No problem trying to upload a csv file:
url <- read.csv("http://databank.worldbank.org/data/download/GDP.csv")
When trying to upload the same file, but xls:
urn <- read_xls("http://databank.worldbank.org/data/download/GDP.xls")
I receive the following error:
Error: `path` does not exist: ‘http://databank.worldbank.org/data/download/GDP.xls’