nginx.conf

worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  debug;
error_log  /dev/stdout debug;

#pid        logs/nginx.pid;
env NGINX_ENV;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    # See Move default writable paths to a dedicated directory (#119)
    # https://github.com/openresty/docker-openresty/issues/119
    client_body_temp_path /var/run/openresty/nginx-client-body;
    proxy_temp_path       /var/run/openresty/nginx-proxy;
    fastcgi_temp_path     /var/run/openresty/nginx-fastcgi;
    uwsgi_temp_path       /var/run/openresty/nginx-uwsgi;
    scgi_temp_path        /var/run/openresty/nginx-scgi;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;


    server {
      listen 80;

      location /slack {
            resolver 8.8.8.8;
            default_type "application/json";

        content_by_lua_block {
            local cjson = require "cjson"
            local http = require "resty.http"
            local resty_env = require 'resty.env'

            ngx.req.read_body()
            local data = ngx.req.get_body_data()
            local json_table = cjson.decode(data)

            local gitsync_hash = ngx.req.get_headers()['gitsync-hash'] or ''

            local NGINX_ENV = string.upper(resty_env.get('NGINX_ENV'))

            local attachments = {
                {
                    color = "#1d9bd1",
                    fields = {
                        {
                            title = "Airflow Dags (" .. NGINX_ENV .. ") updated",
                            value = "Cluster is updated with <https://github.com/Isaacwhyuenac/openrusty-nginx-lua-send-slack-message|latest dags>",
                        },
                        {
                            title = "Commit",
                            value = gitsync_hash
                        },
                    },
                    mrkdwn_in = {
                        "text"
                    },
                }
            }

            setmetatable(attachments, cjson.array_mt)

            local slack_message = cjson.encode({
                channel = "#alert-data-deploy",
                username = "Airflow Dags Git-Sync Deployer",
                icon_emoji = ":airflow:",
                attachments = attachments,
                env_var = NGINX_ENV
            })

            ngx.status = ngx.HTTP_OK
            ngx.say(slack_message)
        }
      }
    }

    include /etc/nginx/conf.d/*.conf;
}