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<?php
/**
* CSV import plugin for phpMyAdmin
*
* @todo add an option for handling NULL values
*/
declare(strict_types=1);
namespace PhpMyAdmin\Plugins\Import;
use PhpMyAdmin\File;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Message;
use PhpMyAdmin\Properties\Options\Items\BoolPropertyItem;
use PhpMyAdmin\Properties\Options\Items\NumberPropertyItem;
use PhpMyAdmin\Properties\Options\Items\TextPropertyItem;
use PhpMyAdmin\Util;
use function array_splice;
use function basename;
use function count;
use function is_array;
use function mb_strlen;
use function mb_strpos;
use function mb_strtolower;
use function mb_substr;
use function preg_grep;
use function preg_replace;
use function preg_split;
use function rtrim;
use function strlen;
use function strtr;
use function trim;
/**
* Handles the import for the CSV format
*/
class ImportCsv extends AbstractImportCsv
{
/**
* Whether to analyze tables
*
* @var bool
*/
private $analyze;
public function __construct()
{
parent::__construct();
$this->setProperties();
}
/**
* Sets the import plugin properties.
* Called in the constructor.
*
* @return void
*/
protected function setProperties()
{
$this->setAnalyze(false);
if ($GLOBALS['plugin_param'] !== 'table') {
$this->setAnalyze(true);
}
$generalOptions = parent::setProperties();
$this->properties->setText('CSV');
$this->properties->setExtension('csv');
if ($GLOBALS['plugin_param'] !== 'table') {
$leaf = new TextPropertyItem(
'new_tbl_name',
__(
'Name of the new table (optional):'
)
);
$generalOptions->addProperty($leaf);
if ($GLOBALS['plugin_param'] === 'server') {
$leaf = new TextPropertyItem(
'new_db_name',
__(
'Name of the new database (optional):'
)
);
$generalOptions->addProperty($leaf);
}
$leaf = new NumberPropertyItem(
'partial_import',
__(
'Import these many number of rows (optional):'
)
);
$generalOptions->addProperty($leaf);
$leaf = new BoolPropertyItem(
'col_names',
__(
'The first line of the file contains the table column names'
. ' <i>(if this is unchecked, the first line will become part'
. ' of the data)</i>'
)
);
$generalOptions->addProperty($leaf);
} else {
$leaf = new NumberPropertyItem(
'partial_import',
__(
'Import these many number of rows (optional):'
)
);
$generalOptions->addProperty($leaf);
$hint = new Message(
__(
'If the data in each row of the file is not'
. ' in the same order as in the database, list the corresponding'
. ' column names here. Column names must be separated by commas'
. ' and not enclosed in quotations.'
)
);
$leaf = new TextPropertyItem(
'columns',
__('Column names:') . ' ' . Generator::showHint($hint)
);
$generalOptions->addProperty($leaf);
}
$leaf = new BoolPropertyItem(
'ignore',
__('Do not abort on INSERT error')
);
$generalOptions->addProperty($leaf);
}
/**
* Handles the whole import logic
*
* @param array $sql_data 2-element array with sql data
*
* @return void
*/
public function doImport(?File $importHandle = null, array &$sql_data = [])
{
global $error, $message, $dbi;
global $db, $table, $csv_terminated, $csv_enclosed, $csv_escaped,
$csv_new_line, $csv_columns, $err_url;
// $csv_replace and $csv_ignore should have been here,
// but we use directly from $_POST
global $timeout_passed, $finished;
$replacements = [
'\\n' => "\n",
'\\t' => "\t",
'\\r' => "\r",
];
$csv_terminated = strtr($csv_terminated, $replacements);
$csv_enclosed = strtr($csv_enclosed, $replacements);
$csv_escaped = strtr($csv_escaped, $replacements);
$csv_new_line = strtr($csv_new_line, $replacements);
[$error, $message] = $this->buildErrorsForParams(
$csv_terminated,
$csv_enclosed,
$csv_escaped,
$csv_new_line,
(string) $err_url
);
[$sql_template, $required_fields, $fields] = $this->getSqlTemplateAndRequiredFields($db, $table, $csv_columns);
// Defaults for parser
$i = 0;
$len = 0;
$lastlen = null;
$line = 1;
$lasti = -1;
$values = [];
$csv_finish = false;
$max_lines = 0; // defaults to 0 (get all the lines)
/**
* If we get a negative value, probably someone changed min value
* attribute in DOM or there is an integer overflow, whatever be
* the case, get all the lines.
*/
if (isset($_REQUEST['csv_partial_import']) && $_REQUEST['csv_partial_import'] > 0) {
$max_lines = $_REQUEST['csv_partial_import'];
}
$max_lines_constraint = $max_lines + 1;
// if the first row has to be counted as column names, include one more row in the max lines
if (isset($_REQUEST['csv_col_names'])) {
$max_lines_constraint++;
}
$tempRow = [];
$rows = [];
$col_names = [];
$tables = [];
$buffer = '';
$col_count = 0;
$max_cols = 0;
$csv_terminated_len = mb_strlen($csv_terminated);
while (! ($finished && $i >= $len) && ! $error && ! $timeout_passed) {
$data = $this->import->getNextChunk($importHandle);
if ($data === false) {
// subtract data we didn't handle yet and stop processing
$GLOBALS['offset'] -= strlen($buffer);
break;
}
if ($data !== true) {
// Append new data to buffer
$buffer .= $data;
unset($data);
// Force a trailing new line at EOF to prevent parsing problems
if ($finished && $buffer) {
$finalch = mb_substr($buffer, -1);
if ($csv_new_line === 'auto'
&& $finalch != "\r"
&& $finalch != "\n"
) {
$buffer .= "\n";
} elseif ($csv_new_line !== 'auto'
&& $finalch != $csv_new_line
) {
$buffer .= $csv_new_line;
}
}
// Do not parse string when we're not at the end
// and don't have new line inside
if (($csv_new_line === 'auto'
&& mb_strpos($buffer, "\r") === false
&& mb_strpos($buffer, "\n") === false)
|| ($csv_new_line !== 'auto'
&& mb_strpos($buffer, $csv_new_line) === false)
) {
continue;
}
}
// Current length of our buffer
$len = mb_strlen($buffer);
// Currently parsed char
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1 && $ch == $csv_terminated[0]) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
while ($i < $len) {
// Deadlock protection
if ($lasti == $i && $lastlen == $len) {
$message = Message::error(
__('Invalid format of CSV input on line %d.')
);
$message->addParam($line);
$error = true;
break;
}
$lasti = $i;
$lastlen = $len;
// This can happen with auto EOL and \r at the end of buffer
if (! $csv_finish) {
// Grab empty field
if ($ch == $csv_terminated) {
if ($i == $len - 1) {
break;
}
$values[] = '';
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1 && $ch == $csv_terminated[0]) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
continue;
}
// Grab one field
$fallbacki = $i;
if ($ch == $csv_enclosed) {
if ($i == $len - 1) {
break;
}
$need_end = true;
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1 && $ch == $csv_terminated[0]) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
} else {
$need_end = false;
}
$fail = false;
$value = '';
while (($need_end
&& ($ch != $csv_enclosed
|| $csv_enclosed == $csv_escaped))
|| (! $need_end
&& ! ($ch == $csv_terminated
|| $ch == $csv_new_line
|| ($csv_new_line === 'auto'
&& ($ch == "\r" || $ch == "\n"))))
) {
if ($ch == $csv_escaped) {
if ($i == $len - 1) {
$fail = true;
break;
}
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1
&& $ch == $csv_terminated[0]
) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
if ($csv_enclosed == $csv_escaped
&& ($ch == $csv_terminated
|| $ch == $csv_new_line
|| ($csv_new_line === 'auto'
&& ($ch == "\r" || $ch == "\n")))
) {
break;
}
}
$value .= $ch;
if ($i == $len - 1) {
if (! $finished) {
$fail = true;
}
break;
}
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len <= 1 || $ch != $csv_terminated[0]) {
continue;
}
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
// unquoted NULL string
if ($need_end === false && $value === 'NULL') {
$value = null;
}
if ($fail) {
$i = $fallbacki;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1 && $ch == $csv_terminated[0]) {
$i += $csv_terminated_len - 1;
}
break;
}
// Need to strip trailing enclosing char?
if ($need_end && $ch == $csv_enclosed) {
if ($finished && $i == $len - 1) {
$ch = null;
} elseif ($i == $len - 1) {
$i = $fallbacki;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1
&& $ch == $csv_terminated[0]
) {
$i += $csv_terminated_len - 1;
}
break;
} else {
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1
&& $ch == $csv_terminated[0]
) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
}
}
// Are we at the end?
if ($ch == $csv_new_line
|| ($csv_new_line === 'auto' && ($ch == "\r" || $ch == "\n"))
|| ($finished && $i == $len - 1)
) {
$csv_finish = true;
}
// Go to next char
if ($ch == $csv_terminated) {
if ($i == $len - 1) {
$i = $fallbacki;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1
&& $ch == $csv_terminated[0]
) {
$i += $csv_terminated_len - 1;
}
break;
}
$i++;
$ch = mb_substr($buffer, $i, 1);
if ($csv_terminated_len > 1
&& $ch == $csv_terminated[0]
) {
$ch = $this->readCsvTerminatedString(
$buffer,
$ch,
$i,
$csv_terminated_len
);
$i += $csv_terminated_len - 1;
}
}
// If everything went okay, store value
$values[] = $value;
}
// End of line
if (! $csv_finish
&& $ch != $csv_new_line
&& ($csv_new_line !== 'auto' || ($ch != "\r" && $ch != "\n"))
) {
continue;
}
if ($csv_new_line === 'auto' && $ch == "\r") { // Handle "\r\n"
if ($i >= ($len - 2) && ! $finished) {
break; // We need more data to decide new line
}
if (mb_substr($buffer, $i + 1, 1) == "\n") {
$i++;
}
}
// We didn't parse value till the end of line, so there was
// empty one
if (! $csv_finish) {
$values[] = '';
}
if ($this->getAnalyze()) {
foreach ($values as $val) {
$tempRow[] = $val;
++$col_count;
}
if ($col_count > $max_cols) {
$max_cols = $col_count;
}
$col_count = 0;
$rows[] = $tempRow;
$tempRow = [];
} else {
// Do we have correct count of values?
if (count($values) != $required_fields) {
// Hack for excel
if ($values[count($values) - 1] !== ';') {
$message = Message::error(
__(
'Invalid column count in CSV input'
. ' on line %d.'
)
);
$message->addParam($line);
$error = true;
break;
}
unset($values[count($values) - 1]);
}
$first = true;
$sql = $sql_template;
foreach ($values as $key => $val) {
if (! $first) {
$sql .= ', ';
}
if ($val === null) {
$sql .= 'NULL';
} else {
$sql .= '\''
. $dbi->escapeString($val)
. '\'';
}
$first = false;
}
$sql .= ')';
if (isset($_POST['csv_replace'])) {
$sql .= ' ON DUPLICATE KEY UPDATE ';
foreach ($fields as $field) {
$fieldName = Util::backquote(
$field['Field']
);
$sql .= $fieldName . ' = VALUES(' . $fieldName
. '), ';
}
$sql = rtrim($sql, ', ');
}
/**
* @todo maybe we could add original line to verbose
* SQL in comment
*/
$this->import->runQuery($sql, $sql, $sql_data);
}
$line++;
$csv_finish = false;
$values = [];
$buffer = mb_substr($buffer, $i + 1);
$len = mb_strlen($buffer);
$i = 0;
$lasti = -1;
$ch = mb_substr($buffer, 0, 1);
if ($max_lines > 0 && $line == $max_lines_constraint) {
$finished = 1;
break;
}
}
if ($max_lines > 0 && $line == $max_lines_constraint) {
$finished = 1;
break;
}
}
if ($this->getAnalyze()) {
/* Fill out all rows */
$num_rows = count($rows);
for ($i = 0; $i < $num_rows; ++$i) {
for ($j = count($rows[$i]); $j < $max_cols; ++$j) {
$rows[$i][] = 'NULL';
}
}
$col_names = $this->getColumnNames($col_names, $max_cols, $rows);
$tbl_name = $this->getTableNameFromImport((string) $db);
$tables[] = [
$tbl_name,
$col_names,
$rows,
];
/* Obtain the best-fit MySQL types for each column */
$analyses = [];
$analyses[] = $this->import->analyzeTable($tables[0]);
/**
* string $db_name (no backquotes)
*
* array $table = array(table_name, array() column_names, array()() rows)
* array $tables = array of "$table"s
*
* array $analysis = array(array() column_types, array() column_sizes)
* array $analyses = array of "$analysis"s
*
* array $create = array of SQL strings
*
* array $options = an associative array of options
*/
/* Set database name to the currently selected one, if applicable,
* Otherwise, check if user provided the database name in the request,
* if not, set the default name
*/
if (isset($_REQUEST['csv_new_db_name'])
&& strlen($_REQUEST['csv_new_db_name']) > 0
) {
$newDb = $_REQUEST['csv_new_db_name'];
} else {
$result = $dbi->fetchResult('SHOW DATABASES');
if (! is_array($result)) {
$result = [];
}
$newDb = 'CSV_DB ' . (count($result) + 1);
}
[$db_name, $options] = $this->getDbnameAndOptions($db, $newDb);
/* Non-applicable parameters */
$create = null;
/* Created and execute necessary SQL statements from data */
$this->import->buildSql($db_name, $tables, $analyses, $create, $options, $sql_data);
unset($tables, $analyses);
}
// Commit any possible data in buffers
$this->import->runQuery('', '', $sql_data);
if (count($values) == 0 || $error) {
return;
}
$message = Message::error(
__('Invalid format of CSV input on line %d.')
);
$message->addParam($line);
$error = true;
}
private function buildErrorsForParams(
string $csvTerminated,
string $csvEnclosed,
string $csvEscaped,
string $csvNewLine,
string $errUrl
): array {
global $error, $message;
$param_error = false;
if (strlen($csvTerminated) === 0) {
$message = Message::error(
__('Invalid parameter for CSV import: %s')
);
$message->addParam(__('Columns terminated with'));
$error = true;
$param_error = true;
// The default dialog of MS Excel when generating a CSV produces a
// semi-colon-separated file with no chance of specifying the
// enclosing character. Thus, users who want to import this file
// tend to remove the enclosing character on the Import dialog.
// I could not find a test case where having no enclosing characters
// confuses this script.
// But the parser won't work correctly with strings so we allow just
// one character.
} elseif (mb_strlen($csvEnclosed) > 1) {
$message = Message::error(
__('Invalid parameter for CSV import: %s')
);
$message->addParam(__('Columns enclosed with'));
$error = true;
$param_error = true;
// I could not find a test case where having no escaping characters
// confuses this script.
// But the parser won't work correctly with strings so we allow just
// one character.
} elseif (mb_strlen($csvEscaped) > 1) {
$message = Message::error(
__('Invalid parameter for CSV import: %s')
);
$message->addParam(__('Columns escaped with'));
$error = true;
$param_error = true;
} elseif (mb_strlen($csvNewLine) != 1
&& $csvNewLine !== 'auto'
) {
$message = Message::error(
__('Invalid parameter for CSV import: %s')
);
$message->addParam(__('Lines terminated with'));
$error = true;
$param_error = true;
}
// If there is an error in the parameters entered,
// indicate that immediately.
if ($param_error) {
Generator::mysqlDie(
$message->getMessage(),
'',
false,
$errUrl
);
}
return [$error, $message];
}
private function getTableNameFromImport(string $databaseName): string
{
global $import_file_name, $dbi;
$importFileName = basename($import_file_name, '.csv');
$importFileName = mb_strtolower($importFileName);
$importFileName = (string) preg_replace('/[^a-zA-Z0-9_]/', '_', $importFileName);
// get new table name, if user didn't provide one, set the default name
if (isset($_REQUEST['csv_new_tbl_name'])
&& strlen($_REQUEST['csv_new_tbl_name']) > 0
) {
return $_REQUEST['csv_new_tbl_name'];
}
if (mb_strlen($databaseName)) {
$result = $dbi->fetchResult('SHOW TABLES');
// logic to get table name from filename
// if no table then use filename as table name
if (count($result) === 0) {
return $importFileName;
}
// check to see if {filename} as table exist
$nameArray = preg_grep('/' . $importFileName . '/isU', $result);
// if no use filename as table name
if (count($nameArray) === 0) {
return $importFileName;
}
// check if {filename}_ as table exist
$nameArray = preg_grep('/' . $importFileName . '_/isU', $result);
return $importFileName . '_' . (count($nameArray) + 1);
}
return $importFileName;
}
private function getColumnNames(array $columnNames, int $maxCols, array $rows): array
{
if (isset($_REQUEST['csv_col_names'])) {
$columnNames = array_splice($rows, 0, 1);
$columnNames = $columnNames[0];
// MySQL column names can't end with a space character.
foreach ($columnNames as $key => $col_name) {
$columnNames[$key] = rtrim($col_name);
}
}
if ((isset($columnNames) && count($columnNames) != $maxCols)
|| ! isset($columnNames)
) {
// Fill out column names
for ($i = 0; $i < $maxCols; ++$i) {
$columnNames[] = 'COL ' . ($i + 1);
}
}
return $columnNames;
}
private function getSqlTemplateAndRequiredFields(
?string $db,
?string $table,
?string $csvColumns
): array {
global $dbi, $error, $message;
$requiredFields = 0;
$sqlTemplate = '';
$fields = [];
if (! $this->getAnalyze() && $db !== null && $table !== null) {
$sqlTemplate = 'INSERT';
if (isset($_POST['csv_ignore'])) {
$sqlTemplate .= ' IGNORE';
}
$sqlTemplate .= ' INTO ' . Util::backquote($table);
$tmp_fields = $dbi->getColumns($db, $table);
if (empty($csvColumns)) {
$fields = $tmp_fields;
} else {
$sqlTemplate .= ' (';
$fields = [];
$tmp = preg_split('/,( ?)/', $csvColumns);
foreach ($tmp as $key => $val) {
if (count($fields) > 0) {
$sqlTemplate .= ', ';
}
/* Trim also `, if user already included backquoted fields */
$val = trim($val, " \t\r\n\0\x0B`");
$found = false;
foreach ($tmp_fields as $field) {
if ($field['Field'] == $val) {
$found = true;
break;
}
}
if (! $found) {
$message = Message::error(
__(
'Invalid column (%s) specified! Ensure that columns'
. ' names are spelled correctly, separated by commas'
. ', and not enclosed in quotes.'
)
);
$message->addParam($val);
$error = true;
break;
}
if (isset($field)) {
$fields[] = $field;
}
$sqlTemplate .= Util::backquote($val);
}
$sqlTemplate .= ') ';
}
$requiredFields = count($fields);
$sqlTemplate .= ' VALUES (';
}
return [$sqlTemplate, $requiredFields, $fields];
}
/**
* Read the expected column_separated_with String of length
* $csv_terminated_len from the $buffer
* into variable $ch and return the read string $ch
*
* @param string $buffer The original string buffer read from
* csv file
* @param string $ch Partially read "column Separated with"
* string, also used to return after
* reading length equal $csv_terminated_len
* @param int $i Current read counter of buffer string
* @param int $csv_terminated_len The length of "column separated with"
* String
*
* @return string
*/
public function readCsvTerminatedString($buffer, $ch, $i, $csv_terminated_len)
{
for ($j = 0; $j < $csv_terminated_len - 1; $j++) {
$i++;
$ch .= mb_substr($buffer, $i, 1);
}
return $ch;
}
/* ~~~~~~~~~~~~~~~~~~~~ Getters and Setters ~~~~~~~~~~~~~~~~~~~~ */
/**
* Returns true if the table should be analyzed, false otherwise
*
* @return bool
*/
private function getAnalyze()
{
return $this->analyze;
}
/**
* Sets to true if the table should be analyzed, false otherwise
*
* @param bool $analyze status
*
* @return void
*/
private function setAnalyze($analyze)
{
$this->analyze = $analyze;
}
}
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