[Qgis-user] Problems with Qgis Server 2.12

[Henrik Uggla]

I tried to set QGIS_AUTH_DB_DIR_PATH and the error message in the Apache log disappeared. I still got the "WMS configuration error" message though. It turned out to be the map parameter. In 2.8 you did not have to give the map parameter when there were only one .qgs-file was present. In 2.12 it is obviously mandatory. Thanks for your input!


/Henrik



________________________________
Från: larry at shafferinteractive.com <larry at shafferinteractive.com> för Larry Shaffer <larrys at dakotacarto.com>
Skickat: den 27 oktober 2015 19:22
Till: Henrik Uggla
Kopia: Andreas Neumann; qgis-user
Ämne: Re: [Qgis-user] Problems with Qgis Server 2.12

Hi Henrik,

This is due to the new authentication system in 2.12 [0], and the support I added to Server. When running Server, projects loaded that contain an authentication configuration (instead of clear text username/password) for accessing a secured resource, e.g. WMS using Basic Auth and HTTPS, need to be able to access the new 'qgis-auth.db'.

The auth configurations are encrypted using a master password and stored in the qgis-auth.db, which by default is located at ~/.qgis2/qgis-auth.db for a desktop QGIS user. To enable Server support, I added two environment variables to overcome the problems associated with automatically loading projects [1], which are not yet fully documented:

* QGIS_AUTH_DB_DIR_PATH - Directory where an existing qgis-auth.db is located or created if not present. This directory needs to be *writeable* by Server's FCGI process user (which may differ from Apache's).

* QGIS_AUTH_PASSWORD_FILE - File path to file with master password as first line. This is similar to password files used by database servers. The env variable is read during QGIS startup, then removed from the env variables space, so it is not available later on to the FCGI process or any Server plugins. Since all auth configurations are encrypted, a master password is required to access the qgis-auth.db, if a loaded project uses auth configs stored in the qgis-auth.db.

What you have found is possibly a bug: the QGIS_AUTH_DB_DIR_PATH is now required to start Server, even if no loaded project make use of the new auth system. This is not really a bug if one considers the auth system setup mandatory from 2.12+, like it is on Desktop. At the minimum, a missing/non-writeable qgis-auth.db directory should throw a warning and not an error, allowing Server to launch.

Please try setting QGIS_AUTH_DB_DIR_PATH to a directory writeable by the Server's FCGI process user and see if Server starts normally. Then check that qgis-auth.db is created in the directory.

Here is how to set the env variables for the FCGI process in Apache [2,3]. Note, setting them at the Apache process level will not work.


[0] https://github.com/dakcarto/QGIS-Enhancement-Proposals/blob/auth-system/qep-14-authentication-system.rst
[1] https://github.com/qgis/QGIS/blob/master/src/server/qgsserver.cpp#L359-L362
[2] https://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html#fcgidinitialenv
[3] http://www.fastcgi.com/mod_fastcgi/docs/mod_fastcgi.html  (-initial-env options)

Regards,

Larry Shaffer
Dakota Cartography
Black Hills, South Dakota

QGIS Support/Development | Boundless<http://boundlessgeo.com/>

On Tue, Oct 27, 2015 at 4:43 AM, Henrik Uggla <Henrik.Uggla at kristianstad.se<mailto:Henrik.Uggla at kristianstad.se>> wrote:
It seems to be caused by some file somewhere having wrong permissions. This error is from my Apache log:
ERROR: Auth db directory path could not be created

Googling the phrase I found this:
http://qgis.org/api/qgsauthmanager_8cpp_source.html

Where is this db directory path supposed to be created?

Henrik

________________________________________
Från: Qgis-user <qgis-user-bounces at lists.osgeo.org<mailto:qgis-user-bounces at lists.osgeo.org>> för Andreas Neumann <a.neumann at carto.net<mailto:a.neumann at carto.net>>
Skickat: den 27 oktober 2015 05:37
Till: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Ämne: Re: [Qgis-user] Problems with Qgis Server 2.12

Hi Henrik,

Any errors in the Apache log files? Or QGIS server log file?

Did you specify the map parameter or use an according Apache rewrite rule?

Is there an X-Server running?

Andreas

On 26.10.2015 22:11, Henrik Uggla wrote:
> I'm using Ubuntu 12.04 and upgraded Qgis Server from version 2.8.3 with Ubuntugis dependencies to 2.12 with Ubuntugis dependencies. Now no Qgis Server web services is working anymore. All I get when I try service=WMS&request=GetCapabilities is:
>
> <ServiceException code="WMS configuration error">
> There was an error reading the project file or the SLD configuration
> </ServiceException>
>
> Is anyone else experiencing this?
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org<mailto:Qgis-user at lists.osgeo.org>
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