libcurlVersion | R Documentation |
Report version of libcurl
in use.
libcurlVersion()
A character string, with value the libcurl
version in use or
""
if none is. If libcurl
is available, has attributes
ssl_version |
A character string naming the SSL/TLS implementation
and version, possibly |
libssh_version |
A character string naming the |
protocols |
A character vector of the names of supported protocols, also known as ‘schemes’ when part of a URL. |
In late 2017 a libcurl
installation was seen divided into two
libraries, libcurl
and libcurl-feature
, and the first
had been updated but not the second. As the compiled function
recording the version was in the latter, the version reported by
libcurlVersion
was misleading.
extSoftVersion
for versions of other third-party
software.
curlGetHeaders
, download.file
and
url
for functions which (optionally) use libcurl
.
https://curl.se/docs/sslcerts.html and
https://curl.se/docs/ssl-compared.html for more details on
SSL versions (the current standard being known as TLS). Normally
libcurl
used with R uses SecureTransport on macOS, OpenSSL on
Windows and GnuTLS, NSS or OpenSSL on Unix-alikes. (At the time of
writing Debian-based Linuxen use GnuTLS and RedHat-based ones use
OpenSSL, having previouly used NSS.)
libcurlVersion()
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