/usr/share/php/arc/parsers/ARC2_JSONParser.php is in libarc-php 2~20101006-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* ARC2 JSON Parser
* Does not extract triples, needs sub-class for RDF extraction
*
* @author Benjamin Nowack <bnowack@semsol.com>
* @license http://arc.semsol.org/license
* @homepage <http://arc.semsol.org/>
* @package ARC2
* @version 2010-11-16
*/
ARC2::inc('RDFParser');
class ARC2_JSONParser extends ARC2_RDFParser {
function __construct($a, &$caller) {
parent::__construct($a, $caller);
}
function __init() {
parent::__init();
}
/* */
function x($re, $v, $options = 'si') {
while (preg_match('/^\s*(\/\*.*\*\/)(.*)$/Usi', $v, $m)) {/* comment removal */
$v = $m[2];
}
$this->unparsed_code = (strlen($this->unparsed_code) > strlen($v)) ? $v : $this->unparsed_code;
return ARC2::x($re, $v, $options);
}
function parse($path, $data = '') {
$this->state = 0;
/* reader */
if (!$this->v('reader')) {
ARC2::inc('Reader');
$this->reader = new ARC2_Reader($this->a, $this);
}
$this->reader->setAcceptHeader('Accept: application/json; q=0.9, */*; q=0.1');
$this->reader->activate($path, $data);
$this->x_base = isset($this->a['base']) && $this->a['base'] ? $this->a['base'] : $this->reader->base;
/* parse */
$doc = '';
while ($d = $this->reader->readStream()) {
$doc .= $d;
}
$this->reader->closeStream();
unset($this->reader);
$doc = preg_replace('/^[^\{]*(.*\})[^\}]*$/is', '\\1', $doc);
$this->unparsed_code = $doc;
list($this->struct, $rest) = $this->extractObject($doc);
return $this->done();
}
/* */
function extractObject($v) {
if (function_exists('json_decode')) return array(json_decode($v, 1), '');
$r = array();
/* sub-object */
if ($sub_r = $this->x('\{', $v)) {
$v = $sub_r[1];
while ((list($sub_r, $v) = $this->extractEntry($v)) && $sub_r) {
$r[$sub_r['key']] = $sub_r['value'];
}
if ($sub_r = $this->x('\}', $v)) $v = $sub_r[1];
}
/* sub-list */
elseif ($sub_r = $this->x('\[', $v)) {
$v = $sub_r[1];
while ((list($sub_r, $v) = $this->extractObject($v)) && $sub_r) {
$r[] = $sub_r;
$v = ltrim($v, ',');
}
if ($sub_r = $this->x('\]', $v)) $v = $sub_r[1];
}
/* sub-value */
elseif ((list($sub_r, $v) = $this->extractValue($v)) && ($sub_r !== false)) {
$r = $sub_r;
}
return array($r, $v);
}
function extractEntry($v) {
if ($r = $this->x('\,', $v)) $v = $r[1];
/* k */
if ($r = $this->x('\"([^\"]+)\"\s*\:', $v)) {
$k = $r[1];
$sub_v = $r[2];
if (list($sub_r, $sub_v) = $this->extractObject($sub_v)) {
return array(
array('key' => $k, 'value' => $sub_r),
$sub_v
);
}
}
return array(0, $v);
}
function extractValue($v) {
if ($r = $this->x('\,', $v)) $v = $r[1];
if ($sub_r = $this->x('null', $v)) {
return array(null, $sub_r[1]);
}
if ($sub_r = $this->x('(true|false)', $v)) {
return array($sub_r[1], $sub_r[2]);
}
if ($sub_r = $this->x('([\-\+]?[0-9\.]+)', $v)) {
return array($sub_r[1], $sub_r[2]);
}
if ($sub_r = $this->x('\"', $v)) {
$rest = $sub_r[1];
if (preg_match('/^([^\x5c]*|.*[^\x5c]|.*\x5c{2})\"(.*)$/sU', $rest, $m)) {
$val = $m[1];
/* unescape chars (single-byte) */
$val = preg_replace('/\\\u(.{4})/e', 'chr(hexdec("\\1"))', $val);
//$val = preg_replace('/\\\u00(.{2})/e', 'rawurldecode("%\\1")', $val);
/* other escaped chars */
$from = array('\\\\', '\r', '\t', '\n', '\"', '\b', '\f', '\/');
$to = array("\\", "\r", "\t", "\n", '"', "\b", "\f", "/");
$val = str_replace($from, $to, $val);
return array($val, $m[2]);
}
}
return array(false, $v);
}
/* */
function getObject() {
return $this->v('struct', array());
}
function getTriples() {
return $this->v('triples', array());
}
function countTriples() {
return $this->t_count;
}
function addT($s = '', $p = '', $o = '', $s_type = '', $o_type = '', $o_dt = '', $o_lang = '') {
$o = $this->toUTF8($o);
//echo str_replace($this->base, '', "-----\n adding $s / $p / $o\n-----\n");
$t = array('s' => $s, 'p' => $p, 'o' => $o, 's_type' => $s_type, 'o_type' => $o_type, 'o_datatype' => $o_dt, 'o_lang' => $o_lang);
if ($this->skip_dupes) {
$h = md5(serialize($t));
if (!isset($this->added_triples[$h])) {
$this->triples[$this->t_count] = $t;
$this->t_count++;
$this->added_triples[$h] = true;
}
}
else {
$this->triples[$this->t_count] = $t;
$this->t_count++;
}
}
/* */
}
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