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https://issues.apache.org/jira/browse/SOLR-578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597868#action_12597868
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Noble Paul commented on SOLR-578:
---------------------------------

The BinaryQueryResponseWriter is the interface you must implement and the 'out' 
parameter is an instance of  ServletOutputStream. Using that you can send out 
any binary data (even a lucene segment).  

The implementation code  is as follows in SolrDispatchFilter
{code}
 if (responseWriter instanceof BinaryQueryResponseWriter) {
     BinaryQueryResponseWriter binWriter = (BinaryQueryResponseWriter) 
responseWriter;
      binWriter.write(response.getOutputStream(), solrReq, solrRsp);
 }
{code}

Is there any specific reason why you must have access to the 
HttpServletResponse  object ?

> Binary stream response for request
> ----------------------------------
>
>                 Key: SOLR-578
>                 URL: https://issues.apache.org/jira/browse/SOLR-578
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 1.3
>            Reporter: Jason Rutherglen
>
> Allow sending binary response back from request.  This is not the same as 
> encoding in binary such as BinaryQueryResponseWriter.  Simply need access to 
> servlet response stream for sending something like a Lucene segment.  

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