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package Plack::Client;
use strict;
use warnings;
# ABSTRACT: abstract interface to remote web servers and local PSGI apps
use HTTP::Message::PSGI;
use HTTP::Request;
use Plack::App::Proxy;
use Plack::Middleware::ContentLength;
use Plack::Response;
use Scalar::Util qw(blessed reftype);
=head1 SYNOPSIS
=head1 DESCRIPTION
=cut
sub new {
my $class = shift;
my %params = @_;
die 'apps must be a hashref'
if exists($params{apps}) && ref($params{apps}) ne 'HASH';
bless {
apps => $params{apps},
}, $class;
}
sub apps { shift->{apps} }
sub app_for {
my $self = shift;
my ($for) = @_;
return $self->apps->{$for};
}
sub request {
my $self = shift;
my ($app, $env) = $self->_parse_request_args(@_);
my $psgi_res = $self->_resolve_response($app->($env));
# is there a better place to do this? Plack::App::Proxy already takes care
# of this (since it's making a real http request)
$psgi_res->[2] = [] if $env->{REQUEST_METHOD} eq 'HEAD';
# XXX: or just return the arrayref?
return Plack::Response->new(@$psgi_res);
}
sub _parse_request_args {
my $self = shift;
if (blessed($_[0])) {
if ($_[0]->isa('HTTP::Request')) {
return $self->_request_from_http_request(@_);
}
elsif ($_[0]->isa('Plack::Request')) {
return $self->_request_from_plack_request(@_);
}
else {
die 'Request object must be either an HTTP::Request or a Plack::Request';
}
}
elsif ((reftype($_[0]) || '') eq 'HASH') {
return $self->_request_from_env(@_);
}
else {
return $self->_request_from_http_request_args(@_);
}
}
sub _request_from_http_request {
my $self = shift;
my ($http_request) = @_;
my $env = $self->_http_request_to_env($http_request);
return $self->_request_from_env($env);
}
sub _request_from_plack_request {
my $self = shift;
my ($req) = @_;
return ($self->_app_from_req($req), $req->env);
}
sub _request_from_env {
my $self = shift;
return $self->_request_from_plack_request(Plack::Request->new(@_));
}
sub _request_from_http_request_args {
my $self = shift;
return $self->_request_from_http_request(HTTP::Request->new(@_));
}
sub _http_request_to_env {
my $self = shift;
my ($req) = @_;
my $scheme = $req->uri->scheme;
my $app_name;
# hack around with this - psgi requires a host and port to exist, and
# for the scheme to be either http or https
if ($scheme eq 'psgi-local') {
$app_name = $req->uri->authority;
$req->uri->scheme('http');
$req->uri->host('Plack::Client');
$req->uri->port(-1);
}
elsif ($scheme eq 'psgi-local-ssl') {
$app_name = $req->uri->authority;
$req->uri->scheme('https');
$req->uri->host('Plack::Client');
$req->uri->port(-1);
}
elsif ($scheme ne 'http' && $scheme ne 'https') {
die 'Invalid URL scheme ' . $scheme;
}
# work around http::message::psgi bug - see github issue 163 for plack
if (!$req->uri->path) {
$req->uri->path('/');
}
my $env = $req->to_psgi;
# work around http::message::psgi bug - see github issue 150 for plack
$env->{CONTENT_LENGTH} ||= length($req->content);
$env->{'plack.client.url_scheme'} = $scheme;
$env->{'plack.client.app_name'} = $app_name
if defined $app_name;
return $env;
}
sub _app_from_req {
my $self = shift;
my ($req) = @_;
my $uri = $req->uri;
my $scheme = $req->env->{'plack.client.url_scheme'} || $uri->scheme;
my $app_name = $req->env->{'plack.client.app_name'};
my $app;
if ($scheme eq 'psgi-local') {
if (!defined $app_name) {
$app_name = $uri->authority;
$app_name =~ s/(.*):.*/$1/; # in case a port was added at some point
}
$app = $self->app_for($app_name);
die "Unknown app: $app_name" unless $app;
$app = Plack::Middleware::ContentLength->wrap($app);
}
elsif ($scheme eq 'http' || $scheme eq 'https') {
my $uri = $uri->clone;
$uri->path('/');
$app = Plack::App::Proxy->new(remote => $uri->as_string)->to_app;
}
die "Couldn't find app" unless $app;
return $app;
}
sub _resolve_response {
my $self = shift;
my ($psgi_res) = @_;
if (ref($psgi_res) eq 'CODE') {
my $body = [];
$psgi_res->(sub {
$psgi_res = shift;
return Plack::Util::inline_object(
write => sub { push @$body, $_[0] },
close => sub { push @$psgi_res, $body },
);
});
}
use Data::Dumper; die Dumper($psgi_res) unless ref($psgi_res) eq 'ARRAY';
return $psgi_res;
}
sub get { shift->request('GET', @_) }
sub head { shift->request('HEAD', @_) }
sub post { shift->request('POST', @_) }
sub put { shift->request('PUT', @_) }
sub delete { shift->request('DELETE', @_) }
=head1 BUGS
No known bugs.
Please report any bugs through RT: email
C<bug-plack-client at rt.cpan.org>, or browse to
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Plack-Client>.
=head1 SEE ALSO
L<Plack>
L<HTTP::Request>
=head1 SUPPORT
You can find this documentation for this module with the perldoc command.
perldoc Plack::Client
You can also look for information at:
=over 4
=item * AnnoCPAN: Annotated CPAN documentation
L<http://annocpan.org/dist/Plack-Client>
=item * CPAN Ratings
L<http://cpanratings.perl.org/d/Plack-Client>
=item * RT: CPAN's request tracker
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Plack-Client>
=item * Search CPAN
L<http://search.cpan.org/dist/Plack-Client>
=back
=head1 AUTHOR
Jesse Luehrs <doy at tozt dot net>
=cut
1;
|
