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Some output buffering to try to decrease time and memory usage.

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git-svn-id: file:///svn/phpbb/trunk@1389 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
the_systech 2001-11-20 20:33:15 +00:00
parent 2cc2ae1eac
commit 038e717c0b
1 changed files with 56 additions and 67 deletions
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123
phpBB/admin/admin_db_utilities.php
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@ -59,6 +59,18 @@ define("VERBOSE", 0);
// -----------------------
// The following functions are adapted from phpMyAdmin and upgrade_20.php
//
function gzip_PrintFourChars($Val)
{
for ($i = 0; $i < 4; $i ++)
{
$return .= chr($Val % 256);
$Val = floor($Val / 256);
}
return $return;
}
//
// This function is used for grabbing the sequences for postgres...
//
@ -632,9 +644,9 @@ function output_table_content($content)
{
global $tempfile;
fwrite($tempfile, $content . "\n");
//fwrite($tempfile, $content . "\n");
//$backup_sql .= $content . "\n";
echo $content ."\n";
return;
}
//
@ -687,6 +699,7 @@ if( isset($HTTP_GET_VARS['perform']) || isset($HTTP_POST_VARS['perform']) )
$tables = array('auth_access', 'banlist', 'categories', 'config', 'disallow', 'forums', 'forum_prune', 'groups', 'posts', 'posts_text', 'privmsgs', 'privmsgs_text', 'ranks', 'search_results', 'search_results', 'search_wordlist', 'search_wordmatch', 'sessions', 'smilies', 'themes', 'themes_name', 'topics', 'topics_watch', 'user_group', 'users', 'vote_desc', 'vote_results', 'vote_voters', 'words');
$additional_tables = (isset($HTTP_POST_VARS['additional_tables'])) ? $HTTP_POST_VARS['additional_tables'] : ( (isset($HTTP_GET_VARS['additional_tables'])) ? $HTTP_GET_VARS['additional_tables'] : "" );
$backup_type = (isset($HTTP_POST_VARS['backup_type'])) ? $HTTP_POST_VARS['backup_type'] : ( (isset($HTTP_GET_VARS['backup_type'])) ? $HTTP_GET_VARS['backup_type'] : "" );
@ -762,65 +775,7 @@ if( isset($HTTP_GET_VARS['perform']) || isset($HTTP_POST_VARS['perform']) )
include('page_footer_admin.'.$phpEx);
}
//
// Build the sql script file...
//
$backup_sql = "#\n";
$backup_sql .= "# phpBB Backup Script\n";
$backup_sql .= "# Dump of tables for $dbname\n";
$backup_sql .= "#\n# DATE : " . gmdate("d-m-Y H:i:s", time()) . " GMT\n";
$backup_sql .= "#\n";
if(SQL_LAYER == 'postgres')
{
$backup_sql = "\n" . pg_get_sequences("\n", $backup_type);
}
//
// Ok to save on some memory we're going to try writing all this stuff
// to a tmpfile and sending it later...
//
$tempfile = tmpfile();
if(!$tempfile)
{
//
// Temp file creation failed... Do something here..
//
exit;
}
fwrite($tempfile, $backup_sql);
for($i = 0; $i < count($tables); $i++)
{
$table_name = $tables[$i];
$table_def_function = "get_table_def_" . SQL_LAYER;
$table_content_function = "get_table_content_" . SQL_LAYER;
if($backup_type != 'data')
{
fwrite($tempfile, "#\n# TABLE: " . $table_prefix . $table_name . "\n#\n");
fwrite($tempfile, $table_def_function($table_prefix . $table_name, "\n") . "\n");
}
if($backup_type != 'structure')
{
$table_content_function($table_prefix . $table_name, "output_table_content");
}
}
//
// Flush all output to the temp file and get it's size, then rewind the
// pointer to the beginning.
//
fflush($tempfile);
$temp_size = ftell($tempfile) + 1;
rewind($tempfile);
//
// move forward with sending the file across...
//
header("Pragma: no-cache");
$do_gzip_compress = FALSE;
if( $gzipcompress )
{
@ -834,24 +789,58 @@ if( isset($HTTP_GET_VARS['perform']) || isset($HTTP_POST_VARS['perform']) )
}
}
}
if($do_gzip_compress)
{
@ob_start();
@ob_implicit_flush(0);
header("Content-Type: text/x-delimtext; name=\"phpbb_db_backup.sql.gz\"");
header("Content-disposition: attachment; filename=phpbb_db_backup.sql.gz");
//echo gzencode($backup_sql);
echo gzencode(fread($tempfile, $temp_size));
}
else
{
header("Content-Type: text/x-delimtext; name=\"phpbb_db_backup.sql\"");
header("Content-disposition: attachment; filename=phpbb_db_backup.sql");
//echo $backup_sql;
echo fread($tempfile, $temp_size);
}
//
// Build the sql script file...
//
echo "#\n";
echo "# phpBB Backup Script\n";
echo "# Dump of tables for $dbname\n";
echo "#\n# DATE : " . gmdate("d-m-Y H:i:s", time()) . " GMT\n";
echo "#\n";
if(SQL_LAYER == 'postgres')
{
echo "\n" . pg_get_sequences("\n", $backup_type);
}
for($i = 0; $i < count($tables); $i++)
{
$table_name = $tables[$i];
$table_def_function = "get_table_def_" . SQL_LAYER;
$table_content_function = "get_table_content_" . SQL_LAYER;
if($backup_type != 'data')
{
echo "#\n# TABLE: " . $table_prefix . $table_name . "\n#\n";
echo $table_def_function($table_prefix . $table_name, "\n") . "\n";
}
if($backup_type != 'structure')
{
$table_content_function($table_prefix . $table_name, "output_table_content");
}
}
if($do_gzip_compress)
{
$Size = ob_get_length();
$Crc = crc32(ob_get_contents());
$contents = gzcompress(ob_get_contents());
ob_end_clean();
echo "\x1f\x8b\x08\x00\x00\x00\x00\x00".substr($contents, 0, strlen($contents) - 4).gzip_PrintFourChars($Crc).gzip_PrintFourChars($Size);
}
exit;
break;