/[Frey]/trunk/lib/Frey/Server.pm
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trunk/server.pl revision 9 by dpavlin, Sat Jun 28 18:49:47 2008 UTC trunk/lib/Frey/Server.pm revision 25 by dpavlin, Sun Jun 29 17:27:45 2008 UTC
# Line 1  Line 1 
1  #!/usr/bin/perl  package Frey::Server;
   
 # "HTTP Push" is not readily attainable, so instead we will simulate it using a  
 # long-pull, aka "Comet". The client browser simply opens an HTTP connection to  
 # the server and waits for a response. The server doesn't respond until there  
 # is some event (here a new message), giving the appearance of HTTP-push.  
 #  
 # Each user gets three continuations for these three cases:  
 #  
 #   - Initial load or reload of the page  
 #   - Sending a message (uses AJAX on the client)  
 #   - Recieving messages (uses COMET on the client)  
2    
3  use strict;  use strict;
4  use lib 'lib';  use warnings;
5    
6  use Continuity;  use Continuity;
7  use Continuity::REPL;  use Continuity::REPL;
8  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
9    
10  use View;  use base 'Frey';
11    use Frey::HTML;
 use Template::Declare;  
 use Template::Declare::Tags; # defaults to 'HTML'  
 Template::Declare->init( roots => ['View']);  
 warn "templates = ",dump( Template::Declare->templates );  
12    
13  my @messages;    # Global (shared) list of messages  my @messages;    # Global (shared) list of messages
14  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
15    
16  use vars qw( $repl $server @messages );  use vars qw( $repl $server );
 $repl = Continuity::REPL->new;  
17    
18  $server = Continuity->new(  sub run {
19    port => 16001,          $repl = Continuity::REPL->new;
20    path_session => 1,          $server = Continuity->new(
21    cookie_session => 'sid',            port => 16001,
22  );            path_session => 1,
23  $server->debug_level( 2 );            cookie_session => 'sid',
24              callback => \&main,
25            );
26            $server->debug_level( 2 );
27    
28  $server->loop;          $server->loop;
29    }
30    
31  # This is the main entrypoint. We are looking for one of three things -- a  # This is the main entrypoint. We are looking for one of three things -- a
32  # pushstream, a sent message, or a request for the main HTML. We delegate each  # pushstream, a sent message, or a request for the main HTML. We delegate each
# Line 46  sub main { Line 35  sub main {
35    my ($req) = @_;    my ($req) = @_;
36        
37    my $path = $req->request->url->path;    my $path = $req->request->url->path;
38    print STDERR "Path: '$path'\n";    warn "REQUEST: $path\n";
39    
40          warn $req->request->header('User_Agent');          warn $req->request->header('User_Agent');
41  #warn dump( $req );  #warn dump( $req );
42    
43    # If this is a request for the pushtream, then give them that    # If this is a request for the pushtream, then give them that
44    if($path =~ /pushstream/) {    if($path =~ /pushstream/) {
45      pushstream($req);          pushstream($req);
46    }    }
47        
48    # If they are sending us a message, we give them a thread for that too    # If they are sending us a message, we give them a thread for that too
49    if($path =~ /sendmessage/) {    if($path =~ /sendmessage/) {
50      send_message($req);          send_message($req);
51    }    }
52    
53    # Otherwise, lets give them the base page    # Otherwise, lets give them page
54    send_base_page($req);    send_page($req);
55  }  }
56    
57  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 104  sub send_message { Line 93  sub send_message {
93    
94  # This isn't a pushstream, nor a new message. It is just the main page. We loop  # This isn't a pushstream, nor a new message. It is just the main page. We loop
95  # in case they ask for it multiple times :)  # in case they ask for it multiple times :)
96  sub send_base_page {  sub send_page {
97    my ($req) = @_;          my ($req) = @_;
98    while(1) {          my $templates = Template::Declare->templates;
99          warn "base page";          while(1) {
100          $req->print( Template::Declare->show( 'user' ) );                  warn "param = ",dump($req->param);
101  =for later                  my $path = $req->request->url->path;
102      $req->print(qq{  
103        <html>                  if ( $path =~ m/::/ ) {
104          <head>                          my ( undef, $module, $method ) = split(m!/!, $path, 3);
105            <title>Chat!</title>  
106            <script src="jquery.js" type="text/javascript"></script>                          if ( ! defined( $templates->{$module} ) ) {
107            <script src="chat-ajax-push.js" type="text/javascript"></script>                                  $req->conn->send_status_line( 404, "$module" );
108          </head>                                  $req->print("Package $module not found");
109          <body>                          } elsif ( grep(/^\Q$method\E$/, @{ $templates->{$module} }) ) {
110            <form id=f>                                  $req->print( Frey::HTML->page( $method, $req ) );
111            <input type=text id=username name=usernamename size=10>                          } else {
112            <input type=text id=message name=message size=50>                                  $req->conn->send_status_line( 404, "$module $method" );
113            <input type=submit name="sendbutton" value="Send" id="sendbutton">                                  $req->print("Package $module doesn't have $method");
114            <span id=status></span>                          }
115            </form>                  } else {
116            <br>                          my $html = Frey::HTML->page( 'status' );
117            <div id=log>-- no messages yet --</div>                          $req->print( $html );
118          </body>                          warn ">> ",length( $html ), " bytes\n";
119        </html>                  }
120      });                  $req->next;
121  =cut                  Module::Refresh->refresh;
122      $req->next;          }
   }  
123  }  }
124    
125    1;
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