Question

我正在使用handle_uploaded_file通过多线程异步将CSV文件保存到文本文件，但是一旦home函数返回HTTP响应，传递给函数的file参数就会关闭。我不想保存文件并从该位置使用它，但是想在内存中可用它时使用它。

ValueError：寻求关闭的文件

def handle_uploaded_file(f):
    destination =  open('name.txt', 'ab+')
    for chunk in f.chunks():
        destination.write(chunk)
    destination.close()

def home(request):
    if request.method=="POST":
        file = UploadForm(request.POST, request.FILES)
        if file.is_valid():
            g = request.FILES.dict()
            File = g['file']
            print(File)
            uploader_thread = Thread(target=handle_uploaded_file, args=[File])
            uploader_thread.start()
            file.save()
            return HttpResponseRedirect(reverse('imageupload'))
    else:
        file=UploadForm()
    files=Upload.objects.all().order_by('-upload_date')
    return render(request,'home.html',{'form':file}) #,'files':files})

Answer 1

尝试这样。

import copy
def upload_handler(inmemory_file):
    with open(inmemory_file.name, 'wb+') as destination:
        for chunk in inmemory_file.chunks():
            destination.write(chunk)

def home(request):
    if request.method=="POST":
        file = UploadForm(data=request.POST, files=request.FILES)
        if file.is_valid():
            memory_file = copy.deepcopy(request.FILES['file'])
            upload_thread = Thread(target=upload_handler, args=(memory_file,))
            upload_thread.start()
            file.save()
            return HttpResponseRedirect(reverse('imageupload'))
    else:
        file=UploadForm()
    files=Upload.objects.all().order_by('-upload_date')
    return render(request,'home.html',{'form':file}) #,'files':files})

返回HttpResponse后上载的表单文件被删除

1 个答案: