Created
November 27, 2018 17:56
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Websocket and Subprocess
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| #!/usr/bin/env perl | |
| use Mojolicious::Lite; | |
| use Mojo::IOLoop::Subprocess; | |
| get '/' => sub { | |
| my $c = shift; | |
| $c->render(template => 'index'); | |
| }; | |
| websocket '/ws' => sub { | |
| my $self = shift; | |
| app->log->debug(sprintf 'Client connected: %s', $self->tx); | |
| $self->on(finish => sub { | |
| app->log->debug('Client disconnected'); | |
| }); | |
| }; | |
| my $count = 0; | |
| Mojo::IOLoop->recurring(3 => sub { | |
| my $loop = shift; | |
| $count++; | |
| app->log->debug(sprintf('Notify %d', $count)); | |
| my @args = ( 'echo "hello" > /dev/null' ); | |
| my $subprocess = Mojo::IOLoop::Subprocess->new; | |
| $subprocess->run( | |
| sub { | |
| my $subprocess = shift; | |
| system(@args); | |
| return 'hello'; | |
| }, | |
| sub { | |
| my ($subprocess, $err, @results) = @_; | |
| app->log->error(sprintf('could not do command: %s', $err)) if $err; | |
| } | |
| ); | |
| }); | |
| app->start; | |
| __DATA__ | |
| @@ index.html.ep | |
| % layout 'default'; | |
| % title 'Welcome'; | |
| <h1>Welcome to the Mojolicious real-time web framework!</h1> | |
| <script> | |
| console.log("Application is running"); | |
| var ws = new WebSocket('<%= url_for('ws')->to_abs %>'); | |
| ws.onmessage = function(e){ | |
| var msg = JSON.parse(e.data); | |
| console.log(msg); | |
| }; | |
| </script> | |
| @@ layouts/default.html.ep | |
| <!DOCTYPE html> | |
| <html> | |
| <head><title><%= title %></title></head> | |
| <body><%= content %></body> | |
| </html> |
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