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<?php
namespace Zotlabs\Lib;
use Zotlabs\Web\HTTPSig;
class ZotURL {
static public function fetch($url,$channel) {
$ret = [ 'success' => false ];
if(strpos($url,'x-zot:') !== 0) {
return $ret;
}
if(! $url) {
return $ret;
}
$portable_url = substr($url,6);
$u = explode('/',$portable_url);
$portable_id = $u[0];
$hosts = self::lookup($portable_id);
if(! $hosts) {
return $ret;
}
foreach($hosts as $h) {
$newurl = $h . '/id/' . $portable_url;
$m = parse_url($newurl);
$data = json_encode([ 'zot_token' => random_string() ]);
if($channel && $m) {
$headers = [
'Accept' => 'application/x-zot+json',
'Content-Type' => 'application/x-zot+json',
'X-Zot-Token' => random_string(),
'Digest' => HTTPSig::generate_digest_header($data),
'Host' => $m['host'],
'(request-target)' => 'post ' . get_request_string($newurl)
];
$h = HTTPSig::create_sig($headers,$channel['channel_prvkey'],channel_url($channel),false);
}
else {
$h = [ 'Accept: application/x-zot+json' ];
}
$result = [];
$redirects = 0;
$x = z_post_url($newurl,$data,$redirects, [ 'headers' => $h ] );
if($x['success']) {
return $x;
}
}
return $ret;
}
static public function is_zoturl($url) {
if(strpos($url,'x-zot:') === 0) {
return true;
}
return false;
}
static public function lookup($portable_id) {
$r = q("select * from hubloc left join site on hubloc_url = site_url where hubloc_hash = '%s' and site_dead = 0 order by hubloc_primary desc",
dbesc($portable_id)
);
if(! $r) {
// extend to network lookup
return false;
}
return ids_to_array($r,'hubloc_url');
}
}
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