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From "Paul Joseph Davis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-855) New host manager
Date Wed, 16 Feb 2011 20:46:24 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995507#comment-12995507
] 

Paul Joseph Davis commented on COUCHDB-855:
-------------------------------------------

Just a note that I prefer the gen server just store the parsed stuff and just gives that to
other processes to do the actual matching. It'd also react to config changes to re-populate
the parsed state on configuration change. Using the application environment seemed like it
could lead to weirdness that we aren't anticipating. Although that could be because I'm just
not familiar enough with the app env, but that's exactly why I'm hesitant to rely on it.

> New host manager
> ----------------
>
>                 Key: COUCHDB-855
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-855
>             Project: CouchDB
>          Issue Type: Improvement
>    Affects Versions: 1.1
>            Reporter: Benoit Chesneau
>            Assignee: Benoit Chesneau
>            Priority: Blocker
>             Fix For: 1.1
>
>         Attachments: 0001-New-vhost-manager.-allows-dynamic-add-of-vhosts-with.patch,
0001-Squashed-commit-of-the-following.patch, COUCHDB-855-1.patch, COUCHDB-855-2.patch
>
>
> New vhost manager. allows dynamic add of vhosts without restart, wildcard in vhost and
specific functions in erlang by kind of domain. It also fix issue in etap test (160) .
> Find attached to this ticket the patch. It is also available in my github repo :
> http://github.com/benoitc/couchdb/commit/435c756cc6e687886cc7055302963f422cf0e161
> more details :
> This gen_server keep state of vhosts added to the ini and try to
> match the Host header (or forwarded) against rules built against
> vhost list. 
> Declaration of vhosts take place in the configuration file :
> [vhosts]
> example.com = /example
> *.example.com = /example
> The first line will rewrite the rquest to display the content of the
> example database. This rule works only if the Host header is
> 'example.com' and won't work for CNAMEs. Second rule on the other hand
> match all CNAMES to example db. So www.example.com or db.example.com
> will work.
> The wildcard ('*') should always be the last in the cnames:
>      "*.db.example.com = /"  will match all cname on top of db
> examples to the root of the machine. (for now no rewriting is
> possible).
> By default vhosts redirection is handle by the function
> couch_httpd_vhost:redirect_to_vhost, but you could pass per vhost a
> specific function :
>      "*.domain.com" = {Module, Func}"
> The function take the Mochiweb Request object and should return a new
> Mochiweb Request object.
> You could also change the default function to handle request by
> changing the setting `redirect_vhost_handler` in `httpd` section of
> the Ini:
>       [httpd]
>       redirect_vhost_handler = {Module, Fun}
> The function take 2 args : the mochiweb request object and the target
> path. 

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