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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-2690) Configurable and fast URL filter
Date Mon, 06 May 2019 15:55:01 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833943#comment-16833943
] 

Hudson commented on NUTCH-2690:
-------------------------------

FAILURE: Integrated in Jenkins build Nutch-trunk #3623 (See [https://builds.apache.org/job/Nutch-trunk/3623/])
NUTCH-2690 Configurable and fast URL filter - performs fast exact (sebastian: [https://github.com/apache/nutch/commit/1fc98bf061aedb98be4453865201ce6d9f1dede6])
* (edit) src/plugin/urlfilter-regex/sample/Benchmarks.urls
* (add) src/plugin/urlfilter-fast/README.md
* (add) src/plugin/urlfilter-fast/src/test/org/apache/nutch/urlfilter/fast/TestFastURLFilter.java
* (add) src/plugin/urlfilter-fast/ivy.xml
* (edit) src/plugin/lib-regex-filter/src/test/org/apache/nutch/urlfilter/api/RegexURLFilterBaseTest.java
* (add) src/plugin/urlfilter-fast/sample/Benchmarks.urls
* (edit) src/plugin/build.xml
* (edit) build.xml
* (edit) default.properties
* (add) src/plugin/urlfilter-fast/sample/fast-urlfilter-test.txt
* (edit) src/plugin/urlfilter-automaton/sample/Benchmarks.urls
* (add) src/plugin/urlfilter-fast/src/java/org/apache/nutch/urlfilter/fast/package-info.java
* (edit) conf/nutch-default.xml
* (add) src/plugin/urlfilter-fast/plugin.xml
* (add) conf/fast-urlfilter.txt.template
* (add) src/plugin/urlfilter-fast/sample/test.urls
* (add) src/plugin/urlfilter-fast/src/java/org/apache/nutch/urlfilter/fast/FastURLFilter.java
* (add) src/plugin/urlfilter-fast/build.xml
* (add) src/plugin/urlfilter-fast/sample/fast-urlfilter-benchmark.txt


> Configurable and fast URL filter
> --------------------------------
>
>                 Key: NUTCH-2690
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2690
>             Project: Nutch
>          Issue Type: Improvement
>          Components: plugin
>            Reporter: Sebastian Nagel
>            Assignee: Sebastian Nagel
>            Priority: Minor
>             Fix For: 1.16
>
>
> This improvement introduces a new URL filter plugin "urlfilter-fast" (naming debatable)
which is in use at Common Crawl [since 2013|https://github.com/commoncrawl/nutch/commit/968e0d8f292bed46e4e3eb276cb475f4403ea9bd]
to apply a long list of filters. 
> # an exact (suffix) match against the host name is done to retrieve host/domain-specific
regex rules
> # applies a regular expression against the path (and query) component of the URL
> What makes it faster than urlfilter-regex for common cases:
> - regexes are selected by host name or it's domain suffix, so there are usually fewer
rules to be checked. That's similar to NUTCH-1838 but any domain suffix can be matched including
{{subdomain.domain.com}}, {{com}} or {{.}} for global rules. The selection by host name suffix
is considerably fast.
> - regexes are applied only to the path component (optionally including the query) and
not the entire URL.
>   Matching against a shorter string can make a huge difference for more complex regular
expressions.
> - the rule to deny everything from a host or domain gets special treatment to be fast
> More details about the rule format are found in the plugin's [README|https://github.com/commoncrawl/nutch/blob/cc-fast-url-filter/src/plugin/urlfilter-fast/README.md].



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