Allow configuring cacheControl via s3fs.request.header.cache-control flag

[steve-todorov]

Task Description

We need to have a header cache control configuration flag to allow users more flexibility.

Use case

1. Initial upload of /my/path/object
2. File is changed and is re-uploaded to /my/path/object - cache causes the file update to be skipped.

Also some proxies might cache requests if Cache-Control header is not present.

Tasks

The following tasks will need to be carried out:

• Implement the solution (if necessary add configuration flags)

Task Relationships

This task:

• Is a sub-task of:
• Depends on:
• Is a follow-up of:
• Relates to:
  • Enable no-cache option when uploading a new object #688
  • Add documentation on what sort of caching there is and how it works #126

Useful Links

Help

• Our chat channel
• Points of contact:
  • @carlspring
  • @steve-todorov

[steve-todorov]

@szimon could you please have a look at this test case. I'm trying to reproduce your problem without luck. Could you please maybe write a test case that shows your cache problem or articulate steps to reproduce?

Are you, perhaps, using CloudFront in addition to your S3 bucket and maybe need to configure the Cache-Control metadata added to the uploaded file?

[steve-todorov]

@szimon ping? :)