forked from Korbs/4get
429 lines
7.8 KiB
PHP
429 lines
7.8 KiB
PHP
<?php
|
|
|
|
class greppr{
|
|
|
|
public function __construct(){
|
|
|
|
include "lib/backend.php";
|
|
$this->backend = new backend("greppr");
|
|
|
|
include "lib/heckhtml.php";
|
|
$this->heckhtml = new heckhtml();
|
|
}
|
|
|
|
public function getfilters($page){
|
|
|
|
return [];
|
|
}
|
|
|
|
private function get($proxy, $url, $get = [], $cookie = false){
|
|
|
|
$curlproc = curl_init();
|
|
|
|
if($get !== []){
|
|
$get = http_build_query($get);
|
|
$url .= "?" . $get;
|
|
}
|
|
|
|
curl_setopt($curlproc, CURLOPT_URL, $url);
|
|
|
|
curl_setopt($curlproc, CURLOPT_ENCODING, ""); // default encoding
|
|
|
|
if($cookie === false){
|
|
|
|
curl_setopt($curlproc, CURLOPT_HTTPHEADER,
|
|
["User-Agent: " . config::USER_AGENT,
|
|
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
|
|
"Accept-Language: en-US,en;q=0.5",
|
|
"Accept-Encoding: gzip",
|
|
"DNT: 1",
|
|
"Connection: keep-alive",
|
|
"Upgrade-Insecure-Requests: 1",
|
|
"Sec-Fetch-Dest: document",
|
|
"Sec-Fetch-Mode: navigate",
|
|
"Sec-Fetch-Site: none",
|
|
"Sec-Fetch-User: ?1"]
|
|
);
|
|
}else{
|
|
|
|
curl_setopt($curlproc, CURLOPT_HTTPHEADER,
|
|
["User-Agent: " . config::USER_AGENT,
|
|
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
|
|
"Accept-Language: en-US,en;q=0.5",
|
|
"Accept-Encoding: gzip",
|
|
"Cookie: PHPSESSID=" . $cookie,
|
|
"DNT: 1",
|
|
"Connection: keep-alive",
|
|
"Upgrade-Insecure-Requests: 1",
|
|
"Sec-Fetch-Dest: document",
|
|
"Sec-Fetch-Mode: navigate",
|
|
"Sec-Fetch-Site: none",
|
|
"Sec-Fetch-User: ?1"]
|
|
);
|
|
}
|
|
|
|
curl_setopt($curlproc, CURLOPT_RETURNTRANSFER, true);
|
|
curl_setopt($curlproc, CURLOPT_SSL_VERIFYHOST, 2);
|
|
curl_setopt($curlproc, CURLOPT_SSL_VERIFYPEER, true);
|
|
curl_setopt($curlproc, CURLOPT_CONNECTTIMEOUT, 30);
|
|
curl_setopt($curlproc, CURLOPT_TIMEOUT, 30);
|
|
|
|
$this->backend->assign_proxy($curlproc, $proxy);
|
|
|
|
$headers = [];
|
|
|
|
curl_setopt(
|
|
$curlproc,
|
|
CURLOPT_HEADERFUNCTION,
|
|
function($curlproc, $header) use (&$headers){
|
|
|
|
$len = strlen($header);
|
|
$header = explode(':', $header, 2);
|
|
|
|
if(count($header) < 2){
|
|
|
|
// ignore invalid headers
|
|
return $len;
|
|
}
|
|
|
|
$headers[strtolower(trim($header[0]))] = trim($header[1]);
|
|
|
|
return $len;
|
|
}
|
|
);
|
|
|
|
$data = curl_exec($curlproc);
|
|
|
|
if(curl_errno($curlproc)){
|
|
|
|
throw new Exception(curl_error($curlproc));
|
|
}
|
|
|
|
curl_close($curlproc);
|
|
|
|
return [
|
|
"headers" => $headers,
|
|
"data" => $data
|
|
];
|
|
}
|
|
|
|
public function web($get, $first_attempt = true){
|
|
|
|
if($get["npt"]){
|
|
|
|
[$q, $proxy] = $this->backend->get($get["npt"], "web");
|
|
|
|
$q = json_decode($q, true);
|
|
|
|
}else{
|
|
|
|
$search = $get["s"];
|
|
if(strlen($search) === 0){
|
|
|
|
throw new Exception("Search term is empty!");
|
|
}
|
|
|
|
$proxy = $this->backend->get_ip();
|
|
}
|
|
|
|
// get token
|
|
// token[0] = static token that changes once a day
|
|
// token[1] = dynamic token that changes on every request
|
|
// token[1] = PHPSESSID cookie
|
|
$tokens = apcu_fetch("greppr_token");
|
|
|
|
if(
|
|
$tokens === false ||
|
|
$first_attempt === false // force token fetch
|
|
){
|
|
|
|
// we haven't gotten the token yet, get it
|
|
try{
|
|
|
|
$response =
|
|
$this->get(
|
|
$proxy,
|
|
"https://greppr.org",
|
|
[]
|
|
);
|
|
}catch(Exception $error){
|
|
|
|
throw new Exception("Failed to fetch search tokens");
|
|
}
|
|
|
|
$tokens = $this->parse_token($response);
|
|
|
|
if($tokens === false){
|
|
|
|
throw new Exception("Failed to grep search tokens");
|
|
}
|
|
}
|
|
|
|
try{
|
|
|
|
if($get["npt"]){
|
|
|
|
$params = [
|
|
$tokens[0] => $q["q"],
|
|
"s" => $q["s"],
|
|
"l" => 30,
|
|
"n" => $tokens[1]
|
|
];
|
|
}else{
|
|
|
|
$params = [
|
|
$tokens[0] => $search,
|
|
"n" => $tokens[1]
|
|
];
|
|
}
|
|
|
|
$searchresults = $this->get(
|
|
$proxy,
|
|
"https://greppr.org/search",
|
|
$params,
|
|
$tokens[2]
|
|
);
|
|
}catch(Exception $error){
|
|
|
|
throw new Exception("Failed to fetch search page");
|
|
}
|
|
|
|
if(strlen($searchresults["data"]) === 0){
|
|
|
|
// redirected to main page, which means we got old token
|
|
// generate a new one
|
|
|
|
// ... unless we just tried to do that
|
|
if($first_attempt === false){
|
|
|
|
throw new Exception("Failed to get a new search token");
|
|
}
|
|
|
|
return $this->web($get, false);
|
|
}
|
|
|
|
// refresh the token with new data (this also triggers heckhtml load)
|
|
$this->parse_token($searchresults, $tokens[2]);
|
|
|
|
// response object
|
|
$out = [
|
|
"status" => "ok",
|
|
"spelling" => [
|
|
"type" => "no_correction",
|
|
"using" => null,
|
|
"correction" => null
|
|
],
|
|
"npt" => null,
|
|
"answer" => [],
|
|
"web" => [],
|
|
"image" => [],
|
|
"video" => [],
|
|
"news" => [],
|
|
"related" => []
|
|
];
|
|
|
|
// get results for later
|
|
$results =
|
|
$this->heckhtml
|
|
->getElementsByClassName(
|
|
"result",
|
|
"div"
|
|
);
|
|
|
|
// check for next page
|
|
$next_elem =
|
|
$this->heckhtml
|
|
->getElementsByClassName(
|
|
"pagination",
|
|
"ul"
|
|
);
|
|
|
|
if(count($next_elem) !== 0){
|
|
|
|
$this->heckhtml->load($next_elem[0]);
|
|
|
|
$as =
|
|
$this->heckhtml
|
|
->getElementsByClassName(
|
|
"page-link",
|
|
"a"
|
|
);
|
|
|
|
$break = false;
|
|
foreach($as as $a){
|
|
|
|
if($break === true){
|
|
|
|
parse_str(
|
|
$this->heckhtml
|
|
->getTextContent(
|
|
$a["attributes"]["href"]
|
|
),
|
|
$values
|
|
);
|
|
|
|
$values = array_values($values);
|
|
|
|
$out["npt"] =
|
|
$this->backend->store(
|
|
json_encode(
|
|
[
|
|
"q" => $values[0],
|
|
"s" => $values[1]
|
|
]
|
|
),
|
|
"web",
|
|
$proxy
|
|
);
|
|
break;
|
|
}
|
|
|
|
if($a["attributes"]["href"] == "#"){
|
|
|
|
$break = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// scrape results
|
|
foreach($results as $result){
|
|
|
|
$this->heckhtml->load($result);
|
|
|
|
$a =
|
|
$this->heckhtml
|
|
->getElementsByTagName(
|
|
"a"
|
|
)[0];
|
|
|
|
$description =
|
|
$this->heckhtml
|
|
->getElementsByFuzzyAttributeValue(
|
|
"style",
|
|
"color:#777777;",
|
|
"p"
|
|
);
|
|
|
|
if(count($description) === 0){
|
|
|
|
$description = null;
|
|
}else{
|
|
|
|
$description =
|
|
$this->heckhtml
|
|
->getTextContent(
|
|
$description[0]
|
|
);
|
|
}
|
|
|
|
$date =
|
|
$this->heckhtml
|
|
->getElementsByTagName(
|
|
"p"
|
|
);
|
|
|
|
$date =
|
|
strtotime(
|
|
explode(
|
|
"Added:",
|
|
$this->heckhtml
|
|
->getTextContent(
|
|
$date[count($date) - 1]["innerHTML"]
|
|
)
|
|
)[1]
|
|
);
|
|
|
|
$out["web"][] = [
|
|
"title" =>
|
|
$this->heckhtml
|
|
->getTextContent(
|
|
$a["innerHTML"]
|
|
),
|
|
"description" => $description,
|
|
"url" =>
|
|
$this->heckhtml
|
|
->getTextContent(
|
|
$a["attributes"]["href"]
|
|
),
|
|
"date" => $date,
|
|
"type" => "web",
|
|
"thumb" => [
|
|
"url" => null,
|
|
"ratio" => null
|
|
],
|
|
"sublink" => [],
|
|
"table" => []
|
|
];
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
private function parse_token($response, $cookie = false){
|
|
|
|
$this->heckhtml->load($response["data"]);
|
|
|
|
$scripts =
|
|
$this->heckhtml
|
|
->getElementsByTagName("script");
|
|
|
|
$found = false;
|
|
foreach($scripts as $script){
|
|
|
|
preg_match(
|
|
'/window\.location ?= ?\'\/search\?([^=]+).*&n=([0-9]+)/',
|
|
$script["innerHTML"],
|
|
$tokens
|
|
);
|
|
|
|
if(isset($tokens[1])){
|
|
|
|
$found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if($found === false){
|
|
|
|
return false;
|
|
}
|
|
|
|
$tokens = [
|
|
$tokens[1],
|
|
$tokens[2]
|
|
];
|
|
|
|
if($cookie !== false){
|
|
|
|
// we already specified a cookie, so use the one we have already
|
|
$tokens[] = $cookie;
|
|
apcu_store("greppr_token", $tokens);
|
|
|
|
return $tokens;
|
|
}
|
|
|
|
if(!isset($response["headers"]["set-cookie"])){
|
|
|
|
// server didn't send a cookie
|
|
return false;
|
|
}
|
|
|
|
// get cookie
|
|
preg_match(
|
|
'/PHPSESSID=([^;]+)/',
|
|
$response["headers"]["set-cookie"],
|
|
$cookie
|
|
);
|
|
|
|
if(!isset($cookie[1])){
|
|
|
|
// server sent an unexpected cookie
|
|
return false;
|
|
}
|
|
|
|
$tokens[] = $cookie[1];
|
|
apcu_store("greppr_token", $tokens);
|
|
|
|
return $tokens;
|
|
}
|
|
}
|