764 lines
25 KiB
PHP
764 lines
25 KiB
PHP
<?php
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class FacebookBridge extends BridgeAbstract
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{
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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 = 1800; // 30min
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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 = [
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'User' => [
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'u' => [
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'name' => 'Username',
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'required' => true
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],
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'media_type' => [
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'name' => 'Media type',
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'type' => 'list',
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'required' => false,
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'values' => [
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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' => [
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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 unchecked'
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]
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],
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'Group' => [
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'g' => [
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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' => [
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'limit' => [
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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 $groupName = '';
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public function getIcon()
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{
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return 'https://static.xx.fbcdn.net/rsrc.php/yo/r/iRmz9lCMBD2.ico';
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}
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public function getName()
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{
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switch ($this->queriedContext) {
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case 'User':
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if (!empty($this->authorName)) {
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return $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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{
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$params = [];
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// By profile
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$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['context'] = 'User';
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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['context'] = 'Group';
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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['context'] = '';
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$params['u'] = urldecode($matches[3]);
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return $params;
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}
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return null;
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}
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public function getURI()
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{
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$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 $uri .= '?_fb_noscript=1';
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}
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public function collectData()
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{
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switch ($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, $limit);
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}
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}
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#region Group
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private function collectGroupData()
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{
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if (getEnv('HTTP_ACCEPT_LANGUAGE')) {
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$header = ['Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE')];
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} else {
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$header = [];
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}
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$touchURI = str_replace(
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'https://www.facebook',
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'https://touch.facebook',
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$this->getURI()
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);
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$html = getSimpleHTMLDOM($touchURI, $header);
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if (!$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 = $html->find('div.story_body_container')
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or returnServerError('Failed finding posts!');
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foreach ($posts as $post) {
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$item = [];
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$item['uri'] = $this->extractGroupPostURI($post);
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$item['title'] = $this->extractGroupPostTitle($post);
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$item['author'] = $this->extractGroupPostAuthor($post);
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$item['content'] = $this->extractGroupPostContent($post);
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$item['enclosures'] = $this->extractGroupPostEnclosures($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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{
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if (
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filter_var(
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$group,
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FILTER_VALIDATE_URL,
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FILTER_FLAG_PATH_REQUIRED
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)
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) {
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// User provided a URL
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$urlparts = parse_url($group);
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$this->validateHost($urlparts['host']);
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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 $group;
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}
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}
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private function validateHost($provided_host)
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{
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// Handle mobile links
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if (strpos($provided_host, 'm.') === 0) {
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$provided_host = substr($provided_host, strlen('m.'));
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}
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if (strpos($provided_host, 'touch.') === 0) {
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$provided_host = substr($provided_host, strlen('touch.'));
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}
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$facebook_host = parse_url(self::URI)['host'];
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if (
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$provided_host !== $facebook_host
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&& 'www.' . $provided_host !== $facebook_host
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) {
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returnClientError('The host you provided is invalid! Received "'
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. $provided_host
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. '", expected "'
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. $facebook_host
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. '"!');
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}
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}
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/**
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* @param $html simple_html_dom
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* @return bool
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*/
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private function isPublicGroup($html)
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{
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// Facebook touch just presents a login page for non-public groups
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$title = $html->find('title', 0);
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return $title->plaintext !== 'Log in to Facebook | Facebook';
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}
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private function extractGroupName($html)
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{
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$ogtitle = $html->find('._de1', 0)
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or returnServerError('Unable to find group title!');
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return html_entity_decode($ogtitle->plaintext, ENT_QUOTES);
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}
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private function extractGroupPostURI($post)
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{
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$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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$arr = explode('?', $anchor->href, 2);
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return $arr[0];
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}
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}
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return null;
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}
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private function extractGroupPostContent($post)
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{
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$content = $post->find('div._5rgt', 0)
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or returnServerError('Unable to find user content!');
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$context_text = $content->innertext;
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if ($content->next_sibling() !== null) {
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$context_text .= $content->next_sibling()->innertext;
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}
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return $context_text;
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}
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private function extractGroupPostAuthor($post)
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{
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$element = $post->find('h3 a', 0)
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or returnServerError('Unable to find author information!');
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return $element->plaintext;
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}
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private function extractGroupPostEnclosures($post)
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{
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$elements = $post->find('span._6qdm');
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if ($post->find('div._5rgt', 0)->next_sibling() !== null) {
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array_push($elements, ...$post->find('div._5rgt', 0)->next_sibling()->find('i.img'));
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}
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$enclosures = [];
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$background_img_regex = '/background-image: ?url\\((.+?)\\);/';
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foreach ($elements as $enclosure) {
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if (preg_match($background_img_regex, $enclosure, $matches) > 0) {
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$bg_img_value = trim(html_entity_decode($matches[1], ENT_QUOTES), "'\"");
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$bg_img_url = urldecode(preg_replace('/\\\([0-9a-z]{2}) /', '%$1', $bg_img_value));
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$enclosures[] = urldecode($bg_img_url);
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}
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}
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return empty($enclosures) ? null : $enclosures;
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}
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private function extractGroupPostTitle($post)
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{
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$element = $post->find('h3', 0)
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or returnServerError('Unable to find title!');
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if (strpos($element->plaintext, 'shared') === false) {
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$content = strip_tags($this->extractGroupPostContent($post));
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return $this->extractGroupPostAuthor($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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{
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if (filter_var($user, FILTER_VALIDATE_URL)) {
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$urlparts = parse_url($user);
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$this->validateHost($urlparts['host']);
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if (
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!array_key_exists('path', $urlparts)
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|| $urlparts['path'] === '/'
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) {
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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 $user;
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}
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}
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/**
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* Bypass external link redirection
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*/
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private function unescapeFacebookLink($content)
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{
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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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}
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return ' href="' . $link . '"';
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}
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}, $content);
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}
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/**
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* Remove Facebook's tracking code
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*/
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private function removeTrackingCodes($content)
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{
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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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}, $content);
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}
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/**
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* Convert textual representation of emoticons back to ASCII emoticons.
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* i.e. "<i><u>smile emoticon</u></i>" => ":)"
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*/
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private function unescapeFacebookEmote($content)
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{
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return preg_replace_callback('/<i><u>([^ <>]+) ([^<>]+)<\/u><\/i>/i', function ($matches) {
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static $facebook_emoticons = [
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'smile' => ':)',
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'frown' => ':(',
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'tongue' => ':P',
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'grin' => ':D',
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'gasp' => ':O',
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'wink' => ';)',
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'pacman' => ':<',
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'grumpy' => '>_<',
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'unsure' => ':/',
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'cry' => ':\'(',
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'kiki' => '^_^',
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'glasses' => '8-)',
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'sunglasses' => 'B-)',
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'heart' => '<3',
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'devil' => ']:D',
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'angel' => '0:)',
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'squint' => '-_-',
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'confused' => 'o_O',
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'upset' => 'xD',
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'colonthree' => ':3',
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'like' => '👍'];
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$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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}
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}
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}
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}
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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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{
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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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$captcha_fields = [];
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foreach ($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($message);
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}
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/**
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* Checks if a capture response was received and tries to load the contents
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* @return mixed null if no capture response was received, simplhtmldom document otherwise
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*/
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private function handleCaptchaResponse()
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{
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if (isset($_POST['captcha_response'])) {
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if (session_status() == PHP_SESSION_NONE) {
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session_start();
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}
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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 = [
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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 = [
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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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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 = $this->handleCaptchaResponse();
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|
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// Retrieve page contents
|
|
if (is_null($html)) {
|
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if (getEnv('HTTP_ACCEPT_LANGUAGE')) {
|
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$header = ['Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE')];
|
|
} else {
|
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$header = [];
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}
|
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|
|
$url = $this->getURI();
|
|
$html = getSimpleHTMLDOM($url, $header);
|
|
}
|
|
|
|
// 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 whether 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.');
|
|
}
|
|
|
|
$mainColumn = $html->find('#pagelet_timeline_main_column');
|
|
if (!$mainColumn) {
|
|
throw new \Exception(sprintf('Unable to find anything useful in %s', $url));
|
|
}
|
|
|
|
$element = $mainColumn[0]
|
|
->children(0)
|
|
->children(0)
|
|
->next_sibling()
|
|
->children(0);
|
|
|
|
if (isset($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 {
|
|
$posts = [$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;
|
|
}
|
|
|
|
$item = [];
|
|
|
|
if (count($post->find('abbr')) > 0) {
|
|
$content = $post->find('.userContentWrapper', 0);
|
|
|
|
// This array specifies filters applied to all posts in order of appearance
|
|
$content_filters = [
|
|
'._5mly', // Remove embedded videos (the preview image remains)
|
|
'._2ezg', // Remove "Views ..."
|
|
'.hidden_elem', // Remove hidden elements (they are hidden anyway)
|
|
'.timestampContent', // Remove relative timestamp
|
|
'._6spk', // Remove redundant separator
|
|
];
|
|
|
|
foreach ($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 = $this->unescapeFacebookLink($content);
|
|
|
|
// Clean useless html tag properties and fix link closing tags
|
|
foreach (
|
|
[
|
|
'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);
|
|
|
|
$this->unescapeFacebookEmote($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 = $this->removeTrackingCodes($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 = $post->find('abbr')[0]->parent()->getAttribute('href');
|
|
|
|
// Extract fbid and patch link
|
|
if (strpos($uri, '?') !== false) {
|
|
$query = substr($uri, strpos($uri, '?') + 1);
|
|
parse_str($query, $query_params);
|
|
if (isset($query_params['story_fbid'])) {
|
|
$uri = self::URI . $query_params['story_fbid'];
|
|
} else {
|
|
$uri = substr($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) {
|
|
$item['enclosures'] = [$profilePic];
|
|
}
|
|
|
|
$this->items[] = $item;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endregion (User)
|
|
}
|