use strict;
use warnings FATAL => 'all';
+{
+ package Web::Simple::Dispatcher;
+
+ sub _is_dispatcher {
+ ref($_[1])
+ and "$_[1]" =~ /\w+=[A-Z]/
+ and $_[1]->isa(__PACKAGE__);
+ }
+
+ sub next {
+ @_ > 1
+ ? $_[0]->{next} = $_[1]
+ : shift->{next}
+ }
+
+ sub set_next {
+ $_[0]->{next} = $_[1];
+ $_[0]
+ }
+
+ sub dispatch {
+ my ($self, $env, @args) = @_;
+ my $next = $self->_has_match ? $self->next : undef;
+ if (my ($env_delta, @match) = $self->_match_against($env)) {
+ if (my ($result) = $self->_execute_with(@args, @match)) {
+ if ($self->_is_dispatcher($result)) {
+ $next = $result->set_next($next);
+ $env = { %$env, %$env_delta };
+ } else {
+ return $result;
+ }
+ }
+ }
+ return () unless $next;
+ return $next->dispatch($env, @args);
+ }
+
+ sub call {
+ @_ > 1
+ ? $_[0]->{call} = $_[1]
+ : shift->{call}
+ }
+
+ sub _has_match { $_[0]->{match} }
+
+ sub _match_against {
+ return ({}, $_[1]) unless $_[0]->{match};
+ $_[0]->{match}->($_[1]);
+ }
+
+ sub _execute_with {
+ $_[0]->{call}->(@_);
+ }
+}
+
sub new {
my ($class, $data) = @_;
my $config = { $class->_default_config, %{($data||{})->{config}||{}} };
bless({ config => $config }, $class);
}
+sub _setup_default_config {
+ my $class = shift;
+ {
+ no strict 'refs';
+ if (${"${class}::_default_config"}{CODE}) {
+ $class->_cannot_call_twice('_setup_default_config', 'default_config');
+ }
+ }
+ my @defaults = (@_, $class->_default_config);
+ {
+ no strict 'refs';
+ *{"${class}::_default_config"} = sub { @defaults };
+ }
+}
+
+sub _default_config { () }
+
sub config {
shift->{config};
}
sub _construct_response_filter {
- bless($_[1], 'Web::Simple::ResponseFilter');
-}
-
-sub _is_response_filter {
- # simple blessed() hack
- "$_[1]" =~ /\w+=[A-Z]/
- and $_[1]->isa('Web::Simple::ResponseFilter');
+ my $code = $_[1];
+ $_[0]->_build_dispatcher({
+ call => sub {
+ my ($d, $self, $env) = (shift, shift, shift);
+ my @next = $d->next->dispatch($env, $self, @_);
+ return unless @next;
+ $self->_run_with_self($code, @next);
+ },
+ });
}
sub _construct_redispatch {
- bless(\$_[1], 'Web::Simple::Redispatch');
-}
-
-sub _is_redispatch {
- return unless
- "$_[1]" =~ /\w+=[A-Z]/
- and $_[1]->isa('Web::Simple::Redispatch');
- return ${$_[1]};
+ my ($self, $new_path) = @_;
+ $self->_build_dispatcher({
+ call => sub {
+ shift;
+ my ($self, $env) = @_;
+ $self->_dispatch({ %{$env}, PATH_INFO => $new_path })
+ }
+ })
}
-sub _dispatch_parser {
+sub _build_dispatch_parser {
require Web::Simple::DispatchParser;
return Web::Simple::DispatchParser->new;
}
-sub _setup_dispatchables {
- my ($class, $dispatch_subs) = @_;
- my $parser = $class->_dispatch_parser;
- my @dispatchables;
- foreach my $dispatch_sub (@$dispatch_subs) {
- my $proto = prototype $dispatch_sub;
- my $matcher = (
- defined($proto)
- ? $parser->parse_dispatch_specification($proto)
- : sub { ({}) }
- );
- push @dispatchables, [ $matcher, $dispatch_sub ];
+sub _cannot_call_twice {
+ my ($class, $method, $sub) = @_;
+ my $error = "Cannot call ${method} twice for ${class}";
+ if ($sub) {
+ $error .= " - did you call Web::Simple's ${sub} export twice?";
}
+ die $error;
+}
+
+sub _setup_dispatcher {
+ my ($class, $dispatch_specs) = @_;
{
no strict 'refs';
- *{"${class}::_dispatchables"} = sub { @dispatchables };
+ if (${"${class}::_dispatcher"}{CODE}) {
+ $class->_cannot_call_twice('_setup_dispatcher', 'dispatch');
+ }
+ }
+ my $chain = $class->_build_dispatch_chain(
+ [ @$dispatch_specs, $class->_build_final_dispatcher ]
+ );
+ {
+ no strict 'refs';
+ *{"${class}::_dispatcher"} = sub { $chain };
}
}
-sub handle_request {
- my ($self, $env) = @_;
- $self->_run_dispatch_for($env, [ $self->_dispatchables ]);
-}
-
-sub _run_dispatch_for {
- my ($self, $env, $dispatchables) = @_;
- my @disp = @$dispatchables;
- while (my $disp = shift @disp) {
- my ($match, $run) = @{$disp};
- if (my ($env_delta, @args) = $match->($env)) {
- my $new_env = { %$env, %$env_delta };
- if (my ($result) = $self->_run_with_self($run, @args)) {
- if ($self->_is_response_filter($result)) {
- return $self->_run_with_self(
- $result,
- $self->_run_dispatch_for($new_env, \@disp)
- );
- } elsif (my $path = $self->_is_redispatch($result)) {
- $new_env->{PATH_INFO} = $path;
- return $self->_run_dispatch_for($new_env, $dispatchables);
- }
- return $result;
+sub _construct_subdispatch {
+ my ($class, $dispatch_spec) = @_;
+ my $disp = $class->_build_dispatcher_from_spec($dispatch_spec);
+ my $call = $disp->call;
+ $disp->call(sub {
+ my @res = $call->(@_);
+ return unless @res;
+ my $chain = $class->_build_dispatch_chain(@res);
+ return $class->_build_dispatcher({
+ call => sub {
+ my ($d, $self, $env) = (shift, shift, shift);
+ return $chain->dispatch($env, $self, @_);
}
- }
+ });
+ });
+ return $class->_build_dispatcher({
+ call => sub {
+ my ($d, $self, $env) = (shift, shift, shift);
+ my @sub = $disp->dispatch($env, $self, @_);
+ return @sub if @sub;
+ return unless (my $next = $d->next);
+ return $next->dispatch($env, $self, @_);
+ },
+ });
+}
+
+sub _build_dispatcher_from_spec {
+ my ($class, $spec) = @_;
+ return $spec unless ref($spec) eq 'CODE';
+ my $proto = prototype $spec;
+ my $parser = $class->_build_dispatch_parser;
+ my $matcher = (
+ defined($proto)
+ ? $parser->parse_dispatch_specification($proto)
+ : undef
+ );
+ return $class->_build_dispatcher({
+ match => $matcher,
+ call => sub { shift;
+ shift->_run_with_self($spec, @_)
+ },
+ });
+}
+
+sub _build_dispatch_chain {
+ my ($class, $dispatch_specs) = @_;
+ my ($root, $last);
+ foreach my $dispatch_spec (@$dispatch_specs) {
+ my $new = $class->_build_dispatcher_from_spec($dispatch_spec);
+ $root ||= $new;
+ $last = $last ? $last->next($new) : $new;
}
- return [
- 500, [ 'Content-type', 'text/plain' ],
- [ 'The management apologises but we have no idea how to handle that' ]
- ];
+ return $root;
+}
+
+sub _build_dispatcher {
+ bless($_[1], 'Web::Simple::Dispatcher');
+}
+
+sub _build_final_dispatcher {
+ shift->_build_dispatcher({
+ call => sub {
+ [
+ 500, [ 'Content-type', 'text/plain' ],
+ [ 'The management apologises but we have no idea how to handle that' ]
+ ]
+ }
+ })
+}
+
+sub _dispatch {
+ my ($self, $env) = @_;
+ $self->_dispatcher->dispatch($env, $self);
}
sub _run_with_self {
sub _run_cgi {
my $self = shift;
require Web::Simple::HackedPlack;
- Plack::Server::CGI->run(sub { $self->handle_request(@_) });
+ Plack::Server::CGI->run(sub { $self->_dispatch(@_) });
}
sub run {
my $self = shift;
if ($ENV{GATEWAY_INTERFACE}) {
- $self->_run_cgi;
+ return $self->_run_cgi;
}
- my $path = shift(@ARGV);
+ my $path = shift(@ARGV) or die "No path passed - use $0 / for root";
require HTTP::Request::AsCGI;
require HTTP::Request::Common;
projects / catagits/Web-Simple.git / blobdiff