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fix(server): Handle empty lines in server list response#152

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quzard wants to merge 1 commit intonacos-group:masterfrom
quzard:patch-1
Open

fix(server): Handle empty lines in server list response#152
quzard wants to merge 1 commit intonacos-group:masterfrom
quzard:patch-1

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@quzard
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@quzard quzard commented Jun 26, 2025

Motivation:

The current server list parsing logic in ServerListManager is not resilient to empty lines in the server response. A response with a trailing newline (e.g., 1.1.1.1:8848\n2.2.2.2:8848\n) would result in an empty string after splitting, which could cause parsing errors or undefined behavior downstream.

Changes:

  1. Add a guard: Skip empty strings during the parsing loop to prevent errors.
  2. Add a debug log: Output the raw server list content to make it easier to diagnose server response issues in the future.

This improves the overall stability of the server discovery mechanism.

**Motivation:**

The current server list parsing logic in `ServerListManager` is not resilient to empty lines in the server response. A response with a trailing newline (e.g., `1.1.1.1:8848\n2.2.2.2:8848\n`) would result in an empty string after splitting, which could cause parsing errors or undefined behavior downstream.

**Changes:**

1.  **Add a guard:** Skip empty strings during the parsing loop to prevent errors.
2.  **Add a debug log:** Output the raw server list content to make it easier to diagnose server response issues in the future.

This improves the overall stability of the server discovery mechanism.
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CLAassistant commented Jun 26, 2025

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@lingma-agents
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lingma-agents bot commented Jun 26, 2025

修复服务器列表解析时空行导致的错误

变更概述

问题修复

  • 组件: ServerListManager 类的 pullServerList() 方法
  • 修复内容:
    • 添加空字符串过滤逻辑:在解析服务器列表时,跳过空行(通过检查 it->empty() 条件)
    • 增加调试日志:记录原始服务器列表内容 (serverRes.content) 以辅助故障排查
  • 技术细节:
    • for 循环中添加 if (it->empty()) continue; 语句,避免空字符串进入后续解析流程
    • 使用 log_debug 输出原始响应内容,便于追溯异常响应格式
  • 修复价值: 解决因服务器响应包含空行(如末尾换行符)导致的解析失败或空指针异常,提升服务发现机制的健壮性
变更文件
文件路径 变更说明
src/​server/​ServerListManager.​cpp 添加空行过滤逻辑及调试日志记录
时序图
sequenceDiagram
    participant Client as Nacos Client
    participant SLM as ServerListManager
    participant Utils as ParamUtils
    Client->>SLM: 请求服务器列表
    SLM->>Utils: 拆分服务器响应内容(按换行符)
    Utils-->>SLM: 返回包含空元素的字符串列表
    SLM->>SLM: 过滤空元素并记录原始内容
    SLM-->>Client: 返回有效服务器列表
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