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https://issues.apache.org/jira/browse/NUTCH-1998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Giuseppe Totaro updated NUTCH-1998:
-----------------------------------
    Attachment: NUTCH-1998.patch

[~Lukeliush], you can find in attachment the patch to add a user-defined 
extension to output documents. For example, you can use the 
CommonCrawlDataDumper as follows:
{noformat}
bin/nutch commoncrawldump -segment /path/to/data/segments -outputDir 
/path/to/output -SimpleDateFormat -epochFilename -jsonArray -reverseKey 
-extension cbor
{noformat}
The {{-extension}} command-line option allows to use the given file extension 
as extension of each output document. This patch does not include 
[NUTCH-1997|https://issues.apache.org/jira/browse/NUTCH-1997].
Thanks a lot for supporting me on this work.

> Add support for user-defined file extension to CommonCrawlDataDumper
> --------------------------------------------------------------------
>
>                 Key: NUTCH-1998
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1998
>             Project: Nutch
>          Issue Type: Improvement
>          Components: tool
>            Reporter: Giuseppe Totaro
>            Priority: Minor
>         Attachments: NUTCH-1998.patch
>
>
> {{CommonCrawlDataDumper}} tool is able to generate CBOR-encoded files, 
> extracted from Nutch crawled data, using the Common Crawl format. By default, 
> {{CommonCrawlDataDumper}} uses the original file extension.
> We are going to add support for a command-line option (e.g., {{-extension}}) 
> that allows the user to provide a file extension to use in place of the 
> original one.



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