added greppr support also btw im not dead

1 files changed, 429 insertions, 0 deletions

diff --git a/scraper/greppr.php b/scraper/greppr.php
new file mode 100644
index 0000000..402c3d2
--- /dev/null
+++ b/scraper/greppr.php
@@ -0,0 +1,429 @@
+<?php
+
+class greppr{
+	
+	public function __construct(){
+		
+		include "lib/backend.php";
+		$this->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");
+			}
+			
+			$this->get($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 =
+				$this->fuckhtml
+				->getElementsByFuzzyAttributeValue(
+					"style",
+					"color:#777777;",
+					"p"
+				);
+			
+			if(count($description) === 0){
+				
+				$description = null;
+			}else{
+				
+				$description =
+					$this->fuckhtml
+					->getTextContent(
+						$description[0]
+					);
+			}
+			
+			$date =
+				$this->fuckhtml
+				->getElementsByTagName(
+					"p"
+				);
+			
+			$date =
+				strtotime(
+					explode(
+						"Added:",
+						$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;
+	}
+}