McClass

MisConception-aware Competence Learning and Assessment Smart System

If you wish, try it at https://mcclass.vps.webdock.cloud/mcclass

Step 1: install R

Install a current version of R

sudo apt install r-base

Invoke R, and then

• install.packages("RInside")
• install.packages("Rserve", repos="http://rforge.net/", type="source")
• You also need WriteXLS for exporting Excel files: install.packages("WriteXLS")
• quit()

Later, you just invoke R -e "Rserve::Rserve()" to start the R server.

Step 2: install postgresql

sudo apt install unixodbc-dev odbc-postgresql postgresql-contrib

The rest is described in database.txt.

Later, you just invoke sudo service postgresql restart to start the database.

Step 3: install Prolog

Install a current version of SWI-Prolog from www.swi-prolog.org.

sudo apt install swi-prolog-odbc

Invoke swipl, and then

• pack_install(rologp).
• pack_install(quantity).
• halt.

Start the server

To serve incoming connections at 8001 under linux, enter the folder mcclass and call

swipl server.pl --port=8001 --pidfile=http.pid

Use kill $(cat http.pid) to stop the server. Sometimes this doesn't work, then use killall -9 swipl :-)

Watch the program

Open firefox and go to http://localhost:8001/mcclass

Behind an Apache proxy

Let's assume you have a working https-configuration. Then add the following two lines to your, e.g., /etc/apache2/sites-enabled/000-default-le-ssl.conf

    ProxyPass               /mcclass        http://localhost:8001/mcclass
    ProxyPassReverse        /mcclass        http://localhost:8001/mcclass

Then enable the reverse proxy with sudo a2enmod proxy, sudo a2enmod proxy_http, systemctl restart apache2.

This "worked for me", but I am no expert in network stuff.