RESTinio

# What Is It?

RESTinio is a header-only C++14 library that gives you an embedded HTTP/Websocket server. It is based on standalone version of ASIO and targeted primarily for asynchronous processing of HTTP-requests.

# A Very Basic Example Of RESTinio

Consider the task of writing a C++ application that must support some REST API, RESTinio represents our solution for that task. Currently it is in stable beta state. Lets see how it feels like in the simplest case:

#include <iostream>
#include <restinio/all.hpp>
int main()
{
restinio::run(
restinio::on_this_thread()
.port(8080)
.address("localhost")
.request_handler([](auto req) {
return req->create_response().set_body("Hello, World!").done();
}));
return 0;
}
all.hpp
restinio::on_this_thread
run_on_this_thread_settings_t< Traits > on_this_thread()
A special marker for the case when http_server must be run on the context of the current thread.
Definition: http_server_run.hpp:123
restinio::run
void run(asio_ns::io_context &ioctx, run_on_this_thread_settings_t< Traits > &&settings)
Helper function for running http server until ctrl+c is hit.
Definition: http_server_run.hpp:216

Server runs on the main thread, and respond to all requests with hello-world message. Of course you've got an access to the structure of a given HTTP request, so you can apply a complex logic for handling requests.

# Features

- Async request handling. Cannot get the response data immediately? That's ok, store request handle somewhere and/or pass it to another execution context and get back to it when the data is ready.
- HTTP pipelining. Works well with async request handling. It might increase your server throughput dramatically.
- Timeout control. RESTinio can take care of bad connection that are like: send "GET /" and then just stuck.
- Response builders. Need chunked-encoded body - then RESTinio has a special response builder for you (obviously it is not the only builder).
- ExpressJS-like request routing.
- An experimental typesafe request router that allows avoiding problems of ExpressJS-like router with help of static checks from C++ compiler.
- A possibility to chain several request-handlers (somewhat similar to ExpressJS's middleware).
- Working with query string parameters.
- Several ready-to-use helpers for working with HTTP headers (for example, the support for HTTP headers related to file uploading).
- Supports sending files and its parts (with sendfile on linux/unix and TransmitFile on windows).
- Supports compression (deflate, gzip).
- Supports TLS (HTTPS).
- Basic websocket support. Simply restinio::websocket::basic::upgrade() the request handle and start websocket session on a corresponding connection.
- Can run on external asio::io_context. RESTinio is separated from execution context.
- Some tune options. One can set acceptor and socket options. When running RESTinio on a pool of threads connections can be accepted in parallel.

# License

RESTinio is distributed under BSD-3-CLAUSE license.

# How To Use It?

The full documentation for RESTinio can be found here.

# More

Issues and bugs: Issue Tracker on GitHub.