Installing a webserver on AXIOM Beta

1 Installing required packages

Make sure the AXIOM Beta is connected to the internet and then on the commandline run:

Update mirrors database:

pacman -Syy

Install webserver:

pacman -S lighttpd php php-cgi

start the webservice:

systemctl start lighttpd

write any pending changes to the file system:

sync

2 Configure Webserver

This is following the guide from the lighttpd archlinux wiki page: https://wiki.archlinux.org/index.php/lighttpd

mkdir /etc/lighttpd/conf.d/
nano /etc/lighttpd/conf.d/cgi.conf

and place the following content in the file:

server.modules += ( "mod_cgi" )

 cgi.assign                 = ( ".pl"  => "/usr/bin/perl",
                               ".cgi" => "/usr/bin/perl",
                               ".rb"  => "/usr/bin/ruby",
                               ".erb" => "/usr/bin/eruby",
                               ".py"  => "/usr/bin/python",
                               ".php" => "/usr/bin/php-cgi" )

 index-file.names           += ( "index.pl",   "default.pl",
                               "index.rb",   "default.rb",
                               "index.erb",  "default.erb",
                               "index.py",   "default.py",
                               "index.php",  "default.php" )

For PHP scripts you will need to make sure the following is set in /etc/php/php.ini

cgi.fix_pathinfo = 1

In your Lighttpd configuration file, /etc/lighttpd/lighttpd.conf add:

include "conf.d/cgi.conf"

Create a new configuration file /etc/lighttpd/conf.d/fastcgi.conf

# Make sure to install php and php-cgi. See:                                                             
# https://wiki.archlinux.org/index.php/Fastcgi_and_lighttpd#PHP

server.modules += ("mod_fastcgi")

# FCGI server
# ===========
#
# Configure a FastCGI server which handles PHP requests.
#
index-file.names += ("index.php")
fastcgi.server = ( 
    # Load-balance requests for this path...
    ".php" => (
        # ... among the following FastCGI servers. The string naming each
        # server is just a label used in the logs to identify the server.
        "localhost" => ( 
            "bin-path" => "/usr/bin/php-cgi",
            "socket" => "/tmp/php-fastcgi.sock",
            # breaks SCRIPT_FILENAME in a way that PHP can extract PATH_INFO
            # from it 
            "broken-scriptfilename" => "enable",
            # Launch (max-procs + (max-procs * PHP_FCGI_CHILDREN)) procs, where
            # max-procs are "watchers" and the rest are "workers". See:
            # https://redmine.lighttpd.net/projects/1/wiki/frequentlyaskedquestions#How-many-php-CGI-processes-will-lighttpd-spawn 
            "max-procs" => 4, # default value
            "bin-environment" => (
                "PHP_FCGI_CHILDREN" => "1" # default value
            )
        )
    )   
)

Make lighttpd use the new configuration file /etc/lighttpd/lighttpd.conf

include "conf.d/fastcgi.conf"

restart lighttpd:

systemctl restart lighttpd

To test php create a file: /srv/http/index.php with content:

<?php
phpinfo();
?>

and open this IP address of your AXIOM Beta in a browser, if you see the php info status page everything worked successfully.

3 Install AXIOM Beta web GUI software

Download this repository:

https://github.com/apertus-open-source-cinema/beta-software

1. copy all files from the http directory of the repository to your AXIOM Beta /srv/http/ directory.
2. copy all files from the beta-scripts directory of the repository to your AXIOM Beta /root/ directory.

Edit /etc/sudoers files:

under the line:

root ALL=(ALL) ALL

add:

http ALL=(ALL) NOPASSWD: ALL

This allows the http user to do anything with the system so it can be considered a security vulnerability - but for development this should not be an issue, later on we will define the http priviledges more securely.

For testing sudoers:

sudo -u http sudo whoami

if it returns "root" then you are all set

This should provide you with a working webbased GUI.

Note that lighttpd does not start automatically when the AXIOM Beta boots, this still needs to be configured:

systemctl enable lighttpd

Also note that opening any websites that read image sensor registers before initializing the image sensor (kick_manual.sh) will freeze/crash the camera.