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package Web::Dispatch; |
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use Sub::Quote; |
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use Scalar::Util qw(blessed); |
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sub MAGIC_MIDDLEWARE_KEY { __PACKAGE__.'.middleware' } |
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use Moo; |
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use Web::Dispatch::Parser; |
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use Web::Dispatch::Node; |
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11730
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with 'Web::Dispatch::ToApp'; |
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has dispatch_app => ( |
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is => 'lazy', builder => sub { shift->dispatch_object->to_app } |
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); |
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has dispatch_object => (is => 'ro', required => 0, weak_ref => 1); |
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has parser_class => ( |
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is => 'ro', default => quote_sub q{ 'Web::Dispatch::Parser' } |
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); |
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has node_class => ( |
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is => 'ro', default => quote_sub q{ 'Web::Dispatch::Node' } |
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); |
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has _parser => (is => 'lazy'); |
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after BUILDARGS => sub { |
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my ( $self, %args ) = @_; |
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die "Either dispatch_app or dispatch_object need to be supplied." |
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if !$args{dispatch_app} and !$args{dispatch_object} |
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}; |
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sub _build__parser { |
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my ($self) = @_; |
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$self->parser_class->new; |
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} |
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sub call { |
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0
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my ($self, $env) = @_; |
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my $res = $self->_dispatch($env, $self->dispatch_app); |
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return $res->[0] if ref($res) eq 'ARRAY' and @{$res} == 1 and ref($res->[0]) eq 'CODE'; |
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return $res; |
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} |
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sub _dispatch { |
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my ($self, $env, @match) = @_; |
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while (defined(my $try = shift @match)) { |
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return $try if ref($try) eq 'ARRAY'; |
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if (ref($try) eq 'HASH') { |
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$env = { 'Web::Dispatch.original_env' => $env, %$env, %$try }; |
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next; |
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} |
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my @result = $self->_to_try($try, \@match)->($env, @match); |
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next unless @result and defined($result[0]); |
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my $first = $result[0]; |
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if (my $res = $self->_have_result($first, \@result, \@match, $env)) { |
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return $res; |
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} |
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# make a copy so we don't screw with it assigning further up |
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193
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my $env = $env; |
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862
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unshift @match, sub { $self->_dispatch($env, @result) }; |
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} |
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3
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return; |
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} |
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sub _have_result { |
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my ($self, $first, $result, $match, $env) = @_; |
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if (ref($first) eq 'ARRAY') { |
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return $first; |
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} |
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elsif (blessed($first) && $first->isa('Plack::Middleware')) { |
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return $self->_uplevel_middleware($first, $result); |
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} |
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elsif (ref($first) eq 'HASH' and $first->{+MAGIC_MIDDLEWARE_KEY}) { |
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return $self->_redispatch_with_middleware($first, $match, $env); |
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} |
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elsif ( |
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blessed($first) && |
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not($first->can('to_app')) && |
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not($first->isa('Web::Dispatch::Matcher')) |
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) { |
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return $first; |
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} |
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193
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430
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return; |
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} |
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sub _uplevel_middleware { |
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my ($self, $match, $results) = @_; |
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die "Multiple results but first one is a middleware ($match)" |
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if @{$results} > 1; |
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# middleware needs to uplevel exactly once to wrap the rest of the |
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# level it was created for - next elsif unwraps it |
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return { MAGIC_MIDDLEWARE_KEY, $match }; |
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} |
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103
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sub _redispatch_with_middleware { |
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my ($self, $first, $match, $env) = @_; |
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my $mw = $first->{+MAGIC_MIDDLEWARE_KEY}; |
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108
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5
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2
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$mw->app(sub { $self->_dispatch($_[0], @{$match}) }); |
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2
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109
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110
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return $mw->to_app->($env); |
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} |
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113
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sub _to_try { |
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537
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537
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491
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my ($self, $try, $more) = @_; |
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116
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# sub () {} becomes a dispatcher |
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# sub {} is a PSGI app and can be returned as is |
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# '' => sub {} becomes a dispatcher |
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# $obj isa WD:Predicates::Matcher => sub { ... } - become a dispatcher |
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# $obj w/to_app method is a Plack::App-like thing - call it to get a PSGI app |
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# |
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123
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537
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100
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66
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1238
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if (ref($try) eq 'CODE') { |
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100
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66
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100
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100
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100
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100
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124
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480
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706
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if (defined(my $proto = prototype($try))) { |
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132
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220
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$self->_construct_node(match => $proto, run => $try); |
126
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} else { |
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348
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748
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$try |
128
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} |
129
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} elsif (!ref($try) |
130
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and (ref($more->[0]) eq 'CODE' |
131
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or ($more->[0] and !ref($more->[0]) and $self->dispatch_object |
132
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and $self->dispatch_object->can($more->[0]))) |
133
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) { |
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4
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$self->_construct_node(match => $try, run => shift(@$more)); |
135
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} elsif ( |
136
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(blessed($try) && $try->isa('Web::Dispatch::Matcher')) |
137
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and (ref($more->[0]) eq 'CODE') |
138
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) { |
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88
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$self->_construct_node(match => $try, run => shift(@$more)); |
140
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} elsif (blessed($try) && $try->can('to_app')) { |
141
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7
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21
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$try->to_app; |
142
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} else { |
143
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4
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34
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die "No idea how we got here with $try"; |
144
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} |
145
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} |
146
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147
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sub _construct_node { |
148
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178
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178
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476
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my ($self, %args) = @_; |
149
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178
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100
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2589
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$args{match} = $self->_parser->parse($args{match}) if !ref $args{match}; |
150
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178
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100
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1075
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if ( my $obj = $self->dispatch_object) { |
151
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# if possible, call dispatchers as methods of the app object |
152
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177
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175
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my $dispatch_sub = $args{run}; |
153
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177
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91
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517
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$args{run} = sub { $obj->$dispatch_sub(@_) }; |
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203
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154
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} |
155
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178
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3090
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$self->node_class->new(\%args)->to_app; |
156
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} |
157
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158
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1; |