We would like to announce next release of RESTinio a header-only C++14 library that gives you an embedded HTTP server with nice express-like routing (although it is not mandatory to use router) and websockets on board. See of previous release on reddit.

What's new:

• Timer manager concept introduced. Timers performance improved.
• Express router: introduce a concept of regex engine, so express router can run on pcre/pcre2 engines or the one provided by user. For example you can use PCRE library for regex:

      using router_t = restinio::router::express_router_t< restinio::router::pcre_regex_engine_t >;
  
        auto router = std::make_unique< router_t >();
  
        router->http_get(
          "/:id(\d{8})/:tag",
          []( auto req, auto params ){
            // Handle request.
          } );
  
        // Add more routes ...

• Express router: introducing functions for converting route parameters to a specific type (if conversion is available).

      router->http_get(
            "/search/:user_id(\d{8})/:tag",
            []( auto req, auto params ){
             const auto id = restinio::cast_as< unsigned int >(params["user_id"]);
             const auto tag = restinio::cast_as< std::string >(params["tag"]);
  
             const auto posts = get_users_posts( id, tag );
  
             if( posts.empty() )
              return req->create_response( 404, "Not found")
                .append_header( "Server", "RESTinio routers example" )
                .append_header_date_field()
                .connection_close()
                .done();
  
              // Has posts
              return write_posts_response( std::move( req ), posts );
          } );

• Express router: getting rid of using strings for storing parameters keys and values in route_params_t and using string_view (std::string_view if available).
• Express router: update route to regex processing in order to stick with path-to-regexp project.
• Express router: a handler for non matched request can be set.

      router->non_matched_request_handler(
          []( auto req ){
            return
              req->create_response( 404, "Not found")
                .append_header_date_field()
                .connection_close()
                .done();
          } );

• Express router: add a benchmark for testing performance on a given set of routes (described in file), this makes it possible to do quick benchmark of RESTinio+router performance on a given set of routes.
• Improve query string params. Parsed parameters stored as string_view objects, thus requiring less space and less allocations.
• Add benchmarks: add benchmarks for a single handler servers.
• Add cmake support for SObjectizer dependent test and samples.
• Documentation moved here.