Experimental Physics and
Industrial Control System

John Hammonds <[email protected]> · Wed, 28 Jul 2010 14:00:21 -0500

 Andrew,
Can't remember where I saw this but one list replaced added an
additional layer to the typical replacement of _at_ with

_at_SOMEOTHERTEXT_ to further confuse crawlers. The need to remove the
extra text was then explained on the web page.
John
On 7/28/2010 12:24 PM, Andrew Johnson wrote:

Hi Angus,
On Tuesday 27 July 2010 23:18:49 Angus Gratton wrote:

When I looked in the /robots.txt file I saw that tech-talk is explicitly
excluded from crawler indexing:
Disallow: /epics/core-talk
Disallow: /epics/mantis
Disallow: /epics/tech-talk
Disallow: /epics/wiki
I'm wondering why this is, and if it can possibly be undone?

It dates back to the days when spam filters were much less effective than they
are nowadays; I was trying to be kind to the users of tech-talk by keeping
their email addresses from being scraped off the website.  I admit an email
harvester might ignore the robots.txt file if they are doing their own
crawling, but at least this prevents them from finding addresses via regular
search engines.  Maybe this doesn't matter as much nowadays, would anyone like
to comment?
The Mhonarc software that I use to maintain the archive generates mailto: URLs
in its HTML output wherever it sees an email address in the message header or
body.  Elsewhere on the EPICS site I replace the '@' sign a mailto: URLs with
'_at_' and I've worked out how to get Mhonarc to do that too, but it doesn't
provide an obvious way to rewrite the message text that the URL decorates,
which will still contain the complete email address.  Hopefully just changing
the mailto: is sufficient to deter the spammers, or this is not necessary any
more.
I have reprocessed all the tech-talk and core-talk archive files to rewrite
the mailto: URLs as described above; if there are no complaints I will open up
the tech-talk and core-talk archives to the web crawlers in a day or two.
Mantis has been replaced by the bug tracker at Launchpad.net; I'm trying to
get the Wiki replaced with a newer version that I don't have to manage, so
that is likely to move at some point and I'd rather not have Google hit it
until then.
HTH,
- Andrew

--
John Hammonds
Software Services Group
APS Engineering Support Division
Argonne National Laboratory
[email protected]<mailto:[email protected]>
(630)252-5317

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System