/* This file is part of the KDE project
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __slavebase_h
#define __slavebase_h
#include <kurl.h>
#include "kio/global.h"
namespace KIO {
class Connection;
class SlaveBasePrivate;
/**
* There are two classes that specifies the protocol between application (job)
* and kioslave. 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 SlaveBase
{
public:
SlaveBase( const QCString &protocol, const QCString &pool_socket, const QCString &app_socket);
virtual ~SlaveBase();
/**
* @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
///////////
/**
* Call to send data in the slave (i.e. in get).
* @param data the data read by the slave
* Send an empty QByteArray() to signal end of data.
*/
void data( const QByteArray &data );
/**
* Call to ask for data (in put)
* @see readData
*/
void dataReq( );
/**
* Call to signal an error.
* This also finishes the job, no need to call finished.
*/
void error( int _errid, const QString &_text );
/**
* Call in openConnection, if you reimplement it, when you're done.
* Currently unused.
*/
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 QString &host, bool connected);
/**
* Call this once in stat()
*/
void statEntry( const UDSEntry& _entry );
/**
* Call this in listDir, each time you have a bunch of entries
* to report.
*/
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( unsigned long 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 @ref get and @ref copy, to give the total size
* of the file
* Call in @ref listDir too, when you know the total number of items.
*/
void totalSize( unsigned long _bytes );
/**
* Call this during @ref get and @ref copy, once in a while,
* to give some info about the current state.
* Don't emit it in @ref listDir, @ref listEntries speaks for itself.
*/
void processedSize( unsigned long _bytes );
/**
* Call this in @ref get and @ref copy, to give the current transfer
* speed. Usually worked out as processed_size / ( t - t_start )
*/
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 @ref mimetype, when you know the mimetype.
* See @ref mimetype about other ways to implement it.
*/
void mimeType( const QString &_type );
void gettingFile( const QString &_file ); // probably obsolete ?
/**
* Call to signal a warning, to be displayed in a dialog box.
*/
void warning( const QString &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 QString &msg );
enum { QuestionYesNo = 1, WarningYesNo = 2, WarningContinueCancel = 3, WarningYesNoCancel = 4, Information = 5, SSLMessageBox = 6 };
/**
* Call this to show a message box from the slave (it will in fact be handled
* by kio_uiserver, so that the progress info dialog for the slave is hidden
* while this message box is shown)
* @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( int type, const QString &text,
const QString &caption = QString::null,
const QString &buttonYes = QString::null,
const QString &buttonNo = QString::null );
/**
* Sets meta-data to be send to the application before the first
* data() or finished() signal.
*/
void setMetaData(const QString &key, const QString &value);
/**
* Queries for meta-data send by the application to the slave.
*/
QString metaData(const QString &key);
///////////
// 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 QString& host, int port, const QString& user, const QString& pass);
/**
* Prepare slave for streaming operation
*/
virtual void setSubURL(const KURL&url);
/**
* Opens the connection (forced)
* Currently unused.
*/
virtual void openConnection();
/**
* Closes the connection (forced)
* Currently unused.
*/
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 @ref data
*/
virtual void get( const KURL& url );
/**
* put, aka write.
* @param path where to write the file (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
* @param resume
*/
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 @ref 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 @ref 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 path.
* 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 @ref totalFiles as soon as it knows how many
* files it will list.
*/
virtual void listDir( const KURL& url );
/**
* Create a directory
* @param path 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 QString& 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 path 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);
/**
* Used for any command that is specific to this slave (protocol)
* Examples are : HTTP POST, mount and unmount (kio_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 QByteArray & );
/**
* 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();
/**
* @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 QByteArray &data );
/**
* Read data send by the job, after a @ref dataReq
*
* @param buffer buffer where data is stored
* @return 0 on end of data,
* > 0 bytes read
* < 0 error
**/
int readData( QByteArray &buffer );
protected:
/**
* 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 ready set to true after emitting all items. _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 QString& path);
void disconnectSlave();
/**
* Checks whether the password daemon kdesud is
* up and running or can be started if it is not.
*
* @return true if password daemon is/can be started successfully.
*/
bool pingCacheDaemon() const;
/**
* Prompts the user for Authentication info (login & password).
*
* This function attempts to prompt the user for a password
* and returns true if the user complies (clicks OK) or
* false otherwise (clicks Cancel).
*
* Exception: A call to this function can also fail, result
* in @p false, if the UIServer could not be started for some
* reason.
*
* @param msg i18n'ed message to explain the dialog box
* @param user user name, in and out
* @param pass password, in and out
* @param lockUserName flag used to enable/disable the username field.
*
* @return @p true on if successful, @p false otherwise
*/
bool openPassDlg( const QString& msg, QString& user, QString& passwd, bool lockUserName = false );
/**
* Checks for any cached Authentication.
*
* @param url url for which to check cached Authentication.
* @param user cached user name.
* @param passw cached password.
* @param realm unique key to distinguish protection spaces (ex: HTTP Realm values)
* @param extra extra info to store (ex: Authentication strings in Digest Authentication )
* @param verify_path if true, check new url contains cached url (== same protection space)
*
* @return @p true if a cached Authentication is found
*/
bool checkCachedAuthentication( const KURL& url,
QString& user,
QString& passwd,
QString& realm,
QString& extra,
bool verify_path = true );
/**
* Same as above except in the number of arguments it takes.
*
* This is a convenience method for protocols that have simple
* Authentication and do not require complex caching schemes
* such as ftp
*
* @param url url for which to check cached Authentication.
* @param user cached user name.
* @param passw cached password.
*
* @return @p true if cached Authentication if found
*/
bool checkCachedAuthentication( const KURL& url,
QString& user,
QString& passwd);
/**
* Caches Authentication information in kdesu daemon.
*
* Authentication caching is based on the following criteria:
*
* i.) The protocol as part of the key generation. This will
* reduce the chances of inadvertantly sending password to the
* incorrect server. Thus, http://www.foobar.org and
* ftp://www.foobar.org are treated as different request sites
* even if the same Authentication is assigned to the user for
* accessing both locations.
*
* ii.) Cache different servers on the the same host but with different
* port numbers. For example, one might have multiple web-based admin
* tools, such as Webmin and SWAT, on the same server with different
* port numbers.
*
* iii.) Use reference counting to keep track of all applications that are
* requesting password caching for the same location instead of storing
* duplicate enteries. The cached password can then be deleted when the
* last application referencing it is destroyed.
*
* iv.) Allow redundant password caching for the same host based on heirarchy
* such that protocols, such as HTTP, can store Authentication info
* for multiple password protected content within the same site. For example,
* http://foo.org/foo/foo.html and http://foo.org/foo/bar/bar.html would fall
* under the same protection space while http://foo.org/foobar/foo.html would
* not and hence gets a different entry. Refer to RFC 2617 for further details.
*
* @param url url for which Authentication is to be cached.
* @param user user name to be cached.
* @param passw password to be cached.
* @param realm unique key to distinguish protection spaces (ex: HTTP Realm values)
* @param extra extra info to store (ex: Authentication strings in Digest Authentication )
*
* @return @p true if Authentication was sucessfully cached
*/
bool cacheAuthentication( const KURL& url,
const QString& user,
const QString& passwd,
const QString& realm = QString::null,
const QString& extra = QString::null );
/**
* Creates a basic key to be used to cache the password.
*
* @param url URL for which a caching key should be generated.
* @return NULL if @p url is malformed, otherwise the generated key.
*/
QString createAuthCacheKey( const KURL& url );
/**
* Deletes any cached keys for the given group.
*
* @param grpname group name for which cached Authentication is to be deleted.
*/
void delCachedAuthentication( const QString& grpname );
/**
* 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 @ref
* requestNetwork must exist a matching call to
* @ref 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 QString& host = QString::null);
/**
* Used by the slave to withdraw a connection requested by
* @ref requestNetwork. This function cancels the last call to
* @ref 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 QString& host = QString::null);
/**
* 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, QByteArray & data, int * pCmd = 0 );
protected:
/**
* Name of the protocol supported by this slave
*/
QCString mProtocol;
Connection * m_pConnection;
/**
* Internal function to transmit meta data to the application.
*/
void sendMetaData();
private:
UDSEntryList pendingListEntries;
uint listEntryCurrentSize;
long listEntry_sec, listEntry_usec;
Connection *appconn;
QString mPoolSocket;
QString mAppSocket;
MetaData mOutgoingMetaData;
MetaData mIncomingMetaData;
bool mConnectedToApp;
SlaveBasePrivate *d;
};
};
#endif
| Generated by: dfaure on Tue Feb 27 12:46:56 2001, using kdoc 2.0a50. |