/[cwmp]/google/trunk/lib/CWMP/Session.pm
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google/lib/CWMP/Server.pm revision 44 by dpavlin, Tue Jun 19 19:09:16 2007 UTC google/trunk/lib/CWMP/Session.pm revision 119 by dpavlin, Fri Oct 26 15:51:27 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;
# Line 7  use warnings; Line 7  use warnings;
7  use base qw/Class::Accessor/;  use base qw/Class::Accessor/;
8  __PACKAGE__->mk_accessors( qw/  __PACKAGE__->mk_accessors( qw/
9  debug  debug
10  port  store_path
11    
12  sock  sock
13    state
14    queue
15    store
16  / );  / );
17    
18  use IO::Socket::INET;  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 cluck/;  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 new  =head2 new
34    
35    my $server = CWMP::Server->new({ port => 3333 });    my $server = CWMP::Session->new({
36            sock => $io_socket_object,
37            store_path => 'state.db',
38            queue => [ qw/GetRPCMethods GetParameterNames/ ],
39            debug => 1,
40      });
41    
42  =head2 run  =cut
43    
44    $server->run();  sub new {
45            my $class = shift;
46            my $self = $class->SUPER::new( @_ );
47    
48  =cut          confess "need sock" unless $self->sock;
49    
50  sub run {          $self->debug( 0 ) unless $self->debug;
         my $self = shift;  
51    
52          my $listen = IO::Socket::INET->new(          warn "created ", __PACKAGE__, "(", dump( @_ ), ") for ", $self->sock->peerhost, "\n" if $self->debug;
                 Listen    => 5,  
 #               LocalAddr => 'localhost',  
                 LocalPort => $self->port,  
                 Proto     => 'tcp',  
                 Blocking  => 1,  
                 ReuseAddr => 1,  
         );  
   
         warn "waiting for request on port ", $self->port, $/;  
   
         while ( my $sock = $listen->accept ) {  
                 $sock->autoflush(1);  
   
                 warn "connection from ", $sock->peerhost, "\n";  
   
                 $self->sock( $sock );   # FIXME this will not work for multiple clients  
                 while ( $self->process_request ) {  
                         warn "...another one bites a dust...\n";  
                 }  
53    
54                  warn "...returning to accepting new connections\n";          $self->store( CWMP::Store->new({
55          }                  debug => $self->debug,
56                    path => $self->store_path,
57            }) );
58    
59            croak "can't open ", $self->store_path, ": $!" unless $self->store;
60    
61            return $self;
62  }  }
63    
64    =head2 process_request
65    
66    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<< dump/nr.request >> where C<nr> is number from 0 to total number
72    of requests in single session.
73    
74    =cut
75    
76    my $dump_nr = 0;
77    
78  sub process_request {  sub process_request {
79          my $self = shift;          my $self = shift;
80    
81          my $sock = $self->sock || die "no sock?";          my $sock = $self->sock || die "no sock?";
82    
83          die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' );  #       die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' );
84    
85          if ( ! $sock->connected ) {          if ( ! $sock->connected ) {
86                  warn "SOCKET NOT CONNECTED";                  warn "SOCKET NOT CONNECTED\n";
87                  return 0;                  return 0;
88          }          }
89    
90          $sock->autoflush( 1 );          bless $sock, 'HTTP::Daemon::ClientConn';
         $sock->blocking( 1 );  
   
         ### read the first line of response  
         my $line = $sock->getline || $self->error(400, "No Data");  
91    
92          $line =~ s/[\r\n]+$//;          # why do I have to do this?
93          if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) {          # solution from http://use.perl.org/~Matts/journal/12896
94                  return $self->error(400, "Bad request");          ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new;
         }  
         my ($method, $req, $protocol) = ($1, $2, $3);  
         warn "<<<< ",join(" ", time, $method, $req)."\n";  
95    
96          ### read in other headers          my $r = $sock->get_request || confess "can't get_request";
         $self->read_headers || return $self->error(400, "Strange headers");  
97    
98          ### do we support the type          my $chunk = $r->content;
 #       if ($method !~ /GET|POST|HEAD/) {  
         if ($method !~ /POST/) {  
                 return $self->error(400, "Unsupported Method");  
         }  
99    
100      my $chunk;          my $size = length( $chunk );
         my $transfer_encoding = $self->header('Transfer-Encoding');  
101    
102          if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {          warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n";
103    
104                  my $len = 0;          if ( $self->debug > 2 ) {
105                    my $file = sprintf("dump/%04d.request", $dump_nr++);
106                  do {                  write_file( $file, $r->as_string );
107                    warn "### request dump: $file\n";
108            }
109    
110                          warn "get chunk len\n" if $self->debug;          my $state;
                           
                         my $hex;  
                         do {  
                                 $hex = $sock->getline;  
                                 $hex =~ s/[\n\r]+$//;  
                         } until ( $hex ne '' );  
111    
112                          die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);          if ( $size > 0 ) {
                         $len = hex( $hex );  
113    
114                          warn "getting chunk of $len bytes\n" if $self->debug;                  die "no SOAPAction header in ",dump($chunk) unless defined ( $r->header('SOAPAction') );
115    
116                          $sock->read( my $buff, $len );                  $state = CWMP::Request->parse( $chunk );
                         $chunk .= $buff;  
117    
118                          warn "--- $len bytes: --=>||$buff||<=--\n";                  warn "## acquired state = ", dump( $state ), "\n";
119    
120                  } while ( $len > 0 );                  $self->state( $state );
121                    $self->store->update_state( ID => $state->{ID}, $state );
122    
123          } else {          } else {
                 die "right now, we support only Transfer-Encoding: chunked";  
         }  
   
         warn "handler got ", length($chunk), " bytes\n" if $self->debug;  
124    
125          warn "<<< " . localtime() . " " . $sock->peerhost . "\n";                  warn "## empty request\n";
   
         die "not SOAP request" unless defined ( $self->header('SOAPAction') );  
   
         my $state;  
126    
127          if ( $chunk ) {                  $state = $self->state;
128                  warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;                  delete( $state->{_dispatch} );
129                    warn "last request state = ", dump( $state ), "\n" if $self->debug > 1;
                 $state = CWMP::Request->parse( $chunk );  
   
                 warn "acquired state = ", dump( $state ), "\n";  
           
         } else {  
                 warn "empty request\n";  
130          }          }
131    
132    
         my $response = CWMP::Response->new({ debug => $self->debug });  
   
133          $sock->send(join("\r\n",          $sock->send(join("\r\n",
134                  'HTTP/1.1 200 OK',                  'HTTP/1.1 200 OK',
135                  'Content-Type: text/xml; charset="utf-8"',                  'Content-Type: text/xml; charset="utf-8"',
136                  'Server: AcmeCWMP/42',                  'Server: AcmeCWMP/42',
137                  'SOAPServer: AcmeCWMP/42',                  'SOAPServer: AcmeCWMP/42'
138          ));          )."\r\n");
139    
140          $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} );          $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} );
141                    
142          my $xml = '';          my $xml = '';
143    
144          if ( my $dispatch = $state->{_dispatch} ) {          if ( my $dispatch = $state->{_dispatch} ) {
145                  if ( $response->can( $dispatch ) ) {                  $xml = $self->dispatch( $dispatch );
146                          warn ">>> dispatching to $dispatch\n";          } elsif ( $dispatch = shift @{ $self->queue } ) {
147                          $xml = $response->$dispatch( $state ) . "\r\n";                  $xml = $self->dispatch( $dispatch );
148                          warn "## response payload: ",length($xml)," bytes\n$xml\n";          } elsif ( $size == 0 ) {
149                  } else {                  warn ">>> closing connection\n";
150                          confess "can't dispatch to $dispatch";                  return 0;
                 }  
151          } else {          } else {
152                  warn ">>> empty response\n";                  warn ">>> empty response\n";
153                    $state->{NoMoreRequests} = 1;
154                    $xml = $self->dispatch( 'xml', sub {} );
155          }          }
156    
157          $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );          $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );
158          $sock->send( $xml ) or die "can't send response";          $sock->send( $xml ) or die "can't send response";
159    
160          warn "### request over";          warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes\n";
161    
162  };          warn "### request over\n" if $self->debug;
163    
164            return 1;       # next request
165    };
166    
167  sub read_headers {  =head2 dispatch
   my $self = shift;  
168    
169    $self->{headers} = {};    $xml = $self->dispatch('Inform', $response_arguments );
170    
171    while (defined($_ = $self->sock->getline)) {  If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >>
     s/[\r\n]+$//;  
     last unless length $_;  
         warn "-- $_\n";  
     return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;  
     $self->{headers}->{$1} = $2;  
   }  
172    
173    return 1;  =cut
 }  
174    
175  sub header {  sub dispatch {
176          my $self = shift;          my $self = shift;
177          my $header = shift || die "no header?";  
178          if ( defined( $self->{headers}->{$header} )) {          my $dispatch = shift || die "no dispatch?";
179                  return $self->{headers}->{$header};  
180            my $response = CWMP::Response->new({ debug => $self->debug });
181    
182            if ( $response->can( $dispatch ) ) {
183                    warn ">>> dispatching to $dispatch\n";
184                    my $xml = $response->$dispatch( $self->state, @_ );
185                    warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
186                    if ( $self->debug > 2 ) {
187                            my $file = sprintf("dump/%04d.response", $dump_nr++);
188                            write_file( $file, $xml );
189                            warn "### response dump: $file\n";
190                    }
191                    return $xml;
192          } else {          } else {
193                  return;                  confess "can't dispatch to $dispatch";
194          }          }
195  }  };
196    
197    
198    =head2 error
199    
200      return $self->error( 501, 'System error' );
201    
202    =cut
203    
204  sub error {  sub error {
205    my ($self, $number, $msg) = @_;    my ($self, $number, $msg) = @_;
206    $msg ||= 'ERROR';    $msg ||= 'ERROR';
207    $self->sock->send( "HTTP/1.1 $number $msg\r\n" );    $self->sock->send( "HTTP/1.1 $number $msg\r\n" );
208    warn "Error - $number - $msg\n";    warn "Error - $number - $msg\n";
209      return 0;     # close connection
210  }  }
211    
212  1;  1;
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