Django (音频)文件验证
Django (音频)文件验证
提问于 2011-06-01 08:04:33
我正在尝试一个允许用户上传音频文件的网站。我已经阅读了我能接触到的所有文档，但找不到太多关于验证文件的信息。
Total newb这里(以前从未做过任何类型的文件验证)，并试图弄清楚这一点。谁能握着我的手，告诉我我需要知道的事情？
一如既往地，提前感谢您。
回答 1
Stack Overflow用户
回答已采纳
发布于 2011-06-01 10:42:31
您希望在将文件写入磁盘之前对其进行验证。当您上传一个文件时，表单会经过验证，然后上传的文件会被传递给一个处理程序/方法，该处理程序/方法处理对服务器上磁盘的实际写入。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
您可以：
- 检查文件是否小于特定大小(良好做法)
- 然后检查提交的文件是否具有特定的内容类型(即音频文件)
- 这是非常无用的，因为有人可以很容易地欺骗
- ，然后检查文件是否以某个(或多个)扩展名结尾，这也是非常无用的
- 尝试读取该文件，看看它是否真的是音频
(我还没有测试过这段代码)
models.py
class UserSong(models.Model):
title = models.CharField(max_length=100)
audio_file = models.FileField()forms.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")从utils导入handle_uploaded_file的views.py
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})utils.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
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原文链接：
https://stackoverflow.com/questions/6194901
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