/[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 589 by dpavlin, Fri Nov 28 15:07:32 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) = @_;
64      
65    my $path = $req->request->url->path;  #       $req->send_headers("X-Frey-VERSION: $Frey::VERSION");
66    print STDERR "Path: '$path'\n";  
67            my $path = $req->request->url->path;
         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);  
   }  
68    
69    # Otherwise, lets give them the base page          eval {
70    send_base_page($req);  
71                    if ( $path =~ m{/reload(.*)} ) {
72    
73                            $ENV{FREY_NO_LOG} = 1;
74                            my $cmd = "perl -c $0";
75                            warn "# check config with $cmd";
76                            if ( system($cmd) == 0 ) {
77                                    $req->print( "\r\n" );
78                                    my $server = Frey::Server->new;
79                                    $server->load_config;
80                                    $req->print( "\r\n" );
81                                    Module::Reload->check;
82                                    $req->print( "\r\n" );
83                                    $req->print( refresh( $1, 1 ) );
84                                    $req->print( "\r\n" );
85                                    warn "# reload done";
86                                    return;
87                            } else {
88                                    warn "ERROR: $?";
89                            }
90                            $ENV{FREY_NO_LOG} = 0;
91            
92                    } elsif ( $path =~ m{/exit(.*)} ) {
93                            # FIXME do we need some kind of check here for production? :-)
94                            # ./bin/dev.sh will restart us during development
95                            $req->print( refresh( $1, 2 ) );
96                            $req->print( "\r\n" );
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{/([^/]+)/(\w*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                            $req->print( "\r\n\r\n" ); # send something to browser so we don't time-out
144                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, %$run );
145                    } elsif (
146                            $path =~ m{/([^/]+)/?$}
147                    ) {
148                            my $class = rest2class $1;
149                            warn "# introspect $class";
150                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, %$run );
151                    } else {
152                            $f = Frey::Run->new( class => 'Frey::ClassBrowser', %$run );
153                    }
154    
155                    if ( $f ) {
156                            $f->clean_status;
157                            $f->add_status( { request => $req } );
158                            $f->status_parts;
159                            if ( my $html = $f->html ) {
160                                    warn "## html ",length($html)," bytes";
161                                    $req->print( $html );
162                            } else {
163                                    confess "no output from $f";
164                            }
165                    } else {
166                            confess "# can't call request on nothing!";
167                    }
168    
169            };
170    
171            if ( $@ ) {
172                    warn "SERVER ERROR: $@";
173    #               $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
174                    $req->print( qq{<pre class="frey-error">$@<pre>\r\n\r\n} );
175    #               Carp::REPL::repl;
176            }
177    
178            # If this is a request for the pushtream, then give them that
179            if($path =~ /pushstream/) {
180                    pushstream($req);
181            }
182    
183            # If they are sending us a message, we give them a thread for that too
184            if($path =~ /sendmessage/) {
185                    send_message($req);
186            }
187    
188            if ( $req->conn ) {
189                    $req->print( "\r\n" ); # flush
190                    $req->conn->close;
191                    warn "## close connection: $@";
192            }
193  }  }
194    
195  # 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 229  sub send_message {
229    }    }
230  }  }
231    
232  # This isn't a pushstream, nor a new message. It is just the main page. We loop  sub refresh {
233  # in case they ask for it multiple times :)          my ( $url, $time ) = @_;
234  sub send_base_page {          $url  ||= '/';
235    my ($req) = @_;          $time ||= 1;
236    while(1) {          warn "# refresh $url";
237          warn "base page";          qq|
238          $req->out( Template::Declare->show( 'user' ) );                  <html>
239  =for later                  <head>
240      $req->print(qq{                          <META HTTP-EQUIV="Refresh" CONTENT="$time; URL=$url"></META>
241        <html>                  </head>
242          <head>                  <body>
243            <title>Chat!</title>                          Refresh <a href="$url"><tt>$url</tt></a> in $time sec
244            <script src="jquery.js" type="text/javascript"></script>                  </body>
245            <script src="chat-ajax-push.js" type="text/javascript"></script>                  </html>
246          </head>                  \n\r\n\r
247          <body>          |; # XXX newlines at end are important to flush content to browser
           <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;  
   }  
248  }  }
249    
250    1;
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