added crow

2025-12-14 21:34:10 +01:00
parent 8df3c5479b
commit 6f1d51cabc
39 changed files with 15400 additions and 0 deletions
--- a/include/crow/middleware_context.h
+++ b/include/crow/middleware_context.h
@@ -0,0 +1,60 @@
+#pragma once
+
+#include "crow/utility.h"
+#include "crow/http_request.h"
+#include "crow/http_response.h"
+
+namespace crow
+{
+    namespace detail
+    {
+
+
+        template<typename... Middlewares>
+        struct partial_context : public black_magic::pop_back<Middlewares...>::template rebind<partial_context>, public black_magic::last_element_type<Middlewares...>::type::context
+        {
+            using parent_context = typename black_magic::pop_back<Middlewares...>::template rebind<::crow::detail::partial_context>;
+            template<int N>
+            using partial = typename std::conditional<N == sizeof...(Middlewares) - 1, partial_context, typename parent_context::template partial<N>>::type;
+
+            template<typename T>
+            typename T::context& get()
+            {
+                return static_cast<typename T::context&>(*this);
+            }
+        };
+
+
+
+        template<>
+        struct partial_context<>
+        {
+            template<int>
+            using partial = partial_context;
+        };
+
+
+        template<typename... Middlewares>
+        struct context : private partial_context<Middlewares...>
+        //struct context : private Middlewares::context... // simple but less type-safe
+        {
+            template<typename CallCriteria, int N, typename Context, typename Container>
+            friend typename std::enable_if<(N == 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res);
+            template<typename CallCriteria, int N, typename Context, typename Container>
+            friend typename std::enable_if<(N > 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res);
+
+            template<typename CallCriteria, int N, typename Context, typename Container>
+            friend typename std::enable_if<(N < std::tuple_size<typename std::remove_reference<Container>::type>::value), bool>::type
+              middleware_call_helper(const CallCriteria& cc, Container& middlewares, request& req, response& res, Context& ctx);
+
+            template<typename T>
+            typename T::context& get()
+            {
+                return static_cast<typename T::context&>(*this);
+            }
+
+            template<int N>
+            using partial = typename partial_context<Middlewares...>::template partial<N>;
+        };
+    } // namespace detail
+} // namespace crow