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Add link header parse method.

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Dave Longley 2013-09-13 13:07:18 -04:00
parent 82e93347c1
commit 944e9ee886
1 changed files with 56 additions and 5 deletions
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61
jsonld.php
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@ -1,7 +1,7 @@
<?php
/**
* PHP implementation of the JSON-LD API.
* Version: 0.1.0
* Version: 0.2.0
*
* @author Dave Longley
*
@ -161,6 +161,58 @@ function jsonld_to_rdf($input, $options=array()) {
return $p->toRDF($input, $options);
}
/**
* Parses a link header. The results will be key'd by the value of "rel".
*
* Link: <http://json-ld.org/contexts/person.jsonld>; rel="http://www.w3.org/ns/json-ld#context"; type="application/ld+json"
*
* Parses as: {
* 'http://www.w3.org/ns/json-ld#context': {
* target: http://json-ld.org/contexts/person.jsonld,
* type: 'application/ld+json'
* }
* }
*
* If there is more than one "rel" with the same IRI, then entries in the
* resulting map for that "rel" will be arrays.
*
* @param string $header the link header to parse.
*
* @return assoc the parsed result.
*/
function jsonld_parse_link_header($header) {
$rval = array();
// split on unbracketed/unquoted commas
if(!preg_match_all('/(?:<[^>]*?>|"[^"]*?"|[^,])+/', $header, $entries)) {
return $rval;
}
$r_link_header = '/\s*<([^>]*?)>\s*(?:;\s*(.*))?/';
foreach($entries as $entry) {
$match = preg_match($r_link_header, $entry[0]);
if(!$match) {
continue;
}
$result = array('target' => $match[1]);
$params = $match[2];
$r_params = '/(.*?)=(?:(?:"([^"]*?)")|([^"]*?))\s*(?:(?:;\s*)|$)/';
$matches = preg_match_all($r_params, $params);
foreach($matches as $match) {
$result[$match[1]] = $match[2] ?: $match[3];
}
$rel = $result['rel'] ?: '';
if(!isset($rval, $rel)) {
$rval[$rel] = $result;
}
else if(is_array($rval, $rel)) {
$rval[$rel][] = $result;
}
else {
$rval[$rel] = array($rval[$rel], $result);
}
}
return $rval;
}
/**
* Relabels all blank nodes in the given JSON-LD input.
*
@ -5355,11 +5407,10 @@ jsonld_register_rdf_parser(
* A JSON-LD Exception.
*/
class JsonLdException extends Exception {
protected $type;
protected $details;
protected $cause;
public function __construct($msg, $type, $details=null, $previous=null) {
public function __construct(
$msg, $type, /*$code='error',*/ $details=null, $previous=null) {
$this->type = $type;
//$this->code = $code;
$this->details = $details;
$this->cause = $previous;
parent::__construct($msg, 0, $previous);