Sample Web application using vdmR package

2017/10/03

This document illustrates the procedure for running the sample Web application using vdmR package.

Environment

• Ubuntu Server 16.04 LTS (minimum install)

Installation

1. Installing apache2

Install apache2 and related library for building rApache.

$ sudo apt-get install apache2 apache2-dev libapreq2-dev

Enable userdir Apache module.

$ sudo ln -s /etc/apache2/mods-available/userdir.load /etc/apache2/mods-enabled/
$ sudo ln -s /etc/apache2/mods-available/userdir.conf /etc/apache2/mods-enabled/

2. Installing latest version of R

$ sudo sh -c "echo 'deb https://cloud.r-project.org/bin/linux/ubuntu xenial/' \
> /etc/apt/sources.list.d/cran.list"
$ gpg --keyserver keyserver.ubuntu.com --recv-key E084DAB9
$ gpg -a --export E084DAB9 | sudo apt-key add -
$ sudo apt-get update
$ sudo apt-get install r-base r-base-dev

3. Installing rApache

$ sudo apt-get install devscripts git
$ git clone https://github.com/jeffreyhorner/rapache
$ cd rapache
$ debuild -us -uc
$ cd ..
$ sudo dpkg -i libapache2-mod-r-base*.deb

4. Installing vdmR and brew package

$ sudo apt-get install libgdal-dev libproj-dev libgeos-dev
$ sudo R
> install.packages(c("vdmR", "brew"))

5. Configuration for rApache

$ sudo vi /etc/apache2/mods-available/mod_R.conf

Edit mod_R.conf as follows.

REvalOnStartup "library(vdmR)"
REvalOnStartup "library(MASS)"

REvalOnStartup "my.source <- function(file=NULL,envir=NULL) sys.source(file,envir=new.env(parent=globalenv()))"

<Files *.R>
        SetHandler r-script
        RHandler my.source
</Files>

<Files *.brew>
        SetHandler r-script
        RHandler brew::brew
</Files>

Create symbolic link for enabiling rApache configuration.

$ sudo ln -s /etc/apache2/mods-available/mod_R.conf /etc/apache2/mods-enabled/

6. Restarting apache2

$ sudo service apache2 restart

7. Downloading and Setting files

$ mkdir public_html
$ cd public_html
$ git clone https://github.com/nonki1974/vdmR_webdemo
$ cd vdmR_webdemo
$ mkdir temp
$ chmod 777 temp

8. Access to demo page

Access to http://IP_ADDRESS/~USERNAME/vdmR_webdemo/