[R] Using open calais in R

[fayazvf]

I am using calais api in R for text analysis.
But im facing a some problem when fetching the rdf from the server.
I'm using the getToHost() method for the api call but i get just a null
string.
The same url in browser returns an RDF document. 

>getToHost("www.api.opencalais.com",/enlighten/rest/?licenseID=dkzdggsre232ur97c6be269g&content=Home&paramsXML=")
>[1] ""
"http://api.opencalais.com/enlighten/rest/?licenseID=dkzdggsre232ur97c6be269g&content=Home&paramsXML="
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