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CMiksche / dbd-modules

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Alias fails with DBDocRoot #8

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Define an alias pointing to a directory outside the original Document Root
2. Call DBDocRoot to set the new Document Root.
3. Serving a file through the alias fails.

What version of the product are you using? On what operating system?

Windows 7 / Apache 2.2.21

Please provide any additional information below.

Original issue reported on code.google.com by ashishpa...@gmail.com on 11 Feb 2013 at 12:42

GoogleCodeExporter commented 9 years ago 
I will configure Apache 2.2 and attempt to verify this.

When you say "Serving a file through the alias fails", could you explain more 
fully what you mean?  Did Apache fail to find the file where the Alias said it 
should?

When an Apache Alias directive applies to a request, the Alias determines where 
the file is. No document root (neither the original per DocumentRoot, nor the 
replacement supplied by a DBDocRoot query) applies to the request.

See: http://httpd.apache.org/docs/2.2/mod/mod_alias.html#alias
"Alias ... allows documents to be stored in the local filesystem other than 
under the DocumentRoot".

Original comment by Thomas.D...@gmail.com on 12 Feb 2013 at 12:20

GoogleCodeExporter commented 9 years ago 
Yes, it could not find the file at the location where the Alias said it should. 
I tried it a couple of times, by commenting out the DBDocRoot directive. When 
its commented out the alias works, as soon as I uncomment it, I get an error.

Original comment by ashishpa...@gmail.com on 12 Feb 2013 at 12:30

GoogleCodeExporter commented 9 years ago 
Confirmed with httpd-2.2.21 on Windows.  

Similar to issue #6 - interaction with other modules which also translate URIs 
to filenames.   There is no practical way to influence all other 
name-translation modules in a predictable way.

The most practical fix is to disable any docroot lookup if any other module 
(e.g. mod_rewrite, mod_alias, mod_proxy, mod_userdir, mod_vhost_alias, etc.) 
has already set a directory or a full path for the request.    In other words - 
mod_vhost_dbd will run last, and will only perform a query and set a docroot if 
no other module has already selected a file path for the request.

Testing code change (small/easy) and writing doc change (bigger/harder).  
Unfortunately, this change may break some existing apps which depend on 
interaction between mod_vhost_dbd and mod_rewrite.

Original comment by Thomas.D...@gmail.com on 12 Feb 2013 at 6:35

GoogleCodeExporter commented 9 years ago 
Issue 6 has been merged into this issue.

Original comment by Thomas.D...@gmail.com on 12 Feb 2013 at 6:36