Protocol "sftp" not supported

[eguidotti]

Some users have reported that running:

RblConnect(...)

may raise the error:

Error in function (type, msg, asError = TRUE) :
Protocol "sftp" not supported

[eguidotti]

The issue is likely due to RCurl using a version of curl that was installed without sftp support.

To fix that, first set the path to point at a curl installation with sftp support (eg, install curl with openssl using homebrew on Mac).

PATH <- Sys.getenv("PATH")
version <- '8.4.0'
Sys.setenv(PATH = paste0("/opt/homebrew/Cellar/curl/", version, "/bin:", PATH))

Then, install RCurl from source

install.packages("RCurl", type = "source")

and check that the sftp protocol is supported.

RCurl::curlVersion()

$age
[1] 10
$version
[1] "8.4.0"
$vesion_num
[1] 525312
$host
[1] "aarch64-apple-darwin21.6.0"
$features
ipv6 ssl libz ntlm asynchdns spnego largefile idn tlsauth_srp
1 4 8 16 128 256 512 1024 16384
$ssl_version
[1] "SecureTransport (OpenSSL/3.1.4)"
$ssl_version_num
[1] 0
$libz_version
[1] "1.2.12"
$protocols
[1] "dict" "file" "ftp" "ftps" "gopher" "gophers" "http" "https"
[9] "imap" "imaps" "ldap" "ldaps" "mqtt" "pop3" "pop3s" "rtmp"
[17] "rtmpe" "rtmps" "rtmpt" "rtmpte" "rtmpts" "rtsp" "scp" "sftp"
[25] "smb" "smbs" "smtp" "smtps" "telnet" "tftp"
$ares
[1] ""
$ares_num
[1] 0
$libidn
[1] "2.3.4"

For more info, see here