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/usr/include/libdap/HTTPResponse.h is in libdap-dev 3.11.1-10.

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The actual contents of the file can be viewed below.

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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) 2002,2003 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.

#ifndef http_response_h
#define http_response_h

#include <cstdio>
#include <string>
#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>

using std::vector ;

#ifndef response_h
#include "Response.h"
#endif

#ifndef _debug_h
#include "debug.h"
#endif

namespace libdap
{

extern int dods_keep_temps; // defined in HTTPConnect.cc

extern void close_temp(FILE *s, const string &name);

/** Encapsulate an http response. Instead of directly returning the FILE
    pointer from which a response is read and vector of headers, return an
    instance of this object.

    @todo Maybe refactor so that the header parsing code is hear and not in
    HTTPConnect? */
class HTTPResponse : public Response
{
private:
    // TODO Make this a value, not a pointer. Fix all uses and then
    // change code in HTTPConnect
    vector<string> *d_headers; // Response headers
    string d_file;  // Temp file that holds response body

protected:
    /** @name Suppressed default methods */
    //@{
    HTTPResponse()
    {}
    HTTPResponse(const HTTPResponse &rs) : Response(rs)
    {}
    HTTPResponse &operator=(const HTTPResponse &)
    {
        throw InternalErr(__FILE__, __LINE__, "Unimplemented assignment");
    }
    //@}

public:
    /** Build an HTTPResponse object. An instance of this class is used to
    return an HTTP response (body and headers). If the response is really
    from a remote server, the current HTTP code stores the body in a
    temporary file and the headers in a vector<string> object. This class
    will delete those resources when its destructor is called. If the
    response does not have a temporary file that needs to be deleted (say
    it actually comes from a local cache or was read directly into
    memory), the temp file should be set to "".

    @param s FILE * to the response. Read the response body from this
    stream.
    @param status The HTTP response status code.
    @param h Response headers. This class will delete the pointer when
    the instance that contains it is destroyed.
    @param temp_file Name a the temporary file that holds the response
    body; this file is deleted when this instance is deleted. */
    HTTPResponse(FILE *s, int status, vector<string> *h, const string &temp_file)
            : Response(s, status), d_headers(h), d_file(temp_file)
    {
        DBG(cerr << "Headers: " << endl);
        DBGN(copy(d_headers->begin(), d_headers->end(),
                  ostream_iterator<string>(cerr, "\n")));
        DBGN(cerr << "end of headers." << endl);
    }

    /** When an instance is destroyed, free the temporary resources: the
    temp_file and headers are deleted. If the tmp file name is "", it is
    not deleted. */
    virtual ~HTTPResponse()
    {
        DBG(cerr << "Freeing HTTPConnect resources (" + d_file + ")... ");

        if (!dods_keep_temps && !d_file.empty()) {
            close_temp(get_stream(), d_file);
            set_stream(0);
        }

        delete d_headers; d_headers = 0;

        DBGN(cerr << endl);
    }
    /** @name Accessors */
    //@{
    virtual vector<string> *get_headers() const
    {
        return d_headers;
    }
    virtual string get_file() const
    {
        return d_file;
    }
    //@}

    /** @name Mutators */
    //@{
    virtual void set_headers(vector<string> *h)
    {
        d_headers = h;
    }

    virtual void set_file(const string &n)
    {
	d_file = n;
    }
    //@}
};

} // namespace libdap

#endif // http_response_h