// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 #include #include #include #include #include #include #include #include #include #include #include using namespace std::chrono_literals; const int bufsize = 16*1024; char buf[bufsize]; int main(int argc, char**argv) { QCoreApplication app(argc, argv); // create it QAbstractSocketEngine *socketEngine = QAbstractSocketEngine::createSocketEngine(QAbstractSocket::TcpSocket, QNetworkProxy(QNetworkProxy::NoProxy), 0); if (!socketEngine) { qDebug() << "could not create engine"; exit(1); } // initialize it bool initialized = socketEngine->initialize(QAbstractSocket::TcpSocket, QAbstractSocket::IPv4Protocol); if (!initialized) { qDebug() << "not able to initialize engine"; exit(1); } // wait for connected int r = socketEngine->connectToHost(QHostAddress("74.125.77.99"), 80); // google bool readyToRead = false; bool readyToWrite = false; socketEngine->waitForReadOrWrite(&readyToRead, &readyToWrite, true, true, 10s); if (r <= 0) //timeout or error exit(1); if (readyToWrite) { // write the request QByteArray request("GET /robots.txt HTTP/1.0\r\n\r\n"); int ret = socketEngine->write(request.constData(), request.length()); if (ret == request.length()) { // read the response in a loop do { bool waitReadResult = socketEngine->waitForRead(10s); int available = socketEngine->bytesAvailable(); if (waitReadResult == true && available == 0) { // disconnected exit(0); } std::fill(buf, buf + bufsize, 0); ret = socketEngine->read(buf, available); if (ret > 0) { printf("%s", buf); } else { // some failure when reading exit(1); } } while (1); } else { qDebug() << "failed writing"; } } else { qDebug() << "failed connecting"; } delete socketEngine; }