Openresty/openresty-resty-module.md · Andy/lua-nginx-redis

lua-resty-redis 扩展 (是openresty下操作redis的模块)

代码引入：lua_package_path "/opt/openresty/nginx/lua/lua-resty-redis/lib/?.lua;;";

Lua脚本实现一个CDN的反向代理功能(智能查找CDN节点)(测试成功,可上线)

nginx.conf 配置信息

http {
    lua_package_path "/opt/openresty/nginx/lua/lua-resty-redis/lib/?.lua;;";
    server {
        listen 80;
        server_name  localhost;
        location ~ \/.+\/.+\.(m3u8|ts) {
            if ($uri ~ \/([a-zA-Z0-9]+)\/([a-zA-Z0-9]+)(|-).*\.(m3u8|ts)) {
                    set $app_name $1;
                    set $a $2;
            }
            set $stream_id "";
            default_type 'text/html';
            rewrite_by_lua_file  /opt/openresty/nginx/lua/proxy_pass_cdn.lua;
            proxy_connect_timeout       10;
            proxy_send_timeout          30;
            proxy_read_timeout          30;
            proxy_pass                  $stream_id;
        }

    }
}

Lua脚本结合 Nginx+Lua+Local Redis+Mysql服务器缓存

Nginx+Lua+Local Redis+Mysql集群架构
Lua脚本Nginx+Lua+Redis+Mysql.lua
Nginx.conf配置文件Nginx+Lua+Redis+Mysql.conf
HELP

Lua脚本结合 Redis 统计直播流播放次数、链接次数等等信息

nginx.conf

server {            # 配置虚拟服务器80
     listen 80;
     server_name  127.0.0.1:8088;
     location ~* /live/(\w+)/ {
            set $total_numbers "";
            set $stream_name $1;
            lua_code_cache off;
            rewrite_by_lua_file /opt/openresty/nginx/conf/Lua/total_numbers.lua;
            proxy_pass                  http://127.0.0.1:8088;
      }
}

代理服务器

 server {            # 配置虚拟服务器8088
     listen 8088;
     server_name  127.0.0.1:8088;
     location /live {
        add_header  Cache-Control no-cache;
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
        add_header 'Access-Control-Allow-Headers' 'Range';
        types{
            application/dash+xml mpd;
            application/vnd.apple.mpegurl m3u8;
            video/mp2t ts;
        }
     alias /home/tinywan/HLS/live/;
    }
  }

CURL请求地址：http://192.168.18.143/live/tinywan123/index.m3u8
Lua 脚本

lua-resty-websocket 扩展

代码引入：lua_package_path "/opt/openresty/nginx/lua/lua-resty-websocket/lib/?.lua;;";

Lua脚本实现一个websocket连接(测试成功,可上线)

nginx.conf 配置信息

http {
        lua_package_path "/opt/openresty/nginx/lua/lua-resty-websocket/lib/?.lua;;";
        server {
            listen 80 so_keepalive=2s:2s:8;  #为了防止半开TCP连接，最好在Nginx监听配置指令中启用TCP keepalive：
            server_name  localhost;
            location /ws {
                lua_socket_log_errors off;
                lua_check_client_abort on;
                lua_code_cache off; # 建议测试的时候最好关闭缓存
                content_by_lua_file /opt/openresty/nginx/conf/Lua/websocket.lua;
            }
        }
}

WebSockets服务器Lua脚本websocket.lua
websockets.html客户端代码,代码路径：/usr/local/openresty/nginx/html
然后打开启用了WebSocket支持的浏览器，然后打开以下url：

lua-cjson 扩展

基本用法

nginx.conf

location /cjson {
    content_by_lua_block {
        local cjson = require "cjson"
        local json = cjson.encode({
                foo = "bar",
                some_object = {},
                some_array = cjson.empty_array
        })
        ngx.say(json)
    }
}

curl 请求

root@tinywan:/opt/openresty/nginx/conf# curl http://127.0.0.1/cjson
{"some_object":{"tel":13669313112,"age":24},"name":"tinywan","some_array":[]}

lua对象到字符串、字符串到lua对象

lua-resty-session 扩展

OpenResty 引用第三方 resty 库非常简单，只需要将相应的文件拷贝到 resty 目录下即可
我服务器OpenResty 的 resty 路径：/opt/openresty/lualib/resty

下载第三方 resty 库：git clone lua-resty-session 文件路径以及内容：

tinywan@tinywan:/opt/openresty/nginx/lua/lua-resty-session/lib/resty$ ls
session  session.lua

特别注意：这里拷贝的时候要要把session文件和session.lua 文件同时吧、拷贝过去，否则会报错误：

/opt/openresty/lualib/resty/session.lua:34: in function 'prequire'
/opt/openresty/lualib/resty/session.lua:211: in function 'new'
/opt/openresty/lualib/resty/session.lua:257: in function 'open'
/opt/openresty/lualib/resty/session.lua:320: in function 'start'

拷贝完毕后/opt/openresty/lualib/resty OpenResty 引用第三方 resty 的所有库文件

tinywan@tinywan:/opt/openresty/lualib/resty$ ls
aes.lua  core.lua  http_headers.lua  lock.lua  lrucache.lua  memcached.lua  random.lua  session      sha1.lua    sha256.lua  sha512.lua  string.lua  upstream
core     dns       http.lua          lrucache  md5.lua       mysql.lua      redis.lua   session.lua  sha224.lua  sha384.lua  sha.lua     upload.lua  websocket

基本用法

 location /start {
    content_by_lua_block {
        local session = require "resty.session".start()
        session.data.name = "OpenResty Fan Tinywan"
        session:save()
        ngx.say("<html><body>Session started. ",
                "<a href=/test>Check if it is working</a>!</body></html>")
        ngx.say(session.data.name,"Anonymous")
    }
 }

curl 请求

tinywan@tinywan:/opt/openresty/nginx/conf$ curl http://192.168.18.143/start
<html><body>Session started. <a href=/test>Check if it is working</a>!</body></html>
OpenResty Fan Tinywan Anonymous

Lua 权限验证

Lua 一个HLS的简单地址访问权限验证

Nginx.conf 配置

location ^~ /live/ {
    add_header Cache-Control no-cache;
    add_header 'Access-Control-Allow-Origin' '*' always;
    add_header 'Access-Control-Allow-Credentials' 'true';
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
    add_header 'Access-Control-Allow-Headers' 'Range';

    types{
        application/dash+xml mpd;
        application/vnd.apple.mpegurl m3u8;
        video/mp2t ts;
    }
    if ( $uri ~ \.m3u8 ) {
        lua_code_cache off;
        access_by_lua_file /opt/openresty/nginx/lua/access.lua;
    }
    root /home/tinywan/HLS;
 }

access.lua 文件内容

if ngx.req.get_uri_args()["wsSecret"] ~= "e65e6a01cf26523e206d5bb0e2a8a95a" then  
   return ngx.exit(403)  
end

lua-resty-string 扩展

MD5加密的简单基本用法 md5.lua

local resty_md5 = require "resty.md5"
local md5 = resty_md5:new()
if not md5 then
    ngx.say("failed to create md5 object")
    return
end
local ok = md5:update("hello")
if not ok then
    ngx.say("failed to add data")
    return
end
local digest = md5:final()
-- ngx.say("md5",digest)                ---注意:这样直接输出是乱码
local str = require "resty.string"
ngx.say("md5: ", str.to_hex(digest))    ---注意:必须通过字符串转码方可打印输出
    -- yield "md5: 5d41402abc4b2a76b9719d911017c592"

openresty扫描代码全局变量

在OpenResty中需要避免全局变量的使用，为此春哥写了一个perl工具，可以扫描openresty lua代码的全局变量
https://github.com/openresty/openresty-devel-utils/blob/master/lua-releng
用法相当简单
1. 将代码保存成lua-releng文件
2. 更改lua-releng的权限，chmod 777 lua-releng
3. 假设有一个源码文件为test.lua
4. 执行./lua-releng test.lua，则会扫描test.lua文件的全局变量，并在屏幕打印结果

Andy / lua-nginx-redis

lua-resty-redis 扩展 (是openresty下操作redis的模块)

lua-resty-websocket 扩展

lua-cjson 扩展

lua-resty-session 扩展

Lua 权限验证

lua-resty-string 扩展

lua-resty-http 扩展（ngx_lua的HTTP客户端cosocket驱动程序）

lua-resty-mysql 扩展

srcache-nginx-module 扩展 (nginx下的一个缓存模块)

openresty扫描代码全局变量

简介

发行版

贡献者

近期动态

Andy / lua-nginx-redis .gitee-modal { width: 500px !important; }

lua-resty-redis 扩展 (是openresty下操作redis的模块)

lua-resty-websocket 扩展

lua-cjson 扩展

lua-resty-session 扩展

Lua 权限验证

lua-resty-string 扩展

lua-resty-http 扩展 （ngx_lua的HTTP客户端cosocket驱动程序）

lua-resty-mysql 扩展

srcache-nginx-module 扩展 (nginx下的一个缓存模块)

openresty扫描代码全局变量

简介

发行版

贡献者

近期动态

搜索帮助

Andy / lua-nginx-redis

lua-resty-http 扩展（ngx_lua的HTTP客户端cosocket驱动程序）