/[cwmp]/google/trunk/lib/CWMP/Session.pm
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google/lib/CWMP/Server.pm revision 36 by dpavlin, Tue Jun 19 00:38:49 2007 UTC google/lib/CWMP/Session.pm revision 111 by dpavlin, Sun Oct 21 22:58:22 2007 UTC
# Line 1  Line 1 
1  # Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST  # Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST
2  package CWMP::Server;  package CWMP::Session;
3    
4  use strict;  use strict;
5  use warnings;  use warnings;
6    
7  use base qw/HTTP::Server::Simple::CGI Class::Accessor/;  use base qw/Class::Accessor/;
8  __PACKAGE__->mk_accessors( qw/  __PACKAGE__->mk_accessors( qw/
9  debug  debug
10    store_path
11    
12    sock
13    state
14    queue
15    store
16  / );  / );
17    
18    use HTTP::Daemon;
19  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
20    use Carp qw/confess cluck croak/;
21    use File::Slurp;
22    
23  use CWMP::Request;  use CWMP::Request;
24  use CWMP::Response;  use CWMP::Response;
25  use Carp qw/confess/;  use CWMP::Store;
26    
27  =head1 NAME  =head1 NAME
28    
29  CWMP::Server - implement logic of CWMP protocol  CWMP::Session - implement logic of CWMP protocol
30    
31  =head1 METHODS  =head1 METHODS
32    
33  =head2 handler  =head2 new
34    
35  We override L<HTTP::Server::Simple::CGI/handler> so that we can support    my $server = CWMP::Session->new({
36  chunked transfer encoding.          sock => $io_socket_object,
37            store_path => 'state.db',
38            queue => [ qw/GetRPCMethods GetParameterNames/ ],
39            debug => 1,
40      });
41    
42  =cut  =cut
43    
44  sub handler {  sub new {
45      my $self = shift;          my $class = shift;
46            my $self = $class->SUPER::new( @_ );
47    
48      my $chunk;          confess "need sock" unless $self->sock;
49    
50          my $transfer_encoding = $self->header('Transfer-Encoding');          $self->debug( 0 ) unless $self->debug;
51    
52          if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {          warn "created ", __PACKAGE__, "(", dump( @_ ), ") for ", $self->sock->peerhost, "\n" if $self->debug;
53    
54                  my $len = 0;          $self->store( CWMP::Store->new({
55                  my $hex;                  debug => $self->debug,
56                  do {                  path => $self->store_path,
57                          $hex = <STDIN>;         # get chunk length          }) );
                         $hex =~ s/[\n\r]*$//s;  
                         $len = hex( $hex );  
58    
59                          warn "getting chunk of 0x$hex $len bytes\n" if $self->debug;          croak "can't open ", $self->store_path, ": $!" unless $self->store;
60    
61                          while( $len > 0 ) {          return $self;
62                                  my $line = <STDIN>;  }
                                 $chunk .= $line;  
                                 $len -= length( $line );  
                         }  
63    
64                  } while ( hex( $hex ) != 0 );  =head2 process_request
         }  
65    
66          warn "handler got ", length($chunk), " bytes\n" if $self->debug;  One request from client/response from server cycle. Call multiple times to
67    facilitate brain-dead concept of adding state to stateless protocol like
68    HTTP.
69    
70    If used with debugging level of 3 or more, it will also create dumps of
71    requests named C<< nr.dump >> where C<nr> is number from 0 to total number
72    of requests in single session.
73    
74      my $cgi  = new CGI( $chunk );  =cut
75    
76      eval { $self->handle_request($cgi) };  my $dump_nr = 0;
     if ($@) {  
         my $error = $@;  
         warn $error;  
     }  
 }  
77    
78  =head2 handle_request  sub process_request {
79            my $self = shift;
80    
81  Implementation of dispatch logic          my $sock = $self->sock || die "no sock?";
82    
83  =cut  #       die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' );
84    
85  sub handle_request {          if ( ! $sock->connected ) {
86          my ($self, $cgi) = @_;                  warn "SOCKET NOT CONNECTED\n";
87                                                                                        return 0;
88          #... do something, print output to default          }
89          # selected filehandle...  
90            bless $sock, 'HTTP::Daemon::ClientConn';
91    
92            # why do I have to do this?
93            # solution from http://use.perl.org/~Matts/journal/12896
94            ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new;
95    
96            my $r = $sock->get_request || confess "can't get_request";
97    
98          warn "<<< " . localtime() . " " . $ENV{REMOTE_ADDR} . "\n";          my $chunk = $r->content;
99    
100          warn "not SOAP request" unless defined ( $cgi->header('SOAPAction') );          my $size = length( $chunk );
101    
102            warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n";
103    
104            if ( $self->debug > 2 ) {
105                    my $file = $dump_nr++ . '.dump';
106                    write_file( $file, $r->as_string );
107                    warn "### request dump: $file\n";
108            }
109    
110          my $state;          my $state;
111    
112          if ( my $payload = $cgi->param('POSTDATA') ) {          if ( $size > 0 ) {
                 warn "request payload:\n$payload\n" if $self->debug;  
113    
114                  $state = CWMP::Request->parse( $payload );                  die "no SOAPAction header in ",dump($chunk) unless defined ( $r->header('SOAPAction') );
115    
116    
117                    if ( $chunk ) {
118                            warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;
119    
120                            $state = CWMP::Request->parse( $chunk );
121    
122                            warn "## acquired state = ", dump( $state ), "\n";
123    
124                            $self->state( $state );
125                            $self->store->update_state( ID => $state->{ID}, $state );
126    
127                    } else {
128                            warn "## empty request\n";
129                    }
130    
                 warn "acquired state = ", dump( $state );  
           
131          } else {          } else {
132                  warn "empty request\n";                  $state = $self->state;
133                    warn "last request state = ", dump( $state ), "\n" if $self->debug > 1;
134          }          }
135    
         my $response = CWMP::Response->new({ debug => $self->debug });  
136    
137          print "Content-Type: text/xml\r\n\r\n";          $sock->send(join("\r\n",
138                    'HTTP/1.1 200 OK',
139                    'Content-Type: text/xml; charset="utf-8"',
140                    'Server: AcmeCWMP/42',
141                    'SOAPServer: AcmeCWMP/42'
142            )."\r\n");
143    
144            $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} );
145            
146            my $xml = '';
147    
148          if ( my $dispatch = $state->{_dispatch} ) {          if ( my $dispatch = $state->{_dispatch} ) {
149                  if ( $response->can( $dispatch ) ) {                  $xml = $self->dispatch( $dispatch );
150                          warn ">>> dispatching to $dispatch\n";          } elsif ( $dispatch = shift @{ $self->queue } ) {
151                          print $response->$dispatch;                  $xml = $self->dispatch( $dispatch );
152                  } else {          } elsif ( $size == 0 ) {
153                          confess "can't dispatch to $dispatch";                  warn ">>> closing connection\n";
154                  }                  return 0;
155          } else {          } else {
156                  warn ">>> empty response\n";                  warn ">>> empty response\n";
157                    $state->{NoMoreRequests} = 1;
158                    $xml = $self->dispatch( 'xml', sub {} );
159          }          }
160            
161            $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );
162            $sock->send( $xml ) or die "can't send response";
163    
164            warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes\n";
165    
166            warn "### request over\n" if $self->debug;
167    
168            return 1;       # next request
169  };  };
170    
171  1;  =head2 dispatch
172    
173      $xml = $self->dispatch('Inform', $response_arguments );
174    
175    =cut
176    
177    sub dispatch {
178            my $self = shift;
179    
180            my $dispatch = shift || die "no dispatch?";
181    
182            my $response = CWMP::Response->new({ debug => $self->debug });
183    
184            if ( $response->can( $dispatch ) ) {
185                    warn ">>> dispatching to $dispatch\n";
186                    my $xml = $response->$dispatch( $self->state, @_ );
187                    warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
188                    return $xml;
189            } else {
190                    confess "can't dispatch to $dispatch";
191            }
192    };
193    
194    
195    =head2 error
196    
197      return $self->error( 501, 'System error' );
198    
199    =cut
200    
201    sub error {
202      my ($self, $number, $msg) = @_;
203      $msg ||= 'ERROR';
204      $self->sock->send( "HTTP/1.1 $number $msg\r\n" );
205      warn "Error - $number - $msg\n";
206      return 0;     # close connection
207    }
208    
209    1;
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