#include <qnetworkfile_p.h>

Inheritance diagram for QNetworkFile:

Collaboration diagram for QNetworkFile:

Public Slots
void	open ()

void	close () override

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Signals
void	finished (bool ok)

void	headerRead (QNetworkRequest::KnownHeaders header, const QVariant &value)

void	error (QNetworkReply::NetworkError error, const QString &message)

Signals inherited from QIODevice
void	readyRead ()
	This signal is emitted once every time new data is available for reading from the device's current read channel.

void	channelReadyRead (int channel)

void	bytesWritten (qint64 bytes)
	This signal is emitted every time a payload of data has been written to the device's current write channel.

void	channelBytesWritten (int channel, qint64 bytes)

void	aboutToClose ()
	This signal is emitted when the device is about to close.

void	readChannelFinished ()

Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.

void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.

Public Member Functions
	QNetworkFile ()

	QNetworkFile (const QString &name)

QFILE_MAYBE_NODISCARD bool	open (OpenMode flags) override
	Opens the file using OpenMode mode, returning true if successful; otherwise false.

QFILE_MAYBE_NODISCARD bool	open (OpenMode flags, Permissions permissions)

QFILE_MAYBE_NODISCARD bool	open (FILE *f, OpenMode ioFlags, FileHandleFlags handleFlags=DontCloseHandle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file handle fh in the given mode.

QFILE_MAYBE_NODISCARD bool	open (int fd, OpenMode ioFlags, FileHandleFlags handleFlags=DontCloseHandle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file descriptor fd in the given mode.

Public Member Functions inherited from QFile
	QFile ()
	Constructs a QFile object.

QFILE_MAYBE_EXPLICIT	QFile (const QString &name)

	QFile (QObject *parent)
	Constructs a new file object with the given parent.

	QFile (const QString &name, QObject *parent)
	Constructs a new file object with the given parent to represent the file with the specified name.

	~QFile ()
	Destroys the file object, closing it if necessary.

QString	fileName () const override
	Returns the name set by setFileName() or to the QFile constructors.

void	setFileName (const QString &name)
	Sets the name of the file.

bool	exists () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns `true` if the file specified by fileName() exists; otherwise returns `false`.

QString	symLinkTarget () const

bool	remove ()
	Removes the file specified by fileName().

bool	moveToTrash ()

bool	rename (const QString &newName)
	Renames the file currently specified by fileName() to newName.

bool	link (const QString &newName)
	Creates a link named linkName that points to the file currently specified by fileName().

bool	copy (const QString &newName)
	Copies the file named fileName() to newName.

QFILE_MAYBE_NODISCARD bool	open (OpenMode flags) override
	Opens the file using OpenMode mode, returning true if successful; otherwise false.

QFILE_MAYBE_NODISCARD bool	open (OpenMode flags, Permissions permissions)

QFILE_MAYBE_NODISCARD bool	open (FILE *f, OpenMode ioFlags, FileHandleFlags handleFlags=DontCloseHandle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file handle fh in the given mode.

QFILE_MAYBE_NODISCARD bool	open (int fd, OpenMode ioFlags, FileHandleFlags handleFlags=DontCloseHandle)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file descriptor fd in the given mode.

qint64	size () const override
	\reimp

bool	resize (qint64 sz) override
	\reimp

Permissions	permissions () const override
	\reimp

bool	setPermissions (Permissions permissionSpec) override
	Sets the permissions for the file to the permissions specified.

Public Member Functions inherited from QFileDevice
	~QFileDevice ()
	Destroys the file device, closing it if necessary.

FileError	error () const
	Returns the file error status.

void	unsetError ()
	Sets the file's error to QFileDevice::NoError.

void	close () override
	Calls QFileDevice::flush() and closes the file.

bool	isSequential () const override
	Returns `true` if the file can only be manipulated sequentially; otherwise returns `false`.

int	handle () const
	Returns the file handle of the file.

qint64	pos () const override
	\reimp

bool	seek (qint64 offset) override
	For random-access devices, this function sets the current position to pos, returning true on success, or false if an error occurred.

bool	atEnd () const override
	Returns `true` if the end of the file has been reached; otherwise returns false.

bool	flush ()
	Flushes any buffered data to the file.

qint64	size () const override
	Returns the size of the file.

uchar *	map (qint64 offset, qint64 size, MemoryMapFlags flags=NoOptions)
	Maps size bytes of the file into memory starting at offset.

bool	unmap (uchar *address)
	Unmaps the memory address.

QDateTime	fileTime (QFileDevice::FileTime time) const

bool	setFileTime (const QDateTime &newDate, QFileDevice::FileTime fileTime)

Public Member Functions inherited from QIODevice
	QIODevice ()
	Constructs a QIODevice object.

	QIODevice (QObject *parent)
	Constructs a QIODevice object with the given parent.

virtual	~QIODevice ()
	The destructor is virtual, and QIODevice is an abstract base class.

QIODeviceBase::OpenMode	openMode () const
	Returns the mode in which the device has been opened; i.e.

void	setTextModeEnabled (bool enabled)
	If enabled is true, this function sets the \l Text flag on the device; otherwise the \l Text flag is removed.

bool	isTextModeEnabled () const
	Returns `true` if the \l Text flag is enabled; otherwise returns `false`.

bool	isOpen () const
	Returns `true` if the device is open; otherwise returns `false`.

bool	isReadable () const
	Returns `true` if data can be read from the device; otherwise returns false.

bool	isWritable () const
	Returns `true` if data can be written to the device; otherwise returns false.

int	readChannelCount () const

int	writeChannelCount () const

int	currentReadChannel () const

void	setCurrentReadChannel (int channel)

int	currentWriteChannel () const

void	setCurrentWriteChannel (int channel)

virtual bool	open (QIODeviceBase::OpenMode mode)
	Opens the device and sets its OpenMode to mode.

virtual bool	reset ()
	Seeks to the start of input for random-access devices.

virtual qint64	bytesAvailable () const
	Returns the number of bytes that are available for reading.

virtual qint64	bytesToWrite () const
	For buffered devices, this function returns the number of bytes waiting to be written.

qint64	read (char *data, qint64 maxlen)
	Reads at most maxSize bytes from the device into data, and returns the number of bytes read.

QByteArray	read (qint64 maxlen)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Reads at most maxSize bytes from the device, and returns the data read as a QByteArray.

QByteArray	readAll ()
	Reads all remaining data from the device, and returns it as a byte array.

qint64	readLine (char *data, qint64 maxlen)
	This function reads a line of ASCII characters from the device, up to a maximum of maxSize - 1 bytes, stores the characters in data, and returns the number of bytes read.

QByteArray	readLine (qint64 maxlen=0)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Reads a line from the device, but no more than maxSize characters, and returns the result as a byte array.

virtual bool	canReadLine () const
	Returns `true` if a complete line of data can be read from the device; otherwise returns `false`.

void	startTransaction ()

void	commitTransaction ()

void	rollbackTransaction ()

bool	isTransactionStarted () const

qint64	write (const char *data, qint64 len)
	Writes at most maxSize bytes of data from data to the device.

qint64	write (const char *data)

qint64	write (const QByteArray &data)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Writes the content of data to the device.

qint64	peek (char *data, qint64 maxlen)

QByteArray	peek (qint64 maxlen)

qint64	skip (qint64 maxSize)

virtual bool	waitForReadyRead (int msecs)
	Blocks until new data is available for reading and the readyRead() signal has been emitted, or until msecs milliseconds have passed.

virtual bool	waitForBytesWritten (int msecs)
	For buffered devices, this function waits until a payload of buffered written data has been written to the device and the bytesWritten() signal has been emitted, or until msecs milliseconds have passed.

void	ungetChar (char c)
	Puts the character c back into the device, and decrements the current position unless the position is 0.

bool	putChar (char c)
	Writes the character c to the device.

bool	getChar (char *c)
	Reads one character from the device and stores it in c.

QString	errorString () const
	Returns a human-readable description of the last device error that occurred.

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.

virtual	~QObject ()
	Destroys the object, deleting all its child objects.

virtual bool	event (QEvent *event)
	This virtual function receives events to an object and should return true if the event e was recognized and processed.

virtual bool	eventFilter (QObject watched, QEvent event)
	Filters events if this object has been installed as an event filter for the watched object.

QString	objectName () const

Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.

void	setObjectName (QAnyStringView name)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const
	Returns `true` if the object is a widget; otherwise returns `false`.

bool	isWindowType () const
	Returns `true` if the object is a window; otherwise returns `false`.

bool	isQuickItemType () const
	Returns `true` if the object is a QQuickItem; otherwise returns `false`.

bool	signalsBlocked () const noexcept
	Returns `true` if signals are blocked; otherwise returns `false`.

bool	blockSignals (bool b) noexcept
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).

QThread *	thread () const
	Returns the thread in which the object lives.

bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns `true` on success.

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.

int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)

void	killTimer (int id)
	Kills the timer with timer identifier, id.

void	killTimer (Qt::TimerId id)

template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.

template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.

template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

const QObjectList &	children () const
	Returns a list of child objects.

void	setParent (QObject *parent)
	Makes the object a child of parent.

void	installEventFilter (QObject *filterObj)
	Installs an event filter filterObj on this object.

void	removeEventFilter (QObject *obj)
	Removes an event filter object obj from this object.

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

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const
	Dumps a tree of children to the debug output.

void	dumpObjectInfo () const
	Dumps information about signal connections, etc.

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value.

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

QVariant	property (const char *name) const
	Returns the value of the object's name property.

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const
	Returns a pointer to the parent object.

bool	inherits (const char *classname) const
	Returns `true` if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns `false`.

Additional Inherited Members
Public Types inherited from QFileDevice
enum	FileError { NoError = 0 , ReadError = 1 , WriteError = 2 , FatalError = 3 , ResourceError = 4 , OpenError = 5 , AbortError = 6 , TimeOutError = 7 , UnspecifiedError = 8 , RemoveError = 9 , RenameError = 10 , PositionError = 11 , ResizeError = 12 , PermissionsError = 13 , CopyError = 14 }
	This enum describes the errors that may be returned by the error() function. More...

enum	FileTime { FileAccessTime , FileBirthTime , FileMetadataChangeTime , FileModificationTime }

enum	Permission { ReadOwner = 0x4000 , WriteOwner = 0x2000 , ExeOwner = 0x1000 , ReadUser = 0x0400 , WriteUser = 0x0200 , ExeUser = 0x0100 , ReadGroup = 0x0040 , WriteGroup = 0x0020 , ExeGroup = 0x0010 , ReadOther = 0x0004 , WriteOther = 0x0002 , ExeOther = 0x0001 }
	This enum is used by the permission() function to report the permissions and ownership of a file. More...

enum	FileHandleFlag { AutoCloseHandle = 0x0001 , DontCloseHandle = 0 }
	This enum is used when opening a file to specify additional options which only apply to files and not to a generic QIODevice. More...

enum	MemoryMapFlag { NoOptions = 0 , MapPrivateOption = 0x0001 }

Public Types inherited from QIODeviceBase
enum	OpenModeFlag { NotOpen = 0x0000 , ReadOnly = 0x0001 , WriteOnly = 0x0002 , ReadWrite = ReadOnly \| WriteOnly , Append = 0x0004 , Truncate = 0x0008 , Text = 0x0010 , Unbuffered = 0x0020 , NewOnly = 0x0040 , ExistingOnly = 0x0080 }
	This enum is used with QIODevice::open() to describe the mode in which a device is opened. More...

Static Public Member Functions inherited from QFile
static QByteArray	encodeName (const QString &fileName)
	Converts fileName to an 8-bit encoding that you can use in native APIs.

static QString	decodeName (const QByteArray &localFileName)
	This does the reverse of QFile::encodeName() using localFileName.

static QString	decodeName (const char *localFileName)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the Unicode version of the given localFileName.

static bool	exists (const QString &fileName)
	Returns `true` if the file specified by fileName exists; otherwise returns `false`.

static QString	symLinkTarget (const QString &fileName)

static bool	remove (const QString &fileName)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Removes the file specified by the fileName given.

static bool	moveToTrash (const QString &fileName, QString *pathInTrash=nullptr)

static bool	rename (const QString &oldName, const QString &newName)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Renames the file oldName to newName.

static bool	link (const QString &fileName, const QString &newName)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Creates a link named linkName that points to the file fileName.

static bool	copy (const QString &fileName, const QString &newName)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Copies the file named fileName to newName.

static bool	resize (const QString &filename, qint64 sz)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets fileName to size (in bytes) sz.

static Permissions	permissions (const QString &filename)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the complete OR-ed together combination of QFile::Permission for fileName.

static bool	setPermissions (const QString &filename, Permissions permissionSpec)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the permissions for fileName file to permissions.

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	\threadsafe

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

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	\threadsafe

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

static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a connection.

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Protected Member Functions inherited from QFile
	QFile (QFilePrivate &dd, QObject *parent=nullptr)

Protected Member Functions inherited from QFileDevice
	QFileDevice ()
	\macro QT_USE_NODISCARD_FILE_OPEN \macro QT_NO_USE_NODISCARD_FILE_OPEN

	QFileDevice (QObject *parent)

	QFileDevice (QFileDevicePrivate &dd, QObject *parent=nullptr)

qint64	readData (char *data, qint64 maxlen) override
	\reimp

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

qint64	readLineData (char *data, qint64 maxlen) override
	\reimp

Protected Member Functions inherited from QIODevice
	QIODevice (QIODevicePrivate &dd, QObject *parent=nullptr)

virtual qint64	skipData (qint64 maxSize)

void	setOpenMode (QIODeviceBase::OpenMode openMode)
	Sets the OpenMode of the device to openMode.

void	setErrorString (const QString &errorString)
	Sets the human readable description of the last device error that occurred to str.

Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.

int	senderSignalIndex () const

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal.

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	timerEvent (QTimerEvent *event)
	This event handler can be reimplemented in a subclass to receive timer events for the object.

virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.

virtual void	customEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive custom events.

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Protected Member Functions inherited from QIODeviceBase
	~QIODeviceBase ()=default

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Properties inherited from QObject
QString	objectName
	the name of this object

Related Symbols inherited from QFileDevice
	QFileDevice ()
	\macro QT_USE_NODISCARD_FILE_OPEN \macro QT_NO_USE_NODISCARD_FILE_OPEN

Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

Definition at line 24 of file qnetworkfile_p.h.

Constructor & Destructor Documentation

◆ QNetworkFile() [1/2]

QT_BEGIN_NAMESPACE QNetworkFile::QNetworkFile ( )

Definition at line 15 of file qnetworkfile.cpp.

◆ QNetworkFile() [2/2]

QNetworkFile::QNetworkFile ( const QString & name )

Definition at line 20 of file qnetworkfile.cpp.

Member Function Documentation

◆ close

void QNetworkFile::close ( )

overrideslot

Definition at line 49 of file qnetworkfile.cpp.

References QFileDevice::close().

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◆ error

void QNetworkFile::error	(	QNetworkReply::NetworkError	error,
		const QString &	message )

signal

◆ finished

void QNetworkFile::finished ( bool ok )

signal

Referenced by open().

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◆ headerRead

void QNetworkFile::headerRead	(	QNetworkRequest::KnownHeaders	header,
		const QVariant &	value )

signal

Referenced by QNetworkReplyFileImpl::QNetworkReplyFileImpl(), and open().

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◆ open [1/5]

void QNetworkFile::open ( )

slot

Definition at line 25 of file qnetworkfile.cpp.

References QNetworkReply::ContentAccessDenied, QNetworkRequest::ContentLengthHeader, QNetworkReply::ContentNotFoundError, QNetworkReply::ContentOperationNotPermittedError, emit, QFileDevice::error(), QIODevice::errorString(), QFile::exists(), QFile::fileName(), finished(), QVariant::fromValue(), headerRead(), QNetworkRequest::LastModifiedHeader, QFile::open(), QIODeviceBase::ReadOnly, QCoreApplication::translate(), and QIODeviceBase::Unbuffered.

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◆ open() [2/5]

bool QFile::open	(	FILE *	fh,
		OpenMode	mode,
		FileHandleFlags	handleFlags = DontCloseHandle )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file handle fh in the given mode.

handleFlags may be used to specify additional options. Returns true if successful; otherwise returns false.

Example:

#include <stdio.h>
 
void printError(const char* msg)
{
    QFile file;
    file.open(stderr, QIODevice::WriteOnly);
    file.write(msg, qstrlen(msg));        // write to stderr
    file.close();
}

When a QFile is opened using this function, behaviour of close() is controlled by the AutoCloseHandle flag. If AutoCloseHandle is specified, and this function succeeds, then calling close() closes the adopted handle. Otherwise, close() does not actually close the file, but only flushes it.

{Warning:} \list 1

If fh does not refer to a regular file, e.g., it is stdin, stdout, or stderr, you may not be able to seek(). size() returns 0 in those cases. See QIODevice::isSequential() for more information.
Since this function opens the file without specifying the file name, you cannot use this QFile with a QFileInfo. \endlist

See also: close(), QT_USE_NODISCARD_FILE_OPEN

{Note for the Windows Platform}

fh must be opened in binary mode (i.e., the mode string must contain 'b', as in "rb" or "wb") when accessing files and other random-access devices. Qt will translate the end-of-line characters if you pass QIODevice::Text to mode. Sequential devices, such as stdin and stdout, are unaffected by this limitation.

You need to enable support for console applications in order to use the stdin, stdout and stderr streams at the console. To do this, add the following declaration to your application's project file:

Definition at line 287 of file qfile.cpp.

◆ open() [3/5]

bool QFile::open	(	int	fd,
		OpenMode	mode,
		FileHandleFlags	handleFlags = DontCloseHandle )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Opens the existing file descriptor fd in the given mode.

handleFlags may be used to specify additional options. Returns true if successful; otherwise returns false.

When a QFile is opened using this function, behaviour of close() is controlled by the AutoCloseHandle flag. If AutoCloseHandle is specified, and this function succeeds, then calling close() closes the adopted handle. Otherwise, close() does not actually close the file, but only flushes it.

Warning: If fd is not a regular file, e.g, it is 0 (stdin), 1 (stdout), or 2 (stderr), you may not be able to seek(). In those cases, size() returns 0. See QIODevice::isSequential() for more information.; Since this function opens the file without specifying the file name, you cannot use this QFile with a QFileInfo.

See also: close(), QT_USE_NODISCARD_FILE_OPEN

Definition at line 288 of file qfile.cpp.

◆ open() [4/5]

bool QFile::open ( OpenMode mode )

override

Opens the file using OpenMode mode, returning true if successful; otherwise false.

The mode must be QIODevice::ReadOnly, QIODevice::WriteOnly, or QIODevice::ReadWrite. It may also have additional flags, such as QIODevice::Text and QIODevice::Unbuffered.

Note: In \l{QIODevice::}{WriteOnly} or \l{QIODevice::}{ReadWrite} mode, if the relevant file does not already exist, this function will try to create a new file before opening it. The file will be created with mode 0666 masked by the umask on POSIX systems, and with permissions inherited from the parent directory on Windows. On Android, it's expected to have access permission to the parent of the file name, otherwise, it won't be possible to create this non-existing file.

See also: QT_USE_NODISCARD_FILE_OPEN; QIODevice::OpenMode, setFileName()

Definition at line 285 of file qfile.cpp.

◆ open() [5/5]

QFILE_MAYBE_NODISCARD bool QFile::open	(	OpenMode	flags,
		Permissions	permissions )

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

qtbase/src/network/access/qnetworkfile_p.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/network/access/qnetworkfile.cpp (05fc3aef53348fb58be6308076e000825b704e58)

Public Slots

Signals

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QNetworkFile() [1/2]

◆ QNetworkFile() [2/2]

Member Function Documentation

◆ close

◆ error

◆ finished

◆ headerRead

◆ open [1/5]

◆ open() [2/5]

◆ open() [3/5]

◆ open() [4/5]

◆ open() [5/5]