安装

version: "3"
services:nginx_lua:image: openresty/openresty:alpine#image: openresty/openresty:latest #没有安装opm

以下命令可以在Dockerfile编写, 前缀以RUN补充,使其创建新的镜像
或者在运行后,进容器后直接运行

安装opm

curl -L -o /usr/local/bin/opm https://raw.githubusercontent.com/openresty/opm/master/opm  &&  chmod +x /usr/local/bin/opm

安装基础工具,以避免以下面的报错

apk add --no-cache bash perl  curl
#openresty:alpine版本的包管理工具apk,如使用latest,包管理工具是apt

报错1:
$ opm -h
can’t execute ‘perl’: No such file or directory
报错2:
ERROR: failed to find package: server error: sh: curl: not found

通过opm去查找依赖库

7793bfb21d5b:/# opm search base64
openresty/lua-resty-core                          New FFI-based Lua API for the ngx_lua module
bungle/lua-resty-nettle                           Nettle (a low-level cryptographic library) Bindings for LuaJIT FFI
bungle/lua-resty-session                          Session Library for OpenResty - Flexible and Secure
jprjr/luasodium                                   An FFI binding to libsodium.
GUI/lua-resty-txid                                Generate sortable, unique transaction or request IDs.
xiaocang/lua-resty-openssl                        FFI-based OpenSSL binding for LuaJIT
fffonion/lua-resty-openssl                        FFI-based OpenSSL binding for LuaJIT
fffonion/lua-resty-acme                           Automatic Let's Encrypt certificate serving and Lua implementation of ACME procotol
hamishforbes/lua-resty-consul                     Library to interface with the consul HTTP API
lilien1010/lua-resty-s3uploader                   an http s3 client for openresty
duhoobo/lua-resty-smtp                            A http to smtp bridge library for the ngx_lua module

安装时,需要加上account name

7793bfb21d5b:/# opm install lua-resty-random
ERROR: package name lua-resty-random is not prefixed by an account name.

nginx里使用lua

1. 正常的响应: ngx.say(“Hello, OpenResty!”)
2. 重定向: ngx.redirect(long_url, ngx.HTTP_MOVED_PERMANENTLY)
3. 生成随机数:

	local random_bytes = {}for i = 1, 6 dotable.insert(random_bytes, string.char(math.random(0, 255)))endrandom_bytes = table.concat(random_bytes)

4. Base64编码: ngx.encode_base64(random_bytes)
5. 截取前5个字符: string.sub(encoded_bytes, 1, 5)
6. table将k-v加入res对象: table.insert(result, key … ", " … value)
7. table合并为字符串: table.concat(result, “\n”)

redis相关操作

1. 引入redis

	local redis = require("resty.redis")local red = redis:new()

2. 连接redis

red:connect("192.168.0.xx", 6379)

3. redis写入,并设置key7天过期

	local saved, err = red:setex(key, 604800, long_url)

4. redis读取

	local long_url, err = red:get("code:" .. code)

5. 关闭Redis连接

	local ok, err = red:set_keepalive(10000, 100)

server {listen 80;server_name 0.0.0.0;location / {default_type  text/html;content_by_lua_block {ngx.say("Hello, OpenResty!")}}location /s/ {# 使用Lua模块content_by_lua_block {-- 执行重定向return ngx.redirect("http://example.com", ngx.HTTP_MOVED_PERMANENTLY)}}location /s/create {# 使用Lua模块content_by_lua_block {local redis = require("resty.redis")local red = redis:new()-- 连接到Redis服务器local ok, err = red:connect("192.168.0.xx", 6379)if not ok thenngx.log(ngx.ERR, "Failed to connect to Redis: ", err)return ngx.exit(500)end# ok = 1ngx.log(ngx.INFO, "connect to Redis: ", ok)ngx.say("Hello, OpenResty!")}}}