openresty 集成lua-resty-mail +smtp2http 扩展灵活的mail 服务

lua-resty-mail 是一个不错的openresty mail 扩展，我们可以用来进行邮件发送，支持附件功能
smtp2http 是一个smtp 服务，可以将smtp 请求数据转换为http rest 请求，这个在我们的实际应用
中还是很方便的，比如需要mail 服务，但是我们需要进行一些灵活的控制，比如一些devops平台
我们需要监控的报警处理，同时想对于内容进行一些处理
备注： 测试使用openresty + docker-compose 的方式运行,同时使用了一个webhook 的工具

环境准备

• docker-compose 文件

 

version: "3"

services:

  app:

   build: ./

   ports:

   - "8080:80"

   volumes:

   - "./app/:/opt/app/"

   - "./nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf"

  benthos:

    image: jeffail/benthos

    volumes:

    - "./conf/webhook.yaml:/benthos.yaml"

    ports:

    - "4195:4195"

  smtp2http:

    image: uflare/smtp2http

    command: --listen=:25 --webhook=http://benthos:4195/ --strict=false

 

 

• nginx 配置

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;

    gzip on;

    resolver 127.0.0.11;      # 注意dns 的地址    

    real_ip_header X-Forwarded-For;

    real_ip_recursive on;

    lua_package_path '/opt/app/?.lua;;';

    server {

        listen 80;

        server_name localhost;

        charset utf-8;

        root html;

        default_type text/html;

        location / {

           default_type text/html;

           index index.html;

​

        }

        location /mail {

          content_by_lua_block {

            require("mail/init")();

          }

        }

        location /info {

          more_set_headers 'Content-Type application/json';

          content_by_lua_block {

             require("app/init")("dalong","admin");

          }

       }

        error_page 500 502 503 504 /50x.html;

        location = /50x.html {

            root html;

        }

    }

}

 

 

• webhook 配置
  conf/webhook.yaml

 

input:

  type: broker

  broker:

    inputs:

      - type: http_server

        http_server:

          path: /

        processors:

          - type: text

            text:

              operator: prepend

              value: "get email message: "

output:

  type: stdout

 

 

• dockerfile
  安装mail 包

 

FROM openresty/openresty:alpine-fat

LABEL author="1141591465@qq.com"

RUN /usr/local/openresty/luajit/bin/luarocks install lua-rocks-app-project

RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-mail

 

mail 调用代码

参考官方的demo，简单修改几个参数

local mail = require "resty.mail"

function send()

    local mailer, err = mail.new({

        host = "smtp2http",

        port = 25,

        ssl=false,

      })

      if err then

        ngx.log(ngx.ERR, "mail.new error: ", err)

        return ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)

      end

​

      local ok, err = mailer:send({

        from = "dalongrong <rongfl@demo.com>",

        to = { "1141591465@qq.com" },

        subject = "荣锋亮测试!",

        text = "There's pizza in the sewer.",

        html = "<h1>There's pizza in the sewer.</h1>",

      })

      if err then

        ngx.log(ngx.ERR, "mailer:send error: ", err)

        return ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)

      end

end

return send

​

启动&&测试

• 启动

docker-compose up -d

 

• 效果
  使用docker-compose logs -f 查看日志

 

curl -i http://localhost:8080/mail

​

HTTP/1.1 200 OK

Server: openresty/1.13.6.2

Date: Fri, 04 Jan 2019 01:01:56 GMT

Content-Type: text/html; charset=utf-8

Transfer-Encoding: chunked

Connection: keep-alive

 

 

日志信息：

Attaching to openresty-my-luarocks-demo-mail_benthos_1, openresty-my-luarocks-demo-mail_app_1, openresty-my-luarocks-demo-mail_smtp2http_1

benthos_1 | {"@timestamp":"2019-01-04T01:01:29Z","@service":"benthos","level":"INFO","component":"benthos","message":"Launching a benthos instance, use CTRL+C to close."}

benthos_1 | {"@timestamp":"2019-01-04T01:01:29Z","@service":"benthos","level":"INFO","component":"benthos","message":"Listening for HTTP requests at: http://0.0.0.0:4195\n"}

smtp2http_1 | start the smtp server on address: :25

smtp2http_1 | specified maximum body size: 2097152 bytes

smtp2http_1 | specified server name: smtp2http

smtp2http_1 | specified webhook: http://benthos:4195/

smtp2http_1 | validating the incoming FROM header: false

app_1 | 2019/01/04 01:01:29 [alert] 1#1: lua_code_cache is off; this will hurt performance in /usr/local/openresty/nginx/conf/nginx.conf:11

app_1 | nginx: [alert] lua_code_cache is off; this will hurt performance in /usr/local/openresty/nginx/conf/nginx.conf:11

benthos_1 | get email message: addresses%5Bbcc%5D=&addresses%5Bcc%5D=&addresses%5Bfrom%5D=rongfl%40demo.com&addresses%5Bto%5D=1141591465%40qq.com&body%5Bhtml%5D=PGgxPlRoZXJlJ3MgcGl6emEgaW4gdGhlIHNld2VyLjwvaDE%2B&body%5Btext%5D=VGhlcmUncyBwaXp6YSBpbiB0aGUgc2V3ZXIu&id=%3C1546563716.18541b6b1bdaf9deea2f3c73908a2b94e63a432d%40localhost.localdomain%3E&subject=%E8%8D%A3%E9%94%8B%E4%BA%AE%E6%B5%8B%E8%AF%95%21

app_1 | 172.26.0.1 - - [04/Jan/2019:01:01:56 +0000] "GET /mail HTTP/1.1" 200 5 "-" "curl/7.54.0"

 

说明

上边的邮件内容是url+base64编码了的，实际内容可以通过base64 编码的工具处理下就可以了，使用openresty 的mail 模块我们
可以方便的搞好多事情

参考资料

https://github.com/GUI/lua-resty-mail
https://github.com/rongfengliang/openresty_luarocksmodule-demo
https://github.com/Jeffail/benthos
https://github.com/uflare/smtp2http