add new authorization token of algorithm Qiniu to support new functions

Author: jemygraw

src/Qiniu/Auth.php

@@ -77,7 +77,8 @@ public function uploadToken(
         $expires = 3600,
         $policy = null,
         $strictPolicy = true
-    ) {
+    )
+    {
         $deadline = time() + $expires;
         $scope = $bucket;
         if ($key !== null) {
@@ -142,4 +143,51 @@ public function authorization($url, $body = null, $contentType = null)
         $authorization = 'QBox ' . $this->signRequest($url, $body, $contentType);
         return array('Authorization' => $authorization);
     }
+
+    public function authorizationV2($url, $method, $body = null, $contentType = null)
+    {
+        $urlItems = parse_url($url);
+        $host = $urlItems['host'];
+
+        if (isset($urlItems['port'])) {
+            $port = $urlItems['port'];
+        } else {
+            $port = '';
+        }
+
+        $path = $urlItems['path'];
+        if (isset($urlItems['query'])) {
+            $query = $urlItems['query'];
+        } else {
+            $query = '';
+        }
+
+        //write request uri
+        $toSignStr = $method . ' ' . $path;
+        if (!empty($query)) {
+            $toSignStr .= '?' . $query;
+        }
+
+        //write host and port
+        $toSignStr .= "\nHost: " . $host;
+        if (!empty($port)) {
+            $toSignStr .= ":" . $port;
+        }
+
+        //write content type
+        if (!empty($contentType)) {
+            $toSignStr .= "\nContent-Type: " . $contentType;
+        }
+
+        $toSignStr .= "\n\n";
+
+        //write body
+        if (!empty($body)) {
+            $toSignStr .= $body;
+        }
+
+        $sign = $this->sign($toSignStr);
+        $auth = 'Qiniu ' . $sign;
+        return array('Authorization' => $auth);
+    }
 }