httr makes http easy.
Each request returns a
which provides easy access to status code, cookies,
headers, timings, and other useful info. The content of
the request is available as a raw vector
content), character vector
text_content), or parsed into an R object
parsed_content), currently for html, xml,
json, png and jpeg).
httr supports OAuth 1.0 and 2.0. Use
oauth2.0_token get user tokens, and
sign_ouath2.0 to sign requests. The demos
directory has six demos of using OAuth: three for 1.0
(linkedin,twitter and vimeo) and three for 2.0 (facebook,