---

inetstl_session.h

Go to the documentation of this file.

/* 
 * File:        inetstl_session.h (formerly MIntSess.h)
 *
 * Purpose:     Contains the basic_session class.
 *
 * Created:     30th April 1999
 * Updated:     11th September 2004
 *
 * Home:        http://stlsoft.org/
 *
 * Copyright (c) 1999-2004, Matthew Wilson and Synesis Software
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
 *   any contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * 



#ifndef INETSTL_INCL_H_INETSTL_SESSION
#define INETSTL_INCL_H_INETSTL_SESSION

#ifndef __STLSOFT_DOCUMENTATION_SKIP_SECTION
# define INETSTL_VER_H_INETSTL_SESSION_MAJOR        3
# define INETSTL_VER_H_INETSTL_SESSION_MINOR        0
# define INETSTL_VER_H_INETSTL_SESSION_REVISION     1
# define INETSTL_VER_H_INETSTL_SESSION_EDIT         38
#endif /* !__STLSOFT_DOCUMENTATION_SKIP_SECTION */

/* 
 * Includes
 */

#ifndef INETSTL_INCL_H_INETSTL
# include "inetstl.h"                        // Include the InetSTL root header
#endif /* !INETSTL_INCL_H_INETSTL */
#ifndef INETSTL_INCL_H_INETSTL_FILESYSTEM_TRAITS
# include "inetstl_filesystem_traits.h"     // filesystem_traits
#endif /* !INETSTL_INCL_H_INETSTL_FILESYSTEM_TRAITS */
#ifdef __STLSOFT_CF_EXCEPTION_SUPPORT
# ifndef INETSTL_INCL_H_INETSTL_EXCEPTIONS
#  include "inetstl_exceptions.h"           // throw_internet_exception_policy
# endif /* !INETSTL_INCL_H_INETSTL_EXCEPTIONS */
#else /* ? __STLSOFT_CF_EXCEPTION_SUPPORT */
# ifndef STLSOFT_INCL_H_STLSOFT_EXCEPTIONS
#  include "stlsoft_exceptions.h"           // stlsoft::null_exception_policy
# endif /* !STLSOFT_INCL_H_STLSOFT_EXCEPTIONS */
#endif /* __STLSOFT_CF_EXCEPTION_SUPPORT */

/* 
 * Namespace
 */

#ifndef _INETSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(__STLSOFT_DOCUMENTATION_SKIP_SECTION)
/* There is no stlsoft namespace, so must define ::inetstl */
namespace inetstl
{
# else
/* Define stlsoft::inetstl_project */

namespace stlsoft
{

namespace inetstl_project
{

# endif /* _STLSOFT_NO_NAMESPACE */
#endif /* !_INETSTL_NO_NAMESPACE */

/* 




/* 
 * Classes
 */

template<   ss_typename_param_k C
#ifdef __STLSOFT_CF_EXCEPTION_SUPPORT
        ,   ss_typename_param_k X   =   throw_internet_exception_policy
#else /* ? __STLSOFT_CF_EXCEPTION_SUPPORT */
        ,   ss_typename_param_k X   =   stlsoft_ns_qual(null_exception_policy)
#endif /* __STLSOFT_CF_EXCEPTION_SUPPORT */
        ,   ss_typename_param_k T   =   filesystem_traits<C>
        >
class basic_session
{
public:
    typedef C                                                       char_type;
    typedef X                                                       exception_policy_type;
    typedef ss_typename_param_k exception_policy_type::thrown_type  thrown_type;
    typedef T                                                       traits_type;
    typedef basic_session<C, X, T>                                  class_type;

// Construction
public:
    basic_session();
    ss_explicit_k basic_session(    char_type const *pcszAgent
                                ,   is_dword_t      accessType          =   INTERNET_OPEN_TYPE_PRECONFIG
                                ,   char_type const *pcszProxyName      =   NULL
                                ,   char_type const *pcszProxyBypass    =   NULL
                                ,   is_dword_t      flags               =   0);
    ~basic_session();

// Operations
public:
    is_bool_t    open(  char_type const *pcszAgent
                    ,   is_dword_t      accessType          =   INTERNET_OPEN_TYPE_PRECONFIG
                    ,   char_type const *pcszProxyName      =   NULL
                    ,   char_type const *pcszProxyBypass    =   NULL
                    ,   is_dword_t      flags               =   0);
    void        close();
    HINTERNET   detach();

// State
public:
    is_bool_t   is_open() const;

    operator HINTERNET ();

// Implementation
private:
    static char_type const  *null_string_();

// Members
private:
    HINTERNET   m_hConn;

// Not to be implemented
private:
    basic_session(class_type const&);
    class_type &operator =(class_type const&);
};

/* 
 * Typedefs for commonly encountered types
 */

typedef basic_session<is_char_a_t>  session_a;
typedef basic_session<is_char_w_t>  session_w;
typedef basic_session<TCHAR>        session;

/* 

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline /* static */ ss_typename_type_k basic_session<C, X, T>::char_type const *basic_session<C, X, T>::null_string_()
{
    static char_type    s_null[1] = { 0 };

    return s_null;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline basic_session<C, X, T>::basic_session()
    : m_hConn(traits_type::internet_open(null_string_(), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0))
{
    if(NULL == m_hConn)
    {
        exception_policy_type()(::GetLastError());
    }
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline basic_session<C, X, T>::basic_session(   char_type const *pcszAgent
                                            ,   is_dword_t      accessType
                                            ,   char_type const *pcszProxyName
                                            ,   char_type const *pcszProxyBypass
                                            ,   is_dword_t      flags)
    : m_hConn(traits_type::internet_open(pcszAgent, accessType, pcszProxyName, pcszProxyBypass, flags))
{
    if(NULL == m_hConn)
    {
        exception_policy_type()(::GetLastError());
    }
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline basic_session<C, X, T>::~basic_session()
{
    if(m_hConn != NULL)
    {
        ::InternetCloseHandle(m_hConn);
    }
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline is_bool_t basic_session<C, X, T>::open(  char_type const *pcszAgent
                                            ,   is_dword_t      accessType
                                            ,   char_type const *pcszProxyName
                                            ,   char_type const *pcszProxyBypass
                                            ,   is_dword_t      flags)
{
    is_bool_t    bRet;

    if(is_open())
    {
        bRet = false;
    }
    else
    {
        m_hConn = traits_type::internet_open(pcszAgent, accessType, pcszProxyName, pcszProxyBypass, flags);

        if(NULL == m_hConn)
        {
            exception_policy_type()(::GetLastError());

            bRet = false;
        }
        else
        {
            bRet = true;
        }
    }

    return bRet;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline void basic_session<C, X, T>::close()
{
    if(m_hConn != NULL)
    {
        ::InternetCloseHandle(m_hConn);

        m_hConn = NULL;
    }
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline HINTERNET basic_session<C, X, T>::detach()
{
    inetstl_message_assert("Attempting to detach from an empty session", is_open());

    HINTERNET   hConn   =   m_hConn;

    m_hConn = NULL;

    return hConn;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline is_bool_t basic_session<C, X, T>::is_open() const
{
    return m_hConn != NULL;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline basic_session<C, X, T>::operator HINTERNET ()
{
    return m_hConn;
}

/* 

template<   ss_typename_param_k C
        ,   ss_typename_param_k X
        ,   ss_typename_param_k T
        >
inline HINTERNET get_handle(basic_session<C, X, T> &s)
{
    return s;
}

/* 


/* 

#ifndef _INETSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(__STLSOFT_DOCUMENTATION_SKIP_SECTION)
} // namespace inetstl
# else
} // namespace inetstl_project
} // namespace stlsoft
# endif /* _STLSOFT_NO_NAMESPACE */
#endif /* !_INETSTL_NO_NAMESPACE */

/* 

#endif /* INETSTL_INCL_H_INETSTL_SESSION */

/* 

STLSoft Libraries documentation © Synesis Software Pty Ltd, 2001-2004