/[Frey]/trunk/lib/Frey/Server.pm
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trunk/server.pl revision 2 by dpavlin, Sat Jun 28 11:49:35 2008 UTC trunk/lib/Frey/Server.pm revision 48 by dpavlin, Wed Jul 2 12:36:59 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 );
 $repl = Continuity::REPL->new;  
17    
18    #$repl = Continuity::REPL->new;
19  $server = Continuity->new(  $server = Continuity->new(
20    port => 16001,          port => 16001,
21    path_session => 1,          path_session => 1,
22    cookie_session => 'sid',          cookie_session => 'sid',
23            callback => \&main,
24            debug_level => 1,
25            staticp => sub { $_[0]->url =~ m/\.(jpg|jpeg|gif|png|css|ico|js|html?)$/ },
26  );  );
 $server->debug_level( 2 );  
27    
28  $server->loop;  sub run {
29            $server->loop;
30    }
31    
32  # This is the main entrypoint. We are looking for one of three things -- a  # This is the main entrypoint. We are looking for one of three things -- a
33  # pushstream, a sent message, or a request for the main HTML. We delegate each  # pushstream, a sent message, or a request for the main HTML. We delegate each
34  # of these cases, none of which will return (they all loop forever).  # of these cases, none of which will return (they all loop forever).
35  sub main {  sub main {
36    my ($req) = @_;          my ($req) = @_;
37        
38    my $path = $req->request->url->path;          my $path = $req->request->url->path;
39    print STDERR "Path: '$path'\n";          warn "REQUEST: $path\n";
40    
41          warn $req->request->header('User_Agent');          warn $req->request->header('User_Agent');
42  #warn dump( $req );  #warn dump( $req );
43    
44    # If this is a request for the pushtream, then give them that          # If this is a request for the pushtream, then give them that
45    if($path =~ /pushstream/) {          if($path =~ /pushstream/) {
46      pushstream($req);                  pushstream($req);
47    }          }
48        
49    # If they are sending us a message, we give them a thread for that too          # If they are sending us a message, we give them a thread for that too
50    if($path =~ /sendmessage/) {          if($path =~ /sendmessage/) {
51      send_message($req);                  send_message($req);
52    }          }
53    
54    # Otherwise, lets give them the base page          # Otherwise, lets give them page
55    send_base_page($req);          send_page($req);
56  }  }
57    
58  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 104  sub send_message { Line 94  sub send_message {
94    
95  # This isn't a pushstream, nor a new message. It is just the main page. We loop  # This isn't a pushstream, nor a new message. It is just the main page. We loop
96  # in case they ask for it multiple times :)  # in case they ask for it multiple times :)
97  sub send_base_page {  sub send_page {
98    my ($req) = @_;          my ($req) = @_;
99    while(1) {          my $templates = Template::Declare->templates;
100          warn "base page";          while(1) {
101          $req->out( Template::Declare->show( 'user' ) );                  warn "param = ",dump($req->param);
102  =for later                  my $path = $req->request->url->path;
103      $req->print(qq{  
104        <html>                  my $html;
105          <head>  
106            <title>Chat!</title>                  if ( $path =~ m/::/ ) {
107            <script src="jquery.js" type="text/javascript"></script>                          my ( undef, $module, $method ) = split(m!/!, $path, 3);
108            <script src="chat-ajax-push.js" type="text/javascript"></script>  
109          </head>                          if ( ! defined( $templates->{$module} ) ) {
110          <body>                                  $req->conn->send_status_line( 404, "$module" );
111            <form id=f>                                  $html = "Package $module not found";
112            <input type=text id=username name=usernamename size=10>                          } elsif ( ! $method ) {
113            <input type=text id=message name=message size=50>                                  $html = Frey::HTML->page( 'package-methods', $req, $module );
114            <input type=submit name="sendbutton" value="Send" id="sendbutton">                          } elsif ( grep(/^\Q$method\E$/, @{ $templates->{$module} }) ) {
115            <span id=status></span>                                  $html = Frey::HTML->page( $method, $req );
116            </form>                          } else {
117            <br>                                  $req->conn->send_status_line( 404, "$module $method" );
118            <div id=log>-- no messages yet --</div>                                  $html = "Package $module doesn't have $method";
119          </body>                          }
120        </html>                  } else {
121      });                          warn "fallback to status page\n";
122  =cut                          $html = Frey::HTML->page( 'status' );
123      $req->next;                  }
124    }  
125                    $req->print( $html );
126                    warn ">> ",length( $html ), " bytes\n";
127                    $req->next;
128            }
129  }  }
130    
131    1;
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