Check the validity of URLs — check

This function opens a connection to the specified URLs to check their validity.

Usage

check_url(url = NULL, timeout = 2L, all_okay = TRUE)

Source

The source code of this function was taken from this stackoverflow discussion.

Arguments

url: Character. The URLs to be checked.
timeout: Numeric. Timeout in seconds for the connection attempt. Default is 2 seconds.
all_okay: Logical. If TRUE (default), returns a single logical output indicating the validity of all URLs; if FALSE, returns a logical vector for each URL.

Value

Logical: TRUE if all checks pass; FALSE otherwise.

Examples

urls <- c(
     "http://www.amazon.com", "http://this.isafakelink.biz",
     "https://stackoverflow.com", "https://stackoverflow505.com")
check_url(urls)
#> [1] FALSE
check_url(urls, all_okay = FALSE)
#> [1]  TRUE FALSE  TRUE FALSE