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https://issues.apache.org/jira/browse/SOLR-4470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13783159#comment-13783159
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Tim Vaillancourt commented on SOLR-4470:
----------------------------------------

This thread seems to be going nowhere fast - perhaps too much is trying to be 
tackled here at once.

I've created a smaller request JIRA for the setting of *ANY* arbitrary HTTP 
header on sub-requests. A user wanting to achieve basic-auth on subrequests 
(this request comes up all the time) could just set a static "Authorization" 
header, or any HTTP header for that matter.

This approach should be a happy medium because it is not "security-related" 
(not committing Solr to security), and can be used much more generically in 
several other use cases (Host header, etc).

https://issues.apache.org/jira/browse/SOLR-5293 ("Allow setting of HTTP headers 
on SolrCloud subrequests").

Ideas/thoughts appreciated!

> Support for basic http auth in internal solr requests
> -----------------------------------------------------
>
>                 Key: SOLR-4470
>                 URL: https://issues.apache.org/jira/browse/SOLR-4470
>             Project: Solr
>          Issue Type: New Feature
>          Components: clients - java, multicore, replication (java), SolrCloud
>    Affects Versions: 4.0
>            Reporter: Per Steffensen
>            Assignee: Jan Høydahl
>              Labels: authentication, https, solrclient, solrcloud, ssl
>             Fix For: 4.5, 5.0
>
>         Attachments: SOLR-4470_branch_4x_r1452629.patch, 
> SOLR-4470_branch_4x_r1452629.patch, SOLR-4470_branch_4x_r1454444.patch, 
> SOLR-4470.patch, SOLR-4470.patch
>
>
> We want to protect any HTTP-resource (url). We want to require credentials no 
> matter what kind of HTTP-request you make to a Solr-node.
> It can faily easy be acheived as described on 
> http://wiki.apache.org/solr/SolrSecurity. This problem is that Solr-nodes 
> also make "internal" request to other Solr-nodes, and for it to work 
> credentials need to be provided here also.
> Ideally we would like to "forward" credentials from a particular request to 
> all the "internal" sub-requests it triggers. E.g. for search and update 
> request.
> But there are also "internal" requests
> * that only indirectly/asynchronously triggered from "outside" requests (e.g. 
> shard creation/deletion/etc based on calls to the "Collection API")
> * that do not in any way have relation to an "outside" "super"-request (e.g. 
> replica synching stuff)
> We would like to aim at a solution where "original" credentials are 
> "forwarded" when a request directly/synchronously trigger a subrequest, and 
> fallback to a configured "internal credentials" for the 
> asynchronous/non-rooted requests.
> In our solution we would aim at only supporting basic http auth, but we would 
> like to make a "framework" around it, so that not to much refactoring is 
> needed if you later want to make support for other kinds of auth (e.g. digest)
> We will work at a solution but create this JIRA issue early in order to get 
> input/comments from the community as early as possible.



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