2 // Property server class.
4 // Written by Curtis Olson, started September 2000.
5 // Modified by Bernie Bright, May 2002.
7 // Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
9 // This program is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU General Public License as
11 // published by the Free Software Foundation; either version 2 of the
12 // License, or (at your option) any later version.
14 // This program is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <simgear/compiler.h>
31 #include <simgear/debug/logstream.hxx>
32 #include <simgear/misc/commands.hxx>
33 #include <simgear/misc/strutils.hxx>
34 #include <simgear/misc/props.hxx>
35 #include <simgear/misc/props_io.hxx>
37 #include STL_STRSTREAM
39 #include <Main/globals.hxx>
40 #include <Main/viewmgr.hxx>
42 #include <plib/netChat.h>
46 #if !defined(SG_HAVE_NATIVE_SGI_COMPILERS)
47 SG_USING_STD(strstream);
52 * Props connection class.
53 * This class represents a connection to props client.
55 class PropsChannel : public netChat
60 * Current property node name.
77 * Append incoming data to our request buffer.
79 * @param s Character string to append to buffer
80 * @param n Number of characters to append.
82 void collectIncomingData( const char* s, int n );
85 * Process a complete request from the props client.
87 void foundTerminator();
91 * Return a "Node no found" error message to the client.
93 void node_not_found_error( const string& node_name );
99 PropsChannel::PropsChannel()
104 setTerminator( "\r\n" );
111 PropsChannel::collectIncomingData( const char* s, int n )
113 buffer.append( s, n );
120 PropsChannel::node_not_found_error( const string& node_name )
122 string error = "ERR Node \"";
124 error += "\" not found.";
125 push( error.c_str() );
126 push( getTerminator() );
129 // return a human readable form of the value "type"
131 getValueTypeString( const SGPropertyNode *node )
140 SGPropertyNode::Type type = node->getType();
141 if ( type == SGPropertyNode::UNSPECIFIED ) {
142 result = "unspecified";
143 } else if ( type == SGPropertyNode::NONE ) {
145 } else if ( type == SGPropertyNode::BOOL ) {
147 } else if ( type == SGPropertyNode::INT ) {
149 } else if ( type == SGPropertyNode::LONG ) {
151 } else if ( type == SGPropertyNode::FLOAT ) {
153 } else if ( type == SGPropertyNode::DOUBLE ) {
155 } else if ( type == SGPropertyNode::STRING ) {
167 PropsChannel::foundTerminator()
169 const char* cmd = buffer.getData();
170 SG_LOG( SG_IO, SG_INFO, "processing command = \"" << cmd << "\"" );
172 vector<string> tokens = simgear::strutils::split( cmd );
174 SGPropertyNode* node = globals->get_props()->getNode( path.c_str() );
178 string command = tokens[0];
182 SGPropertyNode* dir = node;
183 if (tokens.size() == 2)
185 if (tokens[1][0] == '/')
187 dir = globals->get_props()->getNode( tokens[1].c_str() );
194 dir = globals->get_props()->getNode( s.c_str() );
199 node_not_found_error( tokens[1] );
204 for (int i = 0; i < dir->nChildren(); i++)
206 SGPropertyNode * child = dir->getChild(i);
207 string line = child->getDisplayName(true);
209 if ( child->nChildren() > 0 )
217 string value = child->getStringValue();
218 line += " =\t'" + value + "'\t(";
219 line += getValueTypeString( child );
224 line += getTerminator();
225 push( line.c_str() );
228 else if ( command == "dump" )
231 if ( tokens.size() <= 1 )
233 writeProperties( buf, node );
234 buf << ends; // null terminate the string
236 push( getTerminator() );
240 SGPropertyNode *child = node->getNode( tokens[1].c_str() );
243 writeProperties ( buf, child );
244 buf << ends; // null terminate the string
246 push( getTerminator() );
250 node_not_found_error( tokens[1] );
254 else if ( command == "cd" )
256 if (tokens.size() == 2)
260 SGPropertyNode* child = node->getNode( tokens[1].c_str() );
264 path = node->getPath();
268 node_not_found_error( tokens[1] );
273 // Ignore attempt to move past root node with ".."
277 else if ( command == "pwd" )
279 string ttt = node->getPath();
286 push( getTerminator() );
288 else if ( command == "get" || command == "show" )
290 if ( tokens.size() == 2 )
293 string value = node->getStringValue ( tokens[1].c_str(), "" );
294 if ( mode == PROMPT )
300 tmp += getValueTypeString(
301 node->getNode( tokens[1].c_str() ) );
309 push( getTerminator() );
312 else if ( command == "set" )
314 if ( tokens.size() == 3 )
316 node->getNode( tokens[1].c_str(), true )->setStringValue(tokens[2].c_str());
318 if ( mode == PROMPT )
320 // now fetch and write out the new value as confirmation
322 string value = node->getStringValue ( tokens[1].c_str(), "" );
323 string tmp = tokens[1] + " = '" + value + "' (";
324 tmp += getValueTypeString( node->getNode( tokens[1].c_str() ) );
327 push( getTerminator() );
331 else if ( command == "run" )
333 if ( tokens.size() == 2 )
337 if ( !globals->get_commands()
338 ->execute(tokens[1].c_str(), &args) )
340 SG_LOG( SG_GENERAL, SG_ALERT,
341 "Command " << tokens[1] << " failed.");
342 if ( mode == PROMPT ) {
345 push( getTerminator() );
348 if ( mode == PROMPT ) {
349 tmp += "<completed>";
351 push( getTerminator() );
356 else if (command == "quit")
362 else if ( command == "data" )
366 else if ( command == "prompt" )
373 Valid commands are:\r\n\
375 cd <dir> cd to a directory, '..' to move back\r\n\
376 data switch to raw data mode\r\n\
377 dump dump current state (in xml)\r\n\
378 get <var> show the value of a parameter\r\n\
379 help show this help message\r\n\
380 ls [<dir>] list directory\r\n\
381 prompt switch to interactive mode (default)\r\n\
382 pwd display your current path\r\n\
383 quit terminate connection\r\n\
384 run <command> run built in command\r\n\
385 set <var> <val> set <var> to a new <val>\r\n\
386 show <var> synonym for get\r\n";
394 string prompt = node->getPath();
400 push( prompt.c_str() );
409 FGProps::FGProps( const vector<string>& tokens )
413 // props,medium,direction,hz,hostname,port#,style
414 if (tokens.size() == 2) {
415 port = atoi( tokens[1].c_str() );
416 set_hz( 5 ); // default to processing requests @ 5Hz
417 } else if (tokens.size() == 7) {
420 int hz = strtol( tokens[3].c_str(), &endptr, 10 );
422 SG_LOG( SG_IO, SG_ALERT, "I/O poll frequency out of range" );
423 set_hz( 5 ); // default to processing requests @ 5Hz
425 SG_LOG( SG_IO, SG_INFO, "Setting I/O poll frequency to "
429 port = atoi( tokens[5].c_str() );
431 throw FGProtocolConfigError( "FGProps: incorrect number of configuration arguments" );
450 SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
451 << "is already in use, ignoring" );
456 netChannel::bind( "", port );
457 netChannel::listen( 5 );
458 SG_LOG( SG_IO, SG_INFO, "Props server started on port " << port );
487 FGProps::handleAccept()
490 int handle = accept( &addr );
491 SG_LOG( SG_IO, SG_INFO, "Props server accepted connection from "
492 << addr.getHost() << ":" << addr.getPort() );
493 PropsChannel* channel = new PropsChannel();
494 channel->setHandle( handle );