Printing via CUPS and attaching files to labfolder logbooks
===========================================================

Follow this guide to set up CUPS virtual printers to be able to print webpages and pictures/files (PDF, PNG, JPG, PS) to one of labfolder's logbooks, thus, creating a new entry with an attachment. If you are an admin of the labfolder VM read the section :ref:`section_cups_admin`. Users of labfolder read the section :ref:`section_cups_user`.


.. _section_cups_admin:

Set up CUPS as labfolder admin
------------------------------

First, you need to install CUPS on the virtual machine that runs labfolder::

	sudo apt-get install cups cups-client cups-bsd

Next, configure ``/etc/cups/cupsd.conf``::

	# Sample configuration file for the CUPS scheduler.  See "man cupsd.conf" for a
	# complete description of this file.

	# Log general information in error_log - change "warn" to "debug"
	# for troubleshooting...
	LogLevel debug

	# Deactivate CUPS' internal logrotating, as we provide a better one, especially
	# LogLevel debug2 gets usable now
	MaxLogSize 0

	# Administrator user group...
	SystemGroup lpadmin
	ServerAdmin <name>@fhi-berlin.mpg.de

	HostNameLookups On
	ServerAlias *

	# Only listen for connections from the local machine.
	Listen lftest.rz-berlin.mpg.de:631
	Listen /var/run/cups/cups.sock

	# Show shared printers on the local network.
	Browsing Off
	BrowseOrder allow,deny
	BrowseAllow all
	BrowseLocalProtocols CUPS dnssd
	BrowseAddress @LOCAL

	# Default authentication type, when authentication is required...
	DefaultAuthType Basic

	# Web interface setting...
	WebInterface Yes

	# Restrict access to the server...
	<Location />
	  Satisfy All
	  Allow localhost
	  Allow 141.14.*
	  Allow 172.16.*
	  Allow 192.*
	  Allow all
	  # Allow shared printing and remote administration...
	  Order allow,deny
	  Allow all
	</Location>

	# Restrict access to the admin pages...
	<Location /admin>
	  Order deny,allow
	  Satisfy All
	  AuthType Basic
	  Require user @SYSTEM
	  Deny All
	  Allow localhost
	  Allow 141.14.*
	  Allow 172.16.*
	</Location>

	# Restrict access to configuration files...
	<Location /admin/conf>
	  Order deny,allow
	  AuthType Default
	  Require user @SYSTEM
	  Satisfy All
	  Require user root
	  Deny All
	  Allow 127.0.0.1
	  Allow 141.14.*
	  Allow 172.16.*
	</Location>

	# Set the default printer/job policies...
	<Policy default>
	  ... # probably as in the original
	</Policy>

Change the *Server Admin*'s e-mail address and the server that shall be listened to (see the ``Listen`` statement). Set ``FileDevice Yes`` in ``/etc/cups/cups-files.conf``. Now, create a directory where all printers will go, e.g. ``/usr/local/labfolder/printers``.

Get the package for creating new printers from git::

	labfolder@lftest:~$ git clone https://github.molgen.mpg.de/weiher/cupsPrinters
	labfolder@lftest:~$ ls
	cupsPrinters  labfolder

The only file you need to adapt is ``newPrinter.sh``. It is not a must but it is suggested to name the printers like the projects. For example, the FEL projects *operating* and *installation* could be placed at ``.../printers/FEL/operating`` and ``.../printers/FEL/installation``. Execute the script with sudo rights::

	labfolder@lftest:~/cupsPrinters$ sudo ./newPrinter.sh

To prevent ``DENIED`` errors from apparmor install and set the following and restart the CUPS server::

	$ sudo apt-get install apparmor-utils apparmor-profiles
	$ sudo aa-complain cupsd
	$ sudo service cups restart

In case you need to debug some logfiles can be found here: */var/log/syslog*, */var/log/cups/error_log* and */var/log/cups/acces_log*

One last change is that you need to once add a user named *Printer Print* (firstname lastname) to the labfolder database. This can be done manually inside the DB by this command::

	$ mysql -u root -p
	Enter password:
	...
	mysql> use labfolder;
	mysql> INSERT INTO user (email, password, firstname, lastname, signupTimestamp, maxStorage) VALUES ('printer@fhi-berlin.mpg.de', '91a13f2aba4a35b00c35dfacadd1d75f4a5171dfa7a465fca9c40e6b007ce982', 'Printer', 'Print', '2018-03-21 10:54:00', '10000000');

Das Passwort steht für "test1234". Der entsprechende Hash-Wert im MySQL-Kommando wurde von Florian Hauer (labfolder) erstellt.

.. _section_cups_user:

Printing to labfolder projects
------------------------------

The last thing you need to do is to set up a printer, for example, *operating* on your local machine. In Ubuntu Gnome hit Alt+F2 keys and enter ``system-config-printer``. In this printer config interface add a new printer *operating* as follows:

.. image:: _static/create_local_printer01.png
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer02.png   
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer03.png
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer04.png
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer05.png
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer06.png
   :width: 70 %
   :align: center


.. image:: _static/create_local_printer07.png
   :width: 70 %
   :align: center

Now, just select this printer when printing a webpage or a picture to a labfolder project.