[jira] [Resolved] (NUTCH-2563) HTTP header spellchecking issues

["Sebastian Nagel (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUTCH-2563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sebastian Nagel resolved NUTCH-2563.
------------------------------------
    Resolution: Fixed

> HTTP header spellchecking issues
> --------------------------------
>
>                 Key: NUTCH-2563
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2563
>             Project: Nutch
>          Issue Type: Sub-task
>    Affects Versions: 1.14
>            Reporter: Gerard Bouchar
>            Priority: Major
>             Fix For: 1.15
>
>
> {color:#333333}When reading http headers, for each header, the SpellCheckedMetadata class computes a Levenshtein distance between it and every  known header in the HttpHeaders interface. Not only is that slow, non-standard, and non-conform to browsers' behavior, but it also causes bugs and prevents us from accessing the real headers sent by the HTTP server.{color}
>  * {color:#333333}Example: [http://www.taz.de/!443358/] . The server sends a *Client-Transfer-Encoding: chunked* header, but SpellCheckedMetadata corrects it to *Transfer-Encoding: chunked*. Then, HttpResponse (in protocol-http) tries to read the HTTP body as chunked, whereas it is not.{color}
> {color:#333333}I personally think that HTTP header spell checking is a bad idea, and that this logic should be completely removed. But if it were to be kept, the threshold (SpellCheckedMetadata.TRESHOLD_DIVIDER) should be higher (we internally set it to 5 as a temporary fix for this issue){color}



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