Re: [beast] I can't write a hello world server

From: Loup VAILLANT (l.vaillant_at_[hidden])
Date: 2024-04-08 07:04:08

> You are right, Asio and Asio based libraries are usually heavily
> templated as they need to work with generic executors, buffers and
> stream types. There are new facilities in Asio for alleviating this
> issue like any_executor and any_completion_handler which you can
> utilize to implement async operations in a source file.

I'll look into it, thanks. (Though thankfully the wrapper strategy does work, and has the advantage of accommodating other HTTP libraries.)


> You don't need to pass a socket to acceptor, it has multiple overloads:
> https://www.boost.org/doc/libs/1_84_0/doc/html/boost_asio/reference/basic_socket_acceptor/async_accept.html
> 
> One of them creates a socket and passes it to the completion token,
> so, you can use it like:
> acceptor.async_accept([](auto ec, auto socket){
>     // ...
> });

Oh of course, that makes sense now: there are two "types" of sockets:
- One that accepts connections (under some TCP port number)
- One that *already* accepted a connection, and can send & receive messages.

This API that creates the socket in the callback makes much more sense under this mental model.

Thank you,
Loup.