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<?php
/*
homepage: http://arc.semsol.org/
license: http://arc.semsol.org/license
function: result format detection
author: Benjamin Nowack
version: 2008-08-04
*/
function ARC2_getPreferredFormat($default = 'plain') {
$formats = array(
'html' => 'HTML', 'text/html' => 'HTML', 'xhtml+xml' => 'HTML',
'rdfxml' => 'RDFXML', 'rdf+xml' => 'RDFXML',
'ntriples' => 'NTriples', 'rdf+n3' => 'Turtle', 'x-turtle' => 'Turtle', 'turtle' => 'Turtle',
'rdfjson' => 'RDFJSON', 'json' => 'RDFJSON',
'xml' => 'XML',
'legacyjson' => 'LegacyJSON'
);
$prefs = array();
$o_vals = array();
/* accept header */
if ($vals = explode(',', $_SERVER['HTTP_ACCEPT'])) {
foreach ($vals as $val) {
if (preg_match('/(rdf\+n3|x\-turtle|rdf\+xml|text\/html|xhtml\+xml|xml|json)/', $val, $m)) {
$o_vals[$m[1]] = 1;
if (preg_match('/\;q\=([0-9\.]+)/', $val, $sub_m)) {
$o_vals[$m[1]] = 1 * $sub_m[1];
}
}
}
}
/* arg */
if (isset($_GET['format'])) $o_vals[$_GET['format']] = 1.1;
/* rank */
arsort($o_vals);
foreach ($o_vals as $val => $prio) {
$prefs[] = $val;
}
/* default */
$prefs[] = $default;
foreach ($prefs as $pref) {
if (isset($formats[$pref])) {
return $formats[$pref];
}
}
}
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