MiddlewareDispatcher.cpp

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "express/dispatcher/MiddlewareDispatcher.h"
 
#include "express/MountPoint.h"
#include "express/Next.h"
#include "express/Request.h"
#include "express/dispatcher/regex_utils.h"
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace express::dispatcher {
 
    MiddlewareDispatcher::MiddlewareDispatcher(
        const std::function<void(const std::shared_ptr<Request>&, const std::shared_ptr<Response>&, express::Next&)>& lambda)
        : lambda(lambda) {
    }
 
    bool MiddlewareDispatcher::dispatch(express::Controller& controller, const std::string& parentMountPath, const MountPoint& mountPoint) {
        bool dispatched = false;
 
        if ((controller.getFlags() & Controller::NEXT) == 0) {
            const std::string absoluteMountPath = path_concat(parentMountPath, mountPoint.relativeMountPath);
 
            if (((controller.getRequest()->path.rfind(absoluteMountPath, 0) == 0 ||
                  controller.getRequest()->url.rfind(absoluteMountPath, 0) == 0) &&
                 mountPoint.method == "use") ||
                ((absoluteMountPath == controller.getRequest()->url || absoluteMountPath == controller.getRequest()->path ||
                  checkForUrlMatch(absoluteMountPath, controller.getRequest()->url)) &&
                 (controller.getRequest()->method == mountPoint.method || mountPoint.method == "all"))) {
                dispatched = true;
 
                if (hasResult(absoluteMountPath)) {
                    setParams(absoluteMountPath, *controller.getRequest());
                }
 
                Next next(controller);
                lambda(controller.getRequest(), controller.getResponse(), next);
 
                // If next() was called synchronously continue current route-tree traversal
                if ((next.controller.getFlags() & express::Controller::NEXT) != 0) {
                    dispatched = false;
                    controller = next.controller;
                }
            }
        }
 
        return dispatched;
    }
 
} // namespace express::dispatcher