Enable authorizer-feature in PDO_SQLITE View as Markdown

Any suggestions or meanings on it?

Thanks,
Mario

2006/11/17, Mario Wolff wolfshoehle@googlemail.com:

2006/11/16, Wez Furlong kingwez@gmail.com:

I think it would be better to pass in the pdo_dbh_t as the autharg to
the C level callback and then use that to determine if any of the
expensive work needs to be done in the callback.

Saves the sqlite_set_authorizer recall in SetAuthorizer, Looks simpler
and cleaner. -> done

static int authorizer(....)
{
pdo_dbh_t *db;

/* keep the current safemode / basedir checks "cheap" and fast */
if (existing safe_mode and open_base dir return SQLITE_DENY) {
return SQLITE_DENY;
}

db = (pdo_dbh_t*)autharg;
if (db->user_authorizer) {
TSRMLS_FETCH();

What is this? I'm not familiar with the hole php-stuff, sorry!
Done by:

•   pdo_dbh_t *dbh;
  

•   pdo_sqlite_db_handle *H;
  

...

•   dbh=(pdo_dbh_t*)autharg;
  

•   PDO_CONSTRUCT_CHECK;
  

•   H = (pdo_sqlite_db_handle *)dbh->driver_data;
  

•   if( H->user_authorizer ){
  

OK?

...

free stuff
}
}

You should take a look at how the pdo_sqlite_fci stuff works and adopt
that for the authorizer callback, as it will help improve runtime
performance there.

Can't find usefull stuff to adopt. Can you hint me further?

It would also be best to register constants for the various SQLITE_XXX codes
rather than creating strings and having the PHP code check against strings.
This will also improve performance at runtime.

I like talking parameters! But you are right, performance comes first! -> done

Short test script:
Modified:
<?php
$data = array( 'one', 'two', 'three', 'four', 'five', 'six');
$db = new PDO( 'sqlite::memory:');
echo "register authorizer\n";
$db->sqliteSetAuthorizer('auth');
$db->exec( "CREATE TABLE strings( a)");
$insert = $db->prepare( 'INSERT INTO strings VALUES ( ?)');
foreach ( $data as $str) {

  $insert->execute( array( $str));

}
$insert = null;

if( $delete = $db->prepare( 'DELETE FROM strings where a=?')){
if( $delete->execute(array( "six" ))){
echo "delete done!\n";
}
$delete = null;
}else{
echo "delete not prepared\n";
}

echo "unregister authorizer\n";
$db->sqliteSetAuthorizer();

if( $delete = $db->prepare( 'DELETE FROM strings where a=?')){
if( $delete->execute(array( "six" ))){
echo "delete done!\n";
}
$delete = null;
}else{
echo "delete not prepared\n";
}

function auth($type,$arga,$argb,$argc,$argd ){
echo "$type\t$arga\t$argb\t$argc\t$argd\n";
if( $type==SQLITE_DELETE ){
return SQLITE_DENY;
}
return SQLITE_OK;
}
print_r( $db->query( 'SELECT sqlite_version( *);')->fetchAll( ));
print_r( $db->query( 'SELECT * from strings;')->fetchAll( ));

?>

gives:
now:
register authorizer
18 sqlite_master main
2 strings main
23 sqlite_master type main
23 sqlite_master name main
23 sqlite_master tbl_name main
23 sqlite_master rootpage main
23 sqlite_master sql main
20 sqlite_master ROWID main
20 sqlite_master name main
20 sqlite_master rootpage main
20 sqlite_master sql main
20 sqlite_master tbl_name main
18 strings main
9 strings main
delete not prepared
unregister authorizer
delete done!
Array
(
[0] => Array
(
[sqlite_version( *)] => 3.3.7
[0] => 3.3.7
)

)
Array
(
[0] => Array
(
[a] => one
[0] => one
)

[1] => Array
(
[a] => two
[0] => two
)

[2] => Array
(
[a] => three
[0] => three
)

[3] => Array
(
[a] => four
[0] => four
)

[4] => Array
(
[a] => five
[0] => five
)

)

Regards,
Mario