header 가져오는 util 커밋

src/main/java/com/kamco/cd/kamcoback/common/utils/HeaderUtil.java

@@ -0,0 +1,23 @@
+package com.kamco.cd.kamcoback.common.utils;
+
+import jakarta.servlet.http.HttpServletRequest;
+
+public final class HeaderUtil {
+
+  private HeaderUtil() {}
+
+  /** 특정 Header 값 조회 */
+  public static String get(HttpServletRequest request, String headerName) {
+    if (request == null || headerName == null) {
+      return null;
+    }
+
+    String value = request.getHeader(headerName);
+    return (value != null && !value.isBlank()) ? value : null;
+  }
+
+  /** 필수 Header 조회 (없으면 null) */
+  public static String getRequired(HttpServletRequest request, String headerName) {
+    return get(request, headerName);
+  }
+}