django实现从数据库获取图片在前端显示并下载

#url设置
from django.contrib import admin
from django.urls import path, include
from django.conf.urls.static import static
from django.conf import settings

urlpatterns = [
    path('admin/', admin.site.urls),
    path('student/', include('app01.urls')),
    path('student/', include('app01.urls')),
]+static(settings.MEDIA_URL,document_root=settings.MEDIA_ROOT)

###view设置

def showall_view(request):
    #读取所有信息
    stus = Student.objects.all()
    return render(request,'show.html',{'stus':stus})

def download_view(request):
    #获取请求参数
    photo = request.GET.get('photo','')
    filename = photo[photo.rindex('/')+1:]
    path = os.path.join(os.getcwd(),'media',photo.replace('/','\\'))
    print(path)
    #开启一个流
    with open(path,'rb') as fr:
        response = HttpResponse(fr.read())
        response['Content-Type']='image/png'

    return response

###前端设置

{% for stu in stus %}
    <tr>
        <td>{{ forloop.counter }}</td>
        <td>{{ stu.sname }}</td>
        <td><img width="200px" src="{{MEDIA_URL}}{{ stu.photo }}" alt=""></td>
        <td><a href="/student/download/?photo={{ stu.photo }}">下载</a></td>

    </tr>