The Solution

.github/workflows/test.yml-template

@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test

package.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "@faker-js/faker": "^8.4.1",
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^2.1.3",
     "axios": "^1.7.2",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",

src/createServer.js

@@ -1,8 +1,41 @@
 'use strict';
 
+const http = require('http');
+const { notFound, badRequest, hint } = require('./helpers/responses');
+const { fileOutput } = require('./handlers/fileHandler');
+
 function createServer() {
-  /* Write your code here */
-  // Return instance of http.Server class
+  const server = http.createServer((req, res) => {
+    const rawUrl = req.url.split('?')[0];
+
+    let decodedUrl;
+
+    try {
+      decodedUrl = decodeURIComponent(rawUrl);
+    } catch (e) {
+      return badRequest(res);
+    }
+
+    if (decodedUrl.includes('//')) {
+      return notFound(res);
+    }
+
+    if (decodedUrl.includes('..') || !decodedUrl.startsWith('/file')) {
+      return badRequest(res);
+    }
+
+    const urlArr = decodedUrl.split('/').filter(Boolean);
+
+    if (decodedUrl === '/file' || urlArr[0] !== 'file') {
+      return hint(res);
+    }
+
+    const filename = 'public/' + urlArr.slice(1).join('/');
+
+    fileOutput(res, filename);
+  });
+
+  return server;
 }
 
 module.exports = {

src/handlers/fileHandler.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const { notFound } = require('../helpers/responses');
+
+const mimeTypes = {
+  '.html': 'text/html',
+  '.css': 'text/css',
+  '.js': 'application/javascript',
+  '.txt': 'text/plain',
+};
+
+function fileOutput(res, filename) {
+  const stream = fs.createReadStream(filename);
+
+  stream.on('open', () => {
+    const ext = path.extname(filename).toLowerCase();
+    const contentType = mimeTypes[ext] || 'text/plain';
+
+    res.writeHead(200, { 'Content-Type': contentType });
+    stream.pipe(res);
+  });
+
+  stream.on('error', () => {
+    if (res.headersSent) {
+      return res.end();
+    }
+    notFound(res);
+  });
+}
+
+module.exports = {
+  fileOutput,
+};

src/helpers/responses.js

@@ -0,0 +1,22 @@
+'use strict';
+
+function notFound(res) {
+  res.writeHead(404, { 'Content-Type': 'text/plain' });
+  res.end('Not Found');
+}
+
+function badRequest(res) {
+  res.writeHead(400, { 'Content-Type': 'text/plain' });
+  res.end('Bad Request');
+}
+
+function hint(res) {
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.end('Hint: /file/*filename*');
+}
+
+module.exports = {
+  notFound,
+  badRequest,
+  hint,
+};