onliner to quickly test some urls using curl

otestu.sh

cat plainurls.txt | while read u;do echo "$(printf '%-100s' "$u")-> $((curl -I -s -m 5 -k "$u"||echo KO)|head -n 1 -)"; done

From a json file:
cat waybackurls.json|jq -r '.[]'|grep 'http'|cut -d '"' -f 2 | while read u;do echo "$(printf '%-100s' "$u")-> $((curl -I -s -m 5 -k "$u"||echo KO)|head -n 1 -)"; done

Using parallel to speed up the process:
cat plainurls.txt | parallel -j 20 -I# 'echo "$(printf "%-100s" "#") -> $((curl -I -s -m 5 -k "#"||echo KO)|head -n 1 -)"'

function otestu {
  cat $1 | parallel -j 20 -I# 'echo "$(printf "%-100s" "#") -> $((curl -I -s -m 5 -k "#"||echo KO)|head -n 1 -)"'
  #while read u;do echo "$(printf '%-100s' "$u")-> $((curl -I -s -m 5 -k "$u"||echo KO)|head -n 1 -)";done < $1
}

function otestuj {
  cat $1 | jq -r '.[]'|grep 'http'|cut -d '"' -f 2 | parallel -j 20 -I# 'echo "$(printf "%-100s" "#") -> $((curl -I -s -m 5 -k "#"||echo KO)|head -n 1 -)"'
  #while read u;do echo "$(printf '%-100s' "$u")-> $((curl -I -s -m 5 -k "$u"||echo KO)|head -n 1 -)";done < $1
}


ALTERNATIVES:

@4_N_K_1_T
xargs -a u -I{} curl {} -s -o /dev/null -w "%{http_code}""\t -> \t""{}""\n";