lab-2: add Caddy-based configuration as extra task

lab-2/caddy/.dockerignore

@@ -0,0 +1,4 @@
+.env
+certs/
+__pycache__/
+*.pyc

lab-2/caddy/Caddyfile

@@ -0,0 +1,24 @@
+{
+    auto_https off
+}
+
+:80 {
+    redir https://{host}{uri} permanent
+}
+
+:443 {
+    tls /run/secrets/lab2_crt /run/secrets/lab2_key
+
+    handle_path /static/* {
+        root * /staticfiles
+        file_server
+    }
+
+    handle /admin/* {
+        reverse_proxy backend_service:8000
+    }
+
+    handle /api/* {
+        reverse_proxy backend_service:8000
+    }
+}

lab-2/caddy/backend/Dockerfile

@@ -0,0 +1,11 @@
+FROM python:3.12-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .

lab-2/caddy/backend/lab1/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for lab1 project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/6.0/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'lab1.settings')
+
+application = get_asgi_application()

lab-2/caddy/backend/lab1/settings.py

@@ -0,0 +1,133 @@
+"""
+Django settings for lab1 project.
+
+Generated by 'django-admin startproject' using Django 6.0.3.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/6.0/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/6.0/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/6.0/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure--xqwhdo2$)n*y3yk=d*vmwx6nuwt8h=m5@_og_uzj+11^hu7))'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = ['*']
+CSRF_TRUSTED_ORIGINS = ['http://localhost', 'https://localhost']
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+
+    'rest_framework',
+    'quiz',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'lab1.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'lab1.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/6.0/ref/settings/#databases
+
+import os
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': os.environ.get('POSTGRES_DB', 'lab_db'),
+        'USER': os.environ.get('POSTGRES_USER', 'django'),
+        'PASSWORD': os.environ.get('POSTGRES_PASSWORD', 'password'),
+        'HOST': os.environ.get('POSTGRES_HOST', 'postgres_service'),
+        'PORT': os.environ.get('POSTGRES_PORT', 5432),
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/6.0/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/6.0/topics/i18n/
+
+LANGUAGE_CODE = 'ru-ru'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/6.0/howto/static-files/
+
+STATIC_URL = 'static/'
+STATIC_ROOT = BASE_DIR / 'staticfiles'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/6.0/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

lab-2/caddy/backend/lab1/urls.py

@@ -0,0 +1,13 @@
+from django.contrib import admin
+from django.urls import path, include
+from rest_framework import routers
+from quiz.views import QuizViewSet
+
+router = routers.DefaultRouter()
+router.register(r'quiz', QuizViewSet)
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path('api/', include(router.urls)),
+]
+

lab-2/caddy/backend/lab1/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for lab1 project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/6.0/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'lab1.settings')
+
+application = get_wsgi_application()

lab-2/caddy/backend/manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'lab1.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

lab-2/caddy/backend/quiz/admin.py

@@ -0,0 +1,4 @@
+from django.contrib import admin
+from .models import Quiz
+
+admin.site.register(Quiz)

lab-2/caddy/backend/quiz/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class QuizConfig(AppConfig):
+    name = 'quiz'

lab-2/caddy/backend/quiz/gentestdata.py

@@ -0,0 +1,18 @@
+import random
+from .models import Quiz
+from django.db import transaction
+from faker import Faker
+
+fk = Faker()
+
+def gentestdata():
+    with transaction.atomic():
+        for i in range(100):
+            new_quiz = Quiz()
+            new_quiz.title = fk.sentence(nb_words=4)
+            new_quiz.description = fk.paragraph()
+            new_quiz.author = fk.name()
+            new_quiz.time_limit = random.randint(5, 60)
+            new_quiz.is_published = random.random() > 0.5
+            new_quiz.save()
+    print('Сделана генерация')

lab-2/caddy/backend/quiz/migrations/0001_initial.py

@@ -0,0 +1,26 @@
+# Generated by Django 6.0.3 on 2026-03-05 08:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Quiz',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=200)),
+                ('description', models.TextField()),
+                ('author', models.CharField(max_length=100)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('time_limit', models.IntegerField(help_text='Ограничение по времени в минутах')),
+                ('is_published', models.BooleanField(default=False)),
+            ],
+        ),
+    ]

lab-2/caddy/backend/quiz/models.py

@@ -0,0 +1,15 @@
+from django.db import models
+
+# Create your models here.
+
+class Quiz(models.Model):
+    title = models.CharField(max_length=200)
+    description = models.TextField()
+    author = models.CharField(max_length=100)
+    created_at = models.DateTimeField(auto_now_add=True)
+    time_limit = models.IntegerField(help_text='Ограничение по времени в минутах')
+    is_published = models.BooleanField(default=False)
+
+    def __str__(self):
+        return self.title
+

lab-2/caddy/backend/quiz/serializers.py

@@ -0,0 +1,7 @@
+from rest_framework import serializers
+from .models import Quiz
+
+class QuizSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Quiz
+        fields = '__all__'

lab-2/caddy/backend/quiz/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

lab-2/caddy/backend/quiz/views.py

@@ -0,0 +1,9 @@
+from django.shortcuts import render
+
+from rest_framework import viewsets
+from .models import Quiz
+from .serializers import QuizSerializer
+
+class QuizViewSet(viewsets.ModelViewSet):
+    queryset = Quiz.objects.all()
+    serializer_class = QuizSerializer

lab-2/caddy/backend/requirements.txt

@@ -0,0 +1,8 @@
+Django
+djangorestframework
+markdown
+django-filter
+django-cors-headers
+psycopg[binary,pool]
+faker
+gunicorn

lab-2/caddy/docker-compose.yaml

@@ -0,0 +1,55 @@
+name: lab2-caddy
+
+secrets:
+  lab2_crt:
+    file: ./certs/lab2.crt
+  lab2_key:
+    file: ./certs/lab2.key
+
+services:
+  postgres_service:
+    image: postgres:16-alpine
+    env_file:
+      - .env
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 10s
+      timeout: 30s
+      retries: 5
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
+  backend_service:
+    build: ./backend
+    command: >
+      sh -c "python manage.py migrate &&
+             python manage.py shell -c 'from quiz.gentestdata import gentestdata; gentestdata()' &&
+             python manage.py collectstatic --no-input &&
+             gunicorn lab1.wsgi:application --bind 0.0.0.0:8000"
+    volumes:
+      - static_volume:/app/staticfiles
+    env_file:
+      - .env
+    depends_on:
+      postgres_service:
+        condition: service_healthy
+    restart: unless-stopped
+
+  caddy_service:
+    image: caddy:alpine
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - static_volume:/staticfiles:ro
+    secrets:
+      - lab2_crt
+      - lab2_key
+    depends_on:
+      - backend_service
+    restart: unless-stopped
+
+volumes:
+  static_volume:
+  postgres_data:

lab-2/caddy/gen-cert.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+set -e
+mkdir -p certs
+
+# 1. Генерация корневого сертификата root.crt и его rsa-ключа root.key 
+openssl req -x509 -new -nodes -newkey rsa:2048 \
+  -keyout certs/root.key -days 3650 \
+  -out certs/root.crt -subj "//CN=Root CA"
+
+# 2.  Генерация  rsa-ключа  для  сертификата  сервера  и  вспомогательного  CSR-файла (Certificate Signing Request) на основе этого ключа
+openssl req -new -nodes -newkey rsa:2048 \
+  -keyout certs/lab2.key -out certs/lab2.csr \
+  -subj "//CN=lab2 server cert"
+
+# 3.  Собственно,  генерация  сертификата  сервера *.crt  из  *.csr-файла, сгенерированного выше
+echo "subjectAltName=DNS:localhost,IP:127.0.0.1" > certs/extfile.txt
+openssl x509 -req -in certs/lab2.csr -days 3650 \
+  -CA certs/root.crt -CAkey certs/root.key \
+  -CAcreateserial -out certs/lab2.crt \
+  -sha256 -extfile certs/extfile.txt
+rm certs/extfile.txt
+
+# 4.  Удаление  вспомогательного  CSR-файла
+rm certs/lab2.csr
+echo "Done. Certificates written to ./certs/"

lab-3/api_client.h

@@ -1,33 +1,3 @@
-/*
- * api_client.h — HTTP-клиент, реализующий паттерн «Синглтон»
- *
- * ╔══════════════════════════════════════════════════════════════════╗
- * ║                 ПАТТЕРН «СИНГЛТОН» (Singleton)                  ║
- * ╠══════════════════════════════════════════════════════════════════╣
- * ║  Задача: гарантировать, что в приложении существует ровно       ║
- * ║  ОДИН экземпляр QNetworkAccessManager. Создание нескольких      ║
- * ║  менеджеров приводит к дублированию соединений и cookie-хранилищ.║
- * ║                                                                  ║
- * ║  Реализация (Meyers' Singleton):                                 ║
- * ║  • статическая локальная переменная в instance()                ║
- * ║  • конструктор объявлен private                                 ║
- * ║  • копирующий конструктор и operator= удалены (= delete)        ║
- * ╚══════════════════════════════════════════════════════════════════╝
- *
- * ApiClient также является «клиентом» паттерна «Адаптер»:
- * он хранит указатель на IQuizAdapter и использует его
- * для преобразования ответов сервера в Quiz-объекты,
- * не зная о деталях реализации парсинга.
- *
- * Коммуникация с вызывающим кодом — через механизм сигналов Qt:
- *   quizzesReceived — список тестов успешно получен и десериализован
- *   quizReceived    — один тест успешно получен и десериализован
- *   quizCreated     — тест создан (POST)
- *   quizUpdated     — тест обновлён (PUT)
- *   quizDeleted     — тест удалён (DELETE)
- *   errorOccurred   — произошла сетевая ошибка или ошибка парсинга
- */
-
 #pragma once
 
 #include <QObject>