From bca265aea67ec62499aaa113a6490ce9ec7fe730 Mon Sep 17 00:00:00 2001 From: lolcat Date: Sat, 22 Jul 2023 14:41:14 -0400 Subject: still missing things on google scraper --- lib/curlproxy.php | 652 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 652 insertions(+) create mode 100644 lib/curlproxy.php (limited to 'lib/curlproxy.php') diff --git a/lib/curlproxy.php b/lib/curlproxy.php new file mode 100644 index 0000000..846fbb7 --- /dev/null +++ b/lib/curlproxy.php @@ -0,0 +1,652 @@ +cache = $cache; + } + + public function do404(){ + + http_response_code(404); + header("Content-Type: image/png"); + + $handle = fopen("lib/img404.png", "r"); + echo fread($handle, filesize("lib/img404.png")); + fclose($handle); + + die(); + return; + } + + public function getabsoluteurl($path, $relative){ + + if($this->validateurl($path)){ + + return $path; + } + + if(substr($path, 0, 2) == "//"){ + + return "https:" . $path; + } + + $url = null; + + $relative = parse_url($relative); + $url = $relative["scheme"] . "://"; + + if( + isset($relative["user"]) && + isset($relative["pass"]) + ){ + + $url .= $relative["user"] . ":" . $relative["pass"] . "@"; + } + + $url .= $relative["host"]; + + if(isset($relative["path"])){ + + $relative["path"] = explode( + "/", + $relative["path"] + ); + + unset($relative["path"][count($relative["path"]) - 1]); + $relative["path"] = implode("/", $relative["path"]); + + $url .= $relative["path"]; + } + + if( + strlen($path) !== 0 && + $path[0] !== "/" + ){ + + $url .= "/"; + } + + $url .= $path; + + return $url; + } + + public function validateurl($url){ + + $url_parts = parse_url($url); + + // check if required parts are there + if( + !isset($url_parts["scheme"]) || + !( + $url_parts["scheme"] == "http" || + $url_parts["scheme"] == "https" + ) || + !isset($url_parts["host"]) + ){ + return false; + } + + $ip = + str_replace( + ["[", "]"], // handle ipv6 + "", + $url_parts["host"] + ); + + // if its not an IP + if(!filter_var($ip, FILTER_VALIDATE_IP)){ + + // resolve domain's IP + $ip = gethostbyname($url_parts["host"] . "."); + } + + // check if its localhost + if( + filter_var( + $ip, + FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE + ) === false + ){ + + return false; + } + + return true; + } + + public function get($url, $reqtype = self::req_web, $acceptallcodes = false, $referer = null, $redirectcount = 0){ + + if($redirectcount === 5){ + + throw new Exception("Too many redirects"); + } + + // sanitize URL + try{ + + $this->validateurl($url); + }catch(Exception $error){ + + throw new Exception($error->getMessage()); + } + + $this->clientcache(); + + $curl = curl_init(); + + curl_setopt($curl, CURLOPT_URL, $url); + curl_setopt($curl, CURLOPT_ENCODING, ""); // default encoding + curl_setopt($curl, CURLOPT_HEADER, 1); + + switch($reqtype){ + case self::req_web: + curl_setopt( + $curl, + CURLOPT_HTTPHEADER, + [ + "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:107.0) Gecko/20100101 Firefox/110.0", + "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8", + "Accept-Language: en-US,en;q=0.5", + "Accept-Encoding: gzip, deflate", + "DNT: 1", + "Connection: keep-alive", + "Upgrade-Insecure-Requests: 1", + "Sec-Fetch-Dest: document", + "Sec-Fetch-Mode: navigate", + "Sec-Fetch-Site: none", + "Sec-Fetch-User: ?1" + ] + ); + break; + + case self::req_image: + + if($referer === null){ + $referer = explode("/", $url, 4); + array_pop($referer); + + $referer = implode("/", $referer); + } + + curl_setopt( + $curl, + CURLOPT_HTTPHEADER, + [ + "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:107.0) Gecko/20100101 Firefox/107.0", + "Accept: image/avif,image/webp,*/*", + "Accept-Language: en-US,en;q=0.5", + "Accept-Encoding: gzip, deflate", + "DNT: 1", + "Connection: keep-alive", + "Referer: {$referer}" + ] + ); + break; + } + + curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); + curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); + curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true); + curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 30); + curl_setopt($curl, CURLOPT_TIMEOUT, 30); + + // limit size of payloads + curl_setopt($curl, CURLOPT_BUFFERSIZE, 1024); + curl_setopt($curl, CURLOPT_NOPROGRESS, false); + curl_setopt( + $curl, + CURLOPT_PROGRESSFUNCTION, + function($downloadsize, $downloaded, $uploadsize, $uploaded + ){ + + // if $downloaded exceeds 100MB, fuck off + return ($downloaded > 100000000) ? 1 : 0; + }); + + $body = curl_exec($curl); + + if(curl_errno($curl)){ + + throw new Exception(curl_error($curl)); + } + + curl_close($curl); + + $headers = []; + $http = null; + + while(true){ + + $header = explode("\n", $body, 2); + $body = $header[1]; + + if($http === null){ + + // http/1.1 200 ok + $header = explode("/", $header[0], 2); + $header = explode(" ", $header[1], 3); + + $http = [ + "version" => (float)$header[0], + "code" => (int)$header[1] + ]; + + continue; + } + + if(trim($header[0]) == ""){ + + // reached end of headers + break; + } + + $header = explode(":", $header[0], 2); + + // malformed headers + if(count($header) !== 2){ continue; } + + $headers[strtolower(trim($header[0]))] = trim($header[1]); + } + + // check http code + if( + $http["code"] >= 300 && + $http["code"] <= 309 + ){ + + // redirect + if(!isset($headers["location"])){ + + throw new Exception("Broken redirect"); + } + + $redirectcount++; + + return $this->get($this->getabsoluteurl($headers["location"], $url), $reqtype, $acceptallcodes, $referer, $redirectcount); + }else{ + if( + $acceptallcodes === false && + $http["code"] > 300 + ){ + + throw new Exception("Remote server returned an error code! ({$http["code"]})"); + } + } + + // check if data is okay + switch($reqtype){ + + case self::req_image: + + $format = false; + + if(isset($headers["content-type"])){ + + if($headers["content-type"] == "text/html"){ + + throw new Exception("Server returned an html document instead of image"); + } + + $tmp = explode(";", $headers["content-type"]); + + for($i=0; $i $http, + "format" => $format, + "headers" => $headers, + "body" => $body + ]; + break; + + default: + + return [ + "http" => $http, + "headers" => $headers, + "body" => $body + ]; + break; + } + + return; + } + + public function stream_linear_image($url, $referer = null){ + + $this->stream($url, $referer, "image"); + } + + public function stream_linear_audio($url, $referer = null){ + + $this->stream($url, $referer, "audio"); + } + + private function stream($url, $referer, $format){ + + $this->url = $url; + $this->format = $format; + + // sanitize URL + try{ + + $this->validateurl($url); + }catch(Exception $error){ + + throw new Exception($error->getMessage()); + } + + $this->clientcache(); + + $curl = curl_init(); + + // set headers + if($referer === null){ + $referer = explode("/", $url, 4); + array_pop($referer); + + $referer = implode("/", $referer); + } + + switch($format){ + + case "image": + curl_setopt( + $curl, + CURLOPT_HTTPHEADER, + [ + "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:107.0) Gecko/20100101 Firefox/110.0", + "Accept: image/avif,image/webp,*/*", + "Accept-Language: en-US,en;q=0.5", + "Accept-Encoding: gzip, deflate, br", + "DNT: 1", + "Connection: keep-alive", + "Referer: {$referer}" + ] + ); + break; + + case "audio": + curl_setopt( + $curl, + CURLOPT_HTTPHEADER, + [ + "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:107.0) Gecko/20100101 Firefox/110.0", + "Accept: audio/webm,audio/ogg,audio/wav,audio/*;q=0.9,application/ogg;q=0.7,video/*;q=0.6,*/*;q=0.5", + "Accept-Language: en-US,en;q=0.5", + "Accept-Encoding: gzip, deflate, br", + "DNT: 1", + "Connection: keep-alive", + "Referer: {$referer}" + ] + ); + break; + } + + // follow redirects + curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); + curl_setopt($curl, CURLOPT_MAXREDIRS, 5); + curl_setopt($curl, CURLOPT_AUTOREFERER, 5); + + // set url + curl_setopt($curl, CURLOPT_URL, $url); + curl_setopt($curl, CURLOPT_ENCODING, ""); // default encoding + + // timeout + disable ssl + curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); + curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true); + curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10); + curl_setopt($curl, CURLOPT_TIMEOUT, 30); + + curl_setopt( + $curl, + CURLOPT_WRITEFUNCTION, + function($c, $data){ + + if(curl_getinfo($c, CURLINFO_HTTP_CODE) !== 200){ + + throw new Exception("Serber returned a non-200 code"); + } + + echo $data; + return strlen($data); + } + ); + + $this->empty_header = false; + $this->cont = false; + $this->headers_tmp = []; + $this->headers = []; + curl_setopt( + $curl, + CURLOPT_HEADERFUNCTION, + function($c, $header){ + + $head = trim($header); + $len = strlen($head); + + if($len === 0){ + + $this->empty_header = true; + $this->headers_tmp = []; + }else{ + + $this->empty_header = false; + $this->headers_tmp[] = $head; + } + + foreach($this->headers_tmp as $h){ + + // parse headers + $h = explode(":", $h, 2); + + if(count($h) !== 2){ + + if(curl_getinfo($c, CURLINFO_HTTP_CODE) !== 200){ + + // not HTTP 200, probably a redirect + $this->cont = false; + }else{ + + $this->cont = true; + } + + // is HTTP 200, just ignore that line + continue; + } + + $this->headers[strtolower(trim($h[0]))] = trim($h[1]); + } + + if( + $this->cont && + $this->empty_header + ){ + + // get content type + if(isset($this->headers["content-type"])){ + + $filetype = explode("/", $this->headers["content-type"]); + + if(strtolower($filetype[0]) != $this->format){ + + throw new Exception("Resource is not an {$this->format} (Found {$filetype[0]} instead)"); + } + + }else{ + + throw new Exception("Resource is not an {$this->format} (no Content-Type)"); + } + + header("Content-Type: {$this->format}/{$filetype[1]}"); + + // give payload size + if(isset($this->headers["content-length"])){ + + header("Content-Length: {$this->headers["content-length"]}"); + } + + // give filename + $this->getfilenameheader($this->headers, $this->url, $filetype[1]); + } + + return strlen($header); + } + ); + + curl_exec($curl); + + if(curl_errno($curl)){ + + throw new Exception(curl_error($curl)); + } + + curl_close($curl); + } + + public function getfilenameheader($headers, $url, $filetype = "jpg"){ + + // get filename from content-disposition header + if(isset($headers["content-disposition"])){ + + preg_match( + '/filename=([^;]+)/', + $headers["content-disposition"], + $filename + ); + + if(isset($filename[1])){ + + header("Content-Disposition: filename=" . $filename[1] . "." . $filetype); + return; + } + } + + // get filename from URL + $filename = parse_url($url, PHP_URL_PATH); + + if($filename === null){ + + // everything failed! rename file to domain name + header("Content-Disposition: filename=" . parse_url($url, PHP_URL_HOST) . "." . $filetype); + return; + } + + // remove extension from filename + $filename = + explode( + ".", + basename($filename) + ); + + if(count($filename) > 1){ + array_pop($filename); + } + + $filename = implode(".", $filename); + + header("Content-Disposition: inline; filename=" . $filename . "." . $filetype); + return; + } + + public function getimageformat($payload, &$imagick){ + + $finfo = new finfo(FILEINFO_MIME_TYPE); + $format = $finfo->buffer($payload["body"]); + + if($format === false){ + + if($payload["format"] === false){ + + header("X-Error: Could not parse format"); + $this->favicon404(); + } + + $format = $payload["format"]; + }else{ + + $format_tmp = explode("/", $format, 2); + + if($format_tmp[0] == "image"){ + + $format_tmp = strtolower($format_tmp[1]); + + if(substr($format_tmp, 0, 2) == "x-"){ + + $format_tmp = substr($format_tmp, 2); + } + + $format = $format_tmp; + } + } + + switch($format){ + + case "tiff": $format = "gif"; break; + case "vnd.microsoft.icon": $format = "ico"; break; + case "icon": $format = "ico"; break; + case "svg+xml": $format = "svg"; break; + } + + $imagick = new Imagick(); + + if( + !in_array( + $format, + array_map("strtolower", $imagick->queryFormats()) + ) + ){ + + // format could not be found, but imagemagick can + // sometimes detect it? shit's fucked + $format = false; + } + + return $format; + } + + public function clientcache(){ + + if($this->cache === false){ + + return; + } + + header("Last-Modified: Thu, 01 Oct 1970 00:00:00 GMT"); + $headers = getallheaders(); + + if( + isset($headers["If-Modified-Since"]) || + isset($headers["If-Unmodified-Since"]) + ){ + + http_response_code(304); // 304: Not Modified + die(); + } + } +} -- cgit v1.2.3