目录
- Django rest framework（1）----认证
- Django rest framework（2）----权限
- Django rest framework（3）----节流
- Django rest framework（4）----版本
- Django rest framework（5）----解析器
- Django rest framework（6）----序列化
- Django rest framework（7）----分页
解析器
（1）api/urls.py
# api/urls.py from django.urls import path,re_path
from .views import UserView,PaserView urlpatterns = [
re_path('(?P<version>[v1|v2]+)/users/', UserView.as_view(),name = 'api_user'),
path('paser/', PaserView.as_view(),), #解析
]
（2）views.py
from rest_framework.parsers import JSONParser,FormParser
class PaserView(APIView):
parser_classes = [JSONParser,FormParser,]
#JSONParser：表示只能解析content-type:application/json的头
#FormParser:表示只能解析content-type:application/x-www-form-urlencoded的头
def post(self,request,*args,**kwargs):
#获取解析后的结果
print(request.data)
return HttpResponse('paser')（3）通过postman发送Json数据
在后台可以获取发过来的Json数据
源码流程
（1）dispatch
def dispatch(self, request, *args, **kwargs):
"""
`.dispatch()` is pretty much the same as Django's regular dispatch,
but with extra hooks for startup, finalize, and exception handling.
"""
self.args = args
self.kwargs = kwargs
#对原始request进行加工，丰富了一些功能
#Request(
# request,
# parsers=self.get_parsers(),
# authenticators=self.get_authenticators(),
# negotiator=self.get_content_negotiator(),
# parser_context=parser_context
# )
#request(原始request,[BasicAuthentications对象，])
#获取原生request,request._request
#获取认证类的对象，request.authticators
#1.封装request
request = self.initialize_request(request, *args, **kwargs)
self.request = request
self.headers = self.default_response_headers # deprecate? try:
#2.认证
self.initial(request, *args, **kwargs) # Get the appropriate handler method
if request.method.lower() in self.http_method_names:
handler = getattr(self, request.method.lower(),
self.http_method_not_allowed)
else:
handler = self.http_method_not_allowed response = handler(request, *args, **kwargs) except Exception as exc:
response = self.handle_exception(exc) self.response = self.finalize_response(request, response, *args, **kwargs)
return self.response
（2）initialize_request
获取所有解析器
def initialize_request(self, request, *args, **kwargs):
"""
Returns the initial request object.
"""
parser_context = self.get_parser_context(request) return Request(
request,
parsers=self.get_parsers(), #获取所有的解析器
authenticators=self.get_authenticators(), #[BasicAuthentication(),],把所有的认证类对象封装到request里面了
negotiator=self.get_content_negotiator(),
parser_context=parser_context
)
（3）get_parsers
def get_parsers(self):
"""
Instantiates and returns the list of parsers that this view can use.
"""
return [parser() for parser in self.parser_classes]
（4）parser_classes
同样我们可以在settings里面全局配置
#全局配置
REST_FRAMEWORK = {
#版本
"DEFAULT_VERSIONING_CLASS":"rest_framework.versioning.URLPathVersioning",
#解析器
"DEFAULT_PARSER_CLASSES":["rest_framework.parsers.JSONParser","rest_framework.parsers.FormParser"]
}