Simple HTTP Server
// Copyright (C) 2018 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include <QHttpServer> #include <QHttpServerResponse> #if QT_CONFIG(ssl) # include <QSslCertificate> # include <QSslKey> #endif #include <QCoreApplication> #include <QFile> #include <QJsonObject> #include <QString> using namespace Qt::StringLiterals; static inline QString host(const QHttpServerRequest &request) { return QString::fromLatin1(request.value("Host")); } int main(int argc, char *argv[]) { QCoreApplication app(argc, argv); QHttpServer httpServer; httpServer.route("/", []() { return "Hello world"; }); httpServer.route("/query", [] (const QHttpServerRequest &request) { return host(request) + u"/query/"_s; }); httpServer.route("/query/", [] (qint32 id, const QHttpServerRequest &request) { return u"%1/query/%2"_s.arg(host(request)).arg(id); }); httpServer.route("/query/<arg>/log", [] (qint32 id, const QHttpServerRequest &request) { return u"%1/query/%2/log"_s.arg(host(request)).arg(id); }); httpServer.route("/query/<arg>/log/", [] (qint32 id, float threshold, const QHttpServerRequest &request) { return u"%1/query/%2/log/%3"_s.arg(host(request)).arg(id).arg(threshold); }); httpServer.route("/user/", [] (const qint32 id) { return u"User "_s + QString::number(id); }); httpServer.route("/user/<arg>/detail", [] (const qint32 id) { return u"User %1 detail"_s.arg(id); }); httpServer.route("/user/<arg>/detail/", [] (const qint32 id, const qint32 year) { return u"User %1 detail year - %2"_s.arg(id).arg(year); }); httpServer.route("/json/", [] { return QJsonObject{ { {"key1", "1"}, {"key2", "2"}, {"key3", "3"} } }; }); httpServer.route("/assets/<arg>", [] (const QUrl &url) { return QHttpServerResponse::fromFile(u":/assets/"_s + url.path()); }); httpServer.route("/remote_address", [](const QHttpServerRequest &request) { return request.remoteAddress().toString(); }); // Basic authentication example (RFC 7617) httpServer.route("/auth", [](const QHttpServerRequest &request) { auto auth = request.value("authorization").simplified(); if (auth.size() > 6 && auth.first(6).toLower() == "basic ") { auto token = auth.sliced(6); auto userPass = QByteArray::fromBase64(token); if (auto colon = userPass.indexOf(':'); colon > 0) { auto userId = userPass.first(colon); auto password = userPass.sliced(colon + 1); if (userId == "Aladdin" && password == "open sesame") return QHttpServerResponse("text/plain", "Success\n"); } } QHttpServerResponse response("text/plain", "Authentication required\n", QHttpServerResponse::StatusCode::Unauthorized); response.setHeader("WWW-Authenticate", R"(Basic realm="Simple example", charset="UTF-8")"); return response; }); httpServer.afterRequest([](QHttpServerResponse &&resp) { resp.setHeader("Server", "Qt HTTP Server"); return std::move(resp); }); const auto port = httpServer.listen(QHostAddress::Any); if (!port) { qWarning() << QCoreApplication::translate("QHttpServerExample", "Server failed to listen on a port."); return -1; } #if QT_CONFIG(ssl) const auto sslCertificateChain = QSslCertificate::fromPath(QStringLiteral(":/assets/certificate.crt")); if (sslCertificateChain.empty()) { qWarning() << QCoreApplication::translate("QHttpServerExample", "Couldn't retrieve SSL certificate from file."); return -1; } QFile privateKeyFile(QStringLiteral(":/assets/private.key")); if (!privateKeyFile.open(QIODevice::ReadOnly)) { qWarning() << QCoreApplication::translate("QHttpServerExample", "Couldn't open file for reading: %1") .arg(privateKeyFile.errorString()); return -1; } httpServer.sslSetup(sslCertificateChain.front(), QSslKey(&privateKeyFile, QSsl::Rsa)); privateKeyFile.close(); const auto sslPort = httpServer.listen(QHostAddress::Any); if (!sslPort) { qWarning() << QCoreApplication::translate("QHttpServerExample", "Server failed to listen on a port."); return -1; } qInfo().noquote() << QCoreApplication::translate("QHttpServerExample", "Running on http://127.0.0.1:%1/ and " "https://127.0.0.1:%2/ (Press CTRL+C to quit)") .arg(port).arg(sslPort); #else qInfo().noquote() << QCoreApplication::translate("QHttpServerExample", "Running on http://127.0.0.1:%1/" "(Press CTRL+C to quit)").arg(port); #endif return app.exec(); }