doc/index.php

   1 <?php
   2 # Content-type negotiation for LV2 specification bundles
   3
   4 $rdfxml      = accepts("application\/rdf\+xml");
   5 $turtle      = accepts("application\/turtle");
   6 $x_turtle    = accepts("application\/x-turtle");
   7 $text_turtle = accepts("text\/turtle");
   8 $json        = accepts("application\/json");
   9 $html        = accepts("text\/html");
  10 $xhtml       = accepts("application\/xhtml\+xml");
  11 $text_plain  = accepts("text\/plain");
  12
  13 $name = basename($_SERVER['REQUEST_URI']);
  14
  15 # Return Turtle ontology
  16 if ($turtle or $x_turtle or $text_turtle) {
  17         header("Content-Type: application/x-turtle");
  18         passthru("cat ./$name.ttl");
  19
  20 # Return ontology translated into rdf+xml
  21 } else if ($rdfxml) {
  22         header("Content-Type: application/rdf+xml");
  23         passthru("~/bin/rapper -q -i turtle -o rdfxml-abbrev ./$name.ttl");
  24
  25 } else if ($json) {
  26         header("Content-Type: application/json");
  27         passthru("~/bin/rapper -q -i turtle -o json ./$name.ttl");
  28
  29 # Return HTML documentation
  30 } else if ($html or $xhtml) {
  31         if ($html) {
  32                 header("Content-Type: text/html");
  33         } else {
  34                 header("Content-Type: application/xhtml+xml");
  35         }
  36         $name = basename($_SERVER['REQUEST_URI']);
  37         passthru("cat ./$name.html | sed '
  38 s/<\/body>/<div style=\"font-size: smaller; color: gray; text-align: right; margin: 1ex;\">This document is content-negotiated.  If you request it with <code>Accept: application\/x-turtle<\/code> you will get the description in Turtle.  Also supported: <code>application\/rdf+xml<\/code>, <code>application\/json<\/code>, <code>text\/plain<\/code><\/div><\/body>/'");
  39
  40 # Return NTriples (text/plain)
  41 } else if ($text_plain) {
  42         header("Content-Type: text/plain");
  43         passthru("~/bin/rapper -q -i turtle -o ntriples ./$name.ttl");
  44
  45 # Return Turtle ontology by default
  46 } else {
  47         header("Content-Type: application/x-turtle");
  48         passthru("cat ./$name.ttl");
  49 }
  50
  51 function accepts($type) {
  52         global $_SERVER;
  53         if (preg_match("/$type(;q=(\d+\.\d+))?/i", $_SERVER['HTTP_ACCEPT'], $matches)) {
  54                 return isset($matches[2]) ? $matches[2] : 1;
  55         } else {
  56                 return 0;
  57         }
  58 }
  59
  60 ?>