#!/usr/bin/env bash
set -u
# ============================================================
# Nginx 配置实战 一键脚本（macOS / Linux / WSL）
# 公开源码，欢迎审查 —— 不放心可先复制给 AI 判断
# ============================================================
GREEN='\033[0;32m'; YELLOW='\033[1;33m'; RED='\033[0;31m'; CYAN='\033[0;36m'; NC='\033[0m'
info() { echo -e "${GREEN}[INFO]${NC} $1"; }
warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
error() { echo -e "${RED}[ERROR]${NC} $1"; }
step() { echo -e "${CYAN}[STEP]${NC} $1"; }
detect_network() {
step "检测网络环境（国内 / 国外）..."
if curl -fsI --max-time 5 "https://claude.ai" >/dev/null 2>&1; then
info "可直连 claude.ai，判定为海外网络"
echo "overseas"
else
warn "无法直连 claude.ai，判定为国内网络环境"
echo "domestic"
fi
}
detect_os() {
if command -v apt >/dev/null 2>&1; then
echo "debian"
elif command -v yum >/dev/null 2>&1; then
echo "centos"
elif command -v brew >/dev/null 2>&1; then
echo "macos"
else
error "无法识别的系统类型（需要 apt/yum/brew 其中之一）"
exit 1
fi
}
install_nginx() {
local os="$1"
step "安装 Nginx（${os} 系统）..."
case "$os" in
debian)
if sudo apt update >/dev/null 2>&1 && sudo apt install -y nginx >/dev/null 2>&1; then
info "Nginx 安装成功（apt）"
return 0
fi
warn "apt 安装失败，尝试国内镜像源..."
error "请手动执行：sudo apt update && sudo apt install -y nginx"
return 1
;;
centos)
if sudo yum install -y epel-release >/dev/null 2>&1 && \
sudo yum install -y nginx >/dev/null 2>&1; then
info "Nginx 安装成功（yum + EPEL）"
return 0
fi
warn "yum 安装失败"
error "请手动执行：sudo yum install -y epel-release nginx"
return 1
;;
macos)
if brew install nginx >/dev/null 2>&1; then
info "Nginx 安装成功（brew）"
return 0
fi
error "brew 安装失败，请确保已安装 Homebrew（https://brew.sh）"
return 1
;;
esac
}
generate_config() {
step "生成示例站点配置..."
local cfg_dir=""
local os="$1"
if [ "$os" = "macos" ]; then
cfg_dir="$(brew --prefix)/etc/nginx/servers"
mkdir -p "$cfg_dir"
elif [ "$os" = "centos" ]; then
cfg_dir="/etc/nginx/conf.d"
else
cfg_dir="/etc/nginx/sites-available"
mkdir -p "$cfg_dir"
fi
cat > /tmp/nginx-demo.conf <<'CONF'
server {
listen 8080;
server_name _;
root /var/www/demo-site;
index index.html;
location / {
try_files $uri $uri/ =404;
}
# 反向代理示例：将 /api/* 转发到本地 3000 端口
location /api/ {
proxy_pass http://127.0.0.1:3000/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
CONF
if [ "$os" = "macos" ]; then
sudo cp /tmp/nginx-demo.conf "$cfg_dir/demo.conf"
info "配置文件已写入 $(brew --prefix)/etc/nginx/servers/demo.conf"
elif [ "$os" = "centos" ]; then
sudo cp /tmp/nginx-demo.conf "$cfg_dir/demo.conf"
info "配置文件已写入 ${cfg_dir}/demo.conf"
else
sudo cp /tmp/nginx-demo.conf "$cfg_dir/demo.conf"
sudo rm -f "$cfg_dir/default"
sudo ln -sf "$cfg_dir/demo.conf" "/etc/nginx/sites-enabled/demo.conf"
info "配置文件已写入 ${cfg_dir}/demo.conf（已在 sites-enabled 建立软链接）"
fi
# 创建演示站点根目录
sudo mkdir -p /var/www/demo-site
sudo tee /var/www/demo-site/index.html > /dev/null <<'HTMLEOF'
Nginx Demo
Nginx 示例站点
恭喜！Nginx 已正确配置并运行。
你在浏览器中看到的是 Nginx 直接返回的静态 HTML。
试着访问 /api/test 体验反向代理（需要先启动 3000 端口的后端）。
HTMLEOF
info "演示站点根目录：/var/www/demo-site"
}
start_and_verify() {
step "启动 Nginx 并验证..."
# 语法检查
if ! sudo nginx -t 2>&1; then
error "Nginx 配置语法检查失败！请检查配置文件。"
return 1
fi
info "配置语法检查通过"
# 启动或重载
if command -v brew >/dev/null 2>&1; then
# macOS
brew services stop nginx 2>/dev/null
brew services start nginx
else
# Linux
if systemctl is-active --quiet nginx 2>/dev/null; then
sudo systemctl reload nginx
info "Nginx 已重载"
else
sudo systemctl start nginx
sudo systemctl enable nginx 2>/dev/null || true
info "Nginx 已启动"
fi
fi
sleep 2
# 验证：curl 本机 8080（demo 配置用 8080，避开可能已被占用的 80 端口）
if curl -fsI --max-time 5 "http://127.0.0.1:8080" >/dev/null 2>&1; then
info "验证通过！Nginx 正在 8080 端口监听"
echo ""
echo " 访问 demo 页面： http://127.0.0.1:8080"
echo " 修改配置后记得： sudo nginx -t && sudo systemctl reload nginx"
else
warn "curl 未能连通 8080 端口，Nginx 可能使用了 80 端口（请改为访问 http://127.0.0.1）"
echo " 访问 demo 页面： http://127.0.0.1"
fi
}
main() {
echo "============================================"
echo " Nginx 配置实战 一键脚本"
echo " 适用于 macOS / Linux / WSL"
echo "============================================"
echo ""
local OS NET
OS=$(detect_os)
NET=$(detect_network)
if ! install_nginx "$OS"; then
error "Nginx 安装失败。请先手动安装后再运行本脚本。"
exit 1
fi
generate_config "$OS"
if ! start_and_verify; then
error "启动或验证失败，请按上方提示手动处理。"
exit 1
fi
echo ""
echo "============================================"
info "全部完成！"
echo "============================================"
}
main "$@"