http://www.perlmonks.org?node_id=1110901


in reply to Re^3: real-time output from Mojolicious WebSockets?
in thread real-time output from Mojolicious WebSockets?

ok, timer is concurrent, for delay after N seconds its a bit more typing (should be some kind of helper ) ... but this is still cooperative multitasking type deal, if any one of your steps blocks, well, then it blocks :) got to this from https://metacpan.org/pod/Mojolicious::Guides::Cookbook#REAL-TIME-WEB

There might be better ways ... its best to consult mojo irc channel for that ... maybe check the logs at http://irclog.perlgeek.de/mojo 

#!/usr/bin/perl --
# Automatically enables "strict", "warnings", "utf8" and Perl 5.10 fea
+tures
use Mojolicious::Lite;

Main( @ARGV );
exit( 0 );

sub myapp {
    my $tx = shift;
    $tx->send( "Entering myapp." );
    my @delays;
    foreach my $xx ( 0 .. 3 ) {
        $tx->send( "$xx...".localtime() );
#~ https://metacpan.org/pod/Mojo::IOLoop#delay
#~ https://metacpan.org/pod/Mojo::IOLoop::Delay
        push @delays, sub {
            my ($delay, @args) = @_;
            Mojo::IOLoop->timer( 3 => $delay->begin );
            $tx->send( "after 3 $xx...".localtime() );
        };
    }
    $tx->send( "Leaving myapp." );
    Mojo::IOLoop->delay( @delays )->wait;
    return "You should never see this.";
} ## end sub myapp

sub Main {
    get '/'     => sub { my $c = shift; $c->render( 'index' ); };
    get '/log2' => sub { my $c = shift; $c->render( 'log2' ); };
    websocket '/log3' => \&ws_log4;

    app->secrets( [ 'password' => '8675309J' ] );
    app->start;
} ## end sub Main


sub ws_log4 {
    my $self = shift;
    my $tx   = $self->tx;
    my $ip   = $tx->remote_address;
    app->log->debug( "Client '$ip' connected" );
    $tx->send( "Entering log4." );
    $self->inactivity_timeout( 50 );
    
    Mojo::IOLoop->timer( 2 => sub { myapp( $tx ) } ); ## get started
    
    $self->on(
        finish => sub {
            my( $c, $code, $reason ) = @_;
            $c->app->log->debug( "WebSocket closed with status $code."
+ );
        }
    );
    $tx->send( "Leaving log4." );
} ## end sub ws_log4
__DATA__

@@ index.html.ep

    <html>
        <head>            <title>Static Page</title>
        </head>
        <body>
            <h1>Index Page</h1>
            <p>This is a static page.
For WebSockets example, click                 <a href="/log2">here</a>
+.
            </p>
        </body>
    </html>


@@ log2.html.ep

    <html>
        <head>            <title>WebSockets Example</title>

%= javascript '/mojo/jquery/jquery.js'
        </head>
        <body>
            <p> wait for it )
            <form><textarea id="result" cols="70" rows="30"></textarea
+></form>
              %= javascript begin
                var ws = new WebSocket('<%= url_for('log3')->to_abs %>
+');
                ws.onopen = function() {
                    $('#result').text("Connection open.");
                    ws.send("Hi.");
                };
                ws.onmessage = function (e) {
                    // $('#result').append( "\n" + ( (new Date()).toIS
+OString() ) + " : " + e.data);
                    $('#result').append( "\n" + ( (new Date()).toLocal
+eString() ) + " : " + e.data);
                };
              % end
        </body>
    </html>

[download]

In Section Seekers of Perl Wisdom