commit 5e5aff990da347fd2f64d6279b3e2efaccba1e28 Author: Roman Siverov Date: Thu Jun 4 14:11:13 2026 +0300 initial commit diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..76add87 --- /dev/null +++ b/.dockerignore @@ -0,0 +1,2 @@ +node_modules +dist \ No newline at end of file diff --git a/.env b/.env new file mode 100644 index 0000000..adf85f1 --- /dev/null +++ b/.env @@ -0,0 +1,9 @@ +# Этот файл содержит переменные окружения для локального запуска. +# Реальные пароли и другие секреты заменяются при развертывании. + +POSTGRES_HOST=postgres +POSTGRES_PORT=5432 +POSTGRES_DB=motd +POSTGRES_USER=user +POSTGRES_PASSWORD=super_secure_password +REDIS_URL=redis://redis:6379 \ No newline at end of file diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a990ae5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +node_modules +.npmrc +.ssl/ca +.ssl/certs +dist/ \ No newline at end of file diff --git a/.ssl/gen-ca.sh b/.ssl/gen-ca.sh new file mode 100755 index 0000000..005ba04 --- /dev/null +++ b/.ssl/gen-ca.sh @@ -0,0 +1,42 @@ +#!/usr/bin/env sh +set -euo pipefail + +CA_DIR="${CA_DIR:-$(dirname $0)/ca}" +CA_KEY="${CA_DIR}/ca.key" +CA_CERT="${CA_DIR}/ca.pem" + +CA_SUBJECT="${CA_SUBJECT:-/C=UZ/O=Local CA/CN=Local Root CA}" +CA_DAYS="${CA_DAYS:-3650}" +CA_KEY_BITS="${CA_KEY_BITS:-4096}" + +mkdir -p "${CA_DIR}" +chmod 700 "${CA_DIR}" + +if [[ -f "${CA_KEY}" || -f "${CA_CERT}" ]]; then + echo "CA already exists:" + echo " ${CA_KEY}" + echo " ${CA_CERT}" + echo "Nothing to do." + exit 0 +fi + +openssl genrsa -out "${CA_KEY}" "${CA_KEY_BITS}" +chmod 600 "${CA_KEY}" + +openssl req \ + -x509 \ + -new \ + -nodes \ + -key "${CA_KEY}" \ + -sha256 \ + -days "${CA_DAYS}" \ + -subj "${CA_SUBJECT}" \ + -out "${CA_CERT}" + +chmod 644 "${CA_CERT}" + +echo "CA created:" +echo " key: ${CA_KEY}" +echo " cert: ${CA_CERT}" + +openssl x509 -in "${CA_CERT}" -noout -subject -issuer -dates \ No newline at end of file diff --git a/.ssl/gen-cert.sh b/.ssl/gen-cert.sh new file mode 100755 index 0000000..59406cd --- /dev/null +++ b/.ssl/gen-cert.sh @@ -0,0 +1,116 @@ +#!/bin/sh +set -eu + +CA_DIR="${CA_DIR:-$(dirname $0)/ca}" +CERTS_DIR="${CERTS_DIR:-$(dirname $0)/certs}" + +CA_KEY="${CA_DIR}/ca.key" +CA_CERT="${CA_DIR}/ca.pem" + +NAME="${1:-}" +DAYS="${DAYS:-825}" +KEY_BITS="${KEY_BITS:-2048}" + +if [ -z "${NAME}" ]; then + echo "Usage:" + echo " $0 [san1 san2 ...]" + echo + echo "Examples:" + echo " $0 api.local api.local localhost 127.0.0.1" + echo " $0 client-1" + exit 1 +fi + +if [ ! -f "${CA_KEY}" ] || [ ! -f "${CA_CERT}" ]; then + echo "CA files not found. Run gen-ca.sh first." + exit 1 +fi + +shift || true + +if [ -e "${CERTS_DIR}/${NAME}" ]; then + echo "Certificate for ${NAME} already exists." + echo "Nothing to do." + exit 0 +fi + +mkdir -p "${CERTS_DIR}/${NAME}" + +KEY="${CERTS_DIR}/${NAME}/${NAME}.key.pem" +CSR="${CERTS_DIR}/${NAME}/${NAME}.csr.pem" +CERT="${CERTS_DIR}/${NAME}/${NAME}.cert.pem" +EXT="${CERTS_DIR}/${NAME}/${NAME}.ext.cnf" +FULLCHAIN="${CERTS_DIR}/${NAME}/${NAME}.fullchain.pem" + +SUBJECT="${SUBJECT:-/C=US/O=Localhost LLC/CN=${NAME}}" + +cat > "${EXT}" <> "${EXT}" + ;; + *.*.*.*) + echo "IP.${i} = ${san}" >> "${EXT}" + ;; + *) + echo "DNS.${i} = ${san}" >> "${EXT}" + ;; + esac + i=$((i + 1)) + done +else + echo "DNS.1 = ${NAME}" >> "${EXT}" +fi + +openssl genrsa -out "${KEY}" "${KEY_BITS}" +chmod 600 "${KEY}" + +openssl req \ + -new \ + -key "${KEY}" \ + -subj "${SUBJECT}" \ + -out "${CSR}" + +openssl x509 \ + -req \ + -in "${CSR}" \ + -CA "${CA_CERT}" \ + -CAkey "${CA_KEY}" \ + -CAcreateserial \ + -out "${CERT}" \ + -days "${DAYS}" \ + -sha256 \ + -extfile "${EXT}" \ + -extensions v3_req + +cat "${CERT}" "${CA_CERT}" > "${FULLCHAIN}" + +chmod 644 "${CSR}" "${CERT}" "${EXT}" "${FULLCHAIN}" + +echo "Certificate issued:" +echo " key: ${KEY}" +echo " csr: ${CSR}" +echo " cert: ${CERT}" +echo " fullchain: ${FULLCHAIN}" + +openssl x509 -in "${CERT}" -noout -subject -issuer -dates -ext subjectAltName \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..72136bd --- /dev/null +++ b/Dockerfile @@ -0,0 +1,23 @@ +# --- Stage 1: Build --- +FROM node:22.22-alpine AS build + +WORKDIR /app + +RUN corepack enable + +COPY . . +RUN pnpm install --frozen-lockfile + +RUN pnpm build + +# --- Stage 2: Run --- +FROM node:22.22-alpine AS runtime +WORKDIR /app + +COPY --from=build /app/dist ./dist +COPY --from=build /app/node_modules ./node_modules +COPY --from=build /app/package.json ./package.json + +EXPOSE 3000 + +CMD ["node", "dist/index.js"] \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..c48f924 --- /dev/null +++ b/README.md @@ -0,0 +1,54 @@ +# Simple MOTD Web App +Простенькое MOTD бекенд-приложение на веб-технологиях. + +Предназначено для получения, передачи и сохранения MOTD (Message-of-the-Day). + +## Стек + +Приложение и обвязка написаны на скорую руку, примерно за час. **Нюансы**: +- И базы, и приложение, и балансировщик записаны в одной композиции +- .env файл используется как для приложения, так и для контейнера с базой данных +- Генерация CA + пары сертификат-ключ происходят при сборке контейнера с приложением, один раз. При пересборке используются уже существующие сертификаты - в CI их можно подсунуть перед сборкой. +- Само приложение (только приложение - директория `src/`) сгенерировано нейронкой +- Никакого CI/CD + +Чтобы этих нюансов не было - полагается трудоустройство, делать что-то полноценное за бесплатно я не собираюсь. + +Стек включает в себя: +- Nginx +- PostgreSQL +- Redis +- Node.js (TypeScript) + +## Сборка и запуск + +Требования: +- Подключение к интернету +- Незанятый порт 443 +- Docker + +1. Выполним команды: + ```bash + docker run --rm -v ./.ssl:/ssl --entrypoint /bin/sh alpine/openssl -c "/ssl/gen-ca.sh && /ssl/gen-cert.sh localhost" + docker compose build + docker compose up -d + ``` +2. Перейдём к разделу [Использование](#использование). + +## Использование + +Получить MOTD: +```bash +curl -k https://localhost/motd +``` + +Установить MOTD: +```bash +curl -k -X POST https://localhost/motd \ + -H "Content-Type: application/json" \ + -d '{"message":"Hello from MOTD app"}' +``` + +## P.S. +Честно говоря, тестовые задания - это развод гоев на бесплатную рабочую силу, сомнительные конторы их очень любят.
+В вашем случае я хотя бы увидел живого человека - обычно своё время на такое я не трачу. \ No newline at end of file diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..2c30a86 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,63 @@ +services: + postgres: + image: postgres:16 + container_name: motd-postgres + env_file: .env + healthcheck: + test: ["CMD-SHELL", "pg_isready"] + interval: 10s + timeout: 5s + retries: 15 + ports: + - '5432:5432' + volumes: + - postgres_data:/var/lib/postgresql/data + + redis: + image: redis:7 + container_name: motd-redis + healthcheck: + test: [ "CMD", "redis-cli", "--raw", "incr", "ping" ] + interval: 10s + timeout: 5s + retries: 15 + ports: + - '6379:6379' + + app: + image: artifacts.siverov.com/library/motd-web-app + build: . + env_file: .env + container_name: motd-app + depends_on: + postgres: + condition: service_healthy + redis: + condition: service_healthy + healthcheck: + test: [ "CMD", "nc", "-vz", "::1", "3000" ] + interval: 10s + timeout: 5s + retries: 15 + + nginx: + image: nginx:1.27-alpine + container_name: motd-nginx + ports: + - '80:80' + - '443:443' + depends_on: + app: + condition: service_started + volumes: + - ./nginx.conf:/etc/nginx/conf.d/default.conf + - ./.ssl/certs:/etc/nginx/certs:ro + healthcheck: + test: [ "CMD", "nc", "-vz", "::1", "80" ] + interval: 10s + timeout: 5s + retries: 15 + + +volumes: + postgres_data: {} \ No newline at end of file diff --git a/nginx.conf b/nginx.conf new file mode 100644 index 0000000..98d26b5 --- /dev/null +++ b/nginx.conf @@ -0,0 +1,25 @@ +limit_req_zone $binary_remote_addr zone=per_ip:10m rate=10r/s; + +server { + listen 80; + listen [::]:80; + listen 443 ssl; + listen [::]:443 ssl; + + ssl_certificate /etc/nginx/certs/localhost/localhost.cert.pem; + ssl_certificate_key /etc/nginx/certs/localhost/localhost.key.pem; + ssl_trusted_certificate /etc/nginx/certs/localhost/localhost.fullchain.pem; + + client_max_body_size 10m; + + location / { + proxy_pass http://app:3000; + + limit_req zone=per_ip nodelay; + + proxy_set_header Host $host; + proxy_set_header X-Real-IP $remote_addr; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_set_header X-Forwarded-Proto $scheme; + } +} \ No newline at end of file diff --git a/package.json b/package.json new file mode 100644 index 0000000..37036d3 --- /dev/null +++ b/package.json @@ -0,0 +1,26 @@ +{ + "name": "motd-app", + "version": "1.0.0", + "description": "Simple MOTD app with TypeScript, Redis, and Postgres", + "author": "Roman Siverov", + "main": "dist/index.js", + "scripts": { + "build": "tsc", + "start": "node dist/index.js", + "dev": "tsx src/index.ts" + }, + "dependencies": { + "dotenv": "^16.4.5", + "express": "^4.19.2", + "pg": "^8.12.0", + "redis": "^4.6.14" + }, + "devDependencies": { + "@types/express": "^5.0.0", + "@types/node": "^22.7.4", + "@types/pg": "^8.20.0", + "tsx": "^4.19.1", + "typescript": "^5.6.2" + }, + "packageManager": "pnpm@10.32.1" 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1.1.0(@redis/client@1.6.1) + + safe-buffer@5.2.1: {} + + safer-buffer@2.1.2: {} + + send@0.19.2: + dependencies: + debug: 2.6.9 + depd: 2.0.0 + destroy: 1.2.0 + encodeurl: 2.0.0 + escape-html: 1.0.3 + etag: 1.8.1 + fresh: 0.5.2 + http-errors: 2.0.1 + mime: 1.6.0 + ms: 2.1.3 + on-finished: 2.4.1 + range-parser: 1.2.1 + statuses: 2.0.2 + transitivePeerDependencies: + - supports-color + + serve-static@1.16.3: + dependencies: + encodeurl: 2.0.0 + escape-html: 1.0.3 + parseurl: 1.3.3 + send: 0.19.2 + transitivePeerDependencies: + - supports-color + + setprototypeof@1.2.0: {} + + side-channel-list@1.0.1: + dependencies: + es-errors: 1.3.0 + object-inspect: 1.13.4 + + side-channel-map@1.0.1: + dependencies: + call-bound: 1.0.4 + es-errors: 1.3.0 + get-intrinsic: 1.3.1 + object-inspect: 1.13.4 + + side-channel-weakmap@1.0.2: + dependencies: + call-bound: 1.0.4 + es-errors: 1.3.0 + get-intrinsic: 1.3.1 + object-inspect: 1.13.4 + side-channel-map: 1.0.1 + + side-channel@1.1.0: + dependencies: + es-errors: 1.3.0 + object-inspect: 1.13.4 + side-channel-list: 1.0.1 + side-channel-map: 1.0.1 + side-channel-weakmap: 1.0.2 + + split2@4.2.0: {} + + statuses@2.0.2: {} + + toidentifier@1.0.1: {} + + tsx@4.22.4: + dependencies: + esbuild: 0.28.0 + optionalDependencies: + fsevents: 2.3.3 + + type-is@1.6.18: + dependencies: + media-typer: 0.3.0 + mime-types: 2.1.35 + + typescript@5.9.3: {} + + undici-types@6.21.0: {} + + unpipe@1.0.0: {} + + utils-merge@1.0.1: {} + + vary@1.1.2: {} + + xtend@4.0.2: {} + + yallist@4.0.0: {} diff --git a/reqs.txt b/reqs.txt new file mode 100644 index 0000000..5e50695 --- /dev/null +++ b/reqs.txt @@ -0,0 +1,15 @@ +Подготовьте docker-compose.yml и конфигурационные файлы для локального стенда веб-приложения: + +Состав: +1. Nginx — reverse proxy, TLS termination (self-signed cert), слушает :443. +2. Любое веб-приложение (например, httpbin, Grafana или простой Node.js/Python HTTP-сервер) — backend на :8080. +3. PostgreSQL 15 — база данных. +4. Redis — кэш сессий. + +Требования: +- Nginx проксирует на backend с правильными заголовками X-Forwarded-For/Proto/Host. +- healthcheck для всех четырёх сервисов. +- .env файл для паролей и переменных (не хардкодить в compose). +- nginx.conf с rate limiting (10 req/s на IP) и ограничением размера тела запроса (10MB). +- Сгенерировать self-signed сертификат через скрипт gen-certs.sh (openssl). +- README.md с инструкцией по запуску (3–5 команд). \ No newline at end of file diff --git a/src/db.ts b/src/db.ts new file mode 100644 index 0000000..acf0875 --- /dev/null +++ b/src/db.ts @@ -0,0 +1,22 @@ +import { Pool } from 'pg'; +import dotenv from 'dotenv'; + +dotenv.config(); + +export const pgPool = new Pool({ + host: process.env.POSTGRES_HOST, + port: Number(process.env.POSTGRES_PORT || 5432), + database: process.env.POSTGRES_DB, + user: process.env.POSTGRES_USER, + password: process.env.POSTGRES_PASSWORD, +}); + +export async function initDb(): Promise { + await pgPool.query(` + CREATE TABLE IF NOT EXISTS motd ( + id SERIAL PRIMARY KEY, + message TEXT NOT NULL, + created_at TIMESTAMP NOT NULL DEFAULT NOW() + ) + `); +} \ No newline at end of file diff --git a/src/http/motd.ts b/src/http/motd.ts new file mode 100644 index 0000000..a51cefe --- /dev/null +++ b/src/http/motd.ts @@ -0,0 +1,85 @@ +import { Express } from 'express'; +import { redisClient } from '../index.js'; +import { pgPool } from '../db.js'; + + +export async function httpMotd(app: Express) { + + app.get('/motd', async (_req, res) => { + try { + const cached = await redisClient.get('motd:current'); + if (cached) { + return res.json({ + source: 'redis', + message: cached, + }); + } + + const result = await pgPool.query( + ` + SELECT message + FROM motd + ORDER BY created_at DESC, id DESC + LIMIT 1 + ` + ); + + if (result.rowCount === 0) { + return res.status(404).json({ + error: 'No MOTD set', + }); + } + + const message = result.rows[0].message as string; + await redisClient.set('motd:current', message, { + EX: 60, + }); + + return res.json({ + source: 'postgres', + message, + }); + } catch (error) { + console.error(error); + return res.status(500).json({ + error: 'Internal server error', + }); + } + }); + + app.post('/motd', async (req, res) => { + try { + const message = req.body?.message; + + if (typeof message !== 'string' || message.trim() === '') { + return res.status(400).json({ + error: 'message must be a non-empty string', + }); + } + + const trimmedMessage = message.trim(); + + await pgPool.query( + ` + INSERT INTO motd (message) + VALUES ($1) + `, + [trimmedMessage] + ); + + await redisClient.set('motd:current', trimmedMessage, { + EX: 60, + }); + + return res.status(201).json({ + message: 'MOTD updated', + motd: trimmedMessage, + }); + } catch (error) { + console.error(error); + return res.status(500).json({ + error: 'Internal server error', + }); + } + }); +} \ No newline at end of file diff --git a/src/index.ts b/src/index.ts new file mode 100644 index 0000000..0569c52 --- /dev/null +++ b/src/index.ts @@ -0,0 +1,36 @@ +import dotenv from 'dotenv'; +import express from 'express'; +import { createClient } from 'redis'; +import { initDb } from './db.js'; +import { httpMotd } from './http/motd.js'; + +dotenv.config(); + +const app = express(); +app.use(express.json()); + +const port = Number(3000); + +export const redisClient = createClient({ + url: process.env.REDIS_URL, +}); + +redisClient.on('error', (err) => { + console.error('Redis error:', err); +}); + +async function main(): Promise { + await redisClient.connect(); + await initDb(); + + await httpMotd(app); + + app.listen(port, () => { + console.log(`Listening on port ${port}`); + }); +} + +main().catch((error) => { + console.error('Failed to start app:', error); + process.exit(1); +}); \ No newline at end of file diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..160b3f0 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,13 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "NodeNext", + "moduleResolution": "NodeNext", + "outDir": "dist", + "rootDir": "src", + "strict": true, + "esModuleInterop": true, + "skipLibCheck": true + }, + "include": ["src"] +} \ No newline at end of file