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rss-bridge/bridges/FB2Bridge.php
2017-02-08 11:21:59 +00:00

234 lines
7 KiB
PHP

<?php
class FB2Bridge extends BridgeAbstract{
const MAINTAINER = "teromene";
const NAME = "Facebook Alternate";
const URI = "https://www.facebook.com/";
const CACHE_TIMEOUT = 1000;
const DESCRIPTION = "Input a page title or a profile log. For a profile log, please insert the parameter as follow : myExamplePage/132621766841117";
const PARAMETERS =array( array(
'u'=>array(
'name'=>'Username',
'required'=>true
)
));
public function collectData() {
function ExtractFromDelimiters($string, $start, $end) {
if (strpos($string, $start) !== false) {
$section_retrieved = substr($string, strpos($string, $start) + strlen($start));
$section_retrieved = substr($section_retrieved, 0, strpos($section_retrieved, $end));
return $section_retrieved;
} return false;
}
//Utility function for cleaning a Facebook link
$unescape_fb_link = function ($matches) {
if (is_array($matches) && count($matches) > 1) {
$link = $matches[1];
if (strpos($link, '/') === 0)
$link = self::URI.$link.'"';
if (strpos($link, 'facebook.com/l.php?u=') !== false)
$link = urldecode(ExtractFromDelimiters($link, 'facebook.com/l.php?u=', '&'));
return ' href="'.$link.'"';
}
};
//Utility function for converting facebook emoticons
$unescape_fb_emote = function ($matches) {
static $facebook_emoticons = array(
'smile' => ':)',
'frown' => ':(',
'tongue' => ':P',
'grin' => ':D',
'gasp' => ':O',
'wink' => ';)',
'pacman' => ':<',
'grumpy' => '>_<',
'unsure' => ':/',
'cry' => ':\'(',
'kiki' => '^_^',
'glasses' => '8-)',
'sunglasses' => 'B-)',
'heart' => '<3',
'devil' => ']:D',
'angel' => '0:)',
'squint' => '-_-',
'confused' => 'o_O',
'upset' => 'xD',
'colonthree' => ':3',
'like' => '&#x1F44D;');
$len = count($matches);
if ($len > 1)
for ($i = 1; $i < $len; $i++)
foreach ($facebook_emoticons as $name => $emote)
if ($matches[$i] === $name)
return $emote;
return $matches[0];
};
if($this->getInput('u') !== NULL) {
$page = "https://touch.facebook.com/" . $this->getInput('u');
$cookies = $this->getCookies($page);
$pageID = $this->getPageID($page, $cookies);
if($pageID === null) {
echo "Unable to get the page id. You should consider getting the ID by hand, then importing it into FB2Bridge";
die();
}
}
//Build the string for the first request
$requestString = "https://touch.facebook.com/pages_reaction_units/more/?page_id=" . $pageID . "&cursor={\"card_id\"%3A\"videos\"%2C\"has_next_page\"%3Atrue}&surface=mobile_page_home&unit_count=8";
$fileContent = file_get_contents($requestString);
$articleIndex = 0;
$maxArticle = 3;
$html = $this->buildContent($fileContent);
$author = $this->getInput('u');
foreach($html->find("article") as $content) {
$item = array();
$item['uri'] = "http://touch.facebook.com" . $content->find("div._52jc", 0)->find("a", 0)->getAttribute("href");
$content->find("header", 0)->innertext = "";
$content->find("footer", 0)->innertext = "";
//Remove html nodes, keep only img, links, basic formatting
$content = strip_tags($content,'<a><img><i><u><br><p>');
//Adapt link hrefs: convert relative links into absolute links and bypass external link redirection
$content = preg_replace_callback('/ href=\"([^"]+)\"/i', $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);
//Convert textual representation of emoticons eg "<i><u>smile emoticon</u></i>" back to ASCII emoticons eg ":)"
$content = preg_replace_callback('/<i><u>([^ <>]+) ([^<>]+)<\/u><\/i>/i', $unescape_fb_emote, $content);
$item['content'] = $content;
$title = $author;
if (strlen($title) > 24)
$title = substr($title, 0, strpos(wordwrap($title, 24), "\n")).'...';
$title = $title.' | '.strip_tags($content);
if (strlen($title) > 64)
$title = substr($title, 0, strpos(wordwrap($title, 64), "\n")).'...';
$item['title'] = $title;
$item['author'] = $author;
array_push($this->items, $item);
}
}
// Currently not used. Is used to get more than only 3 elements, as they appear on another page.
private function computeNextLink($string, $pageID) {
$regex = "/timeline_unit\\\\\\\\u00253A1\\\\\\\\u00253A([0-9]*)\\\\\\\\u00253A([0-9]*)\\\\\\\\u00253A([0-9]*)\\\\\\\\u00253A([0-9]*)/";
preg_match($regex, $string, $result);
return "https://touch.facebook.com/pages_reaction_units/more/?page_id=".$pageID."&cursor=%7B%22timeline_cursor%22%3A%22timeline_unit%3A1%3A".$result[1]."%3A".$result[2]."%3A".$result[3]."%3A".$result[4]."%22%2C%22timeline_section_cursor%22%3A%7B%7D%2C%22has_next_page%22%3Atrue%7D&surface=mobile_page_home&unit_count=3";
}
//Builds the HTML from the encoded JS that Facebook provides.
private function buildContent($pageContent) {
$regex = "/\\\"html\\\":\\\"(.*?)\\\",\\\"replace/";
preg_match($regex, $pageContent, $result);
return str_get_html(html_entity_decode(json_decode('"' . $result[1] . '"')));
}
//Builds the cookie from the page, as Facebook sometimes refuses to give the page if no cookie is provided.
private function getCookies($pageURL) {
$ctx = stream_context_create(array(
'http' => array(
'user_agent' => "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0",
'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'
)
)
);
$a = file_get_contents($pageURL, 0, $ctx);
//First request to get the cookie
$cookies = "";
foreach ($http_response_header as $hdr) {
if(strpos($hdr, "Set-Cookie") !== false) {
$cLine = explode(":", $hdr)[1];
$cLine = explode(";", $cLine)[0];
$cookies .= ";".$cLine;
}
}
return substr($cookies, 1);
}
//Get the page ID from the Facebook page.
private function getPageID($page, $cookies) {
$context = stream_context_create(array(
'http' => array(
'user_agent' => "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0",
'header' => 'Cookie: ' .$cookies
)
)
);
$pageContent = file_get_contents($page, 0, $context);
//Get the page ID if we don't have a captcha
$regex = "/page_id=([0-9]*)&/";
preg_match($regex, $pageContent, $matches);
if(count($matches) > 0) {
return $matches[1];
}
//Get the page ID if we do have a captcha
$regex = "/\"pageID\":\"([0-9]*)\"/";
preg_match($regex, $pageContent, $matches);
return $matches[1];
}
public function getName() {
return (isset($this->name) ? $this->name.' - ' : '').'Facebook Bridge';
}
public function getURI() {
return 'http://facebook.com';
}
public function getCacheDuration() {
return 60 * 60 * 3; // 5 minutes
}
}