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<?php
/* $Id: import.lib.php 9528 2006-10-10 13:04:24Z nijel $ */
// vim: expandtab sw=4 ts=4 sts=4:
/* Library that provides common import functions that are used by import plugins */
// We need to know something about user
require_once('./libraries/check_user_privileges.lib.php');
// We do this check
define('PMA_CHK_DROP', 1);
/**
* Check whether timeout is getting close
*
* @return boolean true if timeout is close
* @access public
*/
function PMA_checkTimeout()
{
global $timestamp, $maximum_time, $timeout_passed;
if ($maximum_time == 0) {
return FALSE;
} elseif ($timeout_passed) {
return TRUE;
/* 5 in next row might be too much */
} elseif ((time() - $timestamp) > ($maximum_time - 5)) {
$timeout_passed = TRUE;
return TRUE;
} else {
return FALSE;
}
}
/**
* Detects what compression filse uses
*
* @param string filename to check
* @return string MIME type of compression, none for none
* @access public
*/
function PMA_detectCompression($filepath)
{
$file = @fopen($filepath, 'rb');
if (!$file) {
return FALSE;
}
$test = fread($file, 4);
$len = strlen($test);
fclose($file);
if ($len >= 2 && $test[0] == chr(31) && $test[1] == chr(139)) {
return 'application/gzip';
}
if ($len >= 3 && substr($test, 0, 3) == 'BZh') {
return 'application/bzip2';
}
if ($len >= 4 && $test == "PK\003\004") {
return 'application/zip';
}
return 'none';
}
/**
* Runs query inside import buffer. This is needed to allow displaying
* of last SELECT, SHOW or HANDLER results and similar nice stuff.
*
* @param string query to run
* @param string query to display, this might be commented
* @access public
*/
function PMA_importRunQuery($sql = '', $full = '')
{
global $import_run_buffer, $go_sql, $complete_query, $display_query, $sql_query, $cfg, $my_die, $error, $reload, $finished, $timeout_passed, $skip_queries, $executed_queries, $max_sql_len, $read_multiply, $cfg, $sql_query_disabled, $db, $run_query, $is_superuser, $message, $show_error_header;
$read_multiply = 1;
if (isset($import_run_buffer)) {
// Should we skip something?
if ($skip_queries > 0) {
$skip_queries--;
} else {
if (!empty($import_run_buffer['sql']) && trim($import_run_buffer['sql']) != '') {
$max_sql_len = max($max_sql_len, strlen($import_run_buffer['sql']));
if (!$sql_query_disabled) {
$sql_query .= $import_run_buffer['full'];
}
if (!$cfg['AllowUserDropDatabase']
&& !$is_superuser
&& preg_match('@^[[:space:]]*DROP[[:space:]]+(IF EXISTS[[:space:]]+)?DATABASE @i', $import_run_buffer['sql'])) {
$message = $GLOBALS['strNoDropDatabases'];
$show_error_header = TRUE;
$error = TRUE;
} else {
$executed_queries++;
if ($run_query && $finished && empty($sql) && !$error && (
(!empty($import_run_buffer['sql']) && preg_match('/^[\s]*(SELECT|SHOW|HANDLER)/i', $import_run_buffer['sql'])) ||
($executed_queries == 1)
)) {
$go_sql = TRUE;
if (!$sql_query_disabled) {
$complete_query = $sql_query;
$display_query = $sql_query;
} else {
$complete_query = '';
$display_query = '';
}
$sql_query = $import_run_buffer['sql'];
} elseif ($run_query) {
$result = PMA_DBI_try_query($import_run_buffer['sql']);
$msg = '# ';
if ($result === FALSE) { // execution failed
if (!isset($my_die)) {
$my_die = array();
}
$my_die[] = array('sql' => $import_run_buffer['full'], 'error' => PMA_DBI_getError());
if ($cfg['VerboseMultiSubmit']) {
$msg .= $GLOBALS['strError'];
}
if (!$cfg['IgnoreMultiSubmitErrors']) {
$error = TRUE;
return;
}
} elseif ($cfg['VerboseMultiSubmit']) {
$a_num_rows = (int)@PMA_DBI_num_rows($result);
$a_aff_rows = (int)@PMA_DBI_affected_rows();
if ($a_num_rows > 0) {
$msg .= $GLOBALS['strRows'] . ': ' . $a_num_rows;
} elseif ($a_aff_rows > 0) {
$a_rows =
$msg .= $GLOBALS['strAffectedRows'] . ' ' . $a_aff_rows;
} else {
$msg .= $GLOBALS['strEmptyResultSet'];
}
}
if (!$sql_query_disabled) {
$sql_query .= $msg . "\n";
}
// If a 'USE <db>' SQL-clause was found and the query succeeded, set our current $db to the new one
if ($result != FALSE && preg_match('@^[\s]*USE[[:space:]]*([\S]+)@i', $import_run_buffer['sql'], $match)) {
$db = trim($match[1]);
$db = trim($db,';'); // for example, USE abc;
$reload = TRUE;
}
if ($result != FALSE && preg_match('@^[\s]*(DROP|CREATE)[\s]+(IF EXISTS[[:space:]]+)?(TABLE|DATABASE)[[:space:]]+(.+)@im', $import_run_buffer['sql'])) {
$reload = TRUE;
}
} // end run query
} // end if not DROP DATABASE
} // end non empty query
elseif (!empty($import_run_buffer['full'])) {
if ($go_sql) {
$complete_query .= $import_run_buffer['full'];
$display_query .= $import_run_buffer['full'];
} else {
if (!$sql_query_disabled) {
$sql_query .= $import_run_buffer['full'];
}
}
}
// check length of query unless we decided to pass it to sql.php
if (!$go_sql) {
if ($cfg['VerboseMultiSubmit'] && !empty($sql_query)) {
if (strlen($sql_query) > 50000 || $executed_queries > 50 || $max_sql_len > 1000) {
$sql_query = '';
$sql_query_disabled = TRUE;
}
} else {
if (strlen($sql_query) > 10000 || $executed_queries > 10 || $max_sql_len > 500) {
$sql_query = '';
$sql_query_disabled = TRUE;
}
}
}
} // end do query (no skip)
} // end buffer exists
// Do we have something to push into buffer?
if (!empty($sql) || !empty($full)) {
$import_run_buffer = array('sql' => $sql, 'full' => $full);
} else {
unset($GLOBALS['import_run_buffer']);
}
}
/**
* Returns next part of imported file/buffer
*
* @param integer size of buffer to read (this is maximal size
* function will return)
* @return string part of file/buffer
* @access public
*/
function PMA_importGetNextChunk($size = 32768)
{
global $import_file, $import_text, $finished, $compression, $import_handle, $offset, $charset_conversion, $charset_of_file, $charset, $read_multiply, $read_limit;
// Add some progression while reading large amount of data
if ($read_multiply <= 8) {
$size *= $read_multiply;
} else {
$size *= 8;
}
$read_multiply++;
// We can not read too much
if ($size > $read_limit) {
$size = $read_limit;
}
if (PMA_checkTimeout()) {
return FALSE;
}
if ($finished) {
return TRUE;
}
if ($import_file == 'none') {
// Well this is not yet supported and tested, but should return content of textarea
if (strlen($import_text) < $size) {
$finished = TRUE;
return $import_text;
} else {
$r = substr($import_text, 0, $size);
$offset += $size;
$import_text = substr($import_text, $size);
return $r;
}
}
switch ($compression) {
case 'application/bzip2':
$result = bzread($import_handle, $size);
$finished = feof($import_handle);
break;
case 'application/gzip':
$result = gzread($import_handle, $size);
$finished = feof($import_handle);
break;
case 'application/zip':
$result = substr($import_text, 0, $size);
$import_text = substr($import_text, $size);
$finished = empty($import_text);
break;
case 'none':
$result = fread($import_handle, $size);
$finished = feof($import_handle);
break;
}
$offset += $size;
if ($charset_conversion) {
return PMA_convert_string($charset_of_file, $charset, $result);
} else {
// Skip possible byte order marks (I do not think we need more
// charsets, but feel free to add more, you can use wikipedia for
// reference: <http://en.wikipedia.org/wiki/Byte_Order_Mark>)
// @TODO: BOM could be used for charset autodetection
if ($offset == $size) {
// UTF-8
if (strncmp($result, "\xEF\xBB\xBF", 3) == 0) {
$result = substr($result, 3);
// UTF-16 BE, LE
} elseif (strncmp($result, "\xFE\xFF", 2) == 0 || strncmp($result, "\xFF\xFE", 2) == 0) {
$result = substr($result, 2);
}
}
return $result;
}
}
?>
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