/[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 429 by dpavlin, Tue Nov 18 23:57:56 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  extends 'Frey';
5  # the server and waits for a response. The server doesn't respond until there  with 'Frey::Web';
6  # is some event (here a new message), giving the appearance of HTTP-push.  with 'Frey::Config';
 #  
 # 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)  
7    
 use strict;  
 use lib 'lib';  
8  use Continuity;  use Continuity;
9  use Continuity::REPL;  #use Continuity::REPL;
10  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
11    
12  use View;  #use Carp::REPL; ## XXX it would be nice, but it breaks error reporting too much
13    use Frey::ClassLoader;
14  use Template::Declare;  use Frey::Run;
15  use Template::Declare::Tags; # defaults to 'HTML'  use Frey::Editor;
 Template::Declare->init( roots => ['View']);  
 warn "templates = ",dump( Template::Declare->templates );  
16    
17  my @messages;    # Global (shared) list of messages  my @messages;    # Global (shared) list of messages
18  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
19    
20  use vars qw( $repl $server @messages );  use vars qw( $repl $server );
21  $repl = Continuity::REPL->new;  
22    #$repl = Continuity::REPL->new;
23    
24    =head1 NAME
25    
26    Frey::Server - Continuity based server for Frey
27    
28    =head2 DESCRIPTION
29    
30    This is one of pissible server implementations for Frey. In it's current stage, it's also most complete one.
31    
32    =head2 run
33    
34      $o->run( $optional_port );
35    
36    =cut
37    
38    sub run {
39            my ( $self, $port ) = @_;
40            $server = Continuity->new(
41                    port => $port || $self->config->{port} || 16001,
42                    path_session => 1,
43                    cookie_session => 'sid',
44                    callback => \&main,
45                    debug_level => 2,
46                    staticp => sub { $_[0]->url =~ m/^(static|var).*\.(jpg|jpeg|gif|png|css|ico|js|html?|xml|json|ya?ml)(\?.*)?$/ },
47            );
48            $Module::Reload::Debug = 1; # auto if debug_level > 1
49            Frey::ClassLoader->new->load_all_classes();
50            $server->loop;
51    }
52    
53    =head2 main
54    
55    This is simple dispatcher for our server. Currently it's in flux and
56    documented only in source code.
57    
58    =cut
59    
 $server = Continuity->new(  
   port => 16001,  
   path_session => 1,  
   cookie_session => 'sid',  
 );  
 $server->debug_level( 2 );  
   
 $server->loop;  
   
 # This is the main entrypoint. We are looking for one of three things -- a  
 # pushstream, a sent message, or a request for the main HTML. We delegate each  
 # of these cases, none of which will return (they all loop forever).  
60  sub main {  sub main {
61    my ($req) = @_;          my ($req) = @_;
62      
63    my $path = $req->request->url->path;          my $path = $req->request->url->path;
64    print STDERR "Path: '$path'\n";  
65            eval {
66          warn $req->request->header('User_Agent');  
67  #warn dump( $req );                  #warn "REQUEST: $path ",dump( $req->params );
68    
69    # If this is a request for the pushtream, then give them that                  if ( $path =~ m!reload! || $req->param('reload') ) {
70    if($path =~ /pushstream/) {                          warn "# reload!";
71      pushstream($req);                          Module::Reload->check;
72    }                          Frey::Server->new->load_config;
73                      }
74    # If they are sending us a message, we give them a thread for that too  
75    if($path =~ /sendmessage/) {  #               warn $req->request->header('User_Agent');
76      send_message($req);  
77    }                  my %params = $req->params;
78                    my $html;
79    
80                    sub rest2class {
81                            my $class = shift;
82                            $class =~ s/-/::/; # sigh!
83                            return $class;
84                    }
85    
86    
87                    my $f;
88    
89                    my $run_regexp = join('|', Frey::Run->runnable );
90                    my $editor = Frey::Editor->new;
91    
92                    # shared run params
93                    my $run = {
94                            request_url => $req->request->url,
95                    };
96    
97                    if (
98                            $path =~ m{/Frey[:-]+ObjectBrowser}
99                    ) {
100                            $f = Frey::ObjectBrowser->new( fey_class => $params{class} );
101                            $f->request( $req );
102                    } elsif (
103                            $path =~ m{/Frey[:-]+ObjectDesigner}
104                    ) {
105                            $f = Frey::ObjectDesigner->new( fey_class => $params{class} );
106                            $f->request( $req );
107                    } elsif ( $path =~ $editor->url_regex ) {
108                            $req->print( $editor->command( $path ) );
109                            system( $editor->command( $path ) );
110                            return;
111                    } elsif (
112                            $path =~ m{/([^/]+)/($run_regexp)/?([^/]+)?}
113                    ) {
114                            my $class = rest2class $1;
115                            warn "# run $path -> $class $2";
116                            $run->{format} = $3 if $3;
117                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, %$run );
118                    } elsif (
119                            $path =~ m{/([^/]+)/?$}
120                    ) {
121                            my $class = rest2class $1;
122                            warn "# introspect $class";
123                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, %$run );
124                    } else {
125                            $f = Frey::Run->new( class => 'Frey::ClassBrowser', %$run );
126                    }
127    
128                    if ( $f ) {
129                            $req->print( $f->html );
130                    } else {
131                            warn "# can't call request on nothing!";
132                    }
133    
134            };
135    
136            if ( $@ ) {
137                    warn $@;
138                    $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
139                    $req->print( qq{<pre class="frey-error">$@<pre>} );
140    #               Carp::REPL::repl;
141            }
142    
143            # If this is a request for the pushtream, then give them that
144            if($path =~ /pushstream/) {
145                    pushstream($req);
146            }
147    
148            # If they are sending us a message, we give them a thread for that too
149            if($path =~ /sendmessage/) {
150                    send_message($req);
151            }
152    
   # Otherwise, lets give them the base page  
   send_base_page($req);  
153  }  }
154    
155  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 102  sub send_message { Line 189  sub send_message {
189    }    }
190  }  }
191    
192  # This isn't a pushstream, nor a new message. It is just the main page. We loop  1;
 # in case they ask for it multiple times :)  
 sub send_base_page {  
   my ($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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