ipwatch.sh

#!/usr/bin/env bash
# ipwatch.sh — 持续监控出口 IP，只在**变化时**输出（ipyou.net）
#
# 适合: 换代理节点、拨号重连、机场线路漂移、判断代理是否掉线回落到真实 IP
#
# 用法:
#   ./ipwatch.sh              每 10 秒查一次
#   ./ipwatch.sh 30           每 30 秒查一次
#   ./ipwatch.sh 10 -d        变化时同时打印完整详情(归属/类型/风控)
#   ./ipwatch.sh 10 -x socks5h://127.0.0.1:1080    盯代理出口
#
# 依赖: curl。Ctrl-C 退出。
set -uo pipefail

BASE="${IPYOU_BASE:-https://ipyou.net}"
TIMEOUT="${IPYOU_TIMEOUT:-10}"
interval=10
detail=0
proxy=""

usage() { sed -n '2,15p' "$0" | sed 's/^# \{0,1\}//'; exit 0; }

while [ $# -gt 0 ]; do
  case "$1" in
    -d|--detail) detail=1 ;;
    -x|--proxy)  shift; proxy="${1:-}" ;;
    -h|--help)   usage ;;
    ''|*[!0-9]*) echo "未知参数: $1" >&2; exit 2 ;;
    *) interval="$1" ;;
  esac
  shift
done

curl_opts=(-s --max-time "$TIMEOUT")
if [ -n "$proxy" ]; then curl_opts+=(--proxy "$proxy"); fi

last=""
echo "监控出口 IP，每 ${interval}s 检查一次（Ctrl-C 退出）"

while true; do
  # 从纯文本首行解析 IP,免 jq 依赖
  now=$(curl "${curl_opts[@]}" "$BASE/" 2>/dev/null \
        | sed -n 's/^IP[[:space:]]*:[[:space:]]*//p' | head -1 | tr -d '\r')
  ts=$(date '+%F %T')

  if [ -z "$now" ]; then
    [ "$last" != "__down__" ] && echo "[$ts] ⚠ 查询失败(网络不通或超时)"
    last="__down__"
  elif [ "$now" != "$last" ]; then
    if [ -z "$last" ] || [ "$last" = "__down__" ]; then
      echo "[$ts] 当前出口: $now"
    else
      echo "[$ts] ⚡ IP 变化: $last  →  $now"
    fi
    if [ "$detail" = "1" ]; then
      curl "${curl_opts[@]}" "$BASE/" | sed 's/^/    /'
    fi
    last="$now"
  fi

  sleep "$interval"
done