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search for installed drivers in win

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This commit is contained in:
Jenny Tam 2017-09-22 16:37:05 -07:00
parent 695254c29b
commit 6fc50c100c
1 changed files with 40 additions and 32 deletions
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72
source/shared/core_conn.cpp
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@ -156,7 +156,7 @@ sqlsrv_conn* core_sqlsrv_connect( _In_ sqlsrv_context& henv_cp, _In_ sqlsrv_cont
r = core_odbc_connect( conn, conn_str, is_missing_driver, is_pooled );
}
else if ( conn->ce_option.enabled ) {
#ifndef _WIN32
// #ifndef _WIN32
if( core_search_odbc_driver( DRIVER_VERSION::ODBC_DRIVER_17 ) ) {
conn_str = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION::ODBC_DRIVER_17 ];
r = core_odbc_connect( conn, conn_str, is_missing_driver, is_pooled );
@ -167,21 +167,23 @@ sqlsrv_conn* core_sqlsrv_connect( _In_ sqlsrv_context& henv_cp, _In_ sqlsrv_cont
throw core::CoreException();
}
}
#else
conn_str = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION::ODBC_DRIVER_17 ];
r = core_odbc_connect( conn, conn_str, is_missing_driver, is_pooled );
// #else
// conn_str = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION::ODBC_DRIVER_17 ];
// r = core_odbc_connect( conn, conn_str, is_missing_driver, is_pooled );
CHECK_CUSTOM_ERROR( is_missing_driver, conn, SQLSRV_ERROR_AE_DRIVER_NOT_INSTALLED, get_processor_arch()) {
throw core::CoreException();
}
#endif // !_WIN32
// CHECK_CUSTOM_ERROR( is_missing_driver, conn, SQLSRV_ERROR_AE_DRIVER_NOT_INSTALLED, get_processor_arch()) {
// throw core::CoreException();
// }
// #endif // !_WIN32
}
else {
#ifndef _WIN32
// #ifndef _WIN32
is_missing_driver = true;
for ( std::size_t i = DRIVER_VERSION::FIRST; i <= DRIVER_VERSION::LAST; ++i ) {
#ifndef _WIN32
if (i == DRIVER_VERSION::ODBC_DRIVER_11) // skip ODBC 11 in non-Windows environment
continue;
#endif // !_WIN32
if( core_search_odbc_driver( i ) ) {
std::string conn_str_driver = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION( i ) ];
@ -193,19 +195,19 @@ sqlsrv_conn* core_sqlsrv_connect( _In_ sqlsrv_context& henv_cp, _In_ sqlsrv_cont
CHECK_CUSTOM_ERROR( is_missing_driver, conn, SQLSRV_ERROR_DRIVER_NOT_INSTALLED, get_processor_arch()) {
throw core::CoreException();
}
#else
for ( std::size_t i = DRIVER_VERSION::FIRST; i <= DRIVER_VERSION::LAST; ++i ) {
is_missing_driver = false;
std::string conn_str_driver = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION(i) ];
r = core_odbc_connect( conn, conn_str_driver, is_missing_driver, is_pooled );
CHECK_CUSTOM_ERROR( is_missing_driver && ( i == DRIVER_VERSION::LAST ), conn, SQLSRV_ERROR_DRIVER_NOT_INSTALLED, get_processor_arch()) {
throw core::CoreException();
}
if ( !is_missing_driver) {
break;
}
} // for
#endif // !_WIN32
// #else
// for ( std::size_t i = DRIVER_VERSION::FIRST; i <= DRIVER_VERSION::LAST; ++i ) {
// is_missing_driver = false;
// std::string conn_str_driver = conn_str + CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION(i) ];
// r = core_odbc_connect( conn, conn_str_driver, is_missing_driver, is_pooled );
// CHECK_CUSTOM_ERROR( is_missing_driver && ( i == DRIVER_VERSION::LAST ), conn, SQLSRV_ERROR_DRIVER_NOT_INSTALLED, get_processor_arch()) {
// throw core::CoreException();
// }
// if ( !is_missing_driver) {
// break;
// }
// } // for
// #endif // !_WIN32
} // else ce_option enabled
CHECK_SQL_ERROR( r, conn ) {
@ -263,16 +265,23 @@ sqlsrv_conn* core_sqlsrv_connect( _In_ sqlsrv_context& henv_cp, _In_ sqlsrv_cont
return return_conn;
}
// core_search_odbc_driver
// This method is meant to be used in a non-Windows environment,
// searching for a particular ODBC driver name in the odbcinst.ini file
// Parameters:
// driver_version - a valid value in enum DRIVER_VERSION
// Return - a boolean flag that indicates if the specified driver version is found or not
bool core_search_odbc_driver( _In_ std::size_t driver_version )
{
char szBuf[2001];
WORD cbBufMax = 2000;
char szBuf[DEFAULT_CONN_STR_LEN+1]; // use an arbitrary large enough buffer size
WORD cbBufMax = DEFAULT_CONN_STR_LEN;
WORD cbBufOut;
char *pszBuf = szBuf;
bool found_driver = false;
#ifndef _WIN32
// Get the names of the installed drivers
//#ifndef _WIN32
// get all the names of the installed drivers delimited by null characters
if(! SQLGetInstalledDrivers( szBuf, cbBufMax, &cbBufOut ) )
{
return false;
@ -284,25 +293,24 @@ bool core_search_odbc_driver( _In_ std::size_t driver_version )
std::size_t pos2 = driver.find_first_of("}");
std::string driver_str = driver.substr( pos1 + 1, pos2 - pos1 - 1);
// search for the ODBC driver...
const char* driver_name = driver_str.c_str();
//const char* driver_str = CONNECTION_STRING_DRIVER_NAME[ DRIVER_VERSION(driver_version) ].c_str();
// Search for the ODBC driver...
do
{
if( strstr( pszBuf, driver_name ) != 0 )
{
// Found !
found_driver = true;
break;
}
// get the next driver
pszBuf = strchr( pszBuf, '\0' ) + 1;
}
while( pszBuf[1] != '\0' );
#endif // !_WIN32
while( pszBuf[1] != '\0' ); // end when there are two consecutive null characters
//#endif // !_WIN32
return found_driver;
}
// core_odbc_connect
// calls odbc connect API to establish the connection to server
// Parameters: