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 ( $path =~ m{^/(examples/.+)} ) {
  74                                 $path = $1; # FIXME prefix with dir for installation
  75                                 my $size = -s $path;
  76                                 warn "static $path $size bytes\n";
  77                                 my $content_type = 'text/plain';
  78                                 $content_type = 'application/javascript' if $path =~ /\.js/;
  79                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: $content_type\r\nContent-Length: $size\r\n\r\n";
  80                                 {
  81                                         local $/ = undef;
  82                                         open(my $fh, '<', $path) || die "can't open $path: $!";
  83                                         while(<$fh>) {
  84                                                 print $client $_;
  85                                         }
  86                                         close($fh);
  87                                 }
  88                         } elsif ( $method =~ m{/scan} ) {
  89                                 my $tags = $rfid->scan;
  90                                 my $json = { time => time() };
  91                                 foreach my $tag ( keys %$tags ) {
  92                                         my $hash = RFID::Biblio::RFID501->to_hash( $tags->{$tag} );
  93                                         $hash->{sid}  = $tag;
  94                                         $hash->{security} = uc unpack 'H*', $rfid->read_afi( $tag );
  95                                         push @{ $json->{tags} }, $hash;
  96                                 };
  97                                 warn "#### ", encode_json($json);
  98                                 print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
  99                                         $param->{callback}, "(", encode_json($json), ")\r\n";
 100                         } elsif ( $method =~ m{/program} ) {
 101
 102                                 my $status = 501; # Not implementd
 103
 104                                 foreach my $p ( keys %$param ) {
 105                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 106                                         my $tag = $1;
 107                                         my $content = RFID::Biblio::RFID501->from_hash({ content => $param->{$p} });
 108                                         $content    = RFID::Biblio::RFID501->blank if $param->{$p} eq 'blank';
 109                                         $status = 302;
 110
 111                                         warn "PROGRAM $tag $content\n";
 112                                         $rfid->write_blocks( $tag => $content );
 113                                         $rfid->write_afi(    $tag => chr( $param->{$p} =~ /^130/ ? 0xDA : 0xD7 ) );
 114                                 }
 115
 116                                 print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 117
 118                         } elsif ( $method =~ m{/secure(.js)} ) {
 119
 120                                 my $json = $1;
 121
 122                                 my $status = 501; # Not implementd
 123
 124                                 foreach my $p ( keys %$param ) {
 125                                         next unless $p =~ m/^(E[0-9A-F]{15})$/;
 126                                         my $tag = $1;
 127                                         my $data = $param->{$p};
 128                                         $status = 302;
 129
 130                                         warn "SECURE $tag $data\n";
 131                                         secure_tag_with( $tag, $data );
 132                                 }
 133
 134                                 if ( $json ) {
 135                                         print $client "HTTP/1.0 200 OK\r\nContent-Type: application/json\r\n\r\n",
 136                                                 $param->{callback}, "({ ok: 1 })\r\n";
 137                                 } else {
 138                                         print $client "HTTP/1.0 $status $method\r\nLocation: $server_url\r\n\r\n";
 139                                 }
 140
 141                         } else {
 142                                 print $client "HTTP/1.0 404 Unkown method\r\n\r\n";
 143                         }
 144                 } else {
 145                         print $client "HTTP/1.0 500 No method\r\n\r\n";
 146                 }
 147                 close $client;
 148         }
 149
 150         die "server died";
 151 }
 152
 153 http_server;
 154
 155 __DATA__
 156 <html>
 157 <head>
 158 <title>RFID JSONP</title>
 159 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 160 <style type="text/css">
 161 .status {
 162         background: #ff8;
 163 }
 164
 165 .da {
 166         background: #fcc;
 167 }
 168
 169 .d7 {
 170         background: #cfc;
 171 }
 172
 173 label[for=pull-reader] {
 174         position: absolute;
 175         top: 1em;
 176         right: 1em;
 177         background: #eee;
 178 }
 179
 180 </style>
 181 <script type="text/javascript">
 182
 183 // mock console
 184 if(!window.console) {
 185         window.console = new function() {
 186                 this.info = function(str) {};
 187                 this.debug = function(str) {};
 188         };
 189 }
 190
 191
 192 function got_visible_tags(data,textStatus) {
 193         var html = 'No tags in range';
 194         if ( data.tags ) {
 195                 html = '<ul class="tags">';
 196                 $.each(data.tags, function(i,tag) {
 197                         console.debug( i, tag );
 198                         html += '<li><tt class=' + tag.security + '>' + tag.sid;
 199                         if ( tag.content ) {
 200                                 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>';
 201                                 html += '</tt>';
 202                                 html += '<form method=get action=program style="display:inline">'
 203                                         + '<input type=hidden name='+tag.sid+' value="blank">'
 204                                         + '<input type=submit value="Blank" onclick="return confirm(\'Blank tag '+tag.sid+'\')">'
 205                                         + '</form>'
 206                                 ;
 207                         } else {
 208                                 html += '</tt>';
 209                                 html += ' <form method=get action=program style="display:inline">'
 210                                         + '<!-- <input type=checkbox name=secure value='+tag.sid+' title="secure tag"> -->'
 211                                         + '<input type=text name='+tag.sid+' size=12>'
 212                                         + '<input type=submit value="Program">'
 213                                         + '</form>'
 214                                 ;
 215                         }
 216                 });
 217                 html += '</ul>';
 218         }
 219
 220         var arrows = Array( 8592, 8598, 8593, 8599, 8594, 8600, 8595, 8601 );
 221
 222         html = '<div class=status>'
 223                 + textStatus
 224                 + ' &#' + arrows[ data.time % arrows.length ] + ';'
 225                 + '</div>'
 226                 + html
 227                 ;
 228         $('#tags').html( html );
 229         window.setTimeout(function(){
 230                 scan_tags();
 231         },200); // re-scan every 200ms
 232 };
 233
 234 function scan_tags() {
 235         console.info('scan_tags');
 236         if ( $('input#pull-reader').attr('checked') )
 237                 $.getJSON("/scan?callback=?", got_visible_tags);
 238 }
 239
 240 $(document).ready(function() {
 241                 $('input#pull-reader').click( function() {
 242                         scan_tags();
 243                 });
 244                 $('input#pull-reader').attr('checked', true); // force check on load
 245
 246                 $('div#tags').click( function() {
 247                         $('input#pull-reader').attr('checked', false);
 248                 } );
 249
 250                 scan_tags();
 251 });
 252 </script>
 253 </head>
 254 <body>
 255
 256 <h1>RFID tags in range</h1>
 257
 258 <label for=pull-reader>
 259 <input id=pull-reader type=checkbox checked=1>
 260 active
 261 </label>
 262
 263 <div id="tags">
 264 RFID reader not found or driver program not started.
 265 </div>
 266
 267 </body>
 268 </html>