| 1 |
# 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 |
use base qw/Class::Accessor/; |
| 8 |
__PACKAGE__->mk_accessors( qw/ |
| 9 |
debug |
| 10 |
port |
| 11 |
sock |
| 12 |
state |
| 13 |
/ ); |
| 14 |
|
| 15 |
use IO::Socket::INET; |
| 16 |
use Data::Dump qw/dump/; |
| 17 |
use CWMP::Request; |
| 18 |
use CWMP::Response; |
| 19 |
use Carp qw/confess cluck/; |
| 20 |
|
| 21 |
=head1 NAME |
| 22 |
|
| 23 |
CWMP::Server - implement logic of CWMP protocol |
| 24 |
|
| 25 |
=head1 METHODS |
| 26 |
|
| 27 |
=head2 new |
| 28 |
|
| 29 |
my $server = CWMP::Server->new({ port => 3333 }); |
| 30 |
|
| 31 |
=head2 run |
| 32 |
|
| 33 |
$server->run(); |
| 34 |
|
| 35 |
=cut |
| 36 |
|
| 37 |
sub run { |
| 38 |
my $self = shift; |
| 39 |
|
| 40 |
my $listen = IO::Socket::INET->new( |
| 41 |
Listen => 5, |
| 42 |
# LocalAddr => 'localhost', |
| 43 |
LocalPort => $self->port, |
| 44 |
Proto => 'tcp', |
| 45 |
Blocking => 1, |
| 46 |
ReuseAddr => 1, |
| 47 |
); |
| 48 |
|
| 49 |
warn "waiting for request on port ", $self->port, $/; |
| 50 |
|
| 51 |
while ( my $sock = $listen->accept ) { |
| 52 |
$sock->autoflush(1); |
| 53 |
|
| 54 |
warn "connection from ", $sock->peerhost, "\n"; |
| 55 |
|
| 56 |
$self->sock( $sock ); # FIXME this will not work for multiple clients |
| 57 |
while ( $self->process_request ) { |
| 58 |
warn "...another one bites a dust...\n"; |
| 59 |
} |
| 60 |
|
| 61 |
warn "...returning to accepting new connections\n"; |
| 62 |
} |
| 63 |
} |
| 64 |
|
| 65 |
=head2 process_request |
| 66 |
|
| 67 |
One request from client/response from server cycle. Call multiple times to |
| 68 |
facilitate brain-dead concept of adding state to stateless protocol like |
| 69 |
HTTP. |
| 70 |
|
| 71 |
=cut |
| 72 |
|
| 73 |
sub process_request { |
| 74 |
my $self = shift; |
| 75 |
|
| 76 |
my $sock = $self->sock || die "no sock?"; |
| 77 |
|
| 78 |
die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' ); |
| 79 |
|
| 80 |
if ( ! $sock->connected ) { |
| 81 |
warn "SOCKET NOT CONNECTED"; |
| 82 |
return 0; |
| 83 |
} |
| 84 |
|
| 85 |
$sock->autoflush( 1 ); |
| 86 |
$sock->blocking( 1 ); |
| 87 |
|
| 88 |
### read the first line of response |
| 89 |
my $line = $sock->getline; |
| 90 |
return $self->error(400, "No Data") unless ( defined $line ); |
| 91 |
|
| 92 |
$line =~ s/[\r\n]+$//; |
| 93 |
if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) { |
| 94 |
warn "ERROR: $line\n"; |
| 95 |
return $self->error(400, "Bad request"); |
| 96 |
} |
| 97 |
my ($method, $req, $protocol) = ($1, $2, $3); |
| 98 |
warn "<<<< ", $sock->peerhost, " - - [" . localtime() . "] \"$method $req $protocol\"\n"; |
| 99 |
|
| 100 |
### read in other headers |
| 101 |
$self->read_headers || return $self->error(400, "Strange headers"); |
| 102 |
|
| 103 |
### do we support the type |
| 104 |
# if ($method !~ /GET|POST|HEAD/) { |
| 105 |
if ($method !~ /POST/) { |
| 106 |
return $self->error(400, "Unsupported Method"); |
| 107 |
} |
| 108 |
|
| 109 |
my $chunk; |
| 110 |
my $transfer_encoding = $self->header('Transfer-Encoding'); |
| 111 |
|
| 112 |
if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) { |
| 113 |
|
| 114 |
my $len = 0; |
| 115 |
|
| 116 |
do { |
| 117 |
|
| 118 |
warn "get chunk len\n" if $self->debug; |
| 119 |
|
| 120 |
my $hex; |
| 121 |
do { |
| 122 |
$hex = $sock->getline; |
| 123 |
$hex =~ s/[\n\r]+$//; |
| 124 |
} until ( $hex ne '' ); |
| 125 |
|
| 126 |
die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i); |
| 127 |
$len = hex( $hex ); |
| 128 |
|
| 129 |
warn "getting chunk of $len bytes\n" if $self->debug; |
| 130 |
|
| 131 |
$sock->read( my $buff, $len ); |
| 132 |
$chunk .= $buff; |
| 133 |
|
| 134 |
warn "--- $len bytes: --=>||$buff||<=--\n"; |
| 135 |
|
| 136 |
} while ( $len > 0 ); |
| 137 |
my $sep = $sock->getline; |
| 138 |
die "expected separator, not ", dump( $sep ) if ( $sep !~ m/^[\n\r]+$/ ); |
| 139 |
|
| 140 |
} else { |
| 141 |
die "right now, we support only Transfer-Encoding: chunked"; |
| 142 |
} |
| 143 |
|
| 144 |
my $size = length( $chunk ); |
| 145 |
|
| 146 |
warn "<<< " . $sock->peerhost . " [" . localtime() . "] request $size bytes\n"; |
| 147 |
|
| 148 |
my $state; |
| 149 |
|
| 150 |
if ( $size > 0 ) { |
| 151 |
|
| 152 |
die "no SOAPAction header in ",dump($chunk) unless defined ( $self->header('SOAPAction') ); |
| 153 |
|
| 154 |
|
| 155 |
if ( $chunk ) { |
| 156 |
warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug; |
| 157 |
|
| 158 |
$state = CWMP::Request->parse( $chunk ); |
| 159 |
|
| 160 |
warn "acquired state = ", dump( $state ), "\n"; |
| 161 |
|
| 162 |
$self->state( $state ); |
| 163 |
|
| 164 |
} else { |
| 165 |
warn "empty request\n"; |
| 166 |
} |
| 167 |
|
| 168 |
} else { |
| 169 |
$state = $self->state; |
| 170 |
warn "last request state = ", dump( $state ), "\n"; |
| 171 |
} |
| 172 |
|
| 173 |
my $response = CWMP::Response->new({ debug => $self->debug }); |
| 174 |
|
| 175 |
$sock->send(join("\r\n", |
| 176 |
'HTTP/1.1 200 OK', |
| 177 |
'Content-Type: text/xml; charset="utf-8"', |
| 178 |
'Server: AcmeCWMP/42', |
| 179 |
'SOAPServer: AcmeCWMP/42' |
| 180 |
)); |
| 181 |
|
| 182 |
$sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} ); |
| 183 |
|
| 184 |
my $xml = ''; |
| 185 |
|
| 186 |
if ( my $dispatch = $state->{_dispatch} ) { |
| 187 |
if ( $response->can( $dispatch ) ) { |
| 188 |
warn ">>> dispatching to $dispatch\n"; |
| 189 |
$xml = $response->$dispatch( $state ) . "\r\n"; |
| 190 |
warn "## response payload: ",length($xml)," bytes\n$xml\n"; |
| 191 |
} else { |
| 192 |
confess "can't dispatch to $dispatch"; |
| 193 |
} |
| 194 |
} else { |
| 195 |
warn ">>> empty response\n"; |
| 196 |
} |
| 197 |
|
| 198 |
$sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" ); |
| 199 |
$sock->send( $xml ) or die "can't send response"; |
| 200 |
|
| 201 |
warn "### request over"; |
| 202 |
|
| 203 |
}; |
| 204 |
|
| 205 |
=head2 read_headers |
| 206 |
|
| 207 |
parse headers from request |
| 208 |
|
| 209 |
=cut |
| 210 |
|
| 211 |
sub read_headers { |
| 212 |
my $self = shift; |
| 213 |
|
| 214 |
$self->{headers} = {}; |
| 215 |
|
| 216 |
while (defined($_ = $self->sock->getline)) { |
| 217 |
s/[\r\n]+$//; |
| 218 |
last unless length $_; |
| 219 |
warn "-- $_\n"; |
| 220 |
return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x; |
| 221 |
$self->{headers}->{$1} = $2; |
| 222 |
} |
| 223 |
|
| 224 |
return 1; |
| 225 |
} |
| 226 |
|
| 227 |
=head2 header |
| 228 |
|
| 229 |
Getter for specific header |
| 230 |
|
| 231 |
$self->header('Cookies'); |
| 232 |
|
| 233 |
=cut |
| 234 |
|
| 235 |
sub header { |
| 236 |
my $self = shift; |
| 237 |
my $header = shift || die "no header?"; |
| 238 |
if ( defined( $self->{headers}->{$header} )) { |
| 239 |
return $self->{headers}->{$header}; |
| 240 |
} else { |
| 241 |
return; |
| 242 |
} |
| 243 |
} |
| 244 |
|
| 245 |
=head2 error |
| 246 |
|
| 247 |
return $self->error( 501, 'System error' ); |
| 248 |
|
| 249 |
=cut |
| 250 |
|
| 251 |
sub error { |
| 252 |
my ($self, $number, $msg) = @_; |
| 253 |
$msg ||= 'ERROR'; |
| 254 |
$self->sock->send( "HTTP/1.1 $number $msg\r\n" ); |
| 255 |
warn "Error - $number - $msg\n"; |
| 256 |
return 0; # close connection |
| 257 |
} |
| 258 |
|
| 259 |
1; |
Parent Directory
| 
Revision Log