KNetwork::KStreamSocket

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

	~KStreamSocket () override

bool	bind (const KResolverEntry &entry) override

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

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

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

int	remainingTimeout () const

void	setTimeout (int msecs)

int	timeout () const

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

	~KClientSocketBase () override

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)

	~KActiveSocketBase () override

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)

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

QByteArray	read (qint64 len)

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

qint64	write (const QByteArray &data)

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

void	aboutToClose ()

virtual qint64	bytesToWrite () const const

void	bytesWritten (qint64 bytes)

virtual bool	canReadLine () const const

void	channelBytesWritten (int channel, qint64 bytes)

void	channelReadyRead (int channel)

void	commitTransaction ()

int	currentReadChannel () const const

int	currentWriteChannel () const const

QString	errorString () const const

bool	getChar (char *c)

bool	isOpen () const const

bool	isReadable () const const

bool	isTextModeEnabled () const const

bool	isTransactionStarted () const const

bool	isWritable () const const

virtual bool	open (QIODevice::OpenMode mode)

QIODevice::OpenMode	openMode () const 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 ()

int	readChannelCount () const const

void	readChannelFinished ()

qint64	readLine (char *data, qint64 maxSize)

QByteArray	readLine (qint64 maxSize)

void	readyRead ()

virtual bool	reset ()

void	rollbackTransaction ()

void	setCurrentReadChannel (int channel)

void	setCurrentWriteChannel (int channel)

void	setTextModeEnabled (bool enabled)

qint64	skip (qint64 maxSize)

void	startTransaction ()

void	ungetChar (char c)

virtual bool	waitForBytesWritten (int msecs)

virtual bool	waitForReadyRead (int msecs)

qint64	write (const char *data)

qint64	write (const char *data, qint64 maxSize)

qint64	write (const QByteArray &byteArray)

int	writeChannelCount () const const

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

bool	blockSignals (bool block)

const QObjectList &	children () const const

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

void	deleteLater ()

void	destroyed (QObject *obj)

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

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

void	dumpObjectInfo ()

void	dumpObjectInfo () const const

void	dumpObjectTree ()

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

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

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

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

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_DISABLE_COPY (Class)

	Q_DISABLE_COPY_MOVE (Class)

	Q_DISABLE_MOVE (Class)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qFindChild (const QObject *obj, const QString &name)

QList< T >	qFindChildren (const QObject *obj, const QRegExp &regExp)

QList< T >	qFindChildren (const QObject *obj, const QString &name)

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

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

bool	signalsBlocked () const const

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

int	startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)

QThread *	thread () const 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 QIODevice
enum	OpenModeFlag

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 context, Functor functor, 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)

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, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction 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
	Append

	ExistingOnly

	NewOnly

	NotOpen

typedef	OpenMode

	ReadOnly

	ReadWrite

	Text

	Truncate

	Unbuffered

	WriteOnly

Public Attributes inherited from QObject
typedef	QObjectList

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	readLineData (char *data, qint64 maxSize)

void	setErrorString (const QString &str)

void	setOpenMode (QIODevice::OpenMode openMode)

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 const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const 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::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::~KStreamSocket ( )

override

Destructor.

This closes the socket.

Definition at line 69 of file k3streamsocket.cpp.

Member Function Documentation

◆ bind() [1/2]

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.

◆ bind() [2/2]

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.

◆ connect() [1/2]

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.

◆ connect() [2/2]

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.

◆ remainingTimeout()

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.

◆ setTimeout()

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.

◆ timedOut

void KNetwork::KStreamSocket::timedOut ( )

signal

This signal is emitted when a connection timeout occurs.

◆ timeout()

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:

KNetwork::KStreamSocket::KStreamSocket

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

Default constructor.

Definition: k3streamsocket.cpp:55

QObject::connect

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

NetworkManager::hostname

NETWORKMANAGERQT_EXPORT QString hostname()

QString

KNetwork::KResolverEntry

One resolution entry.

Definition: k3resolver.h:72

QByteArray

KDE's Doxygen guidelines are available online.

Class Picker

Quick Links

About KDELibs4Support

KNetwork::KStreamSocket

Signals

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ KStreamSocket()

◆ ~KStreamSocket()

Member Function Documentation

◆ bind() [1/2]

◆ bind() [2/2]

◆ connect() [1/2]

◆ connect() [2/2]

◆ remainingTimeout()

◆ setTimeout()

◆ timedOut

◆ timeout()