KDELibs4Support - KNetwork::KStreamSocket Class Reference

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#include <k3streamsocket.h>

Inheritance diagram for KNetwork::KStreamSocket:

[legend]

Signals
void	timedOut ()

Signals inherited from KNetwork::KClientSocketBase
void	aboutToConnect (const KNetwork::KResolverEntry &remote, bool &skip)

void	bound (const KNetwork::KResolverEntry &local)

void	closed ()

void	connected (const KNetwork::KResolverEntry &remote)

void	gotError (int code)

void	hostFound ()

void	readyWrite ()

void	stateChanged (int newstate)

Public Member Functions
KDELIBS4SUPPORT_DEPRECATED	KStreamSocket (const QString &node=QString(), const QString &service=QString(), QObject *parent=nullptr)

virtual	~KStreamSocket ()

virtual bool	bind (const QString &node=QString(), const QString &service=QString()) override

bool	bind (const KResolverEntry &entry) override

virtual bool	connect (const QString &node=QString(), const QString &service=QString(), OpenMode mode=ReadWrite) override

virtual bool	connect (const KResolverEntry &entry, OpenMode mode=ReadWrite) override

int	remainingTimeout () const

void	setTimeout (int msecs)

int	timeout () const

Public Member Functions inherited from KNetwork::KClientSocketBase
	KClientSocketBase (QObject *parent)

virtual	~KClientSocketBase ()

qint64	bytesAvailable () const override

void	close () override

bool	disconnect () override

bool	emitsReadyRead () const

bool	emitsReadyWrite () const

virtual void	enableRead (bool enable)

virtual void	enableWrite (bool enable)

virtual bool	flush ()

KSocketAddress	localAddress () const override

KResolver &	localResolver () const

const KResolverResults &	localResults () const

virtual bool	lookup ()

bool	open (OpenMode mode) override

KSocketAddress	peerAddress () const override

KResolver &	peerResolver () const

const KResolverResults &	peerResults () const

void	setFamily (int families)

void	setResolutionEnabled (bool enable)

SocketState	state () const

qint64	waitForMore (int msecs, bool *timeout=nullptr) override

Public Member Functions inherited from KNetwork::KActiveSocketBase
	KActiveSocketBase (QObject *parent)

virtual	~KActiveSocketBase ()

bool	atEnd () const override

QString	errorString () const

bool	isSequential () const override

bool	open (OpenMode mode) override

qint64	peek (char *data, qint64 maxlen)

qint64	peek (char *data, qint64 maxlen, KSocketAddress &from)

qint64	pos () const override

qint64	read (char *data, qint64 maxlen)

QByteArray	read (qint64 len)

qint64	read (char *data, qint64 maxlen, KSocketAddress &from)

bool	seek (qint64) override

void	setSocketDevice (KSocketDevice *device) override

qint64	size () const override

void	ungetChar (char)

qint64	write (const char *data, qint64 len)

qint64	write (const QByteArray &data)

qint64	write (const char *data, qint64 len, const KSocketAddress &to)

Public Member Functions inherited from QIODevice
	QIODevice (QObject *parent)

void	aboutToClose ()

virtual qint64	bytesToWrite () const

void	bytesWritten (qint64 bytes)

virtual bool	canReadLine () const

QString	errorString () const

bool	getChar (char *c)

bool	isOpen () const

bool	isReadable () const

bool	isTextModeEnabled () const

bool	isWritable () const

virtual bool	open (QFlags< QIODevice::OpenModeFlag > mode)

OpenMode	openMode () const

qint64	peek (char *data, qint64 maxSize)

QByteArray	peek (qint64 maxSize)

bool	putChar (char c)

qint64	read (char *data, qint64 maxSize)

QByteArray	read (qint64 maxSize)

QByteArray	readAll ()

void	readChannelFinished ()

qint64	readLine (char *data, qint64 maxSize)

QByteArray	readLine (qint64 maxSize)

void	readyRead ()

virtual bool	reset ()

void	setTextModeEnabled (bool enabled)

void	ungetChar (char c)

virtual bool	waitForBytesWritten (int msecs)

virtual bool	waitForReadyRead (int msecs)

qint64	write (const char *data, qint64 maxSize)

qint64	write (const QByteArray &byteArray)

qint64	write (const char *data)

Public Member Functions inherited from QObject
	QObject (QObject *parent)

bool	blockSignals (bool block)

const QObjectList &	children () const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const

bool	disconnect (const QObject receiver, const char method) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QByteArray >	dynamicPropertyNames () const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, QFlags< Qt::FindChildOption > options) const

QList< T >	findChildren (const QString &name, QFlags< Qt::FindChildOption > options) const

QList< T >	findChildren (const QRegExp &regExp, QFlags< Qt::FindChildOption > options) const

QList< T >	findChildren (const QRegularExpression &re, QFlags< Qt::FindChildOption > options) const

bool	inherits (const char *className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const

QVariant	property (const char *name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType)

QThread *	thread () const

Public Member Functions inherited from KNetwork::KSocketBase
	KSocketBase ()

virtual	~KSocketBase ()

bool	addressReuseable () const

bool	blocking () const

bool	broadcast () const

SocketError	error () const

QString	errorString () const

bool	isIPv6Only () const

QMutex *	mutex () const

bool	noDelay () const

virtual bool	setAddressReuseable (bool enable)

virtual bool	setBlocking (bool enable)

virtual bool	setBroadcast (bool enable)

virtual bool	setIPv6Only (bool enable)

virtual bool	setNoDelay (bool enable)

int	setRequestedCapabilities (int add, int remove=0)

KSocketDevice *	socketDevice () const

Additional Inherited Members
Public Types inherited from KNetwork::KClientSocketBase
enum	SocketState { Idle, HostLookup, HostFound, Bound, Connecting, Open, Closing, Unconnected = Bound, Connected = Open, Connection = Open }

Public Types inherited from KNetwork::KSocketBase
enum	SocketError { NoError = 0, LookupFailure, AddressInUse, AlreadyCreated, AlreadyBound, AlreadyConnected, NotConnected, NotBound, NotCreated, WouldBlock, ConnectionRefused, ConnectionTimedOut, InProgress, NetFailure, NotSupported, Timeout, UnknownError, RemotelyDisconnected }

enum	SocketOptions { Blocking = 0x01, AddressReuseable = 0x02, IPv6Only = 0x04, Keepalive = 0x08, Broadcast = 0x10, NoDelay = 0x20 }

Properties inherited from QObject
	objectName

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

QString	tr (const char sourceText, const char disambiguation, int n)

QString	trUtf8 (const char sourceText, const char disambiguation, int n)

Static Public Member Functions inherited from KNetwork::KSocketBase
static QString	errorString (SocketError code)

static bool	isFatalError (int code)

Public Attributes inherited from QIODevice
typedef	OpenMode

Protected Slots inherited from KNetwork::KClientSocketBase
virtual void	slotReadActivity ()

virtual void	slotWriteActivity ()

Protected Member Functions inherited from KNetwork::KClientSocketBase
void	copyError ()

qint64	peekData (char data, qint64 maxlen, KSocketAddress from) override

qint64	readData (char data, qint64 maxlen, KSocketAddress from) override

bool	setSocketOptions (int opts) override

void	setState (SocketState state)

virtual void	stateChanging (SocketState newState)

qint64	writeData (const char data, qint64 len, const KSocketAddress to) override

Protected Member Functions inherited from KNetwork::KActiveSocketBase
qint64	readData (char *data, qint64 len) override

void	resetError ()

void	setError (SocketError error)

qint64	writeData (const char *data, qint64 len) override

Protected Member Functions inherited from QIODevice
virtual qint64	readData (char *data, qint64 maxSize)=0

virtual qint64	readLineData (char *data, qint64 maxSize)

void	setErrorString (const QString &str)

void	setOpenMode (QFlags< QIODevice::OpenModeFlag > openMode)

virtual qint64	writeData (const char *data, qint64 maxSize)=0

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const

int	receivers (const char *signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Protected Member Functions inherited from KNetwork::KSocketBase
bool	hasDevice () const

void	resetError ()

void	setError (SocketError error)

virtual int	socketOptions () const

Detailed Description

Simple stream socket.

This class provides functionality to creating unbuffered, stream sockets. In the case of Internet (IP) sockets, this class creates and uses TCP/IP sockets.

Objects of this class start, by default, on non-blocking mode. Call setBlocking if you wish to change that.

KStreamSocket objects are thread-safe and can be used in auxiliary threads (i.e., not the thread in which the Qt event loop runs in). Note that KBufferedSocket cannot be used reliably in an auxiliary thread.

Sample usage:

QByteArray httpGet(const QString& hostname)
{
  KStreamSocket socket(hostname, "http");
  if (!socket.connect())
    return QByteArray();
  QByteArray data = socket.readAll();
  return data;
}

Here's another sample, showing asynchronous operation:

DataRetriever::DataRetriever(const QString& hostname, const QString& port)
  : socket(hostname, port)
{
  // connect signals to our slots
  QObject::connect(&socket, SIGNAL(connected(const KNetwork::KResolverEntry&)),
                   this, SLOT(slotSocketConnected()));
  QObject::connect(&socket, SIGNAL(gotError(int)),
                   this, SLOT(slotSocketError(int)));
  QObject::connect(&socket, SIGNAL(readyRead()),
                   this, SLOT(slotSocketReadyToRead()));
  QObject::connect(&socket, SIGNAL(readyWrite()),
                   this, SLOT(slotSocketReadyToWrite()));
  // set non-blocking mode in order to work asynchronously
  socket.setBlocking(false);
  // turn on signal emission
  socket.enableRead(true);
  socket.enableWrite(true);
  // start connecting
  socket.connect();
}

See also: KNetwork::KBufferedSocket, KNetwork::KServerSocket

Author: Thiago Macieira thiag[email protected][email protected][email protected]e.org

Version: 0.9

Deprecated:: Use KSocketFactory or KLocalSocket instead

Definition at line 99 of file k3streamsocket.h.

Constructor & Destructor Documentation

KStreamSocket::KStreamSocket	(	const QString &	node = `QString()`,
		const QString &	service = `QString()`,
		QObject *	parent = `nullptr`
	)

explicit

Default constructor.

Parameters

node	destination host
service	destination service to connect to
parent	the parent QObject object

Definition at line 55 of file k3streamsocket.cpp.

KStreamSocket::~KStreamSocket ( )

virtual

Destructor.

This closes the socket.

Definition at line 69 of file k3streamsocket.cpp.

Member Function Documentation

bool KStreamSocket::bind	(	const QString &	node = `QString()`,
		const QString &	service = `QString()`
	)

overridevirtual

Binds this socket to the given nodename and service, or use the default ones if none are given.

In order to bind to a service and allow the operating system to choose the interface, set node to QString().

Reimplemented from KClientSocketBase.

Upon successful binding, the bound() signal will be emitted. If an error is found, the gotError() signal will be emitted.

Note: Due to the internals of the name lookup and binding mechanism, some (if not most) implementations of this function do not actually bind the socket until the connection is requested (see connect()). They only set the values for future reference.

This function returns true on success.

Parameters

node	the nodename
service	the service

Implements KNetwork::KClientSocketBase.

Definition at line 101 of file k3streamsocket.cpp.

bool KStreamSocket::bind ( const KResolverEntry & entry )

overridevirtual

Reimplemented from KClientSocketBase.

Connect this socket to this specific address.

Unlike bind(const QString&, const QString&) above, this function really does bind the socket. No lookup is performed. The bound() signal will be emitted.

Reimplemented from KNetwork::KClientSocketBase.

Definition at line 116 of file k3streamsocket.cpp.

bool KStreamSocket::connect	(	const QString &	node = `QString()`,
		const QString &	service = `QString()`,
		OpenMode	mode = `ReadWrite`
	)

overridevirtual

Reimplemented from KClientSocketBase.

Attempts to connect to the these hostname and service, or use the default ones if none are given. If a connection attempt is already in progress, check on its state and set the error status (NoError, meaning the connection is completed, or InProgress).

If the blocking mode for this object is on, this function will only return when all the resolved peer addresses have been tried or when a connection is established.

Upon successfully connecting, the connected() signal will be emitted. If an error is found, the gotError() signal will be emitted.

This function also implements timeout handling.

Parameters

node	the remote node to connect to
service	the service on the remote node to connect to
mode	mode to operate this socket in

Implements KNetwork::KClientSocketBase.

Definition at line 121 of file k3streamsocket.cpp.

bool KStreamSocket::connect	(	const KResolverEntry &	entry,
		OpenMode	mode = `ReadWrite`
	)

overridevirtual

Unshadowing from KClientSocketBase.

Reimplemented from KNetwork::KClientSocketBase.

Definition at line 206 of file k3streamsocket.cpp.

int KStreamSocket::remainingTimeout ( ) const

Retrieves the remaining timeout time (in milliseconds).

This value equals timeout() if there's no connection in progress.

Definition at line 80 of file k3streamsocket.cpp.

void KStreamSocket::setTimeout ( int msecs )

Sets the timeout value.

Setting this value while a connection attempt is in progress will reset the timer.

Please note that the timeout value is valid for the connection attempt only. No other operations are timed against this value – including the name lookup associated.

Parameters

msecs the timeout value in milliseconds

Definition at line 92 of file k3streamsocket.cpp.

void KNetwork::KStreamSocket::timedOut ( )

signal

This signal is emitted when a connection timeout occurs.

int KStreamSocket::timeout ( ) const

Retrieves the timeout value (in milliseconds).

Definition at line 75 of file k3streamsocket.cpp.

The documentation for this class was generated from the following files:

KDE's Doxygen guidelines are available online.

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KNetwork::KStreamSocket

Signals

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation