Hi Markus, How (where in the process) do you like to use this normalizer. Isn't this functionality already covered by the URL normalizer(s)?
Mathijs Homminga On Mar 21, 2012, at 22:06, "Markus Jelsma (Created) (JIRA)" <[email protected]> wrote: > HostNormalizer > -------------- > > Key: NUTCH-1319 > URL: https://issues.apache.org/jira/browse/NUTCH-1319 > Project: Nutch > Issue Type: New Feature > Reporter: Markus Jelsma > Assignee: Markus Jelsma > Fix For: 1.5 > > > Nutch would benefit from having a host normalizer. A host normalizer maps a > given host to the desired host. A basic example is to map www.apache.org to > apache.org. The Apache website is one of many on the internet that has a > duplicate website on the same domain just because it allows both www and > non-www to return HTTP 200 and proper content. > > It is also able to handle wildcards such as *.example.org to example.org if > there are multiple sub domains that actually point to the same website. > > Large internet crawls tend to get polluted very quickly due to these > problems. It also leads to skewed scores in the webgraph as different > websites link to different versions of the same duplicate website. > > -- > This message is automatically generated by JIRA. > If you think it was sent incorrectly, please contact your JIRA > administrators: > https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa > For more information on JIRA, see: http://www.atlassian.com/software/jira > >
