bus-tracker-backend

This is the backend for the MadridTransporte app.

Features

• Abono data
• Bus locations
• Bus stops times
• Metro stations times

It is written in kotlin using ktor.

How to deploy

I recommend using docker-compose to deploy the backend.

Docker-compose

version: "3.9"
services:
  mongo:
    image: mongo
    restart: always
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: example
  api:
    depends_on:
      - mongo
    environment:
      - SERVICE_JSON= #WRITE HERE YOUR SERVICE JSON, NOT THE FILE PATH, You can get it from https://console.firebase.google.com/u/0/project/YOUR_PROJECT/settings/serviceaccounts/adminsdk
      - MONGO_CONNECTION_STRING= #WRITE HERE YOUR MONGO CONNECTION STRING
      - NOTIFICATION_DELAY_TIME_SECONDS= #WRITE HERE THE DELAY TIME IN SECONDS FOR THE NOTIFICATION SERVICE, DEFAULT IS 60
    image: xbank/bus_tracker_api:latest
  nginx:
    depends_on:
      - api
    image: nginx
    ports:
      - "7777:443"
    volumes:
      - yourNginxConfFilePath:/etc/nginx/conf.d/default.conf #Example below
      - yourPrivateKeyFilePath:/root/ssl/key.pem #You can generate it using letsencrypt
      - yourFullchainFilePath:/root/ssl/cert.pem #You can generate it using letsencrypt
      - yourNginxCacheFolderPath:/data/nginx/cache #You can use a volume to persist cache
    command: [ "nginx", "-g", "daemon off;" ]

Nginx conf example

upstream servers {
    server api:8080 fail_timeout=50s max_fails=5;

    keepalive 2;
}

limit_req_zone $binary_remote_addr zone=one:10m rate=10r/s;
proxy_cache_path /data/nginx/cache keys_zone=mycache:10m levels=1:2 inactive=60m max_size=2g; proxy_cache_key "$scheme$request_method$host$request_uri";

server {
    limit_req zone=one burst=20;
    listen                  443 ssl;
    listen                  [::]:443 ssl;
    server_name             api.server.com; #Your api domain
    ssl_certificate         /root/ssl/cert.pem;
    ssl_certificate_key     /root/ssl/key.pem;
    location / {  
        proxy_cache mycache;
        proxy_cache_methods GET HEAD;
        proxy_http_version 1.1;
        proxy_set_header   "Connection" "";
        add_header X-Proxy-Cache $upstream_cache_status;    
        proxy_pass http://servers;
    }
}

Frontend