Check whether a DOI resolves

Checks the doi.org API to see if a DOI is registered and has an associated URL (using https://doi.org/api/handles). Returns TRUE if it does, FALSE if the DOI does not exist or does not have an associated URL, and NA if the test failed. Clearly invalid DOIs (i.e. not starting with "10.") will return FALSE without server requests.

Usage

doi_resolves(doi, timeout = 10)

Arguments

doi

Character vector. One or more DOIs to check.

timeout

Numeric. Request timeout in seconds. Default is 10.

Value

Logical vector. For each input DOI, returns TRUE if the DOI resolves, FALSE if it does not resolve (or does not start with 10.), and NA if the check failed.

Examples

# \donttest{
if (online("doi.org")) {
  doi_resolves("10.1038/nphys1170") # Expected: TRUE
  doi_resolves("10.1234/invalid.doi") # Expected: FALSE
}
#> [1] FALSE
# }