Django：验证上传文件的文件类型

对于后代：解决方案是使用read方法并将其传递给

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',)