POCO VS Mongoose

You can also look into Poco https://pocoproject.org/

I can't say enough good stuff about POCO for this type of work - when I first got my teams using it we used to joke that POCO was what Boost wants to be when it grows up. And nlohmann/json - cracking library for working with JSON in C++.

Did someone used Poco's Net Library to create a Rest Api? Poco Project

poco (portable components) https://pocoproject.org/

Many of the necessary fixes do end up getting pushed upstream, though, thinking especially of stuff like converting CMake projects to use the GNUInstallDirs standard, so there is a benefit to the strictness work that extends beyond even just the Nix community itself.

Of course, sometimes those kinds of changes just never get merged, for a variety of well-understood open-sourcey reasons, eg: https://github.com/pocoproject/poco/pull/3105

Depends. I'd recommend spending 15 minutes browsing the documentation for sys/socket.h so you know enough of the basics, and then get started with a high-level framework depending on your needs. libcurl is amazing, but might not be optimal for your use-case. It might also be worth considering learning Boost.Asio or the new experimental::net proposal for C++23. If you need a major, integrated solution as part of a larger app already using a toolkit, POCO or Qt can work well. ZeroMQ is also amazing for specialized cases.

POCO .............

I've found myself at this webpage multiple times while trying to minimize the complexity of APIs in my C projects.

My conclusion for now is that C coroutines are something to be left to the implementer. For example: Mongoose (https://github.com/cesanta/mongoose) uses event callbacks to deal with asynchronousness. It is much more pleasant to wrap a library like this in whatever thread/task primitives your system has rather than try to integrate the mythical cross-platform c couroutine.

I remember using mongoose 15 years back. Today i would have considered mongoose(10k+ stars) which is also a mature c/c++ web server[1] if not the licence.

https://github.com/cesanta/mongoose/tree/master/examples

Alternatives at the low to medium level of abstraction include civetweb and mongoose, which have a common ancestor. Both of these appear to be C rather than C++, but seem to be production quality and well-documented. Another C library is cpp-httplib, which is probably too low-level for me.

Since this is only going to be used internally would Mongoose be worth considering?

If you are looking for something simple there is mongoose from cesanta, https://github.com/cesanta/mongoose

The language is only part of it. In my opinion, you would learn even more about C by consuming well-known libraries written in C and trying to do something useful with it and complementing that with some books, etc rather than just learning the syntax and semantics of C.

There are tons of useful/fun things you could do with C. Write some desktop apps with GTK, a web server with Mongoose (https://mongoose.ws), etc.