The SPECS-EUPORIAS Data Portal is based on a password-protected THREDDS data server providing metadata and data access to a set of geo-referenced atmospheric variables using OPeNDAP and other remote data access protocols. Therefore, before accessing the data, authentication is required at the SPECS-EUPORIAS Data Portal.
Within a R session, this step can be easily accomplished assuming that we already have a valid username and password. To this aim, in the following lines we illustrate how to proceed using the R-to-Java interface provided by the package rJava, which need to be installed and loaded before proceeding (For more information on the authentication procedure you can go to the following link:?http://www.unidata.ucar.edu/software/netcdf-java/v4.3/javadocAll/ucar/nc2/util/net/HTTPBasicProvider.html.
> library(rJava) > username <- "myUsername" # This is a character string with the username > password <- "myPassword" # This is a character string with the password > aux <- .jnew("ucar/nc2/util/net/HTTPBasicProvider", username, password) > J("ucar.nc2.util.net.HTTPSession")$setGlobalCredentialsProvider(aux)