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# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST |
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package CWMP::Session; |
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|
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use strict; |
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use warnings; |
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|
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use base qw/Class::Accessor/; |
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__PACKAGE__->mk_accessors( qw/ |
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debug |
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store |
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|
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sock |
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state |
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store |
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/ ); |
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|
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use HTTP::Daemon; |
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use Data::Dump qw/dump/; |
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use Carp qw/confess cluck croak/; |
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use File::Slurp; |
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|
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use CWMP::Request; |
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use CWMP::Methods; |
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use CWMP::Store; |
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|
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=head1 NAME |
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|
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CWMP::Session - implement logic of CWMP protocol |
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|
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=head1 METHODS |
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|
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=head2 new |
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|
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my $server = CWMP::Session->new({ |
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sock => $io_socket_object, |
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store => 'state.db', |
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debug => 1, |
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}); |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = $class->SUPER::new( @_ ); |
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|
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confess "need sock" unless $self->sock; |
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|
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$self->debug( 0 ) unless $self->debug; |
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|
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warn "created ", __PACKAGE__, "(", dump( @_ ), ") for ", $self->sock->peerhost, "\n" if $self->debug; |
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|
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my $store_obj = CWMP::Store->new({ |
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debug => $self->debug, |
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%{ $self->store }, |
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}); |
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|
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croak "can't open ", dump( $self->store ), ": $!" unless $store_obj; |
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|
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# FIXME looks ugly. Should we have separate accessor for this? |
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$self->store( $store_obj ); |
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|
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return $self; |
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} |
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|
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=head2 process_request |
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|
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One request from client/response from server cycle. Call multiple times to |
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facilitate brain-dead concept of adding state to stateless protocol like |
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HTTP. |
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|
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If used with debugging level of 3 or more, it will also create dumps of |
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requests named C<< dump/nr.request >> where C<nr> is number from 0 to total number |
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of requests in single session. |
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|
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=cut |
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|
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my $dump_nr = 0; |
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|
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sub process_request { |
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my $self = shift; |
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|
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my $sock = $self->sock || die "no sock?"; |
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|
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# die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' ); |
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|
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if ( ! $sock->connected ) { |
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warn "SOCKET NOT CONNECTED\n"; |
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return 0; |
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} |
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|
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bless $sock, 'HTTP::Daemon::ClientConn'; |
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|
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# why do I have to do this? |
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# solution from http://use.perl.org/~Matts/journal/12896 |
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${*$sock}{'httpd_daemon'} = HTTP::Daemon->new; |
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|
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my $r = $sock->get_request || confess "can't get_request"; |
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my $xml = $r->content; |
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|
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my $size = length( $xml ); |
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|
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warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n"; |
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|
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$dump_nr++; |
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my $file = sprintf("dump/%04d-%s.request", $dump_nr, $sock->peerhost); |
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|
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if ( $self->debug > 2 ) { |
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write_file( $file, $r->as_string ); |
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warn "### request dumped to file: $file\n"; |
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} |
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|
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my $state; |
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|
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if ( $size > 0 ) { |
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die "no SOAPAction header in ",dump($xml) unless defined ( $r->header('SOAPAction') ); |
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|
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warn "## request payload: ",length($xml)," bytes\n$xml\n" if $self->debug; |
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$state = CWMP::Request->parse( $xml ); |
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|
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if ( defined( $state->{_dispatch} ) && $self->debug > 2 ) { |
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my $type = sprintf("dump/%04d-%s-%s", $dump_nr, $sock->peerhost, $state->{_dispatch}); |
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symlink $file, $type || warn "can't symlink $file -> $type: $!"; |
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} |
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warn "## acquired state = ", dump( $state ), "\n"; |
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|
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$self->state( $state ); |
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$self->store->update_state( ID => $state->{ID}, $state ); |
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|
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} else { |
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warn "## empty request, using last request state\n"; |
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$state = $self->state; |
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delete( $state->{_dispatch} ); |
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#warn "last request state = ", dump( $state ), "\n" if $self->debug > 1; |
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} |
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|
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|
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$sock->send(join("\r\n", |
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'HTTP/1.1 200 OK', |
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'Content-Type: text/xml; charset="utf-8"', |
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'Server: AcmeCWMP/42', |
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'SOAPServer: AcmeCWMP/42' |
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)."\r\n"); |
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|
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$sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} ); |
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|
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my $queue = CWMP::Queue->new({ |
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id => $self->store->ID_to_uid( $state->{ID}, $state ), |
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debug => $self->debug, |
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}); |
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my $job; |
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$xml = ''; |
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|
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if ( my $dispatch = $state->{_dispatch} ) { |
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$xml = $self->dispatch( $dispatch ); |
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} elsif ( $job = $queue->dequeue ) { |
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$xml = $self->dispatch( $job->dispatch ); |
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} elsif ( $size == 0 ) { |
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warn ">>> no more queued commands, closing connection\n"; |
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return 0; |
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} else { |
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warn ">>> empty response\n"; |
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$state->{NoMoreRequests} = 1; |
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$xml = $self->dispatch( 'xml', sub {} ); |
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} |
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|
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$sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" ); |
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$sock->send( $xml ) or die "can't send response"; |
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warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes\n"; |
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$job->finish if $job; |
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warn "### request over\n" if $self->debug; |
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return 1; # next request |
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}; |
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|
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=head2 dispatch |
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|
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$xml = $self->dispatch('Inform', $response_arguments ); |
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If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >> |
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=cut |
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sub dispatch { |
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my $self = shift; |
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|
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my $dispatch = shift || die "no dispatch?"; |
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my @args = @_; |
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|
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if ( ref($dispatch) eq 'ARRAY' ) { |
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my @a = @$dispatch; |
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$dispatch = shift @a; |
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push @args, @a; |
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} |
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|
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my $response = CWMP::Methods->new({ debug => $self->debug }); |
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|
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if ( $response->can( $dispatch ) ) { |
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warn ">>> dispatching to $dispatch\n"; |
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my $xml = $response->$dispatch( $self->state, @args ); |
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warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug; |
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if ( $self->debug > 2 ) { |
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my $file = sprintf("dump/%04d-%s.response", $dump_nr++, $self->sock->peerhost); |
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write_file( $file, $xml ); |
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warn "### response dump: $file\n"; |
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} |
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return $xml; |
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} else { |
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confess "can't dispatch to $dispatch"; |
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} |
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}; |
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=head2 error |
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return $self->error( 501, 'System error' ); |
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=cut |
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sub error { |
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my ($self, $number, $msg) = @_; |
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$msg ||= 'ERROR'; |
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$self->sock->send( "HTTP/1.1 $number $msg\r\n" ); |
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warn "Error - $number - $msg\n"; |
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return 0; # close connection |
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} |
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