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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 |
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# long-pull, aka "Comet". The client browser simply opens an HTTP connection to |
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# the server and waits for a response. The server doesn't respond until there |
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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; |
use strict; |
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use lib 'lib'; |
use warnings; |
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use Continuity; |
use Continuity; |
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use Continuity::REPL; |
#use Continuity::REPL; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use View; |
use base 'Frey'; |
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use Frey::HTML; |
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use Template::Declare; |
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use Template::Declare::Tags; # defaults to 'HTML' |
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Template::Declare->init( roots => ['View']); |
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warn "templates = ",dump( Template::Declare->templates ); |
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my @messages; # Global (shared) list of messages |
my @messages; # Global (shared) list of messages |
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my $got_message; # Flag to indicate that there is a new message to display |
my $got_message; # Flag to indicate that there is a new message to display |
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use vars qw( $repl $server @messages ); |
use vars qw( $repl $server ); |
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$repl = Continuity::REPL->new; |
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#$repl = Continuity::REPL->new; |
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$server = Continuity->new( |
$server = Continuity->new( |
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port => 16001, |
port => 16001, |
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path_session => 1, |
path_session => 1, |
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cookie_session => 'sid', |
cookie_session => 'sid', |
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callback => \&main, |
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debug_level => 1, |
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); |
); |
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$server->debug_level( 2 ); |
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$server->loop; |
sub run { |
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$server->loop; |
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} |
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# This is the main entrypoint. We are looking for one of three things -- a |
# This is the main entrypoint. We are looking for one of three things -- a |
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# pushstream, a sent message, or a request for the main HTML. We delegate each |
# pushstream, a sent message, or a request for the main HTML. We delegate each |
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# of these cases, none of which will return (they all loop forever). |
# of these cases, none of which will return (they all loop forever). |
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sub main { |
sub main { |
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my ($req) = @_; |
my ($req) = @_; |
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my $path = $req->request->url->path; |
my $path = $req->request->url->path; |
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print STDERR "Path: '$path'\n"; |
warn "REQUEST: $path\n"; |
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warn $req->request->header('User_Agent'); |
warn $req->request->header('User_Agent'); |
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#warn dump( $req ); |
#warn dump( $req ); |
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# If this is a request for the pushtream, then give them that |
# If this is a request for the pushtream, then give them that |
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if($path =~ /pushstream/) { |
if($path =~ /pushstream/) { |
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pushstream($req); |
pushstream($req); |
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} |
} |
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# If they are sending us a message, we give them a thread for that too |
# If they are sending us a message, we give them a thread for that too |
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if($path =~ /sendmessage/) { |
if($path =~ /sendmessage/) { |
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send_message($req); |
send_message($req); |
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} |
} |
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# Otherwise, lets give them the base page |
# Otherwise, lets give them page |
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send_base_page($req); |
send_page($req); |
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} |
} |
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# Here we accept a connection to the browser, and keep it open. Meanwhile we |
# Here we accept a connection to the browser, and keep it open. Meanwhile we |
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# This isn't a pushstream, nor a new message. It is just the main page. We loop |
# This isn't a pushstream, nor a new message. It is just the main page. We loop |
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# in case they ask for it multiple times :) |
# in case they ask for it multiple times :) |
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sub send_base_page { |
sub send_page { |
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my ($req) = @_; |
my ($req) = @_; |
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while(1) { |
my $templates = Template::Declare->templates; |
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warn "base page"; |
while(1) { |
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$req->print( Template::Declare->show( 'user' ) ); |
warn "param = ",dump($req->param); |
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=for later |
my $path = $req->request->url->path; |
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$req->print(qq{ |
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<html> |
my $html; |
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<head> |
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<title>Chat!</title> |
if ( $path =~ m/::/ ) { |
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<script src="jquery.js" type="text/javascript"></script> |
my ( undef, $module, $method ) = split(m!/!, $path, 3); |
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<script src="chat-ajax-push.js" type="text/javascript"></script> |
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</head> |
if ( ! defined( $templates->{$module} ) ) { |
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<body> |
$req->conn->send_status_line( 404, "$module" ); |
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<form id=f> |
$html = "Package $module not found"; |
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<input type=text id=username name=usernamename size=10> |
} elsif ( ! $method ) { |
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<input type=text id=message name=message size=50> |
$html = Frey::HTML->page( 'package-methods', $req, $module ); |
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<input type=submit name="sendbutton" value="Send" id="sendbutton"> |
} elsif ( grep(/^\Q$method\E$/, @{ $templates->{$module} }) ) { |
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<span id=status></span> |
$html = Frey::HTML->page( $method, $req ); |
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</form> |
} else { |
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<br> |
$req->conn->send_status_line( 404, "$module $method" ); |
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<div id=log>-- no messages yet --</div> |
$html = "Package $module doesn't have $method"; |
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</body> |
} |
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</html> |
} else { |
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}); |
warn "fallback to status page\n"; |
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=cut |
$html = Frey::HTML->page( 'status' ); |
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$req->next; |
} |
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} |
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$req->print( $html ); |
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warn ">> ",length( $html ), " bytes\n"; |
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$req->next; |
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} |
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} |
} |
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1; |