대용량 다운로드 테스트

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

@@ -1,5 +1,7 @@
 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;
@@ -23,17 +25,15 @@ 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;
 import java.util.UUID;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.coyote.BadRequestException;
 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;
@@ -43,6 +43,7 @@ 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")
@@ -52,6 +53,7 @@ import org.springframework.web.bind.annotation.RestController;
 public class LabelAllocateApiController {
 
   private final LabelAllocateService labelAllocateService;
+  private final DownloadExecutor downloadExecutor;
 
   @Value("${file.dataset-response}")
   private String responsePath;
@@ -380,25 +382,19 @@ public class LabelAllocateApiController {
         @ApiResponse(responseCode = "500", description = "서버 오류", content = @Content)
       })
   @GetMapping("/download/{uuid}")
-  public ResponseEntity<Resource> download(
+  public ResponseEntity<StreamingResponseBody> download(
       @Parameter(example = "6d8d49dc-0c9d-4124-adc7-b9ca610cc394") @PathVariable UUID uuid)
       throws IOException {
-    //
-    //    if (!labelAllocateService.isDownloadable(uuid)) {
-    //      throw new BadRequestException();
-    //    }
+
+    if (!labelAllocateService.isDownloadable(uuid)) {
+      throw new BadRequestException();
+    }
+
     String uid = labelAllocateService.findLearnUid(uuid);
     Path zipPath = Paths.get(responsePath).resolve(uid + ".zip");
-    long size = Files.size(zipPath);
-    Resource resource = new org.springframework.core.io.UrlResource(zipPath.toUri());
 
-    return ResponseEntity.ok()
-        .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + uid + ".zip" + "\"")
-        .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")