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<?php
namespace Wallabag\CoreBundle\Helper;
final class Tools
{
/**
* Download a file (typically, for downloading pictures on web server).
*
* @param $url
*
* @return bool|mixed|string
*/
public static function getFile($url)
{
$timeout = 15;
$useragent = 'Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0';
if (in_array('curl', get_loaded_extensions())) {
# Fetch feed from URL
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
if (!ini_get('open_basedir') && !ini_get('safe_mode')) {
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, false);
# for ssl, do not verified certificate
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_AUTOREFERER, true);
# FeedBurner requires a proper USER-AGENT...
curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip, deflate');
curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
$data = curl_exec($curl);
$httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
curl_close($curl);
} else {
# create http context and add timeout and user-agent
$context = stream_context_create(
array(
'http' => array(
'timeout' => $timeout,
'header' => 'User-Agent: '.$useragent,
'follow_location' => true,
),
'ssl' => array(
'verify_peer' => false,
'allow_self_signed' => true,
),
)
);
# only download page lesser than 4MB
$data = @file_get_contents($url, false, $context, -1, 4000000);
if (isset($http_response_header) and isset($http_response_header[0])) {
$httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== false) or (strpos($http_response_header[0], '301 Moved Permanently') !== false));
}
}
# if response is not empty and response is OK
if (isset($data) and isset($httpcodeOK) and $httpcodeOK) {
# take charset of page and get it
preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
# if meta tag is found
if (!empty($meta[0])) {
preg_match('#charset="?(.*)"#si', $meta[0], $encoding);
# if charset is found set it otherwise, set it to utf-8
$html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8';
if (empty($encoding[1])) {
$encoding[1] = 'utf-8';
}
} else {
$html_charset = 'utf-8';
$encoding[1] = '';
}
# replace charset of url to charset of page
$data = str_replace('charset='.$encoding[1], 'charset='.$html_charset, $data);
return $data;
} else {
return false;
}
}
/**
* Encode a URL by using a salt.
*
* @param $string
*
* @return string
*/
public static function encodeString($string)
{
return sha1($string.SALT);
}
public static function generateToken()
{
if (ini_get('open_basedir') === '') {
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
// alternative to /dev/urandom for Windows
$token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
} else {
$token = substr(base64_encode(file_get_contents('/dev/urandom', false, null, 0, 20)), 0, 15);
}
} else {
$token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
}
return str_replace('+', '', $token);
}
/**
* For a given text, we calculate reading time for an article.
*
* @param $text
*
* @return float
*/
public static function getReadingTime($text)
{
return floor(str_word_count(strip_tags($text)) / 200);
}
}
|
