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#!/usr/bin/perl |
package Frey::Server; |
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# "HTTP Push" is not readily attainable, so instead we will simulate it using a |
use Moose; |
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# long-pull, aka "Comet". The client browser simply opens an HTTP connection to |
extends 'Frey::Editor'; |
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# the server and waits for a response. The server doesn't respond until there |
with 'Frey::Config'; |
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# is some event (here a new message), giving the appearance of HTTP-push. |
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# |
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# Each user gets three continuations for these three cases: |
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# |
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# - Initial load or reload of the page |
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# - Sending a message (uses AJAX on the client) |
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# - Recieving messages (uses COMET on the client) |
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use strict; |
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use lib 'lib'; |
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use Continuity; |
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use Continuity::REPL; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use View; |
#use Carp::REPL; # 'nodie'; |
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use lib 'lib'; |
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use Frey::Run; |
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has 'port' => ( |
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documentation => 'port on which server listen', |
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is => 'ro', |
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isa => 'Int', |
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default => sub { |
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my $self = shift; |
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$ENV{FREY_PORT} || $self->config->{port} || 16001 |
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}, |
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); |
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use Template::Declare; |
has 'editor' => ( |
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use Template::Declare::Tags; # defaults to 'HTML' |
is => 'ro', |
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Template::Declare->init( roots => ['View']); |
isa => 'Frey::Editor', |
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warn "templates = ",dump( Template::Declare->templates ); |
lazy => 1, |
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default => sub { |
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my @messages; # Global (shared) list of messages |
Frey::Editor->new; |
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my $got_message; # Flag to indicate that there is a new message to display |
}, |
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use vars qw( $repl $server @messages ); |
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$repl = Continuity::REPL->new; |
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$server = Continuity->new( |
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port => 16001, |
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path_session => 1, |
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cookie_session => 'sid', |
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); |
); |
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$server->debug_level( 2 ); |
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$server->loop; |
=head2 request |
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# This is the main entrypoint. We are looking for one of three things -- a |
This is simple dispatcher for our server. Currently it's in flux and |
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# pushstream, a sent message, or a request for the main HTML. We delegate each |
documented only in source code. |
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# of these cases, none of which will return (they all loop forever). |
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sub main { |
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my ($req) = @_; |
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my $path = $req->request->url->path; |
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print STDERR "Path: '$path'\n"; |
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warn $req->request->header('User_Agent'); |
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#warn dump( $req ); |
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# If this is a request for the pushtream, then give them that |
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if($path =~ /pushstream/) { |
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pushstream($req); |
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} |
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# If they are sending us a message, we give them a thread for that too |
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if($path =~ /sendmessage/) { |
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send_message($req); |
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} |
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# Otherwise, lets give them the base page |
my $content_type = $self->request( $url, $params ); |
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send_base_page($req); |
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} |
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# Here we accept a connection to the browser, and keep it open. Meanwhile we |
=cut |
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# watch the global $got_message variable, and when it gets touched we send off |
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# the list of messages through the held-open connection. Then we let the |
sub print { |
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# browser open a new connection and begin again. |
my $self = shift; |
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sub pushstream { |
warn "# print ", join(' ', map { length $_ } @_ ); |
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my ($req) = @_; |
$self->{_print}->( @_ ); |
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# Set up watch event -- this will be triggered when $got_message is written |
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my $w = Coro::Event->var(var => \$got_message, poll => 'w'); |
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while(1) { |
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print STDERR "**** GOT MESSAGE, SENDING ****\n"; |
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my $log = join "<br>", @messages; |
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$req->print($log); |
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$req->next; |
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print STDERR "**** Waiting for got_message indicator ****\n"; |
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$w->next; |
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} |
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} |
} |
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sub request { |
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my ( $self, $url, $params ) = @_; |
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if ( my $ref = ref($url) ) { |
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die "url not URI but ", dump( $url ) unless $ref =~ m{^URI}; |
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} else { |
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$url = URI->new($url); |
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} |
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my $path = $url->path; |
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if ( $path =~ m{^/(favicon.ico|__history__.html)$} ) { |
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warn "INFO: $path ignored"; |
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return { code => 404, content_type => 'text/plain' }; |
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} |
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my $request = { |
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content_type => 'text/html', |
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code => 200, |
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}; |
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eval { |
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if ( $path =~ m{/reload(.*)} ) { |
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$ENV{FREY_NO_LOG} = 1; |
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my $cmd = "perl -c $0"; |
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warn "# check syntax with $cmd"; |
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if ( system($cmd) == 0 ) { |
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my $server = Frey::Server->new; |
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$self->load_config; |
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# Module::Reload->check; |
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warn "# reload done"; |
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$self->print( refresh( $1, 0 ) ); |
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return; |
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} else { |
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warn "ERROR: $?"; |
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} |
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$ENV{FREY_NO_LOG} = 0; |
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} elsif ( $path =~ m{/exit(.*)} ) { |
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# FIXME do we need some kind of check here for production? :-) |
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# ./bin/dev.sh will restart us during development |
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$self->print( refresh( $1, 2 ) ); |
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exit; |
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} |
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my $html; |
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sub rest2class { |
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my $class = shift; |
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$class =~ s/-/::/; # sigh! |
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return $class; |
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} |
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my $f; |
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# shared run params |
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my $run = { |
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request_url => $url, |
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# debug => 1, |
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}; |
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if ( |
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$path =~ m{/Frey[:-]+ObjectBrowser} |
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) { |
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$f = Frey::ObjectBrowser->new( fey_class => $params->{class} ); |
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# $f->request( $req ); |
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} elsif ( |
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$path =~ m{/Frey[:-]+ObjectDesigner} |
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) { |
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$f = Frey::ObjectDesigner->new( fey_class => $params->{class} ); |
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# $f->request( $req ); |
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} elsif ( $path =~ $self->editor->url_regex ) { |
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$self->print( $self->editor->command( $path ) ); |
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return; |
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} elsif ( |
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$path =~ m{/([^/]+)/(\w+)/?([^/]+)?} |
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) { |
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my $class = rest2class $1; |
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warn "# run $path -> $class $2"; |
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$run->{format} = $3 if $3; |
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foreach my $p ( keys %$params ) { |
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$run->{$p} = $params->{$p} if defined $params->{$p} && $params->{$p} ne ''; |
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} |
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$f = Frey::Run->new( class => $class, params => $run, run => $2 ); |
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} elsif ( |
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$path =~ m{/([^/]+)/?$} |
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) { |
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my $class = rest2class $1; |
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warn "# introspect $class"; |
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$run->{class} ||= $class; |
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$f = Frey::Run->new( class => 'Frey::Introspect', params => $run ); |
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} else { |
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$f = Frey::Run->new( class => 'Frey::Class::Browser', params => $run ); |
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} |
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if ( $f ) { |
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$f->clean_status; |
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# $f->add_status( { request => $req } ); |
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$f->status_parts; |
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if ( my $html = $f->html ) { |
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warn "## html ",length($html)," bytes"; |
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$self->print( $html ); |
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} else { |
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confess "no output from $f"; |
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} |
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} else { |
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confess "# can't call request on nothing!"; |
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} |
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$request->{content_type} = $f->content_type; |
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}; |
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if ( $@ ) { |
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warn "SERVER ERROR: $@"; |
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$self->print( qq|<pre class="frey-error">$@<pre>| ); |
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# Carp::REPL::repl; |
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return { |
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content_type => 'text/html', |
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code => 404, |
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} |
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} |
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# Watch for the user to send us a message. As soon as we get it, we add it to |
return $request; |
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# our list of messages and touch the $got_message flag to let all the |
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# pushstreams know. |
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sub send_message { |
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my ($req) = @_; |
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while(1) { |
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my $msg = $req->param('message'); |
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my $name = $req->param('username'); |
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if($msg) { |
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unshift @messages, "$name: $msg"; |
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pop @messages if $#messages > 15; # Only keep the recent 15 messages |
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} |
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$got_message = 1; |
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$req->print("Got it!"); |
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$req->next; |
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} |
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} |
} |
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# This isn't a pushstream, nor a new message. It is just the main page. We loop |
sub refresh { |
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# in case they ask for it multiple times :) |
my ( $url, $time ) = @_; |
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sub send_base_page { |
$url ||= '/'; |
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my ($req) = @_; |
$time ||= 0; |
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while(1) { |
warn "# refresh $url"; |
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warn "base page"; |
qq| |
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$req->out( Template::Declare->show( 'user' ) ); |
<html> |
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=for later |
<head> |
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$req->print(qq{ |
<META HTTP-EQUIV="Refresh" CONTENT="$time; URL=$url"></META> |
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<html> |
</head> |
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<head> |
<body> |
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<title>Chat!</title> |
Refresh <a href="$url"><tt>$url</tt></a> in $time sec |
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<script src="jquery.js" type="text/javascript"></script> |
</body> |
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<script src="chat-ajax-push.js" type="text/javascript"></script> |
</html> |
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</head> |
\n\r\n\r |
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<body> |
|; # XXX newlines at end are important to flush content to browser |
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<form id=f> |
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<input type=text id=username name=usernamename size=10> |
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<input type=text id=message name=message size=50> |
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<input type=submit name="sendbutton" value="Send" id="sendbutton"> |
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<span id=status></span> |
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</form> |
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<br> |
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<div id=log>-- no messages yet --</div> |
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</body> |
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</html> |
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}); |
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=cut |
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$req->next; |
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} |
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} |
} |
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my $timestamp_interval = 3; |
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my $output_tell = 0; |
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$SIG{ALRM} = sub { |
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if ( tell(STDERR) != $output_tell ) { |
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warn "\nTIMESTAMP: " . localtime() . "\n\n"; |
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$output_tell = tell(STDERR); |
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} |
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alarm $timestamp_interval; |
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}; |
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alarm $timestamp_interval; |
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1; |