D4Connect.h

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// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2013 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#ifndef _d4connect_h
#define _d4connect_h
 
#include <string>
 
#define DAP4_CE_QUERY_KEY "dap4.ce"
 
namespace libdap {
 
class HTTPConnect;
class DMR;
class Response;
 
class D4Connect {
private:
    HTTPConnect *d_http;
 
    bool d_local;                 // Is this a local connection?
    std::string d_URL;            // URL to remote dataset (minus CE)
    std::string d_UrlQueryString; // CE
 
    std::string d_server;   // Server implementation information (the XDAP-Server header)
    std::string d_protocol; // DAP protocol from the server (XDAP)
 
    void process_data(DMR &data, Response &rs);
    void process_dmr(DMR &data, Response &rs);
 
    // Use when you cannot use but have a complete response with MIME headers
    void parse_mime(Response &rs);
 
    std::string build_dap4_ce(const std::string requestSuffix, const std::string expr);
 
protected:
    D4Connect();
    D4Connect(const D4Connect &);
    D4Connect &operator=(const D4Connect &);
 
public:
    D4Connect(const std::string &url, std::string uname = "", std::string password = "");
 
    virtual ~D4Connect();
 
    bool is_local() const { return d_local; }
 
    virtual std::string URL() const { return d_URL; }
    virtual std::string CE() const { return d_UrlQueryString; }
 
    void set_credentials(std::string u, std::string p);
    void set_accept_deflate(bool deflate);
    void set_xdap_protocol(int major, int minor);
 
    void set_cache_enabled(bool enabled);
    bool is_cache_enabled();
 
    void set_xdap_accept(int major, int minor);

    std::string get_version() { return d_server; }

    std::string get_protocol() { return d_protocol; }
 
    virtual void request_dmr(DMR &dmr, const std::string expr = "");
    virtual void request_dap4_data(DMR &dmr, const std::string expr = "");
#if 0
    virtual void request_version();
#endif
 
    virtual void read_dmr(DMR &dmr, Response &rs);
    virtual void read_dmr_no_mime(DMR &dmr, Response &rs);
 
    virtual void read_data(DMR &data, Response &rs);
    virtual void read_data_no_mime(DMR &data, Response &rs);
};
 
} // namespace libdap
 
#endif // _d4connect_h