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https://issues.apache.org/jira/browse/HDDS-820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16683856#comment-16683856
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Elek, Marton commented on HDDS-820:
-----------------------------------
Rebased to get the jenkins fix.
> Use more strict data format for the Last-Modified headers of s3 gateway
> -----------------------------------------------------------------------
>
> Key: HDDS-820
> URL: https://issues.apache.org/jira/browse/HDDS-820
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: S3
> Reporter: Elek, Marton
> Assignee: Elek, Marton
> Priority: Major
> Fix For: 0.4.0
>
> Attachments: HDDS-820.001.patch, HDDS-820.002.patch,
> HDDS-820.003.patch
>
>
> The format of HTTP Last-Modified header is defined by rfc-1123 (which updates
> the earlier rfc-822)
> From https://tools.ietf.org/html/rfc1123
> {code}
> 5.2.14 RFC-822 Date and Time Specification: RFC-822 Section 5
> The syntax for the date is hereby changed to:
> date = 1*2DIGIT month 2*4DIGIT
> {code}
> From https://tools.ietf.org/html/rfc822
> {code}
> 2.4. *RULE: REPETITION
>
> The character "*" preceding an element indicates repetition.
> The full form is:
>
> <l>*<m>element
>
> indicating at least <l> and at most <m> occurrences of element.
> Default values are 0 and infinity so that "*(element)" allows any
> number, including zero; "1*element" requires at least one; and
> "1*2element" allows one or two.
> {code}
> It means that both of the following dates are good:
> * Wed, 07 Nov 2018 10:31:05 GMT (two digits day)
> * Wed, 7 Nov 2018 10:31:05 GMT (one digits day)
> Java implements it in the right way in DateTimeFormatter.RFC_1123_DATE_TIME,
> it sets the minimum and maximum size of the day field (1-2)
> Golang follows a different way to define the date format, there is a fixed
> date which should be used as an example format which will be followed.
> http.TimeFormat (in golang) defines the format of the HTTP date:
> From https://golang.org/src/time/format.go
> {code}
> RFC1123 = "Mon, 02 Jan 2006 15:04:05 MST"
> {code}
> Base on this definition the day also should be two digits.
> *Summary*: As rfc1123 allows the usage of both format I propose two use the
> two digit days all the time, to make it possible to use the s3g from golang.
> Note: this is required as the CTrox/csi-s3 driver uses the golang base minio
> s3 client to create/get/list buckets before mounting it with fuse drivers.
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