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From "Erik Hatcher (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3161) Use of 'qt' should be restricted to searching and should not start with a '/'
Date Fri, 24 Feb 2012 20:45:54 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215889#comment-13215889
] 

Erik Hatcher commented on SOLR-3161:
------------------------------------

bq. Well that's a total reversal of opinion Erik (being the one behind SOLR-1233), and I'm
glad!

Not quite a reversal - but rather a cleaning up.  If we're going to support qt, then it should
support _any_ request handler, IMO.  But qt is 1) not an intuitive name at all, and 2) silly
given that we should use paths instead for so many reasons.

bq. why don't we rename this thing to "requestHandler" while we're at it?

I'd be ok with just "rh"  

bq. PingRequestHandler and firstSearcher/newSearcher

I see the argument for an internal only "rh" parameter, but still seems it shouldn't be necessary
to even have that, such that we could dispatch to a request handler internally directly without
having to specify qt/rh/requestHandler as a query parameter.  How we do that, I'm not sure
yet though.


                
> Use of 'qt' should be restricted to searching and should not start with a '/'
> -----------------------------------------------------------------------------
>
>                 Key: SOLR-3161
>                 URL: https://issues.apache.org/jira/browse/SOLR-3161
>             Project: Solr
>          Issue Type: Improvement
>          Components: search, web gui
>            Reporter: David Smiley
>            Assignee: David Smiley
>             Fix For: 3.6, 4.0
>
>
> I haven't yet looked at the code involved for suggestions here; I'm speaking based on
how I think things should work and not work, based on intuitiveness and security. In general
I feel it is best practice to use '/' leading request handler names and not use "qt", but
I don't hate it enough when used in limited (search-only) circumstances to propose its demise.
But if someone proposes its deprecation that then I am +1 for that.
> Here is my proposal:
> Solr should error if the parameter "qt" is supplied with a leading '/'. (trunk only)
> Solr should only honor "qt" if the target request handler extends solr.SearchHandler.
> The new admin UI should only use 'qt' when it has to. For the query screen, it could
present a little pop-up menu of handlers to choose from, including "/select?qt=mycustom" for
handlers that aren't named with a leading '/'. This choice should be positioned at the top.
> And before I forget, me or someone should investigate if there are any similar security
problems with the shards.qt parameter. Perhaps shards.qt can abide by the same rules outlined
above.
> Does anyone foresee any problems with this proposal?
> On a related subject, I think the notion of a default request handler is bad - the default="true"
thing. Honestly I'm not sure what it does, since I noticed Solr trunk redirects '/solr/' to
the new admin UI at '/solr/#/'. Assuming it doesn't do anything useful anymore, I think it
would be clearer to use <requestHandler name="/select" class="solr.SearchHandler"> instead
of what's there now. The delta is to put the leading '/' on this request handler name, and
remove the "default" attribute.

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