Created
March 13, 2026 03:16
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Multi-tier network connectivity check via 204 endpoints
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| #!/usr/bin/env bash | |
| # 本脚本需要部署在代理服务所在设备，用于对设备上内网代理服务的网络连通性检测 | |
| PROXY_SERVER="http://xxxx" | |
| lock=/tmp/.proxy.lock | |
| # URLs | |
| URL_DOMESTIC="http://connect.rom.miui.com/generate_204" | |
| URL_OVERSEAS_IP="http://1.1.1.1/generate_204" | |
| URL_GLOBAL_SVC="https://www.google.com/generate_204" | |
| # ========================================== | |
| # 探测函数 | |
| # ========================================== | |
| check_step() { | |
| local cmd=$1 | |
| local desc=$2 | |
| echo -n "正在检测 $desc... " | |
| local code=$(eval "$cmd") | |
| if [ "$code" -eq 204 ]; then | |
| echo -e "\e[32m[PASS]\e[0m ($code)" | |
| return 0 | |
| else | |
| echo -e "\e[31m[FAILED]\e[0m ($code)" | |
| return 1 | |
| fi | |
| } | |
| # --- 1. 国内直连探测 --- | |
| check_step "curl -q -I -s -o /dev/null -w '%{http_code}' --connect-timeout 5 $URL_DOMESTIC" "国内基础链路 (直连) | |
| " || exit 1 | |
| # --- 2. 跨境 IP 探测 --- | |
| # 验证代理转发及跨境 IP 连通性，注入 Host 避免 403 | |
| check_step "curl -q -I -s -o /dev/null -w '%{http_code}' --connect-timeout 5 -H 'Host:cp.cloudflare.com' $URL_OV | |
| ERSEAS_IP" "跨境 IP 路由 (Host注入)" || exit 1 | |
| # --- 3. 全球 HTTPS 服务探测 --- | |
| if check_step "curl -q -I -s -o /dev/null -w '%{http_code}' --connect-timeout 5 -x $PROXY_SERVER $URL_GLOBAL_SVC | |
| " "全球服务应用层 (Google)"; then | |
| echo "--------------------------------------" | |
| echo "所有检测阶段已通过，出海链路状态：Excellent" | |
| [ -f "$lock" ] && rm $lock && $HOME/bin/notify.sh "Home ss back to normal." | |
| exit 0 | |
| fi | |
| echo "Proxy failed, 如果依然失败，建议重启家里的路由器(即重新拨号)" | |
| systemctl --user restart sslocal kcptun && echo "Restarted sslocal+kcptun" | |
| # 如果 lock 文件存在就不再发送告警通知。 | |
| [ ! -f "$lock" ] && touch $lock && [ -x $HOME/bin/notify.sh ] && $HOME/bin/notify.sh "Home ss restarted." |
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