myip.sh

#!/usr/bin/env bash
# myip.sh — 查本机出口 IP / 信息（ipyou.net）
#
# 用法:
#   ./myip.sh            本机 IP 信息(纯文本)
#   ./myip.sh -q         只输出 IP(适合脚本取值)
#   ./myip.sh -j         JSON
#   ./myip.sh -x socks5h://127.0.0.1:1080   走代理查(确认代理出口)
#
# 依赖: curl(-q 与 -j 均无需 jq)
set -euo pipefail

BASE="${IPYOU_BASE:-https://ipyou.net}"
TIMEOUT="${IPYOU_TIMEOUT:-10}"
mode="text"
proxy=""

usage() { sed -n '2,12p' "$0" | sed 's/^# \{0,1\}//'; exit 0; }

while [ $# -gt 0 ]; do
  case "$1" in
    -q|--quiet) mode="ip" ;;
    -j|--json)  mode="json" ;;
    -x|--proxy) shift; proxy="${1:-}" ;;
    -h|--help)  usage ;;
    *) echo "未知参数: $1" >&2; exit 2 ;;
  esac
  shift
done

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

case "$mode" in
  # 只取 IP:从纯文本首行解析,免 jq 依赖
  ip)   curl "${curl_opts[@]}" "$BASE/" | sed -n 's/^IP[[:space:]]*:[[:space:]]*//p' | head -1 ;;
  json) curl "${curl_opts[@]}" -H "Accept: application/json" "$BASE/" ;;
  text) curl "${curl_opts[@]}" "$BASE/" ;;
esac