feat: 일반 유저용 캔 리스트 조회 API 추가, GeoCountryFilter(GeoCountry.OTHER, GeoCountry.KR 구분용) 추가

src/main/kotlin/kr/co/vividnext/sodalive/common/GeoCountry.kt

@@ -0,0 +1,8 @@
+package kr.co.vividnext.sodalive.common
+
+const val WAF_GEO_HEADER = "x-amzn-waf-geo-country"
+
+enum class GeoCountry { KR, OTHER }
+
+fun parseGeo(headerValue: String?): GeoCountry =
+    if (headerValue?.trim()?.uppercase() == "KR") GeoCountry.KR else GeoCountry.OTHER

src/main/kotlin/kr/co/vividnext/sodalive/common/GeoCountryFilter.kt

@@ -0,0 +1,20 @@
+package kr.co.vividnext.sodalive.common
+
+import org.springframework.stereotype.Component
+import org.springframework.web.filter.OncePerRequestFilter
+import javax.servlet.FilterChain
+import javax.servlet.http.HttpServletRequest
+import javax.servlet.http.HttpServletResponse
+
+@Component
+class GeoCountryFilter : OncePerRequestFilter() {
+    override fun doFilterInternal(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        filterChain: FilterChain
+    ) {
+        val country = parseGeo(request.getHeader(WAF_GEO_HEADER))
+        request.setAttribute("geoCountry", country)
+        filterChain.doFilter(request, response)
+    }
+}