我正在试验一个允许用户上传音频文件的网站。我已经阅读了所有可以使用的文档,但找不到太多关于验证文件的信息。
这里的总新手(以前从未做过任何类型的文件验证)并试图弄清楚这一点。有人可以握住我的手,告诉我我需要知道什么吗?
与往常一样,提前感谢您。
我正在试验一个允许用户上传音频文件的网站。我已经阅读了所有可以使用的文档,但找不到太多关于验证文件的信息。
这里的总新手(以前从未做过任何类型的文件验证)并试图弄清楚这一点。有人可以握住我的手,告诉我我需要知道什么吗?
与往常一样,提前感谢您。
您想在将文件写入磁盘之前对其进行验证。当您上传文件时,表单会得到验证,然后上传的文件会被传递给处理实际写入服务器磁盘的处理程序/方法。因此,在这两个操作之间,您需要执行一些自定义验证以确保它是有效的音频文件
你可以:
(我没有测试过这段代码)
模型.py
class UserSong(models.Model):
title = models.CharField(max_length=100)
audio_file = models.FileField()
表格.py
class UserSongForm(forms.ModelForm):
# Add some custom validation to our file field
def clean_audio_file(self):
file = self.cleaned_data.get('audio_file',False):
if file:
if file._size > 4*1024*1024:
raise ValidationError("Audio file too large ( > 4mb )")
if not file.content-type in ["audio/mpeg","audio/..."]:
raise ValidationError("Content-Type is not mpeg")
if not os.path.splitext(file.name)[1] in [".mp3",".wav" ...]:
raise ValidationError("Doesn't have proper extension")
# Here we need to now to read the file and see if it's actually
# a valid audio file. I don't know what the best library is to
# to do this
if not some_lib.is_audio(file.content):
raise ValidationError("Not a valid audio file")
return file
else:
raise ValidationError("Couldn't read uploaded file")
views.py 来自 utils 导入 handle_uploaded_file
def upload_file(request):
if request.method == 'POST':
form = UserSongForm(request.POST, request.FILES)
if form.is_valid():
# If we are here, the above file validation has completed
# so we can now write the file to disk
handle_uploaded_file(request.FILES['file'])
return HttpResponseRedirect('/success/url/')
else:
form = UploadFileForm()
return render_to_response('upload.html', {'form': form})
实用程序.py
# from django's docs
def handle_uploaded_file(f):
ext = os.path.splitext(f.name)[1]
destination = open('some/file/name%s'%(ext), 'wb+')
for chunk in f.chunks():
destination.write(chunk)
destination.close()
https://docs.djangoproject.com/en/dev/topics/http/file-uploads/#file-uploads https://docs.djangoproject.com/en/dev/ref/forms/fields/#filefield https: //docs.djangoproject.com/en/dev/ref/files/file/#django.core.files.File