+
+ if (_httpServer == "automatic" ) {
+
+ //TODO: make DN and service settable from properties
+ DNS::NAPTRRequest * naptrRequest = new DNS::NAPTRRequest("terrasync.flightgear.org");
+ naptrRequest->qservice = "ws20";
+
+ naptrRequest->qflags = "U";
+ DNS::Request_ptr r(naptrRequest);
+
+ DNS::Client dnsClient;
+ dnsClient.makeRequest(r);
+ while( !r->isComplete() && !r->isTimeout() )
+ dnsClient.update(0);
+
+ if( naptrRequest->entries.empty() ) {
+ SG_LOG(SG_TERRASYNC, SG_ALERT, "ERROR: automatic terrasync http-server requested, but no DNS entry found.");
+ _httpServer = "";
+ } else {
+ // walk through responses, they are ordered by 1. order and 2. preference
+ // For now, only take entries with lowest order
+ // TODO: try all available servers in the order given by preferenc and order
+ int order = naptrRequest->entries[0]->order;
+
+ // get all servers with this order and the same (for now only lowest preference)
+ DNS::NAPTRRequest::NAPTR_list availableServers;
+ for( DNS::NAPTRRequest::NAPTR_list::const_iterator it = naptrRequest->entries.begin();
+ it != naptrRequest->entries.end();
+ ++it ) {
+
+ if( (*it)->order != order )
+ continue;
+
+ string regex = (*it)->regexp;
+ if( false == simgear::strutils::starts_with( (*it)->regexp, "!^.*$!" ) ) {
+ SG_LOG(SG_TERRASYNC,SG_WARN, "ignoring unsupported regexp: " << (*it)->regexp );
+ continue;
+ }
+
+ if( false == simgear::strutils::ends_with( (*it)->regexp, "!" ) ) {
+ SG_LOG(SG_TERRASYNC,SG_WARN, "ignoring unsupported regexp: " << (*it)->regexp );
+ continue;
+ }
+
+ // always use first entry
+ if( availableServers.empty() || (*it)->preference == availableServers[0]->preference) {
+ SG_LOG(SG_TERRASYNC,SG_DEBUG, "available server regexp: " << (*it)->regexp );
+ availableServers.push_back( *it );
+ }
+ }
+
+ // now pick a random entry from the available servers
+ DNS::NAPTRRequest::NAPTR_list::size_type idx = sg_random() * availableServers.size();
+ _httpServer = availableServers[idx]->regexp;
+ _httpServer = _httpServer.substr( 6, _httpServer.length()-7 ); // strip search pattern and separators
+
+ SG_LOG(SG_TERRASYNC,SG_INFO, "picking entry # " << idx << ", server is " << _httpServer );
+ }
+ }
+ if( _httpServer.empty() ) { // don't resolve SVN server is HTTP server is set
+ if ( _svn_server.empty()) {
+ SG_LOG(SG_TERRASYNC,SG_INFO, "Querying closest TerraSync server");
+ ServerSelectQuery* ssq = new ServerSelectQuery;
+ HTTP::Request_ptr req = ssq;
+ _http.makeRequest(req);
+ while (!req->isComplete()) {
+ _http.update(20);
+ }
+
+ if (req->readyState() == HTTP::Request::DONE) {
+ _svn_server = ssq->svnUrl();
+ SG_LOG(SG_TERRASYNC,SG_INFO, "Closest TerraSync server:" << _svn_server);
+ } else {
+ SG_LOG(SG_TERRASYNC,SG_WARN, "Failed to query closest TerraSync server");
+ }
+ } else {
+ SG_LOG(SG_TERRASYNC,SG_INFO, "Explicit: TerraSync server:" << _svn_server);
+ }
+
+ if (_svn_server.empty()) {
+#if WE_HAVE_A_DEFAULT_SERVER_BUT_WE_DONT_THIS_URL_IS_NO_LONGER_VALID
+ // default value
+ _svn_server = "http://foxtrot.mgras.net:8080/terrascenery/trunk/data/Scenery";
+#endif
+ }
+ }
+
+ if (_use_built_in) {
+ runInternal();
+ } else {
+ runExternal();
+ }
+
+ _active = false;
+ _running = false;
+ _is_dirty = true;
+}
+
+void SGTerraSync::SvnThread::runExternal()
+{