177 lines
3.6 KiB
PHP
177 lines
3.6 KiB
PHP
<?php
|
|
class backend{
|
|
|
|
public function __construct($scraper){
|
|
|
|
$this->scraper = $scraper;
|
|
}
|
|
|
|
/*
|
|
Proxy stuff
|
|
*/
|
|
public function get_ip(){
|
|
|
|
$pool = constant("config::PROXY_" . strtoupper($this->scraper));
|
|
if($pool === false){
|
|
|
|
// we don't want a proxy, fuck off!
|
|
return 'raw_ip::::';
|
|
}
|
|
|
|
// indent
|
|
$proxy_index_raw = apcu_inc("p." . $this->scraper);
|
|
|
|
$proxylist = file_get_contents("data/proxies/" . $pool . ".txt");
|
|
$proxylist = explode("\n", $proxylist);
|
|
|
|
// ignore empty or commented lines
|
|
$proxylist = array_filter($proxylist, function($entry){
|
|
$entry = ltrim($entry);
|
|
return strlen($entry) > 0 && substr($entry, 0, 1) != "#";
|
|
});
|
|
|
|
$proxylist = array_values($proxylist);
|
|
|
|
return $proxylist[$proxy_index_raw % count($proxylist)];
|
|
}
|
|
|
|
// this function is also called directly on nextpage
|
|
public function assign_proxy(&$curlproc, $ip){
|
|
|
|
// parse proxy line
|
|
[
|
|
$type,
|
|
$address,
|
|
$port,
|
|
$username,
|
|
$password
|
|
] = explode(":", $ip, 5);
|
|
|
|
switch($type){
|
|
|
|
case "raw_ip":
|
|
return;
|
|
break;
|
|
|
|
case "http":
|
|
case "https":
|
|
curl_setopt($curlproc, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
|
|
curl_setopt($curlproc, CURLOPT_PROXY, $type . "://" . $address . ":" . $port);
|
|
break;
|
|
|
|
case "socks4":
|
|
curl_setopt($curlproc, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
|
|
curl_setopt($curlproc, CURLOPT_PROXY, $address . ":" . $port);
|
|
break;
|
|
|
|
case "socks5":
|
|
curl_setopt($curlproc, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
|
|
curl_setopt($curlproc, CURLOPT_PROXY, $address . ":" . $port);
|
|
break;
|
|
|
|
case "socks4a":
|
|
curl_setopt($curlproc, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
|
|
curl_setopt($curlproc, CURLOPT_PROXY, $address . ":" . $port);
|
|
break;
|
|
|
|
case "socks5_hostname":
|
|
curl_setopt($curlproc, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
|
|
curl_setopt($curlproc, CURLOPT_PROXY, $address . ":" . $port);
|
|
break;
|
|
}
|
|
|
|
if($username != ""){
|
|
|
|
curl_setopt($curlproc, CURLOPT_PROXYUSERPWD, $username . ":" . $password);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
Next page stuff
|
|
*/
|
|
public function store($payload, $page, $proxy){
|
|
|
|
$key = sodium_crypto_secretbox_keygen();
|
|
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
|
|
|
|
$requestid = apcu_inc("requestid");
|
|
|
|
apcu_store(
|
|
$page[0] . "." . // first letter of page name
|
|
$this->scraper . // scraper name
|
|
$requestid,
|
|
[
|
|
$nonce,
|
|
$proxy,
|
|
// compress and encrypt
|
|
sodium_crypto_secretbox(
|
|
gzdeflate($payload),
|
|
$nonce,
|
|
$key
|
|
)
|
|
],
|
|
900 // cache information for 15 minutes
|
|
);
|
|
|
|
return
|
|
$this->scraper . $requestid . "." .
|
|
rtrim(strtr(base64_encode($key), '+/', '-_'), '=');
|
|
}
|
|
|
|
public function get($npt, $page){
|
|
|
|
$page = $page[0];
|
|
$explode = explode(".", $npt, 2);
|
|
|
|
if(count($explode) !== 2){
|
|
|
|
throw new Exception("Malformed nextPageToken!");
|
|
}
|
|
|
|
$apcu = $page . "." . $explode[0];
|
|
$key = $explode[1];
|
|
|
|
$payload = apcu_fetch($apcu);
|
|
|
|
if($payload === false){
|
|
|
|
throw new Exception("The next page token is invalid or has expired!");
|
|
}
|
|
|
|
$key =
|
|
base64_decode(
|
|
str_pad(
|
|
strtr($key, '-_', '+/'),
|
|
strlen($key) % 4,
|
|
'=',
|
|
STR_PAD_RIGHT
|
|
)
|
|
);
|
|
|
|
// decrypt and decompress data
|
|
$payload[2] =
|
|
gzinflate(
|
|
sodium_crypto_secretbox_open(
|
|
$payload[2], // data
|
|
$payload[0], // nonce
|
|
$key
|
|
)
|
|
);
|
|
|
|
if($payload[2] === false){
|
|
|
|
throw new Exception("The next page token is invalid or has expired!");
|
|
}
|
|
|
|
// remove the key after using successfully
|
|
apcu_delete($apcu);
|
|
|
|
return [
|
|
$payload[2], // data
|
|
$payload[1] // proxy
|
|
];
|
|
}
|
|
}
|