lib/CWMP/Session.pm

# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST
package CWMP::Server;

use strict;
use warnings;

use base qw/Class::Accessor/;
__PACKAGE__->mk_accessors( qw/
debug
port
/ );

use IO::Socket::INET;
use Data::Dump qw/dump/;
use CWMP::Request;
use CWMP::Response;
use Carp qw/confess cluck/;

=head1 NAME

CWMP::Server - implement logic of CWMP protocol

=head1 METHODS

=head2 new

  my $server = CWMP::Server->new({ port => 3333 });

=head2 run

  $server->run();

=cut

sub run {
        my $self = shift;

        my $listen = IO::Socket::INET->new(
                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->process_request( $sock );

                warn "...another one bites a dust...\n";
                sleep 1;
        }
}

sub process_request {
        my $self = shift;

        my $sock = shift || die "no sock?";

        die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' );

        $sock->autoflush( 1 );
        $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
        $self->read_headers($sock) || return $self->error(400, "Strange headers");

        ### do we support the type
#       if ($method !~ /GET|POST|HEAD/) {
        if ($method !~ /POST/) {
                return $self->error(400, "Unsupported Method");
        }

    my $chunk;
        my $transfer_encoding = $self->header('Transfer-Encoding');

        if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {

                my $len = 0;

                do {

                        warn "get chunk len\n" if $self->debug;
                        
                        my $hex;
                        do {
                                $hex = $sock->getline;
                                $hex =~ s/[\n\r]+$//;
                        } until ( $hex ne '' );

                        die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);
                        $len = hex( $hex );

                        warn "getting chunk of $len bytes\n" if $self->debug;

                        $sock->read( my $buff, $len );
                        $chunk .= $buff;

                        warn "--- $len bytes: --=>||$buff||<=--\n";

                } while ( $len > 0 );

        } else {
                die "right now, we support only Transfer-Encoding: chunked";
        }

        warn "handler got ", length($chunk), " bytes\n" if $self->debug;

        warn "<<< " . localtime() . " " . $sock->peerhost . "\n";

        die "not SOAP request" unless defined ( $self->header('SOAPAction') );

        my $state;

        if ( $chunk ) {
                warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;

                $state = CWMP::Request->parse( $chunk );

                warn "acquired state = ", dump( $state ), "\n";
        
        } else {
                warn "empty request\n";
        }


        my $response = CWMP::Response->new({ debug => $self->debug });

        print $self->status(200), $self->content_type('text/xml; charset="utf-8"'), "\r\n";

        print "Server: AcmeCWMP/42\r\nSOAPServer: AcmeCWMP/42\r\n";

        print "Set-Cookie: ID=" , $state->{ID}, "; path=/\r\n" if ( $state->{ID} );
        
        my $xml = '';

        if ( my $dispatch = $state->{_dispatch} ) {
                if ( $response->can( $dispatch ) ) {
                        warn ">>> dispatching to $dispatch\n";
                        $xml = $response->$dispatch( $state ) . "\r\n";
                        warn "## response payload: ",length($xml)," bytes\n$xml\n";
                } else {
                        confess "can't dispatch to $dispatch";
                }
        } else {
                warn ">>> empty response\n";
        }

        print "Content-length: ", length( $xml ), "\r\n\r\n";
        print $xml or die "can't send response";

        warn "### request over";

};


sub read_headers {
  my $self = shift;

        my $sock = shift || die "no sock?";

  $self->{headers} = {};

  while (defined($_ = $sock->getline)) {
    s/[\r\n]+$//;
    last unless length $_;
        warn "-- $_\n";
    return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;
    $self->{headers}->{$1} = $2;
  }

  return 1;
}

sub header {
        my $self = shift;
        my $header = shift || die "no header?";
        if ( defined( $self->{headers}->{$header} )) {
                return $self->{headers}->{$header};
        } else {
                return;
        }
}

sub content_type {
  my ($self, $type) = @_;
  $self->http_header;
  return "Content-type: $type\r\n";
}

sub error{
  my ($self, $number, $msg) = @_;
  print $self->status($number, $msg), "\r\n";
  warn "Error - $number - $msg\n";
}

sub status {
  my ($self, $number, $msg) = @_;
  $msg = '' if ! defined $msg;
  return if $self->http_header($number);
  return "Status $number: $msg\r\n";
}

sub http_header {
  my $self = shift;
  my $number = shift || 200;
  return if ! delete $self->{needs_header};
  print "HTTP/1.0 $number\r\n";
  return 1;
}

1;
1	dpavlin	30	# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST
2			package CWMP::Server;
3
4			use strict;
5			use warnings;
6
7	dpavlin	40	use base qw/Class::Accessor/;
8	dpavlin	30	__PACKAGE__->mk_accessors( qw/
9			debug
10	dpavlin	40	port
11	dpavlin	30	/ );
12
13	dpavlin	40	use IO::Socket::INET;
14	dpavlin	30	use Data::Dump qw/dump/;
15	dpavlin	35	use CWMP::Request;
16			use CWMP::Response;
17	dpavlin	40	use Carp qw/confess cluck/;
18	dpavlin	30
19	dpavlin	34	=head1 NAME
20
21			CWMP::Server - implement logic of CWMP protocol
22
23			=head1 METHODS
24
25	dpavlin	40	=head2 new
26	dpavlin	34
27	dpavlin	40	my $server = CWMP::Server->new({ port => 3333 });
28	dpavlin	34
29	dpavlin	40	=head2 run
30
31			$server->run();
32
33	dpavlin	34	=cut
34
35	dpavlin	40	sub run {
36			my $self = shift;
37	dpavlin	30
38	dpavlin	40	my $listen = IO::Socket::INET->new(
39			Listen => 5,
40			# LocalAddr => 'localhost',
41			LocalPort => $self->port,
42			Proto => 'tcp',
43			Blocking => 1,
44			ReuseAddr => 1,
45			);
46
47			warn "waiting for request on port ", $self->port, $/;
48
49			while ( my $sock = $listen->accept ) {
50			$sock->autoflush(1);
51
52			warn "connection from ", $sock->peerhost, "\n";
53
54			$self->process_request( $sock );
55
56			warn "...another one bites a dust...\n";
57			sleep 1;
58			}
59			}
60
61			sub process_request {
62			my $self = shift;
63
64			my $sock = shift \|\| die "no sock?";
65
66			die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' );
67
68			$sock->autoflush( 1 );
69			$sock->blocking( 1 );
70
71			### read the first line of response
72			my $line = $sock->getline; # \|\| $self->error(400, "No Data");
73
74			$line =~ s/[\r\n]+$//;
75			if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) {
76			return $self->error(400, "Bad request");
77			}
78			my ($method, $req, $protocol) = ($1, $2, $3);
79			warn "<<<< ",join(" ", time, $method, $req)."\n";
80
81			### read in other headers
82			$self->read_headers($sock) \|\| return $self->error(400, "Strange headers");
83
84			### do we support the type
85			# if ($method !~ /GET\|POST\|HEAD/) {
86			if ($method !~ /POST/) {
87			return $self->error(400, "Unsupported Method");
88			}
89
90	dpavlin	30	my $chunk;
91			my $transfer_encoding = $self->header('Transfer-Encoding');
92
93			if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {
94
95	dpavlin	31	my $len = 0;
96	dpavlin	40
97	dpavlin	30	do {
98
99	dpavlin	40	warn "get chunk len\n" if $self->debug;
100
101			my $hex;
102			do {
103			$hex = $sock->getline;
104			$hex =~ s/[\n\r]+$//;
105			} until ( $hex ne '' );
106	dpavlin	30
107	dpavlin	40	die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);
108			$len = hex( $hex );
109	dpavlin	30
110	dpavlin	40	warn "getting chunk of $len bytes\n" if $self->debug;
111	dpavlin	30
112	dpavlin	40	$sock->read( my $buff, $len );
113			$chunk .= $buff;
114	dpavlin	30
115	dpavlin	40	warn "--- $len bytes: --=>\|\|$buff\|\|<=--\n";
116	dpavlin	30
117	dpavlin	40	} while ( $len > 0 );
118	dpavlin	30
119	dpavlin	40	} else {
120			die "right now, we support only Transfer-Encoding: chunked";
121			}
122	dpavlin	34
123	dpavlin	40	warn "handler got ", length($chunk), " bytes\n" if $self->debug;
124	dpavlin	34
125	dpavlin	40	warn "<<< " . localtime() . " " . $sock->peerhost . "\n";
126	dpavlin	34
127	dpavlin	40	die "not SOAP request" unless defined ( $self->header('SOAPAction') );
128	dpavlin	30
129	dpavlin	36	my $state;
130
131	dpavlin	40	if ( $chunk ) {
132			warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;
133	dpavlin	30
134	dpavlin	40	$state = CWMP::Request->parse( $chunk );
135	dpavlin	34
136	dpavlin	40	warn "acquired state = ", dump( $state ), "\n";
137	dpavlin	34
138	dpavlin	36	} else {
139			warn "empty request\n";
140	dpavlin	34	}
141
142	dpavlin	40
143	dpavlin	35	my $response = CWMP::Response->new({ debug => $self->debug });
144	dpavlin	34
145	dpavlin	40	print $self->status(200), $self->content_type('text/xml; charset="utf-8"'), "\r\n";
146	dpavlin	30
147	dpavlin	40	print "Server: AcmeCWMP/42\r\nSOAPServer: AcmeCWMP/42\r\n";
148
149			print "Set-Cookie: ID=" , $state->{ID}, "; path=/\r\n" if ( $state->{ID} );
150
151			my $xml = '';
152
153	dpavlin	36	if ( my $dispatch = $state->{_dispatch} ) {
154			if ( $response->can( $dispatch ) ) {
155			warn ">>> dispatching to $dispatch\n";
156	dpavlin	40	$xml = $response->$dispatch( $state ) . "\r\n";
157			warn "## response payload: ",length($xml)," bytes\n$xml\n";
158	dpavlin	36	} else {
159			confess "can't dispatch to $dispatch";
160			}
161			} else {
162			warn ">>> empty response\n";
163			}
164	dpavlin	40
165			print "Content-length: ", length( $xml ), "\r\n\r\n";
166			print $xml or die "can't send response";
167
168			warn "### request over";
169
170	dpavlin	30	};
171
172	dpavlin	40
173			sub read_headers {
174			my $self = shift;
175
176			my $sock = shift \|\| die "no sock?";
177
178			$self->{headers} = {};
179
180			while (defined($_ = $sock->getline)) {
181			s/[\r\n]+$//;
182			last unless length $_;
183			warn "-- $_\n";
184			return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;
185			$self->{headers}->{$1} = $2;
186			}
187
188			return 1;
189			}
190
191			sub header {
192			my $self = shift;
193			my $header = shift \|\| die "no header?";
194			if ( defined( $self->{headers}->{$header} )) {
195			return $self->{headers}->{$header};
196			} else {
197			return;
198			}
199			}
200
201			sub content_type {
202			my ($self, $type) = @_;
203			$self->http_header;
204			return "Content-type: $type\r\n";
205			}
206
207			sub error{
208			my ($self, $number, $msg) = @_;
209			print $self->status($number, $msg), "\r\n";
210			warn "Error - $number - $msg\n";
211			}
212
213			sub status {
214			my ($self, $number, $msg) = @_;
215			$msg = '' if ! defined $msg;
216			return if $self->http_header($number);
217			return "Status $number: $msg\r\n";
218			}
219
220			sub http_header {
221			my $self = shift;
222			my $number = shift \|\| 200;
223			return if ! delete $self->{needs_header};
224			print "HTTP/1.0 $number\r\n";
225			return 1;
226			}
227
228	dpavlin	30	1;