无法在s3中获取存储桶的位置

Question

我发送以下请求

GET http://bucketname.s3.amazonaws.com/?location 
Host: bucketname.s3.amazonaws.com 
x-amz-date:  20170531T082529Z
Authorization: AWS

我收到以下错误

<?xml version="1.0" encoding="UTF-8"?>
<Error>
    <Code>NoSuchKey</Code>
    <Message>The specified key does not exist.</Message>
    <Key>?location</Key>
    <RequestId>7E63980AAE</RequestId>
    <HostId>HostID</HostId>
</Error>

似乎它试图通过？位置名称来获取对象。但根据Amazon API页面http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGETlocation.html 它应该返回桶的位置