增加header key相关常量定义

header.go

@@ -0,0 +1,16 @@
+// Package consts ...
+//
+// Description : consts ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2024-01-04 20:28
+package consts
+
+const (
+	HeaderKeyAccessControlAllowOrigin   = "Access-Control-Allow-Origin"   // 标识允许哪个域的请求
+	HeaderKeyAccessControlAllowHeaders  = "Access-Control-Allow-Headers"  // 标识允许的请求header
+	HeaderKeyAccessControlAllowMethods  = "Access-Control-Allow-Methods"  // 标识允许的请求方法
+	HeaderKeyAccessControlExposeHeaders = "Access-Control-Expose-Headers" // 允许浏览器端能够获取相应的header值
+	HeaderKeyAccessControlMaxAge        = "Access-Control-Max-Age"        // 控制发送预检请求options的频率，单位 : 秒
+)