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solution #217

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Nazarii-Lesniak Mar 22, 2026
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Nazarii-Lesniak Mar 22, 2026
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Nazarii-Lesniak Mar 22, 2026
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23 changes: 23 additions & 0 deletions .github/workflows/test.yml-template
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Original file line number Diff line number Diff line change
@@ -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
9 changes: 5 additions & 4 deletions package-lock.json
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2 changes: 1 addition & 1 deletion package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -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",
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118 changes: 116 additions & 2 deletions src/createServer.js
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@@ -1,8 +1,122 @@
'use strict';

const http = require('http');
const zlib = require('zlib');
const { Readable } = require('stream');

function createServer() {
/* Write your code here */
// Return instance of http.Server class
return http.createServer((request, response) => {
if (request.url === '/' && request.method === 'GET') {
const htmlString = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Form Example</title>
</head>
<body>
<form action="/compress" method="POST" enctype="multipart/form-data">
<input type="file" name="file">
<select name="compressionType">
<option value="gzip">GZIP Compression</option>
<option value="deflate">DEFLATE Compression</option>
<option value="br">BR Compression</option>
</select>
<button type="submit">Submit</button>
</form>
</body>
</html>
`;

response.setHeader('Content-Type', 'text/html');
response.statusCode = 200;
response.end(htmlString);
} else if (request.url === '/compress') {
if (request.method === 'GET') {
response.statusCode = 400;
response.end('Bad Request');

return;
}

if (request.method === 'POST') {
const boundary = request.headers['content-type'].split('boundary=')[1];
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@mateacademy-ai-mentor mateacademy-ai-mentor Mar 22, 2026

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The application could crash if the 'content-type' header is missing or doesn't contain a boundary. It's important to validate the header before attempting to access its properties. According to the requirements, the server should handle this as an invalid form submission and respond with a 400 status code.


const chunks = [];

request.on('data', (chunk) => {
chunks.push(chunk);
});

request.on('end', () => {
const fullBuffer = Buffer.concat(chunks);
const fileNameMatch = fullBuffer.toString().match(/filename="(.+?)"/);
const compressionMatch = fullBuffer
.toString()
.match(/name="compressionType"\r\n\r\n(.+?)\r\n/);

if (!fileNameMatch || !compressionMatch) {
response.statusCode = 400;
response.end('Bad Request');

return;
}

const fileName = fileNameMatch[1];
const compressionType = compressionMatch[1];

if (!['gzip', 'deflate', 'br'].includes(compressionType)) {
response.statusCode = 400;
response.end('Invalid Compression Type');

return;
}

const startFileName = fullBuffer.indexOf('filename="' + fileName);
const fileContentStart =
fullBuffer.indexOf('\r\n\r\n', startFileName) + 4;
const fileContendEnd = fullBuffer.indexOf(
'\r\n--' + boundary,
fileContentStart,
);
const fileBuffer = fullBuffer.subarray(
fileContentStart,
fileContendEnd,
);

const fileStream = Readable.from(fileBuffer);

let compressedStream;

if (compressionType === 'gzip') {
compressedStream = zlib.createGzip();
}

if (compressionType === 'deflate') {
compressedStream = zlib.createDeflate();
}

if (compressionType === 'br') {
compressedStream = zlib.createBrotliCompress();
}

const newFileName = `${fileName}.${compressionType}`;
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@mateacademy-ai-mentor mateacademy-ai-mentor Mar 22, 2026

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The task description requires the file extensions to be .gz, .dfl, and .br for gzip, deflate, and br compression types respectively. This line appends the full compression type name as the extension, resulting in incorrect extensions like .gzip and .deflate. You should map the compression type to the correct file extension.


response.statusCode = 200;

response.setHeader(
'Content-Disposition',
`attachment; filename=${newFileName}`,
);

fileStream.pipe(compressedStream).pipe(response);
});
}
} else {
response.statusCode = 404;
response.end('Not Found');
}
});
}

module.exports = {
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