/[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 101 by dpavlin, Fri Jul 11 22:54:42 2008 UTC
# Line 1  Line 1 
1  #!/usr/bin/perl  package Frey::Server;
2    
3  # "HTTP Push" is not readily attainable, so instead we will simulate it using a  use Moose;
4  # long-pull, aka "Comet". The client browser simply opens an HTTP connection to  
5  # the server and waits for a response. The server doesn't respond until there  with 'Frey::Web';
 # 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)  
6    
 use strict;  
 use lib 'lib';  
7  use Continuity;  use Continuity;
8  use Continuity::REPL;  #use Continuity::REPL;
9  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
10    
11  use View;  use Frey::ClassLoader;
   
 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  $server = Continuity->new(  #$repl = Continuity::REPL->new;
   port => 16001,  
   path_session => 1,  
   cookie_session => 'sid',  
 );  
 $server->debug_level( 2 );  
19    
20  $server->loop;  sub run {
21            $server = Continuity->new(
22                    port => 16001,
23                    path_session => 1,
24                    cookie_session => 'sid',
25                    callback => \&main,
26                    debug_level => 1,
27                    staticp => sub { $_[0]->url =~ m/\.(jpg|jpeg|gif|png|css|ico|js|html?)$/ },
28            );
29            Frey::ClassLoader->new->load_all_classes();
30            $server->loop;
31    }
32    
33  # This is the main entrypoint. We are looking for one of three things -- a  # This is the main entrypoint. We are looking for one of three things -- a
34  # pushstream, a sent message, or a request for the main HTML. We delegate each  # pushstream, a sent message, or a request for the main HTML. We delegate each
35  # of these cases, none of which will return (they all loop forever).  # of these cases, none of which will return (they all loop forever).
36  sub main {  sub main {
37    my ($req) = @_;          my ($req) = @_;
38        
39    my $path = $req->request->url->path;          my $path = $req->request->url->path;
40    print STDERR "Path: '$path'\n";          warn "REQUEST: $path\n";
41    
42          warn $req->request->header('User_Agent');          warn $req->request->header('User_Agent');
43  #warn dump( $req );  #warn dump( $req );
44    
45    # If this is a request for the pushtream, then give them that          eval {
46    if($path =~ /pushstream/) {  
47      pushstream($req);                  if ( $path =~ m!/~/([^/]+)(?:/([^/]*))?! ) {
48    }                          my $f = Frey::Introspect->new( package => $1 );
49                            $f->html( $req );
50                    }
51    
52                    if ( $path =~ m!/ob/([^/]+)(?:/([^/]*))?! ) {
53                            my $f = Frey::ObjectBrowser->new( fey_class => $1 );
54                            $f->html( $req );
55                    }
56    
57            };
58    
59            if ( $@ ) {
60                    warn $@;
61                    #$req->conn->send_error( 404 ); # FIXME this should probably be 500, but we can't ship page with it
62                    $req->print( qq{<pre class="error">$@<pre>} );
63    
64            } else {
65    
66                    my $f = Frey::ClassLoader->new;
67                    my $classes = dom2html(
68                            ul => [
69                                    map {
70                                            warn dump( $_ );
71                                            my $package = $_;
72                                            ( li => [
73                                                    a => { href => '/~/' . $package . '/' } => [ $package ],
74                                                    ' <tt>', $f->package_path( $package ), '</tt> ',
75                                                    $package->can('rows') ?
76                                                            ( a => { href => '/ob/' . $package } => [ 'browse' ] ) : '',
77                                            ] )
78                                    } $f->classes
79                            ],
80                    );
81                    $req->print( $classes );
82    
83            }
84    
85            # If this is a request for the pushtream, then give them that
86            if($path =~ /pushstream/) {
87                    pushstream($req);
88            }
89        
90    # If they are sending us a message, we give them a thread for that too          # If they are sending us a message, we give them a thread for that too
91    if($path =~ /sendmessage/) {          if($path =~ /sendmessage/) {
92      send_message($req);                  send_message($req);
93    }          }
94    
   # Otherwise, lets give them the base page  
   send_base_page($req);  
95  }  }
96    
97  # 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 102  sub send_message { Line 131  sub send_message {
131    }    }
132  }  }
133    
134  # This isn't a pushstream, nor a new message. It is just the main page. We loop  1;
 # in case they ask for it multiple times :)  
 sub send_base_page {  
   my ($req) = @_;  
   while(1) {  
         warn "base page";  
         $req->print( Template::Declare->show( 'user' ) );  
 =for later  
     $req->print(qq{  
       <html>  
         <head>  
           <title>Chat!</title>  
           <script src="jquery.js" type="text/javascript"></script>  
           <script src="chat-ajax-push.js" type="text/javascript"></script>  
         </head>  
         <body>  
           <form id=f>  
           <input type=text id=username name=usernamename size=10>  
           <input type=text id=message name=message size=50>  
           <input type=submit name="sendbutton" value="Send" id="sendbutton">  
           <span id=status></span>  
           </form>  
           <br>  
           <div id=log>-- no messages yet --</div>  
         </body>  
       </html>  
     });  
 =cut  
     $req->next;  
   }  
 }  
   
   
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