0005-00000410

问题描述

客户端加密场景下InitiateMultipartUpload、UploadPart根据请求头计算出的分片数量超出限制。

问题原因

客户端加密场景下，在InitiateMultipartUpload、UploadPart时，预估分片数目为请求头x-oss-meta-client-side-encryption-data-size的值与请求头x-oss-meta-client-side-encryption-part-size的值的比值，预估分片数目不能超过10000。

问题示例

例如您发起了一个InitiateMultipartUpload请求：

POST /multipart.data?uploads HTTP/1.1 
Host: oss-example.oss-cn-hangzhou.aliyuncs.com 
Date: Wed, 22 Feb 2012 08:32:21 GMT 
x-oss-storage-class: Archive
Authorization: OSS qn6qrrqxo2oawuk53otfjbyc:/cluRFtRwMTZpC2hTj4F67AG****
x-oss-meta-client-side-encryption-key: val0
x-oss-meta-client-side-encryption-start: val1
x-oss-meta-client-side-encryption-cek-alg: val2
x-oss-meta-client-side-encryption-wrap-alg: rsa
x-oss-meta-client-side-encryption-magic-number-hmac: val4
x-oss-meta-client-side-encryption-data-size: 200000
x-oss-meta-client-side-encryption-part-size: 10

预估分片数目为200000/10 = 20000，超过了10000个分片的限制，请求返回失败。

解决方案

客户端加密场景下，进行InitiateMultipartUpload、UploadPart时，请求头x-oss-meta-client-side-encryption-data-size值与请求头x-oss-meta-client-side-encryption-part-size值的比值不能超过10000。

相关文档

• 客户端加密

• InitiateMultipartUpload

• UploadPart