Create a custom file connection

Usage

vfs_file(description, mode = "", verbosity = 0L)

description: path to a filename; contrary to rconnection a connection object is not supported.
mode: character string. A description of how to open the connection if it is to be opened upon creation e.g. "rb". Default "" (empty string) means to not open the connection on creation - user must still call open(). Note: If an "open" string is provided, the user must still call close() otherwise the contents of the file aren't completely flushed until the connection is garbage collected.
verbosity: integer value 0, 1, or 2. Default: 0. Set to 0 for no debugging messages, 1 for some high-level messages and verbosity = 2 for all debugging messages.

This vfs_file() connection works like the file() connection in R itself.

This connection works with both ASCII and binary data, e.g. using readLines() and readBin().

if (FALSE) { # \dontrun{
tmp <- tempfile()
dat <- as.raw(1:255)
writeBin(dat, vfs_file(tmp))
readBin(vfs_file(tmp),  raw(), 1000)
} # }