/[cwmp]/google/trunk/lib/CWMP/Session.pm
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google/lib/CWMP/Server.pm revision 35 by dpavlin, Tue Jun 19 00:18:56 2007 UTC google/trunk/lib/CWMP/Session.pm revision 206 by dpavlin, Wed Nov 14 23:07:42 2007 UTC
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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/confess cluck croak/;
21    use File::Slurp;
22    
23  use CWMP::Request;  use CWMP::Request;
24  use CWMP::Response;  use CWMP::Methods;
25    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      my $server = CWMP::Session->new({
36            sock => $io_socket_object,
37            store => { ... },
38            debug => 1,
39            create_dump => 1,
40      });
41    
42    =cut
43    
44    sub new {
45            my $class = shift;
46            my $self = $class->SUPER::new( @_ );
47    
48            confess "need sock" unless $self->sock;
49            confess "need store" unless $self->store;
50            my $peerhost = $self->sock->peerhost || confess "can't get sock->peerhost";
51    
52            $self->debug( 0 ) unless $self->debug;
53    
54            warn "created ", __PACKAGE__, "(", dump( @_ ), ") for $peerhost\n" if $self->debug;
55    
56            my $store_obj = CWMP::Store->new({
57                    debug => $self->debug,
58                    %{ $self->store },
59            });
60    
61            croak "can't open ", dump( $self->store ), ": $!" unless $store_obj;
62    
63            # FIXME looks ugly. Should we have separate accessor for this?
64            $self->store( $store_obj );
65    
66  We override L<HTTP::Server::Simple::CGI/handler> so that we can support          $self->create_dump( 1 ) if $self->debug > 2;
67  chunked transfer encoding.  
68            return $self;
69    }
70    
71    =head2 process_request
72    
73    One request from client/response from server cycle. Call multiple times to
74    facilitate brain-dead concept of adding state to stateless protocol like
75    HTTP.
76    
77    If used with debugging level of 3 or more, it will also create dumps of
78    requests named C<< dump/nr.request >> where C<nr> is number from 0 to total number
79    of requests in single session.
80    
81  =cut  =cut
82    
83  sub handler {  my $dump_nr = 0;
84      my $self = shift;  
85    sub process_request {
86            my $self = shift;
87    
88            my $sock = $self->sock || die "no sock?";
89    
90      my $chunk;  #       die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' );
91    
92          my $transfer_encoding = $self->header('Transfer-Encoding');          if ( ! $sock->connected ) {
93                    warn "SOCKET NOT CONNECTED\n";
94                    return 0;
95            }
96    
97            bless $sock, 'HTTP::Daemon::ClientConn';
98    
99            # why do I have to do this?
100            # solution from http://use.perl.org/~Matts/journal/12896
101            ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new;
102    
103          if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {          my $r = $sock->get_request || confess "can't get_request";
104    
105                  my $len = 0;          my $xml = $r->content;
                 my $hex;  
                 do {  
                         $hex = <STDIN>;         # get chunk length  
                         $hex =~ s/[\n\r]*$//s;  
                         $len = hex( $hex );  
106    
107                          warn "getting chunk of 0x$hex $len bytes\n" if $self->debug;          my $size = length( $xml );
108    
109                          while( $len > 0 ) {          warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n";
                                 my $line = <STDIN>;  
                                 $chunk .= $line;  
                                 $len -= length( $line );  
                         }  
110    
111                  } while ( hex( $hex ) != 0 );          $dump_nr++;
112            my $file = sprintf("dump/%04d-%s.request", $dump_nr, $sock->peerhost);
113    
114            if ( $self->create_dump ) {
115                    write_file( $file, $r->as_string );
116                    warn "### request dumped to file: $file\n";
117          }          }
118    
119          warn "handler got ", length($chunk), " bytes\n" if $self->debug;          my $state;
120    
121      my $cgi  = new CGI( $chunk );          if ( $size > 0 ) {
122    
123      eval { $self->handle_request($cgi) };                  die "no SOAPAction header in ",dump($xml) unless defined ( $r->header('SOAPAction') );
     if ($@) {  
         my $error = $@;  
         warn $error;  
     }  
 }  
124    
125  =head2 handle_request                  warn "## request payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
126    
127  Implementation of dispatch logic                  $state = CWMP::Request->parse( $xml );
128    
129  =cut                  if ( defined( $state->{_dispatch} ) && $self->create_dump ) {
130                            my $type = sprintf("dump/%04d-%s-%s", $dump_nr, $sock->peerhost, $state->{_dispatch});
131                            symlink $file, $type || warn "can't symlink $file -> $type: $!";
132                    }
133    
134  sub handle_request {                  warn "## acquired state = ", dump( $state ), "\n";
         my ($self, $cgi) = @_;  
                                                                       
         #... do something, print output to default  
         # selected filehandle...  
135    
136          warn ">> " . localtime() . " " . $ENV{REMOTE_ADDR} . "\n";                  if ( ! defined( $state->{DeviceID} ) ) {
137                            warn "## state with DeviceID, using old one...\n";
138                            $state->{DeviceID} = $self->state->{DeviceID};
139                    }
140    
141          warn "not SOAP request" unless defined ( $cgi->header('SOAPAction') );                  $self->state( $state );
142                    $self->store->update_state( ID => $state->{ID}, $state );
143    
144          if ( my $payload = $cgi->param('POSTDATA') ) {          } else {
                 warn "request payload:\n$payload\n" if $self->debug;  
145    
146                  my $state = CWMP::Request->parse( $payload );                  warn "## empty request, using last request state\n";
147    
148                  warn "acquired state = ", dump( $state );                  $state = $self->state;
149                            delete( $state->{_dispatch} );
150                    #warn "last request state = ", dump( $state ), "\n" if $self->debug > 1;
151          }          }
152    
         my $response = CWMP::Response->new({ debug => $self->debug });  
153    
154          print "Content-Type: text/xml\r\n\r\n";          $sock->send(join("\r\n",
155                    'HTTP/1.1 200 OK',
156                    'Content-Type: text/xml; charset="utf-8"',
157                    'Server: AcmeCWMP/42',
158                    'SOAPServer: AcmeCWMP/42'
159            )."\r\n");
160    
161            $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} );
162    
163            my $uid = $self->store->ID_to_uid( $state->{ID}, $state );
164    
165            my $queue = CWMP::Queue->new({
166                    id => $uid,
167                    debug => $self->debug,
168            });
169            my $job;
170            $xml = '';
171    
172            if ( my $dispatch = $state->{_dispatch} ) {
173                    $xml = $self->dispatch( $dispatch );
174            } elsif ( $job = $queue->dequeue ) {
175                    $xml = $self->dispatch( $job->dispatch );
176            } elsif ( $size == 0 ) {
177                    warn ">>> no more queued commands, closing connection to $uid\n";
178                    return 0;
179            } else {
180                    warn ">>> empty response to $uid\n";
181                    $state->{NoMoreRequests} = 1;
182                    $xml = $self->dispatch( 'xml', sub {} );
183            }
184    
185            $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );
186            $sock->send( $xml ) or die "can't send response";
187    
188            warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes to $uid\n";
189    
190          print $response->Inform;          $job->finish if $job;
191                    warn "### request over for $uid\n" if $self->debug;
192    
193            return 1;       # next request
194  };  };
195    
196  1;  =head2 dispatch
197    
198      $xml = $self->dispatch('Inform', $response_arguments );
199    
200    If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >>
201    
202    =cut
203    
204    sub dispatch {
205            my $self = shift;
206    
207            my $dispatch = shift || die "no dispatch?";
208            my $args = shift;
209    
210            my $response = CWMP::Methods->new({ debug => $self->debug });
211    
212            if ( $response->can( $dispatch ) ) {
213                    warn ">>> dispatching to $dispatch with args ",dump( $args ),"\n";
214                    my $xml = $response->$dispatch( $self->state, $args );
215                    warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
216                    if ( $self->create_dump ) {
217                            my $file = sprintf("dump/%04d-%s.response", $dump_nr++, $self->sock->peerhost);
218                            write_file( $file, $xml );
219                            warn "### response dump: $file\n";
220                    }
221                    return $xml;
222            } else {
223                    confess "can't dispatch to $dispatch";
224            }
225    };
226    
227    
228    =head2 error
229    
230      return $self->error( 501, 'System error' );
231    
232    =cut
233    
234    sub error {
235      my ($self, $number, $msg) = @_;
236      $msg ||= 'ERROR';
237      $self->sock->send( "HTTP/1.1 $number $msg\r\n" );
238      warn "Error - $number - $msg\n";
239      return 0;     # close connection
240    }
241    
242    1;
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