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228 lines
7.7 KiB
228 lines
7.7 KiB
/* This file is part of the KDE project
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*
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* Copyright (C) 2004 Jakub Stachowski <qbast@go2.pl>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef DNSSDSERVICEBROWSER_H
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#define DNSSDSERVICEBROWSER_H
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#include <tqobject.h>
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#include <tqdict.h>
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#include <dnssd/remoteservice.h>
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class TQStringList;
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namespace DNSSD
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{
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class DomainBrowser;
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class ServiceBrowserPrivate;
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/**
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Most important class for applications that want to discover specific services on network.
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Suppose that you need list of web servers running. Example:
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\code
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DNSSD::ServiceBrowser* browser = new DNSSD::ServiceBrowser("_http._tcp");
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connect(browser,TQT_SIGNAL(serviceAdded(RemoteService::Ptr)),this,TQT_SLOT(addService(RemoteService::Ptr)));
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connect(browser,TQT_SIGNAL(serviceRemoved(RemoteService::Ptr)),this,TQT_SLOT(delService(RemoteService::Ptr)));
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browser->startBrowse();
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\endcode
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In above example addService will be called for every web server already running or just appearing
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on network and delService will be called when server is stopped. Because no DomainBrowser was passed
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to constructor, domains configured by user will be searched.
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@author Jakub Stachowski
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@short Browsing for specific type of services or all available service types
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*/
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class KDNSSD_EXPORT ServiceBrowser : public TQObject
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{
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Q_OBJECT
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public:
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/**
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@li AutoDelete - DomainBrowser object passes in constructor should be deleted when ServiceBrowser is deleted
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@li AutoResolve - after disovering new service it will be resolved and then
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reported with serviceAdded() signal. It raises network usage by resolving all services,
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so use it only when necessary.
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*/
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enum Flags {
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AutoDelete =1,
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AutoResolve = 2
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};
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/**
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Availability of DNS-SD services.
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@li Working - available
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@li Stopped - not available because mdnsd daemon is not running.
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@li Unsupported - not available because KDE was compiled without DNS-SD support
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*/
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enum State { Working, Stopped, Unsupported };
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/**
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ServiceBrowser constructor.
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@param types List of service types to browse for (example: "_http._tcp").
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Can also be DNSSD::ServicesBrowser::AllServices to specify "metaquery" for all service types
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present on network
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@param domains DomainBrowser object used to specify domains to browse. You do not have to connect
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its domainAdded() signal - it will be done automatically. You can left this parameter as NULL
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for default domains.
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@param flags One or more values from #Flags
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@since 3.5
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@todo KDE4: set default values for domains and flags
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*/
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ServiceBrowser(const TQStringList& types,DomainBrowser* domains,int flags);
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/**
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The same as above, but allows only one service type
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@param type Type of services to browse for
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@param domains DomainBrowser object used to specify domains to browse. You do not have to connect its domainAdded() signal - it will be done automatically. You can left this parameter as NULL for default domains.
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@param autoResolve auto resolve, if set
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@deprecated use previous constructor instead
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*/
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ServiceBrowser(const TQString& type,DomainBrowser* domains=0,bool autoResolve=false);
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/**
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Overloaded constructor used to create browser for one domain
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@param type Type of services to browse for
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@param domain Domain name. You can add more domains later using addDomain and remove them
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with removeDomain
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@param flags One or more values from #Flags. AutoDelete flag has no effect
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@since 3.5
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*/
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ServiceBrowser(const TQString& type,const TQString& domain, int flags);
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/**
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@deprecated user previous constructor instead
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*/
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ServiceBrowser(const TQString& type,const TQString& domain, bool autoResolve=false);
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~ServiceBrowser();
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/**
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Returns list of services
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*/
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const TQValueList<RemoteService::Ptr>& services() const;
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/**
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Starts browsing for services.
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To stop it just destroy the object.
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*/
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virtual void startBrowse();
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/**
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Return DomainBrowser containing domains being browsed. Valid object will returned
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even if 'domains' parameters in constructor was set to NULL or single domain
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constructor was used.
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*/
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const DomainBrowser* browsedDomains() const;
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/**
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Special service type to search for all available service types. Pass it as "type"
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parameter to ServiceBrowser constructor.
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*/
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static const TQString AllServices;
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/**
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Checks availability of DNS-SD services (this also covers publishing).
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If you use this function to report an error to the user, below is a suggestion
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on how to word the errors:
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\code
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switch(DNSSD::ServiceBrowser::isAvailable()) {
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case DNSSD::ServiceBrowser::Working:
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return "";
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case DNSSD::ServiceBrowser::Stopped:
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return i18n("<p>The Zeroconf daemon is not running. See the Service Discovery Handbook"
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" for more information.<br/>"
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"Other users will not see this system when browsing"
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" the network via zeroconf, but normal access will still work.</p>");
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case DNSSD::ServiceBrowser::Unsupported:
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return i18n("<p>Zeroconf support is not available in this version of TDE."
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" See the Service Discovery Handbook for more information.<br/>"
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"Other users will not see this system when browsing"
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" the network via zeroconf, but normal access will still work.</p>");
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default:
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return i18n("<p>Unknown error with Zeroconf.<br/>"
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"Other users will not see this system when browsing"
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" the network via zeroconf, but normal access will still work.</p>");
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}
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\endcode
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*/
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static const State isAvailable();
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signals:
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/**
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Emitted when new service is discovered (or resolved
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if autoresolve is set
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*/
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void serviceAdded(DNSSD::RemoteService::Ptr);
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/**
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Emitted when service is no longer announced. RemoteService object
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is deleted from services list and destroyed immediately after this
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signal returns.
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*/
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void serviceRemoved(DNSSD::RemoteService::Ptr);
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/**
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Emitted when all services has been reported. This signal can be used
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by application that just want to get list of currently available services
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(similar to directory listing) and do not care about dynamic adding/removing
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services later. This signal can be emitted many time: for example if new host
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has been connected to network and is announcing some services interesting to
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this ServiceBrowser, they will be reported by several serviceAdded() signals and
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whole batch will be concluded by finished().
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*/
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void finished();
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public slots:
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/**
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Remove one domain from list of domains to browse
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*/
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void removeDomain(const TQString& domain);
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/**
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Add new domain to browse
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*/
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void addDomain(const TQString& domain);
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protected:
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virtual void virtual_hook(int, void*);
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private:
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ServiceBrowserPrivate *d;
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bool allFinished();
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void init(const TQStringList&, DomainBrowser*, int);
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TQValueList<RemoteService::Ptr>::Iterator findDuplicate(RemoteService::Ptr src);
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private slots:
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void serviceResolved(bool success);
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void gotNewService(DNSSD::RemoteService::Ptr);
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void gotRemoveService(DNSSD::RemoteService::Ptr);
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void queryFinished();
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};
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}
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#endif
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