src/main/java/com/kamco/cd/kamcoback/label/LabelAllocateApiController.java

@@ -1,7 +1,6 @@
 package com.kamco.cd.kamcoback.label;
 
 import com.kamco.cd.kamcoback.common.download.DownloadExecutor;
-import com.kamco.cd.kamcoback.common.download.dto.DownloadSpec;
 import com.kamco.cd.kamcoback.config.api.ApiResponseDto;
 import com.kamco.cd.kamcoback.label.dto.LabelAllocateDto;
 import com.kamco.cd.kamcoback.label.dto.LabelAllocateDto.InferenceDetail;
@@ -25,6 +24,7 @@ import io.swagger.v3.oas.annotations.responses.ApiResponses;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -32,7 +32,9 @@ import java.util.UUID;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.Resource;
 import org.springframework.data.domain.Page;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -42,7 +44,6 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;
 
 @Slf4j
 @Tag(name = "라벨링 작업 관리", description = "라벨링 작업 배정 및 통계 조회 API")
@@ -381,7 +382,7 @@ public class LabelAllocateApiController {
         @ApiResponse(responseCode = "500", description = "서버 오류", content = @Content)
       })
   @GetMapping("/download/{uuid}")
-  public ResponseEntity<StreamingResponseBody> download(
+  public ResponseEntity<Resource> download(
       @Parameter(example = "6d8d49dc-0c9d-4124-adc7-b9ca610cc394") @PathVariable UUID uuid)
       throws IOException {
 
@@ -391,9 +392,19 @@ public class LabelAllocateApiController {
 
     String uid = labelAllocateService.findLearnUid(uuid);
     Path zipPath = Paths.get(responsePath).resolve(uid + ".zip");
-
-    return downloadExecutor.stream(
-        new DownloadSpec(uuid, zipPath, uid + ".zip", MediaType.APPLICATION_OCTET_STREAM));
+    long size = Files.size(zipPath);
+    Resource resource = new org.springframework.core.io.UrlResource(zipPath.toUri());
+    return ResponseEntity.ok()
+        .header(
+            HttpHeaders.CONTENT_DISPOSITION,
+            "attachment; filename=\"" + zipPath.getFileName().toString() + "\"")
+        .header(HttpHeaders.ACCEPT_RANGES, "bytes")
+        .header("X-Accel-Buffering", "no") // nginx/ingress 버퍼링 방지 힌트
+        .contentType(MediaType.APPLICATION_OCTET_STREAM)
+        .contentLength(size)
+        .body(resource);
+    //    return downloadExecutor.stream(
+    //        new DownloadSpec(uuid, zipPath, uid + ".zip", MediaType.APPLICATION_OCTET_STREAM));
   }
 
   @Operation(summary = "라벨 파일 다운로드 이력 조회", description = "라벨 파일 다운로드 이력 조회")