232 lines
8.3 KiB
PHP
232 lines
8.3 KiB
PHP
<?php
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class FacebookBridge extends BridgeAbstract{
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public function loadMetadatas() {
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$this->maintainer = "teromene";
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$this->name = "Facebook";
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$this->uri = "http://www.facebook.com/";
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$this->description = "Input a page title or a profile log. For a profile log, please insert the parameter as follow : myExamplePage/132621766841117";
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$this->update = "2016-08-06";
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$this->parameters[] =
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'[
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{
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"name" : "Username",
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"identifier" : "u",
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"required" : "required"
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}
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]';
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}
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public function collectData(array $param) {
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//Extract a string using start and end delimiters
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function ExtractFromDelimiters($string, $start, $end) {
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if (strpos($string, $start) !== false) {
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$section_retrieved = substr($string, strpos($string, $start) + strlen($start));
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$section_retrieved = substr($section_retrieved, 0, strpos($section_retrieved, $end));
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return $section_retrieved;
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} return false;
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}
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//Utility function for cleaning a Facebook link
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$unescape_fb_link = 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, '/') === 0)
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$link = 'https://www.facebook.com'.$link.'"';
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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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};
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//Utility function for converting facebook emoticons
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$unescape_fb_emote = function ($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 $matches[0];
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};
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$html = null;
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//Handle captcha response sent by the viewer
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if (isset($_POST['captcha_response']))
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{
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if (session_status() == PHP_SESSION_NONE)
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session_start();
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if (isset($_SESSION['captcha_fields'], $_SESSION['captcha_action']))
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{
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$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]+/", "", $_POST['captcha_response']);
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$http_options = array(
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'http' => array(
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'method' => 'POST',
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'user_agent'=> ini_get('user_agent'),
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'header'=>array("Content-type: application/x-www-form-urlencoded\r\nReferer: $captcha_action\r\nCookie: noscript=1\r\n"),
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'content' => http_build_query($captcha_fields),
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),
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);
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$context = stream_context_create($http_options);
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$html = file_get_contents($captcha_action, false, $context);
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if ($html === FALSE) { $this->returnError('Failed to submit captcha response back to Facebook', 500); }
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unset($_SESSION['captcha_fields']);
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$html = str_get_html($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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//Retrieve page contents
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if (is_null($html)) {
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if (isset($param['u'])) {
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if (!strpos($param['u'], "/")) {
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$html = $this->file_get_html('https://www.facebook.com/'.urlencode($param['u']).'?_fb_noscript=1') or $this->returnError('No results for this query.', 404);
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} else {
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$html = $this->file_get_html('https://www.facebook.com/pages/'.$param['u'].'?_fb_noscript=1') or $this->returnError('No results for this query.', 404);
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}
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} else {
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$this->returnError('You must specify a Facebook username.', 400);
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}
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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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{
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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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$captcha_fields = array();
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foreach ($captcha->find('input, button') as $input)
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$captcha_fields[$input->name] = $input->value;
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$_SESSION['captcha_fields'] = $captcha_fields;
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$_SESSION['captcha_action'] = 'https://www.facebook.com'.$captcha->find('form', 0)->action;
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//Show captcha filling form to the viewer, proxying the captcha image
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$img = base64_encode(file_get_contents($captcha->find('img', 0)->src));
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header('HTTP/1.1 500 '.Http::getMessageForCode(500));
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header('Content-Type: text/html');
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die('<form method="post" action="?'.$_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,'.$img.'" /></p>'
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.'<p><b>Response:</b> <input name="captcha_response" placeholder="please fill in" />'
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.'<input type="submit" value="Submit!" /></p>'
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.'</form>');
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}
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//No captcha? We can carry on retrieving page contents :)
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$element = $html->find('#pagelet_timeline_main_column')[0]->children(0)->children(0)->children(0)->next_sibling()->children(0);
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if(isset($element)) {
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$author = str_replace(' | Facebook', '', $html->find('title#pageTitle', 0)->innertext);
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$profilePic = 'https://graph.facebook.com/'.$param['u'].'/picture?width=200&height=200';
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$this->name = $author;
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foreach($element->children() as $post) {
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$item = new \Item();
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if (count($post->find('abbr')) > 0) {
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//Retrieve post contents
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$content = preg_replace('/(?i)><div class=\"clearfix([^>]+)>(.+?)div\ class=\"userContent\"/i', '', $post);
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$content = preg_replace('/(?i)><div class=\"_59tj([^>]+)>(.+?)<\/div><\/div><a/i', '', $content);
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$content = preg_replace('/(?i)><div class=\"_3dp([^>]+)>(.+?)div\ class=\"[^u]+userContent\"/i', '', $content);
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$content = preg_replace('/(?i)><div class=\"_4l5([^>]+)>(.+?)<\/div>/i', '', $content);
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//Remove html nodes, keep only img, links, basic formatting
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$content = strip_tags($content,'<a><img><i><u>');
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//Adapt link hrefs: convert relative links into absolute links and bypass external link redirection
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$content = preg_replace_callback('/ href=\"([^"]+)\"/i', $unescape_fb_link, $content);
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//Clean useless html tag properties and fix link closing tags
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foreach (array('onmouseover', 'onclick', 'target', 'ajaxify', 'tabindex',
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'class', 'style', 'data-[^=]*', 'aria-[^=]*', 'role', 'rel', 'id') as $property_name)
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$content = preg_replace('/ '.$property_name.'=\"[^"]*\"/i', '', $content);
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$content = preg_replace('/<\/a [^>]+>/i', '</a>', $content);
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//Convert textual representation of emoticons eg "<i><u>smile emoticon</u></i>" back to ASCII emoticons eg ":)"
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$content = preg_replace_callback('/<i><u>([^ <>]+) ([^<>]+)<\/u><\/i>/i', $unescape_fb_emote, $content);
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//Retrieve date of the post
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$date = $post->find("abbr")[0];
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if(isset($date) && $date->hasAttribute('data-utime')) {
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$date = $date->getAttribute('data-utime');
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} else {
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$date = 0;
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}
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//Build title from username and content
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$title = $author;
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if (strlen($title) > 24)
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$title = substr($title, 0, strpos(wordwrap($title, 24), "\n")).'...';
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$title = $title.' | '.strip_tags($content);
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if (strlen($title) > 64)
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$title = substr($title, 0, strpos(wordwrap($title, 64), "\n")).'...';
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//Use first image as thumbnail if available, or profile pic fallback
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$thumbnail = $post->find('img', 1);
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if (is_object($thumbnail))
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$thumbnail = $thumbnail->src;
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else $thumbnail = $profilePic;
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//Build and add final item
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$item->uri = 'https://facebook.com'.$post->find('abbr')[0]->parent()->getAttribute('href');
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$item->thumbnailUri = $thumbnail;
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$item->content = $content;
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$item->title = $title;
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$item->author = $author;
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$item->timestamp = $date;
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$this->items[] = $item;
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}
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}
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}
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}
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public function setDatas(array $param){
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if (isset($param['captcha_response']))
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unset($param['captcha_response']);
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parent::setDatas($param);
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}
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public function getName() {
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return (isset($this->name) ? $this->name.' - ' : '').'Facebook Bridge';
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}
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public function getCacheDuration() {
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return 300; // 5 minutes
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}
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}
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