scripts/RFID-JSONP-server.pl

   1 #!/usr/bin/perl
   2
   3 =head1 RFID-JSONP-server
   4
   5 This is simpliest possible JSONP server which provides local web interface to RFID readers
   6
   7 Usage:
   8
   9   ./scripts/RFID-JSONP-server.pl
  10
  11 =cut
  12
  13 use strict;
  14 use warnings;
  15
  16 use Data::Dump qw/dump/;
  17
  18 use JSON::XS;
  19 use IO::Socket::INET;
  20
  21 my $debug = 1;
  22 my $listen = '127.0.0.1:9000';
  23 my $reader;
  24
  25 use Getopt::Long;
  26
  27 GetOptions(
  28         'debug!'    => \$debug,
  29         'listen=s', => \$listen,
  30         'reader=s', => \$reader,
  31 ) || die $!;
  32
  33 use lib 'lib';
  34 use RFID::Biblio::RFID501;
  35 use RFID::Biblio::Readers;
  36 my $rfid = (RFID::Biblio::Readers->available( $reader ))[0]; # FIXME
  37 warn "using $rfid reader\n";
  38
  39 my $index_html;
  40 {
  41         local $/ = undef;
  42         $index_html = <DATA>;
  43 }
  44
  45 my $server_url;
  46
  47 sub http_server {
  48
  49         my $server = IO::Socket::INET->new(
  50                 Proto     => 'tcp',
  51                 LocalAddr => $listen,
  52                 Listen    => SOMAXCONN,
  53                 Reuse     => 1
  54         );
  55
  56         die "can't setup server: $!" unless $server;
  57
  58         $server_url = 'http://' . $listen;
  59         print "Server $0 ready at $server_url\n";
  60
  61         while (my $client = $server->accept()) {
  62                 $client->autoflush(1);
  63                 my $request = <$client>;
  64
  65                 warn "WEB << $request\n" if $debug;
  66                 my $path;
  67
  68                 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
  69                         my $method = $1;
  70                         my $param;
  71                         if ( $method =~ s{\?(.+)}{} ) {
  72                                 foreach my $p ( split(/[&;]/, $1) ) {
  73                                         my ($n,$v) = split(/=/, $p, 2);
  74                                         $param->{$n} = $v;
  75                                 }
  76                                 warn "WEB << param: ",dump( $param ) if $debug;
  77                         }
  78                         $path = $method;
  79
  80                         if ( $path eq '/' ) {
  81                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n$index_html";
  82                         } elsif ( $path =~ m{^/(examples/.+)} ) {
  83                                 $path = $1; # FIXME prefix with dir for installation
  84                                 my $size = -s $path;
  85                                 warn "static $path $size bytes\n";
  86                                 my $content_type = 'text/plain';
  87                                 $content_type = 'application/javascript' if $path =~ /\.js/;
  88                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: $content_type\r\nContent-Length: $size\r\n\r\n";
  89                                 {
  90                                         local $/ = undef;
  91                                         open(my $fh, '<', $path) || die "can't open $path: $!";
  92                                         while(<$fh>) {
  93                                                 print $client $_;
  94                                         }
  95                                         close($fh);
  96                                 }
  97                         } elsif ( $method =~ m{/scan} ) {
  98                                 my $tags = $rfid->scan;
  99                                 my $json = { time => time() };
 100                                 foreach my $tag ( keys %$tags ) {
 101                                         my $hash = RFID::Biblio::RFID501->to_hash( $tags->{$tag} );
 102                                         $hash->{sid}  = $tag;
 103                                         $hash->{security} = uc unpack 'H*', $rfid->read_afi( $tag );
 104                                         push @{ $json->{tags} }, $hash;
 105                                 };
 106                                 warn "#### ", encode_json($json);
 107                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 108                                         $param->{callback}, "(", encode_json($json), ")\r\n";
 109                         } elsif ( $method =~ m{/program} ) {
 110
 111                                 my $status = 501; # Not implementd
 112
 113                                 foreach my $p ( keys %$param ) {
 114                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 115                                         my $tag = $1;
 116                                         my $content = RFID::Biblio::RFID501->from_hash({ content => $param->{$p} });
 117                                         $content    = RFID::Biblio::RFID501->blank if $param->{$p} eq 'blank';
 118                                         $status = 302;
 119
 120                                         warn "PROGRAM $tag $content\n";
 121                                         $rfid->write_blocks( $tag => $content );
 122                                         $rfid->write_afi(    $tag => chr( $param->{$p} =~ /^130/ ? 0xDA : 0xD7 ) );
 123                                 }
 124
 125                                 print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 126
 127                         } elsif ( $method =~ m{/secure(.js)} ) {
 128
 129                                 my $json = $1;
 130
 131                                 my $status = 501; # Not implementd
 132
 133                                 foreach my $p ( keys %$param ) {
 134                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 135                                         my $tag = $1;
 136                                         my $data = $param->{$p};
 137                                         $status = 302;
 138
 139                                         warn "SECURE $tag $data\n";
 140                                         $rfid->write_afi( $tag => hex($data) );
 141                                 }
 142
 143                                 if ( $json ) {
 144                                         print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 145                                                 $param->{callback}, "({ ok: 1 })\r\n";
 146                                 } else {
 147                                         print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 148                                 }
 149
 150                         } else {
 151                                 print $client "HTTP/1.0 404 Unkown method\r\n\r\n";
 152                         }
 153                 } else {
 154                         print $client "HTTP/1.0 500 No method\r\n\r\n";
 155                 }
 156                 close $client;
 157         }
 158
 159         die "server died";
 160 }
 161
 162 http_server;
 163
 164 __DATA__
 165 <html>
 166 <head>
 167 <title>RFID JSONP</title>
 168 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 169 <style type="text/css">
 170 .status {
 171         background: #ff8;
 172 }
 173
 174 .da {
 175         background: #fcc;
 176 }
 177
 178 .d7 {
 179         background: #cfc;
 180 }
 181
 182 label[for=pull-reader] {
 183         position: absolute;
 184         top: 1em;
 185         right: 1em;
 186         background: #eee;
 187 }
 188
 189 </style>
 190 <script type="text/javascript">
 191
 192 // mock console
 193 if(!window.console) {
 194         window.console = new function() {
 195                 this.info = function(str) {};
 196                 this.debug = function(str) {};
 197         };
 198 }
 199
 200
 201 function got_visible_tags(data,textStatus) {
 202         var html = 'No tags in range';
 203         if ( data.tags ) {
 204                 html = '<ul class="tags">';
 205                 $.each(data.tags, function(i,tag) {
 206                         console.debug( i, tag );
 207                         html += '<li><tt class=' + tag.security + '>' + tag.sid;
 208                         if ( tag.content ) {
 209                                 html += ' <a href="https://koha-dev.rot13.org:8443/cgi-bin/koha/members/member.pl?member=' + tag.content + '" title="lookup in Koha" target="koha-lookup">' + tag.content + '</a>';
 210                                 html += '</tt>';
 211                                 html += '<form method=get action=program style="display:inline">'
 212                                         + '<input type=hidden name='+tag.sid+' value="blank">'
 213                                         + '<input type=submit value="Blank" onclick="return confirm(\'Blank tag '+tag.sid+'\')">'
 214                                         + '</form>'
 215                                 ;
 216                         } else {
 217                                 html += '</tt>';
 218                                 html += ' <form method=get action=program style="display:inline">'
 219                                         + '<!-- <input type=checkbox name=secure value='+tag.sid+' title="secure tag"> -->'
 220                                         + '<input type=text name='+tag.sid+' size=12>'
 221                                         + '<input type=submit value="Program">'
 222                                         + '</form>'
 223                                 ;
 224                         }
 225                 });
 226                 html += '</ul>';
 227         }
 228
 229         var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
 230
 231         html = '<div class=status>'
 232                 + textStatus
 233                 + ' &#' + arrows[ data.time % arrows.length ] + ';'
 234                 + '</div>'
 235                 + html
 236                 ;
 237         $('#tags').html( html );
 238         window.setTimeout(function(){
 239                 scan_tags();
 240         },200); // re-scan every 200ms
 241 };
 242
 243 function scan_tags() {
 244         console.info('scan_tags');
 245         if ( $('input#pull-reader').attr('checked') )
 246                 $.getJSON("/scan?callback=?", got_visible_tags);
 247 }
 248
 249 $(document).ready(function() {
 250                 $('input#pull-reader').click( function() {
 251                         scan_tags();
 252                 });
 253                 $('input#pull-reader').attr('checked', true); // force check on load
 254
 255                 $('div#tags').click( function() {
 256                         $('input#pull-reader').attr('checked', false);
 257                 } );
 258
 259                 scan_tags();
 260 });
 261 </script>
 262 </head>
 263 <body>
 264
 265 <h1>RFID tags in range</h1>
 266
 267 <label for=pull-reader>
 268 <input id=pull-reader type=checkbox checked=1>
 269 active
 270 </label>
 271
 272 <div id="tags">
 273 RFID reader not found or driver program not started.
 274 </div>
 275
 276 </body>
 277 </html>