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