Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file include/network.php
*/
require_once("include/xml.php");
/**
* @brief Curl wrapper
*
* If binary flag is true, return binary results.
* Set the cookiejar argument to a string (e.g. "/tmp/friendica-cookies.txt")
* to preserve cookies from one request to the next.
*
* @param string $url URL to fetch
* @param boolean $binary default false
* TRUE if asked to return binary results (file download)
* @param integer $redirects The recursion counter for internal use - default 0
* @param integer $timeout Timeout in seconds, default system config value or 60 seconds
* @param string $accept_content supply Accept: header with 'accept_content' as the value
* @param string $cookiejar Path to cookie jar file
*
* @return string The fetched content
*/
function fetch_url($url,$binary = false, &$redirects = 0, $timeout = 0, $accept_content=Null, $cookiejar = 0) {
$ret = z_fetch_url(
$url,
$binary,
$redirects,
array('timeout'=>$timeout,
'accept_content'=>$accept_content,
'cookiejar'=>$cookiejar
));
return($ret['body']);
}
/**
* @brief fetches an URL.
*
* @param string $url URL to fetch
* @param boolean $binary default false
* TRUE if asked to return binary results (file download)
* @param int $redirects The recursion counter for internal use - default 0
* @param array $opts (optional parameters) assoziative array with:
* 'accept_content' => supply Accept: header with 'accept_content' as the value
* 'timeout' => int Timeout in seconds, default system config value or 60 seconds
* 'http_auth' => username:password
* 'novalidate' => do not validate SSL certs, default is to validate using our CA list
* 'nobody' => only return the header
* 'cookiejar' => path to cookie jar file
*
* @return array an assoziative array with:
* int 'return_code' => HTTP return code or 0 if timeout or failure
* boolean 'success' => boolean true (if HTTP 2xx result) or false
* string 'redirect_url' => in case of redirect, content was finally retrieved from this URL
* string 'header' => HTTP headers
* string 'body' => fetched content
*/
function z_fetch_url($url,$binary = false, &$redirects = 0, $opts=array()) {
$ret = array('return_code' => 0, 'success' => false, 'header' => "", 'body' => "");
$stamp1 = microtime(true);
$a = get_app();
$ch = @curl_init($url);
if(($redirects > 8) || (! $ch))
return false;
@curl_setopt($ch, CURLOPT_HEADER, true);
if(x($opts,"cookiejar")) {
curl_setopt($ch, CURLOPT_COOKIEJAR, $opts["cookiejar"]);
curl_setopt($ch, CURLOPT_COOKIEFILE, $opts["cookiejar"]);
}
// These settings aren't needed. We're following the location already.
// @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// @curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
if (x($opts,'accept_content')){
curl_setopt($ch,CURLOPT_HTTPHEADER, array (
"Accept: " . $opts['accept_content']
));
}
@curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
if(x($opts,'headers')){
@curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
}
if(x($opts,'nobody')){
@curl_setopt($ch, CURLOPT_NOBODY, $opts['nobody']);
}
if(x($opts,'timeout')){
@curl_setopt($ch, CURLOPT_TIMEOUT, $opts['timeout']);
} else {
$curl_time = intval(get_config('system','curl_timeout'));
@curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
}
// by default we will allow self-signed certs
// but you can override this
$check_cert = get_config('system','verifyssl');
@curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
@curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
$prx = get_config('system','proxy');
if(strlen($prx)) {
@curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
@curl_setopt($ch, CURLOPT_PROXY, $prx);
$prxusr = @get_config('system','proxyuser');
if(strlen($prxusr))
@curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
}
if($binary)
@curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
$a->set_curl_code(0);
// don't let curl abort the entire application
// if it throws any errors.
$s = @curl_exec($ch);
if (curl_errno($ch) !== CURLE_OK) {
logger('fetch_url error fetching '.$url.': '.curl_error($ch), LOGGER_NORMAL);
}
$base = $s;
$curl_info = @curl_getinfo($ch);
$http_code = $curl_info['http_code'];
logger('fetch_url '.$url.': '.$http_code." ".$s, LOGGER_DATA);
$header = '';
// Pull out multiple headers, e.g. proxy and continuation headers
// allow for HTTP/2.x without fixing code
while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) {
$chunk = substr($base,0,strpos($base,"\r\n\r\n")+4);
$header .= $chunk;
$base = substr($base,strlen($chunk));
}
$a->set_curl_code($http_code);
$a->set_curl_content_type($curl_info['content_type']);
$a->set_curl_headers($header);
if($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
$new_location_info = @parse_url($curl_info["redirect_url"]);
$old_location_info = @parse_url($curl_info["url"]);
$newurl = $curl_info["redirect_url"];
if (($new_location_info["path"] == "") AND ($new_location_info["host"] != ""))
$newurl = $new_location_info["scheme"]."://".$new_location_info["host"].$old_location_info["path"];
$matches = array();
if (preg_match('/(Location:|URI:)(.*?)\n/i', $header, $matches)) {
$newurl = trim(array_pop($matches));
}
if(strpos($newurl,'/') === 0)
$newurl = $old_location_info["scheme"]."://".$old_location_info["host"].$newurl;
if (filter_var($newurl, FILTER_VALIDATE_URL)) {
$redirects++;
@curl_close($ch);
return z_fetch_url($newurl,$binary, $redirects, $opts);
}
}
$a->set_curl_code($http_code);
$a->set_curl_content_type($curl_info['content_type']);
$body = substr($s,strlen($header));
$rc = intval($http_code);
$ret['return_code'] = $rc;
$ret['success'] = (($rc >= 200 && $rc <= 299) ? true : false);
$ret['redirect_url'] = $url;
if(! $ret['success']) {
$ret['error'] = curl_error($ch);
$ret['debug'] = $curl_info;
logger('z_fetch_url: error: ' . $url . ': ' . $ret['error'], LOGGER_DEBUG);
logger('z_fetch_url: debug: ' . print_r($curl_info,true), LOGGER_DATA);
}
$ret['body'] = substr($s,strlen($header));
$ret['header'] = $header;
if(x($opts,'debug')) {
$ret['debug'] = $curl_info;
}
@curl_close($ch);
$a->save_timestamp($stamp1, "network");
return($ret);
}
// post request to $url. $params is an array of post variables.
/**
* @brief Post request to $url
*
* @param string $url URL to post
* @param mixed $params
* @param string $headers HTTP headers
* @param integer $redirects Recursion counter for internal use - default = 0
* @param integer $timeout The timeout in seconds, default system config value or 60 seconds
*
* @return string The content
*/
function post_url($url,$params, $headers = null, &$redirects = 0, $timeout = 0) {
$stamp1 = microtime(true);
$a = get_app();
$ch = curl_init($url);
if(($redirects > 8) || (! $ch))
return false;
logger("post_url: start ".$url, LOGGER_DATA);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_POST,1);
curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
if(intval($timeout)) {
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
}
else {
$curl_time = intval(get_config('system','curl_timeout'));
curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
}
if(defined('LIGHTTPD')) {
if(!is_array($headers)) {
$headers = array('Expect:');
} else {
if(!in_array('Expect:', $headers)) {
array_push($headers, 'Expect:');
}
}
}
if($headers)
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$check_cert = get_config('system','verifyssl');
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, (($check_cert) ? 2 : false));
$prx = get_config('system','proxy');
if(strlen($prx)) {
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
curl_setopt($ch, CURLOPT_PROXY, $prx);
$prxusr = get_config('system','proxyuser');
if(strlen($prxusr))
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
}
$a->set_curl_code(0);
// don't let curl abort the entire application
// if it throws any errors.
$s = @curl_exec($ch);
$base = $s;
$curl_info = curl_getinfo($ch);
$http_code = $curl_info['http_code'];
logger("post_url: result ".$http_code." - ".$url, LOGGER_DATA);
$header = '';
// Pull out multiple headers, e.g. proxy and continuation headers
// allow for HTTP/2.x without fixing code
while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) {
$chunk = substr($base,0,strpos($base,"\r\n\r\n")+4);
$header .= $chunk;
$base = substr($base,strlen($chunk));
}
if($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
$matches = array();
preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
$newurl = trim(array_pop($matches));
if(strpos($newurl,'/') === 0)
$newurl = $old_location_info["scheme"] . "://" . $old_location_info["host"] . $newurl;
if (filter_var($newurl, FILTER_VALIDATE_URL)) {
$redirects++;
logger("post_url: redirect ".$url." to ".$newurl);
return post_url($newurl,$params, $headers, $redirects, $timeout);
//return fetch_url($newurl,false,$redirects,$timeout);
}
}
$a->set_curl_code($http_code);
$body = substr($s,strlen($header));
$a->set_curl_headers($header);
curl_close($ch);
$a->save_timestamp($stamp1, "network");
logger("post_url: end ".$url, LOGGER_DATA);
return($body);
}
// Generic XML return
// Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
// of $st and an optional text <message> of $message and terminates the current process.
function xml_status($st, $message = '') {
$xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : '');
if($st)
logger('xml_status returning non_zero: ' . $st . " message=" . $message);
header( "Content-type: text/xml" );
echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n";
echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n";
killme();
}
/**
* @brief Send HTTP status header and exit.
*
* @param integer $val HTTP status result value
* @param array $description optional message
* 'title' => header title
* 'description' => optional message
*/
function http_status_exit($val, $description = array()) {
$err = '';
if($val >= 400) {
$err = 'Error';
if (!isset($description["title"]))
$description["title"] = $err." ".$val;
}
if($val >= 200 && $val < 300)
$err = 'OK';
logger('http_status_exit ' . $val);
header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
if (isset($description["title"])) {
$tpl = get_markup_template('http_status.tpl');
echo replace_macros($tpl, array('$title' => $description["title"],
'$description' => $description["description"]));
}
killme();
}
// Given an email style address, perform webfinger lookup and
// return the resulting DFRN profile URL, or if no DFRN profile URL
// is located, returns an OStatus subscription template (prefixed
// with the string 'stat:' to identify it as on OStatus template).
// If this isn't an email style address just return $webbie.
// Return an empty string if email-style addresses but webfinger fails,
// or if the resultant personal XRD doesn't contain a supported
// subscription/friend-request attribute.
// amended 7/9/2011 to return an hcard which could save potentially loading
// a lengthy content page to scrape dfrn attributes
function webfinger_dfrn($webbie,&$hcard) {
if(! strstr($webbie,'@')) {
return $webbie;
}
$profile_link = '';
$links = webfinger($webbie);
logger('webfinger_dfrn: ' . $webbie . ':' . print_r($links,true), LOGGER_DATA);
if(count($links)) {
foreach($links as $link) {
if($link['@attributes']['rel'] === NAMESPACE_DFRN)
$profile_link = $link['@attributes']['href'];
if($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB)
$profile_link = 'stat:' . $link['@attributes']['template'];
if($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
$hcard = $link['@attributes']['href'];
}
}
return $profile_link;
}
/**
* @brief Perform webfinger lookup on an email style address
*
* @param string $webbi An email style address
* @param boolean $debug
*
* @return array of link attributes from the personal XRD file
* empty array on error/failure
*/
function webfinger($webbie, $debug = false) {
$host = '';
if(strstr($webbie,'@')) {
$host = substr($webbie,strpos($webbie,'@') + 1);
}
if(strlen($host)) {
$tpl = fetch_lrdd_template($host);
logger('webfinger: lrdd template: ' . $tpl);
if(strlen($tpl)) {
$pxrd = str_replace('{uri}', urlencode('acct:' . $webbie), $tpl);
logger('webfinger: pxrd: ' . $pxrd);
$links = fetch_xrd_links($pxrd);
if(! count($links)) {
// try with double slashes
$pxrd = str_replace('{uri}', urlencode('acct://' . $webbie), $tpl);
logger('webfinger: pxrd: ' . $pxrd);
$links = fetch_xrd_links($pxrd);
}
return $links;
}
}
return array();
}
function lrdd($uri, $debug = false) {
$a = get_app();
// default priority is host priority, host-meta first
$priority = 'host';
// All we have is an email address. Resource-priority is irrelevant
// because our URI isn't directly resolvable.
if(strstr($uri,'@')) {
return(webfinger($uri));
}
// get the host meta file
$host = @parse_url($uri);
if($host) {
$url = ((x($host,'scheme')) ? $host['scheme'] : 'http') . '://';
$url .= $host['host'] . '/.well-known/host-meta' ;
}
else
return array();
logger('lrdd: constructed url: ' . $url);
$xml = fetch_url($url);
$headers = $a->get_curl_headers();
if (! $xml)
return array();
logger('lrdd: host_meta: ' . $xml, LOGGER_DATA);
if(! stristr($xml,'<xrd'))
return array();
$h = parse_xml_string($xml);
if(! $h)
return array();
$arr = xml::element_to_array($h);
if(isset($arr['xrd']['property'])) {
$property = $arr['crd']['property'];
if(! isset($property[0]))
$properties = array($property);
else
$properties = $property;
foreach($properties as $prop)
if((string) $prop['@attributes'] === 'http://lrdd.net/priority/resource')
$priority = 'resource';
}
// save the links in case we need them
$links = array();
if(isset($arr['xrd']['link'])) {
$link = $arr['xrd']['link'];
if(! isset($link[0]))
$links = array($link);
else
$links = $link;
}
// do we have a template or href?
if(count($links)) {
foreach($links as $link) {
if($link['@attributes']['rel'] && attribute_contains($link['@attributes']['rel'],'lrdd')) {
if(x($link['@attributes'],'template'))
$tpl = $link['@attributes']['template'];
elseif(x($link['@attributes'],'href'))
$href = $link['@attributes']['href'];
}
}
}
if((! isset($tpl)) || (! strpos($tpl,'{uri}')))
$tpl = '';
if($priority === 'host') {
if(strlen($tpl))
$pxrd = str_replace('{uri}', urlencode($uri), $tpl);
elseif(isset($href))
$pxrd = $href;
if(isset($pxrd)) {
logger('lrdd: (host priority) pxrd: ' . $pxrd);
$links = fetch_xrd_links($pxrd);
return $links;
}
$lines = explode("\n",$headers);
if(count($lines)) {
foreach($lines as $line) {
if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
return(fetch_xrd_links($matches[1]));
break;
}
}
}
}
// priority 'resource'
$html = fetch_url($uri);
$headers = $a->get_curl_headers();
logger('lrdd: headers=' . $headers, LOGGER_DEBUG);
// don't try and parse raw xml as html
if(! strstr($html,'<?xml')) {
require_once('library/HTML5/Parser.php');
try {
$dom = HTML5_Parser::parse($html);
} catch (DOMException $e) {
logger('lrdd: parse error: ' . $e);
}
if(isset($dom) && $dom) {
$items = $dom->getElementsByTagName('link');
foreach($items as $item) {
$x = $item->getAttribute('rel');
if($x == "lrdd") {
$pagelink = $item->getAttribute('href');
break;
}
}
}
}
if(isset($pagelink))
return(fetch_xrd_links($pagelink));
// next look in HTTP headers
$lines = explode("\n",$headers);
if(count($lines)) {
foreach($lines as $line) {
/// @TODO Alter the following regex to support multiple relations (space separated)
if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
$pagelink = $matches[1];
break;
}
// don't try and run feeds through the html5 parser
if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
return array();
if(stristr($html,'<rss') || stristr($html,'<feed'))
return array();
}
}
if(isset($pagelink))
return(fetch_xrd_links($pagelink));
// If we haven't found any links, return the host xrd links (which we have already fetched)
if(isset($links))
return $links;
return array();
}
// Given a host name, locate the LRDD template from that
// host. Returns the LRDD template or an empty string on
// error/failure.
function fetch_lrdd_template($host) {
$tpl = '';
$url1 = 'https://' . $host . '/.well-known/host-meta' ;
$url2 = 'http://' . $host . '/.well-known/host-meta' ;
$links = fetch_xrd_links($url1);
logger('fetch_lrdd_template from: ' . $url1);
logger('template (https): ' . print_r($links,true));
if(! count($links)) {
logger('fetch_lrdd_template from: ' . $url2);
$links = fetch_xrd_links($url2);
logger('template (http): ' . print_r($links,true));
}
if(count($links)) {
foreach($links as $link)
if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd' && (!$link['@attributes']['type'] || $link['@attributes']['type'] === 'application/xrd+xml'))
$tpl = $link['@attributes']['template'];
}
if(! strpos($tpl,'{uri}'))
$tpl = '';
return $tpl;
}
/**
* @brief Given a URL, retrieve the page as an XRD document.
*
* @param string $url An url
* @return array of links
* return empty array on error/failure
*/
function fetch_xrd_links($url) {
$xrd_timeout = intval(get_config('system','xrd_timeout'));
$redirects = 0;
$xml = fetch_url($url,false,$redirects,(($xrd_timeout) ? $xrd_timeout : 20), "application/xrd+xml");
logger('fetch_xrd_links: ' . $xml, LOGGER_DATA);
if ((! $xml) || (! stristr($xml,'<xrd')))
return array();
// fix diaspora's bad xml
$xml = str_replace(array('href=&quot;','&quot;/>'),array('href="','"/>'),$xml);
$h = parse_xml_string($xml);
if(! $h)
return array();
$arr = xml::element_to_array($h);
$links = array();
if(isset($arr['xrd']['link'])) {
$link = $arr['xrd']['link'];
if(! isset($link[0]))
$links = array($link);
else
$links = $link;
}
if(isset($arr['xrd']['alias'])) {
$alias = $arr['xrd']['alias'];
if(! isset($alias[0]))
$aliases = array($alias);
else
$aliases = $alias;
if(is_array($aliases) && count($aliases)) {
foreach($aliases as $alias) {
$links[]['@attributes'] = array('rel' => 'alias' , 'href' => $alias);
}
}
}
logger('fetch_xrd_links: ' . print_r($links,true), LOGGER_DATA);
return $links;
}
/**
* @brief Check URL to se if ts's real
*
* Take a URL from the wild, prepend http:// if necessary
* and check DNS to see if it's real (or check if is a valid IP address)
*
* @param string $url The URL to be validated
* @return boolean True if it's a valid URL, fals if something wrong with it
*/
function validate_url(&$url) {
if(get_config('system','disable_url_validation'))
return true;
// no naked subdomains (allow localhost for tests)
if(strpos($url,'.') === false && strpos($url,'/localhost/') === false)
return false;
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) || filter_var($h['host'], FILTER_VALIDATE_IP) )) {
return true;
}
return false;
}
/**
* @brief Checks that email is an actual resolvable internet address
*
* @param string $addr The email address
* @return boolean True if it's a valid email address, false if it's not
*/
function validate_email($addr) {
if(get_config('system','disable_email_validation'))
return true;
if(! strpos($addr,'@'))
return false;
$h = substr($addr,strpos($addr,'@') + 1);
if(($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP) )) {
return true;
}
return false;
}
/**
* @brief Check if URL is allowed
*
* Check $url against our list of allowed sites,
* wildcards allowed. If allowed_sites is unset return true;
*
* @param string $url URL which get tested
* @return boolean True if url is allowed otherwise return false
*/
function allowed_url($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;
}
/**
* @brief Check if email address is allowed to register here.
*
* Compare against our list (wildcards allowed).
*
* @param type $email
* @return boolean False if not allowed, true if allowed
* or if allowed list is not configured
*/
function allowed_email($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 $found;
}
function avatar_img($email) {
$a = get_app();
$avatar['size'] = 175;
$avatar['email'] = $email;
$avatar['url'] = '';
$avatar['success'] = false;
call_hooks('avatar_lookup', $avatar);
if(! $avatar['success'])
$avatar['url'] = $a->get_baseurl() . '/images/person-175.jpg';
logger('Avatar: ' . $avatar['email'] . ' ' . $avatar['url'], LOGGER_DEBUG);
return $avatar['url'];
}
function parse_xml_string($s,$strict = true) {
/// @todo Move this function to the xml class
if($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 $x;
}
function scale_external_images($srctext, $include_link = true, $scale_replace = false) {
// Suppress "view full size"
if (intval(get_config('system','no_view_full_size')))
$include_link = false;
$a = get_app();
// Picture addresses can contain special characters
$s = htmlspecialchars_decode($srctext);
$matches = null;
$c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism',$s,$matches,PREG_SET_ORDER);
if($c) {
require_once('include/Photo.php');
foreach($matches as $mtch) {
logger('scale_external_image: ' . $mtch[1]);
$hostname = str_replace('www.','',substr($a->get_baseurl(),strpos($a->get_baseurl(),'://')+3));
if(stristr($mtch[1],$hostname))
continue;
// $scale_replace, if passed, is an array of two elements. The
// first is the name of the full-size image. The second is the
// name of a remote, scaled-down version of the full size image.
// This allows Friendica to display the smaller remote image if
// one exists, while still linking to the full-size image
if($scale_replace)
$scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
else
$scaled = $mtch[1];
$i = @fetch_url($scaled);
if(! $i)
return $srctext;
// guess mimetype from headers or filename
$type = guess_image_type($mtch[1],true);
if($i) {
$ph = new Photo($i, $type);
if($ph->is_valid()) {
$orig_width = $ph->getWidth();
$orig_height = $ph->getHeight();
if($orig_width > 640 || $orig_height > 640) {
$ph->scaleImage(640);
$new_width = $ph->getWidth();
$new_height = $ph->getHeight();
logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
$s = str_replace($mtch[0],'[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
. "\n" . (($include_link)
? '[url=' . $mtch[1] . ']' . t('view full size') . '[/url]' . "\n"
: ''),$s);
logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
}
}
}
}
}
// replace the special char encoding
$s = htmlspecialchars($s,ENT_NOQUOTES,'UTF-8');
return $s;
}
function fix_contact_ssl_policy(&$contact,$new_policy) {
$ssl_changed = false;
if((intval($new_policy) == SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'],'https:')) {
$ssl_changed = true;
$contact['url'] = str_replace('https:','http:',$contact['url']);
$contact['request'] = str_replace('https:','http:',$contact['request']);
$contact['notify'] = str_replace('https:','http:',$contact['notify']);
$contact['poll'] = str_replace('https:','http:',$contact['poll']);
$contact['confirm'] = str_replace('https:','http:',$contact['confirm']);
$contact['poco'] = str_replace('https:','http:',$contact['poco']);
}
if((intval($new_policy) == SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'],'http:')) {
$ssl_changed = true;
$contact['url'] = str_replace('http:','https:',$contact['url']);
$contact['request'] = str_replace('http:','https:',$contact['request']);
$contact['notify'] = str_replace('http:','https:',$contact['notify']);
$contact['poll'] = str_replace('http:','https:',$contact['poll']);
$contact['confirm'] = str_replace('http:','https:',$contact['confirm']);
$contact['poco'] = str_replace('http:','https:',$contact['poco']);
}
if($ssl_changed) {
q("update contact set
url = '%s',
request = '%s',
notify = '%s',
poll = '%s',
confirm = '%s',
poco = '%s'
where id = %d limit 1",
dbesc($contact['url']),
dbesc($contact['request']),
dbesc($contact['notify']),
dbesc($contact['poll']),
dbesc($contact['confirm']),
dbesc($contact['poco']),
intval($contact['id'])
);
}
}
function original_url($url, $depth=1, $fetchbody = false) {
$a = get_app();
// Remove Analytics Data from Google and other tracking platforms
$urldata = parse_url($url);
if (is_string($urldata["query"])) {
$query = $urldata["query"];
parse_str($query, $querydata);
if (is_array($querydata))
foreach ($querydata AS $param=>$value)
if (in_array($param, array("utm_source", "utm_medium", "utm_term", "utm_content", "utm_campaign",
"wt_mc", "pk_campaign", "pk_kwd", "mc_cid", "mc_eid",
"fb_action_ids", "fb_action_types", "fb_ref",
"awesm", "wtrid",
"woo_campaign", "woo_source", "woo_medium", "woo_content", "woo_term"))) {
$pair = $param."=".urlencode($value);
$url = str_replace($pair, "", $url);
// Second try: if the url isn't encoded completely
$pair = $param."=".str_replace(" ", "+", $value);
$url = str_replace($pair, "", $url);
// Third try: Maybey the url isn't encoded at all
$pair = $param."=".$value;
$url = str_replace($pair, "", $url);
$url = str_replace(array("?&", "&&"), array("?", ""), $url);
}
if (substr($url, -1, 1) == "?")
$url = substr($url, 0, -1);
}
if ($depth > 10)
return($url);
$url = trim($url, "'");
$stamp1 = microtime(true);
$siteinfo = array();
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
$header = curl_exec($ch);
$curl_info = @curl_getinfo($ch);
$http_code = $curl_info['http_code'];
curl_close($ch);
$a->save_timestamp($stamp1, "network");
if ($http_code == 0)
return($url);
if ((($curl_info['http_code'] == "301") OR ($curl_info['http_code'] == "302"))
AND (($curl_info['redirect_url'] != "") OR ($curl_info['location'] != ""))) {
if ($curl_info['redirect_url'] != "")
return(original_url($curl_info['redirect_url'], ++$depth, $fetchbody));
else
return(original_url($curl_info['location'], ++$depth, $fetchbody));
}
// Check for redirects in the meta elements of the body if there are no redirects in the header.
if (!$fetchbody)
return(original_url($url, ++$depth, true));
// if the file is too large then exit
if ($curl_info["download_content_length"] > 1000000)
return($url);
// if it isn't a HTML file then exit
if (($curl_info["content_type"] != "") AND !strstr(strtolower($curl_info["content_type"]),"html"))
return($url);
$stamp1 = microtime(true);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_NOBODY, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
$body = curl_exec($ch);
curl_close($ch);
$a->save_timestamp($stamp1, "network");
if (trim($body) == "")
return($url);
// Check for redirect in meta elements
$doc = new DOMDocument();
@$doc->loadHTML($body);
$xpath = new DomXPath($doc);
$list = $xpath->query("//meta[@content]");
foreach ($list as $node) {
$attr = array();
if ($node->attributes->length)
foreach ($node->attributes as $attribute)
$attr[$attribute->name] = $attribute->value;
if (@$attr["http-equiv"] == 'refresh') {
$path = $attr["content"];
$pathinfo = explode(";", $path);
$content = "";
foreach ($pathinfo AS $value)
if (substr(strtolower($value), 0, 4) == "url=")
return(original_url(substr($value, 4), ++$depth));
}
}
return($url);
}
function short_link($url) {
require_once('library/slinky.php');
$slinky = new Slinky($url);
$yourls_url = get_config('yourls','url1');
if ($yourls_url) {
$yourls_username = get_config('yourls','username1');
$yourls_password = get_config('yourls', 'password1');
$yourls_ssl = get_config('yourls', 'ssl1');
$yourls = new Slinky_YourLS();
$yourls->set('username', $yourls_username);
$yourls->set('password', $yourls_password);
$yourls->set('ssl', $yourls_ssl);
$yourls->set('yourls-url', $yourls_url);
$slinky->set_cascade( array($yourls, new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL()));
} else {
// setup a cascade of shortening services
// try to get a short link from these services
// in the order ur1.ca, trim, id.gd, tinyurl
$slinky->set_cascade(array(new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL()));
}
return $slinky->short();
}
/**
* @brief Encodes content to json
*
* This function encodes an array to json format
* and adds an application/json HTTP header to the output.
* After finishing the process is getting killed.
*
* @param array $x The input content
*/
function json_return_and_die($x) {
header("content-type: application/json");
echo json_encode($x);
killme();
}