Restructure minio api, move signature checks from utils to Api.

pkg/api/contenttype.go

@@ -0,0 +1,53 @@
+/*
+ * Mini Object Storage, (C) 2015 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 api
+
+import (
+	"net/http"
+)
+
+type contentType int
+
+const (
+	xmlType contentType = iota
+	jsonType
+)
+
+// content-type to human readable map
+var typeToString = map[contentType]string{
+	xmlType:  "application/xml",
+	jsonType: "application/json",
+}
+
+// human readbale to content-type map
+var acceptToType = map[string]contentType{
+	"application/xml":  xmlType,
+	"application/json": jsonType,
+}
+
+// Get content type requested from 'Accept' header
+func getContentType(req *http.Request) contentType {
+	if accept := req.Header.Get("Accept"); accept != "" {
+		return acceptToType[accept]
+	}
+	return xmlType
+}
+
+// Content type to human readable string
+func getContentString(content contentType) string {
+	return typeToString[content]
+}