Date: Tue, 06 Aug 2013 23:55:05 +0200
From: Anders Larsen <al@alarsen.net>
Subject: Re: kernel mailing list permalinks
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>, Shuah Khan <shuahkhan@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        postmaster@vger.kernel.org
In-Reply-To: <52016958.70005@zytor.com> (from hpa@zytor.com on Tue Aug  6
	23:23:36 2013)
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On 2013-08-06 23:23, H. Peter Anvin wrote:
> On 08/06/2013 02:11 PM, Bjorn Helgaas wrote:
> >>
> >> The above link is also a good example of subtleness: + in a URL  
> means a
> >> space character, it has to be escaped as %2B.  Particularly a  
> problem in
> >> gmail message-ids.

the link in question works just fine without escaping the +; the + only
has to be escaped in then query component of a URL, not in the path
component where it is just another valid character - and the link in
question did not contain any query component.

(see RFC 3986 sections 3.3 and 3.4)

> A quoted Message-ID might be weird as heck, but one rarely if ever see
> them, I don't know if they are even legal.

I don't think they are even possible, as the percent-sign is just  
another
valid character in a Message-ID - but so is the '+' sign, so it seems
you're trying to solve a non-existent problem...

(see RFC 5322 section 3.2.3)

Cheers
Anders
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