/[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 23 by dpavlin, Sun Jun 29 16:24:41 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    
12  use Template::Declare;  use Frey::HTML;
 use Template::Declare::Tags; # defaults to 'HTML'  
 Template::Declare->init( roots => ['View']);  
 warn "templates = ",dump( Template::Declare->templates );  
13    
14  my @messages;    # Global (shared) list of messages  my @messages;    # Global (shared) list of messages
15  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
16    
17  use vars qw( $repl $server @messages );  use vars qw( $repl $server );
18  $repl = Continuity::REPL->new;  $repl = Continuity::REPL->new;
19    
20  $server = Continuity->new(  $server = Continuity->new(
21    port => 16001,    port => 16001,
22    path_session => 1,    path_session => 1,
23    cookie_session => 'sid',    cookie_session => 'sid',
24      callback => \&main,
25  );  );
26  $server->debug_level( 2 );  $server->debug_level( 2 );
27    
# Line 46  sub main { Line 34  sub main {
34    my ($req) = @_;    my ($req) = @_;
35        
36    my $path = $req->request->url->path;    my $path = $req->request->url->path;
37    print STDERR "Path: '$path'\n";    warn "REQUEST: $path\n";
38    
39          warn $req->request->header('User_Agent');          warn $req->request->header('User_Agent');
40  #warn dump( $req );  #warn dump( $req );
41    
42    # If this is a request for the pushtream, then give them that    # If this is a request for the pushtream, then give them that
43    if($path =~ /pushstream/) {    if($path =~ /pushstream/) {
44      pushstream($req);          pushstream($req);
45    }    }
46        
47    # If they are sending us a message, we give them a thread for that too    # If they are sending us a message, we give them a thread for that too
48    if($path =~ /sendmessage/) {    if($path =~ /sendmessage/) {
49      send_message($req);          send_message($req);
50    }    }
51    
52    # Otherwise, lets give them the base page    # Otherwise, lets give them page
53    send_base_page($req);    send_page($req);
54  }  }
55    
56  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 104  sub send_message { Line 92  sub send_message {
92    
93  # This isn't a pushstream, nor a new message. It is just the main page. We loop  # This isn't a pushstream, nor a new message. It is just the main page. We loop
94  # in case they ask for it multiple times :)  # in case they ask for it multiple times :)
95  sub send_base_page {  sub send_page {
96    my ($req) = @_;          my ($req) = @_;
97    while(1) {          my $templates = Template::Declare->templates;
98          warn "base page";          while(1) {
99          $req->out( Template::Declare->show( 'user' ) );                  warn "param = ",dump($req->param);
100  =for later                  my $path = $req->request->url->path;
101      $req->print(qq{  
102        <html>                  if ( $path =~ m/::/ ) {
103          <head>                          my ( undef, $module, $method ) = split(m!/!, $path, 3);
104            <title>Chat!</title>  
105            <script src="jquery.js" type="text/javascript"></script>                          if ( ! defined( $templates->{$module} ) ) {
106            <script src="chat-ajax-push.js" type="text/javascript"></script>                                  $req->conn->send_status_line( 404, "$module" );
107          </head>                                  $req->print("Package $module not found");
108          <body>                          } elsif ( grep(/^\Q$method\E$/, @{ $templates->{$module} }) ) {
109            <form id=f>                                  $req->print( Frey::HTML->page( $method, $req ) );
110            <input type=text id=username name=usernamename size=10>                          } else {
111            <input type=text id=message name=message size=50>                                  $req->conn->send_status_line( 404, "$module $method" );
112            <input type=submit name="sendbutton" value="Send" id="sendbutton">                                  $req->print("Package $module doesn't have $method");
113            <span id=status></span>                          }
114            </form>                  } else {
115            <br>                          my $html = Frey::HTML->page( 'status' );
116            <div id=log>-- no messages yet --</div>                          $req->print( $html );
117          </body>                          warn ">> ",length( $html ), " bytes\n";
118        </html>                  }
119      });                  $req->next;
120  =cut                  Module::Refresh->refresh;
121      $req->next;          }
   }  
122  }  }
123    
   
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