openresty router && template 试用

router 是一个比较方便的 openresty 路由组件，我们可以用来编写灵活强大的 web 应用，类似的
lua-resty-route 也是很不错的，但是如果是比较简单的直接可以使用 lua-resty-template
备注：测试环境使用docker-compose

环境准备

docker-compose 文件

version: "3"
services:
  router:
    build: ./
    volumes:
    - "./nginx_lua/:/opt/app/"
    - "./nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf"
    ports:
    - "8080:80"

nginx.conf
包含了template 以及router 的使用

worker_processes 1;
user root;  
events {
    worker_connections 1024;
}
http {
    include mime.types;
    default_type application/octet-stream;
    sendfile on;
    keepalive_timeout 65;
    lua_code_cache off;
    lua_need_request_body on;
    gzip on;
    resolver 127.0.0.11 ipv6=off;          
    real_ip_header X-Forwarded-For;
    real_ip_recursive on;
    lua_package_path '/opt/app/?.lua;;';
    init_by_lua_block { 
       template = require "resty.template"
     }
    server {
        listen 80;
        server_name localhost;
        charset utf-8;
        default_type text/html;
        location / {
           default_type text/plain;
           content_by_lua_block {
               require("web/init")()
           }
        }
        location /userlogin {
           set $template_root /opt/app/static;
           content_by_lua_block {
               require("web/jquery")();
           }
        }
        location /usercom {
             set $template_root /opt/app/static;
             content_by_lua_block {
               require("web/com")();
             }
        }
        location = /favicon.ico {
            root /opt/app/static;
        }
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root html;
        }

    }
}

dockerfile
安装lua 包

FROM openresty/openresty:alpine-fat
LABEL author="1141591465@qq.com"
RUN /usr/local/openresty/luajit/bin/luarocks install luacheck
RUN /usr/local/openresty/luajit/bin/luarocks install busted
RUN /usr/local/openresty/luajit/bin/luarocks install luacov
RUN /usr/local/openresty/luajit/bin/luarocks install luacov-coveralls
RUN /usr/local/openresty/luajit/bin/luarocks install router
RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-template
EXPOSE 80

router && template 代码

router
nginx_lua/web/init.lua router 的路由编写还是很清晰的，按照http verb 很清晰

local router = require 'router'
function init()
      local r = router.new()
      r:match({
        GET = {
          ["/hello"] = function(params) ngx.print("someone said hello") end,
          ["/hello/:name"] = function(params) ngx.print("hello, " .. params.name) end,
          ["/"] = function(params) ngx.say([[demo app rong]]) end
        },
        POST = {
          ["/app/:id/comments"] = function(params)
            ngx.print("comment " .. params.comment .. " created on app " .. params.id)
          end
        }
      })

      local ok, errmsg = r:execute(
        ngx.var.request_method,
        ngx.var.request_uri,
        ngx.req.get_uri_args(), -- all these parameters
        ngx.req.get_post_args(), -- will be merged in order
        {other_arg = 1}) -- into a single "params" table

      if ok then
        ngx.status = 200
      else
        ngx.status = 404
        ngx.print("Not found!")
        ngx.log(ngx.ERROR, "some wrong")
      end
end
return init

template 代码，这个主要是需要配置几变量，指定模板文件的位置，如下：

location /userlogin {
           set $template_root /opt/app/static;
           content_by_lua_block {
               require("web/jquery")();
           }
}

template render 代码,template 使用了全局变量，在init 阶段初始化

init_by_lua_block { 
       template = require "resty.template"
}

render 处理
nginx_lua/web/juqey.lua

function init()
    template.render(
        "index.html",
        {
            message = "Hello, World!",
            jquery = '<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>'
        }
    )
end
return init

view 模板
nginx_lua/static/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>index page demo</title>
</head>
<body>
    {{message}}
    {*jquery*}
    <script >
        $(document).ready(function(){
            alert("is ok")
        })
    </script>
</body>
</html>

运行效果

启动

docker-compose up -d

路由测试效果
http://localhost:8080/
router:

curl -i http://localhost:8080
HTTP/1.1 200 OK
Server: openresty/1.13.6.2
Date: Thu, 24 Jan 2019 00:29:35 GMT
Content-Type: text/plain; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive

demo app rong

view template:

curl -i http://localhost:8080/userlogin
HTTP/1.1 200 OK
Server: openresty/1.13.6.2
Date: Thu, 24 Jan 2019 00:30:19 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>index page demo</title>
</head>
<body>
    Hello, World!
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
    <script >
        $(document).ready(function(){
            alert("is ok")
        })
    </script>
</body>

说明

openresty 的开发还是很方便的，可以帮助我们解决好多实际中的问题。简单高效

参考资料

https://github.com/rongfengliang/openrety-router-docker-compose
https://github.com/bungle/lua-resty-route
https://github.com/APItools/router.lua
https://github.com/bungle/lua-resty-template