echoserver.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, 2026
 *
 * 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/>.
 */
 
/*
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
 
#include "express/legacy/in/WebApp.h"
#include "express/middleware/VerboseRequest.h"
#include "express/tls/in/WebApp.h"
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include "log/Logger.h"
 
#include <algorithm>
#include <cstring>
#include <list>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
using namespace express;
 
int main(int argc, char* argv[]) {
    express::WebApp::init(argc, argv);
 
    using LegacyWebApp = express::legacy::in::WebApp;
    using Request = LegacyWebApp::Request;
    using Response = LegacyWebApp::Response;
    using SocketAddress = LegacyWebApp::SocketAddress;
 
    const LegacyWebApp legacyApp("legacy");
 
    legacyApp.use(express::middleware::VerboseRequest());
 
    legacyApp.get("/ws", [](const std::shared_ptr<Request>& req, const std::shared_ptr<Response>& res) {
        const std::string connectionName = res->getSocketContext()->getSocketConnection()->getConnectionName();
 
        res->upgrade(req, [req, res, connectionName](const std::string& name) {
            if (!name.empty()) {
                VLOG(1) << connectionName << ": Successful upgrade:";
                VLOG(1) << connectionName << ":   Requested: " << req->get("upgrade");
                VLOG(1) << connectionName << ":    Selected: " << name;
 
                res->end();
            } else {
                VLOG(1) << connectionName << ": Can not upgrade to any of '" << req->get("upgrade") << "'";
 
                res->sendStatus(404);
            }
        });
    });
 
    legacyApp.get("/", [] APPLICATION(req, res) {
        VLOG(1) << "HTTP GET on "
                << "/";
        if (req->url == "/" || req->url == "/index.html") {
            req->url = "/wstest.html";
        }
 
        VLOG(1) << CMAKE_CURRENT_SOURCE_DIR "/html" + req->url;
        res->sendFile(CMAKE_CURRENT_SOURCE_DIR "/html" + req->url, [req, res](int errnum) {
            if (errnum == 0) {
                VLOG(1) << req->url;
            } else {
                VLOG(1) << "HTTP response send file failed: " << std::strerror(errnum);
                res->sendStatus(404);
            }
        });
    });
 
    legacyApp
        .listen([instanceName = legacyApp.getConfig()->getInstanceName()](const SocketAddress& socketAddress,
                                                                          const core::socket::State& state) {
            switch (state) {
                case core::socket::State::OK:
                    VLOG(1) << instanceName << " listening on '" << socketAddress.toString() << "'";
                    break;
                case core::socket::State::DISABLED:
                    VLOG(1) << instanceName << " disabled";
                    break;
                case core::socket::State::ERROR:
                    VLOG(1) << instanceName << " " << socketAddress.toString() << ": " << state.what();
                    break;
                case core::socket::State::FATAL:
                    VLOG(1) << instanceName << " " << socketAddress.toString() << ": " << state.what();
                    break;
            }
        })
        .getFlowController();
 
    VLOG(1) << "Legacy Routes:";
    for (std::string& route : legacyApp.getRoutes()) {
        route.erase(std::remove(route.begin(), route.end(), '$'), route.end());
 
        VLOG(1) << "  " << route;
    }
 
    {
        using TlsWebApp = express::tls::in::WebApp;
        using Request = TlsWebApp::Request;
        using Response = TlsWebApp::Response;
        using SocketAddress = TlsWebApp::SocketAddress;
 
        const TlsWebApp tlsApp("tls");
 
        tlsApp.use(express::middleware::VerboseRequest());
 
        tlsApp.get("/ws", [](const std::shared_ptr<Request>& req, const std::shared_ptr<Response>& res) {
            const std::string connectionName = res->getSocketContext()->getSocketConnection()->getConnectionName();
 
            res->upgrade(req, [req, res, connectionName](const std::string& name) {
                if (!name.empty()) {
                    VLOG(1) << connectionName << ": Upgrade success:";
                    VLOG(1) << connectionName << ":   Requested: " << req->get("upgrade");
                    VLOG(1) << connectionName << ":    Selected: " << name;
 
                    res->end();
                } else {
                    VLOG(1) << connectionName << ": Can not upgrade to any of '" << req->get("upgrade") << "'";
 
                    res->sendStatus(404);
                }
            });
        });
 
        tlsApp.get("/", [] APPLICATION(req, res) {
            if (req->url == "/" || req->url == "/index.html") {
                req->url = "/wstest.html";
            }
 
            VLOG(1) << CMAKE_CURRENT_SOURCE_DIR "/html" + req->url;
            res->sendFile(CMAKE_CURRENT_SOURCE_DIR "/html" + req->url, [req, res](int errnum) {
                if (errnum == 0) {
                    VLOG(1) << req->url;
                } else {
                    VLOG(1) << "HTTP response send file failed: " << std::strerror(errnum);
                    res->sendStatus(404);
                }
            });
        });
 
        tlsApp
            .listen([instanceName = tlsApp.getConfig()->getInstanceName()](const SocketAddress& socketAddress,
                                                                           const core::socket::State& state) {
                switch (state) {
                    case core::socket::State::OK:
                        VLOG(1) << instanceName << " listening on '" << socketAddress.toString() << "'";
                        break;
                    case core::socket::State::DISABLED:
                        VLOG(1) << instanceName << " disabled";
                        break;
                    case core::socket::State::ERROR:
                        VLOG(1) << instanceName << " " << socketAddress.toString() << ": " << state.what();
                        break;
                    case core::socket::State::FATAL:
                        VLOG(1) << instanceName << " " << socketAddress.toString() << ": " << state.what();
                        break;
                }
            })
            .getFlowController();
 
        VLOG(1) << "Tls Routes:";
        for (std::string& route : legacyApp.getRoutes()) {
            route.erase(std::remove(route.begin(), route.end(), '$'), route.end());
 
            VLOG(1) << "  " << route;
        }
    }
 
    return express::WebApp::start();
}
 
/*
2021-05-14 10:21:39 0000000002:      accept-encoding: gzip, deflate, br
2021-05-14 10:21:39 0000000002:      accept-language: en-us,en;q=0.9,de-at;q=0.8,de-de;q=0.7,de;q=0.6
2021-05-14 10:21:39 0000000002:      cache-control: no-cache
2021-05-14 10:21:39 0000000002:      connection: upgrade, keep-alive
2021-05-14 10:21:39 0000000002:      host: localhost:8080
2021-05-14 10:21:39 0000000002:      origin: file://
2021-05-14 10:21:39 0000000002:      pragma: no-cache
2021-05-14 10:21:39 0000000002:      sec-websocket-extensions: permessage-deflate; client_max_window_bits
2021-05-14 10:21:39 0000000002:      sec-websocket-key: et6vtby1wwyooittpidflw==
2021-05-14 10:21:39 0000000002:      sec-websocket-version: 13
2021-05-14 10:21:39 0000000002:      upgrade: websocket
2021-05-14 10:21:39 0000000002:      user-agent: mozilla/5.0 (x11; linux x86_64) applewebkit/537.36 (khtml, like gecko)
chrome/90.0.4430.212 safari/537.36
*/