OPeNDAP Hyrax Back End Server (BES)  Updated for version 3.8.3
BESDataResponseHandler.cc
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1 // BESDataResponseHandler.cc
2 
3 // This file is part of bes, A C++ back-end server implementation framework
4 // for the OPeNDAP Data Access Protocol.
5 
6 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research
7 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
8 //
9 // This library is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU Lesser General Public
11 // License as published by the Free Software Foundation; either
12 // version 2.1 of the License, or (at your option) any later version.
13 //
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // Lesser General Public License for more details.
18 //
19 // You should have received a copy of the GNU Lesser General Public
20 // License along with this library; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 //
23 // You can contact University Corporation for Atmospheric Research at
24 // 3080 Center Green Drive, Boulder, CO 80301
25 
26 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
27 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
28 //
29 // Authors:
30 // pwest Patrick West <pwest@ucar.edu>
31 // jgarcia Jose Garcia <jgarcia@ucar.edu>
32 
33 #include <cstdlib>
34 #include <cerrno>
35 #include <cstring>
36 
37 #include "BESDataResponseHandler.h"
38 #include "BESDataDDSResponse.h"
39 #include "BESRequestHandlerList.h"
40 #include "BESDapNames.h"
41 #include "BESDataNames.h"
42 //#include "BESDapTransmit.h"
43 #include "BESContextManager.h"
44 #include "BESInternalError.h"
45 #include "BESDebug.h"
46 
48  : BESResponseHandler( name )
49 {
50 }
51 
53 {
54 }
55 
71 {
73  // NOTE: It is the responsibility of the specific request handler to set
74  // the BaseTypeFactory. It is set to NULL here
75  DataDDS *dds = new DataDDS(NULL, "virtual");
76  BESDataDDSResponse *bdds = new BESDataDDSResponse(dds);
77 
78  // Set the DAP protocol version requested by the client. 2/25/11 jhrg
79 
80  dhi.first_container();
81 
82  BESDEBUG("version", "Initial CE: " << dhi.container->get_constraint() << endl);
83 
84  dhi.container->set_constraint(dds->get_keywords().parse_keywords(dhi.container->get_constraint()));
85  BESDEBUG("version", "CE after keyword processing: " << dhi.container->get_constraint() << endl);
86 
87  bool found;
88  string response_size_limit = BESContextManager::TheManager()->get_context("max_response_size", found);
89  if (found && !response_size_limit.empty()) {
90  char *endptr;
91  errno = 0;
92  long rsl = strtol(response_size_limit.c_str(), &endptr, /*int base*/ 10);
93  if (rsl == 0 && errno > 0) {
94  string err = strerror(errno);
95  delete dds; dds = 0;
96  delete bdds; bdds = 0;
97  throw BESInternalError("The responseSizeLimit context value ("
98  + response_size_limit + ") was bad: " + err, __FILE__, __LINE__);
99  }
100 
101  dds->set_response_limit(rsl); // The default for this is zero
102  }
103 
104  if (dds->get_keywords().has_keyword("dap")) {
105  dds->set_dap_version(dds->get_keywords().get_keyword_value("dap"));
106  }
107  else if (!bdds->get_dap_client_protocol().empty()) {
108  dds->set_dap_version(bdds->get_dap_client_protocol());
109  }
110 
111  _response = bdds;
113 }
114 
126 void
129 {
130  if( _response )
131  {
132  transmitter->send_response( DATA_SERVICE, _response, dhi ) ;
133  }
134 }
135 
142 void
143 BESDataResponseHandler::dump( ostream &strm ) const
144 {
145  strm << BESIndent::LMarg << "BESDataResponseHandler::dump - ("
146  << (void *)this << ")" << endl ;
148  BESResponseHandler::dump( strm ) ;
150 }
151 
154 {
155  return new BESDataResponseHandler( name ) ;
156 }
157 
string get_dap_client_protocol() const
Return the dap version string sent by the client (e.g., the OLFS)
string get_constraint() const
retrieve the constraint expression for this container
Definition: BESContainer.h:150
#define DATA_SERVICE
Definition: BESDapNames.h:70
BESDataResponseHandler(const string &name)
exception thrown if inernal error encountered
virtual string get_context(const string &name, bool &found)
retrieve the value of the specified context from the BES
static void Indent()
Definition: BESIndent.cc:38
BESResponseObject * _response
virtual void dump(ostream &strm) const
dumps information about this object
handler object that knows how to create a specific response object
virtual void send_response(const string &method, BESResponseObject *obj, BESDataHandlerInterface &dhi)
virtual void transmit(BESTransmitter *transmitter, BESDataHandlerInterface &dhi)
transmit the response object built by the execute command
static ostream & LMarg(ostream &strm)
Definition: BESIndent.cc:73
virtual void execute_each(BESDataHandlerInterface &dhi)
for each container in the given data handler interface, execute the given request ...
void set_constraint(const string &s)
set the constraint for this container
Definition: BESContainer.h:102
Represents an OPeNDAP DataDDS DAP2 data object within the BES.
virtual void dump(ostream &strm) const
dumps information about this object
static BESContextManager * TheManager()
static BESRequestHandlerList * TheList()
Structure storing information used by the BES to handle the request.
virtual void execute(BESDataHandlerInterface &dhi)
executes the command 'get data for ' by executing the request for each container in the spe...
void first_container()
set the container pointer to the first container in the containers list
#define BESDEBUG(x, y)
macro used to send debug information to the debug stream
Definition: BESDebug.h:64
static void UnIndent()
Definition: BESIndent.cc:44
#define DATA_RESPONSE_STR
Definition: BESDapNames.h:72
static BESResponseHandler * DataResponseBuilder(const string &name)
BESContainer * container
pointer to current container in this interface