# -*- coding: utf-8 -*-
# vim: syntax=nginx tabstop=4 shiftwidth=4 softtabstop=4
#
# BITE - A Basic/IoT/Example
# Copyright (C) 2020-2021 Daniele Viganò <daniele@vigano.me>
#
# BITE is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# BITE is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

user  nginx;
worker_processes  auto;

error_log  /dev/stdout warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/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  /dev/stdout  main;

    sendfile        on;
    keepalive_timeout  65;
    gzip  off;

    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    upstream django {
        # We point to the Docker 'service' instead of directly to the container
        # Docker does then a DNS round-robin internally
        server bite:8000;
    }

    upstream mqtt {
        # We point to the Docker 'service' instead of directly to the container
        # Docker does then a DNS round-robin internally
        server broker:9001;
    }

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;

        keepalive_requests    10;
        keepalive_timeout     60 60;
    
        location / {
            proxy_pass           http://django;
            proxy_http_version   1.1;
            proxy_set_header     Host               $http_host;
            proxy_set_header     X-Real-IP          $remote_addr;
            proxy_set_header     X-Forwarded-Host   $host:$server_port;
            proxy_set_header     X-Forwarded-Server $host;
            proxy_set_header     X-Forwarded-For    $proxy_add_x_forwarded_for;
    
            proxy_read_timeout      300;
            proxy_connect_timeout   300;

            ## !- This is mandatory for IoT that do not wait for a reply -! ##
            proxy_ignore_client_abort on;
        }

        location /mqtt {
            proxy_pass           http://mqtt;
            proxy_http_version   1.1;
            proxy_set_header     Upgrade            $http_upgrade;
            proxy_set_header     Connection         $connection_upgrade;
        }

        location /static/ {
            root   /srv/appdata/bite;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    } 
}