django 文件的上传

上传文件

1. form表单上传文件

   <form action="/upload/" method="post" enctype="multipart/form-data"> 
     {% csrf_token %}
     头像: <input type="file" name="head-pic">
     用户名: <input type="text" name="username">
     <input type="submit">
   </form>
   
   
   def upload(request):
       if request.method == 'GET':
   
           return render(request,'upload.html')
       else:
           print(request.POST)  #拿到的是post请求的数据,可是文件相关数据须要用request.FILES去拿
           print(request.FILES) #<MultiValueDict: {'head-pic': [<InMemoryUploadedFile: 1.png (image/png)>]}>
           file_obj = request.FILES.get('head-pic')
           print(file_obj)
           file_name = file_obj.name
   
   
           # f = open('xx.txt','rb')
           # with open('xx.txt','wb') as f2:
           #     for i in f:
           #         f2.write(i)
           import os
           path = os.path.join(settings.BASE_DIR,'statics','img',file_name)
           with open(path,'wb') as f:
               for i in file_obj:
                   f.write(i)
            #for chunk in  file_obj.chunks():
               #    f.write(chunk)
   
           return HttpResponse('ok')

2. ajax上传文件

   var formdata = new FormData();
   formdata.append('user',$('#username').val())
   formdata.append('csrfmiddlewaretoken',$('[name=csrfmiddlewaretoken]').val())
   formdata.append('file',$('#file')[0].files[0])
   $.ajax({
    url:'/upload/',
    type:'post',
    data:formdata,
    success:function(response){
        response
   
    }
   
   })
   
   def upload(request):
       if request.method == 'GET':
   
           return render(request,'upload.html')
       else:
           print(request.POST)  #拿到的是post请求的数据,可是文件相关数据须要用request.FILES去拿
           print(request.FILES) #<MultiValueDict: {'head-pic': [<InMemoryUploadedFile: 1.png (image/png)>]}>
           file_obj = request.FILES.get('head-pic')
           print(file_obj)
           file_name = file_obj.name
   
   
           # f = open('xx.txt','rb')
           # with open('xx.txt','wb') as f2:
           #     for i in f:
           #         f2.write(i)
           import os
           path = os.path.join(settings.BASE_DIR,'statics','img',file_name)
           with open(path,'wb') as f:
               for i in file_obj:
                   f.write(i)
            #for chunk in  file_obj.chunks():
               #    f.write(chunk)
   
           return HttpResponse('ok')

JsonResponse

def index(request):

​   d1 = {'name':'chao'}

​   import json

​   return HttpResponse(json.dumps(d1))  -- success:function(res){ var a = JSON.parse(res) }

​   return HttpResponse(json.dumps(d1),content-type='application/json') --success:function(res){res--自定义对象,不须要本身在反序列化了}

​   return JsonResponse(d1)

​   d1 = [11,22]  #非字典类型的数据都须要加safe=False

​   return JsonResponse(d1,safe=False)

获取多对多数据的时候

authors = request.POST.getlist('authors')

json序列化时间日期类型的数据的方法

import json
from datetime import datetime
from datetime import date

#对含有日期格式数据的json数据进行转换
class JsonCustomEncoder(json.JSONEncoder):
    def default(self, field):
        if isinstance(field,datetime):
            return field.strftime('%Y-%m-%d %H:%M:%S')
        elif isinstance(field,date):
            return field.strftime('%Y-%m-%d')
        else:
            return json.JSONEncoder.default(self,field)


d1 = datetime.now()

dd = json.dumps(d1,cls=JsonCustomEncoder)
print(dd)