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Implement compression app solution #175

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a9fd21f
Implement compression app solution
AnnNikiforova Aug 19, 2025
09e6a14
Fix the issues
AnnNikiforova Aug 19, 2025
db2e0ec
Fix the issues 2
AnnNikiforova Aug 19, 2025
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99 changes: 97 additions & 2 deletions src/createServer.js
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Original file line number Diff line number Diff line change
@@ -1,8 +1,103 @@
'use strict';

const http = require('http');
const { IncomingForm } = require('formidable');
const zlib = require('zlib');
const fs = require('fs');

function createServer() {
/* Write your code here */
// Return instance of http.Server class
return http.createServer((req, res) => {
if (req.method === 'POST' && req.url === '/compress') {
const form = new IncomingForm({ multiples: false });

form.parse(req, (err, fields, files) => {
if (err) {
res.statusCode = 400;

return res.end('Parsing form error');
}

const compressionType = Array.isArray(fields.compressionType)
? fields.compressionType[0]
: fields.compressionType;
const file = files.file;

if (!file) {
res.statusCode = 400;

return res.end('Missing file');
}

if (!compressionType) {
res.statusCode = 400;

return res.end('Missing compression type');
}

const originalFileName = file[0].originalFilename;
const filePath = file[0].filepath.replace(/\\/g, '/');

let compressor;
let ext;

switch (compressionType) {
case 'gz':
compressor = zlib.createGzip();
ext = '.gz';
break;

case 'dfl':
compressor = zlib.createDeflate();
ext = '.dfl';
break;
Comment on lines +43 to +52
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@mateacademy-ai-mentor mateacademy-ai-mentor Aug 19, 2025

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The compression type values submitted by the form are 'gzip' and 'deflate', but the switch statement is checking for 'gz' and 'dfl'. This discrepancy will cause 'gzip' and 'deflate' requests to be incorrectly handled by the default case, resulting in an 'Unsupported compression type' error. To fix this, you should change the case statements to 'gzip' and 'deflate' to match the values in the HTML form's <option> tags.


case 'br':
compressor = zlib.createBrotliCompress();
ext = '.br';
break;

default:
res.statusCode = 400;
res.end('Unsupported compression type');

return;
}

const compressedFileName = originalFileName + ext;

res.statusCode = 200;
res.setHeader('Content-Type', 'application/octet-stream');

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

const readStream = fs.createReadStream(filePath);

readStream.pipe(compressor).pipe(res);
});
} else if (req.method === 'GET' && req.url === '/') {
res.statusCode = 200;
res.setHeader('Content-type', 'text/html');

res.end(`<form method="POST" action="/compress" enctype="multipart/form-data">
<input name="file" type="file">
<select name="compressionType">
<option value="gzip">gzip</option>
<option value="deflate">deflate</option>
<option value="br">br</option>
</select>
<button type="submit">Submit</button>
</form>`);
} else if (req.method === 'GET' && req.url === '/compress') {
res.statusCode = 400;
res.end('GET not allowed');
} else {
res.statusCode = 404;
res.end('Not found');
}
});
}

module.exports = {
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