part 12 done

Pt12/part12-containers-applications/todo-app/todo-backend/.gitignore

@@ -0,0 +1,61 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# next.js build output
+.next

Pt12/part12-containers-applications/todo-app/todo-backend/Dockerfile

@@ -0,0 +1,15 @@
+FROM node:20
+  
+WORKDIR /usr/src/app
+
+
+COPY --chown=node:node . .
+
+RUN npm ci 
+
+ENV DEBUG=express:*
+  
+
+USER node
+
+CMD npm start

Pt12/part12-containers-applications/todo-app/todo-backend/README.md

@@ -0,0 +1,19 @@
+# Express application
+
+Install dependencies with `npm install`
+
+Run with `npm start`
+
+Or in development mode with `npm run dev`
+
+# Visit counter
+
+When running the server, visit http://localhost:3000 to see visit counter, or give environment variable `PORT` to change the port.
+
+# MongoDB
+
+The application has /todos crud which requires a MongoDB. Pass connection url with env `MONGO_URL`
+
+# Redis
+
+Pass connection url with env `REDIS_URL`

Pt12/part12-containers-applications/todo-app/todo-backend/app.js

@@ -0,0 +1,20 @@
+const express = require("express");
+const logger = require("morgan");
+const cors = require("cors");
+
+const indexRouter = require("./routes/index");
+const todosRouter = require("./routes/todos");
+const statisticsRouter = require("./routes/statistics");
+
+const app = express();
+
+app.use(cors());
+
+app.use(logger("dev"));
+app.use(express.json());
+
+app.use("/", indexRouter);
+app.use("/todos", todosRouter);
+app.use("/statistics", statisticsRouter);
+
+module.exports = app;

Pt12/part12-containers-applications/todo-app/todo-backend/bin/www

@@ -0,0 +1,89 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+var app = require('../app');
+var debug = require('debug')('todo-express-backend:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

Pt12/part12-containers-applications/todo-app/todo-backend/dev.Dockerfile

@@ -0,0 +1,15 @@
+FROM node:20
+  
+WORKDIR /usr/src/app
+
+
+COPY --chown=node:node . .
+
+RUN npm i 
+
+ENV DEBUG=express:*
+  
+
+USER node
+
+CMD ["npm", "run", "dev", "--", "--host"]

Pt12/part12-containers-applications/todo-app/todo-backend/docker-compose.dev.yml

@@ -0,0 +1,38 @@
+services:
+  server:
+    image: todo-backend-dev
+    build:
+      context: .
+      dockerfile: dev.Dockerfile
+    volumes:
+      - ./:/usr/src/app
+    ports: 
+      - 3000:3000
+    environment:
+      REDIS_URL: "redis://redis:6379"
+      MONGO_URL: "mongodb://the_username:the_password@mongo:27017/the_database"
+
+  mongo:
+    image: mongo
+    ports:
+     - 3456:27017
+    environment:
+      MONGO_INITDB_ROOT_USERNAME: root
+      MONGO_INITDB_ROOT_PASSWORD: example
+      MONGO_INITDB_DATABASE: the_database
+    volumes:
+      - ./mongo/mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js
+      - mongo_data:/data/db
+
+  redis:
+    image: redis
+    ports:
+      - 3457:6379
+    # Everything else
+    command: ['redis-server', '--appendonly', 'yes'] # Overwrite the CMD
+    volumes: # Declare the volume
+      - ./redis_data:/data
+
+volumes:
+  mongo_data:
+

Pt12/part12-containers-applications/todo-app/todo-backend/docker-compose.yml

@@ -0,0 +1,6 @@
+services:
+  app:                    # The name of the service, can be anything
+    image: todo-backend # Declares which image to use
+    build: .              # Declares where to build if image is not found
+    ports:                # Declares the ports to publish
+      - 3000:3000

Pt12/part12-containers-applications/todo-app/todo-backend/mongo/index.js

@@ -0,0 +1,10 @@
+const mongoose = require('mongoose')
+const Todo = require('./models/Todo')
+const { MONGO_URL } = require('../util/config')
+
+if (MONGO_URL && !mongoose.connection.readyState) mongoose.connect(MONGO_URL, { useNewUrlParser: true, useUnifiedTopology: true })
+
+
+module.exports = {
+  Todo
+}

Pt12/part12-containers-applications/todo-app/todo-backend/mongo/models/Todo.js

@@ -0,0 +1,8 @@
+const mongoose = require('mongoose')
+
+const todoSchema = new mongoose.Schema({
+  text: String,
+  done: Boolean
+})
+
+module.exports = mongoose.model('Todo', todoSchema)

Pt12/part12-containers-applications/todo-app/todo-backend/mongo/mongo-init.js

@@ -0,0 +1,15 @@
+db.createUser({
+  user: 'the_username',
+  pwd: 'the_password',
+  roles: [
+    {
+      role: 'dbOwner',
+      db: 'the_database',
+    },
+  ],
+});
+
+db.createCollection('todos');
+
+db.todos.insert({ text: 'Write code', done: true });
+db.todos.insert({ text: 'Learn about containers', done: false });

Pt12/part12-containers-applications/todo-app/todo-backend/mongo_data/WiredTiger

@@ -0,0 +1,2 @@
+WiredTiger
+WiredTiger 11.2.0: (November 10, 2022)

Pt12/part12-containers-applications/todo-app/todo-backend/mongo_data/WiredTiger.lock

@@ -0,0 +1 @@
+WiredTiger lock file

Pt12/part12-containers-applications/todo-app/todo-backend/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "todo-express-backend",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www",
+    "dev": "nodemon ./bin/www"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "debug": "~2.6.9",
+    "express": "~4.16.1",
+    "mongoose": "^5.13.2",
+    "morgan": "~1.9.1",
+    "redis": "^3.1.2"
+  },
+  "devDependencies": {
+    "nodemon": "^2.0.12"
+  }
+}

Pt12/part12-containers-applications/todo-app/todo-backend/redis/index.js

@@ -0,0 +1,27 @@
+const redis = require('redis')
+const { promisify } = require('util')
+const { REDIS_URL } = require('../util/config')
+
+let getAsync
+let setAsync
+
+if (!REDIS_URL) {
+  const redisIsDisabled = () => {
+    console.log('No REDIS_URL set, Redis is disabled')
+    return null
+  }
+  getAsync = redisIsDisabled
+  setAsync = redisIsDisabled
+} else {
+  const client = redis.createClient({
+    url: REDIS_URL
+  })
+    
+  getAsync = promisify(client.get).bind(client)
+  setAsync = promisify(client.set).bind(client)    
+}
+
+module.exports = {
+  getAsync,
+  setAsync
+}

Pt12/part12-containers-applications/todo-app/todo-backend/redis_data/appendonlydir/appendonly.aof.1.incr.aof

@@ -0,0 +1,36 @@
+*2
+$6
+SELECT
+$1
+0
+*3
+$3
+set
+$11
+added_todos
+$1
+1
+*2
+$6
+SELECT
+$1
+0
+*3
+$3
+set
+$11
+added_todos
+$1
+2
+*2
+$6
+SELECT
+$1
+0
+*3
+$3
+set
+$11
+added_todos
+$1
+3

Pt12/part12-containers-applications/todo-app/todo-backend/redis_data/appendonlydir/appendonly.aof.manifest

@@ -0,0 +1,2 @@
+file appendonly.aof.1.base.rdb seq 1 type b
+file appendonly.aof.1.incr.aof seq 1 type i

Pt12/part12-containers-applications/todo-app/todo-backend/routes/index.js

@@ -0,0 +1,19 @@
+const express = require("express");
+const router = express.Router();
+const redis = require("../redis");
+
+const configs = require("../util/config");
+
+let visits = 0;
+
+/* GET index data. */
+router.get("/", async (req, res) => {
+  visits++;
+
+  res.send({
+    ...configs,
+    visits,
+  });
+});
+
+module.exports = router;

Pt12/part12-containers-applications/todo-app/todo-backend/routes/statistics.js

@@ -0,0 +1,11 @@
+const express = require("express");
+const router = express.Router();
+const { getAsync } = require("../redis/index");
+
+/* GET todos listing. */
+router.get("/", async (_, res) => {
+  const statistics = await getAsync("added_todos");
+  res.send(statistics);
+});
+
+module.exports = router;

Pt12/part12-containers-applications/todo-app/todo-backend/routes/todos.js

@@ -0,0 +1,54 @@
+const express = require("express");
+const { Todo } = require("../mongo");
+const router = express.Router();
+const { getAsync, setAsync } = require("../redis/index");
+
+/* GET todos listing. */
+router.get("/", async (_, res) => {
+  const todos = await Todo.find({});
+  res.send(todos);
+});
+
+/* POST todo to listing. */
+router.post("/", async (req, res) => {
+  const todo = await Todo.create({
+    text: req.body.text,
+    done: false,
+  });
+  const todoCounter = await getAsync("added_todos");
+  setAsync("added_todos", Number(todoCounter) + 1);
+  res.send(todo);
+});
+
+const singleRouter = express.Router();
+
+const findByIdMiddleware = async (req, res, next) => {
+  const { id } = req.params;
+  req.todo = await Todo.findById(id);
+  if (!req.todo) return res.sendStatus(404);
+
+  next();
+};
+
+/* DELETE todo. */
+singleRouter.delete("/", async (req, res) => {
+  await req.todo.delete();
+  res.sendStatus(200);
+});
+
+/* GET todo. */
+singleRouter.get("/", async (req, res) => {
+  res.send(req.todo);
+});
+
+/* PUT todo. */
+singleRouter.put("/", async (req, res) => {
+  const todo = await Todo.findByIdAndUpdate(req.todo._id, {
+    done: true,
+  });
+  res.send(todo);
+});
+
+router.use("/:id", findByIdMiddleware, singleRouter);
+
+module.exports = router;

Pt12/part12-containers-applications/todo-app/todo-backend/util/config.js

@@ -0,0 +1,7 @@
+const MONGO_URL = process.env.MONGO_URL || undefined
+const REDIS_URL = process.env.REDIS_URL || undefined
+
+module.exports = {
+  MONGO_URL,//: 'mongodb://the_username:the_password@localhost:3456/the_database',
+  REDIS_URL//: '//localhost:6378'
+}