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https://issues.apache.org/jira/browse/NUTCH-2141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14959345#comment-14959345
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Michael Joyce commented on NUTCH-2141:
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This was actually brought up in NUTCH-2108. There's also an [example handler | 
https://github.com/apache/nutch/blob/trunk/src/plugin/protocol-interactiveselenium/src/java/org/apache/nutch/protocol/interactiveselenium/handlers/DefalultMultiInteractionHandler.java]
 that was added to illustrate that as well. The handler wont actually be run 
multiple times so if you need to return concatenated content you need to do it 
in the handler and make sure it's returned appropriately.

> Change the InteractiveSelenium plugin handler Interface to return page content
> ------------------------------------------------------------------------------
>
>                 Key: NUTCH-2141
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2141
>             Project: Nutch
>          Issue Type: Improvement
>          Components: plugin
>            Reporter: Balaji Gurumurthy
>              Labels: selenium
>
> The handler interface in the protocol-interactiveselenium plugin currently 
> provide methods to manipulate the page content and the HTTPResponse class 
> read's the page content from the driver. This limits the amount of HTML 
> content that could be returned to nutch.
> The processDriver method could return a String object instead. This is 
> particularly helpful  in cases such as handling pagination when multiple 
> pages' content can be appended and returned from the handler. 



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