# http: invalid Cookie.Domain

- **ID:** `go/http-cookie-invalid-domain`
- **Domain:** go
- **Category:** config_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

设置Cookie时Domain字段包含非法字符或格式错误

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.22 | active | — | — |

## Workarounds

1. **** (90% success)
   ```
   验证Domain格式，使用合法域名
   ```
2. **** (85% success)
   ```
   使用http.Cookie的Sanitize方法
   ```

## Dead Ends

- **** — Cookie可能无法在预期域上工作 (40% fail)
- **** — IP地址不允许作为Domain (80% fail)