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tdelibs/tdeio/tdeio/slavebase.h

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/*
Copyright (C) 2000 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 __slavebase_h
#define __slavebase_h
#include <kurl.h>
#include <tdeconfigbase.h>
#include <tdeio/global.h>
#include <tdeio/authinfo.h>
class DCOPClient;
class KRemoteEncoding;
namespace TDEIO {
class Connection;
class SlaveBasePrivate;
/**
* There are two classes that specifies the protocol between application (job)
* and tdeioslave. SlaveInterface is the class to use on the application end,
* SlaveBase is the one to use on the slave end.
*
* Slave implementations should simply inherit SlaveBase
*
* A call to foo() results in a call to slotFoo() on the other end.
*/
class TDEIO_EXPORT SlaveBase
{
public:
SlaveBase( const TQCString &protocol, const TQCString &pool_socket, const TQCString &app_socket);
virtual ~SlaveBase();
/**
* @internal
* Terminate the slave by calling the destructor and then ::exit()
*/
void exit();
/**
* @internal
*/
void dispatchLoop();
/**
* @internal
*/
void setConnection( Connection* connection ) { m_pConnection = connection; }
/**
* @internal
*/
Connection *connection() const { return m_pConnection; }
///////////
// Message Signals to send to the job
///////////
/**
* Sends data in the slave to the job (i.e. in get).
*
* To signal end of data, simply send an empty
* TQByteArray().
*
* @param data the data read by the slave
*/
void data( const TQByteArray &data );
/**
* Asks for data from the job.
* @see readData
*/
void dataReq( );
/**
* Call to signal an error.
* This also finishes the job, no need to call finished.
*
* If the Error code is TDEIO::ERR_SLAVE_DEFINED then the
* _text should contain the complete translated text of
* of the error message. This message will be displayed
* in an KTextBrowser which allows rich text complete
* with hyper links. Email links will call the default
* mailer, "exec:/command arg1 arg2" will be forked and
* all other links will call the default browser.
*
* @see TDEIO::Error
* @see KTextBrowser
* @param _errid the error code from TDEIO::Error
* @param _text the rich text error message
*/
void error( int _errid, const TQString &_text );
/**
* Call in openConnection, if you reimplement it, when you're done.
*/
void connected();
/**
* Call to signal successful completion of any command
* (besides openConnection and closeConnection)
*/
void finished();
/**
* Call to signal that data from the sub-URL is needed
*/
void needSubURLData();
/**
* Used to report the status of the slave.
* @param host the slave is currently connected to. (Should be
* empty if not connected)
* @param connected Whether an actual network connection exists.
**/
void slaveStatus(const TQString &host, bool connected);
/**
* Call this from stat() to express details about an object, the
* UDSEntry customarily contains the atoms describing file name, size,
* mimetype, etc.
* @param _entry The UDSEntry containing all of the object attributes.
*/
void statEntry( const UDSEntry& _entry );
/**
* Call this in listDir, each time you have a bunch of entries
* to report.
* @param _entry The UDSEntry containing all of the object attributes.
*/
void listEntries( const UDSEntryList& _entry );
/**
* Call this at the beginning of put(), to give the size of the existing
* partial file, if there is one. The @p offset argument notifies the
* other job (the one that gets the data) about the offset to use.
* In this case, the boolean returns whether we can indeed resume or not
* (we can't if the protocol doing the get() doesn't support setting an offset)
*/
bool canResume( TDEIO::filesize_t offset );
/*
* Call this at the beginning of get(), if the "resume" metadata was set
* and resuming is implemented by this protocol.
*/
void canResume();
///////////
// Info Signals to send to the job
///////////
/**
* Call this in get and copy, to give the total size
* of the file
* Call in listDir too, when you know the total number of items.
*/
void totalSize( TDEIO::filesize_t _bytes );
/**
* Call this during get and copy, once in a while,
* to give some info about the current state.
* Don't emit it in listDir, listEntries speaks for itself.
*/
void processedSize( TDEIO::filesize_t _bytes );
/**
* Only use this if you can't know in advance the size of the
* copied data. For example, if you're doing variable bitrate
* compression of the source.
*
* STUB ! Currently unimplemented. Here now for binary compatibility.
*
* Call this during get and copy, once in a while,
* to give some info about the current state.
* Don't emit it in listDir, listEntries speaks for itself.
*/
void processedPercent( float percent );
/**
* Call this in get and copy, to give the current transfer
* speed, but only if it can't be calculated out of the size you
* passed to processedSize (in most cases you don't want to call it)
*/
void speed( unsigned long _bytes_per_second );
/**
* Call this to signal a redirection
* The job will take care of going to that url.
*/
void redirection( const KURL &_url );
/**
* Tell that we will only get an error page here.
* This means: the data you'll get isn't the data you requested,
* but an error page (usually HTML) that describes an error.
*/
void errorPage();
/**
* Call this in mimetype() and in get(), when you know the mimetype.
* See mimetype about other ways to implement it.
*/
void mimeType( const TQString &_type );
/**
* Call to signal a warning, to be displayed in a dialog box.
*/
void warning( const TQString &msg );
/**
* Call to signal a message, to be displayed if the application wants to,
* for instance in a status bar. Usual examples are "connecting to host xyz", etc.
*/
void infoMessage( const TQString &msg );
enum MessageBoxType { QuestionYesNo = 1, WarningYesNo = 2, WarningContinueCancel = 3, WarningYesNoCancel = 4, Information = 5, SSLMessageBox = 6 };
/**
* Call this to show a message box from the slave
* @param type type of message box: QuestionYesNo, WarningYesNo, WarningContinueCancel...
* @param text Message string. May contain newlines.
* @param caption Message box title.
* @param buttonYes The text for the first button.
* The default is i18n("&Yes").
* @param buttonNo The text for the second button.
* The default is i18n("&No").
* Note: for ContinueCancel, buttonYes is the continue button and buttonNo is unused.
* and for Information, none is used.
* @return a button code, as defined in KMessageBox, or 0 on communication error.
*/
int messageBox( MessageBoxType type, const TQString &text,
const TQString &caption = TQString::null,
const TQString &buttonYes = TQString::null,
const TQString &buttonNo = TQString::null );
/**
* Call this to show a message box from the slave
* @param text Message string. May contain newlines.
* @param type type of message box: QuestionYesNo, WarningYesNo, WarningContinueCancel...
* @param caption Message box title.
* @param buttonYes The text for the first button.
* The default is i18n("&Yes").
* @param buttonNo The text for the second button.
* The default is i18n("&No").
* Note: for ContinueCancel, buttonYes is the continue button and buttonNo is unused.
* and for Information, none is used.
* @param dontAskAgainName A checkbox is added with which further confirmation can be turned off.
* The string is used to lookup and store the setting in tdeioslaverc.
* @return a button code, as defined in KMessageBox, or 0 on communication error.
* @since 3.3
*/
int messageBox( const TQString &text, MessageBoxType type,
const TQString &caption = TQString::null,
const TQString &buttonYes = TQString::null,
const TQString &buttonNo = TQString::null,
const TQString &dontAskAgainName = TQString::null );
/**
* Sets meta-data to be send to the application before the first
* data() or finished() signal.
*/
void setMetaData(const TQString &key, const TQString &value);
/**
* Queries for the existence of a certain config/meta-data entry
* send by the application to the slave.
* @since 3.2
*/
bool hasMetaData(const TQString &key) const;
/**
* Queries for config/meta-data send by the application to the slave.
* @since 3.2
*/
TQString metaData(const TQString &key) const;
/**
* @obsolete kept for binary compatibility
* Queries for the existence of a certain config/meta-data entry
* send by the application to the slave.
*/
bool hasMetaData(const TQString &key);
/**
* @obsolete kept for binary compatibility
* Queries for config/meta-data sent by the application to the slave.
*/
TQString metaData(const TQString &key);
/**
* @internal for ForwardingSlaveBase
* Contains all metadata (but no config) sent by the application to the slave.
* @since 3.5.2
*/
MetaData allMetaData() const { return mIncomingMetaData; }
/**
* Returns a configuration object to query config/meta-data information
* from.
*
* The application provides the slave with all configuration information
* relevant for the current protocol and host.
*/
TDEConfigBase* config();
/**
* Returns an object that can translate remote filenames into proper
* Unicode forms. This encoding can be set by the user.
*
* @since 3.3
*/
KRemoteEncoding* remoteEncoding();
///////////
// Commands sent by the job, the slave has to
// override what it wants to implement
///////////
/**
* Set the host
* @param host
* @param port
* @param user
* @param pass
* Called directly by createSlave, this is why there is no equivalent in
* SlaveInterface, unlike the other methods.
*
* This method is called whenever a change in host, port or user occurs.
*/
virtual void setHost(const TQString& host, int port, const TQString& user, const TQString& pass);
/**
* Prepare slave for streaming operation
*/
virtual void setSubURL(const KURL&url);
/**
* Opens the connection (forced)
* When this function gets called the slave is operating in
* connection-oriented mode.
* When a connection gets lost while the slave operates in
* connection oriented mode, the slave should report
* ERR_CONNECTION_BROKEN instead of reconnecting. The user is
* expected to disconnect the slave in the error handler.
*/
virtual void openConnection();
/**
* Closes the connection (forced)
* Called when the application disconnects the slave to close
* any open network connections.
*
* When the slave was operating in connection-oriented mode,
* it should reset itself to connectionless (default) mode.
*/
virtual void closeConnection();
/**
* get, aka read.
* @param url the full url for this request. Host, port and user of the URL
* can be assumed to be the same as in the last setHost() call.
* The slave emits the data through data
*/
virtual void get( const KURL& url );
/**
* put, i.e. write data into a file.
*
* @param url where to write the file
* @param permissions may be -1. In this case no special permission mode is set.
* @param overwrite if true, any existing file will be overwritten.
* If the file indeed already exists, the slave should NOT apply the
* permissions change to it.
* @param resume currently unused, please ignore.
* The support for resuming using .part files is done by calling canResume().
*
* IMPORTANT: Use the "modified" metadata in order to set the modification time of the file.
*
* @see canResume()
*/
virtual void put( const KURL& url, int permissions, bool overwrite, bool resume );
/**
* Finds all details for one file or directory.
* The information returned is the same as what listDir returns,
* but only for one file or directory.
*/
virtual void stat( const KURL& url );
/**
* Finds mimetype for one file or directory.
*
* This method should either emit 'mimeType' or it
* should send a block of data big enough to be able
* to determine the mimetype.
*
* If the slave doesn't reimplement it, a get will
* be issued, i.e. the whole file will be downloaded before
* determining the mimetype on it - this is obviously not a
* good thing in most cases.
*/
virtual void mimetype( const KURL& url );
/**
* Lists the contents of @p url.
* The slave should emit ERR_CANNOT_ENTER_DIRECTORY if it doesn't exist,
* if we don't have enough permissions, or if it is a file
* It should also emit totalFiles as soon as it knows how many
* files it will list.
*/
virtual void listDir( const KURL& url );
/**
* Create a directory
* @param url path to the directory to create
* @param permissions the permissions to set after creating the directory
* (-1 if no permissions to be set)
* The slave emits ERR_COULD_NOT_MKDIR if failure.
*/
virtual void mkdir( const KURL&url, int permissions );
/**
* Rename @p oldname into @p newname.
* If the slave returns an error ERR_UNSUPPORTED_ACTION, the job will
* ask for copy + del instead.
* @param src where to move the file from
* @param dest where to move the file to
* @param overwrite if true, any existing file will be overwritten
*/
virtual void rename( const KURL& src, const KURL& dest, bool overwrite );
/**
* Creates a symbolic link named @p dest, pointing to @p target, which
* may be a relative or an absolute path.
* @param target The string that will become the "target" of the link (can be relative)
* @param dest The symlink to create.
* @param overwrite whether to automatically overwrite if the dest exists
*/
virtual void symlink( const TQString& target, const KURL& dest, bool overwrite );
/**
* Change permissions on @p path
* The slave emits ERR_DOES_NOT_EXIST or ERR_CANNOT_CHMOD
*/
virtual void chmod( const KURL& url, int permissions );
/**
* Copy @p src into @p dest.
* If the slave returns an error ERR_UNSUPPORTED_ACTION, the job will
* ask for get + put instead.
* @param src where to copy the file from (decoded)
* @param dest where to copy the file to (decoded)
* @param permissions may be -1. In this case no special permission mode is set.
* @param overwrite if true, any existing file will be overwritten
*
*/
virtual void copy( const KURL &src, const KURL &dest, int permissions, bool overwrite );
/**
* Delete a file or directory.
* @param url file/directory to delete
* @param isfile if true, a file should be deleted.
* if false, a directory should be deleted.
*/
virtual void del( const KURL &url, bool isfile);
// TODO KDE4: add setLinkDest() or something, to modify symlink targets.
// Will be used for tdeio_file but also tdeio_remote (#97129)
/**
* Used for any command that is specific to this slave (protocol)
* Examples are : HTTP POST, mount and unmount (tdeio_file)
*
* @param data packed data; the meaning is completely dependent on the
* slave, but usually starts with an int for the command number.
* Document your slave's commands, at least in its header file.
*/
virtual void special( const TQByteArray & data );
/**
* Used for multiple get. Currently only used foir HTTP pielining
* support.
*
* @param data packed data; Contains number of URLs to fetch, and for
* each URL the URL itself and its associated MetaData.
*/
virtual void multiGet( const TQByteArray & data );
/**
* Called to get the status of the slave. Slave should respond
* by calling slaveStatus(...)
*/
virtual void slave_status();
/**
* Called by the scheduler to tell the slave that the configuration
* changed (i.e. proxy settings) .
*/
virtual void reparseConfiguration();
/**
* For use with for ForwardingSlaveBase
* Returns the local URL of the given remote URL if possible
* @since R14.0.0
*/
virtual void localURL( const KURL& remoteURL );
/**
* @return timeout value for connecting to remote host.
*/
int connectTimeout();
/**
* @return timeout value for connecting to proxy in secs.
*/
int proxyConnectTimeout();
/**
* @return timeout value for read from first data from
* remote host in seconds.
*/
int responseTimeout();
/**
* @return timeout value for read from subsequent data from
* remote host in secs.
*/
int readTimeout();
/**
* This function sets a timeout of @p timeout seconds and calls
* special(data) when the timeout occurs as if it was called by the
* application.
*
* A timeout can only occur when the slave is waiting for a command
* from the application.
*
* Specifying a negative timeout cancels a pending timeout.
*
* Only one timeout at a time is supported, setting a timeout
* cancels any pending timeout.
* @since 3.1
*/
void setTimeoutSpecialCommand(int timeout, const TQByteArray &data=TQByteArray());
/**
* @internal
*/
static void sigsegv_handler(int);
/**
* @internal
*/
static void sigpipe_handler(int);
/////////////////
// Dispatching (internal)
////////////////
/**
* @internal
*/
virtual bool dispatch();
/**
* @internal
*/
virtual void dispatch( int command, const TQByteArray &data );
/**
* Read data send by the job, after a dataReq
*
* @param buffer buffer where data is stored
* @return 0 on end of data,
* > 0 bytes read
* < 0 error
**/
int readData( TQByteArray &buffer );
/**
* internal function to be called by the slave.
* It collects entries and emits them via listEntries
* when enough of them are there or a certain time
* frame exceeded (to make sure the app gets some
* items in time but not too many items one by one
* as this will cause a drastic performance penalty)
* @param _entry The UDSEntry containing all of the object attributes.
* @param ready set to true after emitting all items. @p _entry is not
* used in this case
*/
void listEntry( const UDSEntry& _entry, bool ready);
/**
* internal function to connect a slave to/ disconnect from
* either the slave pool or the application
*/
void connectSlave(const TQString& path);
void disconnectSlave();
/**
* Prompt the user for Authorization info (login & password).
*
* Use this function to request authorization information from
* the end user. You can also pass an error message which explains
* why a previous authorization attempt failed. Here is a very
* simple example:
*
* \code
* TDEIO::AuthInfo authInfo;
* if ( openPassDlg( authInfo ) )
* {
* kdDebug() << TQString::fromLatin1("User: ")
* << authInfo.username << endl;
* kdDebug() << TQString::fromLatin1("Password: ")
* << TQString::fromLatin1("Not displayed here!") << endl;
* }
* \endcode
*
* You can also preset some values like the username, caption or
* comment as follows:
*
* \code
* TDEIO::AuthInfo authInfo;
* authInfo.caption= "Acme Password Dialog";
* authInfo.username= "Wile E. Coyote";
* TQString errorMsg = "You entered an incorrect password.";
* if ( openPassDlg( authInfo, errorMsg ) )
* {
* kdDebug() << TQString::fromLatin1("User: ")
* << authInfo.username << endl;
* kdDebug() << TQString::fromLatin1("Password: ")
* << TQString::fromLatin1("Not displayed here!") << endl;
* }
* \endcode
*
* \note You should consider using checkCachedAuthentication() to
* see if the password is available in kpasswdserver before calling
* this function.
*
* \note A call to this function can fail and return @p false,
* if the UIServer could not be started for whatever reason.
*
* @see checkCachedAuthentication
* @param info See AuthInfo.
* @param errorMsg Error message to show
* @return @p true if user clicks on "OK", @p false otherwsie.
* @since 3.1
*/
bool openPassDlg( TDEIO::AuthInfo& info, const TQString &errorMsg );
/**
* Same as above function except it does not need error message.
* BIC: Combine this function with the above for KDE4.
*/
bool openPassDlg( TDEIO::AuthInfo& info );
/**
* Checks for cached authentication based on parameters
* given by @p info.
*
* Use this function to check if any cached password exists
* for the URL given by @p info. If @p AuthInfo::realmValue
* and/or @p AuthInfo::verifyPath flag is specified, then
* they will also be factored in determining the presence
* of a cached password. Note that @p Auth::url is a required
* parameter when attempting to check for cached authorization
* info. Here is a simple example:
*
* \code
* AuthInfo info;
* info.url = KURL("http://www.foobar.org/foo/bar");
* info.username = "somename";
* info.verifyPath = true;
* if ( !checkCachedAuthentication( info ) )
* {
* if ( !openPassDlg(info) )
* ....
* }
* \endcode
*
* @param info See AuthInfo.
* @return @p true if cached Authorization is found, false otherwise.
*/
bool checkCachedAuthentication( AuthInfo& info );
/**
* Explicitly store authentication information. openPassDlg already
* stores password information automatically, you only need to call
* this function if you want to store authentication information that
* is different from the information returned by openPassDlg.
*/
bool cacheAuthentication( const AuthInfo& info );
/**
* @obsolete as of 3.1.
* TODO: Remove before KDE 4.0
*/
bool pingCacheDaemon() const;
/**
* @obsolete as of 3.1. Use openPassDlg instead.
* TODO: Remove before KDE 4.0
* Creates a basic key to be used to cache the password.
* @param url the url from which the key is supposed to be generated
*/
TQString createAuthCacheKey( const KURL& url );
/**
* @obsolete as of 3.1. Use openPassDlg instead.
* TODO: Remove before KDE 4.0
*
* Cache authentication information is now stored automatically
* by openPassDlg.
*/
void sendAuthenticationKey( const TQCString& gKey, const TQCString& key, bool keep );
/**
* @obsolete as of 3.1. Use openPassDlg instead.
* TODO: Remove before KDE 4.0
*
* Cached authentication information is now session based and
* removed automatically when a given session ends, i.e. the
* application is closed.
*/
void delCachedAuthentication( const TQString& key );
/**
* @obsolete as of 3.1. Use openPassDlg instead.
* TODO: Remove before KDE 4.0
*/
void setMultipleAuthCaching( bool ) {};
/**
* @obsolete as of 3.1. Use openPassDlg instead.
* TODO: Remove before KDE 4.0
*/
bool multipleAuthCaching() const { return false; }
/**
* Used by the slave to check if it can connect
* to a given host. This should be called where the slave is ready
* to do a ::connect() on a socket. For each call to
* requestNetwork must exist a matching call to
* dropNetwork, or the system will stay online until
* KNetMgr gets closed (or the SlaveBase gets destructed)!
*
* If KNetMgr is not running, then this is a no-op and returns true
*
* @param host tells the netmgr the host the slave wants to connect
* to. As this could also be a proxy, we can't just take
* the host currenctly connected to (but that's the default
* value)
*
* @return true in theorie, the host is reachable
* false the system is offline and the host is in a remote network.
*/
bool requestNetwork(const TQString& host = TQString::null);
/**
* Used by the slave to withdraw a connection requested by
* requestNetwork. This function cancels the last call to
* requestNetwork. If a client uses more than one internet
* connection, it must use dropNetwork(host) to
* stop each request.
*
* If KNetMgr is not running, then this is a no-op.
*
* @param host the host passed to requestNetwork
*
* A slave should call this function every time it disconnect from a host.
* */
void dropNetwork(const TQString& host = TQString::null);
/**
* Return the dcop client used by this slave.
* @since 3.1
*/
DCOPClient *dcopClient();
/**
* Wait for an answer to our request, until we get @p expected1 or @p expected2
* @return the result from readData, as well as the cmd in *pCmd if set, and the data in @p data
*/
int waitForAnswer( int expected1, int expected2, TQByteArray & data, int * pCmd = 0 );
/**
* Internal function to transmit meta data to the application.
*/
void sendMetaData();
/**
* Name of the protocol supported by this slave
*/
TQCString mProtocol;
Connection * m_pConnection;
MetaData mOutgoingMetaData;
MetaData mIncomingMetaData;
/** If your ioslave was killed by a signal, wasKilled() returns true.
Check it regularly in lengthy functions (e.g. in get();) and return
as fast as possible from this function if wasKilled() returns true.
This will ensure that your slave destructor will be called correctly.
@since 3.1
*/
bool wasKilled() const;
/** Internally used.
* @internal
* @since 3.1
*/
void setKillFlag();
protected:
UDSEntryList pendingListEntries;
uint listEntryCurrentSize;
long listEntry_sec, listEntry_usec;
Connection *appconn;
TQString mPoolSocket;
TQString mAppSocket;
bool mConnectedToApp;
static long s_seqNr;
virtual void virtual_hook( int id, void* data );
private:
SlaveBasePrivate *d;
};
}
#endif
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