adjust s3 header file.

weed/s3api/http/header.go

@@ -0,0 +1,30 @@
+/*
+ * MinIO Cloud Storage, (C) 2019 MinIO, Inc.
+ *
+ * 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.
+ */
+
+package http
+
+// Standard S3 HTTP request constants
+const (
+	// S3 storage class
+	AmzStorageClass = "x-amz-storage-class"
+
+	// S3 user-defined metadata
+	AmzUserMetaPrefix = "X-Amz-Meta-"
+
+	// S3 object tagging
+	AmzObjectTagging = "X-Amz-Tagging"
+	AmzTagCount      = "x-amz-tagging-count"
+)