mate-academy · oberezhnay · Jan 6, 2026 · Jan 6, 2026 · Jan 6, 2026 · Jan 6, 2026
diff --git a/readme.md b/readme.md
@@ -19,4 +19,5 @@ To pass the task you also need to implement a server that:
 - respond with 400 status code if trying to compress a file with an unsupported compression type
 - respond with 200 status code and compressed file if the form is valid
 
+
 **Read [the guideline](https://github.com/mate-academy/js_task-guideline/blob/master/README.md) before start**
diff --git a/src/createServer.js b/src/createServer.js
@@ -1,8 +1,128 @@
 'use strict';
 
+const http = require('http');
+const fs = require('fs');
+const path = require('path');
+const { pipeline, Readable } = require('stream');
+const zlib = require('zlib');
+
+const COMPRESSION_TYPES = ['gzip', 'deflate', 'br'];
+
+function sendStatus(res, code) {
+  if (!res.headersSent) {
+    res.writeHead(code);
+    res.end();
+  }
+}
+
 function createServer() {
-  /* Write your code here */
-  // Return instance of http.Server class
+  return http.createServer((req, res) => {
+    const { url, method, headers } = req;
+
+    if (url === '/' && method === 'GET') {
+      const htmlPath = path.join(__dirname, 'index.html');
+      const readStream = fs.createReadStream(htmlPath, 'utf-8');
+
+      res.writeHead(200, { 'Content-Type': 'text/html' });
+
+      pipeline(readStream, res, (err) => {
+        if (err) {
+          sendStatus(res, 500);
+        }
+      });
+
+      return;
+    }
+
+    if (method === 'GET' && url === '/compress') {
+      sendStatus(res, 400);
+
+      return;
+    }
+
+    if (method === 'POST' && url === '/compress') {
+      const contentType = headers['content-type'];
+
+      if (!contentType || !contentType.includes('multipart/form-data')) {
+        return sendStatus(res, 400);
+      }
+
+      const boundary = '--' + contentType.split('boundary=')[1];
+
+      let body = Buffer.alloc(0);
+
+      req.on('data', (chunk) => {
+        body = Buffer.concat([body, chunk]);
+      });
+
+      req.on('end', () => {
+        const parts = body.toString('binary').split(boundary);
+
+        let fileBuffer;
+        let fileName;
+        let compressionType;
+
+        for (const part of parts) {
+          if (part.includes('name="compressionType"')) {
+            compressionType = part.split('\r\n\r\n')[1]?.trim();
+          }
+
+          if (part.includes('name="file"')) {
+            const match = part.match(/filename="(.+?)"/);
+
+            if (match) {
+              fileName = match[1];
+
+              const fileContent = part.split('\r\n\r\n')[1];
+
+              fileBuffer = Buffer.from(
+                fileContent.slice(0, fileContent.lastIndexOf('\r\n')),
+                'binary',
+              );
+            }
+          }
+        }
+
+        if (!fileBuffer || !fileName || !compressionType) {
+          return sendStatus(res, 400);
+        }
+
+        if (!COMPRESSION_TYPES.includes(compressionType)) {
+          return sendStatus(res, 400);
+        }
+
+        let compressor;
+        let extension;
+
+        if (compressionType === 'gzip') {
+          compressor = zlib.createGzip();
+          extension = '.gzip';
+        }
+
+        if (compressionType === 'deflate') {
+          compressor = zlib.createDeflate();
+          extension = '.deflate';
+        }
+
+        if (compressionType === 'br') {
+          compressor = zlib.createBrotliCompress();
+          extension = '.br';
+        }
+
+        res.writeHead(200, {
+          'Content-Disposition': `attachment; filename=${fileName}${extension}`,
+          'Content-Type': 'application/octet-stream',
+        });
+
+        pipeline(Readable.from(fileBuffer), compressor, res, () => {});
+      });
+
+      return;
+    }
+
+    res.statusCode = 404;
+    res.end('Not Found');
+  });
 }
 
 module.exports = {

diff --git a/src/index.html b/src/index.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+</head>
+<body>
+  <form action="/compress" method="POST" enctype="multipart/form-data">
+    <label for="file">Select file: </label>
+    <input type="file" id="file" name="file" required>
+
+    <label for="compressionType">Comresion</label>
+    <select name="compressionType" id="compressionType" required>
+      <option value="gzip">Gzip</option>
+      <option value="deflate">Deflate</option>
+      <option value="br">Brotli</option>
+    </select>
+    <br />
+
+    <button type="submit">Compress</button>
+  </form>
+</body>
+</html>
Original file line number	Diff line number	Diff line change
Expand Up		@@ -19,4 +19,5 @@ To pass the task you also need to implement a server that:
		- respond with 400 status code if trying to compress a file with an unsupported compression type
		- respond with 200 status code and compressed file if the form is valid


		Read [the guideline](https://github.com/mate-academy/js_task-guideline/blob/master/README.md) before start