Django:验证上传文件的文件类型 [英] Django: Validate file type of uploaded file
本文介绍了Django:验证上传文件的文件类型的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个应用程序可以让人上传文件,表示为 UploadedFiles
。但是,我想确保用户只上传xml文件。我知道我可以使用 magic
这样做,但是我不知道把这个支票放在哪里 - 我不能把它放在 clean
函数,因为当 clean
运行时,文件尚未上传,据我所知。
I have an app that lets people upload files, represented as UploadedFiles
. However, I want to make sure that users only upload xml files. I know I can do this using magic
, but I don't know where to put this check - I can't put it in the clean
function since the file is not yet uploaded when clean
runs, as far as I can tell.
这是$ code> UploadedFile 模型:
Here's the UploadedFile
model:
class UploadedFile(models.Model):
"""This represents a file that has been uploaded to the server."""
STATE_UPLOADED = 0
STATE_ANNOTATED = 1
STATE_PROCESSING = 2
STATE_PROCESSED = 4
STATES = (
(STATE_UPLOADED, "Uploaded"),
(STATE_ANNOTATED, "Annotated"),
(STATE_PROCESSING, "Processing"),
(STATE_PROCESSED, "Processed"),
)
status = models.SmallIntegerField(choices=STATES,
default=0, blank=True, null=True)
file = models.FileField(upload_to=settings.XML_ROOT)
project = models.ForeignKey(Project)
def __unicode__(self):
return self.file.name
def name(self):
return os.path.basename(self.file.name)
def save(self, *args, **kwargs):
if not self.status:
self.status = self.STATE_UPLOADED
super(UploadedFile, self).save(*args, **kwargs)
def delete(self, *args, **kwargs):
os.remove(self.file.path)
self.file.delete(False)
super(UploadedFile, self).delete(*args, **kwargs)
def get_absolute_url(self):
return u'/upload/projects/%d' % self.id
def clean(self):
if not "XML" in magic.from_file(self.file.url):
raise ValidationError(u'Not an xml file.')
class UploadedFileForm(forms.ModelForm):
class Meta:
model = UploadedFile
exclude = ('project',)
推荐答案
对于后代:解决方案是使用读取
方法,并将其传递给 magic.from_buffer
。
For posterity: the solution is to use the read
method and pass that to magic.from_buffer
.
class UploadedFileForm(ModelForm):
def clean_file(self):
file = self.cleaned_data.get("file", False)
filetype = magic.from_buffer(file.read())
if not "XML" in filetype:
raise ValidationError("File is not XML.")
return file
class Meta:
model = models.UploadedFile
exclude = ('project',)
这篇关于Django:验证上传文件的文件类型的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文