683 lines
17 KiB
PHP
683 lines
17 KiB
PHP
<?php
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// curl wrapper. If binary flag is true, return binary
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// results.
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if(! function_exists('fetch_url')) {
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function fetch_url($url,$binary = false, &$redirects = 0) {
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$a = get_app();
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$ch = curl_init($url);
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if(($redirects > 8) || (! $ch))
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return false;
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
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curl_setopt($ch, CURLOPT_USERAGENT, "Friendika");
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$curl_time = intval(get_config('system','curl_timeout'));
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curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
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// by default we will allow self-signed certs
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// but you can override this
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$check_cert = get_config('system','verifyssl');
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
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$prx = get_config('system','proxy');
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if(strlen($prx)) {
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curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
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curl_setopt($ch, CURLOPT_PROXY, $prx);
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$prxusr = get_config('system','proxyuser');
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if(strlen($prxusr))
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curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
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}
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if($binary)
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curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
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$a->set_curl_code(0);
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// don't let curl abort the entire application
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// if it throws any errors.
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$s = @curl_exec($ch);
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$base = $s;
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$curl_info = curl_getinfo($ch);
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$http_code = $curl_info['http_code'];
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$header = '';
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// Pull out multiple headers, e.g. proxy and continuation headers
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// allow for HTTP/2.x without fixing code
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while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) {
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$chunk = substr($base,0,strpos($base,"\r\n\r\n")+4);
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$header .= $chunk;
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$base = substr($base,strlen($chunk));
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}
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if($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
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$matches = array();
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preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
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$url = trim(array_pop($matches));
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$url_parsed = @parse_url($url);
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if (isset($url_parsed)) {
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$redirects++;
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return fetch_url($url,$binary,$redirects);
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}
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}
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$a->set_curl_code($http_code);
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$body = substr($s,strlen($header));
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$a->set_curl_headers($header);
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curl_close($ch);
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return($body);
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}}
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// post request to $url. $params is an array of post variables.
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if(! function_exists('post_url')) {
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function post_url($url,$params, $headers = null, &$redirects = 0) {
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$a = get_app();
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$ch = curl_init($url);
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if(($redirects > 8) || (! $ch))
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return false;
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
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curl_setopt($ch, CURLOPT_POST,1);
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curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
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curl_setopt($ch, CURLOPT_USERAGENT, "Friendika");
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$curl_time = intval(get_config('system','curl_timeout'));
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curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
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if(defined('LIGHTTPD')) {
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if(!is_array($headers)) {
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$headers = array('Expect:');
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} else {
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if(!in_array('Expect:', $headers)) {
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array_push($headers, 'Expect:');
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}
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}
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}
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if($headers)
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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$check_cert = get_config('system','verifyssl');
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
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$prx = get_config('system','proxy');
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if(strlen($prx)) {
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curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
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curl_setopt($ch, CURLOPT_PROXY, $prx);
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$prxusr = get_config('system','proxyuser');
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if(strlen($prxusr))
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curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
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}
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$a->set_curl_code(0);
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// don't let curl abort the entire application
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// if it throws any errors.
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$s = @curl_exec($ch);
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$base = $s;
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$curl_info = curl_getinfo($ch);
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$http_code = $curl_info['http_code'];
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$header = '';
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// Pull out multiple headers, e.g. proxy and continuation headers
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// allow for HTTP/2.x without fixing code
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while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) {
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$chunk = substr($base,0,strpos($base,"\r\n\r\n")+4);
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$header .= $chunk;
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$base = substr($base,strlen($chunk));
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}
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if($http_code == 301 || $http_code == 302 || $http_code == 303) {
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$matches = array();
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preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
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$url = trim(array_pop($matches));
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$url_parsed = @parse_url($url);
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if (isset($url_parsed)) {
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$redirects++;
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return post_url($url,$binary,$headers,$redirects);
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}
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}
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$a->set_curl_code($http_code);
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$body = substr($s,strlen($header));
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$a->set_curl_headers($header);
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curl_close($ch);
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return($body);
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}}
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// Generic XML return
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// Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
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// of $st and an optional text <message> of $message and terminates the current process.
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if(! function_exists('xml_status')) {
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function xml_status($st, $message = '') {
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$xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : '');
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if($st)
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logger('xml_status returning non_zero: ' . $st . " message=" . $message);
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header( "Content-type: text/xml" );
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echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n";
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echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n";
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killme();
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}}
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if(! function_exists('http_status_exit')) {
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function http_status_exit($val) {
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if($val >= 400)
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$err = 'Error';
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if($val >= 200 && $val < 300)
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$err = 'OK';
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logger('http_status_exit ' . $val);
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header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
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killme();
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}}
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// convert an XML document to a normalised, case-corrected array
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// used by webfinger
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if(! function_exists('convert_xml_element_to_array')) {
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function convert_xml_element_to_array($xml_element, &$recursion_depth=0) {
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// If we're getting too deep, bail out
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if ($recursion_depth > 512) {
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return(null);
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}
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if (!is_string($xml_element) &&
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!is_array($xml_element) &&
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(get_class($xml_element) == 'SimpleXMLElement')) {
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$xml_element_copy = $xml_element;
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$xml_element = get_object_vars($xml_element);
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}
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if (is_array($xml_element)) {
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$result_array = array();
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if (count($xml_element) <= 0) {
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return (trim(strval($xml_element_copy)));
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}
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foreach($xml_element as $key=>$value) {
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$recursion_depth++;
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$result_array[strtolower($key)] =
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convert_xml_element_to_array($value, $recursion_depth);
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$recursion_depth--;
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}
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if ($recursion_depth == 0) {
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$temp_array = $result_array;
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$result_array = array(
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strtolower($xml_element_copy->getName()) => $temp_array,
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);
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}
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return ($result_array);
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} else {
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return (trim(strval($xml_element)));
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}
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}}
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// Given an email style address, perform webfinger lookup and
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// return the resulting DFRN profile URL, or if no DFRN profile URL
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// is located, returns an OStatus subscription template (prefixed
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// with the string 'stat:' to identify it as on OStatus template).
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// If this isn't an email style address just return $s.
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// Return an empty string if email-style addresses but webfinger fails,
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// or if the resultant personal XRD doesn't contain a supported
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// subscription/friend-request attribute.
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if(! function_exists('webfinger_dfrn')) {
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function webfinger_dfrn($s) {
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if(! strstr($s,'@')) {
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return $s;
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}
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$links = webfinger($s);
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logger('webfinger_dfrn: ' . $s . ':' . print_r($links,true), LOGGER_DATA);
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if(count($links)) {
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foreach($links as $link)
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if($link['@attributes']['rel'] === NAMESPACE_DFRN)
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return $link['@attributes']['href'];
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foreach($links as $link)
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if($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB)
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return 'stat:' . $link['@attributes']['template'];
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}
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return '';
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}}
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// Given an email style address, perform webfinger lookup and
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// return the array of link attributes from the personal XRD file.
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// On error/failure return an empty array.
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if(! function_exists('webfinger')) {
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function webfinger($s) {
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$host = '';
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if(strstr($s,'@')) {
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$host = substr($s,strpos($s,'@') + 1);
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}
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if(strlen($host)) {
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$tpl = fetch_lrdd_template($host);
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logger('webfinger: lrdd template: ' . $tpl);
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if(strlen($tpl)) {
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$pxrd = str_replace('{uri}', urlencode('acct:' . $s), $tpl);
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logger('webfinger: pxrd: ' . $pxrd);
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$links = fetch_xrd_links($pxrd);
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if(! count($links)) {
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// try with double slashes
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$pxrd = str_replace('{uri}', urlencode('acct://' . $s), $tpl);
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logger('webfinger: pxrd: ' . $pxrd);
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$links = fetch_xrd_links($pxrd);
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}
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return $links;
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}
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}
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return array();
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}}
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if(! function_exists('lrdd')) {
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function lrdd($uri) {
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$a = get_app();
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// default priority is host priority, host-meta first
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$priority = 'host';
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// All we have is an email address. Resource-priority is irrelevant
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// because our URI isn't directly resolvable.
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if(strstr($uri,'@')) {
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return(webfinger($uri));
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}
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// get the host meta file
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$host = @parse_url($uri);
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if($host) {
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$url = ((x($host,'scheme')) ? $host['scheme'] : 'http') . '://';
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$url .= $host['host'] . '/.well-known/host-meta' ;
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}
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else
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return array();
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logger('lrdd: constructed url: ' . $url);
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$xml = fetch_url($url);
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$headers = $a->get_curl_headers();
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if (! $xml)
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return array();
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logger('lrdd: host_meta: ' . $xml, LOGGER_DATA);
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$h = parse_xml_string($xml);
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if(! $h)
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return array();
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$arr = convert_xml_element_to_array($h);
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if(isset($arr['xrd']['property'])) {
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$property = $arr['crd']['property'];
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if(! isset($property[0]))
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$properties = array($property);
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else
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$properties = $property;
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foreach($properties as $prop)
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if((string) $prop['@attributes'] === 'http://lrdd.net/priority/resource')
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$priority = 'resource';
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}
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// save the links in case we need them
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$links = array();
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if(isset($arr['xrd']['link'])) {
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$link = $arr['xrd']['link'];
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if(! isset($link[0]))
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$links = array($link);
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else
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$links = $link;
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}
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// do we have a template or href?
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if(count($links)) {
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foreach($links as $link) {
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if($link['@attributes']['rel'] && attribute_contains($link['@attributes']['rel'],'lrdd')) {
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if(x($link['@attributes'],'template'))
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$tpl = $link['@attributes']['template'];
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elseif(x($link['@attributes'],'href'))
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$href = $link['@attributes']['href'];
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}
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}
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}
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if((! isset($tpl)) || (! strpos($tpl,'{uri}')))
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$tpl = '';
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if($priority === 'host') {
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if(strlen($tpl))
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$pxrd = str_replace('{uri}', urlencode($uri), $tpl);
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elseif(isset($href))
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$pxrd = $href;
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if(isset($pxrd)) {
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logger('lrdd: (host priority) pxrd: ' . $pxrd);
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$links = fetch_xrd_links($pxrd);
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return $links;
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}
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$lines = explode("\n",$headers);
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if(count($lines)) {
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foreach($lines as $line) {
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if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
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return(fetch_xrd_links($matches[1]));
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break;
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}
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}
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}
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}
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// priority 'resource'
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$html = fetch_url($uri);
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$headers = $a->get_curl_headers();
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logger('lrdd: headers=' . $headers, LOGGER_DEBUG);
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// don't try and parse raw xml as html
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if(! strstr($html,'<?xml')) {
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require_once('library/HTML5/Parser.php');
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$dom = @HTML5_Parser::parse($html);
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if($dom) {
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$items = $dom->getElementsByTagName('link');
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foreach($items as $item) {
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$x = $item->getAttribute('rel');
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if($x == "lrdd") {
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$pagelink = $item->getAttribute('href');
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break;
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}
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}
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}
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}
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if(isset($pagelink))
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return(fetch_xrd_links($pagelink));
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// next look in HTTP headers
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$lines = explode("\n",$headers);
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if(count($lines)) {
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foreach($lines as $line) {
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// TODO alter the following regex to support multiple relations (space separated)
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if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
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$pagelink = $matches[1];
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break;
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}
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// don't try and run feeds through the html5 parser
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if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
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return array();
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if(stristr($html,'<rss') || stristr($html,'<feed'))
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return array();
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}
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}
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if(isset($pagelink))
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return(fetch_xrd_links($pagelink));
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// If we haven't found any links, return the host xrd links (which we have already fetched)
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if(isset($links))
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return $links;
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return array();
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}}
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// Given a host name, locate the LRDD template from that
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// host. Returns the LRDD template or an empty string on
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// error/failure.
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if(! function_exists('fetch_lrdd_template')) {
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function fetch_lrdd_template($host) {
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$tpl = '';
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$url1 = 'https://' . $host . '/.well-known/host-meta' ;
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$url2 = 'http://' . $host . '/.well-known/host-meta' ;
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$links = fetch_xrd_links($url1);
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logger('fetch_lrdd_template from: ' . $url1);
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logger('template (https): ' . print_r($links,true));
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if(! count($links)) {
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logger('fetch_lrdd_template from: ' . $url2);
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$links = fetch_xrd_links($url2);
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logger('template (http): ' . print_r($links,true));
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}
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if(count($links)) {
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foreach($links as $link)
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if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd')
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$tpl = $link['@attributes']['template'];
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}
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if(! strpos($tpl,'{uri}'))
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$tpl = '';
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return $tpl;
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}}
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// Given a URL, retrieve the page as an XRD document.
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// Return an array of links.
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// on error/failure return empty array.
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if(! function_exists('fetch_xrd_links')) {
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function fetch_xrd_links($url) {
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$xml = fetch_url($url);
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logger('fetch_xrd_links: ' . $xml, LOGGER_DATA);
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if ((! $xml) || (! stristr($xml,'<xrd')))
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return array();
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$h = parse_xml_string($xml);
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if(! $h)
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return array();
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$arr = convert_xml_element_to_array($h);
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$links = array();
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if(isset($arr['xrd']['link'])) {
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$link = $arr['xrd']['link'];
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if(! isset($link[0]))
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$links = array($link);
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else
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$links = $link;
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}
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if(isset($arr['xrd']['alias'])) {
|
|
$alias = $arr['xrd']['alias'];
|
|
if(! isset($alias[0]))
|
|
$aliases = array($alias);
|
|
else
|
|
$aliases = $alias;
|
|
foreach($aliases as $alias) {
|
|
$links[]['@attributes'] = array('rel' => 'alias' , 'href' => $alias);
|
|
}
|
|
}
|
|
|
|
logger('fetch_xrd_links: ' . print_r($links,true), LOGGER_DATA);
|
|
|
|
return $links;
|
|
|
|
}}
|
|
|
|
|
|
// Take a URL from the wild, prepend http:// if necessary
|
|
// and check DNS to see if it's real
|
|
// return true if it's OK, false if something is wrong with it
|
|
|
|
if(! function_exists('validate_url')) {
|
|
function validate_url(&$url) {
|
|
if(substr($url,0,4) != 'http')
|
|
$url = 'http://' . $url;
|
|
$h = @parse_url($url);
|
|
|
|
if(($h) && (dns_get_record($h['host'], DNS_A + DNS_CNAME + DNS_PTR))) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}}
|
|
|
|
// checks that email is an actual resolvable internet address
|
|
|
|
if(! function_exists('validate_email')) {
|
|
function validate_email($addr) {
|
|
|
|
if(! strpos($addr,'@'))
|
|
return false;
|
|
$h = substr($addr,strpos($addr,'@') + 1);
|
|
|
|
if(($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX))) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}}
|
|
|
|
// Check $url against our list of allowed sites,
|
|
// wildcards allowed. If allowed_sites is unset return true;
|
|
// If url is allowed, return true.
|
|
// otherwise, return false
|
|
|
|
if(! function_exists('allowed_url')) {
|
|
function allowed_url($url) {
|
|
|
|
$h = @parse_url($url);
|
|
|
|
if(! $h) {
|
|
return false;
|
|
}
|
|
|
|
$str_allowed = get_config('system','allowed_sites');
|
|
if(! $str_allowed)
|
|
return true;
|
|
|
|
$found = false;
|
|
|
|
$host = strtolower($h['host']);
|
|
|
|
// always allow our own site
|
|
|
|
if($host == strtolower($_SERVER['SERVER_NAME']))
|
|
return true;
|
|
|
|
$fnmatch = function_exists('fnmatch');
|
|
$allowed = explode(',',$str_allowed);
|
|
|
|
if(count($allowed)) {
|
|
foreach($allowed as $a) {
|
|
$pat = strtolower(trim($a));
|
|
if(($fnmatch && fnmatch($pat,$host)) || ($pat == $host)) {
|
|
$found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return $found;
|
|
}}
|
|
|
|
// check if email address is allowed to register here.
|
|
// Compare against our list (wildcards allowed).
|
|
// Returns false if not allowed, true if allowed or if
|
|
// allowed list is not configured.
|
|
|
|
if(! function_exists('allowed_email')) {
|
|
function allowed_email($email) {
|
|
|
|
|
|
$domain = strtolower(substr($email,strpos($email,'@') + 1));
|
|
if(! $domain)
|
|
return false;
|
|
|
|
$str_allowed = get_config('system','allowed_email');
|
|
if(! $str_allowed)
|
|
return true;
|
|
|
|
$found = false;
|
|
|
|
$fnmatch = function_exists('fnmatch');
|
|
$allowed = explode(',',$str_allowed);
|
|
|
|
if(count($allowed)) {
|
|
foreach($allowed as $a) {
|
|
$pat = strtolower(trim($a));
|
|
if(($fnmatch && fnmatch($pat,$domain)) || ($pat == $domain)) {
|
|
$found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return $found;
|
|
}}
|
|
|
|
|
|
if(! function_exists('gravatar_img')) {
|
|
function gravatar_img($email) {
|
|
$size = 175;
|
|
$opt = 'identicon'; // psuedo-random geometric pattern if not found
|
|
$rating = 'pg';
|
|
$hash = md5(trim(strtolower($email)));
|
|
|
|
$url = 'http://www.gravatar.com/avatar/' . $hash . '.jpg'
|
|
. '?s=' . $size . '&d=' . $opt . '&r=' . $rating;
|
|
|
|
logger('gravatar: ' . $email . ' ' . $url);
|
|
return $url;
|
|
}}
|
|
|
|
|
|
if(! function_exists('parse_xml_string')) {
|
|
function parse_xml_string($s,$strict = true) {
|
|
if($strict) {
|
|
if(! strstr($s,'<?xml'))
|
|
return false;
|
|
$s2 = substr($s,strpos($s,'<?xml'));
|
|
}
|
|
else
|
|
$s2 = $s;
|
|
libxml_use_internal_errors(true);
|
|
|
|
$x = @simplexml_load_string($s2);
|
|
if(! $x) {
|
|
logger('libxml: parse: error: ' . $s2, LOGGER_DATA);
|
|
foreach(libxml_get_errors() as $err)
|
|
logger('libxml: parse: ' . $err->code." at ".$err->line.":".$err->column." : ".$err->message, LOGGER_DATA);
|
|
libxml_clear_errors();
|
|
}
|
|
return $x;
|
|
}}
|