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
  27 use lib 'lib';
  28 use RFID::Serial::Decode::RFID501;
  29 use RFID::Serial::3M810;
  30 my $rfid = RFID::Serial::3M810->new;
  31
  32 my $index_html;
  33 {
  34         local $/ = undef;
  35         $index_html = <DATA>;
  36 }
  37
  38 sub http_server {
  39
  40         my $server = IO::Socket::INET->new(
  41                 Proto     => 'tcp',
  42                 LocalPort => $listen_port,
  43                 Listen    => SOMAXCONN,
  44                 Reuse     => 1
  45         );
  46
  47         die "can't setup server: $!" unless $server;
  48
  49         print "Server $0 ready at $server_url\n";
  50
  51         while (my $client = $server->accept()) {
  52                 $client->autoflush(1);
  53                 my $request = <$client>;
  54
  55                 warn "WEB << $request\n" if $debug;
  56                 my $path;
  57
  58                 if ($request =~ m{^GET (/.*) HTTP/1.[01]}) {
  59                         my $method = $1;
  60                         my $param;
  61                         if ( $method =~ s{\?(.+)}{} ) {
  62                                 foreach my $p ( split(/[&;]/, $1) ) {
  63                                         my ($n,$v) = split(/=/, $p, 2);
  64                                         $param->{$n} = $v;
  65                                 }
  66                                 warn "WEB << param: ",dump( $param ) if $debug;
  67                         }
  68                         $path = $method;
  69
  70                         if ( $path eq '/' ) {
  71                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n$index_html";
  72                         } elsif ( $method =~ m{/scan} ) {
  73                                 my $tags = $rfid->scan;
  74                                 my $json = { time => time() };
  75                                 foreach my $tag ( keys %$tags ) {
  76                                         my $hash = RFID::Serial::Decode::RFID501->to_hash( $tags->{$tag} );
  77                                         $hash->{sid}  = $tag;
  78                                         push @{ $json->{tags} }, $hash;
  79                                 };
  80                                 warn "#### ", encode_json($json);
  81                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
  82                                         $param->{callback}, "(", encode_json($json), ")\r\n";
  83                         } elsif ( $method =~ m{/program} ) {
  84
  85                                 my $status = 501; # Not implementd
  86
  87                                 foreach my $p ( keys %$param ) {
  88                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
  89                                         my $tag = $1;
  90                                         my $content = "\x04\x11\x00\x01" . $param->{$p};
  91                                         $content = "\x00" if $param->{$p} eq 'blank';
  92                                         $status = 302;
  93
  94                                         warn "PROGRAM $tag $content\n";
  95                                         write_tag( $tag, $content );
  96                                         secure_tag_with( $tag, $param->{$p} =~ /^130/ ? 'DA' : 'D7' );
  97                                 }
  98
  99                                 print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 100
 101                         } elsif ( $method =~ m{/secure(.js)} ) {
 102
 103                                 my $json = $1;
 104
 105                                 my $status = 501; # Not implementd
 106
 107                                 foreach my $p ( keys %$param ) {
 108                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 109                                         my $tag = $1;
 110                                         my $data = $param->{$p};
 111                                         $status = 302;
 112
 113                                         warn "SECURE $tag $data\n";
 114                                         secure_tag_with( $tag, $data );
 115                                 }
 116
 117                                 if ( $json ) {
 118                                         print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 119                                                 $param->{callback}, "({ ok: 1 })\r\n";
 120                                 } else {
 121                                         print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 122                                 }
 123
 124                         } else {
 125                                 print $client "HTTP/1.0 404 Unkown method\r\n\r\n";
 126                         }
 127                 } else {
 128                         print $client "HTTP/1.0 500 No method\r\n\r\n";
 129                 }
 130                 close $client;
 131         }
 132
 133         die "server died";
 134 }
 135
 136 http_server;
 137
 138 __DATA__
 139 <html>
 140 <head>
 141 <title>RFID JSONP</title>
 142 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 143 <style type="text/css">
 144 .status {
 145         background: #ff8;
 146 }
 147
 148 .da {
 149         background: #fcc;
 150 }
 151
 152 .d7 {
 153         background: #cfc;
 154 }
 155
 156 label[for=pull-reader] {
 157         position: absolute;
 158         top: 1em;
 159         right: 1em;
 160         background: #eee;
 161 }
 162
 163 </style>
 164 <script type="text/javascript">
 165
 166 function got_visible_tags(data,textStatus) {
 167         var html = 'No tags in range';
 168         if ( data.tags ) {
 169                 html = '<ul class="tags">';
 170                 $.each(data.tags, function(i,tag) {
 171                         console.debug( i, tag );
 172                         html += '<li><tt class=' + tag.security + '>' + tag.sid;
 173                         if ( tag.content ) {
 174                                 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>';
 175                                 html += '</tt>';
 176                                 html += '<form method=get action=program style="display:inline">'
 177                                         + '<input type=hidden name='+tag.sid+' value="blank">'
 178                                         + '<input type=submit value="Blank" onclick="return confirm(\'Blank tag '+tag.sid+'\')">'
 179                                         + '</form>'
 180                                 ;
 181                         } else {
 182                                 html += '</tt>';
 183                                 html += ' <form method=get action=program style="display:inline">'
 184                                         + '<!-- <input type=checkbox name=secure value='+tag.sid+' title="secure tag"> -->'
 185                                         + '<input type=text name='+tag.sid+' size=12>'
 186                                         + '<input type=submit value="Program">'
 187                                         + '</form>'
 188                                 ;
 189                         }
 190                 });
 191                 html += '</ul>';
 192         }
 193
 194         var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
 195
 196         html = '<div class=status>'
 197                 + textStatus
 198                 + ' &#' + arrows[ data.time % arrows.length ] + ';'
 199                 + '</div>'
 200                 + html
 201                 ;
 202         $('#tags').html( html );
 203         window.setTimeout(function(){
 204                 scan_tags();
 205         },200); // re-scan every 200ms
 206 };
 207
 208 function scan_tags() {
 209         console.info('scan_tags');
 210         if ( $('input#pull-reader').attr('checked') )
 211                 $.getJSON("/scan?callback=?", got_visible_tags);
 212 }
 213
 214 $(document).ready(function() {
 215                 $('input#pull-reader').click( function() {
 216                         scan_tags();
 217                 });
 218                 $('input#pull-reader').attr('checked', true); // force check on load
 219
 220                 $('div#tags').click( function() {
 221                         $('input#pull-reader').attr('checked', false);
 222                 } );
 223
 224                 scan_tags();
 225 });
 226 </script>
 227 </head>
 228 <body>
 229
 230 <h1>RFID tags in range</h1>
 231
 232 <label for=pull-reader>
 233 <input id=pull-reader type=checkbox checked=1>
 234 active
 235 </label>
 236
 237 <div id="tags">
 238 RFID reader not found or driver program not started.
 239 </div>
 240
 241 </body>
 242 </html>