My downloader package was created to deal with https on various platforms: http://cran.r-project.org/web/packages/downloader/index.html
The package dates back to before R had libcurl support. It's very simple: if you're on Windows, it uses setInternet2(), which enable https support, and if you're on non-Windows, it looks for wget, curl, and then lynx. You don't have to import downloader in order to do this - there's just one function you'd need, which, as far as I'm concerned, you can put in your code: https://github.com/wch/downloader/blob/master/R/download.r If you need the code to officially relicensed, feel free to contact me by email. -Winston On Fri, Jul 3, 2015 at 9:24 AM, Paul Gilbert <pgilbert...@gmail.com> wrote: > The difficulty with most workarounds suggested so far is the expanded list > of dependencies. My package and quantmod, have had a simple dependency on > download.file in utils. Picking on Dirks suggestion as an example, it would > add a system dependency on libcurl and an R package dependency on curl, > which in turn has system dependencies libcurl-devel (rpm) or > libcurl4-openssl-dev (deb). Furthermore, it suggests testthat, knitr, > jsonlite, rmarkdown, and magrittr, which means that these and their > dependencies, imports, and suggests all need to be installed and working in > order for me to test, and working with R-devel for me to submit to CRAN. > > Let me mention again that this problem is not specific to my package or > quantmod. It will be quickly affecting everyone that downloads from US > government websites, not to mention that other governments and commercial > web sites may start doing the same thing. > > Paul > > On 07/03/2015 06:39 AM, Dirk Eddelbuettel wrote: >> >> >> In random, I do the following, using R 3.2.0 or later with libcurl where >> installed, and Jeroen's lightweight curl::curl otherwise. >> >> >> getConnection <- function(urltxt, ...) { >> if (getRversion() >= "3.2.0" && capabilities()["libcurl"]) { >> url(urltxt, ..., method="libcurl") >> } else { >> curl(urltxt, ...) >> } >> } >> >> closeConnection <- function(con) { >> if (getRversion() >= "3.2.0" && capabilities()["libcurl"]) { >> close(con) >> } else { >> ## nothing to be done for curl() >> } >> } >> >> >> Hth, Dirk >> > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
