[ADD] 새로운 파일 다운로드 API 구현 (MinioAttachmentController)

src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java

@@ -1,10 +1,13 @@
 package kr.re.etri.autoflow.controllers;
 
+import io.minio.DownloadObjectArgs;
 import io.minio.GetObjectArgs;
 import io.minio.MinioClient;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.servlet.ServletOutputStream;
+import jakarta.servlet.http.HttpServletResponse;
 import kr.re.etri.autoflow.entity.MinioAttachmentEntity;
 
 import kr.re.etri.autoflow.payload.request.ProjectBaseSearchRequest;
@@ -13,14 +16,22 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springdoc.core.annotations.ParameterObject;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.core.io.Resource;
 import org.springframework.data.domain.Page;
 import org.springframework.http.*;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
+import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.*;
 
 @RestController
@@ -101,6 +112,34 @@ public class MinioAttachmentController {
         }
     }
 
+    @GetMapping("/download_new")
+    public ResponseEntity<Resource> downloadFile_new(@RequestParam String objectName) {
+        try {
+            // MinIO에서 스트리밍으로 가져오기
+            InputStream is = minioClient.getObject(
+                    GetObjectArgs.builder()
+                            .bucket("mlpipeline")
+                            .object(objectName)
+                            .build()
+            );
+
+            InputStreamResource resource = new InputStreamResource(is);
+
+            String encodedFileName = URLEncoder.encode(objectName, StandardCharsets.UTF_8)
+                    .replaceAll("\\+", "%20");
+
+            return ResponseEntity.ok()
+                    .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename*=UTF-8''" + encodedFileName)
+                    .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                    .body(resource);
+
+        } catch (Exception e) {
+            log.error("파일 다운로드 실패", e);
+            return ResponseEntity.internalServerError().build();
+        }
+    }
+
+
     @Operation(summary = "MinIO YAML 파일 읽기", description = "MinIO에서 YAML 파일을 다운로드하여 텍스트로 반환합니다.")
     @GetMapping(value = "/readYamlText", produces = MediaType.TEXT_PLAIN_VALUE)
     public ResponseEntity<String> readYamlTextFromMinio(@RequestParam String objectName) {