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