/[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/trunk/lib/CWMP/Session.pm revision 223 by dpavlin, Sat Nov 24 02:17:40 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    create_dump
11    session
12    
13    sock
14    state
15    store
16  / );  / );
17    
18    use HTTP::Daemon;
19  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
20    use Carp qw/carp confess cluck croak/;
21    use File::Slurp;
22    
23  use CWMP::Request;  use CWMP::Request;
24  use CWMP::Response;  use CWMP::Methods;
25  use Carp qw/confess/;  use CWMP::Store;
26    
27    #use Devel::LeakTrace::Fast;
28    
29  =head1 NAME  =head1 NAME
30    
31  CWMP::Server - implement logic of CWMP protocol  CWMP::Session - implement logic of CWMP protocol
32    
33  =head1 METHODS  =head1 METHODS
34    
35  =head2 handler  =head2 new
36    
37  We override L<HTTP::Server::Simple::CGI/handler> so that we can support    my $server = CWMP::Session->new({
38  chunked transfer encoding.          sock => $io_socket_object,
39            store => { ... },
40            debug => 1,
41            create_dump => 1,
42      });
43    
44  =cut  =cut
45    
46  sub handler {  sub new {
47      my $self = shift;          my $class = shift;
48            my $self = $class->SUPER::new( @_ );
     my $chunk;  
49    
50          my $transfer_encoding = $self->header('Transfer-Encoding');          confess "need sock" unless $self->sock;
51            confess "need store" unless $self->store;
52            my $peerhost = $self->sock->peerhost || confess "can't get sock->peerhost";
53    
54          if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {          $self->debug( 0 ) unless $self->debug;
55    
56                  my $len = 0;          warn "created ", __PACKAGE__, "(", dump( @_ ), ") for $peerhost\n" if $self->debug;
                 my $hex;  
                 do {  
                         $hex = <STDIN>;         # get chunk length  
                         $hex =~ s/[\n\r]*$//s;  
                         $len = hex( $hex );  
57    
58                          warn "getting chunk of 0x$hex $len bytes\n" if $self->debug;          my $store_obj = CWMP::Store->new({
59                    debug => $self->debug,
60                    %{ $self->store },
61            });
62    
63                          while( $len > 0 ) {          croak "can't open ", dump( $self->store ), ": $!" unless $store_obj;
                                 my $line = <STDIN>;  
                                 $chunk .= $line;  
                                 $len -= length( $line );  
                         }  
64    
65                  } while ( hex( $hex ) != 0 );          # FIXME looks ugly. Should we have separate accessor for this?
66          }          $self->store( $store_obj );
   
         warn "handler got ", length($chunk), " bytes\n" if $self->debug;  
67    
68      my $cgi  = new CGI( $chunk );          $self->create_dump( 1 ) if $self->debug > 2;
69    
70      eval { $self->handle_request($cgi) };          return $self;
     if ($@) {  
         my $error = $@;  
         warn $error;  
     }  
71  }  }
72    
73  =head2 handle_request  =head2 process_request
74    
75  Implementation of dispatch logic  One request from client/response from server cycle. Call multiple times to
76    facilitate brain-dead concept of adding state to stateless protocol like
77    HTTP.
78    
79    If used with debugging level of 3 or more, it will also create dumps of
80    requests named C<< dump/nr.request >> where C<nr> is number from 0 to total number
81    of requests in single session.
82    
83  =cut  =cut
84    
85  sub handle_request {  my $dump_nr = 0;
         my ($self, $cgi) = @_;  
                                                                       
         #... do something, print output to default  
         # selected filehandle...  
86    
87          warn "<<< " . localtime() . " " . $ENV{REMOTE_ADDR} . "\n";  sub process_request {
88            my $self = shift;
89    
90          warn "not SOAP request" unless defined ( $cgi->header('SOAPAction') );          my $sock = $self->sock || die "no sock?";
91    
92          my $state;  #       die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' );
93    
94          if ( my $payload = $cgi->param('POSTDATA') ) {          if ( ! $sock->connected ) {
95                  warn "request payload:\n$payload\n" if $self->debug;                  warn "SOCKET NOT CONNECTED\n";
96                    return 0;
97            }
98    
99                  $state = CWMP::Request->parse( $payload );          bless $sock, 'HTTP::Daemon::ClientConn';
100    
101                  warn "acquired state = ", dump( $state );          # why do I have to do this?
102            # solution from http://use.perl.org/~Matts/journal/12896
103            ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new;
104    
105            my $r = $sock->get_request;
106                    
107          } else {          if ( ! $r ) {
108                  warn "empty request\n";                  carp "can't get_request";
109                    return 0;
110          }          }
111    
112          my $response = CWMP::Response->new({ debug => $self->debug });          my $xml = $r->content;
113    
114            my $size = length( $xml );
115    
116            warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n";
117    
118            $dump_nr++;
119            my $file = sprintf("dump/%04d-%s.request", $dump_nr, $sock->peerhost);
120    
121            if ( $self->create_dump ) {
122                    write_file( $file, $r->as_string );
123                    warn "### request dumped to file: $file\n" if $self->debug;
124            }
125    
126            my $state;
127    
128            if ( $size > 0 ) {
129    
130                    die "no SOAPAction header in ",dump($xml) unless defined ( $r->header('SOAPAction') );
131    
132                    warn "## request payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
133    
134                    $state = CWMP::Request->parse( $xml );
135    
136                    if ( defined( $state->{_dispatch} ) && $self->create_dump ) {
137                            my $type = sprintf("dump/%04d-%s-%s", $dump_nr, $sock->peerhost, $state->{_dispatch});
138                            symlink $file, $type || warn "can't symlink $file -> $type: $!";
139                    }
140    
141                    warn "## acquired state = ", dump( $state ), "\n" if $self->debug;
142    
143                    if ( ! defined( $state->{DeviceID} ) ) {
144                            warn "## state with DeviceID, using old one...\n";
145                            $state->{DeviceID} = $self->state->{DeviceID};
146                    }
147    
148                    $self->state( $state );
149                    $self->store->update_state( $state );
150    
151            } else {
152    
153          print "Content-Type: text/xml\r\n\r\n";                  warn "## empty request, using last request state\n";
154    
155                    $state = $self->state;
156                    delete( $state->{_dispatch} );
157                    #warn "last request state = ", dump( $state ), "\n" if $self->debug > 1;
158            }
159    
160            $sock->send(join("\r\n",
161                    'HTTP/1.1 200 OK',
162                    'Content-Type: text/xml; charset="utf-8"',
163                    'Server: PerlCWMP/42',
164                    'SOAPServer: PerlCWMP/42'
165            )."\r\n");
166    
167            $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} );
168    
169            my $uid = $self->store->state_to_uid( $state );
170    
171            my $to_uid = join(" ", grep { defined($_) } "to $uid",
172                            # board
173                            $state->{Parameter}->{'InternetGatewayDevice.DeviceInfo.HardwareVersion'},
174                            # version
175                            $state->{Parameter}->{'InternetGatewayDevice.DeviceInfo.SoftwareVersion'},
176                            # summary
177    #                       $state->{Parameter}->{'InternetGatewayDevice.DeviceSummary'},
178            ) . "\n";
179    
180            my $queue = CWMP::Queue->new({
181                    id => $uid,
182                    debug => $self->debug,
183            });
184            my $job;
185            $xml = '';
186    
187          if ( my $dispatch = $state->{_dispatch} ) {          if ( my $dispatch = $state->{_dispatch} ) {
188                  if ( $response->can( $dispatch ) ) {                  $xml = $self->dispatch( $dispatch );
189                          warn ">>> dispatching to $dispatch\n";          } elsif ( $job = $queue->dequeue ) {
190                          print $response->$dispatch;                  $xml = $self->dispatch( $job->dispatch );
191                  } else {          } elsif ( $size == 0 ) {
192                          confess "can't dispatch to $dispatch";                  warn ">>> no more queued commands, no client pending, closing connection $to_uid";
193                    $sock->close;
194                    return;
195            } else {
196                    warn ">>> empty response $to_uid";
197                    $state->{NoMoreRequests} = 1;
198                    $xml = $self->dispatch( 'xml', sub {} );
199            }
200    
201            $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );
202            $sock->send( $xml ) or die "can't send response";
203    
204            warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes $to_uid";
205    
206            $job->finish if $job;
207            warn "### request over for $uid\n" if $self->debug;
208    
209            return 1;       # next request
210    };
211    
212    =head2 dispatch
213    
214      $xml = $self->dispatch('Inform', $response_arguments );
215    
216    If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >>
217    
218    =cut
219    
220    sub dispatch {
221            my $self = shift;
222    
223            my $dispatch = shift || die "no dispatch?";
224            my $args = shift;
225    
226            my $response = CWMP::Methods->new({ debug => $self->debug });
227    
228            if ( $response->can( $dispatch ) ) {
229                    warn ">>> dispatching to $dispatch with args ",dump( $args ),"\n";
230                    my $xml = $response->$dispatch( $self->state, $args );
231                    warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
232                    if ( $self->create_dump ) {
233                            my $file = sprintf("dump/%04d-%s.response", $dump_nr++, $self->sock->peerhost);
234                            write_file( $file, $xml );
235                            warn "### response dump: $file\n" if $self->debug;
236                  }                  }
237                    return $xml;
238          } else {          } else {
239                  warn ">>> empty response\n";                  confess "can't dispatch to $dispatch";
240          }          }
           
241  };  };
242    
 1;  
243    
244    =head2 error
245    
246      return $self->error( 501, 'System error' );
247    
248    =cut
249    
250    sub error {
251      my ($self, $number, $msg) = @_;
252      $msg ||= 'ERROR';
253      $self->sock->send( "HTTP/1.1 $number $msg\r\n" );
254      warn "Error - $number - $msg\n";
255      return 0;     # close connection
256    }
257    
258    1;
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