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We are now probing differently for webfinger data

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This commit is contained in:
Michael 2017-09-04 19:13:33 +00:00
parent 2bf6b15833
commit 78d4386332
1 changed files with 51 additions and 61 deletions
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112
src/Network/Probe.php
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@ -83,16 +83,13 @@ class Probe {
} }
/** /**
* @brief Probes for XRD data * @brief Probes for webfinger path via "host-meta"
* *
* @param string $host The host part of an url * @param string $host The host part of an url
* *
* @return array * @return array with template and type of the webfinger template for JSON or XML
* 'lrdd' => Link to LRDD endpoint
* 'lrdd-xml' => Link to LRDD endpoint in XML format
* 'lrdd-json' => Link to LRDD endpoint in JSON format
*/ */
private static function xrd($host) { private static function hostMeta($host) {
// Reset the static variable // Reset the static variable
self::$baseurl = ''; self::$baseurl = '';
@ -109,6 +106,7 @@ class Probe {
if ($ret['success']) { if ($ret['success']) {
$xml = $ret['body']; $xml = $ret['body'];
$xrd = parse_xml_string($xml, false); $xrd = parse_xml_string($xml, false);
$host_url = 'https://'.$host;
} }
if (!is_object($xrd)) { if (!is_object($xrd)) {
@ -119,6 +117,7 @@ class Probe {
} }
$xml = $ret['body']; $xml = $ret['body'];
$xrd = parse_xml_string($xml, false); $xrd = parse_xml_string($xml, false);
$host_url = 'http://'.$host;
} }
if (!is_object($xrd)) { if (!is_object($xrd)) {
logger("No xrd object found for ".$host, LOGGER_DEBUG); logger("No xrd object found for ".$host, LOGGER_DEBUG);
@ -131,7 +130,11 @@ class Probe {
return array(); return array();
} }
$xrd_data = array(); $lrdd = array();
// The following webfinger path is defined in RFC 7033 https://tools.ietf.org/html/rfc7033
// Problem is that Hubzilla currently doesn't provide all data in the JSON webfinger
// compared to the XML webfinger. So this is commented out by now.
// $lrdd = array("application/jrd+json" => $host_url.'/.well-known/webfinger?resource={uri}');
foreach ($links["xrd"]["link"] as $value => $link) { foreach ($links["xrd"]["link"] as $value => $link) {
if (!empty($link["@attributes"])) { if (!empty($link["@attributes"])) {
@ -142,16 +145,10 @@ class Probe {
continue; continue;
} }
if (($attributes["rel"] == "lrdd") if (($attributes["rel"] == "lrdd") && !empty($attributes["template"])) {
&& ($attributes["type"] == "application/xrd+xml") $type = (empty($attributes["type"]) ? '' : $attributes["type"]);
) {
$xrd_data["lrdd-xml"] = $attributes["template"]; $lrdd[$type] = $attributes["template"];
} elseif (($attributes["rel"] == "lrdd")
&& ($attributes["type"] == "application/json")
) {
$xrd_data["lrdd-json"] = $attributes["template"];
} elseif ($attributes["rel"] == "lrdd") {
$xrd_data["lrdd"] = $attributes["template"];
} }
} }
@ -159,7 +156,7 @@ class Probe {
logger("Probing successful for ".$host, LOGGER_DEBUG); logger("Probing successful for ".$host, LOGGER_DEBUG);
return $xrd_data; return $lrdd;
} }
/** /**
@ -217,7 +214,7 @@ class Probe {
*/ */
public static function lrdd($uri) { public static function lrdd($uri) {
$lrdd = self::xrd($uri); $lrdd = self::hostMeta($uri);
$webfinger = null; $webfinger = null;
if (is_bool($lrdd)) { if (is_bool($lrdd)) {
@ -240,7 +237,7 @@ class Probe {
$nick = array_pop($path_parts); $nick = array_pop($path_parts);
do { do {
$lrdd = self::xrd($host); $lrdd = self::hostMeta($host);
$host .= "/".array_shift($path_parts); $host .= "/".array_shift($path_parts);
} while (!$lrdd && (sizeof($path_parts) > 0)); } while (!$lrdd && (sizeof($path_parts) > 0));
} }
@ -250,21 +247,17 @@ class Probe {
return array(); return array();
} }
foreach ($lrdd as $key => $link) { foreach ($lrdd AS $type => $template) {
if ($webfinger) { if ($webfinger) {
continue; continue;
} }
if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) { $path = str_replace('{uri}', urlencode($uri), $template);
continue; $webfinger = self::webfinger($path, $type);
}
$path = str_replace('{uri}', urlencode($uri), $link);
$webfinger = self::webfinger($path);
if (!$webfinger && (strstr($uri, "@"))) { if (!$webfinger && (strstr($uri, "@"))) {
$path = str_replace('{uri}', urlencode("acct:".$uri), $link); $path = str_replace('{uri}', urlencode("acct:".$uri), $template);
$webfinger = self::webfinger($path); $webfinger = self::webfinger($path, $type);
} }
// Special treatment for Mastodon // Special treatment for Mastodon
@ -276,8 +269,8 @@ class Probe {
$addr = $nick."@".$host; $addr = $nick."@".$host;
$path = str_replace('{uri}', urlencode("acct:".$addr), $link); $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
$webfinger = self::webfinger($path); $webfinger = self::webfinger($path, $type);
} }
} }
@ -481,7 +474,7 @@ class Probe {
* *
* @return array fixed webfinger data * @return array fixed webfinger data
*/ */
private static function fixOstatus($webfinger, $lrdd) { private static function fixOstatus($webfinger, $lrdd, $type) {
if (empty($webfinger['links']) || empty($webfinger['subject'])) { if (empty($webfinger['links']) || empty($webfinger['subject'])) {
return $webfinger; return $webfinger;
} }
@ -504,7 +497,7 @@ class Probe {
$url = self::switchScheme($webfinger['subject']); $url = self::switchScheme($webfinger['subject']);
$path = str_replace('{uri}', urlencode($url), $lrdd); $path = str_replace('{uri}', urlencode($url), $lrdd);
$webfinger2 = self::webfinger($path); $webfinger2 = self::webfinger($path, $type);
// Is the new webfinger detectable as OStatus? // Is the new webfinger detectable as OStatus?
if (self::ostatus($webfinger2, true)) { if (self::ostatus($webfinger2, true)) {
@ -537,7 +530,7 @@ class Probe {
if ($host == 'twitter.com') { if ($host == 'twitter.com') {
return array("network" => NETWORK_TWITTER); return array("network" => NETWORK_TWITTER);
} }
$lrdd = self::xrd($host); $lrdd = self::hostMeta($host);
if (is_bool($lrdd)) { if (is_bool($lrdd)) {
return array(); return array();
@ -547,7 +540,7 @@ class Probe {
while (!$lrdd && (sizeof($path_parts) > 1)) { while (!$lrdd && (sizeof($path_parts) > 1)) {
$host .= "/".array_shift($path_parts); $host .= "/".array_shift($path_parts);
$lrdd = self::xrd($host); $lrdd = self::hostMeta($host);
} }
if (!$lrdd) { if (!$lrdd) {
logger('No XRD data was found for '.$uri, LOGGER_DEBUG); logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
@ -579,7 +572,7 @@ class Probe {
if (strpos($uri, '@twitter.com')) { if (strpos($uri, '@twitter.com')) {
return array("network" => NETWORK_TWITTER); return array("network" => NETWORK_TWITTER);
} }
$lrdd = self::xrd($host); $lrdd = self::hostMeta($host);
if (is_bool($lrdd)) { if (is_bool($lrdd)) {
return array(); return array();
@ -600,19 +593,17 @@ class Probe {
/// @todo Do we need the prefix "acct:" or "acct://"? /// @todo Do we need the prefix "acct:" or "acct://"?
foreach ($lrdd as $key => $link) { foreach ($lrdd AS $type => $template) {
if ($webfinger) { if ($webfinger) {
continue; continue;
} }
if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
continue;
}
// At first try it with the given uri // At first try it with the given uri
$path = str_replace('{uri}', urlencode($uri), $link); $path = str_replace('{uri}', urlencode($uri), $template);
$webfinger = self::webfinger($path); $webfinger = self::webfinger($path, $type);
// Fix possible problems with GNU Social probing to wrong scheme // Fix possible problems with GNU Social probing to wrong scheme
$webfinger = self::fixOstatus($webfinger, $link); $webfinger = self::fixOstatus($webfinger, $template, $type);
// We cannot be sure that the detected address was correct, so we don't use the values // We cannot be sure that the detected address was correct, so we don't use the values
if ($webfinger && ($uri != $addr)) { if ($webfinger && ($uri != $addr)) {
@ -622,16 +613,17 @@ class Probe {
// Try webfinger with the address (user@domain.tld) // Try webfinger with the address (user@domain.tld)
if (!$webfinger) { if (!$webfinger) {
$path = str_replace('{uri}', urlencode($addr), $link); $path = str_replace('{uri}', urlencode($addr), $template);
$webfinger = self::webfinger($path); $webfinger = self::webfinger($path, $type);
} }
// Mastodon needs to have it with "acct:" // Mastodon needs to have it with "acct:"
if (!$webfinger) { if (!$webfinger) {
$path = str_replace('{uri}', urlencode("acct:".$addr), $link); $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
$webfinger = self::webfinger($path); $webfinger = self::webfinger($path, $type);
} }
} }
if (!$webfinger) { if (!$webfinger) {
return self::feed($uri); return self::feed($uri);
} }
@ -687,35 +679,33 @@ class Probe {
* *
* @return array webfinger data * @return array webfinger data
*/ */
private static function webfinger($url) { private static function webfinger($url, $type) {
$xrd_timeout = Config::get('system', 'xrd_timeout', 20); $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
$redirects = 0; $redirects = 0;
$ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml')); $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => $type));
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) { if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false; return false;
} }
$data = $ret['body']; $data = $ret['body'];
// This is a bugfix for this issue: https://github.com/redmatrix/hubzilla/issues/851 $webfinger = json_decode($data, true);
// $data = str_replace('&url=', '&url=', $data); if (is_array($webfinger)) {
// we have to decide if we want to create a workaround - or we wait for an update
$xrd = parse_xml_string($data, false);
if (!is_object($xrd)) {
// If it is not XML, maybe it is JSON
$webfinger = json_decode($data, true);
if (!isset($webfinger["links"])) { if (!isset($webfinger["links"])) {
logger("No json webfinger links for ".$url, LOGGER_DEBUG); logger("No json webfinger links for ".$url, LOGGER_DEBUG);
return false; return false;
} }
return $webfinger; return $webfinger;
} }
// If it is not JSON, maybe it is XML
$xrd = parse_xml_string($data, false);
if (!is_object($xrd)) {
logger("No webfinger data retrievable for ".$url, LOGGER_DEBUG);
return false;
}
$xrd_arr = xml::element_to_array($xrd); $xrd_arr = xml::element_to_array($xrd);
if (!isset($xrd_arr["xrd"]["link"])) { if (!isset($xrd_arr["xrd"]["link"])) {
logger("No XML webfinger links for ".$url, LOGGER_DEBUG); logger("No XML webfinger links for ".$url, LOGGER_DEBUG);