85 lines
1.6 KiB
C++
85 lines
1.6 KiB
C++
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#ifndef seafire__server__middleware_hxx_
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#define seafire__server__middleware_hxx_
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#include <seafire/server/request-handler.hxx>
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#include <memory>
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#include <vector>
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namespace seafire::server
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{
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/// Implements middleware functionality.
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///
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class middleware_t
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{
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public:
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template<typename T>
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middleware_t(T handler)
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: handler_{std::make_shared<container_t<T>>(std::move(handler))}
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{}
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void
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invoke(request_t&, response_t&, request_handler_t const&) const;
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template<typename, typename... Args>
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friend
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middleware_t
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make_middleware(Args&&...);
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private:
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struct concept_t
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{
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virtual
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~concept_t() noexcept = default;
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virtual
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void
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invoke(request_t&, response_t&, request_handler_t const&) const = 0;
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};
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template<typename T>
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struct container_t
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: concept_t
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{
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template<typename... Args>
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container_t(Args&&... args)
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: handler{std::forward<Args>(args)...}
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{}
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void
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invoke(request_t& req,
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response_t& res,
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request_handler_t const& next) const override
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{
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handler(req, res, next);
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}
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T handler;
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};
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explicit
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middleware_t(std::shared_ptr<concept_t const>);
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std::shared_ptr<concept_t const> handler_;
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};
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template<typename T, typename... Args>
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middleware_t
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make_middleware(Args&&... args)
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{
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return middleware_t{
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std::make_shared<middleware_t::container_t<T>>(std::forward<Args>(args)...)
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};
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}
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request_handler_t
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make_middleware(std::vector<middleware_t> const&, request_handler_t);
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} // namespace seafire::server
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#endif
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