Search moodle.org's
Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
<?php

namespace Box\Spout\Reader\Wrapper;

/**
 * Class XMLReader
 * Wrapper around the built-in XMLReader
 * @see \XMLReader
 */
class XMLReader extends \XMLReader
{
    use XMLInternalErrorsHelper;

    const ZIP_WRAPPER = 'zip://';

    /**
     * Opens the XML Reader to read a file located inside a ZIP file.
     *
     * @param string $zipFilePath Path to the ZIP file
     * @param string $fileInsideZipPath Relative or absolute path of the file inside the zip
     * @return bool TRUE on success or FALSE on failure
     */
    public function openFileInZip($zipFilePath, $fileInsideZipPath)
    {
        $wasOpenSuccessful = false;
        $realPathURI = $this->getRealPathURIForFileInZip($zipFilePath, $fileInsideZipPath);

        // We need to check first that the file we are trying to read really exist because:
        //  - PHP emits a warning when trying to open a file that does not exist.
        //  - HHVM does not check if file exists within zip file (@link https://github.com/facebook/hhvm/issues/5779)
        if ($this->fileExistsWithinZip($realPathURI)) {
            $wasOpenSuccessful = $this->open($realPathURI, null, LIBXML_NONET);
        }

        return $wasOpenSuccessful;
    }

    /**
     * Returns the real path for the given path components.
     * This is useful to avoid issues on some Windows setup.
     *
     * @param string $zipFilePath Path to the ZIP file
     * @param string $fileInsideZipPath Relative or absolute path of the file inside the zip
     * @return string The real path URI
     */
    public function getRealPathURIForFileInZip($zipFilePath, $fileInsideZipPath)
    {
        // The file path should not start with a '/', otherwise it won't be found
< $fileInsideZipPathWithoutLeadingSlash = ltrim($fileInsideZipPath, '/');
> $fileInsideZipPathWithoutLeadingSlash = \ltrim($fileInsideZipPath, '/');
< return (self::ZIP_WRAPPER . realpath($zipFilePath) . '#' . $fileInsideZipPathWithoutLeadingSlash);
> return (self::ZIP_WRAPPER . \realpath($zipFilePath) . '#' . $fileInsideZipPathWithoutLeadingSlash);
} /** * Returns whether the file at the given location exists * * @param string $zipStreamURI URI of a zip stream, e.g. "zip://file.zip#path/inside.xml" * @return bool TRUE if the file exists, FALSE otherwise */ protected function fileExistsWithinZip($zipStreamURI) { $doesFileExists = false; $pattern = '/zip:\/\/([^#]+)#(.*)/';
< if (preg_match($pattern, $zipStreamURI, $matches)) {
> if (\preg_match($pattern, $zipStreamURI, $matches)) {
$zipFilePath = $matches[1]; $innerFilePath = $matches[2]; $zip = new \ZipArchive(); if ($zip->open($zipFilePath) === true) { $doesFileExists = ($zip->locateName($innerFilePath) !== false); $zip->close(); } } return $doesFileExists; } /** * Move to next node in document * @see \XMLReader::read * * @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred * @return bool TRUE on success or FALSE on failure */ public function read() { $this->useXMLInternalErrors(); $wasReadSuccessful = parent::read(); $this->resetXMLInternalErrorsSettingAndThrowIfXMLErrorOccured(); return $wasReadSuccessful; } /** * Read until the element with the given name is found, or the end of the file. * * @param string $nodeName Name of the node to find * @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred * @return bool TRUE on success or FALSE on failure */ public function readUntilNodeFound($nodeName) { do { $wasReadSuccessful = $this->read(); $isNotPositionedOnStartingNode = !$this->isPositionedOnStartingNode($nodeName); } while ($wasReadSuccessful && $isNotPositionedOnStartingNode); return $wasReadSuccessful; } /** * Move cursor to next node skipping all subtrees * @see \XMLReader::next * * @param string|null $localName The name of the next node to move to * @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred * @return bool TRUE on success or FALSE on failure */ public function next($localName = null) { $this->useXMLInternalErrors(); $wasNextSuccessful = parent::next($localName); $this->resetXMLInternalErrorsSettingAndThrowIfXMLErrorOccured(); return $wasNextSuccessful; } /** * @param string $nodeName * @return bool Whether the XML Reader is currently positioned on the starting node with given name */ public function isPositionedOnStartingNode($nodeName) { return $this->isPositionedOnNode($nodeName, self::ELEMENT); } /** * @param string $nodeName * @return bool Whether the XML Reader is currently positioned on the ending node with given name */ public function isPositionedOnEndingNode($nodeName) { return $this->isPositionedOnNode($nodeName, self::END_ELEMENT); } /** * @param string $nodeName * @param int $nodeType * @return bool Whether the XML Reader is currently positioned on the node with given name and type */ private function isPositionedOnNode($nodeName, $nodeType) { // In some cases, the node has a prefix (for instance, "<sheet>" can also be "<x:sheet>"). // So if the given node name does not have a prefix, we need to look at the unprefixed name ("localName"). // @see https://github.com/box/spout/issues/233
< $hasPrefix = (strpos($nodeName, ':') !== false);
> $hasPrefix = (\strpos($nodeName, ':') !== false);
$currentNodeName = ($hasPrefix) ? $this->name : $this->localName; return ($this->nodeType === $nodeType && $currentNodeName === $nodeName); } /** * @return string The name of the current node, un-prefixed */ public function getCurrentNodeName() { return $this->localName; } }