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=0L)
virtual	~KStreamSocket ()
virtual bool	bind (const QString &node=QString(), const QString &service=QString())
virtual bool	bind (const KResolverEntry &entry)
virtual bool	connect (const QString &node=QString(), const QString &service=QString(), OpenMode mode=ReadWrite)
virtual bool	connect (const KResolverEntry &entry, OpenMode mode=ReadWrite)
int	remainingTimeout () const
void	setTimeout (int msecs)
int	timeout () const
Public Member Functions inherited from KNetwork::KClientSocketBase
	KClientSocketBase (QObject *parent)
virtual	~KClientSocketBase ()
virtual qint64	bytesAvailable () const
virtual void	close ()
virtual bool	disconnect ()
bool	emitsReadyRead () const
bool	emitsReadyWrite () const
virtual void	enableRead (bool enable)
virtual void	enableWrite (bool enable)
virtual bool	flush ()
virtual KSocketAddress	localAddress () const
KResolver &	localResolver () const
const KResolverResults &	localResults () const
virtual bool	lookup ()
virtual bool	open (OpenMode mode)
virtual KSocketAddress	peerAddress () const
KResolver &	peerResolver () const
const KResolverResults &	peerResults () const
void	setFamily (int families)
void	setResolutionEnabled (bool enable)
SocketState	state () const
virtual qint64	waitForMore (int msecs, bool *timeout=0L)
Public Member Functions inherited from KNetwork::KActiveSocketBase
	KActiveSocketBase (QObject *parent)
virtual	~KActiveSocketBase ()
virtual bool	atEnd () const
QString	errorString () const
virtual bool	isSequential () const
qint64	peek (char *data, qint64 maxlen)
qint64	peek (char *data, qint64 maxlen, KSocketAddress &from)
virtual qint64	pos () const
qint64	read (char *data, qint64 maxlen)
QByteArray	read (qint64 len)
qint64	read (char *data, qint64 maxlen, KSocketAddress &from)
virtual bool	seek (qint64)
virtual void	setSocketDevice (KSocketDevice *device)
virtual qint64	size () const
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 ()
	QIODevice (QObject *parent)
virtual	~QIODevice ()
void	aboutToClose ()
Offset	at () const
bool	at (Offset offset)
virtual qint64	bytesToWrite () const
void	bytesWritten (qint64 bytes)
virtual bool	canReadLine () const
QString	errorString () const
int	flags () const
int	getch ()
bool	getChar (char *c)
bool	isAsynchronous () const
bool	isBuffered () const
bool	isCombinedAccess () const
bool	isDirectAccess () const
bool	isInactive () const
bool	isOpen () const
bool	isRaw () const
bool	isReadable () const
bool	isSequentialAccess () const
bool	isSynchronous () const
bool	isTextModeEnabled () const
bool	isTranslated () const
bool	isWritable () const
int	mode () const
virtual bool	open (QFlags< QIODevice::OpenModeFlag > mode)
OpenMode	openMode () const
qint64	peek (char *data, qint64 maxSize)
QByteArray	peek (qint64 maxSize)
int	putch (int ch)
bool	putChar (char c)
qint64	read (char *data, qint64 maxSize)
QByteArray	read (qint64 maxSize)
QByteArray	readAll ()
qint64	readBlock (char *data, quint64 size)
void	readChannelFinished ()
QByteArray	readLine (qint64 maxSize)
qint64	readLine (char *data, qint64 maxSize)
void	readyRead ()
virtual bool	reset ()
void	resetStatus ()
void	setTextModeEnabled (bool enabled)
int	state () const
Status	status () const
int	ungetch (int ch)
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)
qint64	writeBlock (const QByteArray &data)
qint64	writeBlock (const char *data, quint64 size)
Public Member Functions inherited from QObject
	QObject (QObject *parent)
	QObject (QObject *parent, const char *name)
virtual	~QObject ()
bool	blockSignals (bool block)
QObject *	child (const char *objName, const char *inheritsClass, bool recursiveSearch) const
const QObjectList &	children () const
const char *	className () const
bool	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const QObject *receiver, const char *method)
bool	disconnect (const char *signal, const QObject *receiver, const char *method)
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) const
QList< T >	findChildren (const QRegExp &regExp) const
QList< T >	findChildren (const QString &name) const
bool	inherits (const char *className) const
void	insertChild (QObject *object)
void	installEventFilter (QObject *filterObj)
bool	isA (const char *className) const
bool	isWidgetType () const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const
void	moveToThread (QThread *targetThread)
const char *	name () const
const char *	name (const char *defaultName) const
QString	objectName () const
QObject *	parent () const
QVariant	property (const char *name) const
void	removeChild (QObject *object)
void	removeEventFilter (QObject *obj)
void	setName (const char *name)
void	setObjectName (const QString &name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	signalsBlocked () const
int	startTimer (int interval)
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 }
Static Public Member Functions inherited from QObject
bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
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)
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	Offset
typedef	OpenMode
typedef	Status
Protected Slots inherited from KNetwork::KClientSocketBase
virtual void	slotReadActivity ()
virtual void	slotWriteActivity ()
Protected Member Functions inherited from KNetwork::KClientSocketBase
void	copyError ()
virtual qint64	peekData (char *data, qint64 maxlen, KSocketAddress *from)
virtual qint64	readData (char *data, qint64 maxlen, KSocketAddress *from)
virtual bool	setSocketOptions (int opts)
void	setState (SocketState state)
virtual void	stateChanging (SocketState newState)
virtual qint64	writeData (const char *data, qint64 len, const KSocketAddress *to)
Protected Member Functions inherited from KNetwork::KActiveSocketBase
virtual qint64	readData (char *data, qint64 len)
void	resetError ()
void	setError (SocketError error)
virtual qint64	writeData (const char *data, qint64 len)
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
bool	checkConnectArgs (const char *signal, const QObject *object, const char *method)
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const char *signal)
virtual void	customEvent (QEvent *event)
virtual void	disconnectNotify (const char *signal)
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
Static Protected Member Functions inherited from QObject
QByteArray	normalizeSignalSlot (const char *signalSlot)
Properties inherited from QObject
	objectName

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.nosp@m.o@kd.nosp@m.e.org

Version

0.9

Deprecated:

Use KSocketFactory or KLocalSocket instead

Definition at line 98 of file k3streamsocket.h.

Constructor & Destructor Documentation

KStreamSocket::KStreamSocket ( const QString &  node = QString(), const QString &  service = QString(), QObject *  parent = 0L  )

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()  )

virtual

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 98 of file k3streamsocket.cpp.

bool KStreamSocket::bind ( const KResolverEntry &  entry )

virtual

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 110 of file k3streamsocket.cpp.

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

virtual

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 115 of file k3streamsocket.cpp.

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

virtual

Unshadowing from KClientSocketBase.

Reimplemented from KNetwork::KClientSocketBase.

Definition at line 204 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 90 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.

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

• k3streamsocket.h
• k3streamsocket.cpp