go runtime_error ai_generated true

http：多余的 response.WriteHeader 调用，来自 main.handler（server.go:42）

http: superfluous response.WriteHeader call from main.handler (server.go:42)

ID: go/http-superfluous-writeheader

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-06-11首次发现

版本兼容性

版本状态引入弃用备注
1.18 active — — —
1.21 active — — —

根因分析

WriteHeader 被调用多次，或在 WriteHeader 之前调用了 Write。只有第一个状态码会被发送。

English

WriteHeader is called more than once, or Write is called before WriteHeader. Only the first status code is sent.

generic

解决方案

  1. 90% 成功率 
    if !wroteHeader { w.WriteHeader(http.StatusOK); wroteHeader = true }
json.NewEncoder(w).Encode(v)
  2. 88% 成功率 
    Return early after writing an error status; never write body after WriteHeader without checking.

无效尝试

常见但无效的做法:

  1. 80% 失败

    Hides a real bug; the wrong status code may be sent to clients.

  2. 70% 失败

    Does not fix the underlying control flow.