Last active
May 10, 2024 10:50
-
-
Save oousmane/a78eb6947215f7e3134de4d4dbc61376 to your computer and use it in GitHub Desktop.
List the files in a FTP (remote) directory/folder
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#' List the files in a FTP (remote) directory/folder | |
#' @description | |
#' This function produce a character vector of the names of files in the ftp folder provided | |
#' | |
#' @param ftp FTP base directory/folder | |
#' @param pattern an optional regular expression. Only file names which match the regular expression will be returned. | |
#' @author Adam H. Sparks, Ousmane Ouedraogo | |
#' | |
#' @return character vector of the names of files in FTP base directory | |
#' @export | |
#' | |
#' @examples | |
#' ftp_base <- "ftp.cpc.ncep.noaa.gov/International/nmme/seasonal_nmme_forecast_in_cpt_format/" | |
#' ftp_files <- ftp_dir_ls(ftp = ftp_base) | |
#' ftp_files[1:10] | |
#' | |
ftp_dir_ls <- function(ftp, pattern=NULL) | |
{ | |
list_files <- curl::new_handle() | |
curl::handle_setopt( | |
list_files, | |
ftp_use_epsv = TRUE, | |
dirlistonly = TRUE | |
) | |
con <- curl::curl( | |
url = ftp, | |
"r", | |
handle = list_files) | |
if (is.null(pattern)){ | |
files <- readLines(con) | |
} else { | |
files <- readLines(con) | |
files <- files[stringr::str_detect(files, pattern = pattern)] | |
} | |
close(con) | |
return(files) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment