aws s3设置跨域，s3配置预签名，aws 配置文件上传

1. 创建桶，然后点击桶名称

2. 点击权限

3. 存储桶策略配置：

    lucky-lbc-001 改为你自己的桶名称

    注： 我的策略有的都是* ， 生产一定要自己再调下相关策略，比如action不能为*，把删除得去掉。

{"Version": "2012-10-17","Statement": [{"Sid": "Deny a presigned URL request if the signature is more than 10 min old","Effect": "Deny","Principal": {"AWS": "*"},"Action": "s3:*","Resource": "arn:aws:s3:::lucky-lbc-001/*","Condition": {"NumericGreaterThan": {"s3:signatureAge": "600000"}}}]
}

4. 对象所有权，添加为acl控制。  点击编辑

5. 配置跨域, 可以本地测试使用

[{"AllowedHeaders": ["*"],"AllowedMethods": ["PUT","POST","DELETE"],"AllowedOrigins": ["*"],"ExposeHeaders": []}
]

注： 

     aws 得客服还需要收费，本文绝对为你省去了点服务费~~

参考文档：

https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/userguide/using-presigned-url.html

https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/userguide/UsingBucket.html