mirror of
https://github.com/JHUAPL/aqueduct.git
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68 lines
2.9 KiB
PHP
68 lines
2.9 KiB
PHP
<?php
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/**
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* ARC2 format detection function
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*
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* @author Benjamin Nowack <bnowack@semsol.com>
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* @license http://arc.semsol.org/license
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* @package ARC2
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* @version 2009-10-16
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*/
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function ARC2_getFormat($v, $mtype = '', $ext = '') {
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$r = false;
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/* mtype check (atom, rdf/xml, turtle, n3, mp3, jpg) */
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$r = (!$r && preg_match('/\/atom\+xml/', $mtype)) ? 'atom' : $r;
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$r = (!$r && preg_match('/\/rdf\+xml/', $mtype)) ? 'rdfxml' : $r;
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$r = (!$r && preg_match('/\/(x\-)?turtle/', $mtype)) ? 'turtle' : $r;
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$r = (!$r && preg_match('/\/rdf\+n3/', $mtype)) ? 'n3' : $r;
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/* xml sniffing */
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if (
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!$r &&
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/* starts with angle brackets */
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preg_match('/^\s*\<[^\s]/s', $v) &&
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/* has an xmlns:* declaration or a matching pair of tags */
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(preg_match('/\sxmlns\:?/', $v) || preg_match('/\<([^\s]+).+\<\/\\1\>/s', $v)) &&
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/* not a typical ntriples/turtle/n3 file */
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!preg_match('/\.\s*$/s', $v)
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) {
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while (preg_match('/^\s*\<\?xml[^\r\n]+\?\>\s*/s', $v)) {
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$v = preg_replace('/^\s*\<\?xml[^\r\n]+\?\>\s*/s', '', $v);
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}
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while (preg_match('/^\s*\<\!--.+?--\>\s*/s', $v)) {
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$v = preg_replace('/^\s*\<\!--.+?--\>\s*/s', '', $v);
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}
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/* doctype checks (html, rdf) */
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$r = (!$r && preg_match('/^\s*\<\!DOCTYPE\s+html[\s|\>]/is', $v)) ? 'html' : $r;
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$r = (!$r && preg_match('/^\s*\<\!DOCTYPE\s+[a-z0-9\_\-]\:RDF\s/is', $v)) ? 'rdfxml' : $r;
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/* markup checks */
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$v = preg_replace('/^\s*\<\!DOCTYPE\s.*\]\>/is', '', $v);
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$r = (!$r && preg_match('/^\s*\<rss\s+[^\>]*version/s', $v)) ? 'rss' : $r;
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$r = (!$r && preg_match('/^\s*\<feed\s+[^\>]+http\:\/\/www\.w3\.org\/2005\/Atom/s', $v)) ? 'atom' : $r;
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$r = (!$r && preg_match('/^\s*\<opml\s/s', $v)) ? 'opml' : $r;
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$r = (!$r && preg_match('/^\s*\<html[\s|\>]/is', $v)) ? 'html' : $r;
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$r = (!$r && preg_match('/^\s*\<sparql\s+[^\>]+http\:\/\/www\.w3\.org\/2005\/sparql\-results\#/s', $v)) ? 'sparqlxml' : $r;
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$r = (!$r && preg_match('/^\s*\<[^\>]+http\:\/\/www\.w3\.org\/2005\/sparql\-results#/s', $v)) ? 'srx' : $r;
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$r = (!$r && preg_match('/^\s*\<[^\s]*RDF[\s\>]/s', $v)) ? 'rdfxml' : $r;
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$r = (!$r && preg_match('/^\s*\<[^\>]+http\:\/\/www\.w3\.org\/1999\/02\/22\-rdf/s', $v)) ? 'rdfxml' : $r;
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$r = !$r ? 'xml' : $r;
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}
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/* json|jsonp */
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if (!$r && preg_match('/^[a-z0-9\.\(]*\s*[\{\[].*/s', trim($v))) {
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/* google social graph api */
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$r = (!$r && preg_match('/\"canonical_mapping\"/', $v)) ? 'sgajson' : $r;
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/* crunchbase api */
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$r = (!$r && preg_match('/\"permalink\"/', $v)) ? 'cbjson' : $r;
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$r = !$r ? 'json' : $r;
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}
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/* turtle/n3 */
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$r = (!$r && preg_match('/\@(prefix|base)/i', $v)) ? 'turtle' : $r;
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$r = (!$r && preg_match('/^(ttl)$/', $ext)) ? 'turtle' : $r;
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$r = (!$r && preg_match('/^(n3)$/', $ext)) ? 'n3' : $r;
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/* ntriples */
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$r = (!$r && preg_match('/^\s*(_:|<).+?\s+<[^>]+?>\s+\S.+?\s*\.\s*$/sm', $v)) ? 'ntriples' : $r;
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$r = (!$r && preg_match('/^(nt)$/', $ext)) ? 'ntriples' : $r;
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return $r;
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}
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