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https://issues.apache.org/jira/browse/COUCHDB-855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995512#comment-12995512
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Filipe Manana commented on COUCHDB-855:
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Good call Paul. I'm not familiar at all either with the application
environment, so yes there's always a risk of not using it well or ending up not
being reliable enough for this use case. I also think preferable to let the
other processes do all the matching and url processing, just keeping the most
expensive things in the gen_server, so that the gen_server call does no
processing at all (or very very little).
> 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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