/* $Id: netaccess_h.html 84528 2001-02-27 00:42:21Z dfaure $
This file is part of the KDE libraries
Copyright (C) 1997 Torben Weis (weis@kde.org)
Copyright (C) 1998 Matthias Ettrich (ettrich@kde.org)
Copyright (C) 1999 David Faure (faure@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __kio_netaccess_h
#define __kio_netaccess_h
#include <qobject.h>
#include <qstring.h>
#include <qstringlist.h>
#include <kurl.h>
#include <kio/global.h>
namespace KIO {
class Job;
/**
* Net Transparency, formerly provided by kfmlib, but now
* done with @ref KIO::Jobs.
*
* This class isn't meant to be used as a class but only as a simple
* namespace for static functions, though an instance of the class
* is built for internal purposes. Whereas a @p kiojob is
* asynchronous, meaning that the developer has to connect slots
* for it, @p KIO::NetAccess provides synchronous downloads and
* uploads, as well as temporary file creation and removal.
*
* Port to kio done by David Faure, faure@kde.org
*
* @short Provides a synchronous interface to io jobs.
*/
class NetAccess : public QObject
{
Q_OBJECT
public:
/**
* Download a file from an arbitrary URL (@p src) to a
* temporary file on the local filesystem (@p target).
*
* If the argument
* for @p target is an empty string, download will generate a
* unique temporary filename in /tmp. Since @p target is a reference
* to @ref QString you can access this filename easily. Download will
* return @p true if the download was successful, otherwise @p false.
*
* Special case:
* If the URL is of kind @p file: then no downloading is
* processed but the full filename is returned in @p target.
* That means you @em have to take care about the @p target argument.
* (This is very easy to do, please see the example below.)
*
* Download is synchronous. That means you can use it like
* this, (assuming @p u is a string which represents a URL and your
* application has a @ref loadFile() function):
*
* <pre>
* QString tmpFile;
* if( KIO::NetAccess::download( u, tmpFile ) )
* {
* loadFile( tmpFile );
* KIO::NetAccess::removeTempFile( tmpFile );
* }
* </pre>
*
* Of course, your user interface will still process exposure/repaint
* events during the download.
*
* @param src URL Reference to the file to download.
*
* @param target String containing the final local location of the
* file. If you insert an empty string, it will
* return a location in a temporary spot.
*/
static bool download(const KURL& src, QString & target);
/**
* Remove the specified file if and only if it was created
* by @ref KIO::NetAccess as a temporary file for a former download.
*
* Note: This means that if you created your temporary with @ref KTempFile,
* use @ref KTempFile::unlink() or @ref KTempFile::setAutoDelete() to have
* it removed.
*
* @param name Path to temporary file to remove. May not be
* empty.
*/
static void removeTempFile(const QString& name);
/**
* Upload file @p src to URL @p target.
*
* Both must be specified, unlike @ref download.
* Note that this is assumed to be used for saving a file over
* the network, so overwriting is set to true. This is not the
* case with @ref copy.
*
* @param src URL Referencing the file to upload.
*
* @param target URL containing the final location of the
* file.
*/
static bool upload(const QString& src, const KURL& target);
/**
* Alternative method for copying over the network.
* Overwrite is false, so this will fail if @p target exists.
*
* This one takes two URLs and is a direct equivalent
* of @ref KIO::file_copy (not KIO::copy!).
*/
static bool copy( const KURL& src, const KURL& target );
/**
* Alternative method for copying over the network.
* Overwrite is false, so this will fail if @p target exists.
*
* This one takes two URLs and is a direct equivalent
* of @ref KIO::copy!.
*/
static bool dircopy( const KURL& src, const KURL& target );
/**
* Test whether a URL exists.
*
* This is a convenience function for @ref KIO::stat
* (it saves creating a slot and testing for the job result).
*
* @param url the url we are testing
*/
static bool exists(const KURL& url);
/**
* Test whether a URL exists and return information on it.
*
* This is a convenience function for @ref KIO::stat
* (it saves creating a slot and testing for the job result).
*
* @param url The URL we are testing.
* @param entry The result of the stat. Iterate over the list
* of atoms to get hold of name, type, size, etc., or use @ref KFileItem.
*/
static bool stat(const KURL& url, KIO::UDSEntry & entry);
/**
* Delete a file or a directory in an synchronous way.
*
* This is a convenience function for @ref KIO::del
* (it saves creating a slot and testing for the job result).
*
* @param url The file or directory to delete.
* @return @p true on success, @p false on failure.
*/
static bool del( const KURL & url );
/**
* Create a directory in an synchronous way.
*
* This is a convenience function for @p KIO::mkdir
* (it saves creating a slot and testing for the job result).
*
* @param url The directory to create.
* @return @p true on success, @p false on failure.
*/
static bool mkdir( const KURL & url, int permissions = -1 );
/**
* Determine the mimetype of a given URL.
*
* This is a convenience function for @ref KIO::mimetype. You
* should call this only when really necessary. @ref
* KMimeType::findByURL can determine extension a lot faster, but
* less reliably for remote files. Only when @ref findByURL() returns
* unknown (application/octet-stream) then this one should be
* used.
*
* @param url The URL whose mimetype we are interested in.
* @return The mimetype name.
*/
static QString mimetype( const KURL & url );
/**
* Return error string for the last job, in case it failed
*/
static QString lastErrorString() { return lastErrorMsg ? *lastErrorMsg : QString::null; }
private:
/** Private constructor */
NetAccess() {}
/** Private destructor */
~NetAccess() {}
/** Internal methods */
bool copyInternal(const KURL& src, const KURL& target, bool overwrite);
bool dircopyInternal(const KURL& src, const KURL& target, bool overwrite);
bool statInternal(const KURL & url);
UDSEntry m_entry;
bool delInternal(const KURL & url);
bool mkdirInternal(const KURL & url, int permissions);
QString mimetypeInternal(const KURL & url);
void enter_loop();
QString m_mimetype;
/** List of temporary files */
static QStringList* tmpfiles;
static QString* lastErrorMsg;
/** Whether the download succeeded or not */
bool bJobOK;
friend class I_like_this_class;
private slots:
void slotResult( KIO::Job * job );
void slotMimetype( KIO::Job * job, const QString & type );
};
};
#endif
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