使用until循环：

#!/bin/bash

retry_timer=5
success_timer=120

function check_url_success() {
  local url=$1
  local response=$(curl -s /dev/null "$url")
  if [ "$response" == "success" ]; then
    return 0
  else
    return 1
  fi
}

urls=()
while IFS= read -r url; do
  urls+=("$url")
done < "sample.txt"

for url in "${urls[@]}"; do
  echo "Trying $url..."
  
  until check_url_success "$url"; do
    echo "Failed. Retrying..."
    sleep $retry_timer  # Add a delay before retrying
  done
  echo "Success for $url!"
  sleep $success_timer # Add a delay of 2 min when curl ping succeeded
done

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