대용량 다운로드 수정

src/main/java/com/kamco/cd/kamcoback/inference/InferenceResultApiController.java

@@ -1,7 +1,5 @@
 package com.kamco.cd.kamcoback.inference;
 
-import com.kamco.cd.kamcoback.common.download.DownloadExecutor;
-import com.kamco.cd.kamcoback.common.download.dto.DownloadSpec;
 import com.kamco.cd.kamcoback.common.exception.CustomApiException;
 import com.kamco.cd.kamcoback.config.api.ApiResponseDto;
 import com.kamco.cd.kamcoback.inference.dto.InferenceDetailDto;
@@ -28,6 +26,7 @@ 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.time.LocalDate;
 import java.util.List;
@@ -35,7 +34,9 @@ import java.util.Map;
 import java.util.UUID;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.log4j.Log4j2;
+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.DeleteMapping;
@@ -46,7 +47,6 @@ 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;
 
 @Tag(name = "추론관리", description = "추론관리 API")
 @Log4j2
@@ -58,7 +58,6 @@ public class InferenceResultApiController {
   private final InferenceResultService inferenceResultService;
   private final MapSheetMngService mapSheetMngService;
   private final ModelMngService modelMngService;
-  private final DownloadExecutor downloadExecutor;
 
   @Operation(summary = "추론관리 목록", description = "어드민 홈 > 추론관리 > 추론관리 > 추론관리 목록")
   @ApiResponses(
@@ -359,7 +358,7 @@ public class InferenceResultApiController {
         @ApiResponse(responseCode = "500", description = "서버 오류", content = @Content)
       })
   @GetMapping(value = "/download/{uuid}")
-  public ResponseEntity<StreamingResponseBody> download(
+  public ResponseEntity<Resource> download(
       @Parameter(example = "69c4e56c-e0bf-4742-9225-bba9aae39052") @PathVariable UUID uuid)
       throws IOException {
 
@@ -375,10 +374,18 @@ public class InferenceResultApiController {
     }
 
     Path zipPath = Path.of(path);
+    long size = Files.size(zipPath);
+    Resource resource = new org.springframework.core.io.UrlResource(zipPath.toUri());
+
     log.info("shp download request path = {}", path);
 
-    return downloadExecutor.stream(
-        new DownloadSpec(uuid, zipPath, uid + ".zip", MediaType.APPLICATION_OCTET_STREAM));
+    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);
   }
 
   @Operation(summary = "shp 파일 다운로드 이력 조회", description = "추론관리 분석결과 shp 파일 다운로드 이력 조회")