| # File src/library/utils/R/readhttp.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2012 The R Core Team |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # A copy of the GNU General Public License is available at |
| # https://www.R-project.org/Licenses/ |
| |
| url.show <- |
| function (url, title = url, file = tempfile(), |
| delete.file = TRUE, method, ...) |
| { |
| if (download.file(url, destfile = file, method = method, mode = "w")) |
| stop("transfer failure") |
| file.show(file, delete.file = delete.file, title = title, ...) |
| } |
| |
| |
| |
| defaultUserAgent <- function() |
| { |
| Rver <- paste(R.version$major, R.version$minor, sep=".") |
| Rdetails <- paste(Rver, R.version$platform, R.version$arch, |
| R.version$os) |
| paste0("R (", Rdetails, ")") |
| } |
| |
| |
| makeUserAgent <- function(format = TRUE) { |
| agent <- getOption("HTTPUserAgent") |
| if (is.null(agent)) { |
| return(NULL) |
| } |
| if (length(agent) != 1L) |
| stop(gettextf("%s option must be a length one character vector or NULL", |
| sQuote("HTTPUserAgent")), domain = NA) |
| if (format) paste0("User-Agent: ", agent[1L], "\r\n") else agent[1L] |
| } |