[jira] Commented: (NUTCH-25) needs 'character encoding' detector

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[jira] Commented: (NUTCH-25) needs 'character encoding' detector

Sebastian Nagel (Jira)

    [ https://issues.apache.org/jira/browse/NUTCH-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12531290 ]

Hudson commented on NUTCH-25:

Integrated in Nutch-Nightly #222 (See [http://lucene.zones.apache.org:8080/hudson/job/Nutch-Nightly/222/])

> needs 'character encoding' detector
> -----------------------------------
>                 Key: NUTCH-25
>                 URL: https://issues.apache.org/jira/browse/NUTCH-25
>             Project: Nutch
>          Issue Type: New Feature
>            Reporter: Stefan Groschupf
>            Assignee: Doğacan Güney
>             Fix For: 1.0.0
>         Attachments: EncodingDetector.java, EncodingDetector_additive.java, NUTCH-25.patch, NUTCH-25_draft.patch, NUTCH-25_v2.patch, NUTCH-25_v3.patch, NUTCH-25_v4.patch, patch
> transferred from:
> http://sourceforge.net/tracker/index.php?func=detail&aid=995730&group_id=59548&atid=491356
> submitted by:
> Jungshik Shin
> this is a follow-up to bug 993380 (figure out 'charset'
> from the meta tag).
> Although we can cover a lot of ground using the 'C-T'
> header field in in the HTTP header and the
> corresponding meta tag in html documents (and in case
> of XML, we have to use a similar but a different
> 'parsing'), in the wild, there are a lot of documents
> without any information about the character encoding
> used. Browsers like Mozilla and search engines like
> Google use character encoding detectors to deal with
> these 'unlabelled' documents.
> Mozilla's character encoding detector is GPL/MPL'd and
> we might be able to port it to Java. Unfortunately,
> it's not fool-proof. However, along with some other
> heuristic used by Mozilla and elsewhere, it'll be
> possible to achieve a high rate of the detection.
> The following page has links to some other related pages.
> http://trainedmonkey.com/week/2004/26
> In addition to the character encoding detection, we
> also need to detect the language of a document, which
> is even harder and should be a separate bug (although
> it's related).

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