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
  23 my $listen_port = 9000;                  # pick something not in use
  24 my $server_url  = "http://localhost:$listen_port";
  25
  26 my $reader = shift @ARGV;
  27
  28 use lib 'lib';
  29 use RFID::Biblio::RFID501;
  30 use RFID::Biblio::Readers;
  31 my $rfid = (RFID::Biblio::Readers->available( $reader ))[0]; # FIXME
  32
  33 my $index_html;
  34 {
  35         local $/ = undef;
  36         $index_html = <DATA>;
  37 }
  38
  39 sub http_server {
  40
  41         my $server = IO::Socket::INET->new(
  42                 Proto     => 'tcp',
  43                 LocalPort => $listen_port,
  44                 Listen    => SOMAXCONN,
  45                 Reuse     => 1
  46         );
  47
  48         die "can't setup server: $!" unless $server;
  49
  50         print "Server $0 ready at $server_url\n";
  51
  52         while (my $client = $server->accept()) {
  53                 $client->autoflush(1);
  54                 my $request = <$client>;
  55
  56                 warn "WEB << $request\n" if $debug;
  57                 my $path;
  58
  59                 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
  60                         my $method = $1;
  61                         my $param;
  62                         if ( $method =~ s{\?(.+)}{} ) {
  63                                 foreach my $p ( split(/[&;]/, $1) ) {
  64                                         my ($n,$v) = split(/=/, $p, 2);
  65                                         $param->{$n} = $v;
  66                                 }
  67                                 warn "WEB << param: ",dump( $param ) if $debug;
  68                         }
  69                         $path = $method;
  70
  71                         if ( $path eq '/' ) {
  72                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n$index_html";
  73                         } elsif ( $method =~ m{/scan} ) {
  74                                 my $tags = $rfid->scan;
  75                                 my $json = { time => time() };
  76                                 foreach my $tag ( keys %$tags ) {
  77                                         my $hash = RFID::Biblio::RFID501->to_hash( $tags->{$tag} );
  78                                         $hash->{sid}  = $tag;
  79                                         $hash->{security} = uc unpack 'H*', $rfid->read_afi( $tag );
  80                                         push @{ $json->{tags} }, $hash;
  81                                 };
  82                                 warn "#### ", encode_json($json);
  83                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
  84                                         $param->{callback}, "(", encode_json($json), ")\r\n";
  85                         } elsif ( $method =~ m{/program} ) {
  86
  87                                 my $status = 501; # Not implementd
  88
  89                                 foreach my $p ( keys %$param ) {
  90                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
  91                                         my $tag = $1;
  92                                         my $content = "\x04\x11\x00\x01" . $param->{$p};
  93                                         $content = "\x00" if $param->{$p} eq 'blank';
  94                                         $status = 302;
  95
  96                                         warn "PROGRAM $tag $content\n";
  97                                         write_tag( $tag, $content );
  98                                         secure_tag_with( $tag, $param->{$p} =~ /^130/ ? 'DA' : 'D7' );
  99                                 }
 100
 101                                 print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 102
 103                         } elsif ( $method =~ m{/secure(.js)} ) {
 104
 105                                 my $json = $1;
 106
 107                                 my $status = 501; # Not implementd
 108
 109                                 foreach my $p ( keys %$param ) {
 110                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 111                                         my $tag = $1;
 112                                         my $data = $param->{$p};
 113                                         $status = 302;
 114
 115                                         warn "SECURE $tag $data\n";
 116                                         secure_tag_with( $tag, $data );
 117                                 }
 118
 119                                 if ( $json ) {
 120                                         print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 121                                                 $param->{callback}, "({ ok: 1 })\r\n";
 122                                 } else {
 123                                         print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 124                                 }
 125
 126                         } else {
 127                                 print $client "HTTP/1.0 404 Unkown method\r\n\r\n";
 128                         }
 129                 } else {
 130                         print $client "HTTP/1.0 500 No method\r\n\r\n";
 131                 }
 132                 close $client;
 133         }
 134
 135         die "server died";
 136 }
 137
 138 http_server;
 139
 140 __DATA__
 141 <html>
 142 <head>
 143 <title>RFID JSONP</title>
 144 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 145 <style type="text/css">
 146 .status {
 147         background: #ff8;
 148 }
 149
 150 .da {
 151         background: #fcc;
 152 }
 153
 154 .d7 {
 155         background: #cfc;
 156 }
 157
 158 label[for=pull-reader] {
 159         position: absolute;
 160         top: 1em;
 161         right: 1em;
 162         background: #eee;
 163 }
 164
 165 </style>
 166 <script type="text/javascript">
 167
 168 // mock console
 169 if(!window.console) {
 170         window.console = new function() {
 171                 this.info = function(str) {};
 172                 this.debug = function(str) {};
 173         };
 174 }
 175
 176
 177 function got_visible_tags(data,textStatus) {
 178         var html = 'No tags in range';
 179         if ( data.tags ) {
 180                 html = '<ul class="tags">';
 181                 $.each(data.tags, function(i,tag) {
 182                         console.debug( i, tag );
 183                         html += '<li><tt class=' + tag.security + '>' + tag.sid;
 184                         if ( tag.content ) {
 185                                 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>';
 186                                 html += '</tt>';
 187                                 html += '<form method=get action=program style="display:inline">'
 188                                         + '<input type=hidden name='+tag.sid+' value="blank">'
 189                                         + '<input type=submit value="Blank" onclick="return confirm(\'Blank tag '+tag.sid+'\')">'
 190                                         + '</form>'
 191                                 ;
 192                         } else {
 193                                 html += '</tt>';
 194                                 html += ' <form method=get action=program style="display:inline">'
 195                                         + '<!-- <input type=checkbox name=secure value='+tag.sid+' title="secure tag"> -->'
 196                                         + '<input type=text name='+tag.sid+' size=12>'
 197                                         + '<input type=submit value="Program">'
 198                                         + '</form>'
 199                                 ;
 200                         }
 201                 });
 202                 html += '</ul>';
 203         }
 204
 205         var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
 206
 207         html = '<div class=status>'
 208                 + textStatus
 209                 + ' &#' + arrows[ data.time % arrows.length ] + ';'
 210                 + '</div>'
 211                 + html
 212                 ;
 213         $('#tags').html( html );
 214         window.setTimeout(function(){
 215                 scan_tags();
 216         },200); // re-scan every 200ms
 217 };
 218
 219 function scan_tags() {
 220         console.info('scan_tags');
 221         if ( $('input#pull-reader').attr('checked') )
 222                 $.getJSON("/scan?callback=?", got_visible_tags);
 223 }
 224
 225 $(document).ready(function() {
 226                 $('input#pull-reader').click( function() {
 227                         scan_tags();
 228                 });
 229                 $('input#pull-reader').attr('checked', true); // force check on load
 230
 231                 $('div#tags').click( function() {
 232                         $('input#pull-reader').attr('checked', false);
 233                 } );
 234
 235                 scan_tags();
 236 });
 237 </script>
 238 </head>
 239 <body>
 240
 241 <h1>RFID tags in range</h1>
 242
 243 <label for=pull-reader>
 244 <input id=pull-reader type=checkbox checked=1>
 245 active
 246 </label>
 247
 248 <div id="tags">
 249 RFID reader not found or driver program not started.
 250 </div>
 251
 252 </body>
 253 </html>