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QUrlOperator(3qt)								QUrlOperator(3qt)

NAME
       QUrlOperator - Common operations on URLs

SYNOPSIS
       #include <qurloperator.h>

       Inherits QObject and QUrl.

   Public Members
       QUrlOperator ()
       QUrlOperator ( const QString & url )
       QUrlOperator ( const QUrlOperator & url )
       QUrlOperator ( const QUrlOperator & url, const QString & relUrl, bool checkSlash = FALSE )
       virtual ~QUrlOperator ()
       virtual const QNetworkOperation * listChildren ()
       virtual const QNetworkOperation * mkdir ( const QString & dirname )
       virtual const QNetworkOperation * remove ( const QString & filename )
       virtual const QNetworkOperation * rename ( const QString & oldname, const QString &
	   newname )
       virtual const QNetworkOperation * get ( const QString & location = QString::null )
       virtual const QNetworkOperation * put ( const QByteArray & data, const QString & location
	   = QString::null )
       virtual QPtrList<QNetworkOperation> copy ( const QString & from, const QString & to, bool
	   move = FALSE, bool toPath = TRUE )
       virtual void copy ( const QStringList & files, const QString & dest, bool move = FALSE )
       virtual bool isDir ( bool * ok = 0 )
       virtual void setNameFilter ( const QString & nameFilter )
       QString nameFilter () const
       virtual QUrlInfo info ( const QString & entry ) const
       virtual void stop ()

   Signals
       void newChildren ( const QValueList<QUrlInfo> & i, QNetworkOperation * op )
       void finished ( QNetworkOperation * op )
       void start ( QNetworkOperation * op )
       void createdDirectory ( const QUrlInfo & i, QNetworkOperation * op )
       void removed ( QNetworkOperation * op )
       void itemChanged ( QNetworkOperation * op )
       void data ( const QByteArray & data, QNetworkOperation * op )
       void dataTransferProgress ( int bytesDone, int bytesTotal, QNetworkOperation * op )
       void startedNextCopy ( const QPtrList<QNetworkOperation> & lst )
       void connectionStateChanged ( int state, const QString & data )

   Protected Members
       virtual void clearEntries ()
       void getNetworkProtocol ()
       void deleteNetworkProtocol ()

RELATED FUNCTION DOCUMENTATION
       void qInitNetworkProtocols ()

DESCRIPTION
       The QUrlOperator class provides common operations on URLs.

       This class operates on hierarchical structures (such as filesystems) using URLs. Its API
       facilitates all the common operations: <center>.nf

       </center>

       You can obtain additional information about the URL with isDir() and info(). If a
       directory is to be traversed using listChildren(), a name filter can be set with
       setNameFilter().

       A QUrlOperator can be used like this, for example to download a file (and assuming that
       the FTP protocol is registered):

	   QUrlOperator *op = new QUrlOperator();
	   op->copy( QString("ftp://ftp.trolltech.com/qt/source/qt-2.1.0.tar.gz"),
		    "file:/tmp" );

       If you want to be notified about success/failure, progress, etc., you can connect to
       QUrlOperator's signals, e.g. to start(), newChildren(), createdDirectory(), removed(),
       data(), dataTransferProgress(), startedNextCopy(), connectionStateChanged(), finished(),
       etc. A network operation can be stopped with stop().

       The class uses the functionality of registered network protocols to perform these
       operations. Depending of the protocol of the URL, it uses an appropriate network protocol
       class for the operations. Each of the operation functions of QUrlOperator creates a
       QNetworkOperation object that describes the operation and puts it into the operation queue
       for the network protocol used. If no suitable protocol could be found (because no
       implementation of the necessary network protocol is registered), the URL operator emits
       errors. Not every protocol supports every operation, but error handling deals with this
       problem.

       To register the available network protocols, use the qInitNetworkProtocols() function. The
       protocols currently supported are:

       FTP,

       HTTP,

       local file system.

       For more information about the Qt Network Architecture see the Qt Network Documentation.

       See also QNetworkProtocol, QNetworkOperation, Input/Output and Networking, and
       Miscellaneous Classes.

MEMBER FUNCTION DOCUMENTATION
QUrlOperator::QUrlOperator ()
       Constructs a QUrlOperator with an empty (i.e. invalid) URL.

QUrlOperator::QUrlOperator ( const QString & url )
       Constructs a QUrlOperator using url and parses this string.

       If you pass strings like "/home/qt" the "file" protocol is assumed.

QUrlOperator::QUrlOperator ( const QUrlOperator & url )
       Constructs a copy of url.

QUrlOperator::QUrlOperator ( const QUrlOperator & url, const QString & relUrl, bool checkSlash =
       FALSE )
       Constructs a QUrlOperator. The URL on which this QUrlOperator operates is constructed out
       of the arguments url, relUrl and checkSlash: see the corresponding QUrl constructor for an
       explanation of these arguments.

QUrlOperator::~QUrlOperator () [virtual]
       Destructor.

void QUrlOperator::clearEntries () [virtual protected]
       Clears the cache of children.

void QUrlOperator::connectionStateChanged ( int state, const QString & data ) [signal]
       This signal is emitted whenever the URL operator's connection state changes. state
       describes the new state, which is a QNetworkProtocol::ConnectionState value.

       data is a string that describes the change of the connection. This can be used to display
       a message to the user.

QPtrList<;QNetworkOperation> QUrlOperator::copy ( const QString & from, const QString & to, bool
       move = FALSE, bool toPath = TRUE ) [virtual]
       Copies the file from to to. If move is TRUE, the file is moved (copied and removed). from
       must point to a file and to must point to a directory (into which from is copied) unless
       toPath is set to FALSE. If toPath is set to FALSE then the to variable is assumed to be
       the absolute file path (destination file path + file name). The copying is done using the
       get() and put() operations. If you want to be notified about the progress of the
       operation, connect to the dataTransferProgress() signal. Bear in mind that the get() and
       put() operations emit this signal through the QUrlOperator. The number of transferred
       bytes and the total bytes that you receive as arguments in this signal do not relate to
       the the whole copy operation; they relate first to the get() and then to the put()
       operation. Always check what type of operation the signal comes from; this is given in the
       signal's last argument.

       At the end, finished() (with success or failure) is emitted, so check the state of the
       network operation object to see whether or not the operation was successful.

       Because a move or copy operation consists of multiple operations (get(), put() and maybe
       remove()), this function doesn't return a single QNetworkOperation, but rather a list of
       them. They are in the order: get(), put() and (if applicable) remove().

       See also get() and put().

void QUrlOperator::copy ( const QStringList & files, const QString & dest, bool move = FALSE )
       [virtual]
       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       Copies the files to the directory dest. If move is TRUE the files are moved, not copied.
       dest must point to a directory.

       This function calls copy() for each entry in files in turn. You don't get a result from
       this function; each time a new copy begins, startedNextCopy() is emitted, with a list of
       QNetworkOperations that describe the new copy operation.

void QUrlOperator::createdDirectory ( const QUrlInfo & i, QNetworkOperation * op ) [signal]
       This signal is emitted when mkdir() succeeds and the directory has been created. i holds
       the information about the new directory.

       op is a pointer to the operation object, which contains all the information about the
       operation, including the state. op->arg(0) holds the new directory's name.

       See also QNetworkOperation and QNetworkProtocol.

void QUrlOperator::data ( const QByteArray & data, QNetworkOperation * op ) [signal]
       This signal is emitted when new data has been received after calling get() or put(). op is
       a pointer to the operation object which contains all the information about the operation,
       including the state. op->arg(0) holds the name of the file whose data is retrieved and
       op->rawArg(1) holds the (raw) data.

       See also QNetworkOperation and QNetworkProtocol.

void QUrlOperator::dataTransferProgress ( int bytesDone, int bytesTotal, QNetworkOperation * op )
       [signal]
       This signal is emitted during data transfer (using put() or get()). bytesDone specifies
       how many bytes of bytesTotal have been transferred. More information about the operation
       is stored in op, a pointer to the network operation that is processed. bytesTotal may be
       -1, which means that the total number of bytes is not known.

       See also QNetworkOperation and QNetworkProtocol.

void QUrlOperator::deleteNetworkProtocol () [protected]
       Deletes the currently used network protocol.

void QUrlOperator::finished ( QNetworkOperation * op ) [signal]
       This signal is emitted when an operation of some sort finishes, whether with success or
       failure. op is a pointer to the operation object, which contains all the information,
       including the state, of the operation which has been finished. Check the state and error
       code of the operation object to see whether or not the operation was successful.

       See also QNetworkOperation and QNetworkProtocol.

const QNetworkOperation * QUrlOperator::get ( const QString & location = QString::null )
       [virtual]
       Tells the network protocol to get data from location or, if this is QString::null, to get
       data from the location to which this URL points (see QUrl::fileName() and
       QUrl::encodedPathAndQuery()). What happens then depends on the network protocol. The
       data() signal is emitted when data comes in. Because it's unlikely that all data will come
       in at once, it is common for multiple data() signals to be emitted. The
       dataTransferProgress() signal is emitted while processing the operation. At the end,
       finished() (with success or failure) is emitted, so check the state of the network
       operation object to see whether or not the operation was successful.

       If location is QString::null, the path of this QUrlOperator should point to a file when
       you use this operation. If location is not empty, it can be a relative URL (a child of the
       path to which the QUrlOperator points) or an absolute URL.

       For example, to get a web page you might do something like this:

	   QUrlOperator op( "http://www.whatever.org/cgi-bin/search.pl?cmd=Hello" );
	   op.get();

       For most other operations, the path of the QUrlOperator must point to a directory. If you
       want to download a file you could do the following:

	   QUrlOperator op( "ftp://ftp.whatever.org/pub" );
	   // do some other stuff like op.listChildren() or op.mkdir( "new_dir" )
	   op.get( "a_file.txt" );

       This will get the data of ftp://ftp.whatever.org/pub/a_file.txt.

       Never do anything like this:

	   QUrlOperator op( "http://www.whatever.org/cgi-bin" );
	   op.get( "search.pl?cmd=Hello" ); // WRONG!

       If location is not empty and relative it must not contain any queries or references, just
       the name of a child. So if you need to specify a query or reference, do it as shown in the
       first example or specify the full URL (such as http://www.whatever.org/cgi-
       bin/search.pl?cmd=Hello) as location.

       See also copy().

void QUrlOperator::getNetworkProtocol () [protected]
       Finds a network protocol for the URL and deletes the old network protocol.

QUrlInfo QUrlOperator::info ( const QString & entry ) const [virtual]
       Returns the URL information for the child entry, or returns an empty QUrlInfo object if
       there is no information available about entry. Information about entry is only available
       after a successfully finished listChildren() operation.

bool QUrlOperator::isDir ( bool * ok = 0 ) [virtual]
       Returns TRUE if the URL is a directory; otherwise returns FALSE. This may not always work
       correctly, if the protocol of the URL is something other than file (local filesystem). If
       you pass a bool pointer as the ok argument, *ok is set to TRUE if the result of this
       function is known to be correct, and to FALSE otherwise.

void QUrlOperator::itemChanged ( QNetworkOperation * op ) [signal]
       This signal is emitted whenever a file which is a child of the URL has been changed, for
       example by successfully calling rename(). op is a pointer to the operation object which
       contains all the information about the operation, including the state. op->arg(0) holds
       the original file name and op->arg(1) holds the new file name (if it was changed).

       See also QNetworkOperation and QNetworkProtocol.

const QNetworkOperation * QUrlOperator::listChildren () [virtual]
       Starts listing the children of this URL (e.g. the files in the directory). The start()
       signal is emitted before the first entry is listed and finished() is emitted after the
       last one. The newChildren() signal is emitted for each list of new entries. If an error
       occurs, the signal finished() is emitted, so be sure to check the state of the network
       operation pointer.

       Because the operation may not be executed immediately, a pointer to the QNetworkOperation
       object created by this function is returned. This object contains all the data about the
       operation and is used to refer to this operation later (e.g. in the signals that are
       emitted by the QUrlOperator). The return value can also be 0 if the operation object
       couldn't be created.

       The path of this QUrlOperator must to point to a directory (because the children of this
       directory will be listed), not to a file.

const QNetworkOperation * QUrlOperator::mkdir ( const QString & dirname ) [virtual]
       Tries to create a directory (child) with the name dirname. If it is successful, a
       newChildren() signal with the new child is emitted, and the createdDirectory() signal with
       the information about the new child is also emitted. The finished() signal (with success
       or failure) is emitted after the operation has been processed, so check the state of the
       network operation object to see whether or not the operation was successful.

       Because the operation will not be executed immediately, a pointer to the QNetworkOperation
       object created by this function is returned. This object contains all the data about the
       operation and is used to refer to this operation later (e.g. in the signals that are
       emitted by the QUrlOperator). The return value can also be 0 if the operation object
       couldn't be created.

       The path of this QUrlOperator must to point to a directory (not a file) because the new
       directory will be created in this path.

QString QUrlOperator::nameFilter () const
       Returns the name filter of the URL.

       See also QUrlOperator::setNameFilter() and QDir::nameFilter().

void QUrlOperator::newChildren ( const QValueList<QUrlInfo> & i, QNetworkOperation * op )
       [signal]
       This signal is emitted after listChildren() was called and new children (i.e. files) have
       been read from a list of files. i holds the information about the new files. op is a
       pointer to the operation object which contains all the information about the operation,
       including the state.

       See also QNetworkOperation and QNetworkProtocol.

const QNetworkOperation * QUrlOperator::put ( const QByteArray & data, const QString & location =
       QString::null ) [virtual]
       This function tells the network protocol to put data in location. If location is empty
       (QString::null), it puts the data in the location to which the URL points. What happens
       depends on the network protocol. Depending on the network protocol, some data might come
       back after putting data, in which case the data() signal is emitted. The
       dataTransferProgress() signal is emitted during processing of the operation. At the end,
       finished() (with success or failure) is emitted, so check the state of the network
       operation object to see whether or not the operation was successful.

       If location is QString::null, the path of this QUrlOperator should point to a file when
       you use this operation. If location is not empty, it can be a relative (a child of the
       path to which the QUrlOperator points) or an absolute URL.

       For putting some data to a file you can do the following:

	   QUrlOperator op( "ftp://ftp.whatever.com/home/me/filename.dat" );
	   op.put( data );

       For most other operations, the path of the QUrlOperator must point to a directory. If you
       want to upload data to a file you could do the following:

	   QUrlOperator op( "ftp://ftp.whatever.com/home/me" );
	   // do some other stuff like op.listChildren() or op.mkdir( "new_dir" )
	   op.put( data, "filename.dat" );

       This will upload the data to ftp://ftp.whatever.com/home/me/filename.dat.

       See also copy().

const QNetworkOperation * QUrlOperator::remove ( const QString & filename ) [virtual]
       Tries to remove the file (child) filename. If it succeeds the removed() signal is emitted.
       finished() (with success or failure) is also emitted after the operation has been
       processed, so check the state of the network operation object to see whether or not the
       operation was successful.

       Because the operation will not be executed immediately, a pointer to the QNetworkOperation
       object created by this function is returned. This object contains all the data about the
       operation and is used to refer to this operation later (e.g. in the signals that are
       emitted by the QUrlOperator). The return value can also be 0 if the operation object
       couldn't be created.

       The path of this QUrlOperator must point to a directory; because if filename is relative,
       it will try to remove it in this directory.

void QUrlOperator::removed ( QNetworkOperation * op ) [signal]
       This signal is emitted when remove() has been succesful and the file has been removed.

       op is a pointer to the operation object which contains all the information about the
       operation, including the state. op->arg(0) holds the name of the file that was removed.

       See also QNetworkOperation and QNetworkProtocol.

const QNetworkOperation * QUrlOperator::rename ( const QString & oldname, const QString & newname
       ) [virtual]
       Tries to rename the file (child) called oldname to newname. If it succeeds, the
       itemChanged() signal is emitted. finished() (with success or failure) is also emitted
       after the operation has been processed, so check the state of the network operation object
       to see whether or not the operation was successful.

       Because the operation may not be executed immediately, a pointer to the QNetworkOperation
       object created by this function is returned. This object contains all the data about the
       operation and is used to refer to this operation later (e.g. in the signals that are
       emitted by the QUrlOperator). The return value can also be 0 if the operation object
       couldn't be created.

       This path of this QUrlOperator must to point to a directory because oldname and newname
       are handled relative to this directory.

void QUrlOperator::setNameFilter ( const QString & nameFilter ) [virtual]
       Sets the name filter of the URL to nameFilter.

       See also QDir::setNameFilter().

void QUrlOperator::start ( QNetworkOperation * op ) [signal]
       Some operations (such as listChildren()) emit this signal when they start processing the
       operation. op is a pointer to the operation object which contains all the information
       about the operation, including the state.

       See also QNetworkOperation and QNetworkProtocol.

void QUrlOperator::startedNextCopy ( const QPtrList<QNetworkOperation> & lst ) [signal]
       This signal is emitted if copy() starts a new copy operation. lst contains all
       QNetworkOperations related to this copy operation.

       See also copy().

void QUrlOperator::stop () [virtual]
       Stops the current network operation and removes all this QUrlOperator's waiting network
       operations.

RELATED FUNCTION DOCUMENTATION
void qInitNetworkProtocols ()
       This function registers the network protocols for FTP and HTTP. You must call this
       function before you use QUrlOperator for these protocols.

       This function is declared in qnetwork.h.

SEE ALSO
       http://doc.trolltech.com/qurloperator.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the license file
       included in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qurloperator.3qt) and the Qt version (3.3.8).

Trolltech AS				 2 February 2007			QUrlOperator(3qt)
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