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uNetworking

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uWebSockets
Simple, secure & standards compliant web server for the most demanding of applications

C++ · 18990 stars
uWebSockets.js
μWebSockets for Node.js back-ends :metal:

C++ · 9157 stars
uSockets
Miniscule cross-platform eventing, networking & crypto for async applications

C · 1496 stars

Beginner friendly Everything

Open All

Cache invalidation use cases and interface Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

uNetworking/uWebSockets.js#1324 · 24 comments · Opened Sep 19, 2026
Some caching features Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

uNetworking/uWebSockets#1945 · 3 comments · Opened Sep 18, 2026
ESM_wrapper.mjs is hardcoded and out of date; auto-generate it in CI Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

uNetworking/uWebSockets.js#1314 · 2 comments · Opened Sep 16, 2026
pnpm now refuses uWebSockets.js as a transitive dependency: would you reconsider npm, or allow a mirror? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets.js#1312 · 8 comments · Opened Sep 14, 2026
Microcaching Open

big stuff experimental feedback

Difficulty 5/5 Over a week Newbie friendliness 30/100

uNetworking/uWebSockets.js#1311 · 3 comments · 2 reactions · Opened Sep 14, 2026
`connect()` blocks for ~21 seconds on Windows when server is unreachable (SYN dropped) Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

uNetworking/uSockets#259 · Opened Sep 8, 2026
`on_open` incorrectly called on Windows when TCP connection is refused (RST) Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

uNetworking/uSockets#258 · Opened Sep 8, 2026
Chunked encoding parser fixes Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

uNetworking/uWebSockets#1936 · Opened Aug 15, 2026
sanitizeHeader helper function for writeHeader echoes Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

uNetworking/uWebSockets.js#1299 · 1 comment · Opened Aug 15, 2026
io_uring backend silently drops WebSocket messages above ~2KB( works reliably on epoll) Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

uNetworking/uWebSockets#1931 · 5 comments · Opened Jul 22, 2026
udp_benchmark can work on mac os Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

uNetworking/uSockets#256 · 1 reaction · Opened Jul 10, 2026
Runtime SSL certificate hot reload without restart Open

FAQ question

Difficulty 5/5 Over a week Newbie friendliness 45/100

uNetworking/uWebSockets.js#1289 · 6 comments · 1 reaction · Opened Jun 12, 2026
Unbounded strcpy into sockaddr_un.sun_path in bsd_create_listen_socket_unix / bsd_create_connect_socket_unix (stack buffer overflow) Open

enhancement help wanted

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

uNetworking/uSockets#252 · 5 comments · Opened Jun 2, 2026
Client Support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets#1920 · 1 comment · Opened Mar 29, 2026
Disable logs ("finding/Browsed to SNI") Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

uNetworking/uSockets#255 · 2 comments · 1 reaction · Opened Mar 25, 2026
The us_socket_context_connect function is not working properly. Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

uNetworking/uSockets#250 · Opened Mar 9, 2026
Domain and add serverName to work without ssl? Open

low priority

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1909 · 2 comments · Opened Mar 8, 2026
Security: Committed private keys in `uWebSockets/misc` trigger compliance failures Open

low priority

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1906 · 3 comments · Opened Feb 9, 2026
Liburing, HTTP/2, KTLS Support (FORK) Created Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

uNetworking/uSockets#247 · 4 comments · Opened Oct 28, 2025
Stopping http takes 1 second Open

FAQ

Difficulty 4/5 3-5 days Newbie friendliness 30/100

uNetworking/uWebSockets#1887 · 10 comments · Opened Aug 27, 2025
No option in build.c to enable simdutf support Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

uNetworking/uWebSockets#1886 · 1 comment · Opened Aug 24, 2025
Allow specifying a WS closing code to TemplatedApp.close() Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1911 · 3 comments · Opened Aug 20, 2025
Issue with performance and compilation Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uSockets#246 · 5 comments · Opened Aug 9, 2025
Modernize source for Openssl # Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

uNetworking/uSockets#242 · 2 reactions · Opened Jun 14, 2025
Double-Free of UserData when gracefully closing a Websocket from Server-Side Open

medium priority

Difficulty 4/5 3-5 days Newbie friendliness 42/100

uNetworking/uWebSockets#1863 · 8 comments · Opened Jun 12, 2025
Invoking `endWithoutBody` with a size, without invoking `onAborted` is forbidden Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

uNetworking/uWebSockets#1855 · 4 comments · Opened May 6, 2025
setYield(true) in last handler does not trigger 404 response Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

uNetworking/uWebSockets.js#1164 · 1 comment · Opened Apr 21, 2025
Compiler fail when I set WITH_BORINGSSL=1 and WITH_IO_URING=1 make Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1848 · 1 comment · Opened Mar 15, 2025
Is is possible to load security data from memory ? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uSockets#238 · 1 reaction · Opened Mar 3, 2025
us_listen_socket_close crashes with memory error Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

uNetworking/uSockets#237 · Opened Jan 20, 2025
Debug stuff left in Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

uNetworking/uSockets#236 · 2 comments · Opened Dec 29, 2024
HttpRequest::getMethod modifies request Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

uNetworking/uWebSockets#1826 · Opened Dec 18, 2024
Using SNI switching does not work if client verification is used in one of the "virtual" servers Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uSockets#234 · Opened Dec 14, 2024
H3App Failed to Run Open

experimental feedback

Difficulty 4/5 3-5 days Newbie friendliness 25/100

uNetworking/uWebSockets.js#1101 · 2 comments · 6 reactions · Opened Sep 5, 2024
Method to indicate that request has body Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1910 · 21 comments · Opened Aug 21, 2024
How to configure keep-alive for uWs.App()? Open

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

uNetworking/uWebSockets#1912 · 7 comments · 3 reactions · Opened Jul 17, 2024
Compilation issue when using WSL Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

uNetworking/uSockets#223 · 1 comment · 2 reactions · Opened Jun 16, 2024
TLS peer certificate Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets.js#1058 · 5 comments · 1 reaction · Opened May 16, 2024
Update boringSSL Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

uNetworking/uSockets#221 · 5 comments · 2 reactions · Opened Mar 31, 2024
Auto compression for HTTP and use zstd Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets.js#1039 · 10 comments · 7 reactions · Opened Mar 18, 2024
HttpRequest that survives past async functions Open

big stuff enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

uNetworking/uWebSockets.js#1036 · 32 comments · 1 reaction · Opened Mar 15, 2024
Support Proxy protocol v1 Open

proxy

Difficulty 4/5 3-5 days Newbie friendliness 28/100

uNetworking/uWebSockets#1715 · Opened Feb 22, 2024
Proxy protocol support does not handle proxy payload arriving before TLS Open

proxy

Difficulty 5/5 Over a week Newbie friendliness 30/100

uNetworking/uWebSockets#1714 · 8 comments · Opened Feb 22, 2024
Failed to bind to 0.0.0.0 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

uNetworking/uSockets#219 · 1 comment · Opened Feb 15, 2024
works with letsencrypt ? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

uNetworking/uSockets#218 · 3 comments · Opened Feb 12, 2024
Build fails without -fPIC flag supplied from outside Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

uNetworking/uSockets#217 · Opened Feb 3, 2024
App.filter should emit decrement when upgrading to websocket Open

API-breaking

Difficulty 4/5 3-5 days Newbie friendliness 35/100

uNetworking/uWebSockets#1704 · 1 reaction · Opened Jan 29, 2024
Tests fail to compile: error: comparison between pointer and integer ('void *' and 'int') Open

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

uNetworking/uSockets#213 · 2 comments · Opened Jan 10, 2024
Allow for dynamically-generated certificates, keys, etc. Open

enhancement low priority

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets.js#1006 · 1 comment · 1 reaction · Opened Jan 5, 2024
CONNECT and HTTP Proxy Open

Http out of scope

Difficulty 5/5 Over a week Newbie friendliness 25/100

uNetworking/uWebSockets#1676 · 4 comments · Opened Nov 23, 2023

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