# werkzeug.exceptions.RequestEntityTooLarge：413 请求实体太大

- **ID:** `python/flask-request-entity-too-large`
- **领域:** python
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

上传的文件或请求体超过了配置的 MAX_CONTENT_LENGTH。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 2.x | active | — | — |
| 3.x | active | — | — |

## 解决方案

1. **** (90% 成功率)
   ```
   app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024  # 16MB
   ```
2. **** (85% 成功率)
   ```
   Handle file in chunks without loading into memory.
   ```

## 无效尝试

- **** — May cause memory issues and DoS vulnerability. (60% 失败率)
- **** — Removes protection against large payloads. (80% 失败率)