源码怎么找之rest_framework的用户认证

from django.conf.urls import url
from django.contrib import admin
from app01 import viewsurlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^test/', views.TestView.as_view()),
]

from django.shortcuts import HttpResponsefrom rest_framework.views import APIView#导入rest_framework的试图类class TestView(APIView):
self.dispatch#只是为了进源码
def get(self,request,*args,**kwargs):
return HttpResponse('ok')

def dispatch(self, request, *args, **kwargs):#这是APIView类的入口
"""
`.dispatch()` is pretty much the same as Django's regular dispatch,
but with extra hooks for startup, finalize, and exception handling.
和Django的dispatch类似，但是增加了额外的钩子，比如开始，结束，以及异常的处理
"""
self.args = args #封装参数
self.kwargs = kwargs
request = self.initialize_request(request, *args, **kwargs) #重新封装了request
self.request = request
self.headers = self.default_response_headers # deprecate? try:
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

def initialize_request(self, request, *args, **kwargs):
"""
Returns the initial request object.
返回初始化后的request
"""
parser_context = self.get_parser_context(request) return Request(
request,
parsers=self.get_parsers(),
authenticators=self.get_authenticators(), #重点关注这个，看名字就应该找到这个，继续点进去
negotiator=self.get_content_negotiator(),
parser_context=parser_context
)

def get_authenticators(self):
"""
Instantiates and returns the list of authenticators that this view can use.
"""
return [auth() for auth in self.authentication_classes] #从配置读取用户认证配置，然后实例化，点进这个self.authentication_classes

class APIView(View): # The following policies may be set at either globally, or per-view.
renderer_classes = api_settings.DEFAULT_RENDERER_CLASSES
parser_classes = api_settings.DEFAULT_PARSER_CLASSES
authentication_classes = api_settings.DEFAULT_AUTHENTICATION_CLASSES#
throttle_classes = api_settings.DEFAULT_THROTTLE_CLASSES

[<class 'rest_framework.authentication.SessionAuthentication'>, <class 'rest_framework.authentication.BasicAuthentication'>]

from rest_framework.authentication import SessionAuthentication

class BaseAuthentication(object):
"""
All authentication classes should extend BaseAuthentication.
""" def authenticate(self, request):
"""
Authenticate the request and return a two-tuple of (user, token).
"""
raise NotImplementedError(".authenticate() must be overridden.") def authenticate_header(self, request):
"""
Return a string to be used as the value of the `WWW-Authenticate`
header in a `401 Unauthenticated` response, or `None` if the
authentication scheme should return `403 Permission Denied` responses.
"""
pass

def initial(self, request, *args, **kwargs):
"""
Runs anything that needs to occur prior to calling the method handler.
"""
self.format_kwarg = self.get_format_suffix(**kwargs) # Perform content negotiation and store the accepted info on the request neg = self.perform_content_negotiation(request)
request.accepted_renderer, request.accepted_media_type = neg # Determine the API version, if versioning is in use. version, scheme = self.determine_version(request, *args, **kwargs)
request.version, request.versioning_scheme = version, scheme # Ensure that the incoming request is permitted
#用户认证
self.perform_authentication(request) self.check_permissions(request) self.check_throttles(request)

def perform_authentication(self, request):
"""
Perform authentication on the incoming request. Note that if you override this and simply 'pass', then authentication
will instead be performed lazily, the first time either
`request.user` or `request.auth` is accessed.
"""
request.user

@property
def user(self):
"""
Returns the user associated with the current request, as authenticated
by the authentication classes provided to the request.
"""
if not hasattr(self, '_user'):
self._authenticate()
return self._user

def _authenticate(self):
"""
Attempt to authenticate the request using each authentication instance
in turn.
"""
for authenticator in self.authenticators:#
try:
user_auth_tuple = authenticator.authenticate(self)
except exceptions.APIException:
self._not_authenticated()
raise if user_auth_tuple is not None:
self._authenticator = authenticator
self.user, self.auth = user_auth_tuple
return self._not_authenticated()

def authenticate(self, request):
return (self.force_user, self.force_token)

def _not_authenticated(self):
"""
Set authenticator, user & authtoken representing an unauthenticated request. Defaults are None, AnonymousUser & None.
"""
self._authenticator = None if api_settings.UNAUTHENTICATED_USER:
self.user = api_settings.UNAUTHENTICATED_USER()
else:
self.user = None if api_settings.UNAUTHENTICATED_TOKEN:
self.auth = api_settings.UNAUTHENTICATED_TOKEN()
else:
self.auth = None

api_settings = APISettings(None, DEFAULTS, IMPORT_STRINGS)

'UNAUTHENTICATED_USER': 'django.contrib.auth.models.AnonymousUser',
'UNAUTHENTICATED_TOKEN': None,

from django.shortcuts import HttpResponsefrom rest_framework.views import APIView#导入rest_framework的试图类from rest_framework.authentication import BaseAuthentication
from rest_framework import exceptions
from . import models
class CustomAuthenticate(BaseAuthentication):
"""
All authentication classes should extend BaseAuthentication.
""" def authenticate(self, request):
"""
Authenticate the request and return a two-tuple of (user, token).
"""
tk = request.query_param.get('tk') #获取用户输入的token 简化写法，就直接在url中传参了
token_obj = models.Token.objects.filter(token=tk).first()
if token_obj:
return (token_obj.user,token_obj) raise exceptions.AuthenticationFailed('请登录') #抛出异常表示不允许匿名用户访问 # else:
# return (None,None)
def authenticate_header(self, request):
"""
Return a string to be used as the value of the `WWW-Authenticate`
header in a `401 Unauthenticated` response, or `None` if the
authentication scheme should return `403 Permission Denied` responses.
"""
pass
class TestView(APIView):
authentication_classes = [CustomAuthenticate,] #应用认证配置类
def get(self,request,*args,**kwargs):
return HttpResponse('ok')