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Posted to users@httpd.apache.org by Parke <pa...@gmail.com> on 2015/09/06 01:06:43 UTC
[users@httpd] undocumented silent failure of mod_autoindex (without mod_dir)
Hi,
I was adapting some old apache.conf files today. I wanted to use
mod_autoindex, and I know it worked with these configuration files
previously (perhaps with an older version of Apache). But I kept on
getting 404 errors instead of directory listings.
After some web searching, I found this page:
http://fabien.agranier.com/en/apache-options-indexes-ignored-by-apache-2-4/
"If you started using Apache 2.4, you may have noticed auto indexes
are not working anymore, [...] It turns out you now need to disable
DirectoryIndex in order to have auto indexes working."
DirectoryIndex itself depends on mod_dir.
So... mod_autoindex will load, its directives will parse without
error, static files will be served, yet GETting a directory will
result in a 404 error, with no details in the error log (even with
LogLevel debug) as to why mod_autoindex is not generating dynamic
indexes.
Undocumented, silent failures can be frustrating to diagnose.
Perhaps the mod_autoindex documentation could be improved to include:
1) an explicit explanation of mod_autoindex's dependency on mod_dir
and DirectoryIndex
2) a sample, minimal, functioning configuration of mod_autoindex
https://httpd.apache.org/docs/current/mod/mod_autoindex.html
(Aside: is there even any way to use mod_autoindex without mod_dir?)
Thanks!
Parke
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Re: [users@httpd] undocumented silent failure of mod_autoindex
(without mod_dir)
Posted by Parke <pa...@gmail.com>.
On Sat, Sep 5, 2015 at 7:09 PM, Eric Covener <co...@gmail.com> wrote:
> On Sat, Sep 5, 2015 at 9:45 PM, Eric Covener <co...@gmail.com> wrote:
>> mod_dir has some code to make up for mod_mime not having run that
>> satisfies the check in mod_autoindex.
>
> Added a fix to trunk that allows mod_autoindex to work w/o
> mod_mime/mod_dir and proposed for 2.4.x
Cool! Thanks!
-Parke
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Re: [users@httpd] undocumented silent failure of mod_autoindex
(without mod_dir)
Posted by Eric Covener <co...@gmail.com>.
On Sat, Sep 5, 2015 at 9:45 PM, Eric Covener <co...@gmail.com> wrote:
> mod_dir has some code to make up for mod_mime not having run that
> satisfies the check in mod_autoindex.
Added a fix to trunk that allows mod_autoindex to work w/o
mod_mime/mod_dir and proposed for 2.4.x
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Re: [users@httpd] undocumented silent failure of mod_autoindex
(without mod_dir)
Posted by Eric Covener <co...@gmail.com>.
On Sat, Sep 5, 2015 at 9:29 PM, Parke <pa...@gmail.com> wrote:
> If there are nuances in my configuration file that are causing
> mod_autoindex to silently fail, I'd be happy to know what those
> nuances are.
It apparently requires mod_mime to recognize a directory is being served.
mod_dir has some code to make up for mod_mime not having run that
satisfies the check in mod_autoindex.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] undocumented silent failure of mod_autoindex
(without mod_dir)
Posted by Parke <pa...@gmail.com>.
On Sat, Sep 5, 2015 at 4:26 PM, Eric Covener <co...@gmail.com> wrote:
> On Sat, Sep 5, 2015 at 7:06 PM, Parke <pa...@gmail.com> wrote:
>> Undocumented, silent failures can be frustrating to diagnose.
>>
>> Perhaps the mod_autoindex documentation could be improved to include:
>> 1) an explicit explanation of mod_autoindex's dependency on mod_dir
>> and DirectoryIndex
>> 2) a sample, minimal, functioning configuration of mod_autoindex
>
> I think you're mis-observing something here. The relationship is
> exactly the intiutitive relationship as its described at the top of
> mod_autoindex:
>
> http://httpd.apache.org/docs/2.4/mod/mod_autoindex.html
>
> Summary
>
> The index of a directory can come from one of two sources:
>
> * A file written by the user, typically called index.html. The
> DirectoryIndex directive sets the name of this file. This is
> controlled by mod_dir.
> * Otherwise, a listing generated by the server. The other directives
> control the format of this listing. The AddIcon, AddIconByEncoding and
> AddIconByType are used to set a list of icons to display for various
> file types; for each file listed, the first icon listed that matches
> the file is displayed. These are controlled by mod_autoindex.
It is not intuitive to me that "Otherwise" means "if (and only if)
both mod_dir is loaded and no DirectoryIndex is found".
I read "Otherwise" as meaning "if the index does not come from
mod_dir". In my case, there were at least two good reason to believe
that the index would not come from "mod_dir". (1) mod_dir was not
loaded. (2) there was no "index.html" file in the requested
directory.
> mod_autoindex works without mod_dir loaded and works with mod_dir
> loaded as when you request a directory that doesn't have one of the
> named DirectoryIndex files. If it's failing for you, it's something
> more nuanced (like some other directives changing where the request is
> mapped to)
I did some more testing, and it turns out that I was partly incorrect.
Setting DirectoryIndex to disabled has no effect. However, I still
need to load mod_dir before I get indexes from mod_autoindex.
If there are nuances in my configuration file that are causing
mod_autoindex to silently fail, I'd be happy to know what those
nuances are.
Here is the relevant configuration file in its entirety.
----
ServerName localhost
DocumentRoot /tmp
Listen 8005
ErrorLog /tmp/error
PidFile /tmp/pid
### core apache 2.4
LoadModule authn_core_module /usr/lib/apache2/modules/mod_authn_core.so
LoadModule authz_core_module /usr/lib/apache2/modules/mod_authz_core.so
LoadModule mpm_prefork_module /usr/lib/apache2/modules/mod_mpm_prefork.so
### auto index
LoadModule autoindex_module /usr/lib/apache2/modules/mod_autoindex.so
Options +Indexes
IndexOptions FancyIndexing
# uncomment the next line to actiavte mod_autoindex
# LoadModule dir_module /usr/lib/apache2/modules/mod_dir.so
----
I am running on Ubuntu 14.04, with apache2 package version
2.4.7-1ubuntu4.5. I am running apache2 as non-root.
Thanks!
-Parke
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Re: [users@httpd] undocumented silent failure of mod_autoindex
(without mod_dir)
Posted by Eric Covener <co...@gmail.com>.
On Sat, Sep 5, 2015 at 7:06 PM, Parke <pa...@gmail.com> wrote:
> Undocumented, silent failures can be frustrating to diagnose.
>
> Perhaps the mod_autoindex documentation could be improved to include:
> 1) an explicit explanation of mod_autoindex's dependency on mod_dir
> and DirectoryIndex
> 2) a sample, minimal, functioning configuration of mod_autoindex
I think you're mis-observing something here. The relationship is
exactly the intiutitive relationship as its described at the top of
mod_autoindex:
http://httpd.apache.org/docs/2.4/mod/mod_autoindex.html
Summary
The index of a directory can come from one of two sources:
* A file written by the user, typically called index.html. The
DirectoryIndex directive sets the name of this file. This is
controlled by mod_dir.
* Otherwise, a listing generated by the server. The other directives
control the format of this listing. The AddIcon, AddIconByEncoding and
AddIconByType are used to set a list of icons to display for various
file types; for each file listed, the first icon listed that matches
the file is displayed. These are controlled by mod_autoindex.
-/-
mod_autoindex works without mod_dir loaded and works with mod_dir
loaded as when you request a directory that doesn't have one of the
named DirectoryIndex files. If it's failing for you, it's something
more nuanced (like some other directives changing where the request is
mapped to)
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