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Code Editor : File.php
<?php declare(strict_types=1); namespace PhpMyAdmin; use ZipArchive; use const UPLOAD_ERR_CANT_WRITE; use const UPLOAD_ERR_EXTENSION; use const UPLOAD_ERR_FORM_SIZE; use const UPLOAD_ERR_INI_SIZE; use const UPLOAD_ERR_NO_FILE; use const UPLOAD_ERR_NO_TMP_DIR; use const UPLOAD_ERR_OK; use const UPLOAD_ERR_PARTIAL; use function basename; use function bin2hex; use function bzopen; use function bzread; use function extension_loaded; use function fclose; use function feof; use function file_get_contents; use function filesize; use function fopen; use function fread; use function function_exists; use function gzopen; use function gzread; use function is_link; use function is_readable; use function is_string; use function is_uploaded_file; use function mb_strcut; use function move_uploaded_file; use function ob_end_clean; use function ob_start; use function sprintf; use function strlen; use function tempnam; use function trim; use function unlink; /** * File wrapper class * * @todo when uploading a file into a blob field, should we also consider using * chunks like in import? UPDATE `table` SET `field` = `field` + [chunk] */ class File { /** * @var string the temporary file name * @access protected */ protected $name = null; /** * @var string the content * @access protected */ protected $content = null; /** * @var Message|null the error message * @access protected */ protected $errorMessage = null; /** * @var bool whether the file is temporary or not * @access protected */ protected $isTemp = false; /** * @var string type of compression * @access protected */ protected $compression = null; /** @var int */ protected $offset = 0; /** @var int size of chunk to read with every step */ protected $chunkSize = 32768; /** @var resource|null file handle */ protected $handle = null; /** @var bool whether to decompress content before returning */ protected $decompress = false; /** @var string charset of file */ protected $charset = null; /** @var ZipExtension */ private $zipExtension; /** * @param bool|string $name file name or false * * @access public */ public function __construct($name = false) { if ($name && is_string($name)) { $this->setName($name); } if (! extension_loaded('zip')) { return; } $this->zipExtension = new ZipExtension(new ZipArchive()); } /** * destructor * * @see File::cleanUp() * * @access public */ public function __destruct() { $this->cleanUp(); } /** * deletes file if it is temporary, usually from a moved upload file * * @return bool success * * @access public */ public function cleanUp(): bool { if ($this->isTemp()) { return $this->delete(); } return true; } /** * deletes the file * * @return bool success * * @access public */ public function delete(): bool { return unlink((string) $this->getName()); } /** * checks or sets the temp flag for this file * file objects with temp flags are deleted with object destruction * * @param bool $is_temp sets the temp flag * * @return bool File::$_is_temp * * @access public */ public function isTemp(?bool $is_temp = null): bool { if ($is_temp !== null) { $this->isTemp = $is_temp; } return $this->isTemp; } /** * accessor * * @param string|null $name file name * * @access public */ public function setName(?string $name): void { $this->name = trim((string) $name); } /** * Gets file content * * @return string|false|null the binary file content, or false if no content * * @access public */ public function getRawContent() { if ($this->content !== null) { return $this->content; } if ($this->isUploaded() && ! $this->checkUploadedFile()) { return false; } if (! $this->isReadable()) { return false; } if (function_exists('file_get_contents')) { $this->content = file_get_contents((string) $this->getName()); return $this->content; } $size = filesize((string) $this->getName()); if ($size) { $handle = fopen((string) $this->getName(), 'rb'); $this->content = fread($handle, $size); fclose($handle); } return $this->content; } /** * Gets file content * * @return string|false the binary file content as a string, * or false if no content * * @access public */ public function getContent() { $result = $this->getRawContent(); if ($result === false || $result === null) { return false; } return '0x' . bin2hex($result); } /** * Whether file is uploaded. * * @access public */ public function isUploaded(): bool { if ($this->getName() === null) { return false; } return is_uploaded_file($this->getName()); } /** * accessor * * @return string|null File::$_name * * @access public */ public function getName(): ?string { return $this->name; } /** * Initializes object from uploaded file. * * @param string $name name of file uploaded * * @return bool success * * @access public */ public function setUploadedFile(string $name): bool { $this->setName($name); if (! $this->isUploaded()) { $this->setName(null); $this->errorMessage = Message::error(__('File was not an uploaded file.')); return false; } return true; } /** * Loads uploaded file from table change request. * * @param string $key the md5 hash of the column name * @param string $rownumber number of row to process * * @return bool success * * @access public */ public function setUploadedFromTblChangeRequest( string $key, string $rownumber ): bool { if (! isset($_FILES['fields_upload']) || empty($_FILES['fields_upload']['name']['multi_edit'][$rownumber][$key]) ) { return false; } $file = $this->fetchUploadedFromTblChangeRequestMultiple( $_FILES['fields_upload'], $rownumber, $key ); switch ($file['error']) { case UPLOAD_ERR_OK: return $this->setUploadedFile($file['tmp_name']); case UPLOAD_ERR_NO_FILE: break; case UPLOAD_ERR_INI_SIZE: $this->errorMessage = Message::error(__( 'The uploaded file exceeds the upload_max_filesize directive in ' . 'php.ini.' )); break; case UPLOAD_ERR_FORM_SIZE: $this->errorMessage = Message::error(__( 'The uploaded file exceeds the MAX_FILE_SIZE directive that was ' . 'specified in the HTML form.' )); break; case UPLOAD_ERR_PARTIAL: $this->errorMessage = Message::error(__( 'The uploaded file was only partially uploaded.' )); break; case UPLOAD_ERR_NO_TMP_DIR: $this->errorMessage = Message::error(__('Missing a temporary folder.')); break; case UPLOAD_ERR_CANT_WRITE: $this->errorMessage = Message::error(__('Failed to write file to disk.')); break; case UPLOAD_ERR_EXTENSION: $this->errorMessage = Message::error(__('File upload stopped by extension.')); break; default: $this->errorMessage = Message::error(__('Unknown error in file upload.')); } return false; } /** * strips some dimension from the multi-dimensional array from $_FILES * * <code> * $file['name']['multi_edit'][$rownumber][$key] = [value] * $file['type']['multi_edit'][$rownumber][$key] = [value] * $file['size']['multi_edit'][$rownumber][$key] = [value] * $file['tmp_name']['multi_edit'][$rownumber][$key] = [value] * $file['error']['multi_edit'][$rownumber][$key] = [value] * * // becomes: * * $file['name'] = [value] * $file['type'] = [value] * $file['size'] = [value] * $file['tmp_name'] = [value] * $file['error'] = [value] * </code> * * @param array $file the array * @param string $rownumber number of row to process * @param string $key key to process * * @return array * * @access public * @static */ public function fetchUploadedFromTblChangeRequestMultiple( array $file, string $rownumber, string $key ): array { return [ 'name' => $file['name']['multi_edit'][$rownumber][$key], 'type' => $file['type']['multi_edit'][$rownumber][$key], 'size' => $file['size']['multi_edit'][$rownumber][$key], 'tmp_name' => $file['tmp_name']['multi_edit'][$rownumber][$key], 'error' => $file['error']['multi_edit'][$rownumber][$key], ]; } /** * sets the name if the file to the one selected in the tbl_change form * * @param string $key the md5 hash of the column name * @param string $rownumber number of row to process * * @return bool success * * @access public */ public function setSelectedFromTblChangeRequest( string $key, ?string $rownumber = null ): bool { if (! empty($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key]) && is_string($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key]) ) { // ... whether with multiple rows ... return $this->setLocalSelectedFile( $_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key] ); } return false; } /** * Returns possible error message. * * @return Message|null error message * * @access public */ public function getError(): ?Message { return $this->errorMessage; } /** * Checks whether there was any error. * * @return bool whether an error occurred or not * * @access public */ public function isError(): bool { return $this->errorMessage !== null; } /** * checks the superglobals provided if the tbl_change form is submitted * and uses the submitted/selected file * * @param string $key the md5 hash of the column name * @param string $rownumber number of row to process * * @return bool success * * @access public */ public function checkTblChangeForm(string $key, string $rownumber): bool { if ($this->setUploadedFromTblChangeRequest($key, $rownumber)) { // well done ... $this->errorMessage = null; return true; } if ($this->setSelectedFromTblChangeRequest($key, $rownumber)) { // well done ... $this->errorMessage = null; return true; } // all failed, whether just no file uploaded/selected or an error return false; } /** * Sets named file to be read from UploadDir. * * @param string $name file name * * @return bool success * * @access public */ public function setLocalSelectedFile(string $name): bool { if (empty($GLOBALS['cfg']['UploadDir'])) { return false; } $this->setName( Util::userDir($GLOBALS['cfg']['UploadDir']) . Core::securePath($name) ); if (@is_link((string) $this->getName())) { $this->errorMessage = Message::error(__('File is a symbolic link')); $this->setName(null); return false; } if (! $this->isReadable()) { $this->errorMessage = Message::error(__('File could not be read!')); $this->setName(null); return false; } return true; } /** * Checks whether file can be read. * * @return bool whether the file is readable or not * * @access public */ public function isReadable(): bool { // suppress warnings from being displayed, but not from being logged // any file access outside of open_basedir will issue a warning return @is_readable((string) $this->getName()); } /** * If we are on a server with open_basedir, we must move the file * before opening it. The FAQ 1.11 explains how to create the "./tmp" * directory - if needed * * @return bool whether uploaded file is fine or not * * @todo move check of $cfg['TempDir'] into Config? * @access public */ public function checkUploadedFile(): bool { if ($this->isReadable()) { return true; } $tmp_subdir = $GLOBALS['PMA_Config']->getUploadTempDir(); if ($tmp_subdir === null) { // cannot create directory or access, point user to FAQ 1.11 $this->errorMessage = Message::error(__( 'Error moving the uploaded file, see [doc@faq1-11]FAQ 1.11[/doc].' )); return false; } $new_file_to_upload = (string) tempnam( $tmp_subdir, basename((string) $this->getName()) ); // suppress warnings from being displayed, but not from being logged // any file access outside of open_basedir will issue a warning ob_start(); $move_uploaded_file_result = move_uploaded_file( (string) $this->getName(), $new_file_to_upload ); ob_end_clean(); if (! $move_uploaded_file_result) { $this->errorMessage = Message::error(__('Error while moving uploaded file.')); return false; } $this->setName($new_file_to_upload); $this->isTemp(true); if (! $this->isReadable()) { $this->errorMessage = Message::error(__('Cannot read uploaded file.')); return false; } return true; } /** * Detects what compression the file uses * * @return string|false false on error, otherwise string MIME type of * compression, none for none * * @todo move file read part into readChunk() or getChunk() * @todo add support for compression plugins * @access protected */ protected function detectCompression() { // suppress warnings from being displayed, but not from being logged // f.e. any file access outside of open_basedir will issue a warning ob_start(); $file = fopen((string) $this->getName(), 'rb'); ob_end_clean(); if (! $file) { $this->errorMessage = Message::error(__('File could not be read!')); return false; } $this->compression = Util::getCompressionMimeType($file); return $this->compression; } /** * Sets whether the content should be decompressed before returned * * @param bool $decompress whether to decompress */ public function setDecompressContent(bool $decompress): void { $this->decompress = $decompress; } /** * Returns the file handle * * @return resource file handle */ public function getHandle() { if ($this->handle === null) { $this->open(); } return $this->handle; } /** * Sets the file handle * * @param resource $handle file handle */ public function setHandle($handle): void { $this->handle = $handle; } /** * Sets error message for unsupported compression. */ public function errorUnsupported(): void { $this->errorMessage = Message::error(sprintf( __( 'You attempted to load file with unsupported compression (%s). ' . 'Either support for it is not implemented or disabled by your ' . 'configuration.' ), $this->getCompression() )); } /** * Attempts to open the file. */ public function open(): bool { if (! $this->decompress) { $this->handle = @fopen((string) $this->getName(), 'r'); } switch ($this->getCompression()) { case false: return false; case 'application/bzip2': if (! $GLOBALS['cfg']['BZipDump'] || ! function_exists('bzopen')) { $this->errorUnsupported(); return false; } $this->handle = @bzopen($this->getName(), 'r'); break; case 'application/gzip': if (! $GLOBALS['cfg']['GZipDump'] || ! function_exists('gzopen')) { $this->errorUnsupported(); return false; } $this->handle = @gzopen((string) $this->getName(), 'r'); break; case 'application/zip': if ($GLOBALS['cfg']['ZipDump'] && function_exists('zip_open')) { return $this->openZip(); } $this->errorUnsupported(); return false; case 'none': $this->handle = @fopen((string) $this->getName(), 'r'); break; default: $this->errorUnsupported(); return false; } return $this->handle !== false; } /** * Opens file from zip * * @param string|null $specific_entry Entry to open */ public function openZip(?string $specific_entry = null): bool { $result = $this->zipExtension->getContents($this->getName(), $specific_entry); if (! empty($result['error'])) { $this->errorMessage = Message::rawError($result['error']); return false; } $this->content = $result['data']; $this->offset = 0; return true; } /** * Checks whether we've reached end of file */ public function eof(): bool { if ($this->handle !== null) { return feof($this->handle); } return $this->offset == strlen($this->content); } /** * Closes the file */ public function close(): void { if ($this->handle !== null) { fclose($this->handle); $this->handle = null; } else { $this->content = ''; $this->offset = 0; } $this->cleanUp(); } /** * Reads data from file * * @param int $size Number of bytes to read */ public function read(int $size): string { switch ($this->compression) { case 'application/bzip2': return bzread($this->handle, $size); case 'application/gzip': return gzread($this->handle, $size); case 'application/zip': $result = mb_strcut($this->content, $this->offset, $size); $this->offset += strlen($result); return $result; case 'none': default: return fread($this->handle, $size); } } /** * Returns the character set of the file * * @return string character set of the file */ public function getCharset(): string { return $this->charset; } /** * Sets the character set of the file * * @param string $charset character set of the file */ public function setCharset(string $charset): void { $this->charset = $charset; } /** * Returns compression used by file. * * @return string MIME type of compression, none for none * * @access public */ public function getCompression(): string { if ($this->compression === null) { return $this->detectCompression(); } return $this->compression; } /** * Returns the offset * * @return int the offset */ public function getOffset(): int { return $this->offset; } /** * Returns the chunk size * * @return int the chunk size */ public function getChunkSize(): int { return $this->chunkSize; } /** * Sets the chunk size * * @param int $chunkSize the chunk size */ public function setChunkSize(int $chunkSize): void { $this->chunkSize = $chunkSize; } /** * Returns the length of the content in the file * * @return int the length of the file content */ public function getContentLength(): int { return strlen($this->content); } }
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