if (ref $res eq 'ARRAY') {
_handle_response($r, $res);
}
elsif (ref $res eq 'CODE') {
$res->(sub {
_handle_response($r, $_[0]);
});
}
else {
die "Bad response $res";
}
if (@{ $env->{'psgix.cleanup.handlers'} }) {
$r->push_handlers(
PerlCleanupHandler => sub {
for my $cleanup_handler (@{ $env->{'psgix.cleanup.handlers'} }) {
$cleanup_handler->($env);
}
if ($env->{'psgix.harakiri.commit'}) {
$r->child_terminate;
}
},
);
} else {
if ($env->{'psgix.harakiri.commit'}) {
$r->child_terminate;
}
}
return Apache2::Const::OK;
}
sub handler {
my $class = __PACKAGE__;
my $r = shift;
my $psgi = $r->dir_config('psgi_app');
$class->call_app($r, $class->load_app($psgi));
}
# The method for PH::Apache2::Registry to override.
sub fixup_path {
my ($class, $r, $env) = @_;
# $env->{PATH_INFO} is created from unparsed_uri so it is raw.
my $path_info = $env->{PATH_INFO} || '';
# Get argument of <Location> or <LocationMatch> directive
# This may be string or regexp and we can't know either.
my $location = $r->location;
# Let's *guess* if we're in a LocationMatch directive
if ($location eq '/') {
# <Location /> could be handled as a 'root' case where we make
# everything PATH_INFO and empty SCRIPT_NAME as in the PSGI spec
$env->{SCRIPT_NAME} = '';
} elsif ($path_info =~ s{^($location)/?}{/}) {
$env->{SCRIPT_NAME} = $1 || '';
} else {
# Apache's <Location> is matched but here is not.
# This is something wrong. We can only respect original.
$r->server->log_error(
"Your request path is '$path_info' and it doesn't match your Location(Match) '$location'. " .
"This should be due to the configuration error. See perldoc Plack::Handler::Apache2 for details."
);
}
$env->{PATH_INFO} = $path_info;
}
sub _handle_response {
my ($r, $res) = @_;
my ($status, $headers, $body) = @{ $res };
my $hdrs = ($status >= 200 && $status < 300)
? $r->headers_out : $r->err_headers_out;
Plack::Util::header_iter($headers, sub {
my($h, $v) = @_;
if (lc $h eq 'content-type') {
$r->content_type($v);
} elsif (lc $h eq 'content-length') {
$r->set_content_length($v);
} else {
$hdrs->add($h => $v);
}
});
$r->status($status);
if (Scalar::Util::blessed($body) and $body->can('path') and my $path = $body->path) {
$r->sendfile($path);
} elsif (defined $body) {
Plack::Util::foreach($body, sub { $r->print(@_) });
$r->rflush;
}
else {
return Plack::Util::inline_object
write => sub { $r->print(@_); $r->rflush },
close => sub { $r->rflush };
}
return Apache2::Const::OK;
}
1;
__END__
=head1 NAME
Plack::Handler::Apache2 - Apache 2.0 handlers to run PSGI application
=head1 SYNOPSIS
<Location />
SetHandler perl-script
PerlResponseHandler Plack::Handler::Apache2
PerlSetVar psgi_app /path/to/app.psgi
</Location>
# Optional, preload the application in the parent like startup.pl
<Perl>
use Plack::Handler::Apache2;
Plack::Handler::Apache2->preload("/path/to/app.psgi");
</Perl>
=head1 DESCRIPTION
This is a handler module to run any PSGI application with mod_perl on Apache 2.x.
=head1 CREATING CUSTOM HANDLER
If you want to create a custom handler that loads or creates PSGI
applications using other means than loading from C<.psgi> files, you
can create your own handler class and use C<call_app> class method to
run your application.
package My::ModPerl::Handler;
use Plack::Handler::Apache2;
sub get_app {
# magic!
}
sub handler {
my $r = shift;
my $app = get_app();
Plack::Handler::Apache2->call_app($r, $app);
}
=head1 AUTHOR
Tatsuhiko Miyagawa
=head1 CONTRIBUTORS
Paul Driver
=head1 SEE ALSO
L<Plack>
=cut