Ping: ping a Uniform resource locator (URL)

Description

***NOTE: THIS IS A PRELIMINARY VERSION OF THIS FUNCTION; ***NOTE: IT MAY BE CHANGED OR REMOVED IN A FUTURE RELEASE.

ping a Uniform resource locator (URL) or Internet Protocol (IP) address.

NOTE: Some Internet Service Providers (ISPs) play games with "ping". That makes the results of Ping unreliable.

Ping(url, pingArgs='', warn=NA,
     show.output.on.console=FALSE)

list with the following components:

rawResults: character vector of the raw results from the ping command
rawNumbers: numeric vector of the times measured
counts: numeric vector of numbers of packets sent, received, and lost
p.lost: proportion lost = lost / sent
stats: numeric vector of min, avg (mean), max, and mdev (standard deviation) of the measured round trip times

url

a character string of a URL or IP address to ping. If url is a vector of length greater than 1, only the first component is used.

pingArgs

arguments to pass to the ping command of typical operating systems via

pingResult <- system(paste('ping', pingArgs, url), intern=TRUE, ...)

warn

value for options('warn') during the call to system. NA to not change options('warn') during this call.

show.output.on.console

argument for system.

Spencer Graves

1. urlSplit0 <- strsplit(url, '://')[[1]]

2. urlS0 <- urlSplit0[min(2, length(urlSplit0))]

3. host <- strsplit(urlS0, '/')[[1]][1]

4. pingCmd <- paste('ping', pingArgs, host)

5. system(pingCmd, intern=TRUE, ...)