4 * @file include/network.php
8 use Friendica\Core\Config;
9 use Friendica\Network\Probe;
11 require_once("include/xml.php");
16 * If binary flag is true, return binary results.
17 * Set the cookiejar argument to a string (e.g. "/tmp/friendica-cookies.txt")
18 * to preserve cookies from one request to the next.
20 * @param string $url URL to fetch
21 * @param boolean $binary default false
22 * TRUE if asked to return binary results (file download)
23 * @param integer $redirects The recursion counter for internal use - default 0
24 * @param integer $timeout Timeout in seconds, default system config value or 60 seconds
25 * @param string $accept_content supply Accept: header with 'accept_content' as the value
26 * @param string $cookiejar Path to cookie jar file
28 * @return string The fetched content
30 function fetch_url($url,$binary = false, &$redirects = 0, $timeout = 0, $accept_content=Null, $cookiejar = 0) {
36 array('timeout'=>$timeout,
37 'accept_content'=>$accept_content,
38 'cookiejar'=>$cookiejar
45 * @brief fetches an URL.
47 * @param string $url URL to fetch
48 * @param boolean $binary default false
49 * TRUE if asked to return binary results (file download)
50 * @param int $redirects The recursion counter for internal use - default 0
51 * @param array $opts (optional parameters) assoziative array with:
52 * 'accept_content' => supply Accept: header with 'accept_content' as the value
53 * 'timeout' => int Timeout in seconds, default system config value or 60 seconds
54 * 'http_auth' => username:password
55 * 'novalidate' => do not validate SSL certs, default is to validate using our CA list
56 * 'nobody' => only return the header
57 * 'cookiejar' => path to cookie jar file
59 * @return array an assoziative array with:
60 * int 'return_code' => HTTP return code or 0 if timeout or failure
61 * boolean 'success' => boolean true (if HTTP 2xx result) or false
62 * string 'redirect_url' => in case of redirect, content was finally retrieved from this URL
63 * string 'header' => HTTP headers
64 * string 'body' => fetched content
66 function z_fetch_url($url, $binary = false, &$redirects = 0, $opts = array()) {
67 $ret = array('return_code' => 0, 'success' => false, 'header' => '', 'body' => '');
69 $stamp1 = microtime(true);
73 if (blocked_url($url)) {
74 logger('z_fetch_url: domain of ' . $url . ' is blocked', LOGGER_DATA);
78 $ch = @curl_init($url);
80 if (($redirects > 8) || (!$ch)) {
84 @curl_setopt($ch, CURLOPT_HEADER, true);
86 if (x($opts, "cookiejar")) {
87 curl_setopt($ch, CURLOPT_COOKIEJAR, $opts["cookiejar"]);
88 curl_setopt($ch, CURLOPT_COOKIEFILE, $opts["cookiejar"]);
91 // These settings aren't needed. We're following the location already.
92 // @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
93 // @curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
95 if (x($opts, 'accept_content')) {
96 curl_setopt($ch, CURLOPT_HTTPHEADER, array(
97 'Accept: ' . $opts['accept_content']
101 @curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
102 @curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
104 $range = intval(Config::get('system', 'curl_range_bytes', 0));
107 @curl_setopt($ch, CURLOPT_RANGE, '0-' . $range);
110 if (x($opts, 'headers')) {
111 @curl_setopt($ch, CURLOPT_HTTPHEADER, $opts['headers']);
114 if (x($opts, 'nobody')) {
115 @curl_setopt($ch, CURLOPT_NOBODY, $opts['nobody']);
118 if (x($opts, 'timeout')) {
119 @curl_setopt($ch, CURLOPT_TIMEOUT, $opts['timeout']);
121 $curl_time = intval(get_config('system', 'curl_timeout'));
122 @curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
125 // by default we will allow self-signed certs
126 // but you can override this
128 $check_cert = get_config('system', 'verifyssl');
129 @curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
132 @curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
135 $proxy = get_config('system', 'proxy');
137 if (strlen($proxy)) {
138 @curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
139 @curl_setopt($ch, CURLOPT_PROXY, $proxy);
140 $proxyuser = @get_config('system', 'proxyuser');
142 if (strlen($proxyuser)) {
143 @curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
148 @curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
151 $a->set_curl_code(0);
153 // don't let curl abort the entire application
154 // if it throws any errors.
156 $s = @curl_exec($ch);
158 if (curl_errno($ch) !== CURLE_OK) {
159 logger('fetch_url error fetching ' . $url . ': ' . curl_error($ch), LOGGER_NORMAL);
162 $ret['errno'] = curl_errno($ch);
165 $curl_info = @curl_getinfo($ch);
167 $http_code = $curl_info['http_code'];
168 logger('fetch_url ' . $url . ': ' . $http_code . " " . $s, LOGGER_DATA);
171 // Pull out multiple headers, e.g. proxy and continuation headers
172 // allow for HTTP/2.x without fixing code
174 while (preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/', $base)) {
175 $chunk = substr($base, 0, strpos($base, "\r\n\r\n") + 4);
177 $base = substr($base, strlen($chunk));
180 $a->set_curl_code($http_code);
181 $a->set_curl_content_type($curl_info['content_type']);
182 $a->set_curl_headers($header);
184 if ($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
185 $new_location_info = @parse_url($curl_info['redirect_url']);
186 $old_location_info = @parse_url($curl_info['url']);
188 $newurl = $curl_info['redirect_url'];
190 if (($new_location_info['path'] == '') AND ( $new_location_info['host'] != '')) {
191 $newurl = $new_location_info['scheme'] . '://' . $new_location_info['host'] . $old_location_info['path'];
196 if (preg_match('/(Location:|URI:)(.*?)\n/i', $header, $matches)) {
197 $newurl = trim(array_pop($matches));
200 if (strpos($newurl, '/') === 0) {
201 $newurl = $old_location_info['scheme'] . '://' . $old_location_info['host'] . $newurl;
204 if (filter_var($newurl, FILTER_VALIDATE_URL)) {
207 return z_fetch_url($newurl, $binary, $redirects, $opts);
211 $a->set_curl_code($http_code);
212 $a->set_curl_content_type($curl_info['content_type']);
214 $body = substr($s, strlen($header));
216 $rc = intval($http_code);
217 $ret['return_code'] = $rc;
218 $ret['success'] = (($rc >= 200 && $rc <= 299) ? true : false);
219 $ret['redirect_url'] = $url;
221 if (!$ret['success']) {
222 $ret['error'] = curl_error($ch);
223 $ret['debug'] = $curl_info;
224 logger('z_fetch_url: error: ' . $url . ': ' . $ret['error'], LOGGER_DEBUG);
225 logger('z_fetch_url: debug: ' . print_r($curl_info, true), LOGGER_DATA);
228 $ret['body'] = substr($s, strlen($header));
229 $ret['header'] = $header;
231 if (x($opts, 'debug')) {
232 $ret['debug'] = $curl_info;
237 $a->save_timestamp($stamp1, 'network');
243 * @brief Send POST request to $url
245 * @param string $url URL to post
246 * @param mixed $params array of POST variables
247 * @param string $headers HTTP headers
248 * @param integer $redirects Recursion counter for internal use - default = 0
249 * @param integer $timeout The timeout in seconds, default system config value or 60 seconds
251 * @return string The content
253 function post_url($url, $params, $headers = null, &$redirects = 0, $timeout = 0) {
254 $stamp1 = microtime(true);
256 if (blocked_url($url)) {
257 logger('post_url: domain of ' . $url . ' is blocked', LOGGER_DATA);
262 $ch = curl_init($url);
264 if (($redirects > 8) || (!$ch)) {
268 logger('post_url: start ' . $url, LOGGER_DATA);
270 curl_setopt($ch, CURLOPT_HEADER, true);
271 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
272 curl_setopt($ch, CURLOPT_POST, 1);
273 curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
274 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
276 if (intval($timeout)) {
277 curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
279 $curl_time = intval(get_config('system', 'curl_timeout'));
280 curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
283 if (defined('LIGHTTPD')) {
284 if (!is_array($headers)) {
285 $headers = array('Expect:');
287 if (!in_array('Expect:', $headers)) {
288 array_push($headers, 'Expect:');
294 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
297 $check_cert = get_config('system', 'verifyssl');
298 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
301 @curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
304 $proxy = get_config('system', 'proxy');
306 if (strlen($proxy)) {
307 curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
308 curl_setopt($ch, CURLOPT_PROXY, $proxy);
309 $proxyuser = get_config('system', 'proxyuser');
310 if (strlen($proxyuser)) {
311 curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyuser);
315 $a->set_curl_code(0);
317 // don't let curl abort the entire application
318 // if it throws any errors.
320 $s = @curl_exec($ch);
323 $curl_info = curl_getinfo($ch);
324 $http_code = $curl_info['http_code'];
326 logger('post_url: result ' . $http_code . ' - ' . $url, LOGGER_DATA);
330 // Pull out multiple headers, e.g. proxy and continuation headers
331 // allow for HTTP/2.x without fixing code
333 while (preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/', $base)) {
334 $chunk = substr($base, 0, strpos($base, "\r\n\r\n") + 4);
336 $base = substr($base, strlen($chunk));
339 if ($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) {
341 preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
342 $newurl = trim(array_pop($matches));
344 if (strpos($newurl, '/') === 0) {
345 $newurl = $old_location_info['scheme'] . '://' . $old_location_info['host'] . $newurl;
348 if (filter_var($newurl, FILTER_VALIDATE_URL)) {
350 logger('post_url: redirect ' . $url . ' to ' . $newurl);
351 return post_url($newurl, $params, $headers, $redirects, $timeout);
355 $a->set_curl_code($http_code);
357 $body = substr($s, strlen($header));
359 $a->set_curl_headers($header);
363 $a->save_timestamp($stamp1, 'network');
365 logger('post_url: end ' . $url, LOGGER_DATA);
370 // Generic XML return
371 // Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
372 // of $st and an optional text <message> of $message and terminates the current process.
374 function xml_status($st, $message = '') {
376 $xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : '');
379 logger('xml_status returning non_zero: ' . $st . " message=" . $message);
381 header( "Content-type: text/xml" );
382 echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n";
383 echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n";
388 * @brief Send HTTP status header and exit.
390 * @param integer $val HTTP status result value
391 * @param array $description optional message
392 * 'title' => header title
393 * 'description' => optional message
397 * @brief Send HTTP status header and exit.
399 * @param integer $val HTTP status result value
400 * @param array $description optional message
401 * 'title' => header title
402 * 'description' => optional message
404 function http_status_exit($val, $description = array()) {
408 if (!isset($description["title"]))
409 $description["title"] = $err." ".$val;
411 if($val >= 200 && $val < 300)
414 logger('http_status_exit ' . $val);
415 header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
417 if (isset($description["title"])) {
418 $tpl = get_markup_template('http_status.tpl');
419 echo replace_macros($tpl, array('$title' => $description["title"],
420 '$description' => $description["description"]));
428 * @brief Check URL to se if ts's real
430 * Take a URL from the wild, prepend http:// if necessary
431 * and check DNS to see if it's real (or check if is a valid IP address)
433 * @param string $url The URL to be validated
434 * @return boolean True if it's a valid URL, fals if something wrong with it
436 function validate_url(&$url) {
437 if(get_config('system','disable_url_validation'))
440 // no naked subdomains (allow localhost for tests)
441 if(strpos($url,'.') === false && strpos($url,'/localhost/') === false)
444 if(substr($url,0,4) != 'http')
445 $url = 'http://' . $url;
447 /// @TODO Really supress function outcomes? Why not find them + debug them?
448 $h = @parse_url($url);
450 if((is_array($h)) && (dns_get_record($h['host'], DNS_A + DNS_CNAME + DNS_PTR) || filter_var($h['host'], FILTER_VALIDATE_IP) )) {
458 * @brief Checks that email is an actual resolvable internet address
460 * @param string $addr The email address
461 * @return boolean True if it's a valid email address, false if it's not
463 function validate_email($addr) {
465 if(get_config('system','disable_email_validation'))
468 if(! strpos($addr,'@'))
470 $h = substr($addr,strpos($addr,'@') + 1);
472 if(($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP) )) {
479 * @brief Check if URL is allowed
481 * Check $url against our list of allowed sites,
482 * wildcards allowed. If allowed_sites is unset return true;
484 * @param string $url URL which get tested
485 * @return boolean True if url is allowed otherwise return false
487 function allowed_url($url) {
489 $h = @parse_url($url);
495 $str_allowed = Config::get('system', 'allowed_sites');
496 if (! $str_allowed) {
502 $host = strtolower($h['host']);
504 // always allow our own site
506 if ($host == strtolower($_SERVER['SERVER_NAME'])) {
510 $fnmatch = function_exists('fnmatch');
511 $allowed = explode(',', $str_allowed);
513 if (count($allowed)) {
514 foreach ($allowed as $a) {
515 $pat = strtolower(trim($a));
516 if (($fnmatch && fnmatch($pat, $host)) || ($pat == $host)) {
526 * Checks if the provided url domain is on the domain blocklist.
527 * Returns true if it is or malformed URL, false if not.
529 * @param string $url The url to check the domain from
532 function blocked_url($url) {
533 $h = @parse_url($url);
539 $domain_blocklist = Config::get('system', 'blocklist', array());
540 if (! $domain_blocklist) {
544 $host = strtolower($h['host']);
546 foreach ($domain_blocklist as $domain_block) {
547 if (strtolower($domain_block['domain']) == $host) {
556 * @brief Check if email address is allowed to register here.
558 * Compare against our list (wildcards allowed).
561 * @return boolean False if not allowed, true if allowed
562 * or if allowed list is not configured
564 function allowed_email($email) {
567 $domain = strtolower(substr($email,strpos($email,'@') + 1));
571 $str_allowed = get_config('system','allowed_email');
577 $fnmatch = function_exists('fnmatch');
578 $allowed = explode(',',$str_allowed);
580 if(count($allowed)) {
581 foreach($allowed as $a) {
582 $pat = strtolower(trim($a));
583 if(($fnmatch && fnmatch($pat,$domain)) || ($pat == $domain)) {
592 function avatar_img($email) {
594 $avatar['size'] = 175;
595 $avatar['email'] = $email;
597 $avatar['success'] = false;
599 call_hooks('avatar_lookup', $avatar);
601 if (! $avatar['success']) {
602 $avatar['url'] = App::get_baseurl() . '/images/person-175.jpg';
605 logger('Avatar: ' . $avatar['email'] . ' ' . $avatar['url'], LOGGER_DEBUG);
606 return $avatar['url'];
610 function parse_xml_string($s,$strict = true) {
611 /// @todo Move this function to the xml class
613 if(! strstr($s,'<?xml'))
615 $s2 = substr($s,strpos($s,'<?xml'));
619 libxml_use_internal_errors(true);
621 $x = @simplexml_load_string($s2);
623 logger('libxml: parse: error: ' . $s2, LOGGER_DATA);
624 foreach (libxml_get_errors() as $err) {
625 logger('libxml: parse: ' . $err->code." at ".$err->line.":".$err->column." : ".$err->message, LOGGER_DATA);
627 libxml_clear_errors();
632 function scale_external_images($srctext, $include_link = true, $scale_replace = false) {
634 // Suppress "view full size"
635 if (intval(get_config('system','no_view_full_size'))) {
636 $include_link = false;
641 // Picture addresses can contain special characters
642 $s = htmlspecialchars_decode($srctext);
645 $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism',$s,$matches,PREG_SET_ORDER);
647 require_once('include/Photo.php');
648 foreach ($matches as $mtch) {
649 logger('scale_external_image: ' . $mtch[1]);
651 $hostname = str_replace('www.','',substr(App::get_baseurl(),strpos(App::get_baseurl(),'://')+3));
652 if (stristr($mtch[1],$hostname)) {
656 // $scale_replace, if passed, is an array of two elements. The
657 // first is the name of the full-size image. The second is the
658 // name of a remote, scaled-down version of the full size image.
659 // This allows Friendica to display the smaller remote image if
660 // one exists, while still linking to the full-size image
661 if ($scale_replace) {
662 $scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
666 $i = fetch_url($scaled);
671 // guess mimetype from headers or filename
672 $type = guess_image_type($mtch[1],true);
675 $ph = new Photo($i, $type);
676 if ($ph->is_valid()) {
677 $orig_width = $ph->getWidth();
678 $orig_height = $ph->getHeight();
680 if ($orig_width > 640 || $orig_height > 640) {
682 $ph->scaleImage(640);
683 $new_width = $ph->getWidth();
684 $new_height = $ph->getHeight();
685 logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
686 $s = str_replace($mtch[0],'[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
687 . "\n" . (($include_link)
688 ? '[url=' . $mtch[1] . ']' . t('view full size') . '[/url]' . "\n"
690 logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
697 // replace the special char encoding
698 $s = htmlspecialchars($s,ENT_NOQUOTES,'UTF-8');
703 function fix_contact_ssl_policy(&$contact,$new_policy) {
705 $ssl_changed = false;
706 if ((intval($new_policy) == SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'],'https:')) {
708 $contact['url'] = str_replace('https:','http:',$contact['url']);
709 $contact['request'] = str_replace('https:','http:',$contact['request']);
710 $contact['notify'] = str_replace('https:','http:',$contact['notify']);
711 $contact['poll'] = str_replace('https:','http:',$contact['poll']);
712 $contact['confirm'] = str_replace('https:','http:',$contact['confirm']);
713 $contact['poco'] = str_replace('https:','http:',$contact['poco']);
716 if ((intval($new_policy) == SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'],'http:')) {
718 $contact['url'] = str_replace('http:','https:',$contact['url']);
719 $contact['request'] = str_replace('http:','https:',$contact['request']);
720 $contact['notify'] = str_replace('http:','https:',$contact['notify']);
721 $contact['poll'] = str_replace('http:','https:',$contact['poll']);
722 $contact['confirm'] = str_replace('http:','https:',$contact['confirm']);
723 $contact['poco'] = str_replace('http:','https:',$contact['poco']);
727 q("UPDATE `contact` SET
734 WHERE `id` = %d LIMIT 1",
735 dbesc($contact['url']),
736 dbesc($contact['request']),
737 dbesc($contact['notify']),
738 dbesc($contact['poll']),
739 dbesc($contact['confirm']),
740 dbesc($contact['poco']),
741 intval($contact['id'])
747 * @brief Remove Google Analytics and other tracking platforms params from URL
749 * @param string $url Any user-submitted URL that may contain tracking params
750 * @return string The same URL stripped of tracking parameters
752 function strip_tracking_query_params($url)
754 $urldata = parse_url($url);
755 if (is_string($urldata["query"])) {
756 $query = $urldata["query"];
757 parse_str($query, $querydata);
759 if (is_array($querydata)) {
760 foreach ($querydata AS $param => $value) {
761 if (in_array($param, array("utm_source", "utm_medium", "utm_term", "utm_content", "utm_campaign",
762 "wt_mc", "pk_campaign", "pk_kwd", "mc_cid", "mc_eid",
763 "fb_action_ids", "fb_action_types", "fb_ref",
765 "woo_campaign", "woo_source", "woo_medium", "woo_content", "woo_term"))) {
767 $pair = $param . "=" . urlencode($value);
768 $url = str_replace($pair, "", $url);
770 // Second try: if the url isn't encoded completely
771 $pair = $param . "=" . str_replace(" ", "+", $value);
772 $url = str_replace($pair, "", $url);
774 // Third try: Maybey the url isn't encoded at all
775 $pair = $param . "=" . $value;
776 $url = str_replace($pair, "", $url);
778 $url = str_replace(array("?&", "&&"), array("?", ""), $url);
783 if (substr($url, -1, 1) == "?") {
784 $url = substr($url, 0, -1);
792 * @brief Returns the original URL of the provided URL
794 * This function strips tracking query params and follows redirections, either
795 * through HTTP code or meta refresh tags. Stops after 10 redirections.
797 * @todo Remove the $fetchbody parameter that generates an extraneous HEAD request
799 * @see ParseUrl::getSiteinfo
801 * @param string $url A user-submitted URL
802 * @param int $depth The current redirection recursion level (internal)
803 * @param bool $fetchbody Wether to fetch the body or not after the HEAD requests
804 * @return string A canonical URL
806 function original_url($url, $depth = 1, $fetchbody = false) {
809 $url = strip_tracking_query_params($url);
814 $url = trim($url, "'");
816 $stamp1 = microtime(true);
820 curl_setopt($ch, CURLOPT_URL, $url);
821 curl_setopt($ch, CURLOPT_HEADER, 1);
822 curl_setopt($ch, CURLOPT_NOBODY, 1);
823 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
824 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
825 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
827 $header = curl_exec($ch);
828 $curl_info = @curl_getinfo($ch);
829 $http_code = $curl_info['http_code'];
832 $a->save_timestamp($stamp1, "network");
837 if ((($curl_info['http_code'] == "301") OR ($curl_info['http_code'] == "302"))
838 AND (($curl_info['redirect_url'] != "") OR ($curl_info['location'] != ""))) {
839 if ($curl_info['redirect_url'] != "")
840 return(original_url($curl_info['redirect_url'], ++$depth, $fetchbody));
842 return(original_url($curl_info['location'], ++$depth, $fetchbody));
845 // Check for redirects in the meta elements of the body if there are no redirects in the header.
847 return(original_url($url, ++$depth, true));
849 // if the file is too large then exit
850 if ($curl_info["download_content_length"] > 1000000)
853 // if it isn't a HTML file then exit
854 if (($curl_info["content_type"] != "") AND !strstr(strtolower($curl_info["content_type"]),"html"))
857 $stamp1 = microtime(true);
860 curl_setopt($ch, CURLOPT_URL, $url);
861 curl_setopt($ch, CURLOPT_HEADER, 0);
862 curl_setopt($ch, CURLOPT_NOBODY, 0);
863 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
864 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
865 curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
867 $body = curl_exec($ch);
870 $a->save_timestamp($stamp1, "network");
872 if (trim($body) == "")
875 // Check for redirect in meta elements
876 $doc = new DOMDocument();
877 @$doc->loadHTML($body);
879 $xpath = new DomXPath($doc);
881 $list = $xpath->query("//meta[@content]");
882 foreach ($list as $node) {
884 if ($node->attributes->length)
885 foreach ($node->attributes as $attribute)
886 $attr[$attribute->name] = $attribute->value;
888 if (@$attr["http-equiv"] == 'refresh') {
889 $path = $attr["content"];
890 $pathinfo = explode(";", $path);
892 foreach ($pathinfo AS $value)
893 if (substr(strtolower($value), 0, 4) == "url=")
894 return(original_url(substr($value, 4), ++$depth));
901 function short_link($url) {
902 require_once('library/slinky.php');
903 $slinky = new Slinky($url);
904 $yourls_url = get_config('yourls','url1');
906 $yourls_username = get_config('yourls','username1');
907 $yourls_password = get_config('yourls', 'password1');
908 $yourls_ssl = get_config('yourls', 'ssl1');
909 $yourls = new Slinky_YourLS();
910 $yourls->set('username', $yourls_username);
911 $yourls->set('password', $yourls_password);
912 $yourls->set('ssl', $yourls_ssl);
913 $yourls->set('yourls-url', $yourls_url);
914 $slinky->set_cascade(array($yourls, new Slinky_Ur1ca(), new Slinky_TinyURL()));
916 // setup a cascade of shortening services
917 // try to get a short link from these services
918 // in the order ur1.ca, tinyurl
919 $slinky->set_cascade(array(new Slinky_Ur1ca(), new Slinky_TinyURL()));
921 return $slinky->short();
925 * @brief Encodes content to json
927 * This function encodes an array to json format
928 * and adds an application/json HTTP header to the output.
929 * After finishing the process is getting killed.
931 * @param array $x The input content
933 function json_return_and_die($x) {
934 header("content-type: application/json");
935 echo json_encode($x);
940 * @brief Find the matching part between two url
942 * @param string $url1
943 * @param string $url2
944 * @return string The matching part
946 function matching_url($url1, $url2) {
948 if (($url1 == "") OR ($url2 == ""))
951 $url1 = normalise_link($url1);
952 $url2 = normalise_link($url2);
954 $parts1 = parse_url($url1);
955 $parts2 = parse_url($url2);
957 if (!isset($parts1["host"]) OR !isset($parts2["host"]))
960 if ($parts1["scheme"] != $parts2["scheme"])
963 if ($parts1["host"] != $parts2["host"])
966 if ($parts1["port"] != $parts2["port"])
969 $match = $parts1["scheme"]."://".$parts1["host"];
972 $match .= ":".$parts1["port"];
974 $pathparts1 = explode("/", $parts1["path"]);
975 $pathparts2 = explode("/", $parts2["path"]);
980 $path1 = $pathparts1[$i];
981 $path2 = $pathparts2[$i];
983 if ($path1 == $path2)
986 } while (($path1 == $path2) AND ($i++ <= count($pathparts1)));
990 return normalise_link($match);