On Sat 20 Jul 2019 at 17:09:44 (-0500), Karlin High wrote:
> On 7/20/2019 3:48 PM, Bill via lilypond-user wrote:
> > I have been reading this list for a month now and whenever I click
> > on an attachment link I get a message not found.
> > 
> > Here is an example
> > 
> > https://lists.gnu.org/archive/html/lilypond-user/attachments/20190718/237e8abe/attachment.png
> > 
> 
> Here is an example of a post where the attachment works for me:
> <https://lists.gnu.org/archive/html/lilypond-user/2019-07/msg00184.html>
> I am on Windows 7 Pro 64-bit SP1 and Google Chrome 75.0.3770.100

It depends how you read the list. Reached by a browser, that link
displays the image after the message (for me), but a saved copy of the
page (or hovering over the image with the cursor) shows that the image
is actually being downloaded from a link:

  <a href="pngaidFgtkyly.png" ><img src="pngaidFgtkyly.png" alt="PNG image"></a>

or IOW, from 
https://lists.gnu.org/archive/html/lilypond-user/2019-07/pngaidFgtkyly.png

Now look at the same message as an individual post sent from the list,
and you can see that it's included as an attachment:

   If there is another simple solution I would be glad to know how to do
   it!

       Werner

   ----Next_Part(Thu_Jul_18_14_15_11_2019_901)--
   Content-Type: Image/Png
   Content-Transfer-Encoding: base64
   Content-Disposition: inline; filename="three-bars.png"

But now take a look at the *Digest* emails. If you get them sent as
large MIME attachments, then you're in the same position as
subscribers to the individual emails. However, if you get them sent
as smaller, text-only digests, you'll find the attachment is
"scrubbed", and there's a link for fetching it:

   If there is another simple solution I would be glad to know how to do
   it!


       Werner
   -------------- next part --------------
   A non-text attachment was scrubbed...
   Name: three-bars.png
   Type: image/png
   Size: 14774 bytes
   Desc: not available
   URL: 
<https://lists.gnu.org/archive/html/lilypond-user/attachments/20190718/237e8abe/attachment.png>

   ------------------------------

However, try to fetch it and ti will fail:

   $ wget 
https://lists.gnu.org/archive/html/lilypond-user/attachments/20190718/237e8abe/attachment.png
   --2019-07-20 19:07:51--
   
https://lists.gnu.org/archive/html/lilypond-user/attachments/20190718/237e8abe/attachment.png
   Resolving lists.gnu.org (lists.gnu.org)... 209.51.188.17, 2001:470:142::17
   Connecting to lists.gnu.org (lists.gnu.org)|209.51.188.17|:443... connected.
   HTTP request sent, awaiting response... 404 Not Found
   2019-07-20 19:07:52 ERROR 404: Not Found.

   $ 

> To diagnose this problem, more information will be needed.
> 
> What operating system are you using?
> What web browser?
> What archive website? Looks like lists.gnu.org, but there are others.
> What thread or message contains the non-working attachment link?

I reported this problem in March 2016, but no reply from the
powers that be.

Cheers,
David.
Date: Sat, 12 Mar 2016 12:33:46 -0600
From: David Wright <lily...@lionunicorn.co.uk>
To: webmast...@gnu.org
Subject: Broken link
Message-ID: <20160312183346.GA10360@alum>
User-Agent: Mutt/1.5.21 (2010-09-15)

Could you tell me why this link does not exist on your server?

http://lists.gnu.org/archive/html/lilypond-user/attachments/20160312/6eba7c13/attachment.png

I have taken this link from the following email which is a lilypond-user digest:

Message-ID: <mailman.18001.1457803851.840.lilypond-u...@gnu.org>

The first message in this digest has a "scrubbed" attachment.
An email version of this message received directly from the list would
have this attachment. The digest contains the link above in its place.
There is no obvious route by which the attachment is available.

Interestingly however, the attachment *is* available on your server
but at a different address. In this case it is:

http://lists.gnu.org/archive/html/lilypond-user/2016-03/pngHJxj6irVRF.png

Why is this address not given in the digest?

Cheers,
David.
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