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Commit 0fa57948 authored by Evan Prodromou's avatar Evan Prodromou

move linkheader.php to core

parent abf694ae
<?php
/**
* @todo Add file header and documentation.
*/
class LinkHeader
{
var $href;
var $rel;
var $type;
function __construct($str)
{
preg_match('/^<[^>]+>/', $str, $uri_reference);
//if (empty($uri_reference)) return;
$this->href = trim($uri_reference[0], '<>');
$this->rel = array();
$this->type = null;
// remove uri-reference from header
$str = substr($str, strlen($uri_reference[0]));
// parse link-params
$params = explode(';', $str);
foreach ($params as $param) {
if (empty($param)) continue;
list($param_name, $param_value) = explode('=', $param, 2);
$param_name = trim($param_name);
$param_value = preg_replace('(^"|"$)', '', trim($param_value));
// for now we only care about 'rel' and 'type' link params
// TODO do something with the other links-params
switch ($param_name) {
case 'rel':
$this->rel = trim($param_value);
break;
case 'type':
$this->type = trim($param_value);
}
}
}
static function getLink($response, $rel=null, $type=null)
{
$headers = $response->getHeader('Link');
if ($headers) {
// Can get an array or string, so try to simplify the path
if (!is_array($headers)) {
$headers = array($headers);
}
foreach ($headers as $header) {
$lh = new LinkHeader($header);
if ((is_null($rel) || $lh->rel == $rel) &&
(is_null($type) || $lh->type == $type)) {
return $lh->href;
}
}
}
return null;
}
}
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