NNG_HTTP_SERVER_START(3http)

💅 NNG_HTTP_SERVER_START (3http) — bestie's guide to starting your HTTP server

okay so this is a page straight out of the NNG Reference Manual — you know the vibe, it's the C library that does the networking so you don't have to 😌 and today's main character is nng_http_server_start. Let's get into it 💖

✨ SYNOPSIS ✨

#include <nng/nng.h>
#include <nng/supplemental/http/http.h>

int nng_http_server_start(nng_http_server *server);

that's it. one function. one argument. she's lowkey simple and that's why we love her 🫶

🌸 DESCRIPTION 🌸

so nng_http_server_start() starts up the HTTP server instance you hand it in server. the way this works is: it makes the server bind to the appropriate TCP port, and then it starts accepting connections and handling HTTP requests. literally the glow-up moment where your server goes from "configured" to "actually doing stuff" 🔥

think of it as the "go live" button, no cap. before this, your server is just sitting there with main character energy but zero plot. after this? she's serving 👑

🎀 RETURN VALUES 🎀

sweet and simple: this function returns 0 on success, and non-zero otherwise. so if you get 0, congrats bestie, you ate 💅 if you get anything else, go check the errors section below, iykyk.

👑 ERRORS 👑

here's the vibe check on what can go wrong — all of these are the non-zero return values, fr fr:

• NNG_EADDRINUSE — the TCP port is unavailable. someone else already claimed it 😭 that port is taken, pick a different one or go find out who's squatting.
• NNG_EADDRINVAL — the server is configured with an invalid address. the address is giving nonsense, go fix your config 🙈
• NNG_ENOMEM — insufficient free memory exists. the machine is going through it, there's just not enough RAM to go around 💀
• NNG_ENOTSUP — HTTP not supported. like, at all. this build can't do HTTP, periodt. nothing you can do from here.

ngl, NNG_ENOTSUP is the saddest one — it's not a typo, it's not a config issue on your end, HTTP just isn't there. check how your NNG was built before you lose your mind 🧚

🦋 SEE ALSO 🦋

the whole friend group, go say hi:

• nng_http_server_hold(3http)
• nng_http_server_release(3http)
• nng_http_server_stop(3http)
• nng_url_parse(3)
• nng_strerror(3)
• nng(7)

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okay that's the whole page, you're officially an HTTP server starter 🌈 this cutie was brought to you by the NNG Reference Manual, dated 2026-01-13 — go forth and bind those ports bestie, ily, bye 💜✨🎀