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api.php
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api.php
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<?php
function feedFeach($listURL) {
global $base, $showAll, $json;
$base = null;
$proxy = null;
$json = [
'info' => [],
'item' => [],
'status' => [],
'loaded' => [],
'session' => $listURL
];
function absURL($url) {
global $base;
if (!$url) return $url;
$url = trim((string) $url);
if (!$url) return $base;
if (parse_url($url, PHP_URL_SCHEME) || strpos($url, '//') === 0) return $url;
if ($url[0] === '/') return $base . $url;
if (strpos($base, '/', 9) === false) $base .= '/';
return substr($base, 0, strrpos($base,'/') + 1) . $url;
}
function inTimeRange($time) {
global $maxRange;
if ($maxRange === 'nolimit') return true;
$now = new DateTime;
$ago = new DateTime((string) $time);
$diff = $now->diff($ago);
return !$diff->m && $maxRange >= $diff->d;
}
function elapsedTime($time, $full = false) {
$now = new DateTime;
$ago = new DateTime((string) $time);
$diff = (array) $now->diff($ago);
$diff['w'] = floor($diff['d'] / 7);
$diff['d'] -= $diff['w'] * 7;
$str = [
'y' => 'year',
'm' => 'month',
'w' => 'week',
'd' => 'day',
'h' => 'hour',
'i' => 'minute',
's' => 'second',
];
foreach ($str as $k => &$v) {
if (!empty($diff[$k])) {
$v = $diff[$k] . ' ' . $v . ($diff[$k] > 1 ? 's' : '');
} else {
unset($str[$k]);
}
}
if (!$full) $str = array_slice($str, 0, 1);
return $str ? implode(', ', $str) . ' ago' : 'just now';
}
function datetime($time) {
return date('Y-m-d\TH:i\Z', strtotime((string) $time));
}
function summarizeText($str) {
global $summarizeLenght;
$str = preg_replace('/\s+/', ' ', strip_tags((string) $str));
if (strlen($str) > $summarizeLenght) $str = trim(mb_substr($str, 0, $summarizeLenght, 'utf-8')) . '…';
return $str;
}
function newRequest() {
global $json;
if (count($json['session'])) {
$diff = array_diff($json['session'], $json['loaded']);
if (count($diff)) receiveData($diff);
}
}
function setData($rss, $searchURL, $feedURL = null) {
global $base, $json, $maxCount, $status, $isPersonalized, $imageShow, $defaultURL;
$newURL = isset($_SESSION['personalized']) || $json['session'] !== $defaultURL;
$feedURL = isset($feedURL) ? $feedURL :
(isset($_SESSION['listURL'][$searchURL]) && isset($_SESSION['listURL'][$searchURL]['feed']) ? $_SESSION['listURL'][$searchURL]['feed'] : null);
if (empty($_SESSION['personalized'])) {
$imageShow = isset($_SESSION['imageShow']) ? $_SESSION['imageShow'] : $newURL;
$isPersonalized = $newURL;
$maxCount = $newURL ? false : $maxCount;
}
if ($rss) {
$i = 0;
$namespaces = $rss->getNamespaces(true);
$imageQuery = '//img[@src][not(contains(@src, "advertisement.gif")) and not(contains(@src, ".php"))]'; // Skip https://www.smashingmagazine.com/feed/ ads
$dom = new DOMDocument;
$dom->preserveWhiteSpace = false;
libxml_use_internal_errors(true);
if (@$rss->channel->item) { // RSS2.0
$json['info'][$searchURL] = array_filter([
'type' => 'RSS2.0',
'base' => $base,
'title' => summarizeText($rss->channel->title),
'link' => absURL($rss->channel->link),
'description' => summarizeText($rss->channel->description),
'lastBuildDate' => elapsedTime($rss->channel->lastBuildDate),
'datetime' => datetime($rss->channel->lastBuildDate),
'search' => $searchURL,
'feed' => $feedURL
]);
$json['info'][$searchURL]['count'] = 0;
$source = $json['info'][$searchURL]['title'];
foreach ($rss->channel->item as $item) {
if (inTimeRange($item->pubDate)) {
$image = @$item->children($namespaces['media'])->thumbnail;
if ($image) $image = $image->attributes()->url;
if (!$image) {
$media = @$item->children($namespaces['media'])->content;
if ($isPersonalized && $imageShow) {
if ($media && (string) $media->attributes()->medium === 'image') {
// Workaround for http://rss.nytimes.com/services/xml/rss/nyt/InternationalHome.xml
$image = $media->attributes()->url;
} else {
$image = $media ? @$media->children($namespaces['media'])->thumbnail->attributes()->url : null;
}
}
$description = $media ? @$media->children($namespaces['media'])->description : null;
}
if (!$image && $isPersonalized && $imageShow &&
isset($item->description) && strlen($item->description)) {
$dom->loadHTML($item->description);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query($imageQuery);
if (!$nodes->length) {
$content = @$item->children($namespaces['content'])->encoded;
if ($content) {
$dom->loadHTML($content);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query($imageQuery);
}
}
if ($nodes->length) {
foreach ($nodes as $node) {
$image = $node->getAttribute('src');
break;
}
}
}
if (isset($item->title) && strlen($item->title)) {
array_push($json['item'], array_filter([
'title' => summarizeText($item->title),
'link' => absURL($item->link),
'image' => $isPersonalized && $imageShow ? absURL($image) : null,
'description' => summarizeText(isset($item->description) ? $item->description : $description),
'pubDate' => elapsedTime($item->pubDate),
'datetime' => datetime($item->pubDate),
'source' => $source
]));
$json['info'][$searchURL]['count'] += 1;
if ($maxCount && ++$i === $maxCount) break;
}
} else {
break;
}
}
if (!count($json['item'])) array_push($json['status'], $status['range']);
} else if (@$rss->item) { // RSS1.0
$json['info'][$searchURL] = array_filter([
'type' => 'RSS1.0',
'base' => $base,
'title' => summarizeText($rss->channel->title),
'link' => absURL($rss->channel->link),
'description' => summarizeText($rss->channel->description),
'lastBuildDate' => elapsedTime($rss->channel->lastBuildDate),
'datetime' => datetime($rss->channel->lastBuildDate),
'search' => $searchURL,
'feed' => $feedURL
]);
$json['info'][$searchURL]['count'] = 0;
$source = $json['info'][$searchURL]['title'];
foreach ($rss->item as $item) {
if (inTimeRange($item->children('http://purl.org/dc/elements/1.1/')->date)) {
$media = @$item->children($namespaces['content']);
$description = $media ? $media->description : null;
if ($isPersonalized && $imageShow) {
$image = $media && $media->encoded ? @$media->content->attributes()->url : null;
if (!$image) {
$dom->loadHTML($item->description);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query($imageQuery);
if (!$nodes->length) {
$media = @$item->children($namespaces['content']);
$content = $media ? $media->encoded : null;
if ($content) {
$dom->loadHTML($content);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query($imageQuery);
}
}
if ($nodes->length) {
foreach ($nodes as $node) {
$image = $node->getAttribute('src');
break;
}
}
}
}
if (isset($item->title) && strlen($item->title)) {
array_push($json['item'], array_filter([
'title' => summarizeText($item->title),
'link' => absURL($item->link),
'image' => $isPersonalized && $imageShow ? absURL($image) : null,
'description' => summarizeText($item->description),
'pubDate' => elapsedTime($item->children('http://purl.org/dc/elements/1.1/')->date),
'datetime' => datetime($item->children('http://purl.org/dc/elements/1.1/')->date),
'source' => $source
]));
$json['info'][$searchURL]['count'] += 1;
if ($maxCount && ++$i === $maxCount) break;
}
} else {
break;
}
}
if (!count($json['item'])) array_push($json['status'], $status['range']);
} else if (@$rss->entry) { // ATOM
$json['info'][$searchURL] = array_filter([
'type' => 'ATOM',
'base' => $base,
'title' => summarizeText(isset($rss->entry->title) ? $rss->entry->title : $rss->title),
'link' => absURL($rss->link[count($rss->link) - 1]->attributes()->href),
'lastBuildDate' => elapsedTime($rss->updated),
'datetime' => datetime($rss->updated),
'search' => $searchURL,
'feed' => $feedURL
]);
$json['info'][$searchURL]['count'] = 0;
$source = isset($json['info'][$searchURL]['title']) ? $json['info'][$searchURL]['title'] : null;
foreach ($rss->entry as $item) {
$date = $item->published;
$date = isset($date) ? $date : $item->updated;
if (inTimeRange($date)) {
// Youtube approach
$media = @$item->children($namespaces['media'])->group;
$image = $media ? @$media->children($namespaces['media'])->thumbnail->attributes()->url : null;
$description = $media ? @$media->children($namespaces['media'])->description : null;
if (!$image) {
$media = @$item->children($namespaces['media'])->media;
$image = $media ? @$media->children($namespaces['media'])->thumbnail->attributes()->url : null;
$description = $media ? @$media->children($namespaces['media'])->description : null;
}
if (!$image && $item->content && $isPersonalized && $imageShow) {
$dom->loadHTML($item->content);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query($imageQuery);
if ($nodes->length) {
foreach ($nodes as $node) {
$image = $node->getAttribute('src');
break;
}
}
}
if (isset($item->title) && strlen($item->title)) {
array_push($json['item'], array_filter([
'title' => summarizeText($item->title),
'link' => absURL($item->link->attributes()->href),
'image' => $isPersonalized && $imageShow ? absURL($image) : null,
'description' => summarizeText(isset($item->content) ? $item->content : $description),
'pubDate' => elapsedTime($date),
'datetime' => datetime($date),
'source' => $source
]));
$json['info'][$searchURL]['count'] += 1;
if ($maxCount && ++$i === $maxCount) break;
}
} else {
break;
}
}
if (!count($json['item'])) array_push($json['status'], $status['range']);
}
if ($newURL) {
// Set personalized SESSION
if (empty($_SESSION['listURL'])) {
$_SESSION['listURL'] = [];
}
if (empty($_SESSION['personalized'])) {
$_SESSION['personalized'] = true;
$_SESSION['imageShow'] = true;
}
if (empty($_SESSION['listURL'][$searchURL])) {
$_SESSION['listURL'][$searchURL] = [
'url' => $searchURL,
'link' => isset($json['info'][$searchURL]['link']) ? $json['info'][$searchURL]['link'] : null,
'title' => isset($json['info'][$searchURL]['title']) ? $json['info'][$searchURL]['title'] : null,
'description' => isset($json['info'][$searchURL]['description']) ? $json['info'][$searchURL]['description'] : null,
'type' => isset($json['info'][$searchURL]['type']) ? $json['info'][$searchURL]['type'] : null,
'feed' => isset($json['info'][$searchURL]['feed']) ? $json['info'][$searchURL]['feed'] : null
];
} else if (empty($_SESSION['listURL'][$searchURL]['feed'])) {
// Backwards compatibility (v2.0 2016/10/13)
$_SESSION['listURL'][$searchURL]['feed'] = isset($json['info'][$searchURL]['feed']) ? $json['info'][$searchURL]['feed'] : null;
}
$_SESSION['listURL'][$searchURL]['count'] = isset($json['info'][$searchURL]['count']) ? $json['info'][$searchURL]['count'] : 0;
}
}
}
function getProxyServer() {
$opt = (object) [
'server' => '127.0.0.1',
// Port 9150 if used Tor Browser Bundle
'port' => 9050,
'timeout' => 5
];
// https://stackoverflow.com/questions/6968228/how-will-i-know-if-my-curl-proxy-is-down
if (@fsockopen($opt->server, $opt->port, $errorNumber, $errorMessage, $opt->timeout)) {
return "$opt->server:$opt->port";
}
return "";
}
function receiveData($listURL, $result = '', $feedSearch = true, $originURL = null) {
global $base, $proxy, $json, $cacheDir, $cacheAge, $status;
$url = is_array($listURL) ? array_shift($listURL) : $listURL;
$originURL = isset($originURL) ? $originURL : $url;
array_push($json['loaded'], $originURL);
if (!$url) {
array_push($json['status'], $status['empty']);
return $json;
}
$url = preg_replace('/^(?!https?:\/\/)/', 'http://', $url);
$file = $cacheDir . '/' . md5($originURL);
$mtime = 0;
$time = time();
// if (!is_dir($cacheDir)) mkdir($cacheDir);
// if (file_exists($file)) $mtime = filemtime($file);
$mtime = @filemtime($file);
if ($mtime && ($mtime + $cacheAge >= $time)) {
// Return cached content
$content = file_get_contents($file);
$base = parse_url($url);
$base = $base['scheme'] . '://' . $base['host'];
setData(@simplexml_load_string($content, 'SimpleXMLElement', LIBXML_NOBLANKS | LIBXML_NOCDATA), $originURL);
newRequest();
return $json;
} else if (!validURL($url)) {
array_push($json['status'], $status['url']);
newRequest();
return $json;
} else if (!checkdnsrr(parse_url(trim($url), PHP_URL_HOST), 'A')) {
array_push($json['status'], $status['exist']);
newRequest();
return $json;
} else if ($ch = curl_init()) {
// Remove old cache
foreach (new DirectoryIterator($cacheDir) as $fileInfo) {
if ($fileInfo->isDot() || $fileInfo->getFilename() === 'README.md' ||
// Don't remove user session file
strpos($fileInfo->getFilename(), 'sess_') === 0) {
continue;
} else if ($time - $fileInfo->getCTime() >= $cacheAge * 2) {
@unlink($fileInfo->getRealPath());
}
}
$opt = [
CURLOPT_URL => $url,
// https://support.google.com/webmasters/answer/1061943
CURLOPT_USERAGENT => 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
CURLOPT_HEADER => false,
CURLOPT_REFERER => 'http://www.google.com',
CURLOPT_ENCODING => 'gzip, deflate',
CURLOPT_AUTOREFERER => true,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 5,
CURLOPT_CONNECTTIMEOUT => 15,
CURLOPT_TIMEOUT => 30
// CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_2_0
];
if (is_null($proxy)) {
$proxy = getProxyServer();
}
if ($proxy) {
$opt += [
// https://www.joe0.com/2017/03/06/how-to-anonymize-traffic-programmatically-by-using-phpcurl-and-tor-network/
CURLOPT_PROXY => $proxy,
CURLOPT_HTTPPROXYTUNNEL => 1,
CURLOPT_PROXYTYPE => 7
];
}
curl_setopt_array($ch, $opt);
$res = @curl_exec($ch);
$redir = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($redir !== $url) {
array_push($json['status'], 'Redirected to ' . $redir);
$url = preg_replace('/^(?!https?:\/\/)/', 'http://', $redir);
}
if ($httpcode !== 200 && $httpcode !== 302 && $httpcode !== 304) {
array_push($json['status'], sprintf($status['error'], $httpcode));
newRequest();
return $json;
} else if ($rss = @simplexml_load_string($res, 'SimpleXMLElement', LIBXML_NOBLANKS | LIBXML_NOCDATA)) {
file_put_contents($file, $res);
$base = parse_url($url);
$base = $base['scheme'] . '://' . $base['host'];
setData($rss, $originURL, $url);
} else if ($res && $feedSearch) {
$dom = new DOMDocument;
$dom->preserveWhiteSpace = false;
libxml_use_internal_errors(true);
$dom->loadHTML($res);
libxml_clear_errors();
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//link[@href][(@type="application/atom+xml" or @type="application/rss+xml" or @type="application/rdf+xml")]');
foreach ($nodes as $node) {
$urlUpdated = $node->getAttribute('href');
break;
}
if (isset($urlUpdated) && $urlUpdated !== $url) {
array_push($json['status'], $status['found'] . $urlUpdated);
return receiveData($urlUpdated, null, false, $originURL);
} else {
array_push($json['status'], sprintf($status['feed'], $originURL));
}
} else {
array_push($json['status'], sprintf($status['feed'], $originURL));
}
newRequest();
return $json;
} else {
array_push($json['status'], sprintf($status['access'], $originURL));
return $json;
}
}
newRequest();
return $json;
}
if (count($listURL)) {
$json = feedFeach($listURL);
if (!count($json['item'])) unset($json['item']);
if (!count($json['info'])) unset($json['info']);
if (!count($json['loaded'])) unset($json['loaded']);
if (!count($json['status'])) unset($json['status']);
if (isset($json['item'])) {
usort($json['item'], function($a, $b) {
return strtotime($b['datetime']) - strtotime($a['datetime']);
});
if ($maxCount) $json['item'] = array_slice($json['item'], 0, $maxCount);
if ($showAll) unset($json['status']);
}
unset($json['session']);
setSession();
}