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modularise webfinger and make it service agnostic

This commit is contained in:
Mike Macgirvin 2010-10-12 16:50:12 -07:00
parent a340f70c51
commit 744edcf2ab
2 changed files with 78 additions and 46 deletions
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122
boot.php
View File

@ -833,57 +833,89 @@ function convert_xml_element_to_array($xml_element, &$recursion_depth=0) {
// Return an empty string if email-style addresses but webfinger fails,
// or if the resultant personal XRD doesn't contain a DFRN profile.
if(! function_exists('webfinger')) {
function webfinger($s) {
if(! function_exists('webfinger_dfrn')) {
function webfinger_dfrn($s) {
if(! strstr($s,'@')) {
return $s;
}
$host = substr($s,strpos($s,'@') + 1);
$url = 'http://' . $host . '/.well-known/host-meta' ;
$xml = fetch_url($url);
if (! $xml)
return '';
$h = simplexml_load_string($xml);
$arr = convert_xml_element_to_array($h);
if(! isset($arr['xrd']['link']))
return '';
$link = $arr['xrd']['link'];
if(! isset($link[0]))
$links = array($link);
else
$links = $link;
foreach($links as $link)
if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd')
$tpl = $link['@attributes']['template'];
if((empty($tpl)) || (! strpos($tpl, '{uri}')))
return '';
$pxrd = str_replace('{uri}', urlencode('acct://'.$s), $tpl);
$xml = fetch_url($pxrd);
if (! $xml)
return '';
$h = simplexml_load_string($xml);
$arr = convert_xml_element_to_array($h);
if(! isset($arr['xrd']['link']))
return '';
$link = $arr['xrd']['link'];
if(! isset($link[0]))
$links = array($link);
else
$links = $link;
foreach($links as $link)
if($link['@attributes']['rel'] == NAMESPACE_DFRN)
return $link['@attributes']['href'];
$links = webfinger($s);
if(count($links)) {
foreach($links as $link)
if($link['@attributes']['rel'] == NAMESPACE_DFRN)
return $link['@attributes']['href'];
}
return '';
}}
// Given an email style address, perform webfinger lookup and
// return the array of link attributes from the personal XRD file.
// On error/failure return an empty array.
if(! function_exists('webfinger')) {
function webfinger($s) {
$host = '';
if(strstr($s,'@')) {
$host = substr($s,strpos($s,'@') + 1);
}
if(strlen($host)) {
$tpl = fetch_lrdd_template($host);
if(strlen($tpl)) {
$pxrd = str_replace('{uri}', urlencode('acct://'.$s), $tpl);
$links = fetch_xrd_links($pxrd);
if(! count($links)) {
// try without the double slashes
$pxrd = str_replace('{uri}', urlencode('acct:'.$s), $tpl);
$links = fetch_xrd_links($pxrd);
}
return $links;
}
}
return array();
}}
// Given a host name, locate the LRDD template from that
// host. Returns the LRDD template or an empty string on
// error/failure.
if(! function_exists('fetch_lrdd_template')) {
function fetch_lrdd_template($host) {
$tpl = '';
$url = 'http://' . $host . '/.well-known/host-meta' ;
$links = fetch_xrd_links($url);
if(count($links)) {
foreach($links as $link)
if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd')
$tpl = $link['@attributes']['template'];
}
if(! strpos($tpl,'{uri}'))
$tpl = '';
return $tpl;
}}
// Given a URL, retrieve the page as an XRD document.
// Return an array of links.
// on error/failure return empty array.
if(! function_exists('fetch_xrd_links')) {
function fetch_xrd_links($url) {
$xml = fetch_url($url);
if (! $xml)
return array();
$h = simplexml_load_string($xml);
$arr = convert_xml_element_to_array($h);
if(isset($arr['xrd']['link'])) {
$link = $arr['xrd']['link'];
if(! isset($link[0]))
$links = array($link);
else
$links = $link;
return $links;
}
return array();
}}
// Convert an ACL array to a storable string

2
mod/dfrn_request.php
View File

@ -181,7 +181,7 @@ function dfrn_request_post(&$a) {
// Canonicalise email-style profile locator
$url = webfinger($url);
$url = webfinger_dfrn($url);
if(! strlen($url)) {
notice( t("Unable to resolve your name at the provided location.") . EOL);