2ac44172ac
* Clarify Facebook bridges status Distinguish between both Facebook bridges by their title. This preserves all existing URLs. * Update all URLs to secure HTTPS versions. * Configure author name abbreviation * Improve feed names Use the correct feed name on each bridge. Make sure the feed names don't repeat the "Facebook" name.
727 lines
18 KiB
PHP
727 lines
18 KiB
PHP
<?php
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class FacebookBridge extends BridgeAbstract {
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const MAINTAINER = 'teromene, logmanoriginal';
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const NAME = 'Facebook Bridge | Main Site';
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const URI = 'https://www.facebook.com/';
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const CACHE_TIMEOUT = 300; // 5min
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const DESCRIPTION = 'Input a page title or a profile log. For a profile log,
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please insert the parameter as follow : myExamplePage/132621766841117';
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const PARAMETERS = array(
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'User' => array(
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'u' => array(
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'name' => 'Username',
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'required' => true
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),
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'media_type' => array(
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'name' => 'Media type',
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'type' => 'list',
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'required' => false,
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'values' => array(
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'All' => 'all',
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'Video' => 'video',
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'No Video' => 'novideo'
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),
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'defaultValue' => 'all'
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),
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'skip_reviews' => array(
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'name' => 'Skip reviews',
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'type' => 'checkbox',
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'required' => false,
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'defaultValue' => false,
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'title' => 'Feed includes reviews when checked'
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)
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),
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'Group' => array(
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'g' => array(
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'name' => 'Group',
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'type' => 'text',
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'required' => true,
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'exampleValue' => 'https://www.facebook.com/groups/743149642484225',
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'title' => 'Insert group name or facebook group URL'
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)
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),
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'global' => array(
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'limit' => array(
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'name' => 'Limit',
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'type' => 'number',
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'required' => false,
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'title' => 'Specify the number of items to return (default: -1)',
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'defaultValue' => -1
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)
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)
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);
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private $authorName = '';
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private $groupName = '';
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public function getIcon() {
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return 'https://static.xx.fbcdn.net/rsrc.php/yo/r/iRmz9lCMBD2.ico';
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}
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public function getName(){
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switch($this->queriedContext) {
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case 'User':
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if(!empty($this->authorName)) {
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return isset($this->extraInfos['name']) ? $this->extraInfos['name'] : $this->authorName;
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}
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break;
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case 'Group':
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if(!empty($this->groupName)) {
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return $this->groupName;
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}
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break;
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}
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return parent::getName();
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}
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public function detectParameters($url){
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$params = array();
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// By profile
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$regex = '/^(https?:\/\/)?(www\.)?facebook\.com\/profile\.php\?id\=([^\/?&\n]+)?(.*)/';
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if(preg_match($regex, $url, $matches) > 0) {
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$params['u'] = urldecode($matches[3]);
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return $params;
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}
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// By group
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$regex = '/^(https?:\/\/)?(www\.)?facebook\.com\/groups\/([^\/?\n]+)?(.*)/';
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if(preg_match($regex, $url, $matches) > 0) {
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$params['g'] = urldecode($matches[3]);
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return $params;
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}
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// By username
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$regex = '/^(https?:\/\/)?(www\.)?facebook\.com\/([^\/?\n]+)/';
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if(preg_match($regex, $url, $matches) > 0) {
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$params['u'] = urldecode($matches[3]);
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return $params;
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}
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return null;
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}
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public function getURI() {
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$uri = self::URI;
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switch($this->queriedContext) {
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case 'Group':
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// Discover groups via https://www.facebook.com/groups/
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// Example group: https://www.facebook.com/groups/sailors.worldwide
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$uri .= 'groups/' . $this->sanitizeGroup(filter_var($this->getInput('g'), FILTER_SANITIZE_URL));
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break;
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case 'User':
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// Example user 1: https://www.facebook.com/artetv/
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// Example user 2: artetv
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$user = $this->sanitizeUser($this->getInput('u'));
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if(!strpos($user, '/')) {
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$uri .= urlencode($user) . '/posts';
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} else {
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$uri .= 'pages/' . $user;
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}
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break;
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}
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// Request the mobile version to reduce page size (no javascript)
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// More information: https://stackoverflow.com/a/11103592
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return $uri .= '?_fb_noscript=1';
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}
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public function collectData() {
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switch($this->queriedContext) {
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case 'Group':
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$this->collectGroupData();
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break;
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case 'User':
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$this->collectUserData();
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break;
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default:
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returnClientError('Unknown context: "' . $this->queriedContext . '"!');
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}
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$limit = $this->getInput('limit') ?: -1;
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if($limit > 0 && count($this->items) > $limit) {
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$this->items = array_slice($this->items, 0, $limit);
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}
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}
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#region Group
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private function collectGroupData() {
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if(getEnv('HTTP_ACCEPT_LANGUAGE')) {
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$header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE'));
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} else {
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$header = array();
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}
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$html = getSimpleHTMLDOM($this->getURI(), $header)
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or returnServerError('Failed loading facebook page: ' . $this->getURI());
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if(!$this->isPublicGroup($html)) {
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returnClientError('This group is not public! RSS-Bridge only supports public groups!');
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}
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defaultLinkTo($html, substr(self::URI, 0, strlen(self::URI) - 1));
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$this->groupName = $this->extractGroupName($html);
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$posts = $html->find('div.userContentWrapper')
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or returnServerError('Failed finding posts!');
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foreach($posts as $post) {
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$item = array();
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$item['uri'] = $this->extractGroupURI($post);
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$item['title'] = $this->extractGroupTitle($post);
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$item['author'] = $this->extractGroupAuthor($post);
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$item['content'] = $this->extractGroupContent($post);
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$item['timestamp'] = $this->extractGroupTimestamp($post);
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$item['enclosures'] = $this->extractGroupEnclosures($post);
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$this->items[] = $item;
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}
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}
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private function sanitizeGroup($group) {
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if(filter_var(
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$group,
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FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED)) {
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// User provided a URL
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$urlparts = parse_url($group);
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if($urlparts['host'] !== parse_url(self::URI)['host']
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&& 'www.' . $urlparts['host'] !== parse_url(self::URI)['host']) {
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returnClientError('The host you provided is invalid! Received "'
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. $urlparts['host']
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. '", expected "'
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. parse_url(self::URI)['host']
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. '"!');
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}
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return explode('/', $urlparts['path'])[2];
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} elseif(strpos($group, '/') !== false) {
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returnClientError('The group you provided is invalid: ' . $group);
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} else {
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return $group;
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}
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}
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private function isPublicGroup($html) {
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// Facebook redirects to the groups about page for non-public groups
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$about = $html->find('#pagelet_group_about', 0);
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return !($about);
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}
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private function extractGroupName($html) {
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$ogtitle = $html->find('meta[property="og:title"]', 0)
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or returnServerError('Unable to find group title!');
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return html_entity_decode($ogtitle->content, ENT_QUOTES);
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}
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private function extractGroupURI($post) {
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$elements = $post->find('a')
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or returnServerError('Unable to find URI!');
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foreach($elements as $anchor) {
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// Find the one that is a permalink
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if(strpos($anchor->href, 'permalink') !== false) {
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return $anchor->href;
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}
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}
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return null;
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}
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private function extractGroupContent($post) {
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$content = $post->find('div.userContent', 0)
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or returnServerError('Unable to find user content!');
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return $content->innertext . $content->next_sibling()->innertext;
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}
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private function extractGroupTimestamp($post) {
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$element = $post->find('abbr[data-utime]', 0)
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or returnServerError('Unable to find timestamp!');
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return $element->getAttribute('data-utime');
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}
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private function extractGroupAuthor($post) {
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$element = $post->find('img', 0)
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or returnServerError('Unable to find author information!');
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return $element->{'aria-label'};
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}
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private function extractGroupEnclosures($post) {
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$elements = $post->find('div.userContent', 0)->next_sibling()->find('img');
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$enclosures = array();
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foreach($elements as $enclosure) {
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$enclosures[] = $enclosure->src;
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}
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return empty($enclosures) ? null : $enclosures;
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}
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private function extractGroupTitle($post) {
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$element = $post->find('h5', 0)
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or returnServerError('Unable to find title!');
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if(strpos($element->plaintext, 'shared') === false) {
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$content = strip_tags($this->extractGroupContent($post));
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return $this->extractGroupAuthor($post)
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. ' posted: '
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. substr(
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$content,
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0,
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strpos(wordwrap($content, 64), "\n")
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)
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. '...';
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}
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return $element->plaintext;
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}
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#endregion (Group)
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#region User
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/**
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* Checks if $user is a valid username or URI and returns the username
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*/
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private function sanitizeUser($user) {
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if (filter_var($user, FILTER_VALIDATE_URL)) {
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$urlparts = parse_url($user);
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if($urlparts['host'] !== parse_url(self::URI)['host']) {
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returnClientError('The host you provided is invalid! Received "'
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. $urlparts['host']
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. '", expected "'
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. parse_url(self::URI)['host']
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. '"!');
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}
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if(!array_key_exists('path', $urlparts)
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|| $urlparts['path'] === '/') {
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returnClientError('The URL you provided doesn\'t contain the user name!');
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}
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return explode('/', $urlparts['path'])[1];
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} else {
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// First character cannot be a forward slash
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if(strpos($user, '/') === 0) {
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returnClientError('Remove leading slash "/" from the username!');
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}
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return $user;
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}
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}
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/**
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* Bypass external link redirection
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*/
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private function unescape_fb_link($content){
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return preg_replace_callback('/ href=\"([^"]+)\"/i', function($matches){
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if(is_array($matches) && count($matches) > 1) {
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$link = $matches[1];
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if(strpos($link, 'facebook.com/l.php?u=') !== false)
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$link = urldecode(extractFromDelimiters($link, 'facebook.com/l.php?u=', '&'));
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return ' href="' . $link . '"';
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}
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}, $content);
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}
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/**
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* Remove Facebook's tracking code
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*/
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private function remove_tracking_codes($content){
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return preg_replace_callback('/ href=\"([^"]+)\"/i', function($matches){
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if(is_array($matches) && count($matches) > 1) {
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$link = $matches[1];
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if(strpos($link, 'facebook.com') !== false) {
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if(strpos($link, '?') !== false) {
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$link = substr($link, 0, strpos($link, '?'));
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}
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}
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return ' href="' . $link . '"';
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}
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}, $content);
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}
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/**
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* Convert textual representation of emoticons back to ASCII emoticons.
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* i.e. "<i><u>smile emoticon</u></i>" => ":)"
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*/
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private function unescape_fb_emote($content){
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return preg_replace_callback('/<i><u>([^ <>]+) ([^<>]+)<\/u><\/i>/i', function($matches){
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static $facebook_emoticons = array(
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'smile' => ':)',
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'frown' => ':(',
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'tongue' => ':P',
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'grin' => ':D',
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'gasp' => ':O',
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'wink' => ';)',
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'pacman' => ':<',
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'grumpy' => '>_<',
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'unsure' => ':/',
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'cry' => ':\'(',
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'kiki' => '^_^',
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'glasses' => '8-)',
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'sunglasses' => 'B-)',
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'heart' => '<3',
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'devil' => ']:D',
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'angel' => '0:)',
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'squint' => '-_-',
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'confused' => 'o_O',
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'upset' => 'xD',
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'colonthree' => ':3',
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'like' => '👍');
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$len = count($matches);
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if ($len > 1)
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for ($i = 1; $i < $len; $i++)
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foreach ($facebook_emoticons as $name => $emote)
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if ($matches[$i] === $name)
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return $emote;
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return $matches[0];
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}, $content);
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}
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/**
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* Returns the captcha message for the given captcha
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*/
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private function returnCaptchaMessage($captcha) {
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// Save form for submitting after getting captcha response
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if (session_status() == PHP_SESSION_NONE) {
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session_start();
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}
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$captcha_fields = array();
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foreach ($captcha->find('input, button') as $input) {
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$captcha_fields[$input->name] = $input->value;
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}
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$_SESSION['captcha_fields'] = $captcha_fields;
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$_SESSION['captcha_action'] = $captcha->find('form', 0)->action;
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// Show captcha filling form to the viewer, proxying the captcha image
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$img = base64_encode(getContents($captcha->find('img', 0)->src));
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header('Content-Type: text/html', true, 500);
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$message = <<<EOD
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<form method="post" action="?{$_SERVER['QUERY_STRING']}">
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<h2>Facebook captcha challenge</h2>
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<p>Unfortunately, rss-bridge cannot fetch the requested page.<br />
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Facebook wants rss-bridge to resolve the following captcha:</p>
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<p><img src="data:image/png;base64,{$img}" /></p>
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<p><b>Response:</b> <input name="captcha_response" placeholder="please fill in" />
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<input type="submit" value="Submit!" /></p>
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</form>
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EOD;
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die($message);
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}
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/**
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* Checks if a capture response was received and tries to load the contents
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* @return mixed null if no capture response was received, simplhtmldom document otherwise
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*/
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private function handleCaptchaResponse() {
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if (isset($_POST['captcha_response'])) {
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if (session_status() == PHP_SESSION_NONE)
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session_start();
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if (isset($_SESSION['captcha_fields'], $_SESSION['captcha_action'])) {
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$captcha_action = $_SESSION['captcha_action'];
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$captcha_fields = $_SESSION['captcha_fields'];
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$captcha_fields['captcha_response'] = preg_replace('/[^a-zA-Z0-9]+/', '', $_POST['captcha_response']);
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$header = array(
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'Content-type: application/x-www-form-urlencoded',
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'Referer: ' . $captcha_action,
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'Cookie: noscript=1'
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);
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$opts = array(
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CURLOPT_POST => 1,
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CURLOPT_POSTFIELDS => http_build_query($captcha_fields)
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);
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$html = getSimpleHTMLDOM($captcha_action, $header, $opts)
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or returnServerError('Failed to submit captcha response back to Facebook');
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return $html;
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}
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unset($_SESSION['captcha_fields']);
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unset($_SESSION['captcha_action']);
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}
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return null;
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}
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private function collectUserData(){
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$html = $this->handleCaptchaResponse();
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// Retrieve page contents
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if(is_null($html)) {
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if(getEnv('HTTP_ACCEPT_LANGUAGE')) {
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$header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE'));
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} else {
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$header = array();
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}
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$html = getSimpleHTMLDOM($this->getURI(), $header)
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or returnServerError('No results for this query.');
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}
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// Handle captcha form?
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$captcha = $html->find('div.captcha_interstitial', 0);
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if (!is_null($captcha)) {
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$this->returnCaptchaMessage($captcha);
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}
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// No captcha? We can carry on retrieving page contents :)
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// First, we check wether the page is public or not
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$loginForm = $html->find('._585r', 0);
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if($loginForm != null) {
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returnServerError('You must be logged in to view this page. This is not supported by RSS-Bridge.');
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}
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$element = $html
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->find('#pagelet_timeline_main_column')[0]
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->children(0)
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->children(0)
|
|
->next_sibling()
|
|
->children(0);
|
|
|
|
if(isset($element)) {
|
|
|
|
$author = str_replace(' - Posts | 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) {
|
|
|
|
$content = $post->find('.userContentWrapper', 0);
|
|
|
|
// This array specifies filters applied to all posts in order of appearance
|
|
$content_filters = array(
|
|
'._5mly', // Remove embedded videos (the preview image remains)
|
|
'._2ezg', // Remove "Views ..."
|
|
'.hidden_elem', // Remove hidden elements (they are hidden anyway)
|
|
'.timestampContent', // Remove relative timestamp
|
|
'._6spk', // Remove redundant separator
|
|
);
|
|
|
|
foreach($content_filters as $filter) {
|
|
foreach($content->find($filter) as $subject) {
|
|
$subject->outertext = '';
|
|
}
|
|
}
|
|
|
|
// Change origin tag for embedded media from div to paragraph
|
|
foreach($content->find('._59tj') as $subject) {
|
|
$subject->outertext = '<p>' . $subject->innertext . '</p>';
|
|
}
|
|
|
|
// Change title tag for embedded media from anchor to paragraph
|
|
foreach($content->find('._3n1k a') as $anchor) {
|
|
$anchor->outertext = '<p>' . $anchor->innertext . '</p>';
|
|
}
|
|
|
|
$content = preg_replace(
|
|
'/(?i)><div class=\"_3dp([^>]+)>(.+?)div\ class=\"[^u]+userContent\"/i',
|
|
'',
|
|
$content);
|
|
|
|
$content = preg_replace(
|
|
'/(?i)><div class=\"_4l5([^>]+)>(.+?)<\/div>/i',
|
|
'',
|
|
$content);
|
|
|
|
// Remove "SpSonsSoriSsés"
|
|
$content = preg_replace(
|
|
'/(?iU)<a [^>]+ href="#" role="link" [^>}]+>.+<\/a>/iU',
|
|
'',
|
|
$content);
|
|
|
|
// Remove html nodes, keep only img, links, basic formatting
|
|
$content = strip_tags($content, '<a><img><i><u><br><p>');
|
|
|
|
$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', '</a>', $content);
|
|
|
|
$this->unescape_fb_emote($content);
|
|
|
|
// Restore links in the post before further parsing
|
|
$post = defaultLinkTo($post, self::URI);
|
|
|
|
// Restore links in the content before adding to the item
|
|
$content = defaultLinkTo($content, self::URI);
|
|
|
|
$content = $this->remove_tracking_codes($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 content
|
|
$title = strip_tags($post->find('.userContent', 0)->innertext);
|
|
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, '?'));
|
|
}
|
|
|
|
//Build and add final item
|
|
$item['uri'] = htmlspecialchars_decode($uri, ENT_QUOTES);
|
|
$item['content'] = htmlspecialchars_decode($content, ENT_QUOTES);
|
|
$item['title'] = htmlspecialchars_decode($title, ENT_QUOTES);
|
|
$item['author'] = htmlspecialchars_decode($author, ENT_QUOTES);
|
|
$item['timestamp'] = $date;
|
|
|
|
if(strpos($item['content'], '<img') === false) {
|
|
$item['enclosures'] = array($profilePic);
|
|
}
|
|
|
|
$this->items[] = $item;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endregion (User)
|
|
|
|
}
|