使用token防盗链时，添加生成防盗链_upt参数的方法

src/Upyun/Config.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace Upyun;
 
 /**
@@ -72,6 +73,17 @@ class Config
  */
  private $formApiKey;
 
+ /**
+ * @var string token防盗链使用的与CDN平台约定的签名密钥
+ * https://help.upyun.com/knowledge-base/cdn-token-limite
+ */
+ private $uptSecret;
+
+ /**
+ * @var string 防盗链绑定的过期时间
+ */
+ private $uptExpiration = 1800;
+
  /**
  * @var string rest api 和 form api 的接口地址
  */
@@ -159,4 +171,24 @@ public function setConcurrency($concurrency)
  {
  $this->concurrency = $concurrency;
  }
+
+ public function setUptSecret($secret)
+ {
+ $this->uptSecret = $secret;
+ }
+
+ public function getUptSecret()
+ {
+ return $this->uptSecret;
+ }
+
+ public function setUptExpiration($expiration)
+ {
+ $this->uptExpiration = $expiration;
+ }
+
+ public function getUptExpiration()
+ {
+ return $this->uptExpiration;
+ }
 }

src/Upyun/Signature.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace Upyun;
 
 /**
@@ -95,4 +96,37 @@ public static function getBodySignature(Config $serviceConfig, $method, $uri, $d
  $signature = base64_encode(hash_hmac('sha1', implode('&', $data), $serviceConfig->operatorPassword, true));
  return 'UPYUN ' . $serviceConfig->operatorName . ':' . $signature;
  }
+
+ /**
+ * 获取防盗链token，前提是已开启token防盗链
+ * https://help.upyun.com/knowledge-base/cdn-token-limite
+ * 使用防盗链生成token时，需要提前设置secret
+ * Config.php里的setUptSecret()方法
+ * @param Config $serviceConfig
+ * @param $uri 请求路径
+ *
+ * @return string _upt参数的值
+ */
+ public static function getUptToken(Config $serviceConfig, $uri)
+ {
+ $etime = time() + $serviceConfig->getUptExpiration();
+ $sign = md5("{$serviceConfig->getUptSecret()}&{$etime}&{$uri}");
+ $upt = substr($sign, 12, 8) . $etime;
+ return $upt;
+ }
+
+ /**
+ * 根据传入的URL直接处理成携带upt参数的URL
+ * @param Config $serviceConfig
+ * @param $method 请求方法
+ * @param $url 访问URL
+ *
+ * @return string 携带upt参数的URL
+ */
+ public static function getUptUrl(Config $serviceConfig, $url)
+ {
+ $urlObj = parse_url($url);
+ $upt = self::getUptToken($serviceConfig, $urlObj['path']);
+ return $urlObj['scheme'] . $urlObj['host'] . '?_upt=' . $upt;
+ }
 }