KNetwork::KStreamSocket Class Reference

#include <k3streamsocket.h>

Inheritance diagram for KNetwork::KStreamSocket:

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 QString &node=QString(), const QString &service=QString()) override
bool	bind (const KResolverEntry &entry) override
bool	connect (const QString &node=QString(), const QString &service=QString(), OpenMode mode=ReadWrite) override
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)
	~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)
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 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 ()
QByteArray	readLine (qint64 maxSize)
qint64	readLine (char *data, 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 QByteArray &byteArray)
qint64	write (const char *data, qint64 maxSize)
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 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
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 (QObject *object)
T	qobject_cast (const 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 *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
	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 ( 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 ( )

override

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:

• k3streamsocket.h
• k3streamsocket.cpp