# 安装前置依赖
sudo apt-get update
sudo apt-get install -y wget gnupg ca-certificates lsb-release

# 添加 OpenResty 官方 APT 仓库
wget -O - https://openresty.org/package/pubkey.gpg | sudo gpg --dearmor -o /usr/share/keyrings/openresty.gpg

echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/openresty.gpg] \
  http://openresty.org/package/ubuntu $(lsb_release -sc) main" \
  | sudo tee /etc/apt/sources.list.d/openresty.list

# 安装 OpenResty
sudo apt-get update
sudo apt-get install -y openresty

# 验证安装
/usr/local/openresty/bin/openresty -v

# 添加 OpenResty 官方 YUM 仓库
sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://openresty.org/package/centos/openresty.repo

# 安装 OpenResty
sudo yum install -y openresty

# 验证
/usr/local/openresty/bin/openresty -v

# 使用 Homebrew
brew install openresty/brew/openresty

# 验证
openresty -v

# 创建工作目录
mkdir -p ~/openresty-build && cd ~/openresty-build

# 下载 OpenResty 源码（以 1.25.3.2 为例）
wget https://openresty.org/download/openresty-1.25.3.2.tar.gz
tar -xzf openresty-1.25.3.2.tar.gz
cd openresty-1.25.3.2

# Ubuntu / Debian
sudo apt-get install -y \
  build-essential \
  libpcre3-dev \
  libssl-dev \
  zlib1g-dev \
  libreadline-dev \
  libncurses5-dev \
  libgd-dev \
  geoip-bin \
  libgeoip-dev

# CentOS / RHEL
sudo yum install -y \
  gcc gcc-c++ make \
  pcre-devel \
  openssl-devel \
  zlib-devel \
  readline-devel \
  ncurses-devel \
  gd-devel \
  GeoIP-devel

./configure \
  --prefix=/usr/local/openresty \
  --with-pcre-jit \
  --with-http_ssl_module \
  --with-http_realip_module \
  --with-http_stub_status_module \
  --with-http_v2_module \
  --with-http_gzip_static_module \
  --with-http_sub_module \
  --with-http_addition_module \
  --with-http_secure_link_module \
  --with-http_image_filter_module \
  --with-luajit \
  --with-stream \
  --with-stream_ssl_module \
  -j4

make -j$(nproc)
sudo make install

# 添加到 ~/.bashrc 或 ~/.zshrc
cat >> ~/.bashrc << 'EOF'
export PATH=/usr/local/openresty/bin:/usr/local/openresty/nginx/sbin:$PATH
export OPENRESTY_PREFIX=/usr/local/openresty
EOF

source ~/.bashrc

# 验证
which openresty
openresty -V  # 注意大写 V 查看编译参数

# /usr/local/openresty/nginx/conf/nginx.conf

worker_processes auto;
error_log logs/error.log info;
pid logs/nginx.pid;

events {
    worker_connections 1024;
}

http {
    # 基本 MIME 类型
    include       mime.types;
    default_type  application/octet-stream;

    # 日志格式
    log_format main '$remote_addr - $remote_user [$time_local] '
                    '"$request" $status $body_bytes_sent '
                    '"$http_referer" "$http_user_agent"';

    access_log logs/access.log main;

    # 性能优化
    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout 65;

    # Lua 模块路径
    lua_package_path "/usr/local/openresty/lualib/?.lua;;";
    lua_package_cpath "/usr/local/openresty/lualib/?.so;;";

    server {
        listen 8080;
        server_name localhost;

        location / {
            default_type text/html;
            content_by_lua_block {
                ngx.say("Hello, OpenResty!")
            }
        }

        # 健康检查端点
        location /health {
            access_log off;
            default_type application/json;
            content_by_lua_block {
                ngx.say('{"status":"ok"}')
            }
        }
    }
}

# 检查配置语法
openresty -t

# 启动
openresty

# 重启（优雅重载配置）
openresty -s reload

# 停止
openresty -s quit   # 优雅停止
openresty -s stop   # 强制停止

# 测试
curl http://localhost:8080/
# 输出: Hello, OpenResty!

-- /usr/local/openresty/lua/test_http.lua
local http = require "resty.http"

local function fetch_url(url)
    local httpc = http.new()
    httpc:set_timeout(5000)  -- 5 秒超时

    local res, err = httpc:request_uri(url, {
        method = "GET",
        headers = {
            ["User-Agent"] = "OpenResty-Gateway/1.0",
        },
    })

    if not res then
        ngx.log(ngx.ERR, "HTTP request failed: ", err)
        return nil, err
    end

    return {
        status = res.status,
        body   = res.body,
        headers = res.headers,
    }
end

-- 在 content 阶段使用
ngx.say(fetch_url("https://httpbin.org/get").body)

local redis = require "resty.redis"

local function get_redis()
    local red = redis:new()
    red:set_timeout(1000)

    local ok, err = red:connect("127.0.0.1", 6379)
    if not ok then
        ngx.log(ngx.ERR, "Redis connect failed: ", err)
        return nil, err
    end

    -- 可选：认证
    -- local ok, err = red:auth("your_password")

    return red
end

local function close_redis(red)
    -- 放回连接池，而非关闭
    local ok, err = red:set_keepalive(10000, 100)
    if not ok then
        ngx.log(ngx.ERR, "Redis set_keepalive failed: ", err)
    end
end

# 查看帮助
opm --help

# 搜索包
opm search lua-resty-http

# 安装包（全局）
sudo opm get openresty/lua-resty-http

# 安装到项目目录
opm --install-dir=./deps get openresty/lua-resty-http

# 列出已安装
opm --install-dir=./deps list

# 升级包
sudo opm update openresty/lua-resty-http

# 添加到 nginx.conf 的 server 块中

location /test-install {
    default_type text/html;
    content_by_lua_block {
        local cjson = require "cjson"
        local http = require "resty.http"

        local result = {
            openresty_version = ngx.var.nginx_version or "unknown",
            lua_version       = jit and jit.version or _VERSION,
            server_time       = ngx.now(),
            worker_pid        = ngx.worker.pid(),
            lua_jit           = jit and "enabled" or "disabled",
        }

        ngx.say(cjson.encode(result))
    }
}

# 测试
curl http://localhost:8080/test-install
# 输出类似: {"openresty_version":"1.25.3.2","lua_version":"LuaJIT 2.1","server_time":1704067200,"worker_pid":12345,"lua_jit":"enabled"}

# 使用 resty 命令行测试 Lua 代码
resty -e 'ngx.say("Hello from resty-cli!")'

# 测试 Lua 库
resty -e 'local cjson = require "cjson"; print(cjson.encode({hello="world"}))'