django-rest-framework导致RawPostDataException：您不能访问body [英] django-rest-framework causes RawPostDataException: You cannot access body

问题描述

  //客户端
 $ .ajax（ {
 type：POST，
 url：api，
 contentType：application / json; charset = utf-8，
 headers：{'X-CSRFToken '：'{{csrf_token}}'}，
 data：JSON.stringify（{
x：$（＃x）。val（），
}），
 success：response，
 dataType：'json'，
 minLength：0，
}）; 
 
＃server  -  views.py：
 @staff_member_required 
 def api（request）：
 params = request.POST 
  

但是除了ajax方法之外，我想要一种辅助方法来允许人们使用令牌认证，因此我修改了view.py，如下所示： p>

 ＃server  -  views.py：
 @api_view（['GET'，'POST']）
 @authentication_classes（（TokenAuthentication，SessionAuthentication，BasicAuthentication））
 @permission_classes（（IsAuthenticated，））
 @staff_member_required 
 def api（request）：
 params = request.POST 
  

和令牌验证客户端代码：

  headers = {'Authorization'：'Token {}'。format（mytoken），'Content-Type'：'application / json'} 
 response = requests.post（BASE_URL， header = headers，json = data）
  

一旦添加了@api_view，我的ajax请求会导致服务器错误：

 错误：内部服务器错误：/ api 
追溯（最近的最后一次呼叫）：
文件venv / lib / python2.7 / site-packages / django / core /handlers/base.py，第132行，get_response 
 response = wrapped_callback（request，* callback_args，** callback_kwargs）
文件venv / lib / python2.7 / site-packages / django / views / decorators / csrf.py，第58行，wrapped_view 
 return view_func（* args，** kwargs）
文件venv / lib / python2.7 / site-packages / django / views /通用/ base.py，第71行，视图
 return self.dispatch（request，* args，** kwargs）
文件venv / lib / python2.7 / site-packages / rest_framework / views.py，第466行，在调度中
 response = self.handle_exception（exc）
文件venv / lib / python2.7 / site-packages / rest_framework / views.py，第463行，在调度
 response = handler（request，* args，** kwargs）
文件venv / lib / python2.7 / site-packages / rest_framework / decorators.py，第53行，处理程序
 return func（* args，** kwargs）
 Fil evenv / lib / python2.7 / site-packages / django / contrib / auth / decorators.py，第22行，_wrapped_view 
 return view_func（request，* args，** kwargs）
文件/home/mike/mike/myapp/myapp/myapp/views.py，第422行，api 
 params = json.loads（request.body）
文件venv / lib / python2 .7 / site-packages / rest_framework / request.py，第357行，__getattribute__ 
 return getattr（self._request，attr）
文件venv / lib / python2.7 / site-packages / django / http / request.py，第231行，身体
 raise RawPostDataException（从请求的数据流读取后，您无法访问正文）
 RawPostDataException：从请求的数据流读取后无法访问正文
  

解决方案

显然，一旦你使用django-rest-framework，你必须使用

  params = request.data 
  

来检索数据。
http://www.django-rest-framework.org/ api-guide / requests /

感谢django-rest-framework IRC。

I have this code that works fine with my ajax request:

    // client
    $.ajax({
        type: "POST",
        url: "api",
        contentType: "application/json; charset=utf-8",
        headers: {'X-CSRFToken': '{{ csrf_token }}'},
        data: JSON.stringify({
            x: $("#x").val(),
        }),
        success: response,
        dataType: 'json',
        minLength: 0,
    });

# server - views.py:
@staff_member_required
def api(request):
    params = request.POST

but in addition to the ajax approach, I want a secondary approach to allow people use token authentication so I modified the view.py as below:

# server - views.py:
@api_view(['GET', 'POST'])
@authentication_classes((TokenAuthentication, SessionAuthentication, BasicAuthentication))
@permission_classes((IsAuthenticated,))
@staff_member_required
def api(request):
    params = request.POST

and the token authentication client code:

headers = {'Authorization': 'Token {}'.format(mytoken), 'Content-Type': 'application/json'}
response = requests.post(BASE_URL, headers=headers, json=data)

As soon as I add @api_view, my ajax request causes a server error:

ERROR: Internal Server Error: /api
Traceback (most recent call last):
  File "venv/lib/python2.7/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "venv/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "venv/lib/python2.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "venv/lib/python2.7/site-packages/rest_framework/views.py", line 466, in dispatch
    response = self.handle_exception(exc)
  File "venv/lib/python2.7/site-packages/rest_framework/views.py", line 463, in dispatch
    response = handler(request, *args, **kwargs)
  File "venv/lib/python2.7/site-packages/rest_framework/decorators.py", line 53, in handler
    return func(*args, **kwargs)
  File "venv/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 22, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/home/mike/mike/myapp/myapp/myapp/views.py", line 422, in api
    params = json.loads(request.body)
  File "venv/lib/python2.7/site-packages/rest_framework/request.py", line 357, in __getattribute__
    return getattr(self._request, attr)
  File "venv/lib/python2.7/site-packages/django/http/request.py", line 231, in body
    raise RawPostDataException("You cannot access body after reading from request's data stream")
RawPostDataException: You cannot access body after reading from request's data stream

解决方案

Apparently once you use django-rest-framework, you'll have to use

params = request.data

to retrieve data. http://www.django-rest-framework.org/api-guide/requests/

Thanks to django-rest-framework IRC.

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