[File] 로컬에서 -> api서버에서 다운로드 가능하게 추가

src/main/java/com/alist/api/common/modules/file/FileController.java

@@ -200,7 +200,7 @@ public class FileController {
             return ResponseEntity.notFound().build();
         }
 
-        if (fileService.isRedirectMode()) {
+        if (fileService.isRedirectMode() || fileService.isLocalTestRequest(request)) {
             return ResponseEntity.status(HttpStatus.FOUND)
                     .location(URI.create(fileService.buildPublicViewUrl(target.getSavePath())))
                     .build();
@@ -240,7 +240,7 @@ public class FileController {
             return ResponseEntity.notFound().build();
         }
 
-        if (fileService.isRedirectMode()) {
+        if (fileService.isRedirectMode() || fileService.isLocalTestRequest(request)) {
             return ResponseEntity.status(HttpStatus.FOUND)
                     .location(URI.create(fileService.buildPublicDownloadUrl(target.getSavePath())))
                     .build();

src/main/java/com/alist/api/common/modules/file/service/FileService.java

@@ -3,6 +3,7 @@ package com.alist.api.common.modules.file.service;
 import com.alist.api.common.modules.file.dto.*;
 import com.alist.api.common.modules.file.mapper.FileMapper;
 import com.alist.api.config.jwt.JwtTokenProvider;
+import jakarta.servlet.http.HttpServletRequest;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.data.redis.core.HashOperations;
@@ -695,4 +696,23 @@ public class FileService {
 
         return baseUrl + prefix + savePath;
     }
+
+    public boolean isLocalTestRequest(HttpServletRequest request) {
+        return containsLocalhost(request.getHeader("Referer"))
+                || containsLocalhost(request.getHeader("Origin"))
+                || containsLocalhost(request.getHeader("Host"))
+                || containsLocalhost(request.getHeader("X-Forwarded-Host"));
+    }
+
+    public boolean containsLocalhost(String value) {
+        if (value == null || value.isBlank()) {
+            return false;
+        }
+
+        String lower = value.toLowerCase();
+        return lower.contains("localhost")
+                || lower.contains("127.0.0.1")
+                || lower.contains("[::1]")
+                || lower.contains("::1");
+    }
 }