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<?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, '/');
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)) {
$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);
$currentNodeName = ($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;
}
}
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