| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/beast2 | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_BEAST2_SERVER_DETAIL_ANY_ROUTER_HPP | ||
| 11 | #define BOOST_BEAST2_SERVER_DETAIL_ANY_ROUTER_HPP | ||
| 12 | |||
| 13 | #include <boost/beast2/detail/config.hpp> | ||
| 14 | #include <boost/beast2/detail/call_traits.hpp> | ||
| 15 | #include <boost/beast2/detail/type_traits.hpp> | ||
| 16 | #include <boost/beast2/server/route_handler.hpp> | ||
| 17 | #include <boost/http_proto/method.hpp> | ||
| 18 | #include <boost/url/segments_encoded_view.hpp> | ||
| 19 | #include <boost/core/detail/string_view.hpp> | ||
| 20 | #include <type_traits> | ||
| 21 | |||
| 22 | namespace boost { | ||
| 23 | namespace beast2 { | ||
| 24 | |||
| 25 | struct route_state; | ||
| 26 | |||
| 27 | //------------------------------------------------ | ||
| 28 | |||
| 29 | namespace detail { | ||
| 30 | |||
| 31 | class any_router; | ||
| 32 | |||
| 33 | // handler kind constants | ||
| 34 | // 0 = unrecognized | ||
| 35 | // 1 = regular | ||
| 36 | // 2 = router | ||
| 37 | // 3 = error | ||
| 38 | |||
| 39 | template<class T, | ||
| 40 | class Req, class Res, class = void> | ||
| 41 | struct get_handler_kind | ||
| 42 | : std::integral_constant<int, 0> | ||
| 43 | { | ||
| 44 | }; | ||
| 45 | |||
| 46 | // route_result( Req&, Res& ) | ||
| 47 | template<class T, class Req, class Res> | ||
| 48 | struct get_handler_kind<T, Req, Res, | ||
| 49 | typename std::enable_if<detail::is_invocable< | ||
| 50 | T, route_result, Req&, Res&>::value>::type> | ||
| 51 | : std::integral_constant<int, 1> | ||
| 52 | { | ||
| 53 | }; | ||
| 54 | |||
| 55 | // route_result( Req&, Res&, route_state& ) | ||
| 56 | template<class T, class Req, class Res> | ||
| 57 | struct get_handler_kind<T, Req, Res, | ||
| 58 | typename std::enable_if<detail::derived_from< | ||
| 59 | T, any_router>::value>::type> | ||
| 60 | : std::integral_constant<int, 2> | ||
| 61 | { | ||
| 62 | }; | ||
| 63 | |||
| 64 | // route_result( Req&, Res&, system::error_code& | ||
| 65 | template<class T, class Req, class Res> | ||
| 66 | struct get_handler_kind<T, Req, Res, | ||
| 67 | typename std::enable_if<detail::is_invocable< | ||
| 68 | T, route_result, Req&, Res&, | ||
| 69 | system::error_code&>::value>::type> | ||
| 70 | : std::integral_constant<int, 3> | ||
| 71 | { | ||
| 72 | }; | ||
| 73 | |||
| 74 | //------------------------------------------------ | ||
| 75 | |||
| 76 | // implementation for all routers | ||
| 77 | class any_router | ||
| 78 | { | ||
| 79 | protected: | ||
| 80 | struct layer; | ||
| 81 | struct impl; | ||
| 82 | struct any_handler; | ||
| 83 | |||
| 84 | struct req_info | ||
| 85 | { | ||
| 86 | core::string_view& base_path; | ||
| 87 | core::string_view& path; | ||
| 88 | }; | ||
| 89 | |||
| 90 | using handler_ptr = std::unique_ptr<any_handler>; | ||
| 91 | |||
| 92 | template<class, class, class> | ||
| 93 | struct handler_impl; | ||
| 94 | |||
| 95 | any_router() = default; | ||
| 96 | |||
| 97 | BOOST_BEAST2_DECL ~any_router(); | ||
| 98 | BOOST_BEAST2_DECL any_router(any_router&&) noexcept; | ||
| 99 | BOOST_BEAST2_DECL any_router(any_router const&) noexcept; | ||
| 100 | BOOST_BEAST2_DECL any_router& operator=(any_router&&) noexcept; | ||
| 101 | BOOST_BEAST2_DECL any_router& operator=(any_router const&) noexcept; | ||
| 102 | BOOST_BEAST2_DECL any_router(req_info(*)(void*)); | ||
| 103 | BOOST_BEAST2_DECL std::size_t count() const noexcept; | ||
| 104 | BOOST_BEAST2_DECL route_result dispatch_impl(http_proto::method, | ||
| 105 | urls::url_view const&, void*, void*, route_state& st) const; | ||
| 106 | BOOST_BEAST2_DECL route_result dispatch_impl( | ||
| 107 | void*, void*, route_state&) const; | ||
| 108 | BOOST_BEAST2_DECL route_result resume( | ||
| 109 | void*, void*, route_state&, route_result const& ec) const; | ||
| 110 | BOOST_BEAST2_DECL void append(bool, http_proto::method, | ||
| 111 | core::string_view, handler_ptr); | ||
| 112 | BOOST_BEAST2_DECL void append(core::string_view, any_router&); | ||
| 113 | void append(bool, http_proto::method, core::string_view) {} | ||
| 114 | |||
| 115 | impl* impl_ = nullptr; | ||
| 116 | }; | ||
| 117 | |||
| 118 | //------------------------------------------------ | ||
| 119 | |||
| 120 | struct BOOST_SYMBOL_VISIBLE | ||
| 121 | any_router::any_handler | ||
| 122 | { | ||
| 123 | BOOST_BEAST2_DECL virtual ~any_handler(); | ||
| 124 | BOOST_BEAST2_DECL virtual | ||
| 125 | std::size_t count() const noexcept = 0 ; | ||
| 126 | virtual route_result invoke( | ||
| 127 | void*, void*, route_state&, | ||
| 128 | system::error_code*) const = 0; | ||
| 129 | }; | ||
| 130 | |||
| 131 | // wrapper for route handlers | ||
| 132 | template<class Req, class Res, class H> | ||
| 133 | struct any_router:: | ||
| 134 | handler_impl : any_handler | ||
| 135 | { | ||
| 136 | typename std::decay<H>::type h; | ||
| 137 | |||
| 138 | template<class... Args> | ||
| 139 | 18 | handler_impl(Args&&... args) | |
| 140 | 18 | : h(std::forward<Args>(args)...) | |
| 141 | { | ||
| 142 | 18 | } | |
| 143 | |||
| 144 | std::size_t | ||
| 145 | ✗ | count() const noexcept override | |
| 146 | { | ||
| 147 | ✗ | return count(get_handler_kind< | |
| 148 | ✗ | decltype(h), Req, Res>{}); | |
| 149 | } | ||
| 150 | |||
| 151 | route_result | ||
| 152 | 14 | invoke( | |
| 153 | void* req, void* res, | ||
| 154 | route_state& st, | ||
| 155 | system::error_code* pec) const override | ||
| 156 | { | ||
| 157 | 28 | return invoke( | |
| 158 | *reinterpret_cast<Req*>(req), | ||
| 159 | *reinterpret_cast<Res*>(res), | ||
| 160 | st, pec, get_handler_kind< | ||
| 161 | 14 | decltype(h), Req, Res>{}); | |
| 162 | } | ||
| 163 | |||
| 164 | private: | ||
| 165 | std::size_t count( | ||
| 166 | std::integral_constant<int, 0>) const = delete; | ||
| 167 | |||
| 168 | ✗ | std::size_t count( | |
| 169 | std::integral_constant<int, 1>) const noexcept | ||
| 170 | { | ||
| 171 | ✗ | return 1; | |
| 172 | } | ||
| 173 | |||
| 174 | std::size_t count( | ||
| 175 | std::integral_constant<int, 2>) const noexcept | ||
| 176 | { | ||
| 177 | return h.count(); | ||
| 178 | } | ||
| 179 | |||
| 180 | std::size_t count( | ||
| 181 | std::integral_constant<int, 3>) const noexcept | ||
| 182 | { | ||
| 183 | return 1; | ||
| 184 | } | ||
| 185 | |||
| 186 | route_result | ||
| 187 | invoke(Req&, Res&, route_state&, | ||
| 188 | system::error_code*, | ||
| 189 | std::integral_constant<int, 0>) const = delete; | ||
| 190 | |||
| 191 | route_result | ||
| 192 | 7 | invoke(Req& req, Res& res, route_state&, | |
| 193 | system::error_code* pec, | ||
| 194 | std::integral_constant<int, 1>) const | ||
| 195 | { | ||
| 196 | 7 | if(! pec) | |
| 197 | 7 | return h(req, res); | |
| 198 | ✗ | return route::next; | |
| 199 | } | ||
| 200 | |||
| 201 | route_result | ||
| 202 | invoke(Req& req, Res& res, route_state& st, | ||
| 203 | system::error_code* pec, | ||
| 204 | std::integral_constant<int, 2>) const | ||
| 205 | { | ||
| 206 | if(! pec) | ||
| 207 | return h.dispatch(&req, &res, st); | ||
| 208 | return route::next; | ||
| 209 | } | ||
| 210 | |||
| 211 | route_result | ||
| 212 | invoke(Req& req, Res& res, route_state&, | ||
| 213 | system::error_code* pec, | ||
| 214 | std::integral_constant<int, 3>) const | ||
| 215 | { | ||
| 216 | if(pec != nullptr) | ||
| 217 | return h(req, res, *pec); | ||
| 218 | return route::next; | ||
| 219 | } | ||
| 220 | }; | ||
| 221 | |||
| 222 | } // detail | ||
| 223 | } // beast2 | ||
| 224 | } // boost | ||
| 225 | |||
| 226 | #endif | ||
| 227 |