/[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 533 by dpavlin, Wed Nov 26 07:58:05 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 {
47                            $_[0]->url =~ m{^/+(static|var).*\.(jpg|jpeg|gif|png|css|ico|js|html?|xml|json|ya?ml)(\?.*)?$}
48                    },
49            );
50            $Module::Reload::Debug = 1; # auto if debug_level > 1
51            Frey::ClassLoader->new->load_all_classes();
52            $server->loop;
53    }
54    
55    =head2 main
56    
57    This is simple dispatcher for our server. Currently it's in flux and
58    documented only in source code.
59    
60    =cut
61    
 $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).  
62  sub main {  sub main {
63    my ($req) = @_;          my ($req) = @_;
     
   my $path = $req->request->url->path;  
   print STDERR "Path: '$path'\n";  
   
         warn $req->request->header('User_Agent');  
 #warn dump( $req );  
   
   # If this is a request for the pushtream, then give them that  
   if($path =~ /pushstream/) {  
     pushstream($req);  
   }  
     
   # If they are sending us a message, we give them a thread for that too  
   if($path =~ /sendmessage/) {  
     send_message($req);  
   }  
64    
65    # Otherwise, lets give them the base page          my $path = $req->request->url->path;
66    send_base_page($req);  
67            eval {
68    
69                    sub refresh {
70                            my ( $url, $time ) = @_;
71                            $url  ||= '/';
72                            $time ||= 1;
73                            warn "# refresh $url";
74                            qq|
75                                    <html>
76                                    <head>
77                                            <META HTTP-EQUIV="Refresh" CONTENT="$time; URL=$url"></META>
78                                    </head>
79                                    <body>
80                                            Refresh <a href="$url"><tt>$url</tt></a> in $time sec
81                                    </body>
82                                    </html>
83                                    \n\r\n\r
84                            |; # XXX newlines at end are important to flush content to browser
85                    }
86    
87                    if ( $path =~ m{/reload(.*)} ) {
88                            Frey::Server->new->load_config;
89                            Module::Reload->check;
90                            warn "# reload done";
91                            $req->print( refresh( $1, 1 ) );
92                            return;
93                    } elsif ( $path =~ m{/exit(.*)} ) {
94                            # FIXME do we need some kind of check here for production? :-)
95                            # ./bin/dev.sh will restart us during development
96                            $req->print( refresh( $1, 2 ) );
97                            exit;
98                    }
99    
100    #               warn $req->request->header('User_Agent');
101    
102                    my %params = $req->params;
103                    my $html;
104    
105                    sub rest2class {
106                            my $class = shift;
107                            $class =~ s/-/::/; # sigh!
108                            return $class;
109                    }
110    
111    
112                    my $f;
113    
114                    my $editor = Frey::Editor->new;
115    
116                    # shared run params
117                    my $run = {
118                            request_url => $req->request->url,
119                            debug => 1,
120                    };
121    
122                    if (
123                            $path =~ m{/Frey[:-]+ObjectBrowser}
124                    ) {
125                            $f = Frey::ObjectBrowser->new( fey_class => $params{class} );
126                            $f->request( $req );
127                    } elsif (
128                            $path =~ m{/Frey[:-]+ObjectDesigner}
129                    ) {
130                            $f = Frey::ObjectDesigner->new( fey_class => $params{class} );
131                            $f->request( $req );
132                    } elsif ( $path =~ $editor->url_regex ) {
133                            $req->print( $editor->command( $path ) );
134                            system( $editor->command( $path ) );
135                            return;
136                    } elsif (
137                            $path =~ m{/([^/]+)/(as_\w+)/?([^/]+)?}
138                    ) {
139                            my $class = rest2class $1;
140                            warn "# run $path -> $class $2";
141                            $run->{format} = $3 if $3;
142                            $params{request_url} = $req->request->url;
143                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, %$run );
144                    } elsif (
145                            $path =~ m{/([^/]+)/?$}
146                    ) {
147                            my $class = rest2class $1;
148                            warn "# introspect $class";
149                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, %$run );
150                    } else {
151                            $f = Frey::Run->new( class => 'Frey::ClassBrowser', %$run );
152                    }
153    
154                    if ( $f ) {
155                            $f->clean_status;
156                            $f->add_status( { request => $req } );
157                            warn "## status ", dump( map { keys %$_ } $f->status );
158                            my $html = $f->html;
159                            die "no html output" unless $html;
160                            warn "## html ",length($html)," bytes";
161                            $req->print( "$html\n" );
162                    } else {
163                            warn "# can't call request on nothing!";
164                    }
165    
166            };
167    
168            if ( $@ ) {
169                    warn $@;
170                    $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
171                    $req->print( qq{<pre class="frey-error">$@<pre>} );
172    #               Carp::REPL::repl;
173            }
174    
175            # If this is a request for the pushtream, then give them that
176            if($path =~ /pushstream/) {
177                    pushstream($req);
178            }
179    
180            # If they are sending us a message, we give them a thread for that too
181            if($path =~ /sendmessage/) {
182                    send_message($req);
183            }
184    
185            if ($req->conn ) {
186                    $req->conn->close;
187                    warn "## close connection: $@";
188            }
189  }  }
190    
191  # Here we accept a connection to the browser, and keep it open. Meanwhile we  # Here we accept a connection to the browser, and keep it open. Meanwhile we
# Line 102  sub send_message { Line 225  sub send_message {
225    }    }
226  }  }
227    
228  # This isn't a pushstream, nor a new message. It is just the main page. We loop  1;
 # in case they ask for it multiple times :)  
 sub send_base_page {  
   my ($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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