/* Copyright 2010 Przemyslaw Czerpak <druzus / at / priv.onet.pl> */
HBNETIO is implementation of alternative RDD IO API for Harbour with
additional RPC support. It contains either client and server code.
It supports connection stream compression using ZLIB compression and
encryption using blowfish algorithm.
After registering on the client side all files used by Harbour native
RDDs with name starting with "net:" are redirected to the hbnetio server.
Client side functions:
======================
netio_Connect( [<cServer>], [<nPort>], [<nTimeOut>], ;
[<cPasswd>], [<nCompressionLevel>], [<nStrategy>] )
--> <lConnected>
Register HBNETIO as alternative RDD IO API redirecting all files
with name starting with "net:" to HBNETIO server, set default
server address, port and connection parameters and tries to set
the connection to this server.
When executed 1st time it sets default connection parameters
for all threads. Each thread can overwrite these default settings
with its own local ones calling netio_Connect() function.
Each successful call to netio_Connect() increase the reference
counter for given connection. netio_Disconnect() decrease the
reference. Connection is closed when the counter reach 0. It
means that each netio_Connect() call needs corresponding call
to netio_Disconnect(). The connections are recognized by IP server
address and port number and they are shared between threads. So when
more then one thread call netio_Connect() then only one connection
is created. It also means that netio_Disconnect() does not have to
be called by the same thread which called netio_Connect().
On application exit all connections are automatically closed.
It possible to open many different connections and keep them open.
In RDD IO operations and RPC calls it's possible to specify server
address as part of file or procedure/function name, i.e.
USE net:example.org:2942:path/to/file
netio_ProcExec( "example.org:2942:procname" )
or using UNC paths:
USE net://example.org:2942/path/to/file
netio_ProcExec( "//example.org:2942/procname" )
It's also possible to specify the password. The connection string
is in format:
<server>[:<port>[:<passwd>]]:<filepath|funcname>
or:
//<server>:<port>:<passwd>:<filepath|funcname>
or:
//<server>[:<port>]/<filepath|funcname>
Backslashes '\' are also supported and can be used instead of '/'.
Password is always terminated by ":" and whole connection string
is terminated by Chr(0) so it's not possible to use these two
characters as part of password. Anyhow when passwords are required
then it's recommended to open the connection by netio_Connect()
and then specify only server and port if server is not unique
enough to chose from existing connections. If server is not
given then default connection is chosen.
netio_GetConnection( [<cServer>], [<nPort>], [<nTimeOut>], ;
[<cPasswd>], [<nCompressionLevel>], [<nStrategy>] )
--> <pConnection> | NIL
Get pointer item with HBNETIO connection. It can be used to speedup
RPC calls and stream functions when <pConnection> is passed as
parameter to these functions.
netio_Disconnect( [<cServer>], [<nPort>] ) --> <lOK>
Close the connection created by netio_Connect()
netio_Decode( [@]<cFullName>, [@<cServer>], [@<nPort>], [@<nTimeOut>], ;
[@<cPasswd>], [@<nCompressionLevel>], [@<nStrategy>] )
--> <lDecoded>
Decode connection parameters from <cFullName> and default settings.
Return .T. if <cFullName> contains any connection settings.
<cFullName> does not need to be prefixed with "net:"
netio_TimeOut( <pConnection> [, <nTimeOut>] ) --> [<nTimeOut>]
Get/Set client side timeout for messages
netio_SetPath( <pConnection> [, <cPath>] ) --> [<cPrevPath>]
Set/Get path prefix for automatic file redirection to HBNETIO.
If automatic redirection is activated then <cPath> is removed
from file name passed to HBNETIO server, i.e.:
netio_SetPath( netio_GetConnection(), "//myserver/myshare" )
[...]
/* open "/data/table" on HBNETIO server */
use "//myserver/myshare/data/table"
netio_ProcExists( [<pConnection>,] <cProcName> ) --> <lExists>
Check if function or procedure exists on the server side.
netio_ProcExec( [<pConnection>,] <cProcName> [, <params,...>] ) --> <lSent>
Execute function or procedure on server the side do not wait for
confirmation from the server.
netio_ProcExecW( [<pConnection>,] <cProcName> [, <params,...>] )
--> <lExecuted>
Execute function or procedure on the server side and wait for
confirmation from the server.
netio_FuncExec( [<pConnection>,] <cFuncName> [, <params,...>] )
--> <xFuncRetVal>
Execute function on the server side and wait for function return
value sent by the server.
netio_OpenDataStream( [<pConnection>,] <cStreamFuncName> [, <params,...>] )
--> <nStreamID>
netio_OpenItemStream( [<pConnection>,] <cStreamFuncName> [, <params,...>] )
--> <nStreamID>
open communication stream/channel which allow to send data
asynchronously from server to client.
It executes on the server side:
<cStreamFuncName>( <pConnSock>, <nStreamID> [, <params,...>] )
and then checks value returned by above function. If it's equal to
<nStreamID> then the communication stream is opened and <nStreamID>
is returned to the client.
The function returns new stream ID or -1 if the communication stream
cannot be set.
<cStreamFuncName> may contain information about connection parameters
just like <cProcName> in NETIO_PROC*() functions.
netio_CloseStream( <nStreamID>,
[<pConnection>] | [[<cServer>], [<nPort>]] ) --> <lOK>
close communication stream/channel
netio_GetData( <nStreamID>,
[<pConnection>] | [[<cServer>], [<nPort>]] )
--> <aData> | <cData> | NIL
retrieve data sent from the server by communication stream.
If stream was open by netio_OpenDataStream() then data is returned
as string.
If stream was open by netio_OpenItemStream() then data is returned
as array of items received from the server.
Server side functions:
======================
netio_Listen( [<nPort>], [<cIfAddr>], [<cRootDir>], [<lRPC>] )
--> <pListenSocket> | NIL
netio_Accept( <pListenSocket>, [<nTimeOut>],
[<cPass>], [<nCompressionLevel>], [<nStrategy>] )
--> <pConnectionSocket> | NIL
netio_Compress( <pConnectionSocket>,
[<cPass>], [<nCompressionLevel>], [<nStrategy>] ) --> NIL
netio_VerifyClient( <pConnectionSocket> ) --> <lAccepted>
netio_Server( <pConnectionSocket> ) --> NIL
netio_ServedConnection() --> <pConnectionSocket>
netio_RPC( <pListenSocket> | <pConnectionSocket> [, <lEnable>] ) --> <lPrev>
netio_RPCFilter( <pConnectionSocket>,
<sFuncSym> | <hValue> | NIL ) --> NIL
netio_ServerStop( <pListenSocket> | <pConnectionSocket> [, <lStop>] ) --> NIL
netio_ServerTimeOut( <pConnectionSocket> [, <nTimeOut>] ) --> [<nTimeOut>]
netio_MTServer( [<nPort>], [<cIfAddr>], [<cRootDir>],
[<xRPC> | <sFuncSym> | <hValue>],
[<cPasswd>], [<nCompressionLevel>], [<nStrategy>],
[<sSrvFunc>] )
--> <pListenSocket>
netio_SrvStatus( <pConnectionSocket>
[, <nStreamID> | <nSrvInfo>, @<xData>] ) --> <nStatus>
netio_SrvSendItem( <pConnectionSocket>, <nStreamID>, <xData> ) --> <lSent>
netio_SrvSendData( <pConnectionSocket>, <nStreamID>, <cData> ) --> <lSent>
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