Check if a port of a server is active, measure response time

is_up() checks if a web server is up.

ping_port(
  destination,
  port = 80L,
  continuous = FALSE,
  verbose = continuous,
  count = 3L,
  timeout = 1
)

is_up(
  destination,
  port = 80,
  timeout = 0.5,
  fail_on_dns_error = FALSE,
  check_online = TRUE
)

Arguments

destination: Host name or IP address.
port: Port.
continuous: Logical, whether to keep pinging until the user interrupts.
verbose: Whether to print progress on the screen while pinging.
count: Number of pings to perform.
timeout: Timeout, in seconds. How long to wait for a ping to succeed.
fail_on_dns_error: If TRUE then is_up() fails if the DNS resolution fails. Otherwise it will return FALSE.
check_online: Whether to check first if the computer is online. Otherwise it is possible that the computer is behind a proxy, that hijacks the HTTP connection to destination.

Value

Vector of response times, in milliseconds. NA means no response within the timeout.

Examples

ping_port("r-project.org")
#> [1] 121.840 121.445 123.178
is_up("google.com")
#> [1] TRUE
is_up("google.com", timeout = 0.01)
#> [1] FALSE