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                                         $hash->{security} = uc unpack 'H*', $rfid->read_afi( $tag );
  79                                         push @{ $json->{tags} }, $hash;
  80                                 };
  81                                 warn "#### ", encode_json($json);
  82                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
  83                                         $param->{callback}, "(", encode_json($json), ")\r\n";
  84                         } elsif ( $method =~ m{/program} ) {
  85
  86                                 my $status = 501; # Not implementd
  87
  88                                 foreach my $p ( keys %$param ) {
  89                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
  90                                         my $tag = $1;
  91                                         my $content = "\x04\x11\x00\x01" . $param->{$p};
  92                                         $content = "\x00" if $param->{$p} eq 'blank';
  93                                         $status = 302;
  94
  95                                         warn "PROGRAM $tag $content\n";
  96                                         write_tag( $tag, $content );
  97                                         secure_tag_with( $tag, $param->{$p} =~ /^130/ ? 'DA' : 'D7' );
  98                                 }
  99
 100                                 print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 101
 102                         } elsif ( $method =~ m{/secure(.js)} ) {
 103
 104                                 my $json = $1;
 105
 106                                 my $status = 501; # Not implementd
 107
 108                                 foreach my $p ( keys %$param ) {
 109                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 110                                         my $tag = $1;
 111                                         my $data = $param->{$p};
 112                                         $status = 302;
 113
 114                                         warn "SECURE $tag $data\n";
 115                                         secure_tag_with( $tag, $data );
 116                                 }
 117
 118                                 if ( $json ) {
 119                                         print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 120                                                 $param->{callback}, "({ ok: 1 })\r\n";
 121                                 } else {
 122                                         print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 123                                 }
 124
 125                         } else {
 126                                 print $client "HTTP/1.0 404 Unkown method\r\n\r\n";
 127                         }
 128                 } else {
 129                         print $client "HTTP/1.0 500 No method\r\n\r\n";
 130                 }
 131                 close $client;
 132         }
 133
 134         die "server died";
 135 }
 136
 137 http_server;
 138
 139 __DATA__
 140 <html>
 141 <head>
 142 <title>RFID JSONP</title>
 143 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 144 <style type="text/css">
 145 .status {
 146         background: #ff8;
 147 }
 148
 149 .da {
 150         background: #fcc;
 151 }
 152
 153 .d7 {
 154         background: #cfc;
 155 }
 156
 157 label[for=pull-reader] {
 158         position: absolute;
 159         top: 1em;
 160         right: 1em;
 161         background: #eee;
 162 }
 163
 164 </style>
 165 <script type="text/javascript">
 166
 167 // mock console
 168 if(!window.console) {
 169         window.console = new function() {
 170                 this.info = function(str) {};
 171                 this.debug = function(str) {};
 172         };
 173 }
 174
 175
 176 function got_visible_tags(data,textStatus) {
 177         var html = 'No tags in range';
 178         if ( data.tags ) {
 179                 html = '<ul class="tags">';
 180                 $.each(data.tags, function(i,tag) {
 181                         console.debug( i, tag );
 182                         html += '<li><tt class=' + tag.security + '>' + tag.sid;
 183                         if ( tag.content ) {
 184                                 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>';
 185                                 html += '</tt>';
 186                                 html += '<form method=get action=program style="display:inline">'
 187                                         + '<input type=hidden name='+tag.sid+' value="blank">'
 188                                         + '<input type=submit value="Blank" onclick="return confirm(\'Blank tag '+tag.sid+'\')">'
 189                                         + '</form>'
 190                                 ;
 191                         } else {
 192                                 html += '</tt>';
 193                                 html += ' <form method=get action=program style="display:inline">'
 194                                         + '<!-- <input type=checkbox name=secure value='+tag.sid+' title="secure tag"> -->'
 195                                         + '<input type=text name='+tag.sid+' size=12>'
 196                                         + '<input type=submit value="Program">'
 197                                         + '</form>'
 198                                 ;
 199                         }
 200                 });
 201                 html += '</ul>';
 202         }
 203
 204         var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
 205
 206         html = '<div class=status>'
 207                 + textStatus
 208                 + ' &#' + arrows[ data.time % arrows.length ] + ';'
 209                 + '</div>'
 210                 + html
 211                 ;
 212         $('#tags').html( html );
 213         window.setTimeout(function(){
 214                 scan_tags();
 215         },200); // re-scan every 200ms
 216 };
 217
 218 function scan_tags() {
 219         console.info('scan_tags');
 220         if ( $('input#pull-reader').attr('checked') )
 221                 $.getJSON("/scan?callback=?", got_visible_tags);
 222 }
 223
 224 $(document).ready(function() {
 225                 $('input#pull-reader').click( function() {
 226                         scan_tags();
 227                 });
 228                 $('input#pull-reader').attr('checked', true); // force check on load
 229
 230                 $('div#tags').click( function() {
 231                         $('input#pull-reader').attr('checked', false);
 232                 } );
 233
 234                 scan_tags();
 235 });
 236 </script>
 237 </head>
 238 <body>
 239
 240 <h1>RFID tags in range</h1>
 241
 242 <label for=pull-reader>
 243 <input id=pull-reader type=checkbox checked=1>
 244 active
 245 </label>
 246
 247 <div id="tags">
 248 RFID reader not found or driver program not started.
 249 </div>
 250
 251 </body>
 252 </html>