Django: Validate file type of uploaded file

Question

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 u

Answer 1

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',)