SNode.C
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MiddlewareDispatcher.cpp
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1/*
2 * SNode.C - A Slim Toolkit for Network Communication
3 * Copyright (C) Volker Christian <me@vchrist.at>
4 * 2020, 2021, 2022, 2023, 2024, 2025
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License as published
8 * by the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20/*
21 * MIT License
22 *
23 * Permission is hereby granted, free of charge, to any person obtaining a copy
24 * of this software and associated documentation files (the "Software"), to deal
25 * in the Software without restriction, including without limitation the rights
26 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
27 * copies of the Software, and to permit persons to whom the Software is
28 * furnished to do so, subject to the following conditions:
29 *
30 * The above copyright notice and this permission notice shall be included in
31 * all copies or substantial portions of the Software.
32 *
33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
39 * THE SOFTWARE.
40 */
41
42#include "express/dispatcher/MiddlewareDispatcher.h"
43
44#include "core/socket/stream/SocketConnection.h"
45#include "express/Next.h"
46#include "express/Request.h"
47#include "express/Response.h"
48#include "express/Route.h"
49#include "express/dispatcher/regex_utils.h"
50#include "web/http/server/SocketContext.h"
51
52#ifndef DOXYGEN_SHOULD_SKIP_THIS
53
54#include "log/Logger.h"
55
56#include <list>
57
58#endif /* DOXYGEN_SHOULD_SKIP_THIS */
59
60namespace express::dispatcher {
61
63 const std::function<void(const std::shared_ptr<Request>&, const std::shared_ptr<Response>&, express::Next&)>& lambda)
64 : lambda(lambda) {
65 }
66
67 bool MiddlewareDispatcher::dispatch(express::Controller& controller, const std::string& parentMountPath, const MountPoint& mountPoint) {
68 bool requestMatched = false;
69
70 if ((controller.getFlags() & Controller::NEXT) == 0) {
71 const std::string absoluteMountPath = parentMountPath + mountPoint.relativeMountPath;
72
73 const std::string requestMethod = controller.getRequest()->method;
74 const std::string requestUrl = controller.getRequest()->url;
75 const std::string requestPath = controller.getRequest()->path;
76
77 // clang-format off
78 requestMatched =
79 (
80 (
81 (
82 mountPoint.method == requestMethod
83 ) || (
84 mountPoint.method == "all"
85 )
86 ) && (
87 (
88 requestUrl == absoluteMountPath
89 ) || (
90 (
91 !controller.getStrictRouting()
92 ) && (
93 requestPath.starts_with(absoluteMountPath)
94 )
95 ) || (
96 checkForUrlMatch(absoluteMountPath, requestUrl)
97 )
98 )
99 ) || (
100 (
101 mountPoint.method == "use"
102 ) && (
103 (
104 requestUrl.starts_with(absoluteMountPath)
105 )
106 )
107 );
108 // clang-format on
109
111 << " HTTP Express: middleware -> " << (requestMatched ? "MATCH" : "NO MATCH");
112 LOG(TRACE) << " RequestMethod: " << controller.getRequest()->method;
113 LOG(TRACE) << " RequestUrl: " << controller.getRequest()->url;
114 LOG(TRACE) << " RequestPath: " << controller.getRequest()->path;
115 LOG(TRACE) << " AbsoluteMountPath: " << absoluteMountPath;
116 LOG(TRACE) << " StrictRouting: " << controller.getStrictRouting();
117 LOG(TRACE) << " StrictRouting: " << controller.getStrictRouting();
118
119 if (requestMatched) {
120 if (hasResult(absoluteMountPath)) {
121 setParams(absoluteMountPath, *controller.getRequest());
122 }
123
124 Next next(controller);
125 lambda(controller.getRequest(), controller.getResponse(), next);
126
127 // If next() was called synchronously continue current route-tree traversal
128 if ((next.controller.getFlags() & express::Controller::NEXT) != 0) {
129 LOG(TRACE) << "Express: M - Next called - set to NO MATCH";
130 requestMatched = false;
131 controller = next.controller;
132 }
133 }
134 }
135
136 return requestMatched;
137 }
138
139 std::list<std::string>
140 MiddlewareDispatcher::getRoutes(const std::string& parentMountPath, const MountPoint& mountPoint, bool strictRouting) const {
141 std::list<std::string> routes{"M " + parentMountPath + mountPoint.relativeMountPath + (!strictRouting ? "*" : "")};
142 routes.push_back(" " + mountPoint.method + " " + mountPoint.relativeMountPath);
143
144 if (nextRoute) {
145 routes.splice(routes.end(), nextRoute->getRoute(parentMountPath, strictRouting));
146 }
147
148 return routes;
149 }
150
151} // namespace express::dispatcher
const std::string & getConnectionName() const
SocketConnection * getSocketConnection() const
const std::shared_ptr< Request > & getRequest()
bool getStrictRouting() const
Controller & operator=(const Controller &controller) noexcept
const std::shared_ptr< Response > & getResponse()
std::shared_ptr< Route > nextRoute
Definition Dispatcher.h:78
Next(Controller &controller)
Definition Next.cpp:52
Controller controller
Definition Next.h:66
std::string url
Definition Request.h:96
std::string method
Definition Request.h:95
std::string path
Definition Request.h:77
web::http::server::SocketContext * getSocketContext() const
Definition Response.cpp:64
std::list< std::string > getRoute(const std::string &parentMountPath, bool strictRouting) const
Definition Route.cpp:114
bool dispatch(express::Controller &controller, const std::string &parentMountPath, const express::MountPoint &mountPoint) override
MiddlewareDispatcher(const std::function< void(const std::shared_ptr< Request > &, const std::shared_ptr< Response > &, express::Next &)> &lambda)
std::list< std::string > getRoutes(const std::string &parentMountPath, const MountPoint &mountPoint, bool strictRouting) const override
const std::function< void(const std::shared_ptr< Request > &, const std::shared_ptr< Response > &, express::Next &)> lambda
bool checkForUrlMatch(const std::string &cpath, const std::string &reqpath)
void setParams(const std::string &cpath, Request &req)
bool hasResult(const std::string &cpath)
std::string method
Definition MountPoint.h:56
std::string relativeMountPath
Definition MountPoint.h:57