OPeNDAP Hyrax Back End Server (BES)  Updated for version 3.8.3
BESDataDDXResponseHandler.cc
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00001 // BESDataDDXResponseHandler.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 //
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 //
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025 
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include "BESDataDDXResponseHandler.h"
00034 #include "BESDataDDSResponse.h"
00035 #include "BESRequestHandlerList.h"
00036 #include "BESDapNames.h"
00037 #include "BESDataNames.h"
00038 #include "BESDapTransmit.h"
00039 
00040 #include "BESDebug.h"
00041 
00042 BESDataDDXResponseHandler::BESDataDDXResponseHandler( const string &name )
00043     : BESResponseHandler( name )
00044 {
00045 }
00046 
00047 BESDataDDXResponseHandler::~BESDataDDXResponseHandler( )
00048 {
00049 }
00050 
00065 void
00066 BESDataDDXResponseHandler::execute( BESDataHandlerInterface &dhi )
00067 {
00068     BESDEBUG( "dap", "Entering BESDataDDXResponseHandler::execute" << endl ) ;
00069 
00070     dhi.action_name = DATADDX_RESPONSE_STR ;
00071     // Create the DDS.
00072     // NOTE: It is the responsibility of the specific request handler to set
00073     // the BaseTypeFactory. It is set to NULL here
00074     DataDDS *dds = new DataDDS( NULL, "virtual" ) ;
00075     BESDataDDSResponse *bdds = new BESDataDDSResponse( dds ) ;
00076     _response = bdds ;
00077 
00078     // we're actually going to get the data response, it just gets
00079     // displayed as a DataDDX
00080     _response_name = DATA_RESPONSE ;
00081     dhi.action = DATA_RESPONSE ;
00082 
00083     // Read keywords from the CE and use those to set the DAP version; maybe
00084     // other things. If the dap version(s) are not included in the CE using
00085     // keywords, then see if anything was sent in the Request headers (which
00086     // the OLFS will parse); the BES includes that info in the BESDapResponse
00087     // object.
00088 
00089     // Set the DAP protocol version requested by the client. 2/25/11 jhrg
00090 
00091     dhi.first_container();
00092     BESDEBUG("version", "Initial CE: " << dhi.container->get_constraint() << endl);
00093     dhi.container->set_constraint(dds->get_keywords().parse_keywords(dhi.container->get_constraint()));
00094     BESDEBUG("version", "CE after keyword processing: " << dhi.container->get_constraint() << endl);
00095 
00096     dhi.data[POST_CONSTRAINT] = dds->get_keywords().parse_keywords(dhi.data[POST_CONSTRAINT]);
00097     if (dds->get_keywords().has_keyword("dap")) {
00098         dds->set_dap_version(dds->get_keywords().get_keyword_value("dap"));
00099     }
00100     else if (!bdds->get_dap_client_protocol().empty()) {
00101         dds->set_dap_version( bdds->get_dap_client_protocol() ) ;
00102     }
00103 
00104     dds->set_request_xml_base( bdds->get_request_xml_base() );
00105 
00106     BESRequestHandlerList::TheList()->execute_each( dhi ) ;
00107 
00108     // we've got what we want, now set the action back to data ddx
00109     dhi.action = DATADDX_RESPONSE ;
00110     _response = bdds ;
00111 
00112     BESDEBUG( "dap", "Leaving BESDataDDXResponseHandler::execute" << endl ) ;
00113 }
00114 
00127 void
00128 BESDataDDXResponseHandler::transmit( BESTransmitter * transmitter,
00129                                      BESDataHandlerInterface & dhi )
00130 {
00131     if( _response )
00132     {
00133         transmitter->send_response( DATADDX_SERVICE, _response, dhi ) ;
00134     }
00135 }
00136 
00143 void
00144 BESDataDDXResponseHandler::dump( ostream &strm ) const
00145 {
00146     strm << BESIndent::LMarg << "BESDataDDXResponseHandler::dump - ("
00147                              << (void *)this << ")" << endl ;
00148     BESIndent::Indent() ;
00149     BESResponseHandler::dump( strm ) ;
00150     BESIndent::UnIndent() ;
00151 }
00152 
00153 BESResponseHandler *
00154 BESDataDDXResponseHandler::DataDDXResponseBuilder( const string &name )
00155 {
00156     return new BESDataDDXResponseHandler( name ) ;
00157 }
00158