Think twice before "improving" anything Haarg has committed
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2 changed files with 55 additions and 62 deletions
113
lib/WebGUI.pm
113
lib/WebGUI.pm
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@ -62,71 +62,60 @@ has site => (
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);
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sub prepare_app {
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my $self = shift;
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# WebGUI is a PSGI app is a Perl code reference. Let's create one (once).
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# Each web request results in a call to this sub
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$self->{psgi_app} = sub {
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my $env = shift;
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# Use the PSGI callback style response, which allows for nice things like
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# delayed response/streaming body (server push). For now we just use this for
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# unbuffered response writing
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return sub {
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my $responder = shift;
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my $session = $env->{'webgui.session'}
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or die 'Missing WebGUI Session - check WebGUI::Middleware::Session';
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# Handle the request
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handle($session);
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# Construct the PSGI response
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my $response = $session->response;
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my $psgi_response = $response->finalize;
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# See if the content handler is doing unbuffered response writing
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if ( $response->streaming ) {
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try {
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# Ask PSGI server for a streaming writer object by returning only the first
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# two elements of the array reference
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my $writer = $responder->( [ $psgi_response->[0], $psgi_response->[1] ] );
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# Store the writer object in the WebGUI::Session::Response object
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$response->writer($writer);
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# Now call the callback that does the streaming
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$response->streamer->($session);
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# And finally, clean up
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$writer->close;
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}
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catch {
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if ($response->writer) {
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# Response has already been started, so log error and close writer
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$session->request->TRACE("Error detected after streaming response started");
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$response->writer->close;
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}
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else {
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$responder->( [ 500, [ 'Content-Type' => 'text/plain' ], [ "Internal Server Error" ] ] );
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}
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};
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}
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else {
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# Not streaming, so immediately tell the callback to return
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# the response. In the future we could use an Event framework here
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# to make this a non-blocking delayed response.
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$responder->($psgi_response);
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}
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};
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};
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}
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# Each web request results in a call to this sub
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# Each web request results in a call to this sub
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sub call {
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sub call {
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my $self = shift;
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my $self = shift;
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return $self->{psgi_app}->(@_);
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my $env = shift;
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# Use the PSGI callback style response, which allows for nice things like
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# delayed response/streaming body (server push). For now we just use this for
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# unbuffered response writing
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return sub {
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my $responder = shift;
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my $session = $env->{'webgui.session'}
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or die 'Missing WebGUI Session - check WebGUI::Middleware::Session';
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# Handle the request
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handle($session);
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# Construct the PSGI response
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my $response = $session->response;
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my $psgi_response = $response->finalize;
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# See if the content handler is doing unbuffered response writing
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if ( $response->streaming ) {
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try {
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# Ask PSGI server for a streaming writer object by returning only the first
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# two elements of the array reference
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my $writer = $responder->( [ $psgi_response->[0], $psgi_response->[1] ] );
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# Store the writer object in the WebGUI::Session::Response object
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$response->writer($writer);
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# Now call the callback that does the streaming
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$response->streamer->($session);
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# And finally, clean up
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$writer->close;
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}
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catch {
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if ($response->writer) {
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# Response has already been started, so log error and close writer
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$session->request->TRACE("Error detected after streaming response started");
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$response->writer->close;
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}
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else {
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$responder->( [ 500, [ 'Content-Type' => 'text/plain' ], [ "Internal Server Error" ] ] );
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}
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};
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}
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else {
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# Not streaming, so immediately tell the callback to return
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# the response. In the future we could use an Event framework here
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# to make this a non-blocking delayed response.
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$responder->($psgi_response);
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}
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};
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}
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}
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sub handle {
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sub handle {
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@ -2,9 +2,13 @@ use strict;
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use Plack::Builder;
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use Plack::Builder;
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use Plack::App::File;
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use Plack::App::File;
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use WebGUI;
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use WebGUI;
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# Temporary preload hack
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use WebGUI::Paths -preload;
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use WebGUI::Paths -preload;
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use DBI;
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use DBI;
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DBI->install_driver("mysql");
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DBI->install_driver("mysql");
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# end hack
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use WebGUI::Middleware::Debug::Performance;
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use WebGUI::Middleware::Debug::Performance;
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my $config = $ENV{WEBGUI_CONFIG};
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my $config = $ENV{WEBGUI_CONFIG};
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