backend = new backend("greppr"); include "lib/fuckhtml.php"; $this->fuckhtml = new fuckhtml(); } public function getfilters($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 fuckhtml 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->fuckhtml ->getElementsByClassName( "result", "div" ); // check for next page $next_elem = $this->fuckhtml ->getElementsByClassName( "pagination", "ul" ); if(count($next_elem) !== 0){ $this->fuckhtml->load($next_elem[0]); $as = $this->fuckhtml ->getElementsByClassName( "page-link", "a" ); $break = false; foreach($as as $a){ if($break === true){ parse_str( $this->fuckhtml ->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){ $this->fuckhtml->load($result); $a = $this->fuckhtml ->getElementsByTagName( "a" )[0]; $description = $this->fuckhtml ->getElementsByClassName( "highlightedDesc", "p" ); if(count($description) === 0){ $description = null; }else{ $description = $this->limitstrlen( $this->fuckhtml ->getTextContent( $description[0] ) ); } $date = $this->fuckhtml ->getElementsByTagName( "p" ); $date = strtotime( explode( ":", $this->fuckhtml ->getTextContent( $date[count($date) - 1]["innerHTML"] ) )[1] ); $out["web"][] = [ "title" => $this->fuckhtml ->getTextContent( $a["innerHTML"] ), "description" => $description, "url" => $this->fuckhtml ->getTextContent( $a["attributes"]["href"] ), "date" => $date, "type" => "web", "thumb" => [ "url" => null, "ratio" => null ], "sublink" => [], "table" => [] ]; } return $out; } private function parse_token($response, $cookie = false){ $this->fuckhtml->load($response["data"]); $scripts = $this->fuckhtml ->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 $tokens; } private function limitstrlen($text){ return explode("\n", wordwrap($text, 300, "\n"))[0]; } }