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68b0f52359
* qt/examples: Add QtDBus example programs: - hello: Hello, World - ping: Simple method-calling program - pong: Simple object-exporting program (not using adaptors) - complexping: Interactive method-calling program (also gets and sets properties). - complexpong: Sample program exporting methods, signals and properties, using adaptors. - dbus: Simple implementation of a generic method-calling program, similar to 'dbus-send', but with semantics similar to 'dcop'. - chat: Simplistic chat program, implemented using signals and the system bus. Looks like IRC.
318 lines
9.7 KiB
C++
318 lines
9.7 KiB
C++
/* -*- C++ -*-
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*
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* Copyright (C) 2006 Trolltech AS. All rights reserved.
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* Author: Thiago Macieira <thiago.macieira@trolltech.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <stdio.h>
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#include <dbus/qdbus.h>
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#include <QtCore/QCoreApplication>
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#include <QtCore/QStringList>
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#include <QtCore/qmetaobject.h>
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#include <QtXml/QDomDocument>
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#include <QtXml/QDomElement>
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Q_DECLARE_METATYPE(QVariant)
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QDBusConnection *connection;
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void listObjects(const QString &service, const QString &path)
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{
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QDBusInterface *iface = connection->findInterface(service, path.isEmpty() ? "/" : path,
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"org.freedesktop.DBus.Introspectable");
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QDBusReply<QString> xml = iface->call("Introspect");
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if (xml.isError())
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return; // silently
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QDomDocument doc;
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doc.setContent(xml);
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QDomElement node = doc.documentElement();
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QDomElement child = node.firstChildElement();
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while (!child.isNull()) {
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if (child.tagName() == QLatin1String("node")) {
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QString sub = path + '/' + child.attribute("name");
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printf("%s\n", qPrintable(sub));
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listObjects(service, sub);
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}
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child = child.nextSiblingElement();
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}
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delete iface;
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}
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void listInterface(const QString &service, const QString &path, const QString &interface)
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{
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QDBusInterface *iface = connection->findInterface(service, path, interface);
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const QMetaObject *mo = iface->metaObject();
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// properties
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for (int i = mo->propertyOffset(); i < mo->propertyCount(); ++i) {
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QMetaProperty mp = mo->property(i);
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printf("property ");
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if (mp.isReadable() && mp.isWritable())
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printf("readwrite");
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else if (mp.isReadable())
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printf("read");
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else
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printf("write");
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printf(" %s %s.%s\n", mp.typeName(), qPrintable(interface), mp.name());
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}
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// methods (signals and slots)
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for (int i = mo->methodOffset(); i < mo->methodCount(); ++i) {
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QMetaMethod mm = mo->method(i);
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QByteArray signature = mm.signature();
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signature.truncate(signature.indexOf('('));
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printf("%s %s%s%s %s.%s(",
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mm.methodType() == QMetaMethod::Signal ? "signal" : "method",
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mm.tag(), *mm.tag() ? " " : "",
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*mm.typeName() ? mm.typeName() : "void",
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qPrintable(interface), signature.constData());
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QList<QByteArray> types = mm.parameterTypes();
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QList<QByteArray> names = mm.parameterNames();
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bool first = true;
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for (int i = 0; i < types.count(); ++i) {
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printf("%s%s",
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first ? "" : ", ",
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types.at(i).constData());
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if (!names.at(i).isEmpty())
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printf(" %s", names.at(i).constData());
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first = false;
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}
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printf(")\n");
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}
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delete iface;
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}
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void listAllInterfaces(const QString &service, const QString &path)
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{
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QDBusInterface *iface = connection->findInterface(service, path,
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"org.freedesktop.DBus.Introspectable");
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QDBusReply<QString> xml = iface->call("Introspect");
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if (xml.isError())
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return; // silently
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QDomDocument doc;
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doc.setContent(xml);
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QDomElement node = doc.documentElement();
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QDomElement child = node.firstChildElement();
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while (!child.isNull()) {
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if (child.tagName() == QLatin1String("interface")) {
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listInterface(service, path, child.attribute("name"));
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}
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child = child.nextSiblingElement();
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}
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delete iface;
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}
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QDBusInterface *findMember(const QString &service, const QString &path, const QString &member)
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{
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QDBusInterface *iface = connection->findInterface(service, path,
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"org.freedesktop.DBus.Introspectable");
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QDBusReply<QString> xml = iface->call("Introspect");
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if (xml.isError())
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return 0;
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QDomDocument doc;
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doc.setContent(xml);
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QDomElement node = doc.documentElement();
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QDomElement child = node.firstChildElement("interface");
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while (!child.isNull()) {
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QDomElement subchild = child.firstChildElement("method");
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while (!subchild.isNull()) {
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if (subchild.attribute("name") == member) {
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QDBusInterface *retval;
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retval = connection->findInterface(service, path, child.attribute("name"));
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delete iface;
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return retval;
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}
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subchild = subchild.nextSiblingElement("method");
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}
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child = child.nextSiblingElement("interface");
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}
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delete iface;
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return 0;
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}
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QStringList readList(int &argc, const char *const *&argv)
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{
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--argc;
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++argv;
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QStringList retval;
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while (argc && QLatin1String(argv[0]) != ")")
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retval += QString::fromLocal8Bit(argv[0]);
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return retval;
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}
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void placeCall(const QString &service, const QString &path, const QString &interface,
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const QString &member, int argc, const char *const *argv)
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{
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QDBusInterface *iface;
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if (interface.isEmpty())
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iface = findMember(service, path, member);
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else
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iface = connection->findInterface(service, path, interface);
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if (!iface) {
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fprintf(stderr, "Interface '%s' not available in object %s at %s\n",
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qPrintable(interface), qPrintable(path), qPrintable(service));
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exit(1);
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}
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const QMetaObject *mo = iface->metaObject();
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QByteArray match = member.toLatin1();
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match += '(';
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int midx;
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for (int i = mo->methodOffset(); i < mo->methodCount(); ++i) {
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QMetaMethod mm = mo->method(i);
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QByteArray signature = mm.signature();
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if (signature.startsWith(match)) {
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midx = i;
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break;
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}
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}
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if (midx == -1) {
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fprintf(stderr, "Cannot find '%s.%s' in object %s at %s\n",
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qPrintable(interface), qPrintable(member), qPrintable(path),
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qPrintable(service));
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exit(1);
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}
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QMetaMethod mm = iface->metaObject()->method(midx);
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QList<QByteArray> types = mm.parameterTypes();
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QVariantList params;
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for (int i = 0; argc && i < types.count(); ++i) {
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int id = QVariant::nameToType(types.at(i));
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if (id == QVariant::UserType || id == QVariant::Map) {
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fprintf(stderr, "Sorry, can't pass arg of type %s yet\n",
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types.at(i).constData());
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exit(1);
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}
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Q_ASSERT(id);
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QVariant p;
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if ((id == QVariant::List || id == QVariant::StringList) && QLatin1String("(") == argv[0])
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p = readList(argc, argv);
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else
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p = QString::fromLocal8Bit(argv[0]);
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p.convert( QVariant::Type(id) );
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params += p;
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--argc;
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++argv;
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}
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if (params.count() != types.count()) {
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fprintf(stderr, "Invalid number of parameters\n");
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exit(1);
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}
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QDBusMessage reply = iface->callWithArgs(member, params);
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if (reply.type() == QDBusMessage::ErrorMessage) {
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QDBusError err = reply;
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printf("Error: %s\n%s\n", qPrintable(err.name()), qPrintable(err.message()));
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exit(2);
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} else if (reply.type() != QDBusMessage::ReplyMessage) {
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fprintf(stderr, "Invalid reply type %d\n", int(reply.type()));
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exit(1);
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}
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foreach (QVariant v, reply) {
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if (v.userType() == qMetaTypeId<QVariant>())
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v = qvariant_cast<QVariant>(v);
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printf("%s\n", qPrintable(v.toString()));
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}
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delete iface;
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exit(0);
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}
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int main(int argc, char **argv)
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{
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QCoreApplication app(argc, argv);
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if (argc >= 1 && qstrcmp(argv[1], "--system") == 0) {
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connection = &QDBus::systemBus();
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--argc;
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++argv;
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} else
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connection = &QDBus::sessionBus();
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QDBusBusService *bus = connection->busService();
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if (argc == 1) {
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QStringList names = bus->ListNames();
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foreach (QString name, names)
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printf("%s\n", qPrintable(name));
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exit(0);
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}
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QString service = QLatin1String(argv[1]);
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if (!QDBusUtil::isValidBusName(service)) {
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fprintf(stderr, "Service '%s' is not a valid name.\n", qPrintable(service));
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exit(1);
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}
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if (!bus->NameHasOwner(service)) {
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fprintf(stderr, "Service '%s' does not exist.\n", qPrintable(service));
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exit(1);
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}
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if (argc == 2) {
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printf("/\n");
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listObjects(service, QString());
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exit(0);
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}
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QString path = QLatin1String(argv[2]);
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if (!QDBusUtil::isValidObjectPath(path)) {
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fprintf(stderr, "Path '%s' is not a valid path name.\n", qPrintable(path));
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exit(1);
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}
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if (argc == 3) {
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listAllInterfaces(service, path);
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exit(0);
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}
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QString interface = QLatin1String(argv[3]);
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QString member;
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int pos = interface.lastIndexOf(QLatin1Char('.'));
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if (pos == -1) {
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member = interface;
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interface.clear();
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} else {
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member = interface.mid(pos + 1);
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interface.truncate(pos);
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}
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placeCall(service, path, interface, member, argc - 4, argv + 4);
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}
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