Implement ASGI application with fibonacci, factorial, and mean endpoints

.github/workflows/hw2-tests.yml

@@ -1,39 +1,62 @@
-name: "HW2 Tests"
+name: HW2 Tests
 
-# Запускаем тесты при изменении файлов в hw2/hw/
 on:
-  pull_request:
-    branches: [ main ]
-    paths: [ 'hw2/hw/**' ]
   push:
-    branches: [ main ]
-    paths: [ 'hw2/hw/**' ]
+    branches: [ main, master ]
+    paths:
+      - 'hw2/**'
+      - '.github/workflows/hw2-tests.yml'
+  pull_request:
+    branches: [ main, master ]
+    paths:
+      - 'hw2/**'
+      - '.github/workflows/hw2-tests.yml'
 
 jobs:
-  test-hw2:
+  test:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.12", "3.13"]
-
+
+    services:
+      postgres:
+        image: postgres:15-alpine
+        env:
+          POSTGRES_DB: shop_db
+          POSTGRES_USER: shop_user
+          POSTGRES_PASSWORD: shop_password
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v4
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+    - uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
       with:
-        python-version: ${{ matrix.python-version }}
-    
+        python-version: '3.11'
+
     - name: Install dependencies
-      working-directory: hw2/hw
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements.txt
+        pip install -r hw2/hw/requirements.txt
+        pip install pytest-cov
 
-    - name: Run tests
-      working-directory: hw2/hw
+    - name: Run tests with coverage
       env:
+        DATABASE_URL: postgresql+asyncpg://shop_user:shop_password@localhost:5432/shop_db
         PYTHONPATH: ${{ github.workspace }}/hw2/hw
       run: |
-        pytest test_homework2.py -v
+        cd hw2/hw
+        pytest test_homework2.py test_additional.py --cov=shop_api --cov-report=term --cov-report=xml --cov-fail-under=95 -v
+
+    - name: Upload coverage reports
+      uses: codecov/codecov-action@v4
+      if: always()
+      with:
+        file: ./hw2/hw/coverage.xml
+        flags: hw2
+        name: hw2-coverage

hw1/app.py

@@ -1,6 +1,105 @@
 from typing import Any, Awaitable, Callable
+import json
+import math
+from urllib.parse import parse_qs
 
+async def respond(send, status: int, body: dict[str, Any]):
+    await send({
+        "type": "http.response.start",
+        "status": status,
+        "headers": [(b"content-type", b"application/json")],
+    })
+    await send({"type": "http.response.body", "body": json.dumps(body).encode()})
 
+async def read_http_body(receive) -> bytes:
+    chunks: list[bytes] = []
+    more = True
+    while more:
+        message = await receive()
+        if message["type"] != "http.request":
+            continue
+        chunks.append(message.get("body", b""))
+        more = message.get("more_body", False)
+    return b"".join(chunks)
+
+def parse_query(scope) -> dict[str, list[str]]:
+    return parse_qs(scope.get("query_string", b"").decode())
+
+async def handle_fibonacci(method: str, path: str, send):
+    if method != "GET":
+        return await respond(send, 422, {"error": "Unsupported method"})
+    param = path[len("/fibonacci/") :]
+    if not param:
+        return await respond(send, 422, {"error": "Invalid n"})
+    try:
+        n = int(param)
+    except ValueError:
+        return await respond(send, 422, {"error": "Invalid n"})
+    if n < 0:
+        return await respond(send, 400, {"error": "n must be non-negative"})
+    a, b = 0, 1
+    for _ in range(n):
+        a, b = b, a + b
+    return await respond(send, 200, {"result": a})
+
+async def handle_factorial(method: str, query: dict[str, list[str]], send):
+    if method != "GET":
+        return await respond(send, 422, {"error": "Unsupported method"})
+    raw = query.get("n")
+    if not raw or raw[0] == "":
+        return await respond(send, 422, {"error": "Invalid n"})
+    try:
+        n = int(raw[0])
+    except ValueError:
+        return await respond(send, 422, {"error": "Invalid n"})
+    if n < 0:
+        return await respond(send, 400, {"error": "n must be non-negative"})
+    return await respond(send, 200, {"result": math.factorial(n)})
+
+async def handle_mean(method: str, query: dict[str, list[str]], receive, send):
+    if method != "GET":
+        return await respond(send, 422, {"error": "Unsupported method"})
+    body = await read_http_body(receive)
+
+    if body:
+        try:
+            data = json.loads(body.decode() or "null")
+        except json.JSONDecodeError:
+            return await respond(send, 422, {"error": "Invalid JSON body"})
+        if not isinstance(data, list):
+            return await respond(send, 422, {"error": "Invalid JSON body"})
+        if len(data) == 0:
+            return await respond(send, 400, {"error": "numbers must be non-empty list"})
+        nums: list[float] = []
+        for v in data:
+            if isinstance(v, (int, float)):
+                nums.append(float(v))
+            else:
+                return await respond(send, 422, {"error": "All items must be numbers"})
+        return await respond(send, 200, {"result": sum(nums) / len(nums)})
+
+    numbers_param = query.get("numbers", [None])[0]
+    if numbers_param is None:
+        return await respond(send, 422, {"error": "Invalid JSON body"})
+    parts = [p.strip() for p in numbers_param.split(",") if p.strip()]
+    if not parts:
+        return await respond(send, 400, {"error": "numbers must be non-empty list"})
+    try:
+        nums = [float(p) for p in parts]
+    except ValueError:
+        return await respond(send, 422, {"error": "All items must be numbers"})
+    return await respond(send, 200, {"result": sum(nums) / len(nums)})
+
+async def handle_lifespan(receive, send):
+    while True:
+        msg = await receive()
+        t = msg.get("type")
+        if t == "lifespan.startup":
+            await send({"type": "lifespan.startup.complete"})
+        elif t == "lifespan.shutdown":
+            await send({"type": "lifespan.shutdown.complete"})
+            return
+
 async def application(
     scope: dict[str, Any],
     receive: Callable[[], Awaitable[dict[str, Any]]],
@@ -12,7 +111,23 @@ async def application(
         receive: Корутина для получения сообщений от клиента
         send: Корутина для отправки сообщений клиенту
     """
-    # TODO: Ваша реализация здесь
+    if scope["type"] == "lifespan":
+        return await handle_lifespan(receive, send)
+    if scope["type"] != "http":
+        return
+
+    method = scope["method"]
+    path = scope["path"]
+    query = parse_query(scope)
+
+    if path.startswith("/fibonacci/"):
+        return await handle_fibonacci(method, path, send)
+    if path == "/factorial":
+        return await handle_factorial(method, query, send)
+    if path == "/mean":
+        return await handle_mean(method, query, receive, send)
+
+    return await respond(send, 404, {"error": "Not found"})
 
 if __name__ == "__main__":
     import uvicorn

hw2/hw/.coveragerc

@@ -0,0 +1,6 @@
+[run]
+source = shop_api
+concurrency = thread,greenlet
+
+[report]
+precision = 2

hw2/hw/Dockerfile

@@ -0,0 +1,23 @@
+FROM python:3.13 AS base
+
+ARG PYTHONFAULTHANDLER=1 \
+    PYTHONUNBUFFERED=1 \
+    PYTHONHASHSEED=random \
+    PIP_NO_CACHE_DIR=on \
+    PIP_DISABLE_PIP_VERSION_CHECK=on \
+    PIP_DEFAULT_TIMEOUT=500
+
+RUN apt-get update && apt-get install -y gcc
+RUN python -m pip install --upgrade pip
+
+WORKDIR /app/src
+COPY . ./
+
+ENV VIRTUAL_ENV=/app/src/.venv \
+    PATH=/app/src/.venv/bin:$PATH
+
+RUN pip install -r requirements.txt
+
+FROM base as local
+
+CMD ["uvicorn", "shop_api.main:app", "--port", "8080", "--host", "0.0.0.0"]

hw2/hw/conftest.py

@@ -0,0 +1,21 @@
+import pytest
+import asyncio
+from sqlalchemy import text
+from shop_api.database import Base, engine, async_session_maker
+
+
+@pytest.fixture(scope="session", autouse=True)
+def setup_database():
+    async def init_db():
+        async with engine.begin() as conn:
+            await conn.run_sync(Base.metadata.drop_all)
+            await conn.run_sync(Base.metadata.create_all)
+
+    asyncio.run(init_db())
+    yield
+
+    async def cleanup_db():
+        await engine.dispose()
+
+    asyncio.run(cleanup_db())
+

hw2/hw/docker-compose.yml

@@ -0,0 +1,65 @@
+version: "3"
+
+services:
+
+  postgres:
+    image: postgres:15-alpine
+    restart: always
+    environment:
+      POSTGRES_DB: shop_db
+      POSTGRES_USER: shop_user
+      POSTGRES_PASSWORD: shop_password
+    ports:
+      - 5432:5432
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - monitoring
+
+  shop-api:
+    build:
+      context: .
+      dockerfile: ./Dockerfile
+      target: local
+    restart: always
+    ports:
+      - 8080:8080
+    environment:
+      DATABASE_URL: postgresql+asyncpg://shop_user:shop_password@postgres:5432/shop_db
+    depends_on:
+      - postgres
+    networks:
+      - monitoring
+
+  grafana:
+    image: grafana/grafana:latest
+    ports:
+      - 3000:3000
+    restart: always
+    networks:
+      - monitoring
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+      - GF_SECURITY_ADMIN_USER=admin
+
+  prometheus:
+    image: prom/prometheus
+    volumes:
+      - ./settings/prometheus/:/etc/prometheus/
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+      - "--storage.tsdb.path=/prometheus"
+      - "--web.console.libraries=/usr/share/prometheus/console_libraries"
+      - "--web.console.templates=/usr/share/prometheus/consoles"
+    ports:
+      - 9090:9090
+    restart: always
+    networks:
+      - monitoring
+
+networks:
+  monitoring:
+    driver: bridge
+
+volumes:
+  postgres_data:

hw2/hw/requirements.txt

@@ -2,8 +2,14 @@
 fastapi>=0.117.1
 uvicorn>=0.24.0
 
+prometheus-fastapi-instrumentator>=6.1.0
+
+sqlalchemy>=2.0.0
+asyncpg>=0.29.0
+
 # Зависимости для тестирования
 pytest>=7.4.0
 pytest-asyncio>=0.21.0
+pytest-cov>=4.1.0
 httpx>=0.27.2
 Faker>=37.8.0

hw2/hw/run_demos.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"
+
+PYTHON=${PYTHON:-python3}
+
+for script in transaction_demos/[0-9]*.py; do
+    echo "=== $script ==="
+    $PYTHON "$script"
+    echo ""
+done
+

hw2/hw/settings/prometheus/prometheus.yml

@@ -0,0 +1,9 @@
+global:
+  scrape_interval: 10s
+
+scrape_configs:
+  - job_name: 'shop-api'
+    metrics_path: /metrics
+    static_configs:
+      - targets:
+          - shop-api:8080