Lightweight C++23 S3 client with no extra deps (just curl and OpenSSL)
Details
- External ID
- 48518923
- Source
- HN
- Company
- —
- Product
- Lightweight C++23 S3 client with no extra deps (just curl and OpenSSL)
- Website domain
- github.com
- Launched
- June 13, 2026
- Cohort
- —
- Upvotes
- 5
- Upvotes percentile
- 0.12568306010928962
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
Attached is my attempt at making a small toy S3 client without any other dependency besides libcurl and OpenSSL. Was tested mainly on MinIO (RIP) locally, so I would expect some bugs when using it against AWS, although I was able to play with it on some open access bucketsBe aware that I am not a C++ programmer and this project was indeed done to learn a bit of C++ myself :')Feedback on any of the code, either on gtest, or the benchmarking section or the core itself is welcome!
Enrichment
- Theme
- self-hosted infrastructure and security tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- lightweight c++23 s3 client
- Manually corrected
- False
Could you build this?
Yes A minimal S3 client in modern C++ only needs to construct HTTP requests, calculate AWS SigV4 hashes with OpenSSL, and execute calls using libcurl.
Discussion
5 comments analyzed.
Competitors mentioned: Go (for asynchronous performance)
Concerns raised: Binary size bloat from curl and OpenSSL dependencies (2-3mb), Synchronous architecture limits performance
Feature requests: Asynchronous/coroutine-based data fetching, C++26 reflection for XML FSM parser
Competitors
Other products that read as similar to this one — 228 launches clear the similarity bar, closest 8 shown.
Attention rank: #196 of 229 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 226 days after the earliest competitor.
- I built an HTTP client that perfectly mimics Chrome 142 · hn · 2025-11-08 · 39 upvotes · similarity 0.50
- Skouriasmeno Papaki · hn · 2025-12-16 · 5 upvotes · similarity 0.49
- geektls · github · 2026-09-24 · 10 upvotes · similarity 0.45
- Minikv · hn · 2026-02-03 · 71 upvotes · similarity 0.45
- Fast and lightweight hash implementations (xdigest) · hn · 2026-02-19 · 5 upvotes · similarity 0.45
- Chuchu, an Android SSH client built on libghostty · hn · 2026-05-09 · 13 upvotes · similarity 0.43
- I built an HTTP/2 server in C++ to learn the protocol and language · hn · 2026-01-04 · 11 upvotes · similarity 0.43
- Minikv · hn · 2026-01-17 · 35 upvotes · similarity 0.42
Other launches for this product
- No other launches for this product.
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