Get the filename or final location of a URL without downloading

resolve.R

# To request without downloading body set CURLOPT_NODOBY = TRUE
handle <- curl::new_handle(nobody = TRUE)
url <- 'https://httpbin.org/redirect-to?url=http%3A%2F%2Fexample.com%2F'
req <- curl::curl_fetch_memory(url, handle)
print(req$url)

# To get the 'filename' 
url <- 'http://pasta.lternet.edu/package/data/eml/knb-lter-ntl/320/4/4a283c25f3548c0f78d8a01658e4a353'
req <- curl::curl_fetch_memory(url, handle = handle)
grep("Content-Disposition:", curl::parse_headers(req$headers), value = TRUE)

Thanks! I am pushing that output through stringr::str_extract(output, "(?<=\\=)(.*?)\\.csv") to get only the filename.