Django rest framework1

Content review:

1. development Mode-general development mode (with the frontend and backend written together)-frontend and backend separation 2. backend development provides a URL for the front end (API/interface development). Note: httpresponse3.django fbv, CBV fbv, function base view def users (request): user_list = ['Alex ', 'oldboys'] Return httpresponse (JSON. dumps (user_list) CBV, class base view routing: URL (R' ^ students/', views. studentsview. as_view (), view: from Django. views import View class studentsview (View): def get (self, request, * ARGs, ** kwargs): Return httpresponse ('get') def post (self, request, * ARGs, ** kwargs): Return httpresponse ('post') def put (self, request, * ARGs, ** kwargs): Return httpresponse ('put ') def Delete (self, request, * ARGs, ** kwargs): Return httpresponse ('delete') 4. list generative class FOO: pass class bar: Pass v = [item () for item in [Foo, bar] V Object List 5. object-oriented-encapsulation-encapsulate the same class method in the class file: file addition, deletion, modification, query method class DB: database method-encapsulate data in the object class file: def _ init _ (self, a1, a2): Self. a1 = A1 self. xxx = a2 def get :... obj1 = file (123,456)

Summary today:

1. Restful specification (recommended) 2. Django rest Framework framework

Details:

0. fbv and CBV. Different methods are implemented based on reflection based on different request methods. Principle:. route URL-> View method-> dispatch method (Other reflection execution: Get/post/delete/Put) interview question: 1. django middleware-process_request-process_view-process_response-process_exception-process_render_template 2. what have you done with middleware? -Permission,-User Logon verification-how does Django's csrf implement? Process_view method-check whether the view is @ csrf_exempt (exempt from csrf authentication)-Get token from the request or cookie 3. middleware = ['django. middleware. security. securitymiddleware ', 'django. contrib. sessions. middleware. sessionmiddleware ', 'django. middleware. common. commonmiddleware ', 'django. middleware. csrf. csrfviewmiddleware ', # Use csrf to authenticate 'django. contrib. auth. middleware. authenticationmiddleware ', 'django. contrib. messages. middleware. messagemiddleware ', 'django. middleware. clickjacking. xframeoptionsmiddleware ',] from Django. views. decorators. csrf import csrf_exempt @ csrf_exempt # This function does not require authentication def users (request): user_list = ['Alex ', 'oldboy'] Return httpresponse (JSON. dumps (user_list) CBV tips:-method_decorator (csrf_exempt)-In the dispatch method (the Independent method is invalid) from Django. views. decorators. csrf import csrf_exempt from Django. utils. decorators import method_decorator @ csrf_exempt def users (request): user_list = ['Alex ', 'oldboys'] Return httpresponse (JSON. dumps (user_list) from Django. views import View class studentsview (View): @ method_decorator (csrf_exempt) def dispatch (self, request, * ARGs, ** kwargs): return Super (studentsview, self ). dispatch (request, * ARGs, ** kwargs) def get (self, request, * ARGs, ** kwargs): Return httpresponse ('get') def post (self, request, * ARGs, ** kwargs): Return httpresponse ('post') def put (self, request, * ARGs, ** kwargs): Return httpresponse ('put ') def Delete (self, request, * ARGs, ** kwargs): Return httpresponse ('delete') Summary:-essence: Reflection-based implementation-process: routing, view, dispatch (reflection)-cancel csrf authentication (decorator must be added to the dispatch method and method_decorator decoration) Extension:-csrf-middleware-based process_viewfang1.restful specification (recommended). urlpatterns = [# URL (R' ^ admin/', admin. site. URLs), URL (R' ^ get_order/', views. get_order), URL (R' ^ add_order/', views. add_order), URL (R' ^ del_order/', views. del_order), URL (R' ^ update_order/', views. update_order)] def get_order (request): Return httpresponse ('') def add_order (request): Return httpresponse ('') def del_order (request): Return httpresponse ('') def update_order (request): Return httpresponse ('') B. restful specification (recommended) 1. perform different operations according to the method. The example is based on fbv: URL (r '^ order/', views. order) def Order (request): If request. method = 'get': Return httpresponse ('get Order') Elif request. method = 'post': Return httpresponse ('create Order') Elif request. method = 'put': Return httpresponse ('Update Order') Elif request. method = 'delete': Return httpresponse ('delete Order') based on CBV: urlpatterns = [url (R' ^ order/', views. orderview. as_view ()] class orderview (View): def get (self, request, * ARGs, ** kwargs): Return httpresponse ('get Order') def post (self, request, * ARGs, ** kwargs): Return httpresponse ('create Order') def put (self, request, * ARGs, ** kwargs ): return httpresponse ('Update Order') def Delete (self, request, * ARGs, ** kwargs): Return httpresponse ('delete Order') C. let's talk about our understanding of restful API specifications. 1. essentially a Specification 2. some operations on the API are reflected in the URL. 2. django rest Framework framework pip3 install djangorestframework. authentication-use only-source code process dispatch...

Django rest framework1