Rss-Bridge/bridges/FacebookBridge.php
ORelio de8cee6a1c Catching up | [Main] Debug mode, parse utils, MIME | [Bridges] Add/Improve 20 bridges (#802)
* Debug mode improvements

 - Improve debug warning message
 - Restore error reporting in debug mode
 - Fix 'notice' messages for unset fields

* Add parsing utility functions

html.php
 - extractFromDelimiters
 - stripWithDelimiters
 - stripRecursiveHTMLSection
 - markdownToHtml (partial)

bridges
 - remove now-duplicate functions
 - call functions from html.php instead

* [Anidex] New bridge

Anime torrent tracker

* [Anime-Ultime] Restore thumbnail

* [CNET] Recreate bridge

Full rewrite as the previous one was broken

* [Dilbert] Minor URI fix

Use new self::URI property

* [EstCeQuonMetEnProd] Fix content extraction

Bridge was broken

* [Facebook] Fix "SpSonsSoriSsés" label

... which was taking space in item title

* [Futura-Sciences] Use HTTPS, More cleanup

Use HTTPS as FS now offer HTTPS
Clean additional useless HTML elements

* [GBATemp] Multiple fixes

- Fix categories: missing "break" statements
- Restore thumbnail as enclosure
- Fix date extraction
- Fix user blog post extraction
- Use getSimpleHTMLDOMCached

* [JapanExpo] Fix bridge, HTTPS, thumbnails

- Fix getSimpleHTMLDOMCached call
- Upgrade to HTTPS as JE now offers HTTPS
- Restore thumbnails as enclosures

* [LeMondeInformatique] Fix bridge, HTTPS

- Upgrade to HTTPS as LMI now offers HTTPS
- Restore thumbnails using small images
- Fix content extraction
- Fix text encoding issue

* [Nextgov] Fix content extraction

- Restore thumbnail and use small image
- Field extraction fixes

* [NextInpact] Add categories and filtering by type

- Offer all RSS feeds
- Allow filtering by article type
- Implement extraction for brief articles
- Remove article limit, many brief articles are publied all at once

* [NyaaTorrents] New bridge

Anime torrent tracker

* [Releases3DS] Cache content, restore thumbnail

- Use getSimpleHTMLDOMCached
- Restore thumbnail as enclosure

* [TheHackerNews] Fix bridge

 - Fix content extraction including article body
 - Restore thumbnail as enclosure

* [WeLiveSecurity] HTTPS, Fix content extraction

- Upgrade to HTTPS as WLS now offers HTTPS
- Fix content extraction including article body

* [WordPress] Reduce timeout, more content selectors

- Reduce timeout to use default one (1h)
- Add new content selector (articleBody)
- Find thumbnail and set as enclosure
- Fix <script> cleanup

* [YGGTorrent] Increase limit, use cache

- Increase item limit as uploads are very frequent
- Use getSimpleHTMLDOMCached

* [ZDNet] Rewrite with FeedExpander

- Upgrade to HTTPS as ZD now offers HTTPS
- Use FeedExpander for secondary fields
- Fix content extraction for article body

* [Main] Handle MIME type for enclosures

Many feed readers will ignore enclosures (e.g. thumbnails) with no MIME type. This commit adds automatic MIME type detection based on file extension (which may be inaccurate but is the only way without fetching the content).

One can force enclosure type using #.ext anchor (hacky, needs improving)

* [FeedExpander] Improve field extraction

- Add support for passing enclosures
- Improve author and uri extraction
- Fix 'notice' PHP error messages

* [Pull] Coding style fixes for #802

* [Pull] Implementing changes for #802

 - Fix coding style issues with str append
 - Remove useless CACHE_TIMEOUT
 - Use count() instead of $limit
 - Use defaultLinkTo() + handle strings
 - Use http_build_query()
 - Fix missing </em>
 - Remove error_reporting(0)
 - warning CSS (@LogMANOriginal)
 - Fix typo in FeedExpander comment

* [Main] More documentation for markdownToHtml

See #802 for more details
2018-09-09 20:20:13 +01:00

579 lines
15 KiB
PHP

<?php
class FacebookBridge extends BridgeAbstract {
const MAINTAINER = 'teromene, logmanoriginal';
const NAME = 'Facebook';
const URI = 'https://www.facebook.com/';
const CACHE_TIMEOUT = 300; // 5min
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(
'User' => array(
'u' => array(
'name' => 'Username',
'required' => true
),
'media_type' => array(
'name' => 'Media type',
'type' => 'list',
'required' => false,
'values' => array(
'All' => 'all',
'Video' => 'video',
'No Video' => 'novideo'
),
'defaultValue' => 'all'
),
'skip_reviews' => array(
'name' => 'Skip reviews',
'type' => 'checkbox',
'required' => false,
'defaultValue' => false,
'title' => 'Feed includes reviews when checked'
)
),
'Group' => array(
'g' => array(
'name' => 'Group',
'type' => 'text',
'required' => true,
'exampleValue' => 'https://www.facebook.com/groups/743149642484225',
'title' => 'Insert group name or facebook group URL'
)
)
);
private $authorName = '';
private $groupName = '';
public function getURI() {
$uri = self::URI;
switch($this->queriedContext) {
case 'Group':
$uri .= 'groups/' . $this->sanitizeGroup(filter_var($this->getInput('g'), FILTER_SANITIZE_URL));
break;
}
return $uri .= '?_fb_noscript=1';
}
public function collectData() {
switch($this->queriedContext) {
case 'Group':
$this->collectGroupData();
break;
case 'User':
$this->collectUserData();
break;
default:
returnClientError('Unknown context: "' . $this->queriedContext . '"!');
}
}
#region Group
private function collectGroupData() {
$header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE') . "\r\n");
$html = getSimpleHTMLDOM($this->getURI(), $header)
or returnServerError('Failed loading facebook page: ' . $this->getURI());
if(!$this->isPublicGroup($html)) {
returnClientError('This group is not public! RSS-Bridge only supports public groups!');
}
defaultLinkTo($html, substr(self::URI, 0, strlen(self::URI) - 1));
$this->groupName = $this->extractGroupName($html);
$posts = $html->find('div.userContentWrapper')
or returnServerError('Failed finding posts!');
foreach($posts as $post) {
$item = array();
$item['uri'] = $this->extractGroupURI($post);
$item['title'] = $this->extractGroupTitle($post);
$item['author'] = $this->extractGroupAuthor($post);
$item['content'] = $this->extractGroupContent($post);
$item['timestamp'] = $this->extractGroupTimestamp($post);
$item['enclosures'] = $this->extractGroupEnclosures($post);
$this->items[] = $item;
}
}
private function sanitizeGroup($group) {
if(filter_var(
$group,
FILTER_VALIDATE_URL,
FILTER_FLAG_HOST_REQUIRED | FILTER_FLAG_PATH_REQUIRED)) {
// User provided a URL
$urlparts = parse_url($group);
if($urlparts['host'] !== parse_url(self::URI)['host']
&& 'www.' . $urlparts['host'] !== parse_url(self::URI)['host']) {
returnClientError('The host you provided is invalid! Received "'
. $urlparts['host']
. '", expected "'
. parse_url(self::URI)['host']
. '"!');
}
return explode('/', $urlparts['path'])[2];
} elseif(strpos($group, '/') !== false) {
returnClientError('The group you provided is invalid: ' . $group);
} else {
return $group;
}
}
private function isPublicGroup($html) {
// Facebook redirects to the groups about page for non-public groups
$about = $html->find('#pagelet_group_about', 0);
return !($about);
}
private function extractGroupName($html) {
$ogtitle = $html->find('meta[property="og:title"]', 0)
or returnServerError('Unable to find group title!');
return htmlspecialchars_decode($ogtitle->content, ENT_QUOTES);
}
private function extractGroupURI($post) {
$elements = $post->find('a')
or returnServerError('Unable to find URI!');
foreach($elements as $anchor) {
// Find the one that is a permalink
if(strpos($anchor->href, 'permalink') !== false) {
return $anchor->href;
}
}
return null;
}
private function extractGroupContent($post) {
$content = $post->find('div.userContent', 0)
or returnServerError('Unable to find user content!');
return $content->innertext . $content->next_sibling()->innertext;
}
private function extractGroupTimestamp($post) {
$element = $post->find('abbr[data-utime]', 0)
or returnServerError('Unable to find timestamp!');
return $element->getAttribute('data-utime');
}
private function extractGroupAuthor($post) {
$element = $post->find('img', 0)
or returnServerError('Unable to find author information!');
return $element->{'aria-label'};
}
private function extractGroupEnclosures($post) {
$elements = $post->find('div.userContent', 0)->next_sibling()->find('img');
$enclosures = array();
foreach($elements as $enclosure) {
$enclosures[] = $enclosure->src;
}
return empty($enclosures) ? null : $enclosures;
}
private function extractGroupTitle($post) {
$element = $post->find('h5', 0)
or returnServerError('Unable to find title!');
if(strpos($element->plaintext, 'shared') === false) {
$content = strip_tags($this->extractGroupContent($post));
return $this->extractGroupAuthor($post)
. ' posted: '
. substr(
$content,
0,
strpos(wordwrap($content, 64), "\n")
)
. '...';
}
return $element->plaintext;
}
#endregion
private function collectUserData(){
//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];
};
$html = null;
//Handle captcha response sent by the viewer
if (isset($_POST['captcha_response'])) {
if (session_status() == PHP_SESSION_NONE)
session_start();
if (isset($_SESSION['captcha_fields'], $_SESSION['captcha_action'])) {
$captcha_action = $_SESSION['captcha_action'];
$captcha_fields = $_SESSION['captcha_fields'];
$captcha_fields['captcha_response'] = preg_replace('/[^a-zA-Z0-9]+/', '', $_POST['captcha_response']);
$header = array("Content-type:
application/x-www-form-urlencoded\r\nReferer: $captcha_action\r\nCookie: noscript=1\r\n");
$opts = array(
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => http_build_query($captcha_fields)
);
$html = getContents($captcha_action, $header, $opts);
if($html === false) {
returnServerError('Failed to submit captcha response back to Facebook');
}
unset($_SESSION['captcha_fields']);
$html = str_get_html($html);
}
unset($_SESSION['captcha_fields']);
unset($_SESSION['captcha_action']);
}
//Retrieve page contents
if(is_null($html)) {
$header = array('Accept-Language: ' . getEnv('HTTP_ACCEPT_LANGUAGE') . "\r\n");
// Check if the user provided a fully qualified URL
if (filter_var($this->getInput('u'), FILTER_VALIDATE_URL)) {
$urlparts = parse_url($this->getInput('u'));
if($urlparts['host'] !== parse_url(self::URI)['host']) {
returnClientError('The host you provided is invalid! Received "'
. $urlparts['host']
. '", expected "'
. parse_url(self::URI)['host']
. '"!');
}
if(!array_key_exists('path', $urlparts)
|| $urlparts['path'] === '/') {
returnClientError('The URL you provided doesn\'t contain the user name!');
}
$user = explode('/', $urlparts['path'])[1];
$html = getSimpleHTMLDOM(self::URI . urlencode($user) . '?_fb_noscript=1', $header)
or returnServerError('No results for this query.');
} else {
// First character cannot be a forward slash
if(strpos($this->getInput('u'), '/') === 0) {
returnClientError('Remove leading slash "/" from the username!');
}
if(!strpos($this->getInput('u'), '/')) {
$html = getSimpleHTMLDOM(self::URI . urlencode($this->getInput('u')) . '?_fb_noscript=1', $header)
or returnServerError('No results for this query.');
} else {
$html = getSimpleHTMLDOM(self::URI . 'pages/' . $this->getInput('u') . '?_fb_noscript=1', $header)
or returnServerError('No results for this query.');
}
}
}
//Handle captcha form?
$captcha = $html->find('div.captcha_interstitial', 0);
if (!is_null($captcha)) {
//Save form for submitting after getting captcha response
if (session_status() == PHP_SESSION_NONE)
session_start();
$captcha_fields = array();
foreach ($captcha->find('input, button') as $input)
$captcha_fields[$input->name] = $input->value;
$_SESSION['captcha_fields'] = $captcha_fields;
$_SESSION['captcha_action'] = $captcha->find('form', 0)->action;
//Show captcha filling form to the viewer, proxying the captcha image
$img = base64_encode(getContents($captcha->find('img', 0)->src));
http_response_code(500);
header('Content-Type: text/html');
$message = <<<EOD
<form method="post" action="?{$_SERVER['QUERY_STRING']}">
<h2>Facebook captcha challenge</h2>
<p>Unfortunately, rss-bridge cannot fetch the requested page.<br />
Facebook wants rss-bridge to resolve the following captcha:</p>
<p><img src="data:image/png;base64,{$img}" /></p>
<p><b>Response:</b> <input name="captcha_response" placeholder="please fill in" />
<input type="submit" value="Submit!" /></p>
</form>
EOD;
die($message);
}
//No captcha? We can carry on retrieving page contents :)
//First, we check wether the page is public or not
$loginForm = $html->find('._585r', 0);
if($loginForm != null) {
returnServerError('You must be logged in to view this page. This is not supported by RSS-Bridge.');
}
$element = $html
->find('#pagelet_timeline_main_column')[0]
->children(0)
->children(0)
->children(0)
->next_sibling()
->children(0);
if(isset($element)) {
defaultLinkTo($element, self::URI);
$author = str_replace(' | Facebook', '', $html->find('title#pageTitle', 0)->innertext);
$profilePic = 'https://graph.facebook.com/'
. $this->getInput('u')
. '/picture?width=200&amp;height=200#.image';
$this->authorName = $author;
foreach($element->children() as $cell) {
// Manage summary posts
if(strpos($cell->class, '_3xaf') !== false) {
$posts = $cell->children();
} else {
$posts = array($cell);
}
// Optionally skip reviews
if($this->getInput('skip_reviews')
&& !is_null($cell->find('#review_composer_container', 0))) {
continue;
}
foreach($posts as $post) {
// Check media type
switch($this->getInput('media_type')) {
case 'all': break;
case 'video':
if(empty($post->find('[aria-label=Video]'))) continue 2;
break;
case 'novideo':
if(!empty($post->find('[aria-label=Video]'))) continue 2;
break;
default: break;
}
$item = array();
if(count($post->find('abbr')) > 0) {
//Retrieve post contents
$content = preg_replace(
'/(?i)><div class=\"clearfix([^>]+)>(.+?)div\ class=\"userContent\"/i',
'',
$post);
$content = preg_replace(
'/(?i)><div class=\"_59tj([^>]+)>(.+?)<\/div><\/div><a/i',
'',
$content);
$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>');
//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
);
//Retrieve date of the post
$date = $post->find('abbr')[0];
if(isset($date) && $date->hasAttribute('data-utime')) {
$date = $date->getAttribute('data-utime');
} else {
$date = 0;
}
//Build title from username and content
$title = $author;
if(strlen($title) > 24)
$title = substr($title, 0, strpos(wordwrap($title, 24), "\n")) . '...';
$title = $title . ' | ' . strip_tags($content);
if(strlen($title) > 64)
$title = substr($title, 0, strpos(wordwrap($title, 64), "\n")) . '...';
$uri = $post->find('abbr')[0]->parent()->getAttribute('href');
if (false !== strpos($uri, '?')) {
$uri = substr($uri, 0, strpos($uri, '?'));
}
//Build and add final item
$item['uri'] = htmlspecialchars_decode($uri);
$item['content'] = htmlspecialchars_decode($content);
$item['title'] = $title;
$item['author'] = $author;
$item['timestamp'] = $date;
if(strpos($item['content'], '<img') === false)
$item['enclosures'] = array($profilePic);
$this->items[] = $item;
}
}
}
}
}
public function getName(){
switch($this->queriedContext) {
case 'User':
if(!empty($this->authorName)) {
return isset($this->extraInfos['name']) ? $this->extraInfos['name'] : $this->authorName
. ' - Facebook Bridge';
}
break;
case 'Group':
if(!empty($this->groupName)) {
return $this->groupName . ' - Facebook Bridge';
}
break;
}
return parent::getName();
}
}