InMemoryUploadedFile是用户上传到django后端的图片对象，对它的使用方法如下。

import base64
from django.db import models
from django.core.cache import cache
from django.http import JsonResponse
from django.core.files.uploadedfile import InMemoryUploadedFile


class Images(models.Model):
    image = models.ImageField('图片', upload_to='images', default='')


def receive_image(request):
    image = request.POST['image']
    image_data = [image.file, image.field_name, image.name, image.content_type,
                  image.size, image.charset, image.content_type_extra]
    cache_key = 'image_key'
    cache.set(cache_key, image_data, 60)

    cache_data = cache.get(cache_key)
    image = InMemoryUploadedFile(*cache_data)
    Images(image=image).save()


def send_image_url(request):
    image = Images.objects.first()
    return JsonResponse({'code': '0', 'image_url': image.name})
    # 在JS中使用数据: $('img').attr('src', result.image_url);


def send_image_data(request):
    image = Images.objects.first()
    return JsonResponse({'code': '0', 'image_data': 'data:image/jpeg;base64,%s' % base64.b64encode(image.file.read()).decode()})
    # 在JS中使用数据: $('img').attr('src', result.image_data);