0002-00000503

Problem description

The request is missing a valid date header for signature authentication.

Causes

The request header is missing a valid x-oss-date header or Date header.

Example problem

The request includes a signature in the Authorization header but is missing the Date or x-oss-date header.

GET /oss.jpg HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Authorization:OSS LTAI****************:UNQD*************************

Solutions

Use one of the following methods to add a valid date header for signature authentication to the request:

• Add the Date field to the request.

  GET /oss.jpg HTTP/1.1
  Host: oss-example.oss-cn-hangzhou.aliyuncs.com
  Authorization:OSS LTAI****************:UNQD*************************
  Date: Tue, 20 Dec 2022 08:48:18 GMT

• Add the x-oss-date header to the request.

  GET /oss.jpg HTTP/1.1
  Host: oss-example.oss-cn-hangzhou.aliyuncs.com
  Authorization:OSS LTAI****************:UNQD*************************
  x-oss-date: 20221220T084818Z

References

• If you want to implement the V4 signature yourself, see Implement V4 signatures using the Python SDK.

• If you want to implement the V1 signature logic yourself, see Overview.