/[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 518 by dpavlin, Tue Nov 25 14:58:59 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 );                  sub refresh {
68                            my $url = shift || '/';
69    # If this is a request for the pushtream, then give them that                          warn "# refresh $url";
70    if($path =~ /pushstream/) {                          qq|
71      pushstream($req);                                  <html>
72    }                                  <head>
73                                              <META HTTP-EQUIV="Refresh" CONTENT="1; URL=$url"></META>
74    # If they are sending us a message, we give them a thread for that too                                  </head>
75    if($path =~ /sendmessage/) {                                  <body>
76      send_message($req);                                          Refresh <a href="$url"><tt>$url</tt></a>
77    }                                  </body>
78                                    </html>
79                                    \n\r\n\r
80                            |; # XXX newlines at end are important to flush content to browser
81                    }
82    
83                    if ( $path =~ m{/reload(.*)} ) {
84                            Frey::Server->new->load_config;
85                            Module::Reload->check;
86                            warn "# reload done";
87                            $req->print( refresh( $1 ) );
88                            return;
89                    } elsif ( $path =~ m{/exit(.*)} ) {
90                            # FIXME do we need some kind of check here for production? :-)
91                            # ./bin/dev.sh will restart us during development
92                            $req->print( refresh( $1 ) );
93                            exit;
94                    }
95    
96    #               warn $req->request->header('User_Agent');
97    
98                    my %params = $req->params;
99                    my $html;
100    
101                    sub rest2class {
102                            my $class = shift;
103                            $class =~ s/-/::/; # sigh!
104                            return $class;
105                    }
106    
107    
108                    my $f;
109    
110                    my $editor = Frey::Editor->new;
111    
112                    # shared run params
113                    my $run = {
114                            request_url => $req->request->url,
115                            debug => 1,
116                    };
117    
118                    if (
119                            $path =~ m{/Frey[:-]+ObjectBrowser}
120                    ) {
121                            $f = Frey::ObjectBrowser->new( fey_class => $params{class} );
122                            $f->request( $req );
123                    } elsif (
124                            $path =~ m{/Frey[:-]+ObjectDesigner}
125                    ) {
126                            $f = Frey::ObjectDesigner->new( fey_class => $params{class} );
127                            $f->request( $req );
128                    } elsif ( $path =~ $editor->url_regex ) {
129                            $req->print( $editor->command( $path ) );
130                            system( $editor->command( $path ) );
131                            return;
132                    } elsif (
133                            $path =~ m{/([^/]+)/(as_\w+)/?([^/]+)?}
134                    ) {
135                            my $class = rest2class $1;
136                            warn "# run $path -> $class $2";
137                            $run->{format} = $3 if $3;
138                            $params{request_url} = $req->request->url;
139                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, %$run );
140                    } elsif (
141                            $path =~ m{/([^/]+)/?$}
142                    ) {
143                            my $class = rest2class $1;
144                            warn "# introspect $class";
145                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, %$run );
146                    } else {
147                            $f = Frey::Run->new( class => 'Frey::ClassBrowser', %$run );
148                    }
149    
150                    if ( $f ) {
151                            $f->add_status( { req => $req } );
152                            warn "## status ", dump( map { keys %$_ } @{ $f->status } );
153                            $req->print( $f->html );
154                    } else {
155                            warn "# can't call request on nothing!";
156                    }
157    
158            };
159    
160            if ( $@ ) {
161                    warn $@;
162                    $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
163                    $req->print( qq{<pre class="frey-error">$@<pre>} );
164    #               Carp::REPL::repl;
165            }
166    
167            # If this is a request for the pushtream, then give them that
168            if($path =~ /pushstream/) {
169                    pushstream($req);
170            }
171    
172            # If they are sending us a message, we give them a thread for that too
173            if($path =~ /sendmessage/) {
174                    send_message($req);
175            }
176    
   # Otherwise, lets give them the base page  
   send_base_page($req);  
177  }  }
178    
179  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 102  sub send_message { Line 213  sub send_message {
213    }    }
214  }  }
215    
216  # This isn't a pushstream, nor a new message. It is just the main page. We loop  1;
 # in case they ask for it multiple times :)  
 sub send_base_page {  
   my ($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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