Comments (2)
It is good practice to close()
the connection. If you forget to, the garbage collector closes the connection when it cleans up the con
object (with a warning). This holds for all connection types by the way (url()
, file()
, socket()
etc), not just curl()
. See also this topic.
Within a function, it is common to use the on.exit
finalizer for housekeeping. The benefit of on.exit
is that it also runs if the function exits with an error, so you can be sure the connection always gets closed.
do_something <- function(SOME_URL){
con <- curl(SOME_URL, open = "r")
on.exit(close(con))
readLines(con)
}
from curl.
Thanks that is helpful. Yes I had already decided to properly close the connections because the sheer volume of warnings was alarming. Good tip re: on.exit()
.
from curl.
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