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": "^2.1.2",
     "axios": "^1.7.2",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
@@ -30,5 +30,8 @@
   },
   "mateAcademy": {
     "projectType": "javascript"
+  },
+  "dependencies": {
+    "busboy": "^1.6.0"
   }
 }

src/createServer.js

@@ -1,8 +1,158 @@
 'use strict';
 
+const http = require('http');
+const fs = require('fs/promises');
+const fsCb = require('fs');
+const path = require('path');
+const zlib = require('zlib');
+const { pipeline } = require('stream');
+const busboy = require('busboy');
+
+const form = `<form action="http://localhost:5700/compress" method="POST" enctype="multipart/form-data" style="display: flex; flex-direction: column; max-width: 300px; row-gap: 12px">
+                <select name="compressionType">
+                  <option value="gzip">gzip</option>
+                  <option value="deflate">deflate</option>
+                  <option value="br">br</option>
+                </select>
+                <input type="file" name="file" />
+                <input type="submit"/>
+              </form>`;
+
 function createServer() {
-  /* Write your code here */
-  // Return instance of http.Server class
+  const acceptableCompression = {
+    gzip: { create: zlib.createGzip },
+    deflate: { create: zlib.createDeflate },
+    br: { create: zlib.createBrotliCompress },
+  };
+
+  const compressionExtensions = {
+    gzip: 'gz',
+    deflate: 'dfl',
+    br: 'br',
+  };
+
+  const acceptableEndpoint = {
+    index: {
+      path: 'index',
+      method: 'GET',
+    },
+    compress: {
+      path: 'compress',
+      method: 'POST',
+    },
+  };
+
+  const server = new http.Server();
+
+  server.on('request', async (req, res) => {
+    const normalizeUrl = new URL(req.url, `http://${req.headers.host}`);
+    const requestedPath = normalizeUrl.pathname.slice(1) || 'index';
+    const requestedMethod = req.method;
+
+    if (!Object.keys(acceptableEndpoint).includes(requestedPath)) {
+      res.statusCode = 404;
+      res.setHeader('Content-Type', 'text/plain');
+
+      return res.end('Non-existent endpoint');
+    }
+
+    if (
+      requestedPath === acceptableEndpoint.index.path &&
+      requestedMethod === acceptableEndpoint.index.method
+    ) {
+      res.statusCode = 200;
+      res.setHeader('Content-Type', 'text/html');
+
+      return res.end(form);
+    }
+
+    if (
+      requestedPath === acceptableEndpoint.compress.path &&
+      requestedMethod === acceptableEndpoint.compress.method
+    ) {
+      const field = {};
+      const file = {};
+      const writeStreamPromises = [];
+      const tmpDir = await fs.mkdtemp(path.resolve(__dirname, '..', 'upload-'));
+      const bb = busboy({ headers: req.headers });
+
+      res.on('close', () => {
+        fs.rm(tmpDir, { recursive: true });
+      });
+
+      bb.on('field', (name, value) => (field[name] = value));
+
+      bb.on('file', (name, fileStream, info) => {
+        const { filename, mimeType } = info;
+        const filePath = path.join(tmpDir, `${filename}`);
+
+        if (!filePath.startsWith(tmpDir)) {
+          res.writeHead(400, { 'content-type': 'text/plain' });
+
+          return res.end('Invalid filename');
+        }
+
+        file.fileName = filename;
+        file.mimeType = mimeType;
+        file.filePath = filePath;
+
+        const streamPromis = new Promise((resolve, reject) => {
+          const wrs = fsCb
+            .createWriteStream(filePath)
+            .on('finish', () => resolve())
+            .on('error', (er) => reject(er));
+
+          fileStream.on('error', (er) => reject(er));
+          fileStream.pipe(wrs);
+        });
+
+        writeStreamPromises.push(streamPromis);
+      });
+
+      bb.on('close', async () => {
+        if (!field.compressionType || !file.fileName) {
+          res.writeHead(400, { 'content-type': 'text/plain' });
+          res.end('form is invalid');
+        } else {
+          await Promise.all(writeStreamPromises);
+
+          const type = field.compressionType;
+
+          if (!acceptableCompression[type]) {
+            res.writeHead(400, { 'content-type': 'text/plain' });
+
+            return res.end('You entered the wrong format');
+          }
+
+          const readingFileStream = fsCb.createReadStream(file.filePath);
+          const compressionStream = acceptableCompression[type].create();
+          const resFileName = `${file.fileName}.${compressionExtensions[type]}`;
+
+          res.writeHead(200, {
+            'content-type': `application/${field.compressionType}`,
+            'content-disposition': `attachment; filename=${resFileName}`,
+          });
+
+          pipeline(readingFileStream, compressionStream, res, (err) => {
+            // eslint-disable-next-line no-console, curly
+            if (err) console.log(err);
+          });
+        }
+      });
+
+      req.pipe(bb);
+
+      return;
+    }
+
+    res.statusCode = 400;
+    res.setHeader('Content-Type', 'text/plain');
+    res.end('Not supported method');
+  });
+
+  server.on('error', () => {});
+
+  return server;
 }
 
 module.exports = {