public function run($r, $graphUri)
{
include_once 'ARC2/ARC2.php';
$uri = $r->getUri();
$url = $r->getLocator();
$config = array('auto_extract' => 0);
$parser = ARC2::getSemHTMLParser();
@$parser->parse($url);
@$parser->extractRDF('rdfa');
$triples = $parser->getTriples();
if (!is_array($triples) || count($triples) == 0) {
return false;
}
$data = array();
$data[$uri] = array();
// transform arc2 triple to RDF_PHP structure
// TODO: blank nodes?
foreach ($triples as $triple) {
// but only for the requested resource and not ignored properties
// TODO: use a generic fetch preset from linkeddata wrapper
if ($triple['s'] == $uri && array_search($triple['p'], $this->_config->ignore->toArray()) === false) {
// create resource objects
if ($triple['o_type'] == 'uri') {
$data[$uri][$triple['p']][] = array('type' => 'uri', 'value' => $triple['o']);
}
// create literal objects
if ($triple['o_type'] == 'literal') {
$newObject = array('type' => 'literal', 'value' => $triple['o']);
if ($triple['o_lang'] != '') {
$newObject['lang'] = $triple['o_lang'];
}
if ($triple['o_datatype'] != '') {
$newObject['datatype'] = $triple['o_datatype'];
}
$data[$uri][$triple['p']][] = $newObject;
}
}
}
// set a default class type if configured and no type was extracted
if (!isset($data[$uri][EF_RDF_TYPE]) && isset($this->_config->defaultClass)) {
$data[$uri][EF_RDF_TYPE][] = array('type' => 'uri', 'value' => $this->_config->defaultClass);
}
$fullResult['status_description'] = "RDFa data found for URI {$uri}";
$fullResult['add'] = $data;
$fullResult['status_codes'] = array(Erfurt_Wrapper::NO_MODIFICATIONS);
$fullResult['status_codes'][] = Erfurt_Wrapper::RESULT_HAS_ADD;
return $fullResult;
}
/**
* Extrahiert eingebettetes rdfa aus einer beliebigen HTML Seite und
* speichert es im triple store
* @param string $url
* @return Response Ein Responseobjekt
*/
function extractRDFa($url)
{
global $ep;
// Wenn es die URL im Graph schon gibt, nichts machen
if (graphContainsUrl($url)) {
$res = new Response(null, "URL {$url} already visited, skip indexing");
return $res;
} else {
$parser = ARC2::getSemHTMLParser();
$parser->parse($url);
$parser->extractRDF('rdfa');
// triple Darstellung
$triples = $parser->getTriples();
// Wenn kein rdfa gefunden wurde
if (count($triples) < 1) {
$res = new Response(null, "URL {$url} contains no rdfa");
return $res;
}
// in Datenbank einfügen
$ep->insert($triples, $url);
$res = new Response(null, "URL {$url}: added " . count($triples) . " triples");
return $res;
}
}
<?php
//error_reporting(0);
include 'config.php';
include ARC_DIR . 'ARC2.php';
include_once BASE_DIR . 'checkLogin.php';
ARC2::inc('PMJ_ResourceGraphPlugin');
//require_once(CLASSES_DIR . 'Recording.php');
header('Content-type: application/json');
$store = ARC2::getStore($config);
if (!$store->isSetUp()) {
$store->setUp();
}
/* Parse what ARC can from the page */
//this can take a bit long, though.
$parser = ARC2::getSemHTMLParser();
$parser->parse($_POST['page']);
$parser->extractRDF('dc rdfa');
$triples = $parser->getTriples();
$q = 'INSERT INTO <> { ' . $parser->toNTriples($triples) . ' } ';
$parseRS = $store->query($q);
$graph = ARC2::getComponent('PMJ_ResourceGraphPlugin', $graphConfig);
$recordingRes = ARC2::getComponent('PMJ_ResourcePlusPlugin', $graphConfig);
$userURI = $_SESSION['userURI'];
$recordingURI = 'http://data.rubrick-jetpack.org/Recordings/' . sha1($userURI . time());
$recordingRes->setURI($recordingURI);
$recordingRes->addPropValue('rdf:type', 'r:Recording', 'uri');
$recordingRes->addPropValue('sioc:has_creator', $userURI, 'uri');
$recordingRes->addPropValue('r:hasPage', $_POST['page'], 'uri');
$recordingRes->addPropValue('dcterms:created', date('c'), 'literal', 'xsd:dateTime');
$recordingRes->addPropValue('r:hasRubric', $_POST['rubric'], 'uri');
function semhtml($url, $output, $type = '')
{
$parser = ARC2::getSemHTMLParser($this->a);
$parser->parse($url);
$parser->extractRDF($type);
$triples = $parser->getTriples();
$document = $parser->toTurtle($triples);
return $this->to_rdf($url, $document, $output);
}
function sendPing($to, $message, $base_uri, $verbose = false)
{
$ret = "<br/>\n";
$to = trim($to);
// fetch the user's profile
$person = new MyProfile($to, $base_uri, SPARQL_ENDPOINT);
$person->load();
$profile = $person->get_profile();
$to_name = $person->get_name();
$to_email = $person->get_email();
$pingback_service = $profile->get("pingback:to");
// set form data
$source = $_SESSION['webid'];
// parse the pingback form
$config = array('auto_extract' => 0);
$parser = ARC2::getSemHTMLParser($config);
$parser->parse($pingback_service);
$parser->extractRDF('rdfa');
// load triples
$triples = $parser->getTriples();
// proceed only if the user has defined a pingback:to relation
if ($pingback_service != null) {
if (sizeof($triples) > 0) {
//echo "<pre>" . print_r($triples, true) . "</pre>\n";
foreach ($triples as $triple) {
// proceed only if we have a valid pingback resource
if ($triple['o'] == 'http://purl.org/net/pingback/Container') {
$fields = array('source' => $source, 'target' => $to, 'comment' => $message);
// Should really replace curl with an ajax call
//open connection to pingback service
$ch = curl_init();
//set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $pingback_service);
curl_setopt($ch, CURLOPT_POST, count($fields));
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
//execute post
$return = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
//close connection
curl_close($ch);
if ($httpCode == '201' || $httpCode == '202') {
$ret .= success('Message delivered!');
} else {
$ret .= error('Something happened and I couldn\'t deliver the message!');
$ret .= "<p>Details:</p>\n";
$ret .= "</p>" . $return . "</p>\n";
}
break;
}
}
} else {
$ret .= " <p>{$pingback_service} does not comply with semantic pingback standards! Showing the pingback service page instead.</p>\n";
// show frame
$ret .= " <iframe src=\"{$pingback_service}\" width=\"100%\" height=\"300\">\n";
$ret .= " <p>Your browser does not support iframes.</p>\n";
$ret .= " </iframe>\n";
}
} else {
// no valid pingback service found, fallback to AKSW
$ret .= " <p>Could not find a pingback service for the given WebID. Here is a generic pingback service provided by http://pingback.aksw.org/.</p>\n";
$ret .= " <iframe src=\"http://pingback.aksw.org/\" width=\"100%\" height=\"300\">\n";
$ret .= " <p>Your browser does not support iframes.</p>\n";
$ret .= " </iframe>\n";
}
if ($verbose) {
return $ret;
}
}
/**
* Add the triples parsed from the supplied RDFa to the graph
* @param string html the HTML containing RDFa to parse
* @param string base the base URI against which relative URIs in the Turtle document will be resolved
*/
function add_rdfa($html, $base = '')
{
if ($html) {
$parser = ARC2::getSemHTMLParser();
$parser->parse($base, $html);
$parser->extractRDF('rdfa');
$this->_add_arc2_triple_list($parser->getTriples());
unset($parser);
}
}
/**
* Stores all subjects of RDF triples extracted from the RDFa representation of a given fragment in this format:
* fragmentURI LOOMP:contains resourceURI .
*
* @param Resource $fragmentRes Resource Object
* @param string $rdfa RDFa representation of a given fragment
*/
private function _saveResFromRDFa($fragmentRes, $rdfa)
{
$parser = ARC2::getSemHTMLParser();
$parser->parse('', $rdfa);
$parser->extractRDF('rdfa');
$triples = $parser->getTriples();
$res = array();
for ($i = 0, $i_max = count($triples); $i < $i_max; $i++) {
$triple = $triples[$i];
if ($triple['s_type'] == "uri") {
if (!in_array($triple['s'], $res)) {
$res[] = $triple['s'];
$this->rdfModel->add(new Statement($fragmentRes, LOOMP::CONTAINS(), new Resource($triple['s'])));
}
}
if ($triple['o_type'] == 'literal') {
$obj = new Literal($triple['o'], $triple['o_lang']);
if ($triple['o_datatype']) {
$obj->setDatatype($triple['o_datatype']);
}
} else {
$obj = new Resource($triple['o']);
}
$this->rdfModel->add(new Statement(new Resource($triple['s']), new Resource($triple['p']), $obj));
}
}
public function __construct($u)
{
$this->_rdfa_parser = ARC2::getSemHTMLParser();
$this->_rdfa_parser->parse($u);
$this->_rdfa_parser->extractRDF('rdfa');
$index = $this->_rdfa_parser->getSimpleIndex(0);
foreach ($index[$this->Base()] as $prop => $values) {
$matches = array();
if (preg_match('!^http://opengraphprotocol.org/schema/(.+)$!i', $prop, $matches)) {
$p = strtolower($matches[1]);
} elseif (preg_match('!^http://ogp.me/ns#(.+)$!i', $prop, $matches)) {
$p = strtolower($matches[1]);
} else {
$p = $prop;
}
foreach ($values as $value) {
if ($value['type'] == 'bnode') {
continue;
}
$this->_data[$p][] = $value['value'];
}
}
return $this;
}
