scoring crossposts

scoring crossposts

[Dale Henderson]

I'm trying to score crossposts down. I found this piece of code:

  ("xref"
   ;; the more cross posting, the exponentially worse the article
   ("^xref: \\S-+ \\S-+ \\S-+ \\S-+" -1 nil r)
   ("^xref: \\S-+ \\S-+ \\S-+ \\S-+ \\S-+" -2 nil r)
   ("^xref: \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+" -4 nil r)
   ("^xref: \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+" -8 nil r)
   ("^xref: \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+ \\S-+" -16 nil r)
   ...)

Then I noticed a massively crossposted article that wasn't
scored. When I investigated the headers, I noticed there was no Xref
header. 

So I was wondering could I score on the newsgroups header. According
to the documentation Newsgroups isn't a valid header to score on.


On another note, is there any way to check a header to see how many
times a particular regex matches and use the count to set the score. 
That is in the example above see how many times the regex \\S-+
matches the xref header and then set the score to 

(- (expt 2 (- count 3)))

Re: scoring crossposts

[Karl Kleinpaste]

Dale Henderson <nilram@hotpop.com> writes:
> So I was wondering could I score on the newsgroups header. According
> to the documentation Newsgroups isn't a valid header to score on.

If your server runs INN, you can ask your newsadmin to add
"Newsgroups:full" to the control file "overview.fmt".  If that
happens, then all future arriving articles will get Newsgroups data
into overview, and you can score on Newsgroups as an "extra" header.

This will make overviews somewhat larger on the server, and so your
newsadmin might not be willing, but at least you can ask.  That said,
the increase in size from Newsgroups' presence in overviews is not at
all large in the usual case, and is really totally eclipsed by e.g.
References chains that always already appear in overviews.

"Extra" scoring is referenced at the end of info://Gnus/To+From+Newsgroups
as regards gnus-extra-headers, whose default value is '(To Newsgroups).

(I also recommend "Keywords:full" and "NNTP-Posting-Host:full" in
overview.fmt.)