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package EntityModel::Web::PSGI; |
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# ABSTRACT: PSGI support for EntityModel::Web framework |
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use EntityModel::Class { |
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web => { type => 'EntityModel::Web' }, |
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template => { type => 'EntityModel::Template' }, |
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}; |
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use EntityModel::Web::Context; |
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use EntityModel::Web::Request; |
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use EntityModel::Web::Response; |
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our $VERSION = '0.002'; |
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=head1 NAME |
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EntityModel::Web::PSGI - serve L definitions through PSGI |
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=head1 VERSION |
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version 0.002 |
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=head1 SYNOPSIS |
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# execute via plackup for example: plackup ./app.psgi |
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use EntityModel; |
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use EntityModel::Web::PSGI; |
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# Load a model which includes a web definition |
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my $model = EntityModel->new->add_plugin(Web => { |
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})->load_from(JSON => { |
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file => $ENV{ENTITYMODEL_JSON_MODEL} |
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}); |
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# Create the PSGI wrapper |
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my $app = EntityModel::Web::PSGI->new; |
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# Set up web and template information |
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my ($web) = grep $_->isa('EntityModel::Web'), $model->plugin->list; |
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my $tmpl = EntityModel::Template->new( |
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include_path => $ENV{ENTITYMODEL_TEMPLATE_PATH} |
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); |
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$tmpl->process_template(\qq{[% PROCESS Main.tt2 %]}); |
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$app->template($tmpl); |
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$app->web($web); |
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# Return our PSGI coderef |
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sub { $app->run_psgi(@_) }; |
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=head1 DESCRIPTION |
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Preliminary support for running L definitions through |
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a PSGI interface. |
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Expects the L L attribute to be set before any |
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requests are served, with at least one site definition if you want this |
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to do anything useful. |
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Currently also proxies a L attribute, although expect this to |
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be deprecated in a future version (it really shouldn't be here). |
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=head1 METHODS |
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=head2 web |
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Accessor for the L definition used for this PSGI instance. |
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Returns $self if used as a mutator: |
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my $web; |
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$psgi->web($web)->psgi_request(...); |
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=head2 template |
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Accessor for the L definition used for this PSGI instance. |
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Returns $self if used as a mutator: |
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my $template; |
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warn $psgi->template($template)->web; |
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=cut |
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=head2 run_psgi |
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Process a PSGI request. Will be called by the L framework. |
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=cut |
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sub run_psgi { |
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my $self = shift; |
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my $env = shift; |
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# Populate initial request values from $env |
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my $req = EntityModel::Web::Request->new( |
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method => lc($env->{REQUEST_METHOD} || ''), |
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path => $env->{REQUEST_URI}, |
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version => $env->{SERVER_PROTOCOL}, |
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host => $env->{SERVER_NAME}, |
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port => $env->{SERVER_PORT}, |
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# Convert HTTP_SOME_HEADER to some_header |
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header => [ map {; /^HTTP_(.*)/ ? +{ name => lc($1), value => $env->{$1} } : () } keys %$env ], |
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); |
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# Create our context using this request information |
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my $ctx = EntityModel::Web::Context->new( |
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request => $req, |
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template => $self->template, |
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); |
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$ctx->find_page_and_data($self->web); |
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# Early return if we had no page match |
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return $self->psgi_result( |
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$env, |
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404, |
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[], |
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'Not found' |
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) unless $ctx->page; |
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# Prepare for page rendering |
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$ctx->resolve_data; |
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# Get a response object |
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my $resp = EntityModel::Web::Response->new( |
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context => $ctx, |
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page => $ctx->page, |
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request => $req, |
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); |
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# then ignore it and generate the body and a hardcoded 200 return |
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# FIXME use proper status code here and support streaming/async! |
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my $body = $ctx->process; |
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return $self->psgi_result( |
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$env, |
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200, |
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[ 'Content-Type' => 'text/html' ], |
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$body |
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); |
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} |
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=head2 psgi_result |
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Returns an appropriate PSGI response, either |
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an arrayref or a coderef depending on server |
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support for async/streaming. |
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=cut |
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sub psgi_result { |
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my $self = shift; |
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my ($env, $rslt, $hdr, $body) = @_; |
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logInfo("Streaming: %s", $env->{'psgi.streaming'} ? 'yes' : 'no'); |
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return [ $rslt, $hdr, [ $body ] ] unless $env->{'psgi.streaming'}; |
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return sub { |
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my $responder = shift; |
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my $writer = $responder->([ |
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$rslt, |
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$hdr, |
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]); |
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$writer->write($body); |
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$writer->close; |
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}; |
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} |
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1; |
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__END__ |