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net/mail: missing date layout #22661

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wxdao opened this issue Nov 10, 2017 · 10 comments

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@wxdao
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commented Nov 10, 2017

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.9.1 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What did you do?

Playground:
https://play.golang.org/p/HRd4hDqXU2

Explanation:
In net/mail/message.go there is

zones := [...]string{"-0700", "MST", "-0700 (MST)"}

However, it leaves out the situation -0700 (GMT:-07:00).

So, rewriting that line to

zones := [...]string{"-0700", "MST", "-0700 (MST)", "-0700 (GMT:-07:00)"}

would fix this issue.

What did you expect to see?

It gets parsed successfully.

What did you see instead?

0001-01-01 00:00:00 +0000 UTC mail: header could not be parsed

@ianlancetaylor ianlancetaylor changed the title missing date layout in net/mail net/mail: missing date layout Nov 10, 2017
@ianlancetaylor ianlancetaylor added this to the Go1.11 milestone Nov 10, 2017
@ianlancetaylor

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commented Nov 10, 2017

Where did you see this date header?

From looking at RFC 5322 I suspect that the right fix is to remove "-0700 (MST)" from dateLayouts and to change ParseDate to skip CFWS at the end.

@wxdao

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commented Nov 11, 2017

@gopherbot

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commented Jun 9, 2018

Change https://golang.org/cl/117596 mentions this issue: net/mail: added support to trailing CFWS in date

@iWdGo

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commented Jun 9, 2018

RFC 5322 date format always finishes with a time zone. Checking the ending allows to discard the trailing CFWS as per standard.

@odeke-em

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commented Jun 22, 2018

As per @ianlancetaylor's comments in the review of CL 117596, that this change is more complicated than permissible this late in the cycle, we are moving this to Go1.12.

@odeke-em odeke-em modified the milestones: Go1.11, Go1.12 Jun 22, 2018
@bcmills bcmills modified the milestones: Go1.12, Go1.13 Jan 30, 2019
@andybons andybons modified the milestones: Go1.13, Go1.14 Jul 8, 2019
@benburwell

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commented Aug 2, 2019

Is there any progress on getting this CL applied? I suppose at this point it will be going into 1.14, but it looks like it missed both 1.12 and 1.13, so I'm not sure if anything needs to happen to make sure it goes into 1.14.

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commented Aug 2, 2019

Bother, we've clearly dropped the ball on this one. The best way would to ping the CL when we open the tree for 1.14. I'll try to do that myself but clearly I've failed to do so in the past.

@benburwell

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commented Aug 2, 2019

Thanks, I'll keep an eye out for that!

@rsc rsc modified the milestones: Go1.14, Backlog Oct 9, 2019
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commented Oct 10, 2019

@ianlancetaylor I see Constantin has uploaded a new patchset on the CL a few days ago; not familiar enough with the Go dev process to know if that is sufficient as a ping?

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commented Oct 10, 2019

Yes, thanks, it's still on my list, I've just been swamped. Thanks for checking.

@smasher164 smasher164 modified the milestones: Backlog, Go1.14 Oct 11, 2019
@gopherbot gopherbot closed this in a08cb9f Oct 11, 2019
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