django filefield/imagefield 如何获取到上传文件的原始路径

[mykoss]

在django中，想把图片上传到阿里云oss,阿里云的api接口中需要上传文件的原始路径，我获取不到，求大神帮忙

model定义：

class Image(models.Model):
    summary = models.CharField(verbose_name=u'摘要', max_length=200)
    path = models.ImageField(verbose_name=u'图片路径', upload_to='media/upload_images', storage=MediaStorage())
    time = models.DateTimeField(auto_now_add=True)

    class Meta:
        verbose_name = u'图片'
        verbose_name_plural = u'图片'

    def __unicode__(self):
        return u'图片'

class MediaStorage(FileSystemStorage):
    from django.conf import settings

    def __init__(self, location=settings.MEDIA_ROOT, base_url=settings.MEDIA_URL):
        # 初始化
        super(MediaStorage, self).__init__(location, base_url)

    # 重写 _save方法
    def _save(self, name, content):
        ext = os.path.splitext(name)[1]
        d = os.path.dirname(name)
        fn = uuid.uuid1()
        newname = os.path.join(d,str(fn) + ext)
        #阿里云上传接口
        oss2.resumable_upload(bucket, newname, "上传文件的原始路径")
        # return super(MediaStorage, self)._save(newname, content)

[riding]

写你在服务器上保存的文件的路径，什么原始路径，对阿里云来说，你的服务器就是原始！