/**************************************************************************** ** ** Implementation of TQNetworkProtocol class ** ** Created : 950429 ** ** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA. ** ** This file is part of the kernel module of the TQt GUI Toolkit. ** ** This file may be used under the terms of the GNU General ** Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the files LICENSE.GPL2 ** and LICENSE.GPL3 included in the packaging of this file. ** Alternatively you may (at your option) use any later version ** of the GNU General Public License if such license has been ** publicly approved by Trolltech ASA (or its successors, if any) ** and the KDE Free TQt Foundation. ** ** Please review the following information to ensure GNU General ** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** This file may be used under the terms of the Q Public License as ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL ** included in the packaging of this file. Licensees holding valid TQt ** Commercial licenses may use this file in accordance with the TQt ** Commercial License Agreement provided with the Software. ** ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted ** herein. ** **********************************************************************/ #include "tqnetworkprotocol.h" #ifndef TQT_NO_NETWORKPROTOCOL #include "tqlocalfs.h" #include "tqurloperator.h" #include "tqtimer.h" #include "tqmap.h" #include "tqptrqueue.h" //#define TQNETWORKPROTOCOL_DEBUG #define NETWORK_OP_DELAY 1000 extern TQ_EXPORT TQNetworkProtocolDict *qNetworkProtocolRegister; TQNetworkProtocolDict *qNetworkProtocolRegister = 0; class TQNetworkProtocolPrivate { public: TQNetworkProtocolPrivate( TQNetworkProtocol *p ) { url = 0; opInProgress = 0; opStartTimer = new TQTimer( p ); removeTimer = new TQTimer( p ); operationQueue.setAutoDelete( FALSE ); autoDelete = FALSE; removeInterval = 10000; oldOps.setAutoDelete( FALSE ); } ~TQNetworkProtocolPrivate() { removeTimer->stop(); if ( opInProgress ) { if ( opInProgress == operationQueue.head() ) operationQueue.dequeue(); opInProgress->free(); } while ( operationQueue.head() ) { operationQueue.head()->free(); operationQueue.dequeue(); } while ( oldOps.first() ) { oldOps.first()->free(); oldOps.removeFirst(); } delete opStartTimer; } TQUrlOperator *url; TQPtrQueue< TQNetworkOperation > operationQueue; TQNetworkOperation *opInProgress; TQTimer *opStartTimer, *removeTimer; int removeInterval; bool autoDelete; TQPtrList< TQNetworkOperation > oldOps; }; /*! \class TQNetworkProtocol tqnetworkprotocol.h \brief The TQNetworkProtocol class provides a common API for network protocols. \if defined(commercial) It is part of the TQt Enterprise Edition. \endif \module network \ingroup io \module network \mainclass This is a base class which should be used for network protocols implementations that can then be used in TQt (e.g. in the file dialog) together with the TQUrlOperator. The easiest way to implement a new network protocol is to reimplement the operation*() methods, e.g. operationGet(), etc. Only the supported operations should be reimplemented. To specify which operations are supported, also reimplement supportedOperations() and return an int that is OR'd together using the supported operations from the \l TQNetworkProtocol::Operation enum. When you implement a network protocol this way, it is important to emit the correct Q_SIGNALS. Also, always emit the finished() signal when an operation is done (on success \e and on failure). TQt relies on correctly emitted finished() Q_SIGNALS. For a detailed description of the TQt Network Architecture and how to implement and use network protocols in TQt, see the \link network.html TQt Network Documentation\endlink. */ /*! \fn void TQNetworkProtocol::newChildren( const TQValueList &i, TQNetworkOperation *op ) This signal is emitted after listChildren() was called and new tqchildren (files) have been read from the list of files. \a i holds the information about the new tqchildren. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. When implementing your own network protocol and reading tqchildren, you usually don't read one child at once, but rather a list of them. That's why this signal takes a list of TQUrlInfo objects. If you prefer to read just one child at a time you can use the convenience signal newChild(), which takes a single TQUrlInfo object. */ /*! \fn void TQNetworkProtocol::newChild( const TQUrlInfo &i, TQNetworkOperation *op ) This signal is emitted if a new child (file) has been read. TQNetworkProtocol automatically connects it to a slot which creates a list of TQUrlInfo objects (with just one TQUrlInfo \a i) and emits the newChildren() signal with this list. \a op is the pointer to the operation object which tqcontains all the information about the operation that has finished, including the state, etc. This is just a convenience signal useful for implementing your own network protocol. In all other cases connect to the newChildren() signal with its list of TQUrlInfo objects. */ /*! \fn void TQNetworkProtocol::finished( TQNetworkOperation *op ) This signal is emitted when an operation finishes. This signal is always emitted, for both success and failure. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. Check the state and error code of the operation object to determine whether or not the operation was successful. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::start( TQNetworkOperation *op ) Some operations (such as listChildren()) emit this signal when they start processing the operation. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::createdDirectory( const TQUrlInfo &i, TQNetworkOperation *op ) This signal is emitted when mkdir() has been succesful and the directory has been created. \a i holds the information about the new directory. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. Using op->arg( 0 ), you can get the file name of the new directory. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::removed( TQNetworkOperation *op ) This signal is emitted when remove() has been succesful and the file has been removed. \a op holds the file name of the removed file in the first argument, accessible with op->arg( 0 ). \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::itemChanged( TQNetworkOperation *op ) This signal is emitted whenever a file which is a child of this URL has been changed, e.g. by successfully calling rename(). \a op holds the original and the new file names in the first and second arguments, accessible with op->arg( 0 ) and op->arg( 1 ) respectively. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::data( const TQByteArray &data, TQNetworkOperation *op ) This signal is emitted when new \a data has been received after calling get() or put(). \a op holds the name of the file from which data is retrieved or uploaded in its first argument, and the (raw) data in its second argument. You can get them with op->arg( 0 ) and op->rawArg( 1 ). \a op is the pointer to the operation object, which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator (which is used by the network protocol) emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::dataTransferProgress( int bytesDone, int bytesTotal, TQNetworkOperation *op ) This signal is emitted during the transfer of data (using put() or get()). \a bytesDone is how many bytes of \a bytesTotal have been transferred. \a bytesTotal may be -1, which means that the total number of bytes is not known. \a op is the pointer to the operation object which tqcontains all the information about the operation, including the state, etc. When a protocol emits this signal, TQNetworkProtocol is smart enough to let the TQUrlOperator, which is used by the network protocol, emit its corresponding signal. */ /*! \fn void TQNetworkProtocol::connectionStateChanged( int state, const TQString &data ) This signal is emitted whenever the state of the connection of the network protocol is changed. \a state describes the new state, which is one of, \c ConHostFound, \c ConConnected or \c ConClosed. \a data is a message text. */ /*! \enum TQNetworkProtocol::State This enum tqcontains the state that a TQNetworkOperation can have. \value StWaiting The operation is in the TQNetworkProtocol's queue waiting to be prcessed. \value StInProgress The operation is being processed. \value StDone The operation has been processed succesfully. \value StFailed The operation has been processed but an error occurred. \value StStopped The operation has been processed but has been stopped before it finished, and is waiting to be processed. */ /*! \enum TQNetworkProtocol::Operation This enum lists the possible operations that a network protocol can support. supportedOperations() returns an int of these that is OR'd together. Also, the type() of a TQNetworkOperation is always one of these values. \value OpListChildren List the tqchildren of a URL, e.g. of a directory. \value OpMkDir Create a directory. \value OpRemove Remove a child (e.g. a file). \value OpRename Rename a child (e.g. a file). \value OpGet Get data from a location. \value OpPut Put data to a location. */ /*! \enum TQNetworkProtocol::ConnectionState When the connection state of a network protocol changes it emits the signal connectionStateChanged(). The first argument is one of the following values: \value ConHostFound Host has been found. \value ConConnected Connection to the host has been established. \value ConClosed Connection has been closed. */ /*! \enum TQNetworkProtocol::Error When an operation fails (finishes unsuccessfully), the TQNetworkOperation of the operation returns an error code which has one of the following values: \value NoError No error occurred. \value ErrValid The URL you are operating on is not valid. \value ErrUnknownProtocol There is no protocol implementation available for the protocol of the URL you are operating on (e.g. if the protocol is http and no http implementation has been registered). \value ErrUnsupported The operation is not supported by the protocol. \value ErrParse The URL could not be parsed correctly. \value ErrLoginIncorrect You needed to login but the username or password is wrong. \value ErrHostNotFound The specified host (in the URL) couldn't be found. \value ErrListChildren An error occurred while listing the tqchildren (files). \value ErrMkDir An error occurred when creating a directory. \value ErrRemove An error occurred when removing a child (file). \value ErrRename An error occurred when renaming a child (file). \value ErrGet An error occurred while getting (retrieving) data. \value ErrPut An error occurred while putting (uploading) data. \value ErrFileNotExisting A file which is needed by the operation doesn't exist. \value ErrPermissionDenied Permission for doing the operation has been denied. You should also use these error codes when implementing custom network protocols. If this is not possible, you can define your own error codes by using integer values that don't conflict with any of these values. */ /*! Constructor of the network protocol base class. Does some initialization and connecting of Q_SIGNALS and Q_SLOTS. */ TQNetworkProtocol::TQNetworkProtocol() : TQObject() { d = new TQNetworkProtocolPrivate( this ); connect( d->opStartTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( startOps() ) ); connect( d->removeTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( removeMe() ) ); if ( url() ) { connect( this, TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ), url(), TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( finished(TQNetworkOperation*) ), url(), TQT_SIGNAL( finished(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( start(TQNetworkOperation*) ), url(), TQT_SIGNAL( start(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SLOT( addEntry(const TQValueList&) ) ); connect( this, TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ), url(), TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( removed(TQNetworkOperation*) ), url(), TQT_SIGNAL( removed(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( itemChanged(TQNetworkOperation*) ), url(), TQT_SIGNAL( itemChanged(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ), url(), TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( connectionStateChanged(int,const TQString&) ), url(), TQT_SIGNAL( connectionStateChanged(int,const TQString&) ) ); } connect( this, TQT_SIGNAL( finished(TQNetworkOperation*) ), this, TQT_SLOT( processNextOperation(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( newChild(const TQUrlInfo&,TQNetworkOperation*) ), this, TQT_SLOT( emitNewChildren(const TQUrlInfo&,TQNetworkOperation*) ) ); } /*! Destructor. */ TQNetworkProtocol::~TQNetworkProtocol() { delete d; } /*! Sets the TQUrlOperator, on which the protocol works, to \a u. \sa TQUrlOperator */ void TQNetworkProtocol::setUrl( TQUrlOperator *u ) { if ( url() ) { disconnect( this, TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ), url(), TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( finished(TQNetworkOperation*) ), url(), TQT_SIGNAL( finished(TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( start(TQNetworkOperation*) ), url(), TQT_SIGNAL( start(TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SLOT( addEntry(const TQValueList&) ) ); disconnect( this, TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ), url(), TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( removed(TQNetworkOperation*) ), url(), TQT_SIGNAL( removed(TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( itemChanged(TQNetworkOperation*) ), url(), TQT_SIGNAL( itemChanged(TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ), url(), TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ) ); disconnect( this, TQT_SIGNAL( connectionStateChanged(int,const TQString&) ), url(), TQT_SIGNAL( connectionStateChanged(int,const TQString&) ) ); } // ### if autoDelete is TRUE, we should delete the TQUrlOperator (something // like below; but that is not possible since it would delete this, too). //if ( d->autoDelete && (d->url!=u) ) { // delete d->url; // destructor deletes the network protocol //} d->url = u; if ( url() ) { connect( this, TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ), url(), TQT_SIGNAL( data(const TQByteArray&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( finished(TQNetworkOperation*) ), url(), TQT_SIGNAL( finished(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( start(TQNetworkOperation*) ), url(), TQT_SIGNAL( start(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( newChildren(const TQValueList&,TQNetworkOperation*) ), url(), TQT_SLOT( addEntry(const TQValueList&) ) ); connect( this, TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ), url(), TQT_SIGNAL( createdDirectory(const TQUrlInfo&,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( removed(TQNetworkOperation*) ), url(), TQT_SIGNAL( removed(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( itemChanged(TQNetworkOperation*) ), url(), TQT_SIGNAL( itemChanged(TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ), url(), TQT_SIGNAL( dataTransferProgress(int,int,TQNetworkOperation*) ) ); connect( this, TQT_SIGNAL( connectionStateChanged(int,const TQString&) ), url(), TQT_SIGNAL( connectionStateChanged(int,const TQString&) ) ); } if ( !d->opInProgress && !d->operationQueue.isEmpty() ) d->opStartTimer->start( 0, TRUE ); } /*! For processing operations the network protocol base class calls this method quite often. This should be reimplemented by new network protocols. It should return TRUE if the connection is OK (open); otherwise it should return FALSE. If the connection is not open the protocol should open it. If the connection can't be opened (e.g. because you already tried but the host couldn't be found), set the state of \a op to TQNetworkProtocol::StFailed and emit the finished() signal with this TQNetworkOperation as argument. \a op is the operation that needs an open connection. */ bool TQNetworkProtocol::checkConnection( TQNetworkOperation * ) { return TRUE; } /*! Returns an int that is OR'd together using the enum values of \l{TQNetworkProtocol::Operation}, which describes which operations are supported by the network protocol. Should be reimplemented by new network protocols. */ int TQNetworkProtocol::supportedOperations() const { return 0; } /*! Adds the operation \a op to the operation queue. The operation will be processed as soon as possible. This method returns immediately. */ void TQNetworkProtocol::addOperation( TQNetworkOperation *op ) { #ifdef TQNETWORKPROTOCOL_DEBUG qDebug( "TQNetworkOperation: addOperation: %p %d", op, op->operation() ); #endif d->operationQueue.enqueue( op ); if ( !d->opInProgress ) d->opStartTimer->start( 0, TRUE ); } /*! Static method to register a network protocol for TQt. For example, if you have an implementation of NNTP (called Nntp) which is derived from TQNetworkProtocol, call: \code TQNetworkProtocol::registerNetworkProtocol( "nntp", new TQNetworkProtocolFactory ); \endcode after which your implementation is registered for future nntp operations. The name of the protocol is given in \a protocol and a pointer to the protocol factory is given in \a protocolFactory. */ void TQNetworkProtocol::registerNetworkProtocol( const TQString &protocol, TQNetworkProtocolFactoryBase *protocolFactory ) { if ( !qNetworkProtocolRegister ) { qNetworkProtocolRegister = new TQNetworkProtocolDict; TQNetworkProtocol::registerNetworkProtocol( "file", new TQNetworkProtocolFactory< TQLocalFs > ); } qNetworkProtocolRegister->insert( protocol, protocolFactory ); } /*! Static method to get a new instance of the network protocol \a protocol. For example, if you need to do some FTP operations, do the following: \code TQFtp *ftp = TQNetworkProtocol::getNetworkProtocol( "ftp" ); \endcode This returns a pointer to a new instance of an ftp implementation or null if no protocol for ftp was registered. The ownership of the pointer is transferred to you, so you must delete it if you don't need it anymore. Normally you should not work directly with network protocols, so you will not need to call this method yourself. Instead, use TQUrlOperator, which makes working with network protocols much more convenient. \sa TQUrlOperator */ TQNetworkProtocol *TQNetworkProtocol::getNetworkProtocol( const TQString &protocol ) { if ( !qNetworkProtocolRegister ) { qNetworkProtocolRegister = new TQNetworkProtocolDict; TQNetworkProtocol::registerNetworkProtocol( "file", new TQNetworkProtocolFactory< TQLocalFs > ); } if ( protocol.isNull() ) return 0; TQNetworkProtocolFactoryBase *factory = qNetworkProtocolRegister->tqfind( protocol ); if ( factory ) return factory->createObject(); return 0; } /*! Returns TRUE if the only protocol registered is for working on the local filesystem; returns FALSE if other network protocols are also registered. */ bool TQNetworkProtocol::hasOnlyLocalFileSystem() { if ( !qNetworkProtocolRegister ) return FALSE; TQDictIterator< TQNetworkProtocolFactoryBase > it( *qNetworkProtocolRegister ); for ( ; it.current(); ++it ) if ( it.currentKey() != "file" ) return FALSE; return TRUE; } /*! \internal Starts processing network operations. */ void TQNetworkProtocol::startOps() { #ifdef TQNETWORKPROTOCOL_DEBUG qDebug( "TQNetworkOperation: start processing operations" ); #endif processNextOperation( 0 ); } /*! \internal Processes the operation \a op. It calls the corresponding operation[something]( TQNetworkOperation * ) methods. */ void TQNetworkProtocol::processOperation( TQNetworkOperation *op ) { if ( !op ) return; switch ( op->operation() ) { case OpListChildren: operationListChildren( op ); break; case OpMkDir: operationMkDir( op ); break; case OpRemove: operationRemove( op ); break; case OpRename: operationRename( op ); break; case OpGet: operationGet( op ); break; case OpPut: operationPut( op ); break; } } /*! When implementing a new network protocol, this method should be reimplemented if the protocol supports listing tqchildren (files); this method should then process this TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationListChildren( TQNetworkOperation * ) { } /*! When implementing a new network protocol, this method should be reimplemented if the protocol supports making directories; this method should then process this TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationMkDir( TQNetworkOperation * ) { } /*! When implementing a new network protocol, this method should be reimplemented if the protocol supports removing tqchildren (files); this method should then process this TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which is describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationRemove( TQNetworkOperation * ) { } /*! When implementing a new newtork protocol, this method should be reimplemented if the protocol supports renaming tqchildren (files); this method should then process this TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationRename( TQNetworkOperation * ) { } /*! When implementing a new network protocol, this method should be reimplemented if the protocol supports getting data; this method should then process the TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationGet( TQNetworkOperation * ) { } /*! When implementing a new network protocol, this method should be reimplemented if the protocol supports putting (uploading) data; this method should then process the TQNetworkOperation. When you reimplement this method it's very important that you emit the correct Q_SIGNALS at the correct time (especially the finished() signal after processing an operation). Take a look at the \link network.html TQt Network Documentation\endlink which describes in detail how to reimplement this method. You may also want to look at the example implementation in examples/network/networkprotocol/nntp.cpp. \a op is the pointer to the operation object which tqcontains all the information on the operation that has finished, including the state, etc. */ void TQNetworkProtocol::operationPut( TQNetworkOperation * ) { } /*! \internal */ void TQNetworkProtocol::operationPutChunk( TQNetworkOperation * ) { } /*! \internal Handles operations. Deletes the previous operation object and tries to process the next operation. It also checks the connection state and only processes the next operation, if the connection of the protocol is open. Otherwise it waits until the protocol opens the connection. */ void TQNetworkProtocol::processNextOperation( TQNetworkOperation *old ) { #ifdef TQNETWORKPROTOCOL_DEBUG qDebug( "TQNetworkOperation: process next operation, old: %p", old ); #endif d->removeTimer->stop(); if ( old ) d->oldOps.append( old ); if ( d->opInProgress && d->opInProgress!=old ) d->oldOps.append( d->opInProgress ); if ( d->operationQueue.isEmpty() ) { d->opInProgress = 0; if ( d->autoDelete ) d->removeTimer->start( d->removeInterval, TRUE ); return; } TQNetworkOperation *op = d->operationQueue.head(); d->opInProgress = op; if ( !checkConnection( op ) ) { if ( op->state() != TQNetworkProtocol::StFailed ) { d->opStartTimer->start( 0, TRUE ); } else { d->operationQueue.dequeue(); clearOperationQueue(); emit finished( op ); } return; } d->opInProgress = op; d->operationQueue.dequeue(); processOperation( op ); } /*! Returns the TQUrlOperator on which the protocol works. */ TQUrlOperator *TQNetworkProtocol::url() const { return d->url; } /*! Returns the operation, which is being processed, or 0 of no operation is being processed at the moment. */ TQNetworkOperation *TQNetworkProtocol::operationInProgress() const { return d->opInProgress; } /*! Clears the operation queue. */ void TQNetworkProtocol::clearOperationQueue() { d->operationQueue.dequeue(); d->operationQueue.setAutoDelete( TRUE ); d->operationQueue.clear(); } /*! Stops the current operation that is being processed and clears all waiting operations. */ void TQNetworkProtocol::stop() { TQNetworkOperation *op = d->opInProgress; clearOperationQueue(); if ( op ) { op->setState( StStopped ); op->setProtocolDetail( tr( "Operation stopped by the user" ) ); emit finished( op ); setUrl( 0 ); op->free(); } } /*! Because it's sometimes hard to take care of removing network protocol instances, TQNetworkProtocol provides an auto-delete mechanism. If you set \a b to TRUE, the network protocol instance is removed after it has been inactive for \a i milliseconds (i.e. \a i milliseconds after the last operation has been processed). If you set \a b to FALSE the auto-delete mechanism is switched off. If you switch on auto-delete, the TQNetworkProtocol also deletes its TQUrlOperator. */ void TQNetworkProtocol::setAutoDelete( bool b, int i ) { d->autoDelete = b; d->removeInterval = i; } /*! Returns TRUE if auto-deleting is enabled; otherwise returns FALSE. \sa TQNetworkProtocol::setAutoDelete() */ bool TQNetworkProtocol::autoDelete() const { return d->autoDelete; } /*! \internal */ void TQNetworkProtocol::removeMe() { if ( d->autoDelete ) { #ifdef TQNETWORKPROTOCOL_DEBUG qDebug( "TQNetworkOperation: autodelete of TQNetworkProtocol %p", this ); #endif delete d->url; // destructor deletes the network protocol } } void TQNetworkProtocol::emitNewChildren( const TQUrlInfo &i, TQNetworkOperation *op ) { TQValueList lst; lst << i; emit newChildren( lst, op ); } class TQNetworkOperationPrivate { public: TQNetworkProtocol::Operation operation; TQNetworkProtocol::State state; TQMap args; TQMap rawArgs; TQString protocolDetail; int errorCode; TQTimer *deleteTimer; }; /*! \class TQNetworkOperation \brief The TQNetworkOperation class provides common operations for network protocols. \if defined(commercial) It is part of the TQt Enterprise Edition. \endif \module network \ingroup io An object is created to describe the operation and the current state for each operation that a network protocol should process. For a detailed description of the TQt Network Architecture and how to implement and use network protocols in TQt, see the \link network.html TQt Network Documentation\endlink. \sa TQNetworkProtocol */ /*! Constructs a network operation object. \a operation is the type of the operation, and \a arg0, \a arg1 and \a arg2 are the first three arguments of the operation. The state is initialized to TQNetworkProtocol::StWaiting. \sa TQNetworkProtocol::Operation TQNetworkProtocol::State */ TQNetworkOperation::TQNetworkOperation( TQNetworkProtocol::Operation operation, const TQString &arg0, const TQString &arg1, const TQString &arg2 ) { d = new TQNetworkOperationPrivate; d->deleteTimer = new TQTimer( this ); connect( d->deleteTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( deleteMe() ) ); d->operation = operation; d->state = TQNetworkProtocol::StWaiting; d->args[ 0 ] = arg0; d->args[ 1 ] = arg1; d->args[ 2 ] = arg2; d->rawArgs[ 0 ] = TQByteArray( 0 ); d->rawArgs[ 1 ] = TQByteArray( 0 ); d->rawArgs[ 2 ] = TQByteArray( 0 ); d->protocolDetail = TQString::null; d->errorCode = (int)TQNetworkProtocol::NoError; } /*! Constructs a network operation object. \a operation is the type of the operation, and \a arg0, \a arg1 and \a arg2 are the first three raw data arguments of the operation. The state is initialized to TQNetworkProtocol::StWaiting. \sa TQNetworkProtocol::Operation TQNetworkProtocol::State */ TQNetworkOperation::TQNetworkOperation( TQNetworkProtocol::Operation operation, const TQByteArray &arg0, const TQByteArray &arg1, const TQByteArray &arg2 ) { d = new TQNetworkOperationPrivate; d->deleteTimer = new TQTimer( this ); connect( d->deleteTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( deleteMe() ) ); d->operation = operation; d->state = TQNetworkProtocol::StWaiting; d->args[ 0 ] = TQString::null; d->args[ 1 ] = TQString::null; d->args[ 2 ] = TQString::null; d->rawArgs[ 0 ] = arg0; d->rawArgs[ 1 ] = arg1; d->rawArgs[ 2 ] = arg2; d->protocolDetail = TQString::null; d->errorCode = (int)TQNetworkProtocol::NoError; } /*! Destructor. */ TQNetworkOperation::~TQNetworkOperation() { delete d; } /*! Sets the \a state of the operation object. This should be done by the network protocol during processing; at the end it should be set to TQNetworkProtocol::StDone or TQNetworkProtocol::StFailed, depending on success or failure. \sa TQNetworkProtocol::State */ void TQNetworkOperation::setState( TQNetworkProtocol::State state ) { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } d->state = state; } /*! If the operation failed, the error message can be specified as \a detail. */ void TQNetworkOperation::setProtocolDetail( const TQString &detail ) { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } d->protocolDetail = detail; } /*! Sets the error code to \a ec. If the operation failed, the protocol should set an error code to describe the error in more detail. If possible, one of the error codes defined in TQNetworkProtocol should be used. \sa setProtocolDetail() TQNetworkProtocol::Error */ void TQNetworkOperation::setErrorCode( int ec ) { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } d->errorCode = ec; } /*! Sets the network operation's \a{num}-th argument to \a arg. */ void TQNetworkOperation::setArg( int num, const TQString &arg ) { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } d->args[ num ] = arg; } /*! Sets the network operation's \a{num}-th raw data argument to \a arg. */ void TQNetworkOperation::setRawArg( int num, const TQByteArray &arg ) { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } d->rawArgs[ num ] = arg; } /*! Returns the type of the operation. */ TQNetworkProtocol::Operation TQNetworkOperation::operation() const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->operation; } /*! Returns the state of the operation. You can determine whether an operation is still waiting to be processed, is being processed, has been processed successfully, or failed. */ TQNetworkProtocol::State TQNetworkOperation::state() const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->state; } /*! Returns the operation's \a{num}-th argument. If this argument was not already set, an empty string is returned. */ TQString TQNetworkOperation::arg( int num ) const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->args[ num ]; } /*! Returns the operation's \a{num}-th raw data argument. If this argument was not already set, an empty bytearray is returned. */ TQByteArray TQNetworkOperation::rawArg( int num ) const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->rawArgs[ num ]; } /*! Returns a detailed error message for the last error. This must have been set using setProtocolDetail(). */ TQString TQNetworkOperation::protocolDetail() const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->protocolDetail; } /*! Returns the error code for the last error that occurred. */ int TQNetworkOperation::errorCode() const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->errorCode; } /*! \internal */ TQByteArray& TQNetworkOperation::raw( int num ) const { if ( d->deleteTimer->isActive() ) { d->deleteTimer->stop(); d->deleteTimer->start( NETWORK_OP_DELAY ); } return d->rawArgs[ num ]; } /*! Sets this object to delete itself when it hasn't been used for one second. Because TQNetworkOperation pointers are passed around a lot the TQNetworkProtocol generally does not have enough knowledge to delete these at the correct time. If a TQNetworkProtocol doesn't need an operation any more it will call this function instead. Note: you should never need to call the method yourself. */ void TQNetworkOperation::free() { d->deleteTimer->start( NETWORK_OP_DELAY ); } /*! \internal Internal slot for auto-deletion. */ void TQNetworkOperation::deleteMe() { delete this; } #endif