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tdelibs/tdeio/tdeio/netaccess.h

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/*
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) 1999-2004 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __tdeio_netaccess_h
#define __tdeio_netaccess_h
#include <tqobject.h>
#include <tqstring.h>
#include <tdeio/global.h>
class TQStringList;
class TQWidget;
class KURL;
template<typename T, typename K> class TQMap;
namespace TDEIO {
class Job;
/**
* Net Transparency.
*
* NetAccess allows you to do simple file operation (load, save,
* copy, delete...) without working with TDEIO::Job directly.
* Whereas a TDEIO::Job is asynchronous, meaning that the
* developer has to connect slots for it, TDEIO::NetAccess provides
* synchronous downloads and uploads, as well as temporary file
* creation and removal. The functions appear to be blocking,
* but the Qt event loop continues running while the operations
* are handled. This means that the GUI will not freeze.
*
* 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.
*
* Port to tdeio done by David Faure, faure@kde.org
*
* @short Provides an easy, synchronous interface to TDEIO file operations.
*/
class TDEIO_EXPORT NetAccess : public TQObject
{
Q_OBJECT
public:
/**
* Downloads 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 TQString you can access this filename easily. Download will
* return true if the download was successful, otherwise false.
*
* Special case:
* If the URL is of kind 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 loadFile() function):
*
* \code
* TQString tmpFile;
* if( TDEIO::NetAccess::download( u, tmpFile, window ) )
* {
* loadFile( tmpFile );
* TDEIO::NetAccess::removeTempFile( tmpFile );
* } else {
* KMessageBox::error(this, TDEIO::NetAccess::lastErrorString() );
* }
* \endcode
*
* Of course, your user interface will still process exposure/repaint
* events during the download.
*
* If the download fails, lastError() and lastErrorString() will be set.
*
* @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. <B>Note:</B>
* you are responsible for the removal of this file when
* you are finished reading it using removeTempFile.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return true if successful, false for failure. Use lastErrorString() to
* get the reason it failed.
*
* @see lastErrorString()
* @since 3.2
*/
static bool download(const KURL& src, TQString & target, TQWidget* window);
/**
* @deprecated. Use the function above instead.
*/
static bool download(const KURL& src, TQString & target) KDE_DEPRECATED;
/**
* Removes the specified file if and only if it was created
* by TDEIO::NetAccess as a temporary file for a former download.
*
* Note: This means that if you created your temporary with KTempFile,
* use KTempFile::unlink() or KTempFile::setAutoDelete() to have
* it removed.
*
* @param name Path to temporary file to remove. May not be
* empty.
*/
static void removeTempFile(const TQString& name);
/**
* Uploads file @p src to URL @p target.
*
* Both must be specified, unlike 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 copy.
*
* @param src URL Referencing the file to upload.
* @param target URL containing the final location of the file.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be cached
* only for a short duration after which the user will again be
* prompted for passwords as needed.
*
* @return true if successful, false for failure
* @since 3.2
*/
static bool upload(const TQString& src, const KURL& target, TQWidget* window);
/**
* @deprecated. Use the function above instead.
*/
static bool upload(const TQString& src, const KURL& target) KDE_DEPRECATED;
/**
* Alternative to upload 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 TDEIO::file_copy (not TDEIO::copy!).
* It will be renamed file_copy in KDE4, so better use file_copy.
*
* @param src URL Referencing the file to upload.
* @param target URL containing the final location of the file.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be cached
* only for a short duration after which the user will again be
* prompted for passwords as needed.
*
* @return true if successful, false for failure
*/
static bool copy( const KURL& src, const KURL& target, TQWidget* window );
// KDE4: rename to file_copy
/**
* @deprecated. Use the function above instead.
*/
static bool copy( const KURL& src, const KURL& target ) KDE_DEPRECATED;
// KDE4: merge with above
/**
* Full-fledged equivalent of TDEIO::file_copy
*/
static bool file_copy( const KURL& src, const KURL& dest, int permissions=-1,
bool overwrite=false, bool resume=false, TQWidget* window = 0L );
/**
* Full-fledged equivalent of TDEIO::file_move.
* Moves or renames *one file*.
* @since 3.2
*/
static bool file_move( const KURL& src, const KURL& target, int permissions=-1,
bool overwrite=false, bool resume=false, TQWidget* window = 0L );
/**
* 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 TDEIO::copy!.
* This means that it can copy files and directories alike
* (it should have been named copy()).
*
* @param src URL Referencing the file to upload.
* @param target URL containing the final location of the
* file.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be cached
* only for a short duration after which the user will again be
* prompted for passwords as needed.
* @return true if successful, false for failure
*/
static bool dircopy( const KURL& src, const KURL& target, TQWidget* window );
/**
* @deprecated. Use the function above instead.
*/
static bool dircopy( const KURL& src, const KURL& target ) KDE_DEPRECATED; // KDE4: merge
/**
* Overloaded method, which takes a list of source URLs
*/
static bool dircopy( const KURL::List& src, const KURL& target, TQWidget* window = 0L );
/**
* Full-fledged equivalent of TDEIO::move.
* Moves or renames one file or directory.
* @since 3.2
*/
static bool move( const KURL& src, const KURL& target, TQWidget* window = 0L );
/**
* Full-fledged equivalent of TDEIO::move.
* Moves or renames a list of files or directories.
* @since 3.2
*/
static bool move( const KURL::List& src, const KURL& target, TQWidget* window = 0L );
/**
* Returns the output of the localURL TDEIO job.
*
* @param url the URL we are testing
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return the local URL for the given URL
* @since R14
*/
static KURL localURL(const KURL& url, TQWidget* window);
/**
* Tests whether a URL exists.
*
* @param url the URL we are testing
* @param source if true, we want to read from that URL.
* If false, we want to write to it.
* IMPORTANT: see documentation for TDEIO::stat for more details about this.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return true if the URL exists and we can do the operation specified by
* @p source, false otherwise
* @since 3.2
*/
static bool exists(const KURL& url, bool source, TQWidget* window);
/**
* @deprecated. Use the function above instead.
* @since 3.2
*/
static bool exists(const KURL& url, TQWidget* window) KDE_DEPRECATED;
/**
* @deprecated. Use the function above instead.
*/
static bool exists(const KURL& url) KDE_DEPRECATED;
/**
* @deprecated. Use the function above instead.
*/
static bool exists(const KURL& url, bool source) KDE_DEPRECATED; // KDE4: merge
/**
* Tests whether a URL exists and return information on it.
*
* This is a convenience function for TDEIO::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 KFileItem.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return true if successful, false for failure
*/
static bool stat(const KURL& url, TDEIO::UDSEntry & entry, TQWidget* window);
/**
* @deprecated. Use the function above instead.
*/
static bool stat(const KURL& url, TDEIO::UDSEntry & entry) KDE_DEPRECATED;
/**
* Tries to map a local URL for the given URL.
*
* This is a convenience function for TDEIO::stat + parsing the
* resulting UDSEntry.
*
* @param url The URL we are testing.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return a local URL corresponding to the same ressource than the
* original URL, or the original URL if no local URL can be mapped
* @since 3.5
*/
static KURL mostLocalURL(const KURL& url, TQWidget* window);
/**
* Deletes a file or a directory in a synchronous way.
*
* This is a convenience function for TDEIO::del
* (it saves creating a slot and testing for the job result).
*
* @param url The file or directory to delete.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return true on success, false on failure.
*/
static bool del( const KURL & url, TQWidget* window );
/**
* @deprecated. Use the function above instead. Passing NULL as the
* additional argument will give the same behaviour, but
* you should try to identify a suitable parent widget
* if at all possible.
*/
static bool del( const KURL & url ) KDE_DEPRECATED;
/**
* Creates a directory in a synchronous way.
*
* This is a convenience function for @p TDEIO::mkdir
* (it saves creating a slot and testing for the job result).
*
* @param url The directory to create.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @param permissions directory permissions.
* @return true on success, false on failure.
*/
static bool mkdir( const KURL & url, TQWidget* window, int permissions = -1 );
/**
* @deprecated. Use the function above instead. Passing NULL as the
* additional argument will give the same behaviour, but
* you should try to identify a suitable parent widget
* if at all possible.
*/
static bool mkdir( const KURL & url, int permissions = -1 ) KDE_DEPRECATED;
/**
* Executes a remote process via the fish ioslave in a synchronous way.
*
* @param url The remote machine where the command should be executed.
* e.g. fish://someuser\@somehost:sshport/
* some special cases exist.
* fish://someuser\@localhost/
* will use su instead of ssh to connect and execute the command.
* fish://someuser\@localhost:port/
* will use ssh to connect and execute the command.
* @param command The command to be executed.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return The resulting output of the @p command that is executed.
*/
static TQString fish_execute( const KURL & url, const TQString command, TQWidget* window );
/**
* This function executes a job in a synchronous way.
* If a job fetches some data, pass a TQByteArray pointer as data parameter to this function
* and after the function returns it will contain all the data fetched by this job.
*
* <code>
* TDEIO::Job *job = TDEIO::get( url, false, false );
* TQMap<TQString, TQString> metaData;
* metaData.insert( "PropagateHttpHeader", "true" );
* if ( NetAccess::synchronousRun( job, 0, &data, &url, &metaData ) ) {
* TQString responseHeaders = metaData[ "HTTP-Headers" ];
* kdDebug()<<"Response header = "<< responseHeaders << endl;
* }
* </code>
*
* @param job job which the function will run. Note that after this function
* finishes running, job is deleted and you can't access it anymore!
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @param data if passed and relevant to this job then it will contain the data
* that was fetched by the job
* @param finalURL if passed will contain the final url of this job (it might differ
* from the one it was created with if there was a redirection)
* @param metaData you can pass a pointer to the map with meta data you wish to
* set on the job. After the job finishes this map will hold all the
* meta data from the job.
*
* @return true on success, false on failure.
*
* @since 3.4
*/
static bool synchronousRun( Job* job, TQWidget* window, TQByteArray* data=0,
KURL* finalURL=0, TQMap<TQString,TQString>* metaData=0 );
/**
* @internal
* This function is not implemented!?
* (only mimetypeInternal)
*
* Determines the mimetype of a given URL.
*
* This is a convenience function for TDEIO::mimetype. You
* should call this only when really necessary.
* KMimeType::findByURL can determine extension a lot faster, but
* less reliably for remote files. Only when findByURL() returns
* unknown (application/octet-stream) then this one should be
* used.
*
* @param url The URL whose mimetype we are interested in.
* @param window main window associated with this job. This is used to
* automatically cache and discard authentication information
* as needed. If NULL, authentication information will be
* cached only for a short duration after which the user will
* again be prompted for passwords as needed.
* @return The mimetype name.
*/
static TQString mimetype( const KURL & url, TQWidget* window );
/**
* @deprecated. Use the function above instead. Passing NULL as the
* additional argument will give the same behaviour, but
* you should try to identify a suitable parent widget
* if at all possible.
*/
static TQString mimetype( const KURL & url ) KDE_DEPRECATED;
/**
* Returns the error string for the last job, in case it failed.
* Note that this is already translated.
* @return the last error string, or TQString::null
*/
static TQString lastErrorString() { return lastErrorMsg ? *lastErrorMsg : TQString::null; }
/**
* Returns the error code for the last job, in case it failed.
* @return the last error code
* @since 3.3
*/
static int lastError() { return lastErrorCode; }
private:
/**
* Private constructor
*/
NetAccess() : m_metaData(0), d(0) {}
/**
* Private destructor
*/
~NetAccess() {}
/**
* Internal methods
*/
bool filecopyInternal(const KURL& src, const KURL& target, int permissions,
bool overwrite, bool resume, TQWidget* window, bool move);
bool dircopyInternal(const KURL::List& src, const KURL& target,
TQWidget* window, bool move);
bool statInternal(const KURL & url, int details, bool source, TQWidget* window = 0);
KURL localURLInternal( const KURL & url, TQWidget* window = 0);
bool delInternal(const KURL & url, TQWidget* window = 0);
bool mkdirInternal(const KURL & url, int permissions, TQWidget* window = 0);
TQString fish_executeInternal(const KURL & url, const TQString command, TQWidget* window = 0);
bool synchronousRunInternal( Job* job, TQWidget* window, TQByteArray* data,
KURL* finalURL, TQMap<TQString,TQString>* metaData );
TQString mimetypeInternal(const KURL & url, TQWidget* window = 0);
void enter_loop();
/**
* List of temporary files
*/
static TQStringList* tmpfiles;
static TQString* lastErrorMsg;
static int lastErrorCode;
friend class I_like_this_class;
private slots:
void slotResult( TDEIO::Job * job );
void slotMimetype( TDEIO::Job * job, const TQString & type );
void slotLocalURL(TDEIO::Job*, const KURL&, bool);
void slotData( TDEIO::Job*, const TQByteArray& );
void slotRedirection( TDEIO::Job*, const KURL& );
private:
UDSEntry m_entry;
TQString m_mimetype;
KURL m_localURL;
TQByteArray m_data;
KURL m_url;
TQMap<TQString, TQString> *m_metaData;
/**
* Whether the download succeeded or not
*/
bool bJobOK;
private:
class NetAccessPrivate* d; // not really needed, the ctor is private already.
};
}
#endif