/vp_plugins/qtservice-2.6_1-opensource/examples/server/main.cpp

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 46
 47#include <QtCore/QCoreApplication>
 48#include <QtNetwork/QTcpServer>
 49#include <QtNetwork/QTcpSocket>
 50#include <QtCore/QTextStream>
 51#include <QtCore/QDateTime>
 52#include <QtCore/QStringList>
 53#include <QtCore/QDir>
 54#include <QtCore/QSettings>
 55
 56#include "qtservice.h"
 57
 58// HttpDaemon is the the class that implements the simple HTTP server.
 59class HttpDaemon : public QTcpServer
 60{
 61    Q_OBJECT
 62public:
 63    HttpDaemon(quint16 port, QObject* parent = 0)
 64        : QTcpServer(parent), disabled(false)
 65    {
 66        listen(QHostAddress::Any, port);
 67    }
 68
 69    void incomingConnection(int socket)
 70    {
 71        if (disabled)
 72            return;
 73
 74        // When a new client connects, the server constructs a QTcpSocket and all
 75        // communication with the client is done over this QTcpSocket. QTcpSocket
 76        // works asynchronously, this means that all the communication is done
 77        // in the two slots readClient() and discardClient().
 78        QTcpSocket* s = new QTcpSocket(this);
 79        connect(s, SIGNAL(readyRead()), this, SLOT(readClient()));
 80        connect(s, SIGNAL(disconnected()), this, SLOT(discardClient()));
 81        s->setSocketDescriptor(socket);
 82
 83        QtServiceBase::instance()->logMessage("New Connection");
 84    }
 85
 86    void pause()
 87    {
 88        disabled = true;
 89    }
 90
 91    void resume()
 92    {
 93        disabled = false;
 94    }
 95
 96private slots:
 97    void readClient()
 98    {
 99        if (disabled)
100            return;
101
102        // This slot is called when the client sent data to the server. The
103        // server looks if it was a get request and sends a very simple HTML
104        // document back.
105        QTcpSocket* socket = (QTcpSocket*)sender();
106        if (socket->canReadLine()) {
107            QStringList tokens = QString(socket->readLine()).split(QRegExp("[ \r\n][ \r\n]*"));
108            if (tokens[0] == "GET") {
109                QTextStream os(socket);
110                os.setAutoDetectUnicode(true);
111                os << "HTTP/1.0 200 Ok\r\n"
112                    "Content-Type: text/html; charset=\"utf-8\"\r\n"
113                    "\r\n"
114                    "<h1>Nothing to see here</h1>\n"
115                    << QDateTime::currentDateTime().toString() << "\n";
116                socket->close();
117
118                QtServiceBase::instance()->logMessage("Wrote to client");
119
120                if (socket->state() == QTcpSocket::UnconnectedState) {
121                    delete socket;
122                    QtServiceBase::instance()->logMessage("Connection closed");
123                }
124            }
125        }
126    }
127    void discardClient()
128    {
129        QTcpSocket* socket = (QTcpSocket*)sender();
130        socket->deleteLater();
131
132        QtServiceBase::instance()->logMessage("Connection closed");
133    }
134
135private:
136    bool disabled;
137};
138
139class HttpService : public QtService<QCoreApplication>
140{
141public:
142    HttpService(int argc, char **argv)
143	: QtService<QCoreApplication>(argc, argv, "Qt HTTP Daemon")
144    {
145        setServiceDescription("A dummy HTTP service implemented with Qt");
146        setServiceFlags(QtServiceBase::CanBeSuspended);
147    }
148
149protected:
150    void start()
151    {
152        QCoreApplication *app = application();
153
154        quint16 port = (app->argc() > 1) ?
155                QString::fromLocal8Bit(app->argv()[1]).toUShort() : 8080;
156        daemon = new HttpDaemon(port, app);
157
158        if (!daemon->isListening()) {
159            logMessage(QString("Failed to bind to port %1").arg(daemon->serverPort()), QtServiceBase::Error);
160            app->quit();
161        }
162    }
163
164    void pause()
165    {
166	daemon->pause();
167    }
168
169    void resume()
170    {
171	daemon->resume();
172    }
173
174private:
175    HttpDaemon *daemon;
176};
177
178#include "main.moc"
179
180int main(int argc, char **argv)
181{
182#if !defined(Q_WS_WIN)
183    // QtService stores service settings in SystemScope, which normally require root privileges.
184    // To allow testing this example as non-root, we change the directory of the SystemScope settings file.
185    QSettings::setPath(QSettings::NativeFormat, QSettings::SystemScope, QDir::tempPath());
186    qWarning("(Example uses dummy settings file: %s/QtSoftware.conf)", QDir::tempPath().toLatin1().constData());
187#endif
188    HttpService service(argc, argv);
189    return service.exec();
190}