feat(upload): 添加华为 OBS 对象存储支持

- 在 addons.php 中添加了与华为 OBS 相关的钩子
- 新增了对华为 OBS 上传功能的实现，包括分片上传和合并
- 优化了上传参数处理和错误处理
- 支持客户端和服务端两种上传模式

addons/hwobs/library/Obs/Internal/Common/SchemaFormatter.php

@@ -0,0 +1,116 @@
+<?php
+
+/**
+ * Copyright 2019 Huawei Technologies Co.,Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+ * this file except in compliance with the License.  You may obtain a copy of the
+ * License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+namespace Obs\Internal\Common;
+
+
+class SchemaFormatter
+{
+    protected static $utcTimeZone;
+
+    public static function format($fmt, $value)
+    {   
+        if($fmt === 'date-time'){
+            return self::formatDateTime($value);
+        }
+        
+        if($fmt === 'data-time-http'){
+            return self::formatDateTimeHttp($value);
+        }
+        
+        if($fmt === 'data-time-middle'){
+            return self::formatDateTimeMiddle($value);
+        }
+        
+        if($fmt === 'date'){
+            return self::formatDate($value);
+        }
+        
+        if($fmt === 'timestamp'){
+            return self::formatTimestamp($value);
+        }
+        
+        if($fmt === 'boolean-string'){
+            return self::formatBooleanAsString($value);
+        }
+        
+        return $value;
+    }
+    
+    public static function formatDateTimeMiddle($dateTime)
+    {
+    	if (is_string($dateTime)) {
+    		$dateTime = new \DateTime($dateTime);
+    	}
+    	
+    	if ($dateTime instanceof \DateTime) {
+    		return $dateTime -> format('Y-m-d\T00:00:00\Z');
+    	}
+    	return null;
+    }
+
+    public static function formatDateTime($value)
+    {
+        return self::dateFormatter($value, 'Y-m-d\TH:i:s\Z');
+    }
+
+    public static function formatDateTimeHttp($value)
+    {
+        return self::dateFormatter($value, 'D, d M Y H:i:s \G\M\T');
+    }
+
+    public static function formatDate($value)
+    {
+        return self::dateFormatter($value, 'Y-m-d');
+    }
+
+    public static function formatTime($value)
+    {
+        return self::dateFormatter($value, 'H:i:s');
+    }
+
+    public static function formatBooleanAsString($value)
+    {
+        return filter_var($value, FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false';
+    }
+
+    public static function formatTimestamp($value)
+    {
+        return (int) self::dateFormatter($value, 'U');
+    }
+
+    private static function dateFormatter($dt, $fmt)
+    {
+        if (is_numeric($dt)) {
+            return gmdate($fmt, (int) $dt);
+        }
+
+        if (is_string($dt)) {
+            $dt = new \DateTime($dt);
+        }
+
+        if ($dt instanceof \DateTime) {
+            if (!self::$utcTimeZone) {
+                self::$utcTimeZone = new \DateTimeZone('UTC');
+            }
+            
+            return $dt->setTimezone(self::$utcTimeZone)->format($fmt);
+        }
+
+        return null;
+    }
+}