Regular Expression for RegexUrlNormalizer to remove jsessionid
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Key: NUTCH-255
URL: http://issues.apache.org/jira/browse/NUTCH-255
Project: Nutch
Type: Improvement
Components: fetcher
Versions: 0.8-dev
Environment: Windows XP Media Center 2005, 2 Gigs RAM, 3.0 Ghz Pentium 4
Hyperthreaded, Eclipse 3.2.0
Reporter: Dennis Kubes
Priority: Trivial
Attachments: urlnormalize_jessionid.patch
Some URLs are filtered out by the crawl url filter for special characters (by
default). One of these is the jsessionid urls such as:
http://www.somesite.com;jsessionid=A8D7D812B5EFD3099F099A760F779E3B?query=string
We want to get rid of the jessionid and keep everything else so that it looks
like this:
http://www.somesite.com?query=string
Below is a regular expression for the regex-normalize.xml file used by the
RegexUrlNormalizer that sucessfully removes jsessionid strings while leaving
the hostname and querystring. I have also attached a patch for the
regex-normalize.xml.template file that adds the following expression.
<regex>
<pattern>(.*)(;jsessionid=[a-zA-Z0-9]{32})(.*)</pattern>
<substitution>$1$3</substitution>
</regex>
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