add task solution

mate-academy · Nov 14, 2023 · cad2c5e · cad2c5e
1 parent e29bd82
commit cad2c5e
Showing 1 changed file with 114 additions and 0 deletions.
diff --git a/src/index.js b/src/index.js
@@ -1 +1,115 @@
+/* eslint-disable no-console */
 'use strict';
+
+const http = require('http');
+const fs = require('fs');
+const zlib = require('zlib');
+const formidable = require('formidable');
+const { pipeline } = require('stream');
+
+const PORT = process.env.PORT || '3000';
+
+const server = http.Server();
+
+server.on('request', (req, res) => {
+  if (req.url === '/download' && req.method === 'POST') {
+    const form = new formidable.IncomingForm();
+
+    form.parse(req, (err, fields, files) => {
+      if (err) {
+        res.statusCode = 400;
+        res.end(JSON.stringify(err));
+
+        return;
+      }
+
+      const { file } = files;
+      const { compression } = fields;
+
+      if (!file || !compression) {
+        res.statusCode = 400;
+        res.end('Please select a file and compression type');
+
+        return;
+      }
+
+      const readStream = fs.createReadStream(file.filepath);
+
+      let compressionStream;
+      let extension;
+
+      switch (compression) {
+        case 'gzip':
+          extension = '.gzip';
+          compressionStream = zlib.createGzip();
+          break;
+        case 'deflate':
+          extension = '.dfl';
+          compressionStream = zlib.createDeflate();
+          break;
+        case 'br':
+          extension = '.br';
+          compressionStream = zlib.createBrotliCompress();
+          break;
+      }
+
+      res.setHeader('Content-Encoding', extension);
+
+      const fileName = file.originalFilename + extension;
+
+      pipeline(readStream, compressionStream, res, (error) => {
+        if (error) {
+          console.log(error);
+
+          res.end(JSON.stringify(err));
+        }
+      });
+
+      res.setHeader('Content-Type', 'application/octet-stream');
+
+      res.setHeader(
+        'Content-Disposition',
+        `attachment; filename=${fileName}`
+      );
+
+      res.statusCode = 200;
+      res.end();
+    });
+  } else if (req.url === '/' && req.method === 'GET') {
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+
+    res.end(`
+      <!DOCTYPE html>
+      <html lang="en">
+        <head>
+          <meta charset="UTF-8">
+          <meta name="viewport" content="width=device-width, initial-scale=1.0">
+          <title>Document</title>
+        </head>
+        <body>
+          <form action="/download" method="POST" enctype="multipart/form-data">
+            <label for="file">
+              Select file:
+              <input id="file" type="file" name="file"/>
+            </label>
+            <label for="type">
+              Select type of compression:
+              <select name="compression">
+                <option value="gzip">Gzip</option>
+                <option value="deflate">Deflate</option>
+                <option value="br">Brotli</option>
+              </select>
+            </label>
+            <button type="submit">Submit</button>
+          </form>
+        </body>
+      </html>
+    `);
+  }
+});
+
+server.on('error', () => {});
+
+server.listen(PORT, () => {
+  console.log(`Server running at http://localhost:${PORT}`);
+});