# http: superfluous response.WriteHeader call

- **ID:** `go/http-multiple-response-write`
- **Domain:** go
- **Category:** runtime_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

在同一个响应上多次调用WriteHeader方法

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.14 | active | — | — |

## Workarounds

1. **** (95% success)
   ```
   使用sync.Once确保WriteHeader只调用一次
   ```
2. **** (90% success)
   ```
   重构逻辑，确保每个分支只写一次
   ```

## Dead Ends

- **** — 可能导致响应状态码混乱 (50% fail)
- **** — Write会隐式调用WriteHeader (70% fail)