#' Use checkip.dyndns.org to retrieve public IP address
#'
#' @importFrom httr GET content
#' @importFrom xml2 read_html xml_text
#' @export
opendns <- function() {
req <- httr::GET("http://checkip.dyndns.org/")
res <- httr::content(req, as="text", encoding="UTF-8")
res <- xml2::read_html(res)
res <- xml2::xml_text(res)
res <- gsub("Current IP CheckCurrent IP Address: ", "", res)
ret <- list(ipv4=ipv4(res), ipv6=ipv6(res))
class(ret) <- c("myip", class(ret))
return(ret)
}
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