add internal feign key

src/main/java/ru/soune/nocopy/adminpanel/controller/AdminController.java

@@ -17,6 +17,8 @@ import ru.soune.nocopy.adminpanel.handler.RequestHandler;
 import ru.soune.nocopy.adminpanel.service.AdminSectionPermissionService;
 import ru.soune.nocopy.adminpanel.util.MessageCode;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.Map;
 
 @RestController
@@ -134,9 +136,12 @@ public class AdminController {
         try {
             ResponseEntity<byte[]> response = dashBoardAppClient.download(fileId);
 
-            StreamingResponseBody stream = outputStream -> {
+            StreamingResponseBody streamBody = new StreamingResponseBody() {
-                outputStream.write(response.getBody());
+                @Override
-                outputStream.flush();
+                public void writeTo(OutputStream outputStream) throws IOException {
+                    outputStream.write(response.getBody());
+                    outputStream.flush();
+                }
             };
 
             return ResponseEntity.ok()
@@ -145,7 +150,7 @@ public class AdminController {
                             response.getHeaders().getFirst(HttpHeaders.CONTENT_DISPOSITION))
                     .header(HttpHeaders.CACHE_CONTROL,
                             response.getHeaders().getFirst(HttpHeaders.CACHE_CONTROL))
-                    .body(stream);
+                    .body(streamBody);
         } catch (FeignException.NotFound e) {
             return ResponseEntity.notFound().build();
         } catch (FeignException e) {