4 * @file include/network.php
7 use \Friendica\Core\Config;
9 require_once("include/xml.php");
10 require_once('include/Probe.php');
15 * If binary flag is true, return binary results.
16 * Set the cookiejar argument to a string (e.g. "/tmp/friendica-cookies.txt")
17 * to preserve cookies from one request to the next.
19 * @param string $url URL to fetch
20 * @param boolean $binary default false
21 * TRUE if asked to return binary results (file download)
22 * @param integer $redirects The recursion counter for internal use - default 0
23 * @param integer $timeout Timeout in seconds, default system config value or 60 seconds
24 * @param string $accept_content supply Accept: header with 'accept_content' as the value
25 * @param string $cookiejar Path to cookie jar file
27 * @return string The fetched content
29 function fetch_url($url,$binary = false, &$redirects = 0, $timeout = 0, $accept_content=Null, $cookiejar = 0) {
35 array('timeout'=>$timeout,
36 'accept_content'=>$accept_content,
37 'cookiejar'=>$cookiejar
44 * @brief fetches an URL.
46 * @param string $url URL to fetch
47 * @param boolean $binary default false
48 * TRUE if asked to return binary results (file download)
49 * @param int $redirects The recursion counter for internal use - default 0
50 * @param array $opts (optional parameters) assoziative array with:
51 * 'accept_content' => supply Accept: header with 'accept_content' as the value
52 * 'timeout' => int Timeout in seconds, default system config value or 60 seconds
53 * 'http_auth' => username:password
54 * 'novalidate' => do not validate SSL certs, default is to validate using our CA list
55 * 'nobody' => only return the header
56 * 'cookiejar' => path to cookie jar file
58 * @return array an assoziative array with:
59 * int 'return_code' => HTTP return code or 0 if timeout or failure
60 * boolean 'success' => boolean true (if HTTP 2xx result) or false
61 * string 'redirect_url' => in case of redirect, content was finally retrieved from this URL
62 * string 'header' => HTTP headers
63 * string 'body' => fetched content
65 function z_fetch_url($url, $binary = false, &$redirects = 0, $opts = array()) {
66 $ret = array('return_code' => 0, 'success' => false, 'header' => '', 'body' => '');
68 $stamp1 = microtime(true);
72 if (blocked_url($url)) {
73 logger('z_fetch_url: domain of ' . $url . ' is blocked', LOGGER_DATA);
77 $ch = @curl_init($url);
79 if (($redirects > 8) || (!$ch)) {
83 @curl_setopt($ch, CURLOPT_HEADER, true);
85 if (x($opts, "cookiejar")) {
86 curl_setopt($ch, CURLOPT_COOKIEJAR, $opts["cookiejar"]);
87 curl_setopt($ch, CURLOPT_COOKIEFILE, $opts["cookiejar"]);
90 // These settings aren't needed. We're following the location already.
91 // @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
92 // @curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
94 if (x($opts, 'accept_content')) {
95 curl_setopt($ch, CURLOPT_HTTPHEADER, array(
96 'Accept: ' . $opts['accept_content']
100 @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
101 @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
103 $range = intval(Config::get('system', 'curl_range_bytes', 0));
106 @curl_setopt($ch, CURLOPT_RANGE, '0-' . $range);
109 if (x($opts, 'headers')) {
110 @curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
113 if (x($opts, 'nobody')) {
114 @curl_setopt($ch, CURLOPT_NOBODY, $opts['nobody']);
117 if (x($opts, 'timeout')) {
118 @curl_setopt($ch, CURLOPT_TIMEOUT, $opts['timeout']);
120 $curl_time = intval(get_config('system', 'curl_timeout'));
121 @curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
124 // by default we will allow self-signed certs
125 // but you can override this
127 $check_cert = get_config('system', 'verifyssl');
128 @curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
131 @curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
134 $proxy = get_config('system', 'proxy');
136 if (strlen($proxy)) {
137 @curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
138 @curl_setopt($ch, CURLOPT_PROXY, $proxy);
139 $proxyuser = @get_config('system', 'proxyuser');
141 if (strlen($proxyuser)) {
142 @curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
147 @curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
150 $a->set_curl_code(0);
152 // don't let curl abort the entire application
153 // if it throws any errors.
155 $s = @curl_exec($ch);
157 if (curl_errno($ch) !== CURLE_OK) {
158 logger('fetch_url error fetching ' . $url . ': ' . curl_error($ch), LOGGER_NORMAL);
161 $ret['errno'] = curl_errno($ch);
164 $curl_info = @curl_getinfo($ch);
166 $http_code = $curl_info['http_code'];
167 logger('fetch_url ' . $url . ': ' . $http_code . " " . $s, LOGGER_DATA);
170 // Pull out multiple headers, e.g. proxy and continuation headers
171 // allow for HTTP/2.x without fixing code
173 while (preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/', $base)) {
174 $chunk = substr($base, 0, strpos($base, "\r\n\r\n") + 4);
176 $base = substr($base, strlen($chunk));
179 $a->set_curl_code($http_code);
180 $a->set_curl_content_type($curl_info['content_type']);
181 $a->set_curl_headers($header);
183 if ($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
184 $new_location_info = @parse_url($curl_info['redirect_url']);
185 $old_location_info = @parse_url($curl_info['url']);
187 $newurl = $curl_info['redirect_url'];
189 if (($new_location_info['path'] == '') AND ( $new_location_info['host'] != '')) {
190 $newurl = $new_location_info['scheme'] . '://' . $new_location_info['host'] . $old_location_info['path'];
195 if (preg_match('/(Location:|URI:)(.*?)\n/i', $header, $matches)) {
196 $newurl = trim(array_pop($matches));
199 if (strpos($newurl, '/') === 0) {
200 $newurl = $old_location_info['scheme'] . '://' . $old_location_info['host'] . $newurl;
203 if (filter_var($newurl, FILTER_VALIDATE_URL)) {
206 return z_fetch_url($newurl, $binary, $redirects, $opts);
210 $a->set_curl_code($http_code);
211 $a->set_curl_content_type($curl_info['content_type']);
213 $body = substr($s, strlen($header));
215 $rc = intval($http_code);
216 $ret['return_code'] = $rc;
217 $ret['success'] = (($rc >= 200 && $rc <= 299) ? true : false);
218 $ret['redirect_url'] = $url;
220 if (!$ret['success']) {
221 $ret['error'] = curl_error($ch);
222 $ret['debug'] = $curl_info;
223 logger('z_fetch_url: error: ' . $url . ': ' . $ret['error'], LOGGER_DEBUG);
224 logger('z_fetch_url: debug: ' . print_r($curl_info, true), LOGGER_DATA);
227 $ret['body'] = substr($s, strlen($header));
228 $ret['header'] = $header;
230 if (x($opts, 'debug')) {
231 $ret['debug'] = $curl_info;
236 $a->save_timestamp($stamp1, 'network');
242 * @brief Send POST request to $url
244 * @param string $url URL to post
245 * @param mixed $params array of POST variables
246 * @param string $headers HTTP headers
247 * @param integer $redirects Recursion counter for internal use - default = 0
248 * @param integer $timeout The timeout in seconds, default system config value or 60 seconds
250 * @return string The content
252 function post_url($url, $params, $headers = null, &$redirects = 0, $timeout = 0) {
253 $stamp1 = microtime(true);
255 if (blocked_url($url)) {
256 logger('post_url: domain of ' . $url . ' is blocked', LOGGER_DATA);
261 $ch = curl_init($url);
263 if (($redirects > 8) || (!$ch)) {
267 logger('post_url: start ' . $url, LOGGER_DATA);
269 curl_setopt($ch, CURLOPT_HEADER, true);
270 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
271 curl_setopt($ch, CURLOPT_POST, 1);
272 curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
273 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
275 if (intval($timeout)) {
276 curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
278 $curl_time = intval(get_config('system', 'curl_timeout'));
279 curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
282 if (defined('LIGHTTPD')) {
283 if (!is_array($headers)) {
284 $headers = array('Expect:');
286 if (!in_array('Expect:', $headers)) {
287 array_push($headers, 'Expect:');
293 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
296 $check_cert = get_config('system', 'verifyssl');
297 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
300 @curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
303 $proxy = get_config('system', 'proxy');
305 if (strlen($proxy)) {
306 curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
307 curl_setopt($ch, CURLOPT_PROXY, $proxy);
308 $proxyuser = get_config('system', 'proxyuser');
309 if (strlen($proxyuser)) {
310 curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
314 $a->set_curl_code(0);
316 // don't let curl abort the entire application
317 // if it throws any errors.
319 $s = @curl_exec($ch);
322 $curl_info = curl_getinfo($ch);
323 $http_code = $curl_info['http_code'];
325 logger('post_url: result ' . $http_code . ' - ' . $url, LOGGER_DATA);
329 // Pull out multiple headers, e.g. proxy and continuation headers
330 // allow for HTTP/2.x without fixing code
332 while (preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/', $base)) {
333 $chunk = substr($base, 0, strpos($base, "\r\n\r\n") + 4);
335 $base = substr($base, strlen($chunk));
338 if ($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
340 preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
341 $newurl = trim(array_pop($matches));
343 if (strpos($newurl, '/') === 0) {
344 $newurl = $old_location_info['scheme'] . '://' . $old_location_info['host'] . $newurl;
347 if (filter_var($newurl, FILTER_VALIDATE_URL)) {
349 logger('post_url: redirect ' . $url . ' to ' . $newurl);
350 return post_url($newurl, $params, $headers, $redirects, $timeout);
354 $a->set_curl_code($http_code);
356 $body = substr($s, strlen($header));
358 $a->set_curl_headers($header);
362 $a->save_timestamp($stamp1, 'network');
364 logger('post_url: end ' . $url, LOGGER_DATA);
369 // Generic XML return
370 // Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
371 // of $st and an optional text <message> of $message and terminates the current process.
373 function xml_status($st, $message = '') {
375 $xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : '');
378 logger('xml_status returning non_zero: ' . $st . " message=" . $message);
380 header( "Content-type: text/xml" );
381 echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n";
382 echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n";
387 * @brief Send HTTP status header and exit.
389 * @param integer $val HTTP status result value
390 * @param array $description optional message
391 * 'title' => header title
392 * 'description' => optional message
396 * @brief Send HTTP status header and exit.
398 * @param integer $val HTTP status result value
399 * @param array $description optional message
400 * 'title' => header title
401 * 'description' => optional message
403 function http_status_exit($val, $description = array()) {
407 if (!isset($description["title"]))
408 $description["title"] = $err." ".$val;
410 if($val >= 200 && $val < 300)
413 logger('http_status_exit ' . $val);
414 header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
416 if (isset($description["title"])) {
417 $tpl = get_markup_template('http_status.tpl');
418 echo replace_macros($tpl, array('$title' => $description["title"],
419 '$description' => $description["description"]));
427 * @brief Check URL to se if ts's real
429 * Take a URL from the wild, prepend http:// if necessary
430 * and check DNS to see if it's real (or check if is a valid IP address)
432 * @param string $url The URL to be validated
433 * @return boolean True if it's a valid URL, fals if something wrong with it
435 function validate_url(&$url) {
436 if(get_config('system','disable_url_validation'))
439 // no naked subdomains (allow localhost for tests)
440 if(strpos($url,'.') === false && strpos($url,'/localhost/') === false)
443 if(substr($url,0,4) != 'http')
444 $url = 'http://' . $url;
446 /// @TODO Really supress function outcomes? Why not find them + debug them?
447 $h = @parse_url($url);
449 if((is_array($h)) && (dns_get_record($h['host'], DNS_A + DNS_CNAME + DNS_PTR) || filter_var($h['host'], FILTER_VALIDATE_IP) )) {
457 * @brief Checks that email is an actual resolvable internet address
459 * @param string $addr The email address
460 * @return boolean True if it's a valid email address, false if it's not
462 function validate_email($addr) {
464 if(get_config('system','disable_email_validation'))
467 if(! strpos($addr,'@'))
469 $h = substr($addr,strpos($addr,'@') + 1);
471 if(($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP) )) {
478 * @brief Check if URL is allowed
480 * Check $url against our list of allowed sites,
481 * wildcards allowed. If allowed_sites is unset return true;
483 * @param string $url URL which get tested
484 * @return boolean True if url is allowed otherwise return false
486 function allowed_url($url) {
488 $h = @parse_url($url);
494 $str_allowed = Config::get('system', 'allowed_sites');
495 if (! $str_allowed) {
501 $host = strtolower($h['host']);
503 // always allow our own site
505 if ($host == strtolower($_SERVER['SERVER_NAME'])) {
509 $fnmatch = function_exists('fnmatch');
510 $allowed = explode(',', $str_allowed);
512 if (count($allowed)) {
513 foreach ($allowed as $a) {
514 $pat = strtolower(trim($a));
515 if (($fnmatch && fnmatch($pat, $host)) || ($pat == $host)) {
525 * Checks if the provided url domain is on the domain blocklist.
526 * Returns true if it is or malformed URL, false if not.
528 * @param string $url The url to check the domain from
531 function blocked_url($url) {
532 $h = @parse_url($url);
538 $domain_blocklist = Config::get('system', 'blocklist', array());
539 if (! $domain_blocklist) {
543 $host = strtolower($h['host']);
545 foreach ($domain_blocklist as $domain_block) {
546 if (strtolower($domain_block['domain']) == $host) {
555 * @brief Check if email address is allowed to register here.
557 * Compare against our list (wildcards allowed).
560 * @return boolean False if not allowed, true if allowed
561 * or if allowed list is not configured
563 function allowed_email($email) {
566 $domain = strtolower(substr($email,strpos($email,'@') + 1));
570 $str_allowed = get_config('system','allowed_email');
576 $fnmatch = function_exists('fnmatch');
577 $allowed = explode(',',$str_allowed);
579 if(count($allowed)) {
580 foreach($allowed as $a) {
581 $pat = strtolower(trim($a));
582 if(($fnmatch && fnmatch($pat,$domain)) || ($pat == $domain)) {
591 function avatar_img($email) {
593 $avatar['size'] = 175;
594 $avatar['email'] = $email;
596 $avatar['success'] = false;
598 call_hooks('avatar_lookup', $avatar);
600 if (! $avatar['success']) {
601 $avatar['url'] = App::get_baseurl() . '/images/person-175.jpg';
604 logger('Avatar: ' . $avatar['email'] . ' ' . $avatar['url'], LOGGER_DEBUG);
605 return $avatar['url'];
609 function parse_xml_string($s,$strict = true) {
610 /// @todo Move this function to the xml class
612 if(! strstr($s,'<?xml'))
614 $s2 = substr($s,strpos($s,'<?xml'));
618 libxml_use_internal_errors(true);
620 $x = @simplexml_load_string($s2);
622 logger('libxml: parse: error: ' . $s2, LOGGER_DATA);
623 foreach (libxml_get_errors() as $err) {
624 logger('libxml: parse: ' . $err->code." at ".$err->line.":".$err->column." : ".$err->message, LOGGER_DATA);
626 libxml_clear_errors();
631 function scale_external_images($srctext, $include_link = true, $scale_replace = false) {
633 // Suppress "view full size"
634 if (intval(get_config('system','no_view_full_size'))) {
635 $include_link = false;
640 // Picture addresses can contain special characters
641 $s = htmlspecialchars_decode($srctext);
644 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism',$s,$matches,PREG_SET_ORDER);
646 require_once('include/Photo.php');
647 foreach ($matches as $mtch) {
648 logger('scale_external_image: ' . $mtch[1]);
650 $hostname = str_replace('www.','',substr(App::get_baseurl(),strpos(App::get_baseurl(),'://')+3));
651 if (stristr($mtch[1],$hostname)) {
655 // $scale_replace, if passed, is an array of two elements. The
656 // first is the name of the full-size image. The second is the
657 // name of a remote, scaled-down version of the full size image.
658 // This allows Friendica to display the smaller remote image if
659 // one exists, while still linking to the full-size image
660 if ($scale_replace) {
661 $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
665 $i = fetch_url($scaled);
670 // guess mimetype from headers or filename
671 $type = guess_image_type($mtch[1],true);
674 $ph = new Photo($i, $type);
675 if ($ph->is_valid()) {
676 $orig_width = $ph->getWidth();
677 $orig_height = $ph->getHeight();
679 if ($orig_width > 640 || $orig_height > 640) {
681 $ph->scaleImage(640);
682 $new_width = $ph->getWidth();
683 $new_height = $ph->getHeight();
684 logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
685 $s = str_replace($mtch[0],'[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
686 . "\n" . (($include_link)
687 ? '[url=' . $mtch[1] . ']' . t('view full size') . '[/url]' . "\n"
689 logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
696 // replace the special char encoding
697 $s = htmlspecialchars($s,ENT_NOQUOTES,'UTF-8');
702 function fix_contact_ssl_policy(&$contact,$new_policy) {
704 $ssl_changed = false;
705 if ((intval($new_policy) == SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'],'https:')) {
707 $contact['url'] = str_replace('https:','http:',$contact['url']);
708 $contact['request'] = str_replace('https:','http:',$contact['request']);
709 $contact['notify'] = str_replace('https:','http:',$contact['notify']);
710 $contact['poll'] = str_replace('https:','http:',$contact['poll']);
711 $contact['confirm'] = str_replace('https:','http:',$contact['confirm']);
712 $contact['poco'] = str_replace('https:','http:',$contact['poco']);
715 if ((intval($new_policy) == SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'],'http:')) {
717 $contact['url'] = str_replace('http:','https:',$contact['url']);
718 $contact['request'] = str_replace('http:','https:',$contact['request']);
719 $contact['notify'] = str_replace('http:','https:',$contact['notify']);
720 $contact['poll'] = str_replace('http:','https:',$contact['poll']);
721 $contact['confirm'] = str_replace('http:','https:',$contact['confirm']);
722 $contact['poco'] = str_replace('http:','https:',$contact['poco']);
726 q("UPDATE `contact` SET
733 WHERE `id` = %d LIMIT 1",
734 dbesc($contact['url']),
735 dbesc($contact['request']),
736 dbesc($contact['notify']),
737 dbesc($contact['poll']),
738 dbesc($contact['confirm']),
739 dbesc($contact['poco']),
740 intval($contact['id'])
746 * @brief Remove Google Analytics and other tracking platforms params from URL
748 * @param string $url Any user-submitted URL that may contain tracking params
749 * @return string The same URL stripped of tracking parameters
751 function strip_tracking_query_params($url)
753 $urldata = parse_url($url);
754 if (is_string($urldata["query"])) {
755 $query = $urldata["query"];
756 parse_str($query, $querydata);
758 if (is_array($querydata)) {
759 foreach ($querydata AS $param => $value) {
760 if (in_array($param, array("utm_source", "utm_medium", "utm_term", "utm_content", "utm_campaign",
761 "wt_mc", "pk_campaign", "pk_kwd", "mc_cid", "mc_eid",
762 "fb_action_ids", "fb_action_types", "fb_ref",
764 "woo_campaign", "woo_source", "woo_medium", "woo_content", "woo_term"))) {
766 $pair = $param . "=" . urlencode($value);
767 $url = str_replace($pair, "", $url);
769 // Second try: if the url isn't encoded completely
770 $pair = $param . "=" . str_replace(" ", "+", $value);
771 $url = str_replace($pair, "", $url);
773 // Third try: Maybey the url isn't encoded at all
774 $pair = $param . "=" . $value;
775 $url = str_replace($pair, "", $url);
777 $url = str_replace(array("?&", "&&"), array("?", ""), $url);
782 if (substr($url, -1, 1) == "?") {
783 $url = substr($url, 0, -1);
791 * @brief Returns the original URL of the provided URL
793 * This function strips tracking query params and follows redirections, either
794 * through HTTP code or meta refresh tags. Stops after 10 redirections.
796 * @todo Remove the $fetchbody parameter that generates an extraneous HEAD request
798 * @see ParseUrl::getSiteinfo
800 * @param string $url A user-submitted URL
801 * @param int $depth The current redirection recursion level (internal)
802 * @param bool $fetchbody Wether to fetch the body or not after the HEAD requests
803 * @return string A canonical URL
805 function original_url($url, $depth = 1, $fetchbody = false) {
808 $url = strip_tracking_query_params($url);
813 $url = trim($url, "'");
815 $stamp1 = microtime(true);
819 curl_setopt($ch, CURLOPT_URL, $url);
820 curl_setopt($ch, CURLOPT_HEADER, 1);
821 curl_setopt($ch, CURLOPT_NOBODY, 1);
822 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
823 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
824 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
826 $header = curl_exec($ch);
827 $curl_info = @curl_getinfo($ch);
828 $http_code = $curl_info['http_code'];
831 $a->save_timestamp($stamp1, "network");
836 if ((($curl_info['http_code'] == "301") OR ($curl_info['http_code'] == "302"))
837 AND (($curl_info['redirect_url'] != "") OR ($curl_info['location'] != ""))) {
838 if ($curl_info['redirect_url'] != "")
839 return(original_url($curl_info['redirect_url'], ++$depth, $fetchbody));
841 return(original_url($curl_info['location'], ++$depth, $fetchbody));
844 // Check for redirects in the meta elements of the body if there are no redirects in the header.
846 return(original_url($url, ++$depth, true));
848 // if the file is too large then exit
849 if ($curl_info["download_content_length"] > 1000000)
852 // if it isn't a HTML file then exit
853 if (($curl_info["content_type"] != "") AND !strstr(strtolower($curl_info["content_type"]),"html"))
856 $stamp1 = microtime(true);
859 curl_setopt($ch, CURLOPT_URL, $url);
860 curl_setopt($ch, CURLOPT_HEADER, 0);
861 curl_setopt($ch, CURLOPT_NOBODY, 0);
862 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
863 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
864 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
866 $body = curl_exec($ch);
869 $a->save_timestamp($stamp1, "network");
871 if (trim($body) == "")
874 // Check for redirect in meta elements
875 $doc = new DOMDocument();
876 @$doc->loadHTML($body);
878 $xpath = new DomXPath($doc);
880 $list = $xpath->query("//meta[@content]");
881 foreach ($list as $node) {
883 if ($node->attributes->length)
884 foreach ($node->attributes as $attribute)
885 $attr[$attribute->name] = $attribute->value;
887 if (@$attr["http-equiv"] == 'refresh') {
888 $path = $attr["content"];
889 $pathinfo = explode(";", $path);
891 foreach ($pathinfo AS $value)
892 if (substr(strtolower($value), 0, 4) == "url=")
893 return(original_url(substr($value, 4), ++$depth));
900 function short_link($url) {
901 require_once('library/slinky.php');
902 $slinky = new Slinky($url);
903 $yourls_url = get_config('yourls','url1');
905 $yourls_username = get_config('yourls','username1');
906 $yourls_password = get_config('yourls', 'password1');
907 $yourls_ssl = get_config('yourls', 'ssl1');
908 $yourls = new Slinky_YourLS();
909 $yourls->set('username', $yourls_username);
910 $yourls->set('password', $yourls_password);
911 $yourls->set('ssl', $yourls_ssl);
912 $yourls->set('yourls-url', $yourls_url);
913 $slinky->set_cascade(array($yourls, new Slinky_Ur1ca(), new Slinky_TinyURL()));
915 // setup a cascade of shortening services
916 // try to get a short link from these services
917 // in the order ur1.ca, tinyurl
918 $slinky->set_cascade(array(new Slinky_Ur1ca(), new Slinky_TinyURL()));
920 return $slinky->short();
924 * @brief Encodes content to json
926 * This function encodes an array to json format
927 * and adds an application/json HTTP header to the output.
928 * After finishing the process is getting killed.
930 * @param array $x The input content
932 function json_return_and_die($x) {
933 header("content-type: application/json");
934 echo json_encode($x);
939 * @brief Find the matching part between two url
941 * @param string $url1
942 * @param string $url2
943 * @return string The matching part
945 function matching_url($url1, $url2) {
947 if (($url1 == "") OR ($url2 == ""))
950 $url1 = normalise_link($url1);
951 $url2 = normalise_link($url2);
953 $parts1 = parse_url($url1);
954 $parts2 = parse_url($url2);
956 if (!isset($parts1["host"]) OR !isset($parts2["host"]))
959 if ($parts1["scheme"] != $parts2["scheme"])
962 if ($parts1["host"] != $parts2["host"])
965 if ($parts1["port"] != $parts2["port"])
968 $match = $parts1["scheme"]."://".$parts1["host"];
971 $match .= ":".$parts1["port"];
973 $pathparts1 = explode("/", $parts1["path"]);
974 $pathparts2 = explode("/", $parts2["path"]);
979 $path1 = $pathparts1[$i];
980 $path2 = $pathparts2[$i];
982 if ($path1 == $path2)
985 } while (($path1 == $path2) AND ($i++ <= count($pathparts1)));
989 return normalise_link($match);