/[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 392 by dpavlin, Tue Nov 18 00:55:23 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;
 use Template::Declare::Tags; # defaults to 'HTML'  
 Template::Declare->init( roots => ['View']);  
 warn "templates = ",dump( Template::Declare->templates );  
15    
16  my @messages;    # Global (shared) list of messages  my @messages;    # Global (shared) list of messages
17  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
18    
19  use vars qw( $repl $server @messages );  use vars qw( $repl $server );
20  $repl = Continuity::REPL->new;  
21    #$repl = Continuity::REPL->new;
22    
23    =head1 NAME
24    
25    Frey::Server - Continuity based server for Frey
26    
27    =head2 DESCRIPTION
28    
29    This is one of pissible server implementations for Frey. In it's current stage, it's also most complete one.
30    
31    =head2 run
32    
33      $o->run( $optional_port );
34    
35    =cut
36    
37    sub run {
38            my ( $self, $port ) = @_;
39            $server = Continuity->new(
40                    port => $port || $self->config->{port} || 16001,
41                    path_session => 1,
42                    cookie_session => 'sid',
43                    callback => \&main,
44                    debug_level => 2,
45                    staticp => sub { $_[0]->url =~ m/\.(jpg|jpeg|gif|png|css|ico|js|html?|xml|json|ya?ml)(\?.*)?$/ },
46            );
47            $Module::Reload::Debug = 1; # auto if debug_level > 1
48            Frey::ClassLoader->new->load_all_classes();
49            $server->loop;
50    }
51    
52    =head2 main
53    
54    This is simple dispatcher for our server. Currently it's in flux and
55    documented only in source code.
56    
57    =cut
58    
 $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).  
59  sub main {  sub main {
60    my ($req) = @_;          my ($req) = @_;
61      
62    my $path = $req->request->url->path;          my $path = $req->request->url->path;
63    print STDERR "Path: '$path'\n";          #warn "REQUEST: $path ",dump( $req->params );
64    
65          warn $req->request->header('User_Agent');          Module::Reload->check if $path =~ m!reload! || $req->param('reload');
66  #warn dump( $req );  
67    #       warn $req->request->header('User_Agent');
68    # If this is a request for the pushtream, then give them that  
69    if($path =~ /pushstream/) {          my %params = $req->params;
70      pushstream($req);          my $html;
71    }  
72              sub rest2class {
73    # If they are sending us a message, we give them a thread for that too                  my $class = shift;
74    if($path =~ /sendmessage/) {                  $class =~ s/-/::/; # sigh!
75      send_message($req);                  return $class;
76    }          }
77    
78    
79            eval {
80    
81                    my $f;
82    
83                    my $run_regexp = join('|', Frey::Run->runnable );
84    
85                    if (
86                            $path =~ m{/Frey[:-]+ObjectBrowser}
87                    ) {
88                            $f = Frey::ObjectBrowser->new( fey_class => $params{class} );
89                            $f->request( $req );
90                    } elsif (
91                            $path =~ m{/Frey[:-]+ObjectDesigner}
92                    ) {
93                            $f = Frey::ObjectDesigner->new( fey_class => $params{class} );
94                            $f->request( $req );
95                    } elsif (
96                            $path =~ m{/editor(.+?)\+(\d+)}
97                    ) {
98                            my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
99                            # FIXME SECURITY path verification for $1
100                            my $cmd = "$editor +$2 $1";
101                            warn "# $path -> system $cmd";
102                            $req->print( $cmd );
103                            system( $cmd );
104                            return;
105                    } elsif (
106                            $path =~ m{/([^/]+)/($run_regexp)}
107                    ) {
108                            my $class = rest2class $1;
109                            warn "# run $class $2\n";
110                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, request_url => $req->request->url );
111                    } elsif (
112                            $path =~ m{/([^/]+)/?$}
113                    ) {
114                            my $class = rest2class $1;
115                            warn "# introspect $class";
116                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, request_url => $req->request->url );
117                    } else {
118                            $f = Frey::Run->new( class => 'Frey::ClassBrowser' );
119                    }
120    
121                    if ( $f ) {
122                            $req->print( $f->html );
123                    } else {
124                            warn "# can't call request on nothing!";
125                    }
126    
127            };
128    
129            my $self = $req;
130    
131            if ( $@ ) {
132                    warn $@;
133                    $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
134                    $req->print( qq{<pre class="frey-error">$@<pre>} );
135    #               Carp::REPL::repl;
136    
137            }
138    
139            # If this is a request for the pushtream, then give them that
140            if($path =~ /pushstream/) {
141                    pushstream($req);
142            }
143    
144            # If they are sending us a message, we give them a thread for that too
145            if($path =~ /sendmessage/) {
146                    send_message($req);
147            }
148    
   # Otherwise, lets give them the base page  
   send_base_page($req);  
149  }  }
150    
151  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 102  sub send_message { Line 185  sub send_message {
185    }    }
186  }  }
187    
188  # This isn't a pushstream, nor a new message. It is just the main page. We loop  1;
 # in case they ask for it multiple times :)  
 sub send_base_page {  
   my ($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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