array( 'u' => array( 'name' => 'Username', 'required' => true ), 'media_type' => array( 'name' => 'Media type', 'type' => 'list', 'required' => false, 'values' => array( 'All' => 'all', 'Video' => 'video', 'No Video' => 'novideo' ), 'defaultValue' => 'all' ), 'skip_reviews' => array( 'name' => 'Skip reviews', 'type' => 'checkbox', 'required' => false, 'defaultValue' => false, 'title' => 'Feed includes reviews when checked' ) ), 'Group' => array( 'g' => array( 'name' => 'Group', 'type' => 'text', 'required' => true, 'exampleValue' => 'https://www.facebook.com/groups/743149642484225', 'title' => 'Insert group name or facebook group URL' ) ), 'global' => array( 'limit' => array( 'name' => 'Limit', 'type' => 'number', 'required' => false, 'title' => 'Specify the number of items to return (default: -1)', 'defaultValue' => -1 ) ) ); private $authorName = ''; private $groupName = ''; public function getName(){ switch($this->queriedContext) { case 'User': if(!empty($this->authorName)) { return isset($this->extraInfos['name']) ? $this->extraInfos['name'] : $this->authorName . ' - ' . static::NAME; } break; case 'Group': if(!empty($this->groupName)) { return $this->groupName . ' - ' . static::NAME; } break; } return parent::getName(); } public function getURI() { $uri = self::URI; switch($this->queriedContext) { case 'Group': // Discover groups via https://www.facebook.com/groups/ // Example group: https://www.facebook.com/groups/sailors.worldwide $uri .= 'groups/' . $this->sanitizeGroup(filter_var($this->getInput('g'), FILTER_SANITIZE_URL)); break; case 'User': // Example user 1: https://www.facebook.com/artetv/ // Example user 2: artetv $user = $this->sanitizeUser($this->getInput('u')); if(!strpos($user, '/')) { $uri .= '/pg/' . urlencode($user) . '/posts'; } else { $uri .= 'pages/' . $user; } break; } // Request the mobile version to reduce page size (no javascript) // More information: https://stackoverflow.com/a/11103592 return $uri .= '?_fb_noscript=1'; } public function collectData() { switch($this->queriedContext) { case 'Group': $this->collectGroupData(); break; case 'User': $this->collectUserData(); break; default: returnClientError('Unknown context: "' . $this->queriedContext . '"!'); } $limit = $this->getInput('limit') ?: -1; if($limit > 0 && count($this->items) > $limit) { $this->items = array_slice($this->items, 0, $limit); } } #region Group private function collectGroupData() { $header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE') . "\r\n"); $html = getSimpleHTMLDOM($this->getURI(), $header) or returnServerError('Failed loading facebook page: ' . $this->getURI()); if(!$this->isPublicGroup($html)) { returnClientError('This group is not public! RSS-Bridge only supports public groups!'); } defaultLinkTo($html, substr(self::URI, 0, strlen(self::URI) - 1)); $this->groupName = $this->extractGroupName($html); $posts = $html->find('div.userContentWrapper') or returnServerError('Failed finding posts!'); foreach($posts as $post) { $item = array(); $item['uri'] = $this->extractGroupURI($post); $item['title'] = $this->extractGroupTitle($post); $item['author'] = $this->extractGroupAuthor($post); $item['content'] = $this->extractGroupContent($post); $item['timestamp'] = $this->extractGroupTimestamp($post); $item['enclosures'] = $this->extractGroupEnclosures($post); $this->items[] = $item; } } private function sanitizeGroup($group) { if(filter_var( $group, FILTER_VALIDATE_URL, FILTER_FLAG_HOST_REQUIRED | FILTER_FLAG_PATH_REQUIRED)) { // User provided a URL $urlparts = parse_url($group); if($urlparts['host'] !== parse_url(self::URI)['host'] && 'www.' . $urlparts['host'] !== parse_url(self::URI)['host']) { returnClientError('The host you provided is invalid! Received "' . $urlparts['host'] . '", expected "' . parse_url(self::URI)['host'] . '"!'); } return explode('/', $urlparts['path'])[2]; } elseif(strpos($group, '/') !== false) { returnClientError('The group you provided is invalid: ' . $group); } else { return $group; } } private function isPublicGroup($html) { // Facebook redirects to the groups about page for non-public groups $about = $html->find('#pagelet_group_about', 0); return !($about); } private function extractGroupName($html) { $ogtitle = $html->find('meta[property="og:title"]', 0) or returnServerError('Unable to find group title!'); return htmlspecialchars_decode($ogtitle->content, ENT_QUOTES); } private function extractGroupURI($post) { $elements = $post->find('a') or returnServerError('Unable to find URI!'); foreach($elements as $anchor) { // Find the one that is a permalink if(strpos($anchor->href, 'permalink') !== false) { return $anchor->href; } } return null; } private function extractGroupContent($post) { $content = $post->find('div.userContent', 0) or returnServerError('Unable to find user content!'); return $content->innertext . $content->next_sibling()->innertext; } private function extractGroupTimestamp($post) { $element = $post->find('abbr[data-utime]', 0) or returnServerError('Unable to find timestamp!'); return $element->getAttribute('data-utime'); } private function extractGroupAuthor($post) { $element = $post->find('img', 0) or returnServerError('Unable to find author information!'); return $element->{'aria-label'}; } private function extractGroupEnclosures($post) { $elements = $post->find('div.userContent', 0)->next_sibling()->find('img'); $enclosures = array(); foreach($elements as $enclosure) { $enclosures[] = $enclosure->src; } return empty($enclosures) ? null : $enclosures; } private function extractGroupTitle($post) { $element = $post->find('h5', 0) or returnServerError('Unable to find title!'); if(strpos($element->plaintext, 'shared') === false) { $content = strip_tags($this->extractGroupContent($post)); return $this->extractGroupAuthor($post) . ' posted: ' . substr( $content, 0, strpos(wordwrap($content, 64), "\n") ) . '...'; } return $element->plaintext; } #endregion (Group) #region User /** * Checks if $user is a valid username or URI and returns the username */ private function sanitizeUser($user) { if (filter_var($user, FILTER_VALIDATE_URL)) { $urlparts = parse_url($user); if($urlparts['host'] !== parse_url(self::URI)['host']) { returnClientError('The host you provided is invalid! Received "' . $urlparts['host'] . '", expected "' . parse_url(self::URI)['host'] . '"!'); } if(!array_key_exists('path', $urlparts) || $urlparts['path'] === '/') { returnClientError('The URL you provided doesn\'t contain the user name!'); } return explode('/', $urlparts['path'])[1]; } else { // First character cannot be a forward slash if(strpos($user, '/') === 0) { returnClientError('Remove leading slash "/" from the username!'); } return $user; } } /** * Bypass external link redirection */ private function unescape_fb_link($content){ return preg_replace_callback('/ href=\"([^"]+)\"/i', function($matches){ if(is_array($matches) && count($matches) > 1) { $link = $matches[1]; if(strpos($link, 'facebook.com/l.php?u=') !== false) $link = urldecode(extractFromDelimiters($link, 'facebook.com/l.php?u=', '&')); return ' href="' . $link . '"'; } }, $content); } /** * Convert textual representation of emoticons back to ASCII emoticons. * i.e. "smile emoticon" => ":)" */ private function unescape_fb_emote($content){ return preg_replace_callback('/([^ <>]+) ([^<>]+)<\/u><\/i>/i', function($matches){ static $facebook_emoticons = array( 'smile' => ':)', 'frown' => ':(', 'tongue' => ':P', 'grin' => ':D', 'gasp' => ':O', 'wink' => ';)', 'pacman' => ':<', 'grumpy' => '>_<', 'unsure' => ':/', 'cry' => ':\'(', 'kiki' => '^_^', 'glasses' => '8-)', 'sunglasses' => 'B-)', 'heart' => '<3', 'devil' => ']:D', 'angel' => '0:)', 'squint' => '-_-', 'confused' => 'o_O', 'upset' => 'xD', 'colonthree' => ':3', 'like' => '👍'); $len = count($matches); if ($len > 1) for ($i = 1; $i < $len; $i++) foreach ($facebook_emoticons as $name => $emote) if ($matches[$i] === $name) return $emote; return $matches[0]; }, $content); } /** * Returns the captcha message for the given captcha */ private function returnCaptchaMessage($captcha) { // Save form for submitting after getting captcha response if (session_status() == PHP_SESSION_NONE) { session_start(); } $captcha_fields = array(); foreach ($captcha->find('input, button') as $input) { $captcha_fields[$input->name] = $input->value; } $_SESSION['captcha_fields'] = $captcha_fields; $_SESSION['captcha_action'] = $captcha->find('form', 0)->action; // Show captcha filling form to the viewer, proxying the captcha image $img = base64_encode(getContents($captcha->find('img', 0)->src)); http_response_code(500); header('Content-Type: text/html'); $message = <<

Facebook captcha challenge

Unfortunately, rss-bridge cannot fetch the requested page.
Facebook wants rss-bridge to resolve the following captcha:

Response:

EOD; die($message); } /** * Checks if a capture response was received and tries to load the contents * @return mixed null if no capture response was received, simplhtmldom document otherwise */ private function handleCaptchaResponse() { if (isset($_POST['captcha_response'])) { if (session_status() == PHP_SESSION_NONE) session_start(); if (isset($_SESSION['captcha_fields'], $_SESSION['captcha_action'])) { $captcha_action = $_SESSION['captcha_action']; $captcha_fields = $_SESSION['captcha_fields']; $captcha_fields['captcha_response'] = preg_replace('/[^a-zA-Z0-9]+/', '', $_POST['captcha_response']); $header = array( 'Content-type: application/x-www-form-urlencoded', 'Referer: ' . $captcha_action, 'Cookie: noscript=1' ); $opts = array( CURLOPT_POST => 1, CURLOPT_POSTFIELDS => http_build_query($captcha_fields) ); $html = getSimpleHTMLDOM($captcha_action, $header, $opts) or returnServerError('Failed to submit captcha response back to Facebook'); return $html; } unset($_SESSION['captcha_fields']); unset($_SESSION['captcha_action']); } return null; } private function collectUserData(){ $html = $this->handleCaptchaResponse(); // Retrieve page contents if(is_null($html)) { $header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE')); $html = getSimpleHTMLDOM($this->getURI(), $header) or returnServerError('No results for this query.'); } // Handle captcha form? $captcha = $html->find('div.captcha_interstitial', 0); if (!is_null($captcha)) { $this->returnCaptchaMessage($captcha); } // No captcha? We can carry on retrieving page contents :) // First, we check wether the page is public or not $loginForm = $html->find('._585r', 0); if($loginForm != null) { returnServerError('You must be logged in to view this page. This is not supported by RSS-Bridge.'); } $element = $html ->find('#pagelet_timeline_main_column')[0] ->children(0) ->children(0) ->next_sibling() ->children(0); if(isset($element)) { $author = str_replace(' | Facebook', '', $html->find('title#pageTitle', 0)->innertext); $profilePic = $html->find('meta[property="og:image"]', 0)->content; $this->authorName = $author; foreach($element->children() as $cell) { // Manage summary posts if(strpos($cell->class, '_3xaf') !== false) { $posts = $cell->children(); } else { $posts = array($cell); } // Optionally skip reviews if($this->getInput('skip_reviews') && !is_null($cell->find('#review_composer_container', 0))) { continue; } foreach($posts as $post) { // Check media type switch($this->getInput('media_type')) { case 'all': break; case 'video': if(empty($post->find('[aria-label=Video]'))) continue 2; break; case 'novideo': if(!empty($post->find('[aria-label=Video]'))) continue 2; break; default: break; } $item = array(); if(count($post->find('abbr')) > 0) { //Retrieve post contents $content = preg_replace( '/(?i)>
]+)>(.+?)div\ class=\"userContent\"/i', '', $post); $content = preg_replace( '/(?i)>
]+)>(.+?)<\/div><\/div>
]+)>(.+?)div\ class=\"[^u]+userContent\"/i', '', $content); $content = preg_replace( '/(?i)>
]+)>(.+?)<\/div>/i', '', $content); // Remove "SpSonsSoriSsés" $content = preg_replace( '/(?iU)]+ href="#" role="link" [^>}]+>.+<\/a>/iU', '', $content); // Remove html nodes, keep only img, links, basic formatting $content = strip_tags($content, '

'); $content = $this->unescape_fb_link($content); // Clean useless html tag properties and fix link closing tags foreach (array( 'onmouseover', 'onclick', 'target', 'ajaxify', 'tabindex', 'class', 'style', 'data-[^=]*', 'aria-[^=]*', 'role', 'rel', 'id') as $property_name) { $content = preg_replace('/ ' . $property_name . '=\"[^"]*\"/i', '', $content); } $content = preg_replace('/<\/a [^>]+>/i', '', $content); $this->unescape_fb_emote($content); // Retrieve date of the post $date = $post->find('abbr')[0]; if(isset($date) && $date->hasAttribute('data-utime')) { $date = $date->getAttribute('data-utime'); } else { $date = 0; } // Build title from username and content $title = $author; if(strlen($title) > 24) $title = substr($title, 0, strpos(wordwrap($title, 24), "\n")) . '...'; $title = $title . ' | ' . strip_tags($content); if(strlen($title) > 64) $title = substr($title, 0, strpos(wordwrap($title, 64), "\n")) . '...'; $uri = $post->find('abbr')[0]->parent()->getAttribute('href'); if (false !== strpos($uri, '?')) { $uri = substr($uri, 0, strpos($uri, '?')); } $content = defaultLinkTo($content, self::URI); //Build and add final item $item['uri'] = htmlspecialchars_decode($uri); $item['content'] = htmlspecialchars_decode($content); $item['title'] = $title; $item['author'] = $author; $item['timestamp'] = $date; if(strpos($item['content'], 'items[] = $item; } } } } } #endregion (User) }