Review Summary

Your solution is approved because it fulfills all the functional requirements and correctly implements the compression server and HTML form behavior described in the task. The form includes the required file input, compressionType select with gzip, deflate, and br, and posts via POST to /compress with multipart/form-data, which aligns with [CHECKLIST ITEMS #1–#4]. On the server side, you correctly use Node streams, pipeline, and zlib (createGzip, createDeflate, createBrotliCompress) to compress the uploaded file and return it with the original name plus the appropriate extension (e.g., file.txt.gz), satisfying [CHECKLIST ITEMS #5–#9, #15].

HTTP handling is also correct: valid submissions return a 200 with the compressed stream, unknown endpoints return 404, GET /compress returns 400, and invalid form cases (missing file or unsupported compression type) are handled with 400 responses, covering [CHECKLIST ITEMS #11–#14]. The remaining points are minor quality issues, not blockers: in createServer.js, the pipeline callback currently ignores err (consider logging or sending a 500), and the "Non found" 404 message has a small typo. In your CSS, the nested & input selector looks like SCSS syntax and might not work in plain CSS without preprocessing; flattening it to a standard selector (e.g., .form-row input { ... }) would improve compatibility. Overall, you’ve implemented the core logic cleanly and met the specification; these minor tweaks would just polish the solution further.

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