Django学习日志05

print(request.POST) # 接收的都是普通的数据，非文件数据
    # ]}>
print(request.FILES) # 只接受文件数据，普通数据还在request.POST里面
def index(request):
    # user_dict = {'username':'kevin你好'}
    user_dict = [1, 2, 3, 4]
    # res=json.dumps(user_dict,ensure_ascii=False)
    # return  HttpResponse(res)
    # 通过看源码学技术
    # return JsonResponse(user_dict,json_dumps_params={'ensure_ascii':False})
    # return JsonResponse(user_dict,safe=False)
    # return JsonResponse(user_dict,safe=False)
    # 
    # 
    print(request.POST)
    # ]}>
    file_obj=request.FILES.get('myfile')
    # file_list = file_obj.name.split('.') # 123.png
 
    # import uuid
    # random_str=str(uuid.uuid4())
    # file_name = random_str + file_obj.name.split('.')[-1]
    # with open(file_name, 'wb') as f:
    #     for line in file_obj:
    #         f.write(line)
    # print(request.body) # 接收纯原生的二进制数据，没有任何的处理 b''----> str---->decode---->dict...
    # print(request.POST.get('')) # 之所以你能够直接按照字典的方式取值，是因为django给做了封装
    print(request.path)  # /index/  /index/
    print(request.path_info) # /index/   /index/
    print(request.get_full_path()) # /index/  /index/?a=1&b=2
    print(request.GET.get(''))
    return render(request,'index.html')

CBV的写法

FBV: function based view # 写的都是函数
CBV: class based view # 写的都是类
from django.views import View
 
 
class MyLogin(View):
    def get(self, request):
        print('get。。。')
        return HttpResponse("get")
 
    def post(self, request):
        return HttpResponse("hello postman!!!")
    
url(r'^login/', views.MyLogin.as_view()),

CBV的源码分析

# 入口
url(r'^login/', views.MyLogin.as_view()),
 
# View类中得as_view方法的返回值是view函数名
# 当请求来的时候，会触发view函数的执行
def view(request, *args, **kwargs):
    # cls:Mylogin()------>self对象
    self = cls(**initkwargs)
    return self.dispatch(request, *args, **kwargs)  # View类里的dispatch
 
def dispatch(self, request, *args, **kwargs):
    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
    return handler(request, *args, **kwargs)
 
from django.views import View
 
 
class MyLogin(View):
    http_method_names = ['get', 'post']
    def get(self, request):
        print('get。。。')
        self.index()
        return HttpResponse("get")
 
    def post(self, request):
        return HttpResponse("hello postman!!!")
 
    def index(self):
        pass

 权限、频率、jwt的源码

模板层值模版变量

在html页面中写一个python的代码
PHP：不是后端语言，前端 操作数据量，写逻辑，都可以
python也有点像

{{ 写变量 }}
{% 写逻辑 %}

{{ d.0 }}
{{ d.1 }}
{{ d.3 }}
{{ user_dict.hobby.2 }}
{{ index }}
{{ obj.score }}