解决文件不存在时出现的异常

broker/src/main/java/com/xiaoleilu/loServer/action/FileAction.java

@@ -46,21 +46,28 @@ public class FileAction extends Action {
             return true;
         }
 
-        final File file = getFileByPath(request.getPath());
-        Logger.debug("Client [{}] get file [{}]", request.getIp(), file.getPath());
+        File file = null;
+        try {
+            file = getFileByPath(request.getPath());
+        } catch (Exception e) {
+            response.sendError(HttpResponseStatus.NOT_FOUND, "404 File not found!");
+            return true;
+        }
 
-        // 隐藏文件，跳过
-        if (file.isHidden() || !file.exists()) {
+        // 隐藏文件或不存在，跳过
+        if (file == null || file.isHidden() || !file.exists()) {
             response.sendError(HttpResponseStatus.NOT_FOUND, "404 File not found!");
             return true;
         }
 
         // 非文件，跳过
-        if (false == file.isFile()) {
+        if (!file.isFile()) {
             response.sendError(HttpResponseStatus.FORBIDDEN, "403 Forbidden!");
             return true;
         }
 
+        Logger.debug("Client [{}] get file [{}]", request.getIp(), file.getPath());
+        
         // Cache Validation
         String ifModifiedSince = request.getHeader(HttpHeaderNames.IF_MODIFIED_SINCE.toString());
         if (StrUtil.isNotBlank(ifModifiedSince)) {