/[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 617 by dpavlin, Sat Nov 29 15:05:55 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    our $editor = Frey::Editor->new;
39    
40    sub run {
41            my ( $self, $port ) = @_;
42            $server = Continuity->new(
43                    port => $port || $self->config->{port} || 16001,
44                    path_session => 1,
45                    cookie_session => 'sid',
46                    callback => \&main,
47                    debug_level => 2,
48                    staticp => sub {
49                            $_[0]->url =~ m{^/+(static|var).*\.(jpg|jpeg|gif|png|css|ico|js|html?|xml|json|ya?ml)(\?.*)?$}
50                    },
51            );
52            $Module::Reload::Debug = 1; # auto if debug_level > 1
53            Frey::ClassLoader->new->load_all_classes();
54            $editor->switch_screen if $ENV{FREY_SWITCH_SCREEN};
55            $server->loop;
56    }
57    
58    =head2 main
59    
60    This is simple dispatcher for our server. Currently it's in flux and
61    documented only in source code.
62    
63    =cut
64    
 $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).  
65  sub main {  sub main {
66    my ($req) = @_;          my ($req) = @_;
67      
68    my $path = $req->request->url->path;  #       $req->send_headers("X-Frey-VERSION: $Frey::VERSION");
69    print STDERR "Path: '$path'\n";  
70            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);  
   }  
71    
72    # Otherwise, lets give them the base page          eval {
73    send_base_page($req);  
74                    if ( $path =~ m{/reload(.*)} ) {
75    
76                            $ENV{FREY_NO_LOG} = 1;
77                            my $cmd = "perl -c $0";
78                            warn "# check config with $cmd";
79                            if ( system($cmd) == 0 ) {
80                                    $req->print( "\r\n" );
81                                    my $server = Frey::Server->new;
82                                    $server->load_config;
83                                    $req->print( "\r\n" );
84                                    Module::Reload->check;
85                                    $req->print( "\r\n" );
86                                    $req->print( refresh( $1, 1 ) );
87                                    $req->print( "\r\n" );
88                                    warn "# reload done";
89                                    return;
90                            } else {
91                                    warn "ERROR: $?";
92                            }
93                            $ENV{FREY_NO_LOG} = 0;
94            
95                    } elsif ( $path =~ m{/exit(.*)} ) {
96                            # FIXME do we need some kind of check here for production? :-)
97                            # ./bin/dev.sh will restart us during development
98                            $req->print( refresh( $1, 2 ) );
99                            $req->print( "\r\n" );
100                            exit;
101                    }
102    
103    #               warn $req->request->header('User_Agent');
104    
105                    my %params = $req->params;
106                    my $html;
107    
108                    sub rest2class {
109                            my $class = shift;
110                            $class =~ s/-/::/; # sigh!
111                            return $class;
112                    }
113    
114    
115                    my $f;
116    
117                    # shared run params
118                    my $run = {
119                            request_url => $req->request->url,
120                            debug => 1,
121                    };
122    
123                    if (
124                            $path =~ m{/Frey[:-]+ObjectBrowser}
125                    ) {
126                            $f = Frey::ObjectBrowser->new( fey_class => $params{class} );
127                            $f->request( $req );
128                    } elsif (
129                            $path =~ m{/Frey[:-]+ObjectDesigner}
130                    ) {
131                            $f = Frey::ObjectDesigner->new( fey_class => $params{class} );
132                            $f->request( $req );
133                    } elsif ( $path =~ $editor->url_regex ) {
134                            $req->print( $editor->command( $path ) );
135                            $editor->command( $path );
136                            return;
137                    } elsif (
138                            $path =~ m{/([^/]+)/(\w*as_\w+)/?([^/]+)?}
139                    ) {
140                            my $class = rest2class $1;
141                            warn "# run $path -> $class $2";
142                            $run->{format} = $3 if $3;
143                            $params{request_url} = $req->request->url;
144                            $req->print( "\r\n\r\n" ); # send something to browser so we don't time-out
145                            $f = Frey::Run->new( class => $class, params => \%params, run => $2, %$run );
146                    } elsif (
147                            $path =~ m{/([^/]+)/?$}
148                    ) {
149                            my $class = rest2class $1;
150                            warn "# introspect $class";
151                            $f = Frey::Run->new( class => 'Frey::Introspect', params => { class => $class }, %$run );
152                    } else {
153                            $f = Frey::Run->new( class => 'Frey::ClassBrowser', %$run );
154                    }
155    
156                    if ( $f ) {
157                            $f->clean_status;
158                            $f->add_status( { request => $req } );
159                            $f->status_parts;
160                            if ( my $html = $f->html ) {
161                                    warn "## html ",length($html)," bytes";
162                                    $req->print( $html );
163                            } else {
164                                    confess "no output from $f";
165                            }
166                    } else {
167                            confess "# can't call request on nothing!";
168                    }
169    
170            };
171    
172            if ( $@ ) {
173                    warn "SERVER ERROR: $@";
174    #               $req->conn->send_error( 404 );  # FIXME this should probably be 500, but we can't ship page with it
175                    $req->print( qq{<pre class="frey-error">$@<pre>\r\n\r\n} );
176    #               Carp::REPL::repl;
177            }
178    
179            # If this is a request for the pushtream, then give them that
180            if($path =~ /pushstream/) {
181                    pushstream($req);
182            }
183    
184            # If they are sending us a message, we give them a thread for that too
185            if($path =~ /sendmessage/) {
186                    send_message($req);
187            }
188    
189            if ( $req->conn ) {
190                    $req->print( "\r\n" ); # flush
191                    $req->conn->close;
192                    warn "## close connection: $@";
193            }
194  }  }
195    
196  # 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 230  sub send_message {
230    }    }
231  }  }
232    
233  # This isn't a pushstream, nor a new message. It is just the main page. We loop  sub refresh {
234  # in case they ask for it multiple times :)          my ( $url, $time ) = @_;
235  sub send_base_page {          $url  ||= '/';
236    my ($req) = @_;          $time ||= 1;
237    while(1) {          warn "# refresh $url";
238          warn "base page";          qq|
239          $req->print( Template::Declare->show( 'user' ) );                  <html>
240  =for later                  <head>
241      $req->print(qq{                          <META HTTP-EQUIV="Refresh" CONTENT="$time; URL=$url"></META>
242        <html>                  </head>
243          <head>                  <body>
244            <title>Chat!</title>                          Refresh <a href="$url"><tt>$url</tt></a> in $time sec
245            <script src="jquery.js" type="text/javascript"></script>                  </body>
246            <script src="chat-ajax-push.js" type="text/javascript"></script>                  </html>
247          </head>                  \n\r\n\r
248          <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;  
   }  
249  }  }
250    
251    1;
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