django服务器端对象

1. 解决post数据接收不到的问题

   settings.py中可能要注释掉：# 'django.middleware.csrf.CsrfViewMiddleware',
   

2. get型数据

   http://localhost:8080/user/login/?name=tom
   request.GET.get('name')
   request.GET['name']
   

3. post型数据

   #post数据为form-data或者x-www-urlencoded
   request.POST.get('name')
   request.GET['name']
   #post数据为json
   data=json.loads(request.body)
   print(data['name'])
   

4. 获取header中的信息

   #key要加HTTP前缀，并且大写
   token=request.META.get('HTTP_TOKEN')
   print('token')
   

5. HttpResponse(数据，状态码，cookie)

   return HttpResponse(json.dumps(content),status=200,charset='utf-8',content_type='application/json')		
   

6. JsonResponse(),直接返回json型数据

   	content={
           "code":"888"
       }
      resp=JsonResponse(content,status=200,charset='utf-8',content_type='application/json')
      # 设置cookie的过期时间
      date_int = datetime.utcnow() + timedelta(hours=1)
      # 创建会话
      resp.set_cookie('token', value='1234567890', expires=date_int)
      return resp
   

7. HttpResponseRedirect重定向

   return HttpResponseRedirect(reverse('position:index'))
   

8. 序列化，从数据库取出数据后，返回给客户端应该为json格式

   from django.core import serializers
   ret = models.BookType.objects.all()
   data = serializers.serialize("json", ret)
   

9. json.dumps无法处理datatime格式，所以要自定义处理器

   import json 
   from datetime import date 
   from datetime import datetime 
      
   class JsonCustomEncoder(json.JSONEncoder): 
       
       def default(self, field): 
        
           if isinstance(field, datetime): 
               return o.strftime('%Y-%m-%d %H:%M:%S') 
           elif isinstance(field, date): 
               return o.strftime('%Y-%m-%d') 
           else: 
               return json.JSONEncoder.default(self, field) 
   

10. 自定义中间件

    在根目录下简历mymiddleware文件夹，创建py文件，在里面写
    
    from django.http import HttpResponse
    from django.utils.deprecation import MiddlewareMixin
    class RequestAuth(MiddlewareMixin):
        def process_request(self, request):
            print(request.GET.get('id'))
            print('333')
            # return HttpResponse('sorry')
        def process_view(self, request, callback, callback_args, callback_kwargs):
            i = 1
            print('444')
            pass
        def process_exception(self, request, exception):
            print('555')
            return HttpResponse(exception)
        def process_response(self, request, response):
            print('666')
            return response
    
    还有在setting文件里加入
    MIDDLEWARE = [
    # 自定义中间件
    # 'mymiddlewares.middlewareauth.RequestAuth',
    ]