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有没有办法可以生成预签名URL而没有任何到期日期？我正在开发一个电子邮件应用程序,我的附件将保存在S3中.另请告诉我通过JavaScript SDK下载附件的最佳方式是什么.

我正在使用下面的代码

var params = {Bucket: 'bucket', Key: 'key', Expires: 60};
var url = s3.getSignedUrl('getObject', params);
console.log('The URL is', url);

我试图使用Boto3将文件上传到s3并将上传的文件公开并将其作为网址返回.

class UtilResource(BaseZMPResource):
class Meta(BaseZMPResource.Meta):
    queryset = Configuration.objects.none()
    resource_name = 'util_resource'
    allowed_methods = ['get']

def post_list(self, request, **kwargs):

    fileToUpload = request.FILES
    # write code to upload to amazone s3
    # see: https://boto3.readthedocs.org/en/latest/reference/services/s3.html


    self.session = Session(aws_access_key_id=settings.AWS_KEY_ID,
                  aws_secret_access_key=settings.AWS_ACCESS_KEY,
                  region_name=settings.AWS_REGION)

    client = self.session.client('s3')
    client.upload_file('zango-static','fileToUpload')


    url = "some/test/url"
    return self.create_response(request, {
        'url': url // return's public url of uploaded file 
    })

我搜索了整个文档,我找不到任何链接,描述如何做到这一点,有人可以解释或提供任何资源,我可以找到灵魂？