library/Geetestlib.class.php
<?php
/**
* 极验行为式验证安全平台，php 网站主后台包含的库文件
*
* @author Tanxu
*/
class GeetestLib {
const GT_SDK_VERSION = 'php_3.0.0';
public static $connectTimeout = 1;
public static $socketTimeout = 1;
private $response;
public function __construct($captcha_id, $private_key) {
$this->captcha_id = $captcha_id;
$this->private_key = $private_key;
}
/**
* 判断极验服务器是否down机
*
* @param array $data
* @return int
*/
public function pre_process($param, $new_captcha=1) {
$data = array('gt'=>$this->captcha_id,
'new_captcha'=>$new_captcha
);
$data = array_merge($data,$param);
$query = http_build_query($data);
$url = "http://api.geetest.com/register.php?" . $query;
$challenge = $this->send_request($url);
if (strlen($challenge) != 32) {
$this->failback_process();
return 0;
}
$this->success_process($challenge);
return 1;
}
/**
* @param $challenge
*/
private function success_process($challenge) {
$challenge = md5($challenge . $this->private_key);
$result = array(
'success' => 1,
'gt' => $this->captcha_id,
'challenge' => $challenge,
'new_captcha'=>1
);
$this->response = $result;
}
/**
*
*/
private function failback_process() {
$rnd1 = md5(rand(0, 100));
$rnd2 = md5(rand(0, 100));
$challenge = $rnd1 . substr($rnd2, 0, 2);
$result = array(
'success' => 0,
'gt' => $this->captcha_id,
'challenge' => $challenge,
'new_captcha'=>1
);
$this->response = $result;
}
/**
* @return mixed
*/
public function get_response_str() {
return json_encode($this->response);
}
/**
* 返回数组方便扩展
*
* @return mixed
*/
public function get_response() {
return $this->response;
}
/**
* 正常模式获取验证结果
*
* @param string $challenge
* @param string $validate
* @param string $seccode
* @param array $param
* @return int
*/
public function success_validate($challenge, $validate, $seccode,$param, $json_format=1) {
if (!$this->check_validate($challenge, $validate)) {
return 0;
}
$query = array(
"seccode" => $seccode,
"timestamp"=>time(),
"challenge"=>$challenge,
"captchaid"=>$this->captcha_id,
"json_format"=>$json_format,
"sdk" => self::GT_SDK_VERSION
);
$query = array_merge($query,$param);
$url = "http://api.geetest.com/validate.php";
$codevalidate = $this->post_request($url, $query);
$obj = json_decode($codevalidate,true);
if ($obj === false){
return 0;
}
if ($obj['seccode'] == md5($seccode)) {
return 1;
} else {
return 0;
}
}
/**
* 宕机模式获取验证结果
*
* @param $challenge
* @param $validate
* @param $seccode
* @return int
*/
public function fail_validate($challenge, $validate, $seccode) {
if(md5($challenge) == $validate){
return 1;
}else{
return 0;
}
}
/**
* @param $challenge
* @param $validate
* @return bool
*/
private function check_validate($challenge, $validate) {
if (strlen($validate) != 32) {
return false;
}
if (md5($this->private_key . 'geetest' . $challenge) != $validate) {
return false;
}
return true;
}
/**
* GET 请求
*
* @param $url
* @return mixed|string
*/
private function send_request($url) {
if (function_exists('curl_exec')) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, self::$connectTimeout);
curl_setopt($ch, CURLOPT_TIMEOUT, self::$socketTimeout);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($ch);
$curl_errno = curl_errno($ch);
curl_close($ch);
if ($curl_errno >0) {
return 0;
}else{
return $data;
}
} else {
$opts = array(
'http' => array(
'method' => "GET",
'timeout' => self::$connectTimeout + self::$socketTimeout,
)
);
$context = stream_context_create($opts);
$data = @file_get_contents($url, false, $context);
if($data){
return $data;
}else{
return 0;
}
}
}
/**
*
* @param $url
* @param array $postdata
* @return mixed|string
*/
private function post_request($url, $postdata = '') {
if (!$postdata) {
return false;
}
$data = http_build_query($postdata);
if (function_exists('curl_exec')) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, self::$connectTimeout);
curl_setopt($ch, CURLOPT_TIMEOUT, self::$socketTimeout);
//不可能执行到的代码
if (!$postdata) {
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
} else {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
}
$data = curl_exec($ch);
if (curl_errno($ch)) {
$err = sprintf("curl[%s] error[%s]", $url, curl_errno($ch) . ':' . curl_error($ch));
$this->triggerError($err);
}
curl_close($ch);
} else {
if ($postdata) {
$opts = array(
'http' => array(
'method' => 'POST',
'header' => "Content-type: application/x-www-form-urlencoded\r\n" . "Content-Length: " . strlen($data) . "\r\n",
'content' => $data,
'timeout' => self::$connectTimeout + self::$socketTimeout
)
);
$context = stream_context_create($opts);
$data = file_get_contents($url, false, $context);
}
}
return $data;
}
/**
* @param $err
*/
private function triggerError($err) {
trigger_error($err);
}
}