/[cwmp]/google/trunk/lib/CWMP/Session.pm
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google/lib/CWMP/Server.pm revision 43 by dpavlin, Tue Jun 19 18:50:28 2007 UTC google/trunk/lib/CWMP/Session.pm revision 209 by dpavlin, Sun Nov 18 16:43:09 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  create_dump
11    session
12    
13  sock  sock
14    state
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::Methods;
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 => { ... },
38            debug => 1,
39            create_dump => 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            confess "need store" unless $self->store;
50            my $peerhost = $self->sock->peerhost || confess "can't get sock->peerhost";
51    
52  sub run {          $self->debug( 0 ) unless $self->debug;
         my $self = shift;  
53    
54          my $listen = IO::Socket::INET->new(          warn "created ", __PACKAGE__, "(", dump( @_ ), ") for $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";  
                 }  
55    
56                  warn "...returning to accepting new connections\n";          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            $self->create_dump( 1 ) if $self->debug > 2;
67    
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
82    
83    my $dump_nr = 0;
84    
85  sub process_request {  sub process_request {
86          my $self = shift;          my $self = shift;
87    
88          my $sock = $self->sock || die "no sock?";          my $sock = $self->sock || die "no sock?";
89    
90          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' );
91    
92          if ( ! $sock->connected ) {          if ( ! $sock->connected ) {
93                  warn "SOCKET NOT CONNECTED";                  warn "SOCKET NOT CONNECTED\n";
94                  return 0;                  return 0;
95          }          }
96    
97          $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");  
   
         $line =~ s/[\r\n]+$//;  
         if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) {  
                 return $self->error(400, "Bad request");  
         }  
         my ($method, $req, $protocol) = ($1, $2, $3);  
         warn "<<<< ",join(" ", time, $method, $req)."\n";  
   
         ### read in other headers  
         $self->read_headers || return $self->error(400, "Strange headers");  
98    
99          ### do we support the type          # why do I have to do this?
100  #       if ($method !~ /GET|POST|HEAD/) {          # solution from http://use.perl.org/~Matts/journal/12896
101          if ($method !~ /POST/) {          ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new;
                 return $self->error(400, "Unsupported Method");  
         }  
102    
103      my $chunk;          my $r = $sock->get_request || confess "can't get_request";
         my $transfer_encoding = $self->header('Transfer-Encoding');  
104    
105          if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {          my $xml = $r->content;
106    
107                  my $len = 0;          my $size = length( $xml );
108    
109                  do {          warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n";
110    
111                          warn "get chunk len\n" if $self->debug;          $dump_nr++;
112                                    my $file = sprintf("dump/%04d-%s.request", $dump_nr, $sock->peerhost);
                         my $hex;  
                         do {  
                                 $hex = $sock->getline;  
                                 $hex =~ s/[\n\r]+$//;  
                         } until ( $hex ne '' );  
113    
114                          die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);          if ( $self->create_dump ) {
115                          $len = hex( $hex );                  write_file( $file, $r->as_string );
116                    warn "### request dumped to file: $file\n" if $self->debug;
117            }
118    
119                          warn "getting chunk of $len bytes\n" if $self->debug;          my $state;
120    
121                          $sock->read( my $buff, $len );          if ( $size > 0 ) {
                         $chunk .= $buff;  
122    
123                          warn "--- $len bytes: --=>||$buff||<=--\n";                  die "no SOAPAction header in ",dump($xml) unless defined ( $r->header('SOAPAction') );
124    
125                  } while ( $len > 0 );                  warn "## request payload: ",length($xml)," bytes\n$xml\n" if $self->debug;
126    
127          } else {                  $state = CWMP::Request->parse( $xml );
                 die "right now, we support only Transfer-Encoding: chunked";  
         }  
128    
129          warn "handler got ", length($chunk), " bytes\n" if $self->debug;                  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          warn "<<< " . localtime() . " " . $sock->peerhost . "\n";                  warn "## acquired state = ", dump( $state ), "\n" if $self->debug;
135    
136          die "not SOAP request" unless defined ( $self->header('SOAPAction') );                  if ( ! defined( $state->{DeviceID} ) ) {
137                            warn "## state with DeviceID, using old one...\n";
138                            $state->{DeviceID} = $self->state->{DeviceID};
139                    }
140    
141          my $state;                  $self->state( $state );
142                    $self->store->update_state( $state );
143    
144          if ( $chunk ) {          } else {
                 warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;  
145    
146                  $state = CWMP::Request->parse( $chunk );                  warn "## empty request, using last request state\n";
147    
148                  warn "acquired state = ", dump( $state ), "\n";                  $state = $self->state;
149                            delete( $state->{_dispatch} );
150          } else {                  #warn "last request state = ", dump( $state ), "\n" if $self->debug > 1;
                 warn "empty request\n";  
151          }          }
152    
153    
154          my $response = CWMP::Response->new({ debug => $self->debug });          $sock->send(join("\r\n",
155                    'HTTP/1.1 200 OK',
156          $sock->send(join("",                  'Content-Type: text/xml; charset="utf-8"',
157                  $self->status(200,'OK'),                  'Server: AcmeCWMP/42',
158                  $self->content_type('text/xml; charset="utf-8"'),                  'SOAPServer: AcmeCWMP/42'
159                  "Server: AcmeCWMP/42\r\n",          )."\r\n");
                 "SOAPServer: AcmeCWMP/42\r\n"  
         ));  
160    
161          $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} );
162            
163          my $xml = '';          my $uid = $self->store->state_to_uid( $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} ) {          if ( my $dispatch = $state->{_dispatch} ) {
173                  if ( $response->can( $dispatch ) ) {                  $xml = $self->dispatch( $dispatch );
174                          warn ">>> dispatching to $dispatch\n";          } elsif ( $job = $queue->dequeue ) {
175                          $xml = $response->$dispatch( $state ) . "\r\n";                  $xml = $self->dispatch( $job->dispatch );
176                          warn "## response payload: ",length($xml)," bytes\n$xml\n";          } elsif ( $size == 0 ) {
177                  } else {                  warn ">>> no more queued commands, closing connection to $uid\n";
178                          confess "can't dispatch to $dispatch";                  return 0;
                 }  
179          } else {          } else {
180                  warn ">>> empty response\n";                  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" );          $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" );
186          $sock->send( "$xml\r\n\r\n" ) or die "can't send response";          $sock->send( $xml ) or die "can't send response";
187    
188          warn "### request over";          warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes to $uid\n";
189    
190  };          $job->finish if $job;
191            warn "### request over for $uid\n" if $self->debug;
192    
193            return 1;       # next request
194    };
195    
196  sub read_headers {  =head2 dispatch
   my $self = shift;  
197    
198    $self->{headers} = {};    $xml = $self->dispatch('Inform', $response_arguments );
199    
200    while (defined($_ = $self->sock->getline)) {  If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >>
     s/[\r\n]+$//;  
     last unless length $_;  
         warn "-- $_\n";  
     return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;  
     $self->{headers}->{$1} = $2;  
   }  
201    
202    return 1;  =cut
 }  
203    
204  sub header {  sub dispatch {
205          my $self = shift;          my $self = shift;
206          my $header = shift || die "no header?";  
207          if ( defined( $self->{headers}->{$header} )) {          my $dispatch = shift || die "no dispatch?";
208                  return $self->{headers}->{$header};          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" if $self->debug;
220                    }
221                    return $xml;
222          } else {          } else {
223                  return;                  confess "can't dispatch to $dispatch";
224          }          }
225  }  };
226    
 sub content_type {  
   my ($self, $type) = @_;  
   $self->http_header;  
   return "Content-type: $type\r\n";  
 }  
227    
228  sub error{  =head2 error
   my ($self, $number, $msg) = @_;  
   $self->sock->send( $self->status($number, $msg) . "\r\n" );  
   warn "Error - $number - $msg\n";  
 }  
229    
230  sub status {    return $self->error( 501, 'System error' );
   my ($self, $number, $msg) = @_;  
   $msg = '' if ! defined $msg;  
   return if $self->http_header($number);  
   return "Status $number: $msg\r\n";  
 }  
231    
232  sub http_header {  =cut
233    my $self = shift;  
234    my $number = shift || 200;  sub error {
235    return if ! delete $self->{needs_header};    my ($self, $number, $msg) = @_;
236    $self->sock->send("HTTP/1.1 $number\r\n");    $msg ||= 'ERROR';
237    return 1;    $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;  1;
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