# django.http.request.RawPostDataException: You cannot access body after reading from request's data stream

- **ID:** `python/django-request-data-error`
- **Domain:** python
- **Category:** runtime_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

多次尝试读取请求体，但请求体只能读取一次

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.2 | active | — | — |
| 4.0 | active | — | — |
| 5.0 | active | — | — |

## Workarounds

1. **一次性读取并缓存** (95% success)
   ```
   data = request.body; 之后使用 data 变量
   ```
2. **使用中间件缓存请求体** (90% success)
   ```
   使用 django.utils.datastructures.MultiValueDictKeyError 处理
   ```

## Dead Ends

- **尝试重新读取 request.body** — 请求体流已消耗，无法再次读取 (100% fail)
- **使用 request.POST 代替** — 如果请求是 JSON，request.POST 可能为空 (60% fail)