lib/Catalyst/Engine/HTTP/Restarter.pm

   1 package Catalyst::Engine::HTTP::Restarter;
   2
   3 use strict;
   4 use warnings;
   5 use base 'Catalyst::Engine::HTTP';
   6 use Catalyst::Engine::HTTP::Restarter::Watcher;
   7 use NEXT;
   8
   9 sub run {
  10     my ( $self, $class, $port, $host, $options ) = @_;
  11
  12     $options ||= {};
  13
  14     # Setup restarter
  15     unless ( my $restarter = fork ) {
  16
  17         # Prepare
  18         close STDIN;
  19         close STDOUT;
  20
  21         my $watcher = Catalyst::Engine::HTTP::Restarter::Watcher->new(
  22             directory => File::Spec->catdir( $FindBin::Bin, '..' ),
  23             regex     => $options->{restart_regex},
  24             delay     => $options->{restart_delay},
  25         );
  26
  27         $host ||= '127.0.0.1';
  28         while (1) {
  29
  30             # poll for changed files
  31             my @changed_files = $watcher->watch();
  32
  33             # check if our parent process has died
  34             exit if $^O ne 'MSWin32' and getppid == 1;
  35
  36             # Restart if any files have changed
  37             if (@changed_files) {
  38                 my $files = join ', ', @changed_files;
  39                 print STDERR qq/File(s) "$files" modified, restarting\n\n/;
  40
  41                 require IO::Socket::INET;
  42                 require HTTP::Headers;
  43                 require HTTP::Request;
  44
  45                 my $client = IO::Socket::INET->new(
  46                     PeerAddr => $host,
  47                     PeerPort => $port
  48                   )
  49                   or die "Can't create client socket (is server running?): ",
  50                   $!;
  51
  52                 # build the Kill request
  53                 my $req =
  54                   HTTP::Request->new( 'RESTART', '/',
  55                     HTTP::Headers->new( 'Connection' => 'close' ) );
  56                 $req->protocol('HTTP/1.0');
  57
  58                 $client->send( $req->as_string )
  59                   or die "Can't send restart instruction: ", $!;
  60                 $client->close();
  61                 exit;
  62             }
  63         }
  64     }
  65
  66     return $self->NEXT::run( $class, $port, $host, $options );
  67 }
  68
  69 1;
  70 __END__
  71
  72 =head1 NAME
  73
  74 Catalyst::Engine::HTTP::Restarter - Catalyst Auto-Restarting HTTP Engine
  75
  76 =head1 SYNOPSIS
  77
  78     script/myapp_server.pl -restart
  79
  80 =head1 DESCRIPTION
  81
  82 The Restarter engine will monitor files in your application for changes
  83 and restart the server when any changes are detected.
  84
  85 =head1 METHODS
  86
  87 =over 4
  88
  89 =item run
  90
  91 =back
  92
  93 =head1 SEE ALSO
  94
  95 L<Catalyst>, L<Catalyst::Engine::HTTP>, L<Catalyst::Engine::CGI>,
  96 L<Catalyst::Engine>.
  97
  98 =head1 AUTHORS
  99
 100 Sebastian Riedel, <sri@cpan.org>
 101
 102 Dan Kubb, <dan.kubb-cpan@onautopilot.com>
 103
 104 Andy Grundman, <andy@hybridized.org>
 105
 106 =head1 THANKS
 107
 108 Many parts are ripped out of C<HTTP::Server::Simple> by Jesse Vincent.
 109
 110 =head1 COPYRIGHT
 111
 112 This program is free software, you can redistribute it and/or modify it under
 113 the same terms as Perl itself.
 114
 115 =cut