新增 saveas demo

Author: ankadada

examples/saveas.php

@@ -0,0 +1,28 @@
+<?php
+    require_once __DIR__ . '/../autoload.php';
+    
+    use Qiniu\Auth;
+    use Qiniu\Processing\PersistentFop;
+
+    // 后台来获取AK, SK
+    $accessKey = 'Access_Key';
+    $secretKey = 'Secret_Key';
+
+    //生成EncodedEntryURI的值
+    $entry='<bucket>:<Key>';//<Key>为生成缩略图的文件名
+    //生成的值
+    $encodedEntryURI=\Qiniu\base64_urlSafeEncode($entry);
+
+    //使用SecretKey对新的下载URL进行HMAC1-SHA1签名
+    $newurl = "78re52.com1.z0.glb.clouddn.com/resource/Ship.jpg?imageView2/2/w/200/h/200|saveas/".$encodedEntryURI;
+
+    $sign = hash_hmac("sha1", $newurl,$secretKey, true);
+
+    //对签名进行URL安全的Base64编码
+    $encodedSign = \Qiniu\base64_urlSafeEncode($sign);
+    //最终得到的完整下载URL
+    $finalURL = "http://".$newurl."/sign/".$accessKey.":".$encodedSign;
+
+    return $finalURL;
+
+?>