python post上传大文件分片上传_基于七牛 用python实现分片上传 创建文件报错701...

创建文件时出错：

701

Unknown

{"error":"block 0: yonginvalid context"}

抓包结果：

POST /mkfile/95542/yihu.jpg HTTP/1.1

Accept-Encoding: identity

Host:

Content-type: text/plain

Content-Length: 392

Authorization: UpToken 0th91twqvQT3Qv1qddQ3RtQxIG1dc7Nh4YGNZIhV:KsPXAUO0Q5ZLKuG12gSKTNz-B2c=:eyJzY29wZSI6ImpkZmlsZSIsImRlYWRsaW5lIjoxNDUxNDkxMjAwfQ==

ctxlist=%5B%27qiAZl45QWVaFgVj4mDqySgHTZXdV1U7bE6muNG8o4ORgoan3YBx7DkVZI7-QJUZCJTlFJTNFJTA3JUY4JTgzJUZFLSU4RiVDNCUwMSVERiVGRS0lM0YlRkMlMjElREYlRjYlMjMlRDclQThoJQAAAAAAyAAAAAAAAADIAAAAyAAAZXc0QUFKSmdSMVZQbmlnQQ%3D%3D%27%2C+%27TJ9HJLMMcPLIEJEjQwLBvAHrPHFu1U7bE7KGACsvCpVkrqqNqDirDWtlznClMyVGNSVDRCUxRlUlN0QlREYlRTElRkVnQSVEMEM3JUY5JUZGJTAwJTNGJUU3JUVCJTlBJTNDJUUxJUVEJUY5JQAAAAAAyAAAAAAAAADIAAAAyAAAN2d3QUFHZGdSMVhSemlnQQ%3D%3D%27%5D

求大神解答，自己写的SDK，因为毕业设计要求。