public Request setContent(InputStream stream, ContentType contentType) {
        entity = new InputStreamEntity(stream, contentType);
        return this;
    }
public Request setContent ( InputStream stream , ContentType contentType ) { entity = new InputStreamEntity ( stream , contentType ) ; return this ; }
set request content from input stream with given content type
@param stream    : teh input stream to be used as http content
@param contentType   : type of content set in header
@return modified Request object with http content entity set