r - Could not establish handwhake with twitteR -

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i'm trying use twitter package r. so, i'm trying establish handshake code :

requrl <- "https://api.twitter.com/oauth/request_token" accessurl <- "http://api.twitter.com/oauth/access_token" authurl <- "http://api.twitter.com/oauth/authorize" twitcred <- oauthfactory$new(consumerkey=mykey, consumersecret=mysecret, requesturl=requrl, accessurl=accessurl, authurl=authurl) twitcred$handshake()

this gets me error : error in function (type, msg, aserror = true) : couldn't connect host

since i'm behind proxy, suspect cause troubles. however, configured r (i can download packages without troubles). consequence, i'm little stuck.


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