# 加載Lua模塊
load_module /usr/lib/nginx/modules/ndk_http_module.so;
load_module /usr/lib/nginx/modules/ngx_http_lua_module.so;

http {
    lua_package_path "/usr/local/openresty/lualib/?.lua;;";
    lua_package_cpath "/usr/local/openresty/lualib/?.so;;";
    
    init_by_lua_block {
        require "resty.core"
    }
}

lua_shared_dict rate_limit 100m;

access_by_lua_block {
    local limiter = require "resty.limit.req"
    local limit = limiter.new("rate_limit", 100, 10) -- 100r/s, burst=10
    
    local key = ngx.var.remote_addr
    local delay, err = limit:incoming(key, true)
    
    if not delay then
        ngx.exit(503)
    end
}

header_filter_by_lua_block {
    local ab_test = require "ab_test"
    local variant = ab_test.select_variant(ngx.var.uri, 
                                        ngx.var.remote_addr)
    ngx.header["X-AB-Variant"] = variant
}

content_by_lua_block {
    package.loaded["business_logic"] = nil -- 清除舊模塊
    local logic = require "business_logic"
    logic.process(ngx)
}

http {
    lua_code_cache on;
    lua_jit on;
    lua_jit_max_line 1000;
}

init_by_lua_block {
    local dict = ngx.shared.config_cache
    dict:set("routes", require("routes").get_all())
}

access_by_lua_block {
    local routes = ngx.shared.config_cache:get("routes")
    -- 使用預(yù)加載配置
}

content_by_lua_block {
    local sandbox = require "resty.sandbox"
    local func = assert(loadstring(user_code))
    sandbox.run(func, {
        io = false,
        os = false,
        debug = false
    })
}

lua_max_running_timers 100;
lua_max_pending_timers 100;
lua_socket_connect_timeout 3s;
lua_socket_send_timeout 3s;

access_by_lua_block {
    local acl = require "resty.acl"
    if not acl.check(ngx.var.remote_addr, "lua_exec") then
        ngx.exit(403)
    end
}

header_filter_by_lua_block {
    local debug = ngx.req.get_headers()["X-Debug"]
    if debug == "true" then
        ngx.header["X-Lua-Trace"] = require("jit.util").traceinfo()
    end
}

location /lua_debug {
    content_by_lua_block {
        local mobdebug = require "mobdebug"
        mobdebug.start("debugger.bytedance.com")
        -- 業(yè)務(wù)代碼
        mobdebug.done()
    }
}

# 使用SystemTap分析
stap -e 'probe process("nginx").function("lua_execute") {
    println(ubacktrace())
}'

location / {
    access_by_lua_file /path/to/auth.lua;
    proxy_pass http://backend;
    log_by_lua 'ngx.log(ngx.INFO, "Request completed")';
}

init_worker_by_lua_block {
    local timer = ngx.timer.every
    timer(60, function()
        update_config() -- 每分鐘更新配置
    end)
}

balancer_by_lua_block {
    local balancer = require "ngx.balancer"
    local host = service_mesh.get_upstream(ngx.var.service_name)
    balancer.set_current_peer(host.ip, host.port)
}